1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2009 Rick Macklem, University of Guelph 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include "opt_inet.h" 34 #include "opt_inet6.h" 35 #include <sys/extattr.h> 36 #include <fs/nfs/nfsport.h> 37 38 struct nfsrv_stablefirst nfsrv_stablefirst; 39 int nfsrv_issuedelegs = 0; 40 int nfsrv_dolocallocks = 0; 41 struct nfsv4lock nfsv4rootfs_lock; 42 time_t nfsdev_time = 0; 43 int nfsrv_layouthashsize; 44 volatile int nfsrv_layoutcnt = 0; 45 46 extern int newnfs_numnfsd; 47 extern struct nfsstatsv1 nfsstatsv1; 48 extern int nfsrv_lease; 49 extern struct timeval nfsboottime; 50 extern u_int32_t newnfs_true, newnfs_false; 51 extern struct mtx nfsrv_dslock_mtx; 52 extern struct mtx nfsrv_recalllock_mtx; 53 extern struct mtx nfsrv_dontlistlock_mtx; 54 extern int nfsd_debuglevel; 55 extern u_int nfsrv_dsdirsize; 56 extern struct nfsdevicehead nfsrv_devidhead; 57 extern int nfsrv_doflexfile; 58 extern int nfsrv_maxpnfsmirror; 59 NFSV4ROOTLOCKMUTEX; 60 NFSSTATESPINLOCK; 61 extern struct nfsdontlisthead nfsrv_dontlisthead; 62 extern volatile int nfsrv_devidcnt; 63 extern struct nfslayouthead nfsrv_recalllisthead; 64 extern char *nfsrv_zeropnfsdat; 65 66 SYSCTL_DECL(_vfs_nfsd); 67 int nfsrv_statehashsize = NFSSTATEHASHSIZE; 68 SYSCTL_INT(_vfs_nfsd, OID_AUTO, statehashsize, CTLFLAG_RDTUN, 69 &nfsrv_statehashsize, 0, 70 "Size of state hash table set via loader.conf"); 71 72 int nfsrv_clienthashsize = NFSCLIENTHASHSIZE; 73 SYSCTL_INT(_vfs_nfsd, OID_AUTO, clienthashsize, CTLFLAG_RDTUN, 74 &nfsrv_clienthashsize, 0, 75 "Size of client hash table set via loader.conf"); 76 77 int nfsrv_lockhashsize = NFSLOCKHASHSIZE; 78 SYSCTL_INT(_vfs_nfsd, OID_AUTO, fhhashsize, CTLFLAG_RDTUN, 79 &nfsrv_lockhashsize, 0, 80 "Size of file handle hash table set via loader.conf"); 81 82 int nfsrv_sessionhashsize = NFSSESSIONHASHSIZE; 83 SYSCTL_INT(_vfs_nfsd, OID_AUTO, sessionhashsize, CTLFLAG_RDTUN, 84 &nfsrv_sessionhashsize, 0, 85 "Size of session hash table set via loader.conf"); 86 87 int nfsrv_layouthighwater = NFSLAYOUTHIGHWATER; 88 SYSCTL_INT(_vfs_nfsd, OID_AUTO, layouthighwater, CTLFLAG_RDTUN, 89 &nfsrv_layouthighwater, 0, 90 "High water mark for number of layouts set via loader.conf"); 91 92 static int nfsrv_v4statelimit = NFSRV_V4STATELIMIT; 93 SYSCTL_INT(_vfs_nfsd, OID_AUTO, v4statelimit, CTLFLAG_RWTUN, 94 &nfsrv_v4statelimit, 0, 95 "High water limit for NFSv4 opens+locks+delegations"); 96 97 static int nfsrv_writedelegifpos = 0; 98 SYSCTL_INT(_vfs_nfsd, OID_AUTO, writedelegifpos, CTLFLAG_RW, 99 &nfsrv_writedelegifpos, 0, 100 "Issue a write delegation for read opens if possible"); 101 102 static int nfsrv_allowreadforwriteopen = 1; 103 SYSCTL_INT(_vfs_nfsd, OID_AUTO, allowreadforwriteopen, CTLFLAG_RW, 104 &nfsrv_allowreadforwriteopen, 0, 105 "Allow Reads to be done with Write Access StateIDs"); 106 107 int nfsrv_pnfsatime = 0; 108 SYSCTL_INT(_vfs_nfsd, OID_AUTO, pnfsstrictatime, CTLFLAG_RW, 109 &nfsrv_pnfsatime, 0, 110 "For pNFS service, do Getattr ops to keep atime up-to-date"); 111 112 int nfsrv_flexlinuxhack = 0; 113 SYSCTL_INT(_vfs_nfsd, OID_AUTO, flexlinuxhack, CTLFLAG_RW, 114 &nfsrv_flexlinuxhack, 0, 115 "For Linux clients, hack around Flex File Layout bug"); 116 117 /* 118 * Hash lists for nfs V4. 119 */ 120 struct nfsclienthashhead *nfsclienthash; 121 struct nfslockhashhead *nfslockhash; 122 struct nfssessionhash *nfssessionhash; 123 struct nfslayouthash *nfslayouthash; 124 volatile int nfsrv_dontlistlen = 0; 125 126 static u_int32_t nfsrv_openpluslock = 0, nfsrv_delegatecnt = 0; 127 static time_t nfsrvboottime; 128 static int nfsrv_returnoldstateid = 0, nfsrv_clients = 0; 129 static int nfsrv_clienthighwater = NFSRV_CLIENTHIGHWATER; 130 static int nfsrv_nogsscallback = 0; 131 static volatile int nfsrv_writedelegcnt = 0; 132 static int nfsrv_faildscnt; 133 134 /* local functions */ 135 static void nfsrv_dumpaclient(struct nfsclient *clp, 136 struct nfsd_dumpclients *dumpp); 137 static void nfsrv_freeopenowner(struct nfsstate *stp, int cansleep, 138 NFSPROC_T *p); 139 static int nfsrv_freeopen(struct nfsstate *stp, vnode_t vp, int cansleep, 140 NFSPROC_T *p); 141 static void nfsrv_freelockowner(struct nfsstate *stp, vnode_t vp, int cansleep, 142 NFSPROC_T *p); 143 static void nfsrv_freeallnfslocks(struct nfsstate *stp, vnode_t vp, 144 int cansleep, NFSPROC_T *p); 145 static void nfsrv_freenfslock(struct nfslock *lop); 146 static void nfsrv_freenfslockfile(struct nfslockfile *lfp); 147 static void nfsrv_freedeleg(struct nfsstate *); 148 static int nfsrv_getstate(struct nfsclient *clp, nfsv4stateid_t *stateidp, 149 u_int32_t flags, struct nfsstate **stpp); 150 static void nfsrv_getowner(struct nfsstatehead *hp, struct nfsstate *new_stp, 151 struct nfsstate **stpp); 152 static int nfsrv_getlockfh(vnode_t vp, u_short flags, 153 struct nfslockfile *new_lfp, fhandle_t *nfhp, NFSPROC_T *p); 154 static int nfsrv_getlockfile(u_short flags, struct nfslockfile **new_lfpp, 155 struct nfslockfile **lfpp, fhandle_t *nfhp, int lockit); 156 static void nfsrv_insertlock(struct nfslock *new_lop, 157 struct nfslock *insert_lop, struct nfsstate *stp, struct nfslockfile *lfp); 158 static void nfsrv_updatelock(struct nfsstate *stp, struct nfslock **new_lopp, 159 struct nfslock **other_lopp, struct nfslockfile *lfp); 160 static int nfsrv_getipnumber(u_char *cp); 161 static int nfsrv_checkrestart(nfsquad_t clientid, u_int32_t flags, 162 nfsv4stateid_t *stateidp, int specialid); 163 static int nfsrv_checkgrace(struct nfsrv_descript *nd, struct nfsclient *clp, 164 u_int32_t flags); 165 static int nfsrv_docallback(struct nfsclient *clp, int procnum, 166 nfsv4stateid_t *stateidp, int trunc, fhandle_t *fhp, 167 struct nfsvattr *nap, nfsattrbit_t *attrbitp, int laytype, NFSPROC_T *p); 168 static int nfsrv_cbcallargs(struct nfsrv_descript *nd, struct nfsclient *clp, 169 uint32_t callback, int op, const char *optag, struct nfsdsession **sepp); 170 static u_int32_t nfsrv_nextclientindex(void); 171 static u_int32_t nfsrv_nextstateindex(struct nfsclient *clp); 172 static void nfsrv_markstable(struct nfsclient *clp); 173 static void nfsrv_markreclaim(struct nfsclient *clp); 174 static int nfsrv_checkstable(struct nfsclient *clp); 175 static int nfsrv_clientconflict(struct nfsclient *clp, int *haslockp, struct 176 vnode *vp, NFSPROC_T *p); 177 static int nfsrv_delegconflict(struct nfsstate *stp, int *haslockp, 178 NFSPROC_T *p, vnode_t vp); 179 static int nfsrv_cleandeleg(vnode_t vp, struct nfslockfile *lfp, 180 struct nfsclient *clp, int *haslockp, NFSPROC_T *p); 181 static int nfsrv_notsamecredname(struct nfsrv_descript *nd, 182 struct nfsclient *clp); 183 static time_t nfsrv_leaseexpiry(void); 184 static void nfsrv_delaydelegtimeout(struct nfsstate *stp); 185 static int nfsrv_checkseqid(struct nfsrv_descript *nd, u_int32_t seqid, 186 struct nfsstate *stp, struct nfsrvcache *op); 187 static int nfsrv_nootherstate(struct nfsstate *stp); 188 static int nfsrv_locallock(vnode_t vp, struct nfslockfile *lfp, int flags, 189 uint64_t first, uint64_t end, struct nfslockconflict *cfp, NFSPROC_T *p); 190 static void nfsrv_localunlock(vnode_t vp, struct nfslockfile *lfp, 191 uint64_t init_first, uint64_t init_end, NFSPROC_T *p); 192 static int nfsrv_dolocal(vnode_t vp, struct nfslockfile *lfp, int flags, 193 int oldflags, uint64_t first, uint64_t end, struct nfslockconflict *cfp, 194 NFSPROC_T *p); 195 static void nfsrv_locallock_rollback(vnode_t vp, struct nfslockfile *lfp, 196 NFSPROC_T *p); 197 static void nfsrv_locallock_commit(struct nfslockfile *lfp, int flags, 198 uint64_t first, uint64_t end); 199 static void nfsrv_locklf(struct nfslockfile *lfp); 200 static void nfsrv_unlocklf(struct nfslockfile *lfp); 201 static struct nfsdsession *nfsrv_findsession(uint8_t *sessionid); 202 static int nfsrv_freesession(struct nfsdsession *sep, uint8_t *sessionid); 203 static int nfsv4_setcbsequence(struct nfsrv_descript *nd, struct nfsclient *clp, 204 int dont_replycache, struct nfsdsession **sepp); 205 static int nfsv4_getcbsession(struct nfsclient *clp, struct nfsdsession **sepp); 206 static int nfsrv_addlayout(struct nfsrv_descript *nd, struct nfslayout **lypp, 207 nfsv4stateid_t *stateidp, char *layp, int *layoutlenp, NFSPROC_T *p); 208 static void nfsrv_freelayout(struct nfslayouthead *lhp, struct nfslayout *lyp); 209 static void nfsrv_freelayoutlist(nfsquad_t clientid); 210 static void nfsrv_freelayouts(nfsquad_t *clid, fsid_t *fs, int laytype, 211 int iomode); 212 static void nfsrv_freealllayouts(void); 213 static void nfsrv_freedevid(struct nfsdevice *ds); 214 static int nfsrv_setdsserver(char *dspathp, char *mdspathp, NFSPROC_T *p, 215 struct nfsdevice **dsp); 216 static void nfsrv_deleteds(struct nfsdevice *fndds); 217 static void nfsrv_allocdevid(struct nfsdevice *ds, char *addr, char *dnshost); 218 static void nfsrv_freealldevids(void); 219 static void nfsrv_flexlayouterr(struct nfsrv_descript *nd, uint32_t *layp, 220 int maxcnt, NFSPROC_T *p); 221 static int nfsrv_recalllayout(nfsquad_t clid, nfsv4stateid_t *stateidp, 222 fhandle_t *fhp, struct nfslayout *lyp, int changed, int laytype, 223 NFSPROC_T *p); 224 static int nfsrv_findlayout(nfsquad_t *clientidp, fhandle_t *fhp, int laytype, 225 NFSPROC_T *, struct nfslayout **lypp); 226 static int nfsrv_fndclid(nfsquad_t *clidvec, nfsquad_t clid, int clidcnt); 227 static struct nfslayout *nfsrv_filelayout(struct nfsrv_descript *nd, int iomode, 228 fhandle_t *fhp, fhandle_t *dsfhp, char *devid, fsid_t fs); 229 static struct nfslayout *nfsrv_flexlayout(struct nfsrv_descript *nd, int iomode, 230 int mirrorcnt, fhandle_t *fhp, fhandle_t *dsfhp, char *devid, fsid_t fs); 231 static int nfsrv_dontlayout(fhandle_t *fhp); 232 static int nfsrv_createdsfile(vnode_t vp, fhandle_t *fhp, struct pnfsdsfile *pf, 233 vnode_t dvp, struct nfsdevice *ds, struct ucred *cred, NFSPROC_T *p, 234 vnode_t *tvpp); 235 static struct nfsdevice *nfsrv_findmirroredds(struct nfsmount *nmp); 236 237 /* 238 * Scan the client list for a match and either return the current one, 239 * create a new entry or return an error. 240 * If returning a non-error, the clp structure must either be linked into 241 * the client list or free'd. 242 */ 243 int 244 nfsrv_setclient(struct nfsrv_descript *nd, struct nfsclient **new_clpp, 245 nfsquad_t *clientidp, nfsquad_t *confirmp, NFSPROC_T *p) 246 { 247 struct nfsclient *clp = NULL, *new_clp = *new_clpp; 248 int i, error = 0, ret; 249 struct nfsstate *stp, *tstp; 250 #ifdef INET 251 struct sockaddr_in *sin, *rin; 252 #endif 253 #ifdef INET6 254 struct sockaddr_in6 *sin6, *rin6; 255 #endif 256 struct nfsdsession *sep, *nsep; 257 int zapit = 0, gotit, hasstate = 0, igotlock; 258 static u_int64_t confirm_index = 0; 259 260 /* 261 * Check for state resource limit exceeded. 262 */ 263 if (nfsrv_openpluslock > nfsrv_v4statelimit) { 264 error = NFSERR_RESOURCE; 265 goto out; 266 } 267 268 if (nfsrv_issuedelegs == 0 || 269 ((nd->nd_flag & ND_GSS) != 0 && nfsrv_nogsscallback != 0)) 270 /* 271 * Don't do callbacks when delegations are disabled or 272 * for AUTH_GSS unless enabled via nfsrv_nogsscallback. 273 * If establishing a callback connection is attempted 274 * when a firewall is blocking the callback path, the 275 * server may wait too long for the connect attempt to 276 * succeed during the Open. Some clients, such as Linux, 277 * may timeout and give up on the Open before the server 278 * replies. Also, since AUTH_GSS callbacks are not 279 * yet interoperability tested, they might cause the 280 * server to crap out, if they get past the Init call to 281 * the client. 282 */ 283 new_clp->lc_program = 0; 284 285 /* Lock out other nfsd threads */ 286 NFSLOCKV4ROOTMUTEX(); 287 nfsv4_relref(&nfsv4rootfs_lock); 288 do { 289 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 290 NFSV4ROOTLOCKMUTEXPTR, NULL); 291 } while (!igotlock); 292 NFSUNLOCKV4ROOTMUTEX(); 293 294 /* 295 * Search for a match in the client list. 296 */ 297 gotit = i = 0; 298 while (i < nfsrv_clienthashsize && !gotit) { 299 LIST_FOREACH(clp, &nfsclienthash[i], lc_hash) { 300 if (new_clp->lc_idlen == clp->lc_idlen && 301 !NFSBCMP(new_clp->lc_id, clp->lc_id, clp->lc_idlen)) { 302 gotit = 1; 303 break; 304 } 305 } 306 if (gotit == 0) 307 i++; 308 } 309 if (!gotit || 310 (clp->lc_flags & (LCL_NEEDSCONFIRM | LCL_ADMINREVOKED))) { 311 if ((nd->nd_flag & ND_NFSV41) != 0 && confirmp->lval[1] != 0) { 312 /* 313 * For NFSv4.1, if confirmp->lval[1] is non-zero, the 314 * client is trying to update a confirmed clientid. 315 */ 316 NFSLOCKV4ROOTMUTEX(); 317 nfsv4_unlock(&nfsv4rootfs_lock, 1); 318 NFSUNLOCKV4ROOTMUTEX(); 319 confirmp->lval[1] = 0; 320 error = NFSERR_NOENT; 321 goto out; 322 } 323 /* 324 * Get rid of the old one. 325 */ 326 if (i != nfsrv_clienthashsize) { 327 LIST_REMOVE(clp, lc_hash); 328 nfsrv_cleanclient(clp, p); 329 nfsrv_freedeleglist(&clp->lc_deleg); 330 nfsrv_freedeleglist(&clp->lc_olddeleg); 331 zapit = 1; 332 } 333 /* 334 * Add it after assigning a client id to it. 335 */ 336 new_clp->lc_flags |= LCL_NEEDSCONFIRM; 337 if ((nd->nd_flag & ND_NFSV41) != 0) 338 new_clp->lc_confirm.lval[0] = confirmp->lval[0] = 339 ++confirm_index; 340 else 341 confirmp->qval = new_clp->lc_confirm.qval = 342 ++confirm_index; 343 clientidp->lval[0] = new_clp->lc_clientid.lval[0] = 344 (u_int32_t)nfsrvboottime; 345 clientidp->lval[1] = new_clp->lc_clientid.lval[1] = 346 nfsrv_nextclientindex(); 347 new_clp->lc_stateindex = 0; 348 new_clp->lc_statemaxindex = 0; 349 new_clp->lc_cbref = 0; 350 new_clp->lc_expiry = nfsrv_leaseexpiry(); 351 LIST_INIT(&new_clp->lc_open); 352 LIST_INIT(&new_clp->lc_deleg); 353 LIST_INIT(&new_clp->lc_olddeleg); 354 LIST_INIT(&new_clp->lc_session); 355 for (i = 0; i < nfsrv_statehashsize; i++) 356 LIST_INIT(&new_clp->lc_stateid[i]); 357 LIST_INSERT_HEAD(NFSCLIENTHASH(new_clp->lc_clientid), new_clp, 358 lc_hash); 359 nfsstatsv1.srvclients++; 360 nfsrv_openpluslock++; 361 nfsrv_clients++; 362 NFSLOCKV4ROOTMUTEX(); 363 nfsv4_unlock(&nfsv4rootfs_lock, 1); 364 NFSUNLOCKV4ROOTMUTEX(); 365 if (zapit) 366 nfsrv_zapclient(clp, p); 367 *new_clpp = NULL; 368 goto out; 369 } 370 371 /* 372 * Now, handle the cases where the id is already issued. 373 */ 374 if (nfsrv_notsamecredname(nd, clp)) { 375 /* 376 * Check to see if there is expired state that should go away. 377 */ 378 if (clp->lc_expiry < NFSD_MONOSEC && 379 (!LIST_EMPTY(&clp->lc_open) || !LIST_EMPTY(&clp->lc_deleg))) { 380 nfsrv_cleanclient(clp, p); 381 nfsrv_freedeleglist(&clp->lc_deleg); 382 } 383 384 /* 385 * If there is outstanding state, then reply NFSERR_CLIDINUSE per 386 * RFC3530 Sec. 8.1.2 last para. 387 */ 388 if (!LIST_EMPTY(&clp->lc_deleg)) { 389 hasstate = 1; 390 } else if (LIST_EMPTY(&clp->lc_open)) { 391 hasstate = 0; 392 } else { 393 hasstate = 0; 394 /* Look for an Open on the OpenOwner */ 395 LIST_FOREACH(stp, &clp->lc_open, ls_list) { 396 if (!LIST_EMPTY(&stp->ls_open)) { 397 hasstate = 1; 398 break; 399 } 400 } 401 } 402 if (hasstate) { 403 /* 404 * If the uid doesn't match, return NFSERR_CLIDINUSE after 405 * filling out the correct ipaddr and portnum. 406 */ 407 switch (clp->lc_req.nr_nam->sa_family) { 408 #ifdef INET 409 case AF_INET: 410 sin = (struct sockaddr_in *)new_clp->lc_req.nr_nam; 411 rin = (struct sockaddr_in *)clp->lc_req.nr_nam; 412 sin->sin_addr.s_addr = rin->sin_addr.s_addr; 413 sin->sin_port = rin->sin_port; 414 break; 415 #endif 416 #ifdef INET6 417 case AF_INET6: 418 sin6 = (struct sockaddr_in6 *)new_clp->lc_req.nr_nam; 419 rin6 = (struct sockaddr_in6 *)clp->lc_req.nr_nam; 420 sin6->sin6_addr = rin6->sin6_addr; 421 sin6->sin6_port = rin6->sin6_port; 422 break; 423 #endif 424 } 425 NFSLOCKV4ROOTMUTEX(); 426 nfsv4_unlock(&nfsv4rootfs_lock, 1); 427 NFSUNLOCKV4ROOTMUTEX(); 428 error = NFSERR_CLIDINUSE; 429 goto out; 430 } 431 } 432 433 if (NFSBCMP(new_clp->lc_verf, clp->lc_verf, NFSX_VERF)) { 434 /* 435 * If the verifier has changed, the client has rebooted 436 * and a new client id is issued. The old state info 437 * can be thrown away once the SETCLIENTID_CONFIRM occurs. 438 */ 439 LIST_REMOVE(clp, lc_hash); 440 441 /* Get rid of all sessions on this clientid. */ 442 LIST_FOREACH_SAFE(sep, &clp->lc_session, sess_list, nsep) { 443 ret = nfsrv_freesession(sep, NULL); 444 if (ret != 0) 445 printf("nfsrv_setclient: verifier changed free" 446 " session failed=%d\n", ret); 447 } 448 449 new_clp->lc_flags |= LCL_NEEDSCONFIRM; 450 if ((nd->nd_flag & ND_NFSV41) != 0) 451 new_clp->lc_confirm.lval[0] = confirmp->lval[0] = 452 ++confirm_index; 453 else 454 confirmp->qval = new_clp->lc_confirm.qval = 455 ++confirm_index; 456 clientidp->lval[0] = new_clp->lc_clientid.lval[0] = 457 nfsrvboottime; 458 clientidp->lval[1] = new_clp->lc_clientid.lval[1] = 459 nfsrv_nextclientindex(); 460 new_clp->lc_stateindex = 0; 461 new_clp->lc_statemaxindex = 0; 462 new_clp->lc_cbref = 0; 463 new_clp->lc_expiry = nfsrv_leaseexpiry(); 464 465 /* 466 * Save the state until confirmed. 467 */ 468 LIST_NEWHEAD(&new_clp->lc_open, &clp->lc_open, ls_list); 469 LIST_FOREACH(tstp, &new_clp->lc_open, ls_list) 470 tstp->ls_clp = new_clp; 471 LIST_NEWHEAD(&new_clp->lc_deleg, &clp->lc_deleg, ls_list); 472 LIST_FOREACH(tstp, &new_clp->lc_deleg, ls_list) 473 tstp->ls_clp = new_clp; 474 LIST_NEWHEAD(&new_clp->lc_olddeleg, &clp->lc_olddeleg, 475 ls_list); 476 LIST_FOREACH(tstp, &new_clp->lc_olddeleg, ls_list) 477 tstp->ls_clp = new_clp; 478 for (i = 0; i < nfsrv_statehashsize; i++) { 479 LIST_NEWHEAD(&new_clp->lc_stateid[i], 480 &clp->lc_stateid[i], ls_hash); 481 LIST_FOREACH(tstp, &new_clp->lc_stateid[i], ls_hash) 482 tstp->ls_clp = new_clp; 483 } 484 LIST_INIT(&new_clp->lc_session); 485 LIST_INSERT_HEAD(NFSCLIENTHASH(new_clp->lc_clientid), new_clp, 486 lc_hash); 487 nfsstatsv1.srvclients++; 488 nfsrv_openpluslock++; 489 nfsrv_clients++; 490 NFSLOCKV4ROOTMUTEX(); 491 nfsv4_unlock(&nfsv4rootfs_lock, 1); 492 NFSUNLOCKV4ROOTMUTEX(); 493 494 /* 495 * Must wait until any outstanding callback on the old clp 496 * completes. 497 */ 498 NFSLOCKSTATE(); 499 while (clp->lc_cbref) { 500 clp->lc_flags |= LCL_WAKEUPWANTED; 501 (void)mtx_sleep(clp, NFSSTATEMUTEXPTR, PZERO - 1, 502 "nfsd clp", 10 * hz); 503 } 504 NFSUNLOCKSTATE(); 505 nfsrv_zapclient(clp, p); 506 *new_clpp = NULL; 507 goto out; 508 } 509 510 /* For NFSv4.1, mark that we found a confirmed clientid. */ 511 if ((nd->nd_flag & ND_NFSV41) != 0) { 512 clientidp->lval[0] = clp->lc_clientid.lval[0]; 513 clientidp->lval[1] = clp->lc_clientid.lval[1]; 514 confirmp->lval[0] = 0; /* Ignored by client */ 515 confirmp->lval[1] = 1; 516 } else { 517 /* 518 * id and verifier match, so update the net address info 519 * and get rid of any existing callback authentication 520 * handle, so a new one will be acquired. 521 */ 522 LIST_REMOVE(clp, lc_hash); 523 new_clp->lc_flags |= (LCL_NEEDSCONFIRM | LCL_DONTCLEAN); 524 new_clp->lc_expiry = nfsrv_leaseexpiry(); 525 confirmp->qval = new_clp->lc_confirm.qval = ++confirm_index; 526 clientidp->lval[0] = new_clp->lc_clientid.lval[0] = 527 clp->lc_clientid.lval[0]; 528 clientidp->lval[1] = new_clp->lc_clientid.lval[1] = 529 clp->lc_clientid.lval[1]; 530 new_clp->lc_delegtime = clp->lc_delegtime; 531 new_clp->lc_stateindex = clp->lc_stateindex; 532 new_clp->lc_statemaxindex = clp->lc_statemaxindex; 533 new_clp->lc_cbref = 0; 534 LIST_NEWHEAD(&new_clp->lc_open, &clp->lc_open, ls_list); 535 LIST_FOREACH(tstp, &new_clp->lc_open, ls_list) 536 tstp->ls_clp = new_clp; 537 LIST_NEWHEAD(&new_clp->lc_deleg, &clp->lc_deleg, ls_list); 538 LIST_FOREACH(tstp, &new_clp->lc_deleg, ls_list) 539 tstp->ls_clp = new_clp; 540 LIST_NEWHEAD(&new_clp->lc_olddeleg, &clp->lc_olddeleg, ls_list); 541 LIST_FOREACH(tstp, &new_clp->lc_olddeleg, ls_list) 542 tstp->ls_clp = new_clp; 543 for (i = 0; i < nfsrv_statehashsize; i++) { 544 LIST_NEWHEAD(&new_clp->lc_stateid[i], 545 &clp->lc_stateid[i], ls_hash); 546 LIST_FOREACH(tstp, &new_clp->lc_stateid[i], ls_hash) 547 tstp->ls_clp = new_clp; 548 } 549 LIST_INIT(&new_clp->lc_session); 550 LIST_INSERT_HEAD(NFSCLIENTHASH(new_clp->lc_clientid), new_clp, 551 lc_hash); 552 nfsstatsv1.srvclients++; 553 nfsrv_openpluslock++; 554 nfsrv_clients++; 555 } 556 NFSLOCKV4ROOTMUTEX(); 557 nfsv4_unlock(&nfsv4rootfs_lock, 1); 558 NFSUNLOCKV4ROOTMUTEX(); 559 560 if ((nd->nd_flag & ND_NFSV41) == 0) { 561 /* 562 * Must wait until any outstanding callback on the old clp 563 * completes. 564 */ 565 NFSLOCKSTATE(); 566 while (clp->lc_cbref) { 567 clp->lc_flags |= LCL_WAKEUPWANTED; 568 (void)mtx_sleep(clp, NFSSTATEMUTEXPTR, PZERO - 1, 569 "nfsdclp", 10 * hz); 570 } 571 NFSUNLOCKSTATE(); 572 nfsrv_zapclient(clp, p); 573 *new_clpp = NULL; 574 } 575 576 out: 577 NFSEXITCODE2(error, nd); 578 return (error); 579 } 580 581 /* 582 * Check to see if the client id exists and optionally confirm it. 583 */ 584 int 585 nfsrv_getclient(nfsquad_t clientid, int opflags, struct nfsclient **clpp, 586 struct nfsdsession *nsep, nfsquad_t confirm, uint32_t cbprogram, 587 struct nfsrv_descript *nd, NFSPROC_T *p) 588 { 589 struct nfsclient *clp; 590 struct nfsstate *stp; 591 int i; 592 struct nfsclienthashhead *hp; 593 int error = 0, igotlock, doneok; 594 struct nfssessionhash *shp; 595 struct nfsdsession *sep; 596 uint64_t sessid[2]; 597 static uint64_t next_sess = 0; 598 599 if (clpp) 600 *clpp = NULL; 601 if ((nd == NULL || (nd->nd_flag & ND_NFSV41) == 0 || 602 opflags != CLOPS_RENEW) && nfsrvboottime != clientid.lval[0]) { 603 error = NFSERR_STALECLIENTID; 604 goto out; 605 } 606 607 /* 608 * If called with opflags == CLOPS_RENEW, the State Lock is 609 * already held. Otherwise, we need to get either that or, 610 * for the case of Confirm, lock out the nfsd threads. 611 */ 612 if (opflags & CLOPS_CONFIRM) { 613 NFSLOCKV4ROOTMUTEX(); 614 nfsv4_relref(&nfsv4rootfs_lock); 615 do { 616 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 617 NFSV4ROOTLOCKMUTEXPTR, NULL); 618 } while (!igotlock); 619 /* 620 * Create a new sessionid here, since we need to do it where 621 * there is a mutex held to serialize update of next_sess. 622 */ 623 if ((nd->nd_flag & ND_NFSV41) != 0) { 624 sessid[0] = ++next_sess; 625 sessid[1] = clientid.qval; 626 } 627 NFSUNLOCKV4ROOTMUTEX(); 628 } else if (opflags != CLOPS_RENEW) { 629 NFSLOCKSTATE(); 630 } 631 632 /* For NFSv4.1, the clp is acquired from the associated session. */ 633 if (nd != NULL && (nd->nd_flag & ND_NFSV41) != 0 && 634 opflags == CLOPS_RENEW) { 635 clp = NULL; 636 if ((nd->nd_flag & ND_HASSEQUENCE) != 0) { 637 shp = NFSSESSIONHASH(nd->nd_sessionid); 638 NFSLOCKSESSION(shp); 639 sep = nfsrv_findsession(nd->nd_sessionid); 640 if (sep != NULL) 641 clp = sep->sess_clp; 642 NFSUNLOCKSESSION(shp); 643 } 644 } else { 645 hp = NFSCLIENTHASH(clientid); 646 LIST_FOREACH(clp, hp, lc_hash) { 647 if (clp->lc_clientid.lval[1] == clientid.lval[1]) 648 break; 649 } 650 } 651 if (clp == NULL) { 652 if (opflags & CLOPS_CONFIRM) 653 error = NFSERR_STALECLIENTID; 654 else 655 error = NFSERR_EXPIRED; 656 } else if (clp->lc_flags & LCL_ADMINREVOKED) { 657 /* 658 * If marked admin revoked, just return the error. 659 */ 660 error = NFSERR_ADMINREVOKED; 661 } 662 if (error) { 663 if (opflags & CLOPS_CONFIRM) { 664 NFSLOCKV4ROOTMUTEX(); 665 nfsv4_unlock(&nfsv4rootfs_lock, 1); 666 NFSUNLOCKV4ROOTMUTEX(); 667 } else if (opflags != CLOPS_RENEW) { 668 NFSUNLOCKSTATE(); 669 } 670 goto out; 671 } 672 673 /* 674 * Perform any operations specified by the opflags. 675 */ 676 if (opflags & CLOPS_CONFIRM) { 677 if (((nd->nd_flag & ND_NFSV41) != 0 && 678 clp->lc_confirm.lval[0] != confirm.lval[0]) || 679 ((nd->nd_flag & ND_NFSV41) == 0 && 680 clp->lc_confirm.qval != confirm.qval)) 681 error = NFSERR_STALECLIENTID; 682 else if (nfsrv_notsamecredname(nd, clp)) 683 error = NFSERR_CLIDINUSE; 684 685 if (!error) { 686 if ((clp->lc_flags & (LCL_NEEDSCONFIRM | LCL_DONTCLEAN)) == 687 LCL_NEEDSCONFIRM) { 688 /* 689 * Hang onto the delegations (as old delegations) 690 * for an Open with CLAIM_DELEGATE_PREV unless in 691 * grace, but get rid of the rest of the state. 692 */ 693 nfsrv_cleanclient(clp, p); 694 nfsrv_freedeleglist(&clp->lc_olddeleg); 695 if (nfsrv_checkgrace(nd, clp, 0)) { 696 /* In grace, so just delete delegations */ 697 nfsrv_freedeleglist(&clp->lc_deleg); 698 } else { 699 LIST_FOREACH(stp, &clp->lc_deleg, ls_list) 700 stp->ls_flags |= NFSLCK_OLDDELEG; 701 clp->lc_delegtime = NFSD_MONOSEC + 702 nfsrv_lease + NFSRV_LEASEDELTA; 703 LIST_NEWHEAD(&clp->lc_olddeleg, &clp->lc_deleg, 704 ls_list); 705 } 706 if ((nd->nd_flag & ND_NFSV41) != 0) 707 clp->lc_program = cbprogram; 708 } 709 clp->lc_flags &= ~(LCL_NEEDSCONFIRM | LCL_DONTCLEAN); 710 if (clp->lc_program) 711 clp->lc_flags |= LCL_NEEDSCBNULL; 712 /* For NFSv4.1, link the session onto the client. */ 713 if (nsep != NULL) { 714 /* Hold a reference on the xprt for a backchannel. */ 715 if ((nsep->sess_crflags & NFSV4CRSESS_CONNBACKCHAN) 716 != 0) { 717 if (clp->lc_req.nr_client == NULL) 718 clp->lc_req.nr_client = (struct __rpc_client *) 719 clnt_bck_create(nd->nd_xprt->xp_socket, 720 cbprogram, NFSV4_CBVERS); 721 if (clp->lc_req.nr_client != NULL) { 722 SVC_ACQUIRE(nd->nd_xprt); 723 nd->nd_xprt->xp_p2 = 724 clp->lc_req.nr_client->cl_private; 725 /* Disable idle timeout. */ 726 nd->nd_xprt->xp_idletimeout = 0; 727 nsep->sess_cbsess.nfsess_xprt = nd->nd_xprt; 728 } else 729 nsep->sess_crflags &= ~NFSV4CRSESS_CONNBACKCHAN; 730 } 731 NFSBCOPY(sessid, nsep->sess_sessionid, 732 NFSX_V4SESSIONID); 733 NFSBCOPY(sessid, nsep->sess_cbsess.nfsess_sessionid, 734 NFSX_V4SESSIONID); 735 shp = NFSSESSIONHASH(nsep->sess_sessionid); 736 NFSLOCKSTATE(); 737 NFSLOCKSESSION(shp); 738 LIST_INSERT_HEAD(&shp->list, nsep, sess_hash); 739 LIST_INSERT_HEAD(&clp->lc_session, nsep, sess_list); 740 nsep->sess_clp = clp; 741 NFSUNLOCKSESSION(shp); 742 NFSUNLOCKSTATE(); 743 } 744 } 745 } else if (clp->lc_flags & LCL_NEEDSCONFIRM) { 746 error = NFSERR_EXPIRED; 747 } 748 749 /* 750 * If called by the Renew Op, we must check the principal. 751 */ 752 if (!error && (opflags & CLOPS_RENEWOP)) { 753 if (nfsrv_notsamecredname(nd, clp)) { 754 doneok = 0; 755 for (i = 0; i < nfsrv_statehashsize && doneok == 0; i++) { 756 LIST_FOREACH(stp, &clp->lc_stateid[i], ls_hash) { 757 if ((stp->ls_flags & NFSLCK_OPEN) && 758 stp->ls_uid == nd->nd_cred->cr_uid) { 759 doneok = 1; 760 break; 761 } 762 } 763 } 764 if (!doneok) 765 error = NFSERR_ACCES; 766 } 767 if (!error && (clp->lc_flags & LCL_CBDOWN)) 768 error = NFSERR_CBPATHDOWN; 769 } 770 if ((!error || error == NFSERR_CBPATHDOWN) && 771 (opflags & CLOPS_RENEW)) { 772 clp->lc_expiry = nfsrv_leaseexpiry(); 773 } 774 if (opflags & CLOPS_CONFIRM) { 775 NFSLOCKV4ROOTMUTEX(); 776 nfsv4_unlock(&nfsv4rootfs_lock, 1); 777 NFSUNLOCKV4ROOTMUTEX(); 778 } else if (opflags != CLOPS_RENEW) { 779 NFSUNLOCKSTATE(); 780 } 781 if (clpp) 782 *clpp = clp; 783 784 out: 785 NFSEXITCODE2(error, nd); 786 return (error); 787 } 788 789 /* 790 * Perform the NFSv4.1 destroy clientid. 791 */ 792 int 793 nfsrv_destroyclient(nfsquad_t clientid, NFSPROC_T *p) 794 { 795 struct nfsclient *clp; 796 struct nfsclienthashhead *hp; 797 int error = 0, i, igotlock; 798 799 if (nfsrvboottime != clientid.lval[0]) { 800 error = NFSERR_STALECLIENTID; 801 goto out; 802 } 803 804 /* Lock out other nfsd threads */ 805 NFSLOCKV4ROOTMUTEX(); 806 nfsv4_relref(&nfsv4rootfs_lock); 807 do { 808 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 809 NFSV4ROOTLOCKMUTEXPTR, NULL); 810 } while (igotlock == 0); 811 NFSUNLOCKV4ROOTMUTEX(); 812 813 hp = NFSCLIENTHASH(clientid); 814 LIST_FOREACH(clp, hp, lc_hash) { 815 if (clp->lc_clientid.lval[1] == clientid.lval[1]) 816 break; 817 } 818 if (clp == NULL) { 819 NFSLOCKV4ROOTMUTEX(); 820 nfsv4_unlock(&nfsv4rootfs_lock, 1); 821 NFSUNLOCKV4ROOTMUTEX(); 822 /* Just return ok, since it is gone. */ 823 goto out; 824 } 825 826 /* 827 * Free up all layouts on the clientid. Should the client return the 828 * layouts? 829 */ 830 nfsrv_freelayoutlist(clientid); 831 832 /* Scan for state on the clientid. */ 833 for (i = 0; i < nfsrv_statehashsize; i++) 834 if (!LIST_EMPTY(&clp->lc_stateid[i])) { 835 NFSLOCKV4ROOTMUTEX(); 836 nfsv4_unlock(&nfsv4rootfs_lock, 1); 837 NFSUNLOCKV4ROOTMUTEX(); 838 error = NFSERR_CLIENTIDBUSY; 839 goto out; 840 } 841 if (!LIST_EMPTY(&clp->lc_session) || !LIST_EMPTY(&clp->lc_deleg)) { 842 NFSLOCKV4ROOTMUTEX(); 843 nfsv4_unlock(&nfsv4rootfs_lock, 1); 844 NFSUNLOCKV4ROOTMUTEX(); 845 error = NFSERR_CLIENTIDBUSY; 846 goto out; 847 } 848 849 /* Destroy the clientid and return ok. */ 850 nfsrv_cleanclient(clp, p); 851 nfsrv_freedeleglist(&clp->lc_deleg); 852 nfsrv_freedeleglist(&clp->lc_olddeleg); 853 LIST_REMOVE(clp, lc_hash); 854 NFSLOCKV4ROOTMUTEX(); 855 nfsv4_unlock(&nfsv4rootfs_lock, 1); 856 NFSUNLOCKV4ROOTMUTEX(); 857 nfsrv_zapclient(clp, p); 858 out: 859 NFSEXITCODE2(error, nd); 860 return (error); 861 } 862 863 /* 864 * Called from the new nfssvc syscall to admin revoke a clientid. 865 * Returns 0 for success, error otherwise. 866 */ 867 int 868 nfsrv_adminrevoke(struct nfsd_clid *revokep, NFSPROC_T *p) 869 { 870 struct nfsclient *clp = NULL; 871 int i, error = 0; 872 int gotit, igotlock; 873 874 /* 875 * First, lock out the nfsd so that state won't change while the 876 * revocation record is being written to the stable storage restart 877 * file. 878 */ 879 NFSLOCKV4ROOTMUTEX(); 880 do { 881 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 882 NFSV4ROOTLOCKMUTEXPTR, NULL); 883 } while (!igotlock); 884 NFSUNLOCKV4ROOTMUTEX(); 885 886 /* 887 * Search for a match in the client list. 888 */ 889 gotit = i = 0; 890 while (i < nfsrv_clienthashsize && !gotit) { 891 LIST_FOREACH(clp, &nfsclienthash[i], lc_hash) { 892 if (revokep->nclid_idlen == clp->lc_idlen && 893 !NFSBCMP(revokep->nclid_id, clp->lc_id, clp->lc_idlen)) { 894 gotit = 1; 895 break; 896 } 897 } 898 i++; 899 } 900 if (!gotit) { 901 NFSLOCKV4ROOTMUTEX(); 902 nfsv4_unlock(&nfsv4rootfs_lock, 0); 903 NFSUNLOCKV4ROOTMUTEX(); 904 error = EPERM; 905 goto out; 906 } 907 908 /* 909 * Now, write out the revocation record 910 */ 911 nfsrv_writestable(clp->lc_id, clp->lc_idlen, NFSNST_REVOKE, p); 912 nfsrv_backupstable(); 913 914 /* 915 * and clear out the state, marking the clientid revoked. 916 */ 917 clp->lc_flags &= ~LCL_CALLBACKSON; 918 clp->lc_flags |= LCL_ADMINREVOKED; 919 nfsrv_cleanclient(clp, p); 920 nfsrv_freedeleglist(&clp->lc_deleg); 921 nfsrv_freedeleglist(&clp->lc_olddeleg); 922 NFSLOCKV4ROOTMUTEX(); 923 nfsv4_unlock(&nfsv4rootfs_lock, 0); 924 NFSUNLOCKV4ROOTMUTEX(); 925 926 out: 927 NFSEXITCODE(error); 928 return (error); 929 } 930 931 /* 932 * Dump out stats for all clients. Called from nfssvc(2), that is used 933 * nfsstatsv1. 934 */ 935 void 936 nfsrv_dumpclients(struct nfsd_dumpclients *dumpp, int maxcnt) 937 { 938 struct nfsclient *clp; 939 int i = 0, cnt = 0; 940 941 /* 942 * First, get a reference on the nfsv4rootfs_lock so that an 943 * exclusive lock cannot be acquired while dumping the clients. 944 */ 945 NFSLOCKV4ROOTMUTEX(); 946 nfsv4_getref(&nfsv4rootfs_lock, NULL, NFSV4ROOTLOCKMUTEXPTR, NULL); 947 NFSUNLOCKV4ROOTMUTEX(); 948 NFSLOCKSTATE(); 949 /* 950 * Rattle through the client lists until done. 951 */ 952 while (i < nfsrv_clienthashsize && cnt < maxcnt) { 953 clp = LIST_FIRST(&nfsclienthash[i]); 954 while (clp != LIST_END(&nfsclienthash[i]) && cnt < maxcnt) { 955 nfsrv_dumpaclient(clp, &dumpp[cnt]); 956 cnt++; 957 clp = LIST_NEXT(clp, lc_hash); 958 } 959 i++; 960 } 961 if (cnt < maxcnt) 962 dumpp[cnt].ndcl_clid.nclid_idlen = 0; 963 NFSUNLOCKSTATE(); 964 NFSLOCKV4ROOTMUTEX(); 965 nfsv4_relref(&nfsv4rootfs_lock); 966 NFSUNLOCKV4ROOTMUTEX(); 967 } 968 969 /* 970 * Dump stats for a client. Must be called with the NFSSTATELOCK and spl'd. 971 */ 972 static void 973 nfsrv_dumpaclient(struct nfsclient *clp, struct nfsd_dumpclients *dumpp) 974 { 975 struct nfsstate *stp, *openstp, *lckownstp; 976 struct nfslock *lop; 977 sa_family_t af; 978 #ifdef INET 979 struct sockaddr_in *rin; 980 #endif 981 #ifdef INET6 982 struct sockaddr_in6 *rin6; 983 #endif 984 985 dumpp->ndcl_nopenowners = dumpp->ndcl_nlockowners = 0; 986 dumpp->ndcl_nopens = dumpp->ndcl_nlocks = 0; 987 dumpp->ndcl_ndelegs = dumpp->ndcl_nolddelegs = 0; 988 dumpp->ndcl_flags = clp->lc_flags; 989 dumpp->ndcl_clid.nclid_idlen = clp->lc_idlen; 990 NFSBCOPY(clp->lc_id, dumpp->ndcl_clid.nclid_id, clp->lc_idlen); 991 af = clp->lc_req.nr_nam->sa_family; 992 dumpp->ndcl_addrfam = af; 993 switch (af) { 994 #ifdef INET 995 case AF_INET: 996 rin = (struct sockaddr_in *)clp->lc_req.nr_nam; 997 dumpp->ndcl_cbaddr.sin_addr = rin->sin_addr; 998 break; 999 #endif 1000 #ifdef INET6 1001 case AF_INET6: 1002 rin6 = (struct sockaddr_in6 *)clp->lc_req.nr_nam; 1003 dumpp->ndcl_cbaddr.sin6_addr = rin6->sin6_addr; 1004 break; 1005 #endif 1006 } 1007 1008 /* 1009 * Now, scan the state lists and total up the opens and locks. 1010 */ 1011 LIST_FOREACH(stp, &clp->lc_open, ls_list) { 1012 dumpp->ndcl_nopenowners++; 1013 LIST_FOREACH(openstp, &stp->ls_open, ls_list) { 1014 dumpp->ndcl_nopens++; 1015 LIST_FOREACH(lckownstp, &openstp->ls_open, ls_list) { 1016 dumpp->ndcl_nlockowners++; 1017 LIST_FOREACH(lop, &lckownstp->ls_lock, lo_lckowner) { 1018 dumpp->ndcl_nlocks++; 1019 } 1020 } 1021 } 1022 } 1023 1024 /* 1025 * and the delegation lists. 1026 */ 1027 LIST_FOREACH(stp, &clp->lc_deleg, ls_list) { 1028 dumpp->ndcl_ndelegs++; 1029 } 1030 LIST_FOREACH(stp, &clp->lc_olddeleg, ls_list) { 1031 dumpp->ndcl_nolddelegs++; 1032 } 1033 } 1034 1035 /* 1036 * Dump out lock stats for a file. 1037 */ 1038 void 1039 nfsrv_dumplocks(vnode_t vp, struct nfsd_dumplocks *ldumpp, int maxcnt, 1040 NFSPROC_T *p) 1041 { 1042 struct nfsstate *stp; 1043 struct nfslock *lop; 1044 int cnt = 0; 1045 struct nfslockfile *lfp; 1046 sa_family_t af; 1047 #ifdef INET 1048 struct sockaddr_in *rin; 1049 #endif 1050 #ifdef INET6 1051 struct sockaddr_in6 *rin6; 1052 #endif 1053 int ret; 1054 fhandle_t nfh; 1055 1056 ret = nfsrv_getlockfh(vp, 0, NULL, &nfh, p); 1057 /* 1058 * First, get a reference on the nfsv4rootfs_lock so that an 1059 * exclusive lock on it cannot be acquired while dumping the locks. 1060 */ 1061 NFSLOCKV4ROOTMUTEX(); 1062 nfsv4_getref(&nfsv4rootfs_lock, NULL, NFSV4ROOTLOCKMUTEXPTR, NULL); 1063 NFSUNLOCKV4ROOTMUTEX(); 1064 NFSLOCKSTATE(); 1065 if (!ret) 1066 ret = nfsrv_getlockfile(0, NULL, &lfp, &nfh, 0); 1067 if (ret) { 1068 ldumpp[0].ndlck_clid.nclid_idlen = 0; 1069 NFSUNLOCKSTATE(); 1070 NFSLOCKV4ROOTMUTEX(); 1071 nfsv4_relref(&nfsv4rootfs_lock); 1072 NFSUNLOCKV4ROOTMUTEX(); 1073 return; 1074 } 1075 1076 /* 1077 * For each open share on file, dump it out. 1078 */ 1079 stp = LIST_FIRST(&lfp->lf_open); 1080 while (stp != LIST_END(&lfp->lf_open) && cnt < maxcnt) { 1081 ldumpp[cnt].ndlck_flags = stp->ls_flags; 1082 ldumpp[cnt].ndlck_stateid.seqid = stp->ls_stateid.seqid; 1083 ldumpp[cnt].ndlck_stateid.other[0] = stp->ls_stateid.other[0]; 1084 ldumpp[cnt].ndlck_stateid.other[1] = stp->ls_stateid.other[1]; 1085 ldumpp[cnt].ndlck_stateid.other[2] = stp->ls_stateid.other[2]; 1086 ldumpp[cnt].ndlck_owner.nclid_idlen = 1087 stp->ls_openowner->ls_ownerlen; 1088 NFSBCOPY(stp->ls_openowner->ls_owner, 1089 ldumpp[cnt].ndlck_owner.nclid_id, 1090 stp->ls_openowner->ls_ownerlen); 1091 ldumpp[cnt].ndlck_clid.nclid_idlen = stp->ls_clp->lc_idlen; 1092 NFSBCOPY(stp->ls_clp->lc_id, ldumpp[cnt].ndlck_clid.nclid_id, 1093 stp->ls_clp->lc_idlen); 1094 af = stp->ls_clp->lc_req.nr_nam->sa_family; 1095 ldumpp[cnt].ndlck_addrfam = af; 1096 switch (af) { 1097 #ifdef INET 1098 case AF_INET: 1099 rin = (struct sockaddr_in *)stp->ls_clp->lc_req.nr_nam; 1100 ldumpp[cnt].ndlck_cbaddr.sin_addr = rin->sin_addr; 1101 break; 1102 #endif 1103 #ifdef INET6 1104 case AF_INET6: 1105 rin6 = (struct sockaddr_in6 *) 1106 stp->ls_clp->lc_req.nr_nam; 1107 ldumpp[cnt].ndlck_cbaddr.sin6_addr = rin6->sin6_addr; 1108 break; 1109 #endif 1110 } 1111 stp = LIST_NEXT(stp, ls_file); 1112 cnt++; 1113 } 1114 1115 /* 1116 * and all locks. 1117 */ 1118 lop = LIST_FIRST(&lfp->lf_lock); 1119 while (lop != LIST_END(&lfp->lf_lock) && cnt < maxcnt) { 1120 stp = lop->lo_stp; 1121 ldumpp[cnt].ndlck_flags = lop->lo_flags; 1122 ldumpp[cnt].ndlck_first = lop->lo_first; 1123 ldumpp[cnt].ndlck_end = lop->lo_end; 1124 ldumpp[cnt].ndlck_stateid.seqid = stp->ls_stateid.seqid; 1125 ldumpp[cnt].ndlck_stateid.other[0] = stp->ls_stateid.other[0]; 1126 ldumpp[cnt].ndlck_stateid.other[1] = stp->ls_stateid.other[1]; 1127 ldumpp[cnt].ndlck_stateid.other[2] = stp->ls_stateid.other[2]; 1128 ldumpp[cnt].ndlck_owner.nclid_idlen = stp->ls_ownerlen; 1129 NFSBCOPY(stp->ls_owner, ldumpp[cnt].ndlck_owner.nclid_id, 1130 stp->ls_ownerlen); 1131 ldumpp[cnt].ndlck_clid.nclid_idlen = stp->ls_clp->lc_idlen; 1132 NFSBCOPY(stp->ls_clp->lc_id, ldumpp[cnt].ndlck_clid.nclid_id, 1133 stp->ls_clp->lc_idlen); 1134 af = stp->ls_clp->lc_req.nr_nam->sa_family; 1135 ldumpp[cnt].ndlck_addrfam = af; 1136 switch (af) { 1137 #ifdef INET 1138 case AF_INET: 1139 rin = (struct sockaddr_in *)stp->ls_clp->lc_req.nr_nam; 1140 ldumpp[cnt].ndlck_cbaddr.sin_addr = rin->sin_addr; 1141 break; 1142 #endif 1143 #ifdef INET6 1144 case AF_INET6: 1145 rin6 = (struct sockaddr_in6 *) 1146 stp->ls_clp->lc_req.nr_nam; 1147 ldumpp[cnt].ndlck_cbaddr.sin6_addr = rin6->sin6_addr; 1148 break; 1149 #endif 1150 } 1151 lop = LIST_NEXT(lop, lo_lckfile); 1152 cnt++; 1153 } 1154 1155 /* 1156 * and the delegations. 1157 */ 1158 stp = LIST_FIRST(&lfp->lf_deleg); 1159 while (stp != LIST_END(&lfp->lf_deleg) && cnt < maxcnt) { 1160 ldumpp[cnt].ndlck_flags = stp->ls_flags; 1161 ldumpp[cnt].ndlck_stateid.seqid = stp->ls_stateid.seqid; 1162 ldumpp[cnt].ndlck_stateid.other[0] = stp->ls_stateid.other[0]; 1163 ldumpp[cnt].ndlck_stateid.other[1] = stp->ls_stateid.other[1]; 1164 ldumpp[cnt].ndlck_stateid.other[2] = stp->ls_stateid.other[2]; 1165 ldumpp[cnt].ndlck_owner.nclid_idlen = 0; 1166 ldumpp[cnt].ndlck_clid.nclid_idlen = stp->ls_clp->lc_idlen; 1167 NFSBCOPY(stp->ls_clp->lc_id, ldumpp[cnt].ndlck_clid.nclid_id, 1168 stp->ls_clp->lc_idlen); 1169 af = stp->ls_clp->lc_req.nr_nam->sa_family; 1170 ldumpp[cnt].ndlck_addrfam = af; 1171 switch (af) { 1172 #ifdef INET 1173 case AF_INET: 1174 rin = (struct sockaddr_in *)stp->ls_clp->lc_req.nr_nam; 1175 ldumpp[cnt].ndlck_cbaddr.sin_addr = rin->sin_addr; 1176 break; 1177 #endif 1178 #ifdef INET6 1179 case AF_INET6: 1180 rin6 = (struct sockaddr_in6 *) 1181 stp->ls_clp->lc_req.nr_nam; 1182 ldumpp[cnt].ndlck_cbaddr.sin6_addr = rin6->sin6_addr; 1183 break; 1184 #endif 1185 } 1186 stp = LIST_NEXT(stp, ls_file); 1187 cnt++; 1188 } 1189 1190 /* 1191 * If list isn't full, mark end of list by setting the client name 1192 * to zero length. 1193 */ 1194 if (cnt < maxcnt) 1195 ldumpp[cnt].ndlck_clid.nclid_idlen = 0; 1196 NFSUNLOCKSTATE(); 1197 NFSLOCKV4ROOTMUTEX(); 1198 nfsv4_relref(&nfsv4rootfs_lock); 1199 NFSUNLOCKV4ROOTMUTEX(); 1200 } 1201 1202 /* 1203 * Server timer routine. It can scan any linked list, so long 1204 * as it holds the spin/mutex lock and there is no exclusive lock on 1205 * nfsv4rootfs_lock. 1206 * (For OpenBSD, a kthread is ok. For FreeBSD, I think it is ok 1207 * to do this from a callout, since the spin locks work. For 1208 * Darwin, I'm not sure what will work correctly yet.) 1209 * Should be called once per second. 1210 */ 1211 void 1212 nfsrv_servertimer(void) 1213 { 1214 struct nfsclient *clp, *nclp; 1215 struct nfsstate *stp, *nstp; 1216 int got_ref, i; 1217 1218 /* 1219 * Make sure nfsboottime is set. This is used by V3 as well 1220 * as V4. Note that nfsboottime is not nfsrvboottime, which is 1221 * only used by the V4 server for leases. 1222 */ 1223 if (nfsboottime.tv_sec == 0) 1224 NFSSETBOOTTIME(nfsboottime); 1225 1226 /* 1227 * If server hasn't started yet, just return. 1228 */ 1229 NFSLOCKSTATE(); 1230 if (nfsrv_stablefirst.nsf_eograce == 0) { 1231 NFSUNLOCKSTATE(); 1232 return; 1233 } 1234 if (!(nfsrv_stablefirst.nsf_flags & NFSNSF_UPDATEDONE)) { 1235 if (!(nfsrv_stablefirst.nsf_flags & NFSNSF_GRACEOVER) && 1236 NFSD_MONOSEC > nfsrv_stablefirst.nsf_eograce) 1237 nfsrv_stablefirst.nsf_flags |= 1238 (NFSNSF_GRACEOVER | NFSNSF_NEEDLOCK); 1239 NFSUNLOCKSTATE(); 1240 return; 1241 } 1242 1243 /* 1244 * Try and get a reference count on the nfsv4rootfs_lock so that 1245 * no nfsd thread can acquire an exclusive lock on it before this 1246 * call is done. If it is already exclusively locked, just return. 1247 */ 1248 NFSLOCKV4ROOTMUTEX(); 1249 got_ref = nfsv4_getref_nonblock(&nfsv4rootfs_lock); 1250 NFSUNLOCKV4ROOTMUTEX(); 1251 if (got_ref == 0) { 1252 NFSUNLOCKSTATE(); 1253 return; 1254 } 1255 1256 /* 1257 * For each client... 1258 */ 1259 for (i = 0; i < nfsrv_clienthashsize; i++) { 1260 clp = LIST_FIRST(&nfsclienthash[i]); 1261 while (clp != LIST_END(&nfsclienthash[i])) { 1262 nclp = LIST_NEXT(clp, lc_hash); 1263 if (!(clp->lc_flags & LCL_EXPIREIT)) { 1264 if (((clp->lc_expiry + NFSRV_STALELEASE) < NFSD_MONOSEC 1265 && ((LIST_EMPTY(&clp->lc_deleg) 1266 && LIST_EMPTY(&clp->lc_open)) || 1267 nfsrv_clients > nfsrv_clienthighwater)) || 1268 (clp->lc_expiry + NFSRV_MOULDYLEASE) < NFSD_MONOSEC || 1269 (clp->lc_expiry < NFSD_MONOSEC && 1270 (nfsrv_openpluslock * 10 / 9) > nfsrv_v4statelimit)) { 1271 /* 1272 * Lease has expired several nfsrv_lease times ago: 1273 * PLUS 1274 * - no state is associated with it 1275 * OR 1276 * - above high water mark for number of clients 1277 * (nfsrv_clienthighwater should be large enough 1278 * that this only occurs when clients fail to 1279 * use the same nfs_client_id4.id. Maybe somewhat 1280 * higher that the maximum number of clients that 1281 * will mount this server?) 1282 * OR 1283 * Lease has expired a very long time ago 1284 * OR 1285 * Lease has expired PLUS the number of opens + locks 1286 * has exceeded 90% of capacity 1287 * 1288 * --> Mark for expiry. The actual expiry will be done 1289 * by an nfsd sometime soon. 1290 */ 1291 clp->lc_flags |= LCL_EXPIREIT; 1292 nfsrv_stablefirst.nsf_flags |= 1293 (NFSNSF_NEEDLOCK | NFSNSF_EXPIREDCLIENT); 1294 } else { 1295 /* 1296 * If there are no opens, increment no open tick cnt 1297 * If time exceeds NFSNOOPEN, mark it to be thrown away 1298 * otherwise, if there is an open, reset no open time 1299 * Hopefully, this will avoid excessive re-creation 1300 * of open owners and subsequent open confirms. 1301 */ 1302 stp = LIST_FIRST(&clp->lc_open); 1303 while (stp != LIST_END(&clp->lc_open)) { 1304 nstp = LIST_NEXT(stp, ls_list); 1305 if (LIST_EMPTY(&stp->ls_open)) { 1306 stp->ls_noopens++; 1307 if (stp->ls_noopens > NFSNOOPEN || 1308 (nfsrv_openpluslock * 2) > 1309 nfsrv_v4statelimit) 1310 nfsrv_stablefirst.nsf_flags |= 1311 NFSNSF_NOOPENS; 1312 } else { 1313 stp->ls_noopens = 0; 1314 } 1315 stp = nstp; 1316 } 1317 } 1318 } 1319 clp = nclp; 1320 } 1321 } 1322 NFSUNLOCKSTATE(); 1323 NFSLOCKV4ROOTMUTEX(); 1324 nfsv4_relref(&nfsv4rootfs_lock); 1325 NFSUNLOCKV4ROOTMUTEX(); 1326 } 1327 1328 /* 1329 * The following set of functions free up the various data structures. 1330 */ 1331 /* 1332 * Clear out all open/lock state related to this nfsclient. 1333 * Caller must hold an exclusive lock on nfsv4rootfs_lock, so that 1334 * there are no other active nfsd threads. 1335 */ 1336 void 1337 nfsrv_cleanclient(struct nfsclient *clp, NFSPROC_T *p) 1338 { 1339 struct nfsstate *stp, *nstp; 1340 struct nfsdsession *sep, *nsep; 1341 1342 LIST_FOREACH_SAFE(stp, &clp->lc_open, ls_list, nstp) 1343 nfsrv_freeopenowner(stp, 1, p); 1344 if ((clp->lc_flags & LCL_ADMINREVOKED) == 0) 1345 LIST_FOREACH_SAFE(sep, &clp->lc_session, sess_list, nsep) 1346 (void)nfsrv_freesession(sep, NULL); 1347 } 1348 1349 /* 1350 * Free a client that has been cleaned. It should also already have been 1351 * removed from the lists. 1352 * (Just to be safe w.r.t. newnfs_disconnect(), call this function when 1353 * softclock interrupts are enabled.) 1354 */ 1355 void 1356 nfsrv_zapclient(struct nfsclient *clp, NFSPROC_T *p) 1357 { 1358 1359 #ifdef notyet 1360 if ((clp->lc_flags & (LCL_GSS | LCL_CALLBACKSON)) == 1361 (LCL_GSS | LCL_CALLBACKSON) && 1362 (clp->lc_hand.nfsh_flag & NFSG_COMPLETE) && 1363 clp->lc_handlelen > 0) { 1364 clp->lc_hand.nfsh_flag &= ~NFSG_COMPLETE; 1365 clp->lc_hand.nfsh_flag |= NFSG_DESTROYED; 1366 (void) nfsrv_docallback(clp, NFSV4PROC_CBNULL, 1367 NULL, 0, NULL, NULL, NULL, 0, p); 1368 } 1369 #endif 1370 newnfs_disconnect(&clp->lc_req); 1371 free(clp->lc_req.nr_nam, M_SONAME); 1372 NFSFREEMUTEX(&clp->lc_req.nr_mtx); 1373 free(clp->lc_stateid, M_NFSDCLIENT); 1374 free(clp, M_NFSDCLIENT); 1375 NFSLOCKSTATE(); 1376 nfsstatsv1.srvclients--; 1377 nfsrv_openpluslock--; 1378 nfsrv_clients--; 1379 NFSUNLOCKSTATE(); 1380 } 1381 1382 /* 1383 * Free a list of delegation state structures. 1384 * (This function will also free all nfslockfile structures that no 1385 * longer have associated state.) 1386 */ 1387 void 1388 nfsrv_freedeleglist(struct nfsstatehead *sthp) 1389 { 1390 struct nfsstate *stp, *nstp; 1391 1392 LIST_FOREACH_SAFE(stp, sthp, ls_list, nstp) { 1393 nfsrv_freedeleg(stp); 1394 } 1395 LIST_INIT(sthp); 1396 } 1397 1398 /* 1399 * Free up a delegation. 1400 */ 1401 static void 1402 nfsrv_freedeleg(struct nfsstate *stp) 1403 { 1404 struct nfslockfile *lfp; 1405 1406 LIST_REMOVE(stp, ls_hash); 1407 LIST_REMOVE(stp, ls_list); 1408 LIST_REMOVE(stp, ls_file); 1409 if ((stp->ls_flags & NFSLCK_DELEGWRITE) != 0) 1410 nfsrv_writedelegcnt--; 1411 lfp = stp->ls_lfp; 1412 if (LIST_EMPTY(&lfp->lf_open) && 1413 LIST_EMPTY(&lfp->lf_lock) && LIST_EMPTY(&lfp->lf_deleg) && 1414 LIST_EMPTY(&lfp->lf_locallock) && LIST_EMPTY(&lfp->lf_rollback) && 1415 lfp->lf_usecount == 0 && 1416 nfsv4_testlock(&lfp->lf_locallock_lck) == 0) 1417 nfsrv_freenfslockfile(lfp); 1418 free(stp, M_NFSDSTATE); 1419 nfsstatsv1.srvdelegates--; 1420 nfsrv_openpluslock--; 1421 nfsrv_delegatecnt--; 1422 } 1423 1424 /* 1425 * This function frees an open owner and all associated opens. 1426 */ 1427 static void 1428 nfsrv_freeopenowner(struct nfsstate *stp, int cansleep, NFSPROC_T *p) 1429 { 1430 struct nfsstate *nstp, *tstp; 1431 1432 LIST_REMOVE(stp, ls_list); 1433 /* 1434 * Now, free all associated opens. 1435 */ 1436 nstp = LIST_FIRST(&stp->ls_open); 1437 while (nstp != LIST_END(&stp->ls_open)) { 1438 tstp = nstp; 1439 nstp = LIST_NEXT(nstp, ls_list); 1440 (void) nfsrv_freeopen(tstp, NULL, cansleep, p); 1441 } 1442 if (stp->ls_op) 1443 nfsrvd_derefcache(stp->ls_op); 1444 free(stp, M_NFSDSTATE); 1445 nfsstatsv1.srvopenowners--; 1446 nfsrv_openpluslock--; 1447 } 1448 1449 /* 1450 * This function frees an open (nfsstate open structure) with all associated 1451 * lock_owners and locks. It also frees the nfslockfile structure iff there 1452 * are no other opens on the file. 1453 * Returns 1 if it free'd the nfslockfile, 0 otherwise. 1454 */ 1455 static int 1456 nfsrv_freeopen(struct nfsstate *stp, vnode_t vp, int cansleep, NFSPROC_T *p) 1457 { 1458 struct nfsstate *nstp, *tstp; 1459 struct nfslockfile *lfp; 1460 int ret; 1461 1462 LIST_REMOVE(stp, ls_hash); 1463 LIST_REMOVE(stp, ls_list); 1464 LIST_REMOVE(stp, ls_file); 1465 1466 lfp = stp->ls_lfp; 1467 /* 1468 * Now, free all lockowners associated with this open. 1469 */ 1470 LIST_FOREACH_SAFE(tstp, &stp->ls_open, ls_list, nstp) 1471 nfsrv_freelockowner(tstp, vp, cansleep, p); 1472 1473 /* 1474 * The nfslockfile is freed here if there are no locks 1475 * associated with the open. 1476 * If there are locks associated with the open, the 1477 * nfslockfile structure can be freed via nfsrv_freelockowner(). 1478 * Acquire the state mutex to avoid races with calls to 1479 * nfsrv_getlockfile(). 1480 */ 1481 if (cansleep != 0) 1482 NFSLOCKSTATE(); 1483 if (lfp != NULL && LIST_EMPTY(&lfp->lf_open) && 1484 LIST_EMPTY(&lfp->lf_deleg) && LIST_EMPTY(&lfp->lf_lock) && 1485 LIST_EMPTY(&lfp->lf_locallock) && LIST_EMPTY(&lfp->lf_rollback) && 1486 lfp->lf_usecount == 0 && 1487 (cansleep != 0 || nfsv4_testlock(&lfp->lf_locallock_lck) == 0)) { 1488 nfsrv_freenfslockfile(lfp); 1489 ret = 1; 1490 } else 1491 ret = 0; 1492 if (cansleep != 0) 1493 NFSUNLOCKSTATE(); 1494 free(stp, M_NFSDSTATE); 1495 nfsstatsv1.srvopens--; 1496 nfsrv_openpluslock--; 1497 return (ret); 1498 } 1499 1500 /* 1501 * Frees a lockowner and all associated locks. 1502 */ 1503 static void 1504 nfsrv_freelockowner(struct nfsstate *stp, vnode_t vp, int cansleep, 1505 NFSPROC_T *p) 1506 { 1507 1508 LIST_REMOVE(stp, ls_hash); 1509 LIST_REMOVE(stp, ls_list); 1510 nfsrv_freeallnfslocks(stp, vp, cansleep, p); 1511 if (stp->ls_op) 1512 nfsrvd_derefcache(stp->ls_op); 1513 free(stp, M_NFSDSTATE); 1514 nfsstatsv1.srvlockowners--; 1515 nfsrv_openpluslock--; 1516 } 1517 1518 /* 1519 * Free all the nfs locks on a lockowner. 1520 */ 1521 static void 1522 nfsrv_freeallnfslocks(struct nfsstate *stp, vnode_t vp, int cansleep, 1523 NFSPROC_T *p) 1524 { 1525 struct nfslock *lop, *nlop; 1526 struct nfsrollback *rlp, *nrlp; 1527 struct nfslockfile *lfp = NULL; 1528 int gottvp = 0; 1529 vnode_t tvp = NULL; 1530 uint64_t first, end; 1531 1532 if (vp != NULL) 1533 ASSERT_VOP_UNLOCKED(vp, "nfsrv_freeallnfslocks: vnode locked"); 1534 lop = LIST_FIRST(&stp->ls_lock); 1535 while (lop != LIST_END(&stp->ls_lock)) { 1536 nlop = LIST_NEXT(lop, lo_lckowner); 1537 /* 1538 * Since all locks should be for the same file, lfp should 1539 * not change. 1540 */ 1541 if (lfp == NULL) 1542 lfp = lop->lo_lfp; 1543 else if (lfp != lop->lo_lfp) 1544 panic("allnfslocks"); 1545 /* 1546 * If vp is NULL and cansleep != 0, a vnode must be acquired 1547 * from the file handle. This only occurs when called from 1548 * nfsrv_cleanclient(). 1549 */ 1550 if (gottvp == 0) { 1551 if (nfsrv_dolocallocks == 0) 1552 tvp = NULL; 1553 else if (vp == NULL && cansleep != 0) { 1554 tvp = nfsvno_getvp(&lfp->lf_fh); 1555 if (tvp != NULL) 1556 NFSVOPUNLOCK(tvp); 1557 } else 1558 tvp = vp; 1559 gottvp = 1; 1560 } 1561 1562 if (tvp != NULL) { 1563 if (cansleep == 0) 1564 panic("allnfs2"); 1565 first = lop->lo_first; 1566 end = lop->lo_end; 1567 nfsrv_freenfslock(lop); 1568 nfsrv_localunlock(tvp, lfp, first, end, p); 1569 LIST_FOREACH_SAFE(rlp, &lfp->lf_rollback, rlck_list, 1570 nrlp) 1571 free(rlp, M_NFSDROLLBACK); 1572 LIST_INIT(&lfp->lf_rollback); 1573 } else 1574 nfsrv_freenfslock(lop); 1575 lop = nlop; 1576 } 1577 if (vp == NULL && tvp != NULL) 1578 vrele(tvp); 1579 } 1580 1581 /* 1582 * Free an nfslock structure. 1583 */ 1584 static void 1585 nfsrv_freenfslock(struct nfslock *lop) 1586 { 1587 1588 if (lop->lo_lckfile.le_prev != NULL) { 1589 LIST_REMOVE(lop, lo_lckfile); 1590 nfsstatsv1.srvlocks--; 1591 nfsrv_openpluslock--; 1592 } 1593 LIST_REMOVE(lop, lo_lckowner); 1594 free(lop, M_NFSDLOCK); 1595 } 1596 1597 /* 1598 * This function frees an nfslockfile structure. 1599 */ 1600 static void 1601 nfsrv_freenfslockfile(struct nfslockfile *lfp) 1602 { 1603 1604 LIST_REMOVE(lfp, lf_hash); 1605 free(lfp, M_NFSDLOCKFILE); 1606 } 1607 1608 /* 1609 * This function looks up an nfsstate structure via stateid. 1610 */ 1611 static int 1612 nfsrv_getstate(struct nfsclient *clp, nfsv4stateid_t *stateidp, __unused u_int32_t flags, 1613 struct nfsstate **stpp) 1614 { 1615 struct nfsstate *stp; 1616 struct nfsstatehead *hp; 1617 int error = 0; 1618 1619 *stpp = NULL; 1620 hp = NFSSTATEHASH(clp, *stateidp); 1621 LIST_FOREACH(stp, hp, ls_hash) { 1622 if (!NFSBCMP(stp->ls_stateid.other, stateidp->other, 1623 NFSX_STATEIDOTHER)) 1624 break; 1625 } 1626 1627 /* 1628 * If no state id in list, return NFSERR_BADSTATEID. 1629 */ 1630 if (stp == LIST_END(hp)) { 1631 error = NFSERR_BADSTATEID; 1632 goto out; 1633 } 1634 *stpp = stp; 1635 1636 out: 1637 NFSEXITCODE(error); 1638 return (error); 1639 } 1640 1641 /* 1642 * This function gets an nfsstate structure via owner string. 1643 */ 1644 static void 1645 nfsrv_getowner(struct nfsstatehead *hp, struct nfsstate *new_stp, 1646 struct nfsstate **stpp) 1647 { 1648 struct nfsstate *stp; 1649 1650 *stpp = NULL; 1651 LIST_FOREACH(stp, hp, ls_list) { 1652 if (new_stp->ls_ownerlen == stp->ls_ownerlen && 1653 !NFSBCMP(new_stp->ls_owner,stp->ls_owner,stp->ls_ownerlen)) { 1654 *stpp = stp; 1655 return; 1656 } 1657 } 1658 } 1659 1660 /* 1661 * Lock control function called to update lock status. 1662 * Returns 0 upon success, -1 if there is no lock and the flags indicate 1663 * that one isn't to be created and an NFSERR_xxx for other errors. 1664 * The structures new_stp and new_lop are passed in as pointers that should 1665 * be set to NULL if the structure is used and shouldn't be free'd. 1666 * For the NFSLCK_TEST and NFSLCK_CHECK cases, the structures are 1667 * never used and can safely be allocated on the stack. For all other 1668 * cases, *new_stpp and *new_lopp should be malloc'd before the call, 1669 * in case they are used. 1670 */ 1671 int 1672 nfsrv_lockctrl(vnode_t vp, struct nfsstate **new_stpp, 1673 struct nfslock **new_lopp, struct nfslockconflict *cfp, 1674 nfsquad_t clientid, nfsv4stateid_t *stateidp, 1675 __unused struct nfsexstuff *exp, 1676 struct nfsrv_descript *nd, NFSPROC_T *p) 1677 { 1678 struct nfslock *lop; 1679 struct nfsstate *new_stp = *new_stpp; 1680 struct nfslock *new_lop = *new_lopp; 1681 struct nfsstate *tstp, *mystp, *nstp; 1682 int specialid = 0; 1683 struct nfslockfile *lfp; 1684 struct nfslock *other_lop = NULL; 1685 struct nfsstate *stp, *lckstp = NULL; 1686 struct nfsclient *clp = NULL; 1687 u_int32_t bits; 1688 int error = 0, haslock = 0, ret, reterr; 1689 int getlckret, delegation = 0, filestruct_locked, vnode_unlocked = 0; 1690 fhandle_t nfh; 1691 uint64_t first, end; 1692 uint32_t lock_flags; 1693 1694 if (new_stp->ls_flags & (NFSLCK_CHECK | NFSLCK_SETATTR)) { 1695 /* 1696 * Note the special cases of "all 1s" or "all 0s" stateids and 1697 * let reads with all 1s go ahead. 1698 */ 1699 if (new_stp->ls_stateid.seqid == 0x0 && 1700 new_stp->ls_stateid.other[0] == 0x0 && 1701 new_stp->ls_stateid.other[1] == 0x0 && 1702 new_stp->ls_stateid.other[2] == 0x0) 1703 specialid = 1; 1704 else if (new_stp->ls_stateid.seqid == 0xffffffff && 1705 new_stp->ls_stateid.other[0] == 0xffffffff && 1706 new_stp->ls_stateid.other[1] == 0xffffffff && 1707 new_stp->ls_stateid.other[2] == 0xffffffff) 1708 specialid = 2; 1709 } 1710 1711 /* 1712 * Check for restart conditions (client and server). 1713 */ 1714 error = nfsrv_checkrestart(clientid, new_stp->ls_flags, 1715 &new_stp->ls_stateid, specialid); 1716 if (error) 1717 goto out; 1718 1719 /* 1720 * Check for state resource limit exceeded. 1721 */ 1722 if ((new_stp->ls_flags & NFSLCK_LOCK) && 1723 nfsrv_openpluslock > nfsrv_v4statelimit) { 1724 error = NFSERR_RESOURCE; 1725 goto out; 1726 } 1727 1728 /* 1729 * For the lock case, get another nfslock structure, 1730 * just in case we need it. 1731 * Malloc now, before we start sifting through the linked lists, 1732 * in case we have to wait for memory. 1733 */ 1734 tryagain: 1735 if (new_stp->ls_flags & NFSLCK_LOCK) 1736 other_lop = malloc(sizeof (struct nfslock), 1737 M_NFSDLOCK, M_WAITOK); 1738 filestruct_locked = 0; 1739 reterr = 0; 1740 lfp = NULL; 1741 1742 /* 1743 * Get the lockfile structure for CFH now, so we can do a sanity 1744 * check against the stateid, before incrementing the seqid#, since 1745 * we want to return NFSERR_BADSTATEID on failure and the seqid# 1746 * shouldn't be incremented for this case. 1747 * If nfsrv_getlockfile() returns -1, it means "not found", which 1748 * will be handled later. 1749 * If we are doing Lock/LockU and local locking is enabled, sleep 1750 * lock the nfslockfile structure. 1751 */ 1752 getlckret = nfsrv_getlockfh(vp, new_stp->ls_flags, NULL, &nfh, p); 1753 NFSLOCKSTATE(); 1754 if (getlckret == 0) { 1755 if ((new_stp->ls_flags & (NFSLCK_LOCK | NFSLCK_UNLOCK)) != 0 && 1756 nfsrv_dolocallocks != 0 && nd->nd_repstat == 0) { 1757 getlckret = nfsrv_getlockfile(new_stp->ls_flags, NULL, 1758 &lfp, &nfh, 1); 1759 if (getlckret == 0) 1760 filestruct_locked = 1; 1761 } else 1762 getlckret = nfsrv_getlockfile(new_stp->ls_flags, NULL, 1763 &lfp, &nfh, 0); 1764 } 1765 if (getlckret != 0 && getlckret != -1) 1766 reterr = getlckret; 1767 1768 if (filestruct_locked != 0) { 1769 LIST_INIT(&lfp->lf_rollback); 1770 if ((new_stp->ls_flags & NFSLCK_LOCK)) { 1771 /* 1772 * For local locking, do the advisory locking now, so 1773 * that any conflict can be detected. A failure later 1774 * can be rolled back locally. If an error is returned, 1775 * struct nfslockfile has been unlocked and any local 1776 * locking rolled back. 1777 */ 1778 NFSUNLOCKSTATE(); 1779 if (vnode_unlocked == 0) { 1780 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl1"); 1781 vnode_unlocked = 1; 1782 NFSVOPUNLOCK(vp); 1783 } 1784 reterr = nfsrv_locallock(vp, lfp, 1785 (new_lop->lo_flags & (NFSLCK_READ | NFSLCK_WRITE)), 1786 new_lop->lo_first, new_lop->lo_end, cfp, p); 1787 NFSLOCKSTATE(); 1788 } 1789 } 1790 1791 if (specialid == 0) { 1792 if (new_stp->ls_flags & NFSLCK_TEST) { 1793 /* 1794 * RFC 3530 does not list LockT as an op that renews a 1795 * lease, but the consensus seems to be that it is ok 1796 * for a server to do so. 1797 */ 1798 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 1799 (nfsquad_t)((u_quad_t)0), 0, nd, p); 1800 1801 /* 1802 * Since NFSERR_EXPIRED, NFSERR_ADMINREVOKED are not valid 1803 * error returns for LockT, just go ahead and test for a lock, 1804 * since there are no locks for this client, but other locks 1805 * can conflict. (ie. same client will always be false) 1806 */ 1807 if (error == NFSERR_EXPIRED || error == NFSERR_ADMINREVOKED) 1808 error = 0; 1809 lckstp = new_stp; 1810 } else { 1811 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 1812 (nfsquad_t)((u_quad_t)0), 0, nd, p); 1813 if (error == 0) 1814 /* 1815 * Look up the stateid 1816 */ 1817 error = nfsrv_getstate(clp, &new_stp->ls_stateid, 1818 new_stp->ls_flags, &stp); 1819 /* 1820 * do some sanity checks for an unconfirmed open or a 1821 * stateid that refers to the wrong file, for an open stateid 1822 */ 1823 if (error == 0 && (stp->ls_flags & NFSLCK_OPEN) && 1824 ((stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM) || 1825 (getlckret == 0 && stp->ls_lfp != lfp))){ 1826 /* 1827 * NFSLCK_SETATTR should return OK rather than NFSERR_BADSTATEID 1828 * The only exception is using SETATTR with SIZE. 1829 * */ 1830 if ((new_stp->ls_flags & 1831 (NFSLCK_SETATTR | NFSLCK_CHECK)) != NFSLCK_SETATTR) 1832 error = NFSERR_BADSTATEID; 1833 } 1834 1835 if (error == 0 && 1836 (stp->ls_flags & (NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) && 1837 getlckret == 0 && stp->ls_lfp != lfp) 1838 error = NFSERR_BADSTATEID; 1839 1840 /* 1841 * If the lockowner stateid doesn't refer to the same file, 1842 * I believe that is considered ok, since some clients will 1843 * only create a single lockowner and use that for all locks 1844 * on all files. 1845 * For now, log it as a diagnostic, instead of considering it 1846 * a BadStateid. 1847 */ 1848 if (error == 0 && (stp->ls_flags & 1849 (NFSLCK_OPEN | NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) == 0 && 1850 getlckret == 0 && stp->ls_lfp != lfp) { 1851 #ifdef DIAGNOSTIC 1852 printf("Got a lock statid for different file open\n"); 1853 #endif 1854 /* 1855 error = NFSERR_BADSTATEID; 1856 */ 1857 } 1858 1859 if (error == 0) { 1860 if (new_stp->ls_flags & NFSLCK_OPENTOLOCK) { 1861 /* 1862 * If haslock set, we've already checked the seqid. 1863 */ 1864 if (!haslock) { 1865 if (stp->ls_flags & NFSLCK_OPEN) 1866 error = nfsrv_checkseqid(nd, new_stp->ls_seq, 1867 stp->ls_openowner, new_stp->ls_op); 1868 else 1869 error = NFSERR_BADSTATEID; 1870 } 1871 if (!error) 1872 nfsrv_getowner(&stp->ls_open, new_stp, &lckstp); 1873 if (lckstp) { 1874 /* 1875 * For NFSv4.1 and NFSv4.2 allow an 1876 * open_to_lock_owner when the lock_owner already 1877 * exists. Just clear NFSLCK_OPENTOLOCK so that 1878 * a new lock_owner will not be created. 1879 * RFC7530 states that the error for NFSv4.0 1880 * is NFS4ERR_BAD_SEQID. 1881 */ 1882 if ((nd->nd_flag & ND_NFSV41) != 0) 1883 new_stp->ls_flags &= ~NFSLCK_OPENTOLOCK; 1884 else 1885 error = NFSERR_BADSEQID; 1886 } else 1887 lckstp = new_stp; 1888 } else if (new_stp->ls_flags&(NFSLCK_LOCK|NFSLCK_UNLOCK)) { 1889 /* 1890 * If haslock set, ditto above. 1891 */ 1892 if (!haslock) { 1893 if (stp->ls_flags & NFSLCK_OPEN) 1894 error = NFSERR_BADSTATEID; 1895 else 1896 error = nfsrv_checkseqid(nd, new_stp->ls_seq, 1897 stp, new_stp->ls_op); 1898 } 1899 lckstp = stp; 1900 } else { 1901 lckstp = stp; 1902 } 1903 } 1904 /* 1905 * If the seqid part of the stateid isn't the same, return 1906 * NFSERR_OLDSTATEID for cases other than I/O Ops. 1907 * For I/O Ops, only return NFSERR_OLDSTATEID if 1908 * nfsrv_returnoldstateid is set. (The consensus on the email 1909 * list was that most clients would prefer to not receive 1910 * NFSERR_OLDSTATEID for I/O Ops, but the RFC suggests that that 1911 * is what will happen, so I use the nfsrv_returnoldstateid to 1912 * allow for either server configuration.) 1913 */ 1914 if (!error && stp->ls_stateid.seqid!=new_stp->ls_stateid.seqid && 1915 (((nd->nd_flag & ND_NFSV41) == 0 && 1916 (!(new_stp->ls_flags & NFSLCK_CHECK) || 1917 nfsrv_returnoldstateid)) || 1918 ((nd->nd_flag & ND_NFSV41) != 0 && 1919 new_stp->ls_stateid.seqid != 0))) 1920 error = NFSERR_OLDSTATEID; 1921 } 1922 } 1923 1924 /* 1925 * Now we can check for grace. 1926 */ 1927 if (!error) 1928 error = nfsrv_checkgrace(nd, clp, new_stp->ls_flags); 1929 if ((new_stp->ls_flags & NFSLCK_RECLAIM) && !error && 1930 nfsrv_checkstable(clp)) 1931 error = NFSERR_NOGRACE; 1932 /* 1933 * If we successfully Reclaimed state, note that. 1934 */ 1935 if ((new_stp->ls_flags & NFSLCK_RECLAIM) && !error) 1936 nfsrv_markstable(clp); 1937 1938 /* 1939 * At this point, either error == NFSERR_BADSTATEID or the 1940 * seqid# has been updated, so we can return any error. 1941 * If error == 0, there may be an error in: 1942 * nd_repstat - Set by the calling function. 1943 * reterr - Set above, if getting the nfslockfile structure 1944 * or acquiring the local lock failed. 1945 * (If both of these are set, nd_repstat should probably be 1946 * returned, since that error was detected before this 1947 * function call.) 1948 */ 1949 if (error != 0 || nd->nd_repstat != 0 || reterr != 0) { 1950 if (error == 0) { 1951 if (nd->nd_repstat != 0) 1952 error = nd->nd_repstat; 1953 else 1954 error = reterr; 1955 } 1956 if (filestruct_locked != 0) { 1957 /* Roll back local locks. */ 1958 NFSUNLOCKSTATE(); 1959 if (vnode_unlocked == 0) { 1960 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl2"); 1961 vnode_unlocked = 1; 1962 NFSVOPUNLOCK(vp); 1963 } 1964 nfsrv_locallock_rollback(vp, lfp, p); 1965 NFSLOCKSTATE(); 1966 nfsrv_unlocklf(lfp); 1967 } 1968 NFSUNLOCKSTATE(); 1969 goto out; 1970 } 1971 1972 /* 1973 * Check the nfsrv_getlockfile return. 1974 * Returned -1 if no structure found. 1975 */ 1976 if (getlckret == -1) { 1977 error = NFSERR_EXPIRED; 1978 /* 1979 * Called from lockt, so no lock is OK. 1980 */ 1981 if (new_stp->ls_flags & NFSLCK_TEST) { 1982 error = 0; 1983 } else if (new_stp->ls_flags & 1984 (NFSLCK_CHECK | NFSLCK_SETATTR)) { 1985 /* 1986 * Called to check for a lock, OK if the stateid is all 1987 * 1s or all 0s, but there should be an nfsstate 1988 * otherwise. 1989 * (ie. If there is no open, I'll assume no share 1990 * deny bits.) 1991 */ 1992 if (specialid) 1993 error = 0; 1994 else 1995 error = NFSERR_BADSTATEID; 1996 } 1997 NFSUNLOCKSTATE(); 1998 goto out; 1999 } 2000 2001 /* 2002 * For NFSLCK_CHECK and NFSLCK_LOCK, test for a share conflict. 2003 * For NFSLCK_CHECK, allow a read if write access is granted, 2004 * but check for a deny. For NFSLCK_LOCK, require correct access, 2005 * which implies a conflicting deny can't exist. 2006 */ 2007 if (new_stp->ls_flags & (NFSLCK_CHECK | NFSLCK_LOCK)) { 2008 /* 2009 * Four kinds of state id: 2010 * - specialid (all 0s or all 1s), only for NFSLCK_CHECK 2011 * - stateid for an open 2012 * - stateid for a delegation 2013 * - stateid for a lock owner 2014 */ 2015 if (!specialid) { 2016 if (stp->ls_flags & (NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) { 2017 delegation = 1; 2018 mystp = stp; 2019 nfsrv_delaydelegtimeout(stp); 2020 } else if (stp->ls_flags & NFSLCK_OPEN) { 2021 mystp = stp; 2022 } else { 2023 mystp = stp->ls_openstp; 2024 } 2025 /* 2026 * If locking or checking, require correct access 2027 * bit set. 2028 */ 2029 if (((new_stp->ls_flags & NFSLCK_LOCK) && 2030 !((new_lop->lo_flags >> NFSLCK_LOCKSHIFT) & 2031 mystp->ls_flags & NFSLCK_ACCESSBITS)) || 2032 ((new_stp->ls_flags & (NFSLCK_CHECK|NFSLCK_READACCESS)) == 2033 (NFSLCK_CHECK | NFSLCK_READACCESS) && 2034 !(mystp->ls_flags & NFSLCK_READACCESS) && 2035 nfsrv_allowreadforwriteopen == 0) || 2036 ((new_stp->ls_flags & (NFSLCK_CHECK|NFSLCK_WRITEACCESS)) == 2037 (NFSLCK_CHECK | NFSLCK_WRITEACCESS) && 2038 !(mystp->ls_flags & NFSLCK_WRITEACCESS))) { 2039 if (filestruct_locked != 0) { 2040 /* Roll back local locks. */ 2041 NFSUNLOCKSTATE(); 2042 if (vnode_unlocked == 0) { 2043 ASSERT_VOP_ELOCKED(vp, 2044 "nfsrv_lockctrl3"); 2045 vnode_unlocked = 1; 2046 NFSVOPUNLOCK(vp); 2047 } 2048 nfsrv_locallock_rollback(vp, lfp, p); 2049 NFSLOCKSTATE(); 2050 nfsrv_unlocklf(lfp); 2051 } 2052 NFSUNLOCKSTATE(); 2053 error = NFSERR_OPENMODE; 2054 goto out; 2055 } 2056 } else 2057 mystp = NULL; 2058 if ((new_stp->ls_flags & NFSLCK_CHECK) && !delegation) { 2059 /* 2060 * Check for a conflicting deny bit. 2061 */ 2062 LIST_FOREACH(tstp, &lfp->lf_open, ls_file) { 2063 if (tstp != mystp) { 2064 bits = tstp->ls_flags; 2065 bits >>= NFSLCK_SHIFT; 2066 if (new_stp->ls_flags & bits & NFSLCK_ACCESSBITS) { 2067 KASSERT(vnode_unlocked == 0, 2068 ("nfsrv_lockctrl: vnode unlocked1")); 2069 ret = nfsrv_clientconflict(tstp->ls_clp, &haslock, 2070 vp, p); 2071 if (ret == 1) { 2072 /* 2073 * nfsrv_clientconflict unlocks state 2074 * when it returns non-zero. 2075 */ 2076 lckstp = NULL; 2077 goto tryagain; 2078 } 2079 if (ret == 0) 2080 NFSUNLOCKSTATE(); 2081 if (ret == 2) 2082 error = NFSERR_PERM; 2083 else 2084 error = NFSERR_OPENMODE; 2085 goto out; 2086 } 2087 } 2088 } 2089 2090 /* We're outta here */ 2091 NFSUNLOCKSTATE(); 2092 goto out; 2093 } 2094 } 2095 2096 /* 2097 * For setattr, just get rid of all the Delegations for other clients. 2098 */ 2099 if (new_stp->ls_flags & NFSLCK_SETATTR) { 2100 KASSERT(vnode_unlocked == 0, 2101 ("nfsrv_lockctrl: vnode unlocked2")); 2102 ret = nfsrv_cleandeleg(vp, lfp, clp, &haslock, p); 2103 if (ret) { 2104 /* 2105 * nfsrv_cleandeleg() unlocks state when it 2106 * returns non-zero. 2107 */ 2108 if (ret == -1) { 2109 lckstp = NULL; 2110 goto tryagain; 2111 } 2112 error = ret; 2113 goto out; 2114 } 2115 if (!(new_stp->ls_flags & NFSLCK_CHECK) || 2116 (LIST_EMPTY(&lfp->lf_open) && LIST_EMPTY(&lfp->lf_lock) && 2117 LIST_EMPTY(&lfp->lf_deleg))) { 2118 NFSUNLOCKSTATE(); 2119 goto out; 2120 } 2121 } 2122 2123 /* 2124 * Check for a conflicting delegation. If one is found, call 2125 * nfsrv_delegconflict() to handle it. If the v4root lock hasn't 2126 * been set yet, it will get the lock. Otherwise, it will recall 2127 * the delegation. Then, we try try again... 2128 * I currently believe the conflict algorithm to be: 2129 * For Lock Ops (Lock/LockT/LockU) 2130 * - there is a conflict iff a different client has a write delegation 2131 * For Reading (Read Op) 2132 * - there is a conflict iff a different client has a write delegation 2133 * (the specialids are always a different client) 2134 * For Writing (Write/Setattr of size) 2135 * - there is a conflict if a different client has any delegation 2136 * - there is a conflict if the same client has a read delegation 2137 * (I don't understand why this isn't allowed, but that seems to be 2138 * the current consensus?) 2139 */ 2140 tstp = LIST_FIRST(&lfp->lf_deleg); 2141 while (tstp != LIST_END(&lfp->lf_deleg)) { 2142 nstp = LIST_NEXT(tstp, ls_file); 2143 if ((((new_stp->ls_flags&(NFSLCK_LOCK|NFSLCK_UNLOCK|NFSLCK_TEST))|| 2144 ((new_stp->ls_flags & NFSLCK_CHECK) && 2145 (new_lop->lo_flags & NFSLCK_READ))) && 2146 clp != tstp->ls_clp && 2147 (tstp->ls_flags & NFSLCK_DELEGWRITE)) || 2148 ((new_stp->ls_flags & NFSLCK_CHECK) && 2149 (new_lop->lo_flags & NFSLCK_WRITE) && 2150 (clp != tstp->ls_clp || 2151 (tstp->ls_flags & NFSLCK_DELEGREAD)))) { 2152 ret = 0; 2153 if (filestruct_locked != 0) { 2154 /* Roll back local locks. */ 2155 NFSUNLOCKSTATE(); 2156 if (vnode_unlocked == 0) { 2157 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl4"); 2158 NFSVOPUNLOCK(vp); 2159 } 2160 nfsrv_locallock_rollback(vp, lfp, p); 2161 NFSLOCKSTATE(); 2162 nfsrv_unlocklf(lfp); 2163 NFSUNLOCKSTATE(); 2164 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 2165 vnode_unlocked = 0; 2166 if (VN_IS_DOOMED(vp)) 2167 ret = NFSERR_SERVERFAULT; 2168 NFSLOCKSTATE(); 2169 } 2170 if (ret == 0) 2171 ret = nfsrv_delegconflict(tstp, &haslock, p, vp); 2172 if (ret) { 2173 /* 2174 * nfsrv_delegconflict unlocks state when it 2175 * returns non-zero, which it always does. 2176 */ 2177 if (other_lop) { 2178 free(other_lop, M_NFSDLOCK); 2179 other_lop = NULL; 2180 } 2181 if (ret == -1) { 2182 lckstp = NULL; 2183 goto tryagain; 2184 } 2185 error = ret; 2186 goto out; 2187 } 2188 /* Never gets here. */ 2189 } 2190 tstp = nstp; 2191 } 2192 2193 /* 2194 * Handle the unlock case by calling nfsrv_updatelock(). 2195 * (Should I have done some access checking above for unlock? For now, 2196 * just let it happen.) 2197 */ 2198 if (new_stp->ls_flags & NFSLCK_UNLOCK) { 2199 first = new_lop->lo_first; 2200 end = new_lop->lo_end; 2201 nfsrv_updatelock(stp, new_lopp, &other_lop, lfp); 2202 stateidp->seqid = ++(stp->ls_stateid.seqid); 2203 if ((nd->nd_flag & ND_NFSV41) != 0 && stateidp->seqid == 0) 2204 stateidp->seqid = stp->ls_stateid.seqid = 1; 2205 stateidp->other[0] = stp->ls_stateid.other[0]; 2206 stateidp->other[1] = stp->ls_stateid.other[1]; 2207 stateidp->other[2] = stp->ls_stateid.other[2]; 2208 if (filestruct_locked != 0) { 2209 NFSUNLOCKSTATE(); 2210 if (vnode_unlocked == 0) { 2211 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl5"); 2212 vnode_unlocked = 1; 2213 NFSVOPUNLOCK(vp); 2214 } 2215 /* Update the local locks. */ 2216 nfsrv_localunlock(vp, lfp, first, end, p); 2217 NFSLOCKSTATE(); 2218 nfsrv_unlocklf(lfp); 2219 } 2220 NFSUNLOCKSTATE(); 2221 goto out; 2222 } 2223 2224 /* 2225 * Search for a conflicting lock. A lock conflicts if: 2226 * - the lock range overlaps and 2227 * - at least one lock is a write lock and 2228 * - it is not owned by the same lock owner 2229 */ 2230 if (!delegation) { 2231 LIST_FOREACH(lop, &lfp->lf_lock, lo_lckfile) { 2232 if (new_lop->lo_end > lop->lo_first && 2233 new_lop->lo_first < lop->lo_end && 2234 (new_lop->lo_flags == NFSLCK_WRITE || 2235 lop->lo_flags == NFSLCK_WRITE) && 2236 lckstp != lop->lo_stp && 2237 (clp != lop->lo_stp->ls_clp || 2238 lckstp->ls_ownerlen != lop->lo_stp->ls_ownerlen || 2239 NFSBCMP(lckstp->ls_owner, lop->lo_stp->ls_owner, 2240 lckstp->ls_ownerlen))) { 2241 if (other_lop) { 2242 free(other_lop, M_NFSDLOCK); 2243 other_lop = NULL; 2244 } 2245 if (vnode_unlocked != 0) 2246 ret = nfsrv_clientconflict(lop->lo_stp->ls_clp, &haslock, 2247 NULL, p); 2248 else 2249 ret = nfsrv_clientconflict(lop->lo_stp->ls_clp, &haslock, 2250 vp, p); 2251 if (ret == 1) { 2252 if (filestruct_locked != 0) { 2253 if (vnode_unlocked == 0) { 2254 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl6"); 2255 NFSVOPUNLOCK(vp); 2256 } 2257 /* Roll back local locks. */ 2258 nfsrv_locallock_rollback(vp, lfp, p); 2259 NFSLOCKSTATE(); 2260 nfsrv_unlocklf(lfp); 2261 NFSUNLOCKSTATE(); 2262 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 2263 vnode_unlocked = 0; 2264 if (VN_IS_DOOMED(vp)) { 2265 error = NFSERR_SERVERFAULT; 2266 goto out; 2267 } 2268 } 2269 /* 2270 * nfsrv_clientconflict() unlocks state when it 2271 * returns non-zero. 2272 */ 2273 lckstp = NULL; 2274 goto tryagain; 2275 } 2276 /* 2277 * Found a conflicting lock, so record the conflict and 2278 * return the error. 2279 */ 2280 if (cfp != NULL && ret == 0) { 2281 cfp->cl_clientid.lval[0]=lop->lo_stp->ls_stateid.other[0]; 2282 cfp->cl_clientid.lval[1]=lop->lo_stp->ls_stateid.other[1]; 2283 cfp->cl_first = lop->lo_first; 2284 cfp->cl_end = lop->lo_end; 2285 cfp->cl_flags = lop->lo_flags; 2286 cfp->cl_ownerlen = lop->lo_stp->ls_ownerlen; 2287 NFSBCOPY(lop->lo_stp->ls_owner, cfp->cl_owner, 2288 cfp->cl_ownerlen); 2289 } 2290 if (ret == 2) 2291 error = NFSERR_PERM; 2292 else if (new_stp->ls_flags & NFSLCK_RECLAIM) 2293 error = NFSERR_RECLAIMCONFLICT; 2294 else if (new_stp->ls_flags & NFSLCK_CHECK) 2295 error = NFSERR_LOCKED; 2296 else 2297 error = NFSERR_DENIED; 2298 if (filestruct_locked != 0 && ret == 0) { 2299 /* Roll back local locks. */ 2300 NFSUNLOCKSTATE(); 2301 if (vnode_unlocked == 0) { 2302 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl7"); 2303 vnode_unlocked = 1; 2304 NFSVOPUNLOCK(vp); 2305 } 2306 nfsrv_locallock_rollback(vp, lfp, p); 2307 NFSLOCKSTATE(); 2308 nfsrv_unlocklf(lfp); 2309 } 2310 if (ret == 0) 2311 NFSUNLOCKSTATE(); 2312 goto out; 2313 } 2314 } 2315 } 2316 2317 /* 2318 * We only get here if there was no lock that conflicted. 2319 */ 2320 if (new_stp->ls_flags & (NFSLCK_TEST | NFSLCK_CHECK)) { 2321 NFSUNLOCKSTATE(); 2322 goto out; 2323 } 2324 2325 /* 2326 * We only get here when we are creating or modifying a lock. 2327 * There are two variants: 2328 * - exist_lock_owner where lock_owner exists 2329 * - open_to_lock_owner with new lock_owner 2330 */ 2331 first = new_lop->lo_first; 2332 end = new_lop->lo_end; 2333 lock_flags = new_lop->lo_flags; 2334 if (!(new_stp->ls_flags & NFSLCK_OPENTOLOCK)) { 2335 nfsrv_updatelock(lckstp, new_lopp, &other_lop, lfp); 2336 stateidp->seqid = ++(lckstp->ls_stateid.seqid); 2337 if ((nd->nd_flag & ND_NFSV41) != 0 && stateidp->seqid == 0) 2338 stateidp->seqid = lckstp->ls_stateid.seqid = 1; 2339 stateidp->other[0] = lckstp->ls_stateid.other[0]; 2340 stateidp->other[1] = lckstp->ls_stateid.other[1]; 2341 stateidp->other[2] = lckstp->ls_stateid.other[2]; 2342 } else { 2343 /* 2344 * The new open_to_lock_owner case. 2345 * Link the new nfsstate into the lists. 2346 */ 2347 new_stp->ls_seq = new_stp->ls_opentolockseq; 2348 nfsrvd_refcache(new_stp->ls_op); 2349 stateidp->seqid = new_stp->ls_stateid.seqid = 1; 2350 stateidp->other[0] = new_stp->ls_stateid.other[0] = 2351 clp->lc_clientid.lval[0]; 2352 stateidp->other[1] = new_stp->ls_stateid.other[1] = 2353 clp->lc_clientid.lval[1]; 2354 stateidp->other[2] = new_stp->ls_stateid.other[2] = 2355 nfsrv_nextstateindex(clp); 2356 new_stp->ls_clp = clp; 2357 LIST_INIT(&new_stp->ls_lock); 2358 new_stp->ls_openstp = stp; 2359 new_stp->ls_lfp = lfp; 2360 nfsrv_insertlock(new_lop, (struct nfslock *)new_stp, new_stp, 2361 lfp); 2362 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_stp->ls_stateid), 2363 new_stp, ls_hash); 2364 LIST_INSERT_HEAD(&stp->ls_open, new_stp, ls_list); 2365 *new_lopp = NULL; 2366 *new_stpp = NULL; 2367 nfsstatsv1.srvlockowners++; 2368 nfsrv_openpluslock++; 2369 } 2370 if (filestruct_locked != 0) { 2371 NFSUNLOCKSTATE(); 2372 nfsrv_locallock_commit(lfp, lock_flags, first, end); 2373 NFSLOCKSTATE(); 2374 nfsrv_unlocklf(lfp); 2375 } 2376 NFSUNLOCKSTATE(); 2377 2378 out: 2379 if (haslock) { 2380 NFSLOCKV4ROOTMUTEX(); 2381 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2382 NFSUNLOCKV4ROOTMUTEX(); 2383 } 2384 if (vnode_unlocked != 0) { 2385 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 2386 if (error == 0 && VN_IS_DOOMED(vp)) 2387 error = NFSERR_SERVERFAULT; 2388 } 2389 if (other_lop) 2390 free(other_lop, M_NFSDLOCK); 2391 NFSEXITCODE2(error, nd); 2392 return (error); 2393 } 2394 2395 /* 2396 * Check for state errors for Open. 2397 * repstat is passed back out as an error if more critical errors 2398 * are not detected. 2399 */ 2400 int 2401 nfsrv_opencheck(nfsquad_t clientid, nfsv4stateid_t *stateidp, 2402 struct nfsstate *new_stp, vnode_t vp, struct nfsrv_descript *nd, 2403 NFSPROC_T *p, int repstat) 2404 { 2405 struct nfsstate *stp, *nstp; 2406 struct nfsclient *clp; 2407 struct nfsstate *ownerstp; 2408 struct nfslockfile *lfp, *new_lfp; 2409 int error = 0, haslock = 0, ret, readonly = 0, getfhret = 0; 2410 2411 if ((new_stp->ls_flags & NFSLCK_SHAREBITS) == NFSLCK_READACCESS) 2412 readonly = 1; 2413 /* 2414 * Check for restart conditions (client and server). 2415 */ 2416 error = nfsrv_checkrestart(clientid, new_stp->ls_flags, 2417 &new_stp->ls_stateid, 0); 2418 if (error) 2419 goto out; 2420 2421 /* 2422 * Check for state resource limit exceeded. 2423 * Technically this should be SMP protected, but the worst 2424 * case error is "out by one or two" on the count when it 2425 * returns NFSERR_RESOURCE and the limit is just a rather 2426 * arbitrary high water mark, so no harm is done. 2427 */ 2428 if (nfsrv_openpluslock > nfsrv_v4statelimit) { 2429 error = NFSERR_RESOURCE; 2430 goto out; 2431 } 2432 2433 tryagain: 2434 new_lfp = malloc(sizeof (struct nfslockfile), 2435 M_NFSDLOCKFILE, M_WAITOK); 2436 if (vp) 2437 getfhret = nfsrv_getlockfh(vp, new_stp->ls_flags, new_lfp, 2438 NULL, p); 2439 NFSLOCKSTATE(); 2440 /* 2441 * Get the nfsclient structure. 2442 */ 2443 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 2444 (nfsquad_t)((u_quad_t)0), 0, nd, p); 2445 2446 /* 2447 * Look up the open owner. See if it needs confirmation and 2448 * check the seq#, as required. 2449 */ 2450 if (!error) 2451 nfsrv_getowner(&clp->lc_open, new_stp, &ownerstp); 2452 2453 if (!error && ownerstp) { 2454 error = nfsrv_checkseqid(nd, new_stp->ls_seq, ownerstp, 2455 new_stp->ls_op); 2456 /* 2457 * If the OpenOwner hasn't been confirmed, assume the 2458 * old one was a replay and this one is ok. 2459 * See: RFC3530 Sec. 14.2.18. 2460 */ 2461 if (error == NFSERR_BADSEQID && 2462 (ownerstp->ls_flags & NFSLCK_NEEDSCONFIRM)) 2463 error = 0; 2464 } 2465 2466 /* 2467 * Check for grace. 2468 */ 2469 if (!error) 2470 error = nfsrv_checkgrace(nd, clp, new_stp->ls_flags); 2471 if ((new_stp->ls_flags & NFSLCK_RECLAIM) && !error && 2472 nfsrv_checkstable(clp)) 2473 error = NFSERR_NOGRACE; 2474 2475 /* 2476 * If none of the above errors occurred, let repstat be 2477 * returned. 2478 */ 2479 if (repstat && !error) 2480 error = repstat; 2481 if (error) { 2482 NFSUNLOCKSTATE(); 2483 if (haslock) { 2484 NFSLOCKV4ROOTMUTEX(); 2485 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2486 NFSUNLOCKV4ROOTMUTEX(); 2487 } 2488 free(new_lfp, M_NFSDLOCKFILE); 2489 goto out; 2490 } 2491 2492 /* 2493 * If vp == NULL, the file doesn't exist yet, so return ok. 2494 * (This always happens on the first pass, so haslock must be 0.) 2495 */ 2496 if (vp == NULL) { 2497 NFSUNLOCKSTATE(); 2498 free(new_lfp, M_NFSDLOCKFILE); 2499 goto out; 2500 } 2501 2502 /* 2503 * Get the structure for the underlying file. 2504 */ 2505 if (getfhret) 2506 error = getfhret; 2507 else 2508 error = nfsrv_getlockfile(new_stp->ls_flags, &new_lfp, &lfp, 2509 NULL, 0); 2510 if (new_lfp) 2511 free(new_lfp, M_NFSDLOCKFILE); 2512 if (error) { 2513 NFSUNLOCKSTATE(); 2514 if (haslock) { 2515 NFSLOCKV4ROOTMUTEX(); 2516 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2517 NFSUNLOCKV4ROOTMUTEX(); 2518 } 2519 goto out; 2520 } 2521 2522 /* 2523 * Search for a conflicting open/share. 2524 */ 2525 if (new_stp->ls_flags & NFSLCK_DELEGCUR) { 2526 /* 2527 * For Delegate_Cur, search for the matching Delegation, 2528 * which indicates no conflict. 2529 * An old delegation should have been recovered by the 2530 * client doing a Claim_DELEGATE_Prev, so I won't let 2531 * it match and return NFSERR_EXPIRED. Should I let it 2532 * match? 2533 */ 2534 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) { 2535 if (!(stp->ls_flags & NFSLCK_OLDDELEG) && 2536 (((nd->nd_flag & ND_NFSV41) != 0 && 2537 stateidp->seqid == 0) || 2538 stateidp->seqid == stp->ls_stateid.seqid) && 2539 !NFSBCMP(stateidp->other, stp->ls_stateid.other, 2540 NFSX_STATEIDOTHER)) 2541 break; 2542 } 2543 if (stp == LIST_END(&lfp->lf_deleg) || 2544 ((new_stp->ls_flags & NFSLCK_WRITEACCESS) && 2545 (stp->ls_flags & NFSLCK_DELEGREAD))) { 2546 NFSUNLOCKSTATE(); 2547 if (haslock) { 2548 NFSLOCKV4ROOTMUTEX(); 2549 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2550 NFSUNLOCKV4ROOTMUTEX(); 2551 } 2552 error = NFSERR_EXPIRED; 2553 goto out; 2554 } 2555 } 2556 2557 /* 2558 * Check for access/deny bit conflicts. I check for the same 2559 * owner as well, in case the client didn't bother. 2560 */ 2561 LIST_FOREACH(stp, &lfp->lf_open, ls_file) { 2562 if (!(new_stp->ls_flags & NFSLCK_DELEGCUR) && 2563 (((new_stp->ls_flags & NFSLCK_ACCESSBITS) & 2564 ((stp->ls_flags>>NFSLCK_SHIFT) & NFSLCK_ACCESSBITS))|| 2565 ((stp->ls_flags & NFSLCK_ACCESSBITS) & 2566 ((new_stp->ls_flags>>NFSLCK_SHIFT)&NFSLCK_ACCESSBITS)))){ 2567 ret = nfsrv_clientconflict(stp->ls_clp,&haslock,vp,p); 2568 if (ret == 1) { 2569 /* 2570 * nfsrv_clientconflict() unlocks 2571 * state when it returns non-zero. 2572 */ 2573 goto tryagain; 2574 } 2575 if (ret == 2) 2576 error = NFSERR_PERM; 2577 else if (new_stp->ls_flags & NFSLCK_RECLAIM) 2578 error = NFSERR_RECLAIMCONFLICT; 2579 else 2580 error = NFSERR_SHAREDENIED; 2581 if (ret == 0) 2582 NFSUNLOCKSTATE(); 2583 if (haslock) { 2584 NFSLOCKV4ROOTMUTEX(); 2585 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2586 NFSUNLOCKV4ROOTMUTEX(); 2587 } 2588 goto out; 2589 } 2590 } 2591 2592 /* 2593 * Check for a conflicting delegation. If one is found, call 2594 * nfsrv_delegconflict() to handle it. If the v4root lock hasn't 2595 * been set yet, it will get the lock. Otherwise, it will recall 2596 * the delegation. Then, we try try again... 2597 * (If NFSLCK_DELEGCUR is set, it has a delegation, so there 2598 * isn't a conflict.) 2599 * I currently believe the conflict algorithm to be: 2600 * For Open with Read Access and Deny None 2601 * - there is a conflict iff a different client has a write delegation 2602 * For Open with other Write Access or any Deny except None 2603 * - there is a conflict if a different client has any delegation 2604 * - there is a conflict if the same client has a read delegation 2605 * (The current consensus is that this last case should be 2606 * considered a conflict since the client with a read delegation 2607 * could have done an Open with ReadAccess and WriteDeny 2608 * locally and then not have checked for the WriteDeny.) 2609 * Don't check for a Reclaim, since that will be dealt with 2610 * by nfsrv_openctrl(). 2611 */ 2612 if (!(new_stp->ls_flags & 2613 (NFSLCK_DELEGPREV | NFSLCK_DELEGCUR | NFSLCK_RECLAIM))) { 2614 stp = LIST_FIRST(&lfp->lf_deleg); 2615 while (stp != LIST_END(&lfp->lf_deleg)) { 2616 nstp = LIST_NEXT(stp, ls_file); 2617 if ((readonly && stp->ls_clp != clp && 2618 (stp->ls_flags & NFSLCK_DELEGWRITE)) || 2619 (!readonly && (stp->ls_clp != clp || 2620 (stp->ls_flags & NFSLCK_DELEGREAD)))) { 2621 ret = nfsrv_delegconflict(stp, &haslock, p, vp); 2622 if (ret) { 2623 /* 2624 * nfsrv_delegconflict() unlocks state 2625 * when it returns non-zero. 2626 */ 2627 if (ret == -1) 2628 goto tryagain; 2629 error = ret; 2630 goto out; 2631 } 2632 } 2633 stp = nstp; 2634 } 2635 } 2636 NFSUNLOCKSTATE(); 2637 if (haslock) { 2638 NFSLOCKV4ROOTMUTEX(); 2639 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2640 NFSUNLOCKV4ROOTMUTEX(); 2641 } 2642 2643 out: 2644 NFSEXITCODE2(error, nd); 2645 return (error); 2646 } 2647 2648 /* 2649 * Open control function to create/update open state for an open. 2650 */ 2651 int 2652 nfsrv_openctrl(struct nfsrv_descript *nd, vnode_t vp, 2653 struct nfsstate **new_stpp, nfsquad_t clientid, nfsv4stateid_t *stateidp, 2654 nfsv4stateid_t *delegstateidp, u_int32_t *rflagsp, struct nfsexstuff *exp, 2655 NFSPROC_T *p, u_quad_t filerev) 2656 { 2657 struct nfsstate *new_stp = *new_stpp; 2658 struct nfsstate *stp, *nstp; 2659 struct nfsstate *openstp = NULL, *new_open, *ownerstp, *new_deleg; 2660 struct nfslockfile *lfp, *new_lfp; 2661 struct nfsclient *clp; 2662 int error = 0, haslock = 0, ret, delegate = 1, writedeleg = 1; 2663 int readonly = 0, cbret = 1, getfhret = 0; 2664 int gotstate = 0, len = 0; 2665 u_char *clidp = NULL; 2666 2667 if ((new_stp->ls_flags & NFSLCK_SHAREBITS) == NFSLCK_READACCESS) 2668 readonly = 1; 2669 /* 2670 * Check for restart conditions (client and server). 2671 * (Paranoia, should have been detected by nfsrv_opencheck().) 2672 * If an error does show up, return NFSERR_EXPIRED, since the 2673 * the seqid# has already been incremented. 2674 */ 2675 error = nfsrv_checkrestart(clientid, new_stp->ls_flags, 2676 &new_stp->ls_stateid, 0); 2677 if (error) { 2678 printf("Nfsd: openctrl unexpected restart err=%d\n", 2679 error); 2680 error = NFSERR_EXPIRED; 2681 goto out; 2682 } 2683 2684 clidp = malloc(NFSV4_OPAQUELIMIT, M_TEMP, M_WAITOK); 2685 tryagain: 2686 new_lfp = malloc(sizeof (struct nfslockfile), 2687 M_NFSDLOCKFILE, M_WAITOK); 2688 new_open = malloc(sizeof (struct nfsstate), 2689 M_NFSDSTATE, M_WAITOK); 2690 new_deleg = malloc(sizeof (struct nfsstate), 2691 M_NFSDSTATE, M_WAITOK); 2692 getfhret = nfsrv_getlockfh(vp, new_stp->ls_flags, new_lfp, 2693 NULL, p); 2694 NFSLOCKSTATE(); 2695 /* 2696 * Get the client structure. Since the linked lists could be changed 2697 * by other nfsd processes if this process does a tsleep(), one of 2698 * two things must be done. 2699 * 1 - don't tsleep() 2700 * or 2701 * 2 - get the nfsv4_lock() { indicated by haslock == 1 } 2702 * before using the lists, since this lock stops the other 2703 * nfsd. This should only be used for rare cases, since it 2704 * essentially single threads the nfsd. 2705 * At this time, it is only done for cases where the stable 2706 * storage file must be written prior to completion of state 2707 * expiration. 2708 */ 2709 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 2710 (nfsquad_t)((u_quad_t)0), 0, nd, p); 2711 if (!error && (clp->lc_flags & LCL_NEEDSCBNULL) && 2712 clp->lc_program) { 2713 /* 2714 * This happens on the first open for a client 2715 * that supports callbacks. 2716 */ 2717 NFSUNLOCKSTATE(); 2718 /* 2719 * Although nfsrv_docallback() will sleep, clp won't 2720 * go away, since they are only removed when the 2721 * nfsv4_lock() has blocked the nfsd threads. The 2722 * fields in clp can change, but having multiple 2723 * threads do this Null callback RPC should be 2724 * harmless. 2725 */ 2726 cbret = nfsrv_docallback(clp, NFSV4PROC_CBNULL, 2727 NULL, 0, NULL, NULL, NULL, 0, p); 2728 NFSLOCKSTATE(); 2729 clp->lc_flags &= ~LCL_NEEDSCBNULL; 2730 if (!cbret) 2731 clp->lc_flags |= LCL_CALLBACKSON; 2732 } 2733 2734 /* 2735 * Look up the open owner. See if it needs confirmation and 2736 * check the seq#, as required. 2737 */ 2738 if (!error) 2739 nfsrv_getowner(&clp->lc_open, new_stp, &ownerstp); 2740 2741 if (error) { 2742 NFSUNLOCKSTATE(); 2743 printf("Nfsd: openctrl unexpected state err=%d\n", 2744 error); 2745 free(new_lfp, M_NFSDLOCKFILE); 2746 free(new_open, M_NFSDSTATE); 2747 free(new_deleg, M_NFSDSTATE); 2748 if (haslock) { 2749 NFSLOCKV4ROOTMUTEX(); 2750 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2751 NFSUNLOCKV4ROOTMUTEX(); 2752 } 2753 error = NFSERR_EXPIRED; 2754 goto out; 2755 } 2756 2757 if (new_stp->ls_flags & NFSLCK_RECLAIM) 2758 nfsrv_markstable(clp); 2759 2760 /* 2761 * Get the structure for the underlying file. 2762 */ 2763 if (getfhret) 2764 error = getfhret; 2765 else 2766 error = nfsrv_getlockfile(new_stp->ls_flags, &new_lfp, &lfp, 2767 NULL, 0); 2768 if (new_lfp) 2769 free(new_lfp, M_NFSDLOCKFILE); 2770 if (error) { 2771 NFSUNLOCKSTATE(); 2772 printf("Nfsd openctrl unexpected getlockfile err=%d\n", 2773 error); 2774 free(new_open, M_NFSDSTATE); 2775 free(new_deleg, M_NFSDSTATE); 2776 if (haslock) { 2777 NFSLOCKV4ROOTMUTEX(); 2778 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2779 NFSUNLOCKV4ROOTMUTEX(); 2780 } 2781 goto out; 2782 } 2783 2784 /* 2785 * Search for a conflicting open/share. 2786 */ 2787 if (new_stp->ls_flags & NFSLCK_DELEGCUR) { 2788 /* 2789 * For Delegate_Cur, search for the matching Delegation, 2790 * which indicates no conflict. 2791 * An old delegation should have been recovered by the 2792 * client doing a Claim_DELEGATE_Prev, so I won't let 2793 * it match and return NFSERR_EXPIRED. Should I let it 2794 * match? 2795 */ 2796 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) { 2797 if (!(stp->ls_flags & NFSLCK_OLDDELEG) && 2798 (((nd->nd_flag & ND_NFSV41) != 0 && 2799 stateidp->seqid == 0) || 2800 stateidp->seqid == stp->ls_stateid.seqid) && 2801 !NFSBCMP(stateidp->other, stp->ls_stateid.other, 2802 NFSX_STATEIDOTHER)) 2803 break; 2804 } 2805 if (stp == LIST_END(&lfp->lf_deleg) || 2806 ((new_stp->ls_flags & NFSLCK_WRITEACCESS) && 2807 (stp->ls_flags & NFSLCK_DELEGREAD))) { 2808 NFSUNLOCKSTATE(); 2809 printf("Nfsd openctrl unexpected expiry\n"); 2810 free(new_open, M_NFSDSTATE); 2811 free(new_deleg, M_NFSDSTATE); 2812 if (haslock) { 2813 NFSLOCKV4ROOTMUTEX(); 2814 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2815 NFSUNLOCKV4ROOTMUTEX(); 2816 } 2817 error = NFSERR_EXPIRED; 2818 goto out; 2819 } 2820 2821 /* 2822 * Don't issue a Delegation, since one already exists and 2823 * delay delegation timeout, as required. 2824 */ 2825 delegate = 0; 2826 nfsrv_delaydelegtimeout(stp); 2827 } 2828 2829 /* 2830 * Check for access/deny bit conflicts. I also check for the 2831 * same owner, since the client might not have bothered to check. 2832 * Also, note an open for the same file and owner, if found, 2833 * which is all we do here for Delegate_Cur, since conflict 2834 * checking is already done. 2835 */ 2836 LIST_FOREACH(stp, &lfp->lf_open, ls_file) { 2837 if (ownerstp && stp->ls_openowner == ownerstp) 2838 openstp = stp; 2839 if (!(new_stp->ls_flags & NFSLCK_DELEGCUR)) { 2840 /* 2841 * If another client has the file open, the only 2842 * delegation that can be issued is a Read delegation 2843 * and only if it is a Read open with Deny none. 2844 */ 2845 if (clp != stp->ls_clp) { 2846 if ((stp->ls_flags & NFSLCK_SHAREBITS) == 2847 NFSLCK_READACCESS) 2848 writedeleg = 0; 2849 else 2850 delegate = 0; 2851 } 2852 if(((new_stp->ls_flags & NFSLCK_ACCESSBITS) & 2853 ((stp->ls_flags>>NFSLCK_SHIFT) & NFSLCK_ACCESSBITS))|| 2854 ((stp->ls_flags & NFSLCK_ACCESSBITS) & 2855 ((new_stp->ls_flags>>NFSLCK_SHIFT)&NFSLCK_ACCESSBITS))){ 2856 ret = nfsrv_clientconflict(stp->ls_clp,&haslock,vp,p); 2857 if (ret == 1) { 2858 /* 2859 * nfsrv_clientconflict() unlocks state 2860 * when it returns non-zero. 2861 */ 2862 free(new_open, M_NFSDSTATE); 2863 free(new_deleg, M_NFSDSTATE); 2864 openstp = NULL; 2865 goto tryagain; 2866 } 2867 if (ret == 2) 2868 error = NFSERR_PERM; 2869 else if (new_stp->ls_flags & NFSLCK_RECLAIM) 2870 error = NFSERR_RECLAIMCONFLICT; 2871 else 2872 error = NFSERR_SHAREDENIED; 2873 if (ret == 0) 2874 NFSUNLOCKSTATE(); 2875 if (haslock) { 2876 NFSLOCKV4ROOTMUTEX(); 2877 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2878 NFSUNLOCKV4ROOTMUTEX(); 2879 } 2880 free(new_open, M_NFSDSTATE); 2881 free(new_deleg, M_NFSDSTATE); 2882 printf("nfsd openctrl unexpected client cnfl\n"); 2883 goto out; 2884 } 2885 } 2886 } 2887 2888 /* 2889 * Check for a conflicting delegation. If one is found, call 2890 * nfsrv_delegconflict() to handle it. If the v4root lock hasn't 2891 * been set yet, it will get the lock. Otherwise, it will recall 2892 * the delegation. Then, we try try again... 2893 * (If NFSLCK_DELEGCUR is set, it has a delegation, so there 2894 * isn't a conflict.) 2895 * I currently believe the conflict algorithm to be: 2896 * For Open with Read Access and Deny None 2897 * - there is a conflict iff a different client has a write delegation 2898 * For Open with other Write Access or any Deny except None 2899 * - there is a conflict if a different client has any delegation 2900 * - there is a conflict if the same client has a read delegation 2901 * (The current consensus is that this last case should be 2902 * considered a conflict since the client with a read delegation 2903 * could have done an Open with ReadAccess and WriteDeny 2904 * locally and then not have checked for the WriteDeny.) 2905 */ 2906 if (!(new_stp->ls_flags & (NFSLCK_DELEGPREV | NFSLCK_DELEGCUR))) { 2907 stp = LIST_FIRST(&lfp->lf_deleg); 2908 while (stp != LIST_END(&lfp->lf_deleg)) { 2909 nstp = LIST_NEXT(stp, ls_file); 2910 if (stp->ls_clp != clp && (stp->ls_flags & NFSLCK_DELEGREAD)) 2911 writedeleg = 0; 2912 else 2913 delegate = 0; 2914 if ((readonly && stp->ls_clp != clp && 2915 (stp->ls_flags & NFSLCK_DELEGWRITE)) || 2916 (!readonly && (stp->ls_clp != clp || 2917 (stp->ls_flags & NFSLCK_DELEGREAD)))) { 2918 if (new_stp->ls_flags & NFSLCK_RECLAIM) { 2919 delegate = 2; 2920 } else { 2921 ret = nfsrv_delegconflict(stp, &haslock, p, vp); 2922 if (ret) { 2923 /* 2924 * nfsrv_delegconflict() unlocks state 2925 * when it returns non-zero. 2926 */ 2927 printf("Nfsd openctrl unexpected deleg cnfl\n"); 2928 free(new_open, M_NFSDSTATE); 2929 free(new_deleg, M_NFSDSTATE); 2930 if (ret == -1) { 2931 openstp = NULL; 2932 goto tryagain; 2933 } 2934 error = ret; 2935 goto out; 2936 } 2937 } 2938 } 2939 stp = nstp; 2940 } 2941 } 2942 2943 /* 2944 * We only get here if there was no open that conflicted. 2945 * If an open for the owner exists, or in the access/deny bits. 2946 * Otherwise it is a new open. If the open_owner hasn't been 2947 * confirmed, replace the open with the new one needing confirmation, 2948 * otherwise add the open. 2949 */ 2950 if (new_stp->ls_flags & NFSLCK_DELEGPREV) { 2951 /* 2952 * Handle NFSLCK_DELEGPREV by searching the old delegations for 2953 * a match. If found, just move the old delegation to the current 2954 * delegation list and issue open. If not found, return 2955 * NFSERR_EXPIRED. 2956 */ 2957 LIST_FOREACH(stp, &clp->lc_olddeleg, ls_list) { 2958 if (stp->ls_lfp == lfp) { 2959 /* Found it */ 2960 if (stp->ls_clp != clp) 2961 panic("olddeleg clp"); 2962 LIST_REMOVE(stp, ls_list); 2963 LIST_REMOVE(stp, ls_hash); 2964 stp->ls_flags &= ~NFSLCK_OLDDELEG; 2965 stp->ls_stateid.seqid = delegstateidp->seqid = 1; 2966 stp->ls_stateid.other[0] = delegstateidp->other[0] = 2967 clp->lc_clientid.lval[0]; 2968 stp->ls_stateid.other[1] = delegstateidp->other[1] = 2969 clp->lc_clientid.lval[1]; 2970 stp->ls_stateid.other[2] = delegstateidp->other[2] = 2971 nfsrv_nextstateindex(clp); 2972 stp->ls_compref = nd->nd_compref; 2973 LIST_INSERT_HEAD(&clp->lc_deleg, stp, ls_list); 2974 LIST_INSERT_HEAD(NFSSTATEHASH(clp, 2975 stp->ls_stateid), stp, ls_hash); 2976 if (stp->ls_flags & NFSLCK_DELEGWRITE) 2977 *rflagsp |= NFSV4OPEN_WRITEDELEGATE; 2978 else 2979 *rflagsp |= NFSV4OPEN_READDELEGATE; 2980 clp->lc_delegtime = NFSD_MONOSEC + 2981 nfsrv_lease + NFSRV_LEASEDELTA; 2982 2983 /* 2984 * Now, do the associated open. 2985 */ 2986 new_open->ls_stateid.seqid = 1; 2987 new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0]; 2988 new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1]; 2989 new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp); 2990 new_open->ls_flags = (new_stp->ls_flags&NFSLCK_DENYBITS)| 2991 NFSLCK_OPEN; 2992 if (stp->ls_flags & NFSLCK_DELEGWRITE) 2993 new_open->ls_flags |= (NFSLCK_READACCESS | 2994 NFSLCK_WRITEACCESS); 2995 else 2996 new_open->ls_flags |= NFSLCK_READACCESS; 2997 new_open->ls_uid = new_stp->ls_uid; 2998 new_open->ls_lfp = lfp; 2999 new_open->ls_clp = clp; 3000 LIST_INIT(&new_open->ls_open); 3001 LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file); 3002 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid), 3003 new_open, ls_hash); 3004 /* 3005 * and handle the open owner 3006 */ 3007 if (ownerstp) { 3008 new_open->ls_openowner = ownerstp; 3009 LIST_INSERT_HEAD(&ownerstp->ls_open,new_open,ls_list); 3010 } else { 3011 new_open->ls_openowner = new_stp; 3012 new_stp->ls_flags = 0; 3013 nfsrvd_refcache(new_stp->ls_op); 3014 new_stp->ls_noopens = 0; 3015 LIST_INIT(&new_stp->ls_open); 3016 LIST_INSERT_HEAD(&new_stp->ls_open, new_open, ls_list); 3017 LIST_INSERT_HEAD(&clp->lc_open, new_stp, ls_list); 3018 *new_stpp = NULL; 3019 nfsstatsv1.srvopenowners++; 3020 nfsrv_openpluslock++; 3021 } 3022 openstp = new_open; 3023 new_open = NULL; 3024 nfsstatsv1.srvopens++; 3025 nfsrv_openpluslock++; 3026 break; 3027 } 3028 } 3029 if (stp == LIST_END(&clp->lc_olddeleg)) 3030 error = NFSERR_EXPIRED; 3031 } else if (new_stp->ls_flags & (NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) { 3032 /* 3033 * Scan to see that no delegation for this client and file 3034 * doesn't already exist. 3035 * There also shouldn't yet be an Open for this file and 3036 * openowner. 3037 */ 3038 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) { 3039 if (stp->ls_clp == clp) 3040 break; 3041 } 3042 if (stp == LIST_END(&lfp->lf_deleg) && openstp == NULL) { 3043 /* 3044 * This is the Claim_Previous case with a delegation 3045 * type != Delegate_None. 3046 */ 3047 /* 3048 * First, add the delegation. (Although we must issue the 3049 * delegation, we can also ask for an immediate return.) 3050 */ 3051 new_deleg->ls_stateid.seqid = delegstateidp->seqid = 1; 3052 new_deleg->ls_stateid.other[0] = delegstateidp->other[0] = 3053 clp->lc_clientid.lval[0]; 3054 new_deleg->ls_stateid.other[1] = delegstateidp->other[1] = 3055 clp->lc_clientid.lval[1]; 3056 new_deleg->ls_stateid.other[2] = delegstateidp->other[2] = 3057 nfsrv_nextstateindex(clp); 3058 if (new_stp->ls_flags & NFSLCK_DELEGWRITE) { 3059 new_deleg->ls_flags = (NFSLCK_DELEGWRITE | 3060 NFSLCK_READACCESS | NFSLCK_WRITEACCESS); 3061 *rflagsp |= NFSV4OPEN_WRITEDELEGATE; 3062 nfsrv_writedelegcnt++; 3063 } else { 3064 new_deleg->ls_flags = (NFSLCK_DELEGREAD | 3065 NFSLCK_READACCESS); 3066 *rflagsp |= NFSV4OPEN_READDELEGATE; 3067 } 3068 new_deleg->ls_uid = new_stp->ls_uid; 3069 new_deleg->ls_lfp = lfp; 3070 new_deleg->ls_clp = clp; 3071 new_deleg->ls_filerev = filerev; 3072 new_deleg->ls_compref = nd->nd_compref; 3073 LIST_INSERT_HEAD(&lfp->lf_deleg, new_deleg, ls_file); 3074 LIST_INSERT_HEAD(NFSSTATEHASH(clp, 3075 new_deleg->ls_stateid), new_deleg, ls_hash); 3076 LIST_INSERT_HEAD(&clp->lc_deleg, new_deleg, ls_list); 3077 new_deleg = NULL; 3078 if (delegate == 2 || nfsrv_issuedelegs == 0 || 3079 (clp->lc_flags & (LCL_CALLBACKSON | LCL_CBDOWN)) != 3080 LCL_CALLBACKSON || 3081 NFSRV_V4DELEGLIMIT(nfsrv_delegatecnt) || 3082 !NFSVNO_DELEGOK(vp)) 3083 *rflagsp |= NFSV4OPEN_RECALL; 3084 nfsstatsv1.srvdelegates++; 3085 nfsrv_openpluslock++; 3086 nfsrv_delegatecnt++; 3087 3088 /* 3089 * Now, do the associated open. 3090 */ 3091 new_open->ls_stateid.seqid = 1; 3092 new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0]; 3093 new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1]; 3094 new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp); 3095 new_open->ls_flags = (new_stp->ls_flags & NFSLCK_DENYBITS) | 3096 NFSLCK_OPEN; 3097 if (new_stp->ls_flags & NFSLCK_DELEGWRITE) 3098 new_open->ls_flags |= (NFSLCK_READACCESS | 3099 NFSLCK_WRITEACCESS); 3100 else 3101 new_open->ls_flags |= NFSLCK_READACCESS; 3102 new_open->ls_uid = new_stp->ls_uid; 3103 new_open->ls_lfp = lfp; 3104 new_open->ls_clp = clp; 3105 LIST_INIT(&new_open->ls_open); 3106 LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file); 3107 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid), 3108 new_open, ls_hash); 3109 /* 3110 * and handle the open owner 3111 */ 3112 if (ownerstp) { 3113 new_open->ls_openowner = ownerstp; 3114 LIST_INSERT_HEAD(&ownerstp->ls_open, new_open, ls_list); 3115 } else { 3116 new_open->ls_openowner = new_stp; 3117 new_stp->ls_flags = 0; 3118 nfsrvd_refcache(new_stp->ls_op); 3119 new_stp->ls_noopens = 0; 3120 LIST_INIT(&new_stp->ls_open); 3121 LIST_INSERT_HEAD(&new_stp->ls_open, new_open, ls_list); 3122 LIST_INSERT_HEAD(&clp->lc_open, new_stp, ls_list); 3123 *new_stpp = NULL; 3124 nfsstatsv1.srvopenowners++; 3125 nfsrv_openpluslock++; 3126 } 3127 openstp = new_open; 3128 new_open = NULL; 3129 nfsstatsv1.srvopens++; 3130 nfsrv_openpluslock++; 3131 } else { 3132 error = NFSERR_RECLAIMCONFLICT; 3133 } 3134 } else if (ownerstp) { 3135 if (ownerstp->ls_flags & NFSLCK_NEEDSCONFIRM) { 3136 /* Replace the open */ 3137 if (ownerstp->ls_op) 3138 nfsrvd_derefcache(ownerstp->ls_op); 3139 ownerstp->ls_op = new_stp->ls_op; 3140 nfsrvd_refcache(ownerstp->ls_op); 3141 ownerstp->ls_seq = new_stp->ls_seq; 3142 *rflagsp |= NFSV4OPEN_RESULTCONFIRM; 3143 stp = LIST_FIRST(&ownerstp->ls_open); 3144 stp->ls_flags = (new_stp->ls_flags & NFSLCK_SHAREBITS) | 3145 NFSLCK_OPEN; 3146 stp->ls_stateid.seqid = 1; 3147 stp->ls_uid = new_stp->ls_uid; 3148 if (lfp != stp->ls_lfp) { 3149 LIST_REMOVE(stp, ls_file); 3150 LIST_INSERT_HEAD(&lfp->lf_open, stp, ls_file); 3151 stp->ls_lfp = lfp; 3152 } 3153 openstp = stp; 3154 } else if (openstp) { 3155 openstp->ls_flags |= (new_stp->ls_flags & NFSLCK_SHAREBITS); 3156 openstp->ls_stateid.seqid++; 3157 if ((nd->nd_flag & ND_NFSV41) != 0 && 3158 openstp->ls_stateid.seqid == 0) 3159 openstp->ls_stateid.seqid = 1; 3160 3161 /* 3162 * This is where we can choose to issue a delegation. 3163 */ 3164 if ((new_stp->ls_flags & NFSLCK_WANTNODELEG) != 0) 3165 *rflagsp |= NFSV4OPEN_WDNOTWANTED; 3166 else if (nfsrv_issuedelegs == 0) 3167 *rflagsp |= NFSV4OPEN_WDSUPPFTYPE; 3168 else if (NFSRV_V4DELEGLIMIT(nfsrv_delegatecnt)) 3169 *rflagsp |= NFSV4OPEN_WDRESOURCE; 3170 else if (delegate == 0 || writedeleg == 0 || 3171 NFSVNO_EXRDONLY(exp) || (readonly != 0 && 3172 nfsrv_writedelegifpos == 0) || 3173 !NFSVNO_DELEGOK(vp) || 3174 (new_stp->ls_flags & NFSLCK_WANTRDELEG) != 0 || 3175 (clp->lc_flags & (LCL_CALLBACKSON | LCL_CBDOWN)) != 3176 LCL_CALLBACKSON) 3177 *rflagsp |= NFSV4OPEN_WDCONTENTION; 3178 else { 3179 new_deleg->ls_stateid.seqid = delegstateidp->seqid = 1; 3180 new_deleg->ls_stateid.other[0] = delegstateidp->other[0] 3181 = clp->lc_clientid.lval[0]; 3182 new_deleg->ls_stateid.other[1] = delegstateidp->other[1] 3183 = clp->lc_clientid.lval[1]; 3184 new_deleg->ls_stateid.other[2] = delegstateidp->other[2] 3185 = nfsrv_nextstateindex(clp); 3186 new_deleg->ls_flags = (NFSLCK_DELEGWRITE | 3187 NFSLCK_READACCESS | NFSLCK_WRITEACCESS); 3188 *rflagsp |= NFSV4OPEN_WRITEDELEGATE; 3189 new_deleg->ls_uid = new_stp->ls_uid; 3190 new_deleg->ls_lfp = lfp; 3191 new_deleg->ls_clp = clp; 3192 new_deleg->ls_filerev = filerev; 3193 new_deleg->ls_compref = nd->nd_compref; 3194 nfsrv_writedelegcnt++; 3195 LIST_INSERT_HEAD(&lfp->lf_deleg, new_deleg, ls_file); 3196 LIST_INSERT_HEAD(NFSSTATEHASH(clp, 3197 new_deleg->ls_stateid), new_deleg, ls_hash); 3198 LIST_INSERT_HEAD(&clp->lc_deleg, new_deleg, ls_list); 3199 new_deleg = NULL; 3200 nfsstatsv1.srvdelegates++; 3201 nfsrv_openpluslock++; 3202 nfsrv_delegatecnt++; 3203 } 3204 } else { 3205 new_open->ls_stateid.seqid = 1; 3206 new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0]; 3207 new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1]; 3208 new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp); 3209 new_open->ls_flags = (new_stp->ls_flags & NFSLCK_SHAREBITS)| 3210 NFSLCK_OPEN; 3211 new_open->ls_uid = new_stp->ls_uid; 3212 new_open->ls_openowner = ownerstp; 3213 new_open->ls_lfp = lfp; 3214 new_open->ls_clp = clp; 3215 LIST_INIT(&new_open->ls_open); 3216 LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file); 3217 LIST_INSERT_HEAD(&ownerstp->ls_open, new_open, ls_list); 3218 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid), 3219 new_open, ls_hash); 3220 openstp = new_open; 3221 new_open = NULL; 3222 nfsstatsv1.srvopens++; 3223 nfsrv_openpluslock++; 3224 3225 /* 3226 * This is where we can choose to issue a delegation. 3227 */ 3228 if ((new_stp->ls_flags & NFSLCK_WANTNODELEG) != 0) 3229 *rflagsp |= NFSV4OPEN_WDNOTWANTED; 3230 else if (nfsrv_issuedelegs == 0) 3231 *rflagsp |= NFSV4OPEN_WDSUPPFTYPE; 3232 else if (NFSRV_V4DELEGLIMIT(nfsrv_delegatecnt)) 3233 *rflagsp |= NFSV4OPEN_WDRESOURCE; 3234 else if (delegate == 0 || (writedeleg == 0 && 3235 readonly == 0) || !NFSVNO_DELEGOK(vp) || 3236 (clp->lc_flags & (LCL_CALLBACKSON | LCL_CBDOWN)) != 3237 LCL_CALLBACKSON) 3238 *rflagsp |= NFSV4OPEN_WDCONTENTION; 3239 else { 3240 new_deleg->ls_stateid.seqid = delegstateidp->seqid = 1; 3241 new_deleg->ls_stateid.other[0] = delegstateidp->other[0] 3242 = clp->lc_clientid.lval[0]; 3243 new_deleg->ls_stateid.other[1] = delegstateidp->other[1] 3244 = clp->lc_clientid.lval[1]; 3245 new_deleg->ls_stateid.other[2] = delegstateidp->other[2] 3246 = nfsrv_nextstateindex(clp); 3247 if (writedeleg && !NFSVNO_EXRDONLY(exp) && 3248 (nfsrv_writedelegifpos || !readonly) && 3249 (new_stp->ls_flags & NFSLCK_WANTRDELEG) == 0) { 3250 new_deleg->ls_flags = (NFSLCK_DELEGWRITE | 3251 NFSLCK_READACCESS | NFSLCK_WRITEACCESS); 3252 *rflagsp |= NFSV4OPEN_WRITEDELEGATE; 3253 nfsrv_writedelegcnt++; 3254 } else { 3255 new_deleg->ls_flags = (NFSLCK_DELEGREAD | 3256 NFSLCK_READACCESS); 3257 *rflagsp |= NFSV4OPEN_READDELEGATE; 3258 } 3259 new_deleg->ls_uid = new_stp->ls_uid; 3260 new_deleg->ls_lfp = lfp; 3261 new_deleg->ls_clp = clp; 3262 new_deleg->ls_filerev = filerev; 3263 new_deleg->ls_compref = nd->nd_compref; 3264 LIST_INSERT_HEAD(&lfp->lf_deleg, new_deleg, ls_file); 3265 LIST_INSERT_HEAD(NFSSTATEHASH(clp, 3266 new_deleg->ls_stateid), new_deleg, ls_hash); 3267 LIST_INSERT_HEAD(&clp->lc_deleg, new_deleg, ls_list); 3268 new_deleg = NULL; 3269 nfsstatsv1.srvdelegates++; 3270 nfsrv_openpluslock++; 3271 nfsrv_delegatecnt++; 3272 } 3273 } 3274 } else { 3275 /* 3276 * New owner case. Start the open_owner sequence with a 3277 * Needs confirmation (unless a reclaim) and hang the 3278 * new open off it. 3279 */ 3280 new_open->ls_stateid.seqid = 1; 3281 new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0]; 3282 new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1]; 3283 new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp); 3284 new_open->ls_flags = (new_stp->ls_flags & NFSLCK_SHAREBITS) | 3285 NFSLCK_OPEN; 3286 new_open->ls_uid = new_stp->ls_uid; 3287 LIST_INIT(&new_open->ls_open); 3288 new_open->ls_openowner = new_stp; 3289 new_open->ls_lfp = lfp; 3290 new_open->ls_clp = clp; 3291 LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file); 3292 if (new_stp->ls_flags & NFSLCK_RECLAIM) { 3293 new_stp->ls_flags = 0; 3294 } else if ((nd->nd_flag & ND_NFSV41) != 0) { 3295 /* NFSv4.1 never needs confirmation. */ 3296 new_stp->ls_flags = 0; 3297 3298 /* 3299 * This is where we can choose to issue a delegation. 3300 */ 3301 if (delegate && nfsrv_issuedelegs && 3302 (writedeleg || readonly) && 3303 (clp->lc_flags & (LCL_CALLBACKSON | LCL_CBDOWN)) == 3304 LCL_CALLBACKSON && 3305 !NFSRV_V4DELEGLIMIT(nfsrv_delegatecnt) && 3306 NFSVNO_DELEGOK(vp) && 3307 ((nd->nd_flag & ND_NFSV41) == 0 || 3308 (new_stp->ls_flags & NFSLCK_WANTNODELEG) == 0)) { 3309 new_deleg->ls_stateid.seqid = 3310 delegstateidp->seqid = 1; 3311 new_deleg->ls_stateid.other[0] = 3312 delegstateidp->other[0] 3313 = clp->lc_clientid.lval[0]; 3314 new_deleg->ls_stateid.other[1] = 3315 delegstateidp->other[1] 3316 = clp->lc_clientid.lval[1]; 3317 new_deleg->ls_stateid.other[2] = 3318 delegstateidp->other[2] 3319 = nfsrv_nextstateindex(clp); 3320 if (writedeleg && !NFSVNO_EXRDONLY(exp) && 3321 (nfsrv_writedelegifpos || !readonly) && 3322 ((nd->nd_flag & ND_NFSV41) == 0 || 3323 (new_stp->ls_flags & NFSLCK_WANTRDELEG) == 3324 0)) { 3325 new_deleg->ls_flags = 3326 (NFSLCK_DELEGWRITE | 3327 NFSLCK_READACCESS | 3328 NFSLCK_WRITEACCESS); 3329 *rflagsp |= NFSV4OPEN_WRITEDELEGATE; 3330 nfsrv_writedelegcnt++; 3331 } else { 3332 new_deleg->ls_flags = 3333 (NFSLCK_DELEGREAD | 3334 NFSLCK_READACCESS); 3335 *rflagsp |= NFSV4OPEN_READDELEGATE; 3336 } 3337 new_deleg->ls_uid = new_stp->ls_uid; 3338 new_deleg->ls_lfp = lfp; 3339 new_deleg->ls_clp = clp; 3340 new_deleg->ls_filerev = filerev; 3341 new_deleg->ls_compref = nd->nd_compref; 3342 LIST_INSERT_HEAD(&lfp->lf_deleg, new_deleg, 3343 ls_file); 3344 LIST_INSERT_HEAD(NFSSTATEHASH(clp, 3345 new_deleg->ls_stateid), new_deleg, ls_hash); 3346 LIST_INSERT_HEAD(&clp->lc_deleg, new_deleg, 3347 ls_list); 3348 new_deleg = NULL; 3349 nfsstatsv1.srvdelegates++; 3350 nfsrv_openpluslock++; 3351 nfsrv_delegatecnt++; 3352 } 3353 /* 3354 * Since NFSv4.1 never does an OpenConfirm, the first 3355 * open state will be acquired here. 3356 */ 3357 if (!(clp->lc_flags & LCL_STAMPEDSTABLE)) { 3358 clp->lc_flags |= LCL_STAMPEDSTABLE; 3359 len = clp->lc_idlen; 3360 NFSBCOPY(clp->lc_id, clidp, len); 3361 gotstate = 1; 3362 } 3363 } else { 3364 *rflagsp |= NFSV4OPEN_RESULTCONFIRM; 3365 new_stp->ls_flags = NFSLCK_NEEDSCONFIRM; 3366 } 3367 nfsrvd_refcache(new_stp->ls_op); 3368 new_stp->ls_noopens = 0; 3369 LIST_INIT(&new_stp->ls_open); 3370 LIST_INSERT_HEAD(&new_stp->ls_open, new_open, ls_list); 3371 LIST_INSERT_HEAD(&clp->lc_open, new_stp, ls_list); 3372 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid), 3373 new_open, ls_hash); 3374 openstp = new_open; 3375 new_open = NULL; 3376 *new_stpp = NULL; 3377 nfsstatsv1.srvopens++; 3378 nfsrv_openpluslock++; 3379 nfsstatsv1.srvopenowners++; 3380 nfsrv_openpluslock++; 3381 } 3382 if (!error) { 3383 stateidp->seqid = openstp->ls_stateid.seqid; 3384 stateidp->other[0] = openstp->ls_stateid.other[0]; 3385 stateidp->other[1] = openstp->ls_stateid.other[1]; 3386 stateidp->other[2] = openstp->ls_stateid.other[2]; 3387 } 3388 NFSUNLOCKSTATE(); 3389 if (haslock) { 3390 NFSLOCKV4ROOTMUTEX(); 3391 nfsv4_unlock(&nfsv4rootfs_lock, 1); 3392 NFSUNLOCKV4ROOTMUTEX(); 3393 } 3394 if (new_open) 3395 free(new_open, M_NFSDSTATE); 3396 if (new_deleg) 3397 free(new_deleg, M_NFSDSTATE); 3398 3399 /* 3400 * If the NFSv4.1 client just acquired its first open, write a timestamp 3401 * to the stable storage file. 3402 */ 3403 if (gotstate != 0) { 3404 nfsrv_writestable(clidp, len, NFSNST_NEWSTATE, p); 3405 nfsrv_backupstable(); 3406 } 3407 3408 out: 3409 free(clidp, M_TEMP); 3410 NFSEXITCODE2(error, nd); 3411 return (error); 3412 } 3413 3414 /* 3415 * Open update. Does the confirm, downgrade and close. 3416 */ 3417 int 3418 nfsrv_openupdate(vnode_t vp, struct nfsstate *new_stp, nfsquad_t clientid, 3419 nfsv4stateid_t *stateidp, struct nfsrv_descript *nd, NFSPROC_T *p, 3420 int *retwriteaccessp) 3421 { 3422 struct nfsstate *stp; 3423 struct nfsclient *clp; 3424 struct nfslockfile *lfp; 3425 u_int32_t bits; 3426 int error = 0, gotstate = 0, len = 0; 3427 u_char *clidp = NULL; 3428 3429 /* 3430 * Check for restart conditions (client and server). 3431 */ 3432 error = nfsrv_checkrestart(clientid, new_stp->ls_flags, 3433 &new_stp->ls_stateid, 0); 3434 if (error) 3435 goto out; 3436 3437 clidp = malloc(NFSV4_OPAQUELIMIT, M_TEMP, M_WAITOK); 3438 NFSLOCKSTATE(); 3439 /* 3440 * Get the open structure via clientid and stateid. 3441 */ 3442 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 3443 (nfsquad_t)((u_quad_t)0), 0, nd, p); 3444 if (!error) 3445 error = nfsrv_getstate(clp, &new_stp->ls_stateid, 3446 new_stp->ls_flags, &stp); 3447 3448 /* 3449 * Sanity check the open. 3450 */ 3451 if (!error && (!(stp->ls_flags & NFSLCK_OPEN) || 3452 (!(new_stp->ls_flags & NFSLCK_CONFIRM) && 3453 (stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM)) || 3454 ((new_stp->ls_flags & NFSLCK_CONFIRM) && 3455 (!(stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM))))) 3456 error = NFSERR_BADSTATEID; 3457 3458 if (!error) 3459 error = nfsrv_checkseqid(nd, new_stp->ls_seq, 3460 stp->ls_openowner, new_stp->ls_op); 3461 if (!error && stp->ls_stateid.seqid != new_stp->ls_stateid.seqid && 3462 (((nd->nd_flag & ND_NFSV41) == 0 && 3463 !(new_stp->ls_flags & NFSLCK_CONFIRM)) || 3464 ((nd->nd_flag & ND_NFSV41) != 0 && 3465 new_stp->ls_stateid.seqid != 0))) 3466 error = NFSERR_OLDSTATEID; 3467 if (!error && vnode_vtype(vp) != VREG) { 3468 if (vnode_vtype(vp) == VDIR) 3469 error = NFSERR_ISDIR; 3470 else 3471 error = NFSERR_INVAL; 3472 } 3473 3474 if (error) { 3475 /* 3476 * If a client tries to confirm an Open with a bad 3477 * seqid# and there are no byte range locks or other Opens 3478 * on the openowner, just throw it away, so the next use of the 3479 * openowner will start a fresh seq#. 3480 */ 3481 if (error == NFSERR_BADSEQID && 3482 (new_stp->ls_flags & NFSLCK_CONFIRM) && 3483 nfsrv_nootherstate(stp)) 3484 nfsrv_freeopenowner(stp->ls_openowner, 0, p); 3485 NFSUNLOCKSTATE(); 3486 goto out; 3487 } 3488 3489 /* 3490 * Set the return stateid. 3491 */ 3492 stateidp->seqid = stp->ls_stateid.seqid + 1; 3493 if ((nd->nd_flag & ND_NFSV41) != 0 && stateidp->seqid == 0) 3494 stateidp->seqid = 1; 3495 stateidp->other[0] = stp->ls_stateid.other[0]; 3496 stateidp->other[1] = stp->ls_stateid.other[1]; 3497 stateidp->other[2] = stp->ls_stateid.other[2]; 3498 /* 3499 * Now, handle the three cases. 3500 */ 3501 if (new_stp->ls_flags & NFSLCK_CONFIRM) { 3502 /* 3503 * If the open doesn't need confirmation, it seems to me that 3504 * there is a client error, but I'll just log it and keep going? 3505 */ 3506 if (!(stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM)) 3507 printf("Nfsv4d: stray open confirm\n"); 3508 stp->ls_openowner->ls_flags = 0; 3509 stp->ls_stateid.seqid++; 3510 if ((nd->nd_flag & ND_NFSV41) != 0 && 3511 stp->ls_stateid.seqid == 0) 3512 stp->ls_stateid.seqid = 1; 3513 if (!(clp->lc_flags & LCL_STAMPEDSTABLE)) { 3514 clp->lc_flags |= LCL_STAMPEDSTABLE; 3515 len = clp->lc_idlen; 3516 NFSBCOPY(clp->lc_id, clidp, len); 3517 gotstate = 1; 3518 } 3519 NFSUNLOCKSTATE(); 3520 } else if (new_stp->ls_flags & NFSLCK_CLOSE) { 3521 lfp = stp->ls_lfp; 3522 if (retwriteaccessp != NULL) { 3523 if ((stp->ls_flags & NFSLCK_WRITEACCESS) != 0) 3524 *retwriteaccessp = 1; 3525 else 3526 *retwriteaccessp = 0; 3527 } 3528 if (nfsrv_dolocallocks != 0 && !LIST_EMPTY(&stp->ls_open)) { 3529 /* Get the lf lock */ 3530 nfsrv_locklf(lfp); 3531 NFSUNLOCKSTATE(); 3532 ASSERT_VOP_ELOCKED(vp, "nfsrv_openupdate"); 3533 NFSVOPUNLOCK(vp); 3534 if (nfsrv_freeopen(stp, vp, 1, p) == 0) { 3535 NFSLOCKSTATE(); 3536 nfsrv_unlocklf(lfp); 3537 NFSUNLOCKSTATE(); 3538 } 3539 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 3540 } else { 3541 (void) nfsrv_freeopen(stp, NULL, 0, p); 3542 NFSUNLOCKSTATE(); 3543 } 3544 } else { 3545 /* 3546 * Update the share bits, making sure that the new set are a 3547 * subset of the old ones. 3548 */ 3549 bits = (new_stp->ls_flags & NFSLCK_SHAREBITS); 3550 if (~(stp->ls_flags) & bits) { 3551 NFSUNLOCKSTATE(); 3552 error = NFSERR_INVAL; 3553 goto out; 3554 } 3555 stp->ls_flags = (bits | NFSLCK_OPEN); 3556 stp->ls_stateid.seqid++; 3557 if ((nd->nd_flag & ND_NFSV41) != 0 && 3558 stp->ls_stateid.seqid == 0) 3559 stp->ls_stateid.seqid = 1; 3560 NFSUNLOCKSTATE(); 3561 } 3562 3563 /* 3564 * If the client just confirmed its first open, write a timestamp 3565 * to the stable storage file. 3566 */ 3567 if (gotstate != 0) { 3568 nfsrv_writestable(clidp, len, NFSNST_NEWSTATE, p); 3569 nfsrv_backupstable(); 3570 } 3571 3572 out: 3573 free(clidp, M_TEMP); 3574 NFSEXITCODE2(error, nd); 3575 return (error); 3576 } 3577 3578 /* 3579 * Delegation update. Does the purge and return. 3580 */ 3581 int 3582 nfsrv_delegupdate(struct nfsrv_descript *nd, nfsquad_t clientid, 3583 nfsv4stateid_t *stateidp, vnode_t vp, int op, struct ucred *cred, 3584 NFSPROC_T *p, int *retwriteaccessp) 3585 { 3586 struct nfsstate *stp; 3587 struct nfsclient *clp; 3588 int error = 0; 3589 fhandle_t fh; 3590 3591 /* 3592 * Do a sanity check against the file handle for DelegReturn. 3593 */ 3594 if (vp) { 3595 error = nfsvno_getfh(vp, &fh, p); 3596 if (error) 3597 goto out; 3598 } 3599 /* 3600 * Check for restart conditions (client and server). 3601 */ 3602 if (op == NFSV4OP_DELEGRETURN) 3603 error = nfsrv_checkrestart(clientid, NFSLCK_DELEGRETURN, 3604 stateidp, 0); 3605 else 3606 error = nfsrv_checkrestart(clientid, NFSLCK_DELEGPURGE, 3607 stateidp, 0); 3608 3609 NFSLOCKSTATE(); 3610 /* 3611 * Get the open structure via clientid and stateid. 3612 */ 3613 if (!error) 3614 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 3615 (nfsquad_t)((u_quad_t)0), 0, nd, p); 3616 if (error) { 3617 if (error == NFSERR_CBPATHDOWN) 3618 error = 0; 3619 if (error == NFSERR_STALECLIENTID && op == NFSV4OP_DELEGRETURN) 3620 error = NFSERR_STALESTATEID; 3621 } 3622 if (!error && op == NFSV4OP_DELEGRETURN) { 3623 error = nfsrv_getstate(clp, stateidp, NFSLCK_DELEGRETURN, &stp); 3624 if (!error && stp->ls_stateid.seqid != stateidp->seqid && 3625 ((nd->nd_flag & ND_NFSV41) == 0 || stateidp->seqid != 0)) 3626 error = NFSERR_OLDSTATEID; 3627 } 3628 /* 3629 * NFSERR_EXPIRED means that the state has gone away, 3630 * so Delegations have been purged. Just return ok. 3631 */ 3632 if (error == NFSERR_EXPIRED && op == NFSV4OP_DELEGPURGE) { 3633 NFSUNLOCKSTATE(); 3634 error = 0; 3635 goto out; 3636 } 3637 if (error) { 3638 NFSUNLOCKSTATE(); 3639 goto out; 3640 } 3641 3642 if (op == NFSV4OP_DELEGRETURN) { 3643 if (NFSBCMP((caddr_t)&fh, (caddr_t)&stp->ls_lfp->lf_fh, 3644 sizeof (fhandle_t))) { 3645 NFSUNLOCKSTATE(); 3646 error = NFSERR_BADSTATEID; 3647 goto out; 3648 } 3649 if (retwriteaccessp != NULL) { 3650 if ((stp->ls_flags & NFSLCK_DELEGWRITE) != 0) 3651 *retwriteaccessp = 1; 3652 else 3653 *retwriteaccessp = 0; 3654 } 3655 nfsrv_freedeleg(stp); 3656 } else { 3657 nfsrv_freedeleglist(&clp->lc_olddeleg); 3658 } 3659 NFSUNLOCKSTATE(); 3660 error = 0; 3661 3662 out: 3663 NFSEXITCODE(error); 3664 return (error); 3665 } 3666 3667 /* 3668 * Release lock owner. 3669 */ 3670 int 3671 nfsrv_releaselckown(struct nfsstate *new_stp, nfsquad_t clientid, 3672 NFSPROC_T *p) 3673 { 3674 struct nfsstate *stp, *nstp, *openstp, *ownstp; 3675 struct nfsclient *clp; 3676 int error = 0; 3677 3678 /* 3679 * Check for restart conditions (client and server). 3680 */ 3681 error = nfsrv_checkrestart(clientid, new_stp->ls_flags, 3682 &new_stp->ls_stateid, 0); 3683 if (error) 3684 goto out; 3685 3686 NFSLOCKSTATE(); 3687 /* 3688 * Get the lock owner by name. 3689 */ 3690 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 3691 (nfsquad_t)((u_quad_t)0), 0, NULL, p); 3692 if (error) { 3693 NFSUNLOCKSTATE(); 3694 goto out; 3695 } 3696 LIST_FOREACH(ownstp, &clp->lc_open, ls_list) { 3697 LIST_FOREACH(openstp, &ownstp->ls_open, ls_list) { 3698 stp = LIST_FIRST(&openstp->ls_open); 3699 while (stp != LIST_END(&openstp->ls_open)) { 3700 nstp = LIST_NEXT(stp, ls_list); 3701 /* 3702 * If the owner matches, check for locks and 3703 * then free or return an error. 3704 */ 3705 if (stp->ls_ownerlen == new_stp->ls_ownerlen && 3706 !NFSBCMP(stp->ls_owner, new_stp->ls_owner, 3707 stp->ls_ownerlen)){ 3708 if (LIST_EMPTY(&stp->ls_lock)) { 3709 nfsrv_freelockowner(stp, NULL, 0, p); 3710 } else { 3711 NFSUNLOCKSTATE(); 3712 error = NFSERR_LOCKSHELD; 3713 goto out; 3714 } 3715 } 3716 stp = nstp; 3717 } 3718 } 3719 } 3720 NFSUNLOCKSTATE(); 3721 3722 out: 3723 NFSEXITCODE(error); 3724 return (error); 3725 } 3726 3727 /* 3728 * Get the file handle for a lock structure. 3729 */ 3730 static int 3731 nfsrv_getlockfh(vnode_t vp, u_short flags, struct nfslockfile *new_lfp, 3732 fhandle_t *nfhp, NFSPROC_T *p) 3733 { 3734 fhandle_t *fhp = NULL; 3735 int error; 3736 3737 /* 3738 * For lock, use the new nfslock structure, otherwise just 3739 * a fhandle_t on the stack. 3740 */ 3741 if (flags & NFSLCK_OPEN) { 3742 KASSERT(new_lfp != NULL, ("nfsrv_getlockfh: new_lfp NULL")); 3743 fhp = &new_lfp->lf_fh; 3744 } else if (nfhp) { 3745 fhp = nfhp; 3746 } else { 3747 panic("nfsrv_getlockfh"); 3748 } 3749 error = nfsvno_getfh(vp, fhp, p); 3750 NFSEXITCODE(error); 3751 return (error); 3752 } 3753 3754 /* 3755 * Get an nfs lock structure. Allocate one, as required, and return a 3756 * pointer to it. 3757 * Returns an NFSERR_xxx upon failure or -1 to indicate no current lock. 3758 */ 3759 static int 3760 nfsrv_getlockfile(u_short flags, struct nfslockfile **new_lfpp, 3761 struct nfslockfile **lfpp, fhandle_t *nfhp, int lockit) 3762 { 3763 struct nfslockfile *lfp; 3764 fhandle_t *fhp = NULL, *tfhp; 3765 struct nfslockhashhead *hp; 3766 struct nfslockfile *new_lfp = NULL; 3767 3768 /* 3769 * For lock, use the new nfslock structure, otherwise just 3770 * a fhandle_t on the stack. 3771 */ 3772 if (flags & NFSLCK_OPEN) { 3773 new_lfp = *new_lfpp; 3774 fhp = &new_lfp->lf_fh; 3775 } else if (nfhp) { 3776 fhp = nfhp; 3777 } else { 3778 panic("nfsrv_getlockfile"); 3779 } 3780 3781 hp = NFSLOCKHASH(fhp); 3782 LIST_FOREACH(lfp, hp, lf_hash) { 3783 tfhp = &lfp->lf_fh; 3784 if (NFSVNO_CMPFH(fhp, tfhp)) { 3785 if (lockit) 3786 nfsrv_locklf(lfp); 3787 *lfpp = lfp; 3788 return (0); 3789 } 3790 } 3791 if (!(flags & NFSLCK_OPEN)) 3792 return (-1); 3793 3794 /* 3795 * No match, so chain the new one into the list. 3796 */ 3797 LIST_INIT(&new_lfp->lf_open); 3798 LIST_INIT(&new_lfp->lf_lock); 3799 LIST_INIT(&new_lfp->lf_deleg); 3800 LIST_INIT(&new_lfp->lf_locallock); 3801 LIST_INIT(&new_lfp->lf_rollback); 3802 new_lfp->lf_locallock_lck.nfslock_usecnt = 0; 3803 new_lfp->lf_locallock_lck.nfslock_lock = 0; 3804 new_lfp->lf_usecount = 0; 3805 LIST_INSERT_HEAD(hp, new_lfp, lf_hash); 3806 *lfpp = new_lfp; 3807 *new_lfpp = NULL; 3808 return (0); 3809 } 3810 3811 /* 3812 * This function adds a nfslock lock structure to the list for the associated 3813 * nfsstate and nfslockfile structures. It will be inserted after the 3814 * entry pointed at by insert_lop. 3815 */ 3816 static void 3817 nfsrv_insertlock(struct nfslock *new_lop, struct nfslock *insert_lop, 3818 struct nfsstate *stp, struct nfslockfile *lfp) 3819 { 3820 struct nfslock *lop, *nlop; 3821 3822 new_lop->lo_stp = stp; 3823 new_lop->lo_lfp = lfp; 3824 3825 if (stp != NULL) { 3826 /* Insert in increasing lo_first order */ 3827 lop = LIST_FIRST(&lfp->lf_lock); 3828 if (lop == LIST_END(&lfp->lf_lock) || 3829 new_lop->lo_first <= lop->lo_first) { 3830 LIST_INSERT_HEAD(&lfp->lf_lock, new_lop, lo_lckfile); 3831 } else { 3832 nlop = LIST_NEXT(lop, lo_lckfile); 3833 while (nlop != LIST_END(&lfp->lf_lock) && 3834 nlop->lo_first < new_lop->lo_first) { 3835 lop = nlop; 3836 nlop = LIST_NEXT(lop, lo_lckfile); 3837 } 3838 LIST_INSERT_AFTER(lop, new_lop, lo_lckfile); 3839 } 3840 } else { 3841 new_lop->lo_lckfile.le_prev = NULL; /* list not used */ 3842 } 3843 3844 /* 3845 * Insert after insert_lop, which is overloaded as stp or lfp for 3846 * an empty list. 3847 */ 3848 if (stp == NULL && (struct nfslockfile *)insert_lop == lfp) 3849 LIST_INSERT_HEAD(&lfp->lf_locallock, new_lop, lo_lckowner); 3850 else if ((struct nfsstate *)insert_lop == stp) 3851 LIST_INSERT_HEAD(&stp->ls_lock, new_lop, lo_lckowner); 3852 else 3853 LIST_INSERT_AFTER(insert_lop, new_lop, lo_lckowner); 3854 if (stp != NULL) { 3855 nfsstatsv1.srvlocks++; 3856 nfsrv_openpluslock++; 3857 } 3858 } 3859 3860 /* 3861 * This function updates the locking for a lock owner and given file. It 3862 * maintains a list of lock ranges ordered on increasing file offset that 3863 * are NFSLCK_READ or NFSLCK_WRITE and non-overlapping (aka POSIX style). 3864 * It always adds new_lop to the list and sometimes uses the one pointed 3865 * at by other_lopp. 3866 */ 3867 static void 3868 nfsrv_updatelock(struct nfsstate *stp, struct nfslock **new_lopp, 3869 struct nfslock **other_lopp, struct nfslockfile *lfp) 3870 { 3871 struct nfslock *new_lop = *new_lopp; 3872 struct nfslock *lop, *tlop, *ilop; 3873 struct nfslock *other_lop = *other_lopp; 3874 int unlock = 0, myfile = 0; 3875 u_int64_t tmp; 3876 3877 /* 3878 * Work down the list until the lock is merged. 3879 */ 3880 if (new_lop->lo_flags & NFSLCK_UNLOCK) 3881 unlock = 1; 3882 if (stp != NULL) { 3883 ilop = (struct nfslock *)stp; 3884 lop = LIST_FIRST(&stp->ls_lock); 3885 } else { 3886 ilop = (struct nfslock *)lfp; 3887 lop = LIST_FIRST(&lfp->lf_locallock); 3888 } 3889 while (lop != NULL) { 3890 /* 3891 * Only check locks for this file that aren't before the start of 3892 * new lock's range. 3893 */ 3894 if (lop->lo_lfp == lfp) { 3895 myfile = 1; 3896 if (lop->lo_end >= new_lop->lo_first) { 3897 if (new_lop->lo_end < lop->lo_first) { 3898 /* 3899 * If the new lock ends before the start of the 3900 * current lock's range, no merge, just insert 3901 * the new lock. 3902 */ 3903 break; 3904 } 3905 if (new_lop->lo_flags == lop->lo_flags || 3906 (new_lop->lo_first <= lop->lo_first && 3907 new_lop->lo_end >= lop->lo_end)) { 3908 /* 3909 * This lock can be absorbed by the new lock/unlock. 3910 * This happens when it covers the entire range 3911 * of the old lock or is contiguous 3912 * with the old lock and is of the same type or an 3913 * unlock. 3914 */ 3915 if (lop->lo_first < new_lop->lo_first) 3916 new_lop->lo_first = lop->lo_first; 3917 if (lop->lo_end > new_lop->lo_end) 3918 new_lop->lo_end = lop->lo_end; 3919 tlop = lop; 3920 lop = LIST_NEXT(lop, lo_lckowner); 3921 nfsrv_freenfslock(tlop); 3922 continue; 3923 } 3924 3925 /* 3926 * All these cases are for contiguous locks that are not the 3927 * same type, so they can't be merged. 3928 */ 3929 if (new_lop->lo_first <= lop->lo_first) { 3930 /* 3931 * This case is where the new lock overlaps with the 3932 * first part of the old lock. Move the start of the 3933 * old lock to just past the end of the new lock. The 3934 * new lock will be inserted in front of the old, since 3935 * ilop hasn't been updated. (We are done now.) 3936 */ 3937 lop->lo_first = new_lop->lo_end; 3938 break; 3939 } 3940 if (new_lop->lo_end >= lop->lo_end) { 3941 /* 3942 * This case is where the new lock overlaps with the 3943 * end of the old lock's range. Move the old lock's 3944 * end to just before the new lock's first and insert 3945 * the new lock after the old lock. 3946 * Might not be done yet, since the new lock could 3947 * overlap further locks with higher ranges. 3948 */ 3949 lop->lo_end = new_lop->lo_first; 3950 ilop = lop; 3951 lop = LIST_NEXT(lop, lo_lckowner); 3952 continue; 3953 } 3954 /* 3955 * The final case is where the new lock's range is in the 3956 * middle of the current lock's and splits the current lock 3957 * up. Use *other_lopp to handle the second part of the 3958 * split old lock range. (We are done now.) 3959 * For unlock, we use new_lop as other_lop and tmp, since 3960 * other_lop and new_lop are the same for this case. 3961 * We noted the unlock case above, so we don't need 3962 * new_lop->lo_flags any longer. 3963 */ 3964 tmp = new_lop->lo_first; 3965 if (other_lop == NULL) { 3966 if (!unlock) 3967 panic("nfsd srv update unlock"); 3968 other_lop = new_lop; 3969 *new_lopp = NULL; 3970 } 3971 other_lop->lo_first = new_lop->lo_end; 3972 other_lop->lo_end = lop->lo_end; 3973 other_lop->lo_flags = lop->lo_flags; 3974 other_lop->lo_stp = stp; 3975 other_lop->lo_lfp = lfp; 3976 lop->lo_end = tmp; 3977 nfsrv_insertlock(other_lop, lop, stp, lfp); 3978 *other_lopp = NULL; 3979 ilop = lop; 3980 break; 3981 } 3982 } 3983 ilop = lop; 3984 lop = LIST_NEXT(lop, lo_lckowner); 3985 if (myfile && (lop == NULL || lop->lo_lfp != lfp)) 3986 break; 3987 } 3988 3989 /* 3990 * Insert the new lock in the list at the appropriate place. 3991 */ 3992 if (!unlock) { 3993 nfsrv_insertlock(new_lop, ilop, stp, lfp); 3994 *new_lopp = NULL; 3995 } 3996 } 3997 3998 /* 3999 * This function handles sequencing of locks, etc. 4000 * It returns an error that indicates what the caller should do. 4001 */ 4002 static int 4003 nfsrv_checkseqid(struct nfsrv_descript *nd, u_int32_t seqid, 4004 struct nfsstate *stp, struct nfsrvcache *op) 4005 { 4006 int error = 0; 4007 4008 if ((nd->nd_flag & ND_NFSV41) != 0) 4009 /* NFSv4.1 ignores the open_seqid and lock_seqid. */ 4010 goto out; 4011 if (op != nd->nd_rp) 4012 panic("nfsrvstate checkseqid"); 4013 if (!(op->rc_flag & RC_INPROG)) 4014 panic("nfsrvstate not inprog"); 4015 if (stp->ls_op && stp->ls_op->rc_refcnt <= 0) { 4016 printf("refcnt=%d\n", stp->ls_op->rc_refcnt); 4017 panic("nfsrvstate op refcnt"); 4018 } 4019 if ((stp->ls_seq + 1) == seqid) { 4020 if (stp->ls_op) 4021 nfsrvd_derefcache(stp->ls_op); 4022 stp->ls_op = op; 4023 nfsrvd_refcache(op); 4024 stp->ls_seq = seqid; 4025 goto out; 4026 } else if (stp->ls_seq == seqid && stp->ls_op && 4027 op->rc_xid == stp->ls_op->rc_xid && 4028 op->rc_refcnt == 0 && 4029 op->rc_reqlen == stp->ls_op->rc_reqlen && 4030 op->rc_cksum == stp->ls_op->rc_cksum) { 4031 if (stp->ls_op->rc_flag & RC_INPROG) { 4032 error = NFSERR_DONTREPLY; 4033 goto out; 4034 } 4035 nd->nd_rp = stp->ls_op; 4036 nd->nd_rp->rc_flag |= RC_INPROG; 4037 nfsrvd_delcache(op); 4038 error = NFSERR_REPLYFROMCACHE; 4039 goto out; 4040 } 4041 error = NFSERR_BADSEQID; 4042 4043 out: 4044 NFSEXITCODE2(error, nd); 4045 return (error); 4046 } 4047 4048 /* 4049 * Get the client ip address for callbacks. If the strings can't be parsed, 4050 * just set lc_program to 0 to indicate no callbacks are possible. 4051 * (For cases where the address can't be parsed or is 0.0.0.0.0.0, set 4052 * the address to the client's transport address. This won't be used 4053 * for callbacks, but can be printed out by nfsstats for info.) 4054 * Return error if the xdr can't be parsed, 0 otherwise. 4055 */ 4056 int 4057 nfsrv_getclientipaddr(struct nfsrv_descript *nd, struct nfsclient *clp) 4058 { 4059 u_int32_t *tl; 4060 u_char *cp, *cp2; 4061 int i, j, maxalen = 0, minalen = 0; 4062 sa_family_t af; 4063 #ifdef INET 4064 struct sockaddr_in *rin = NULL, *sin; 4065 #endif 4066 #ifdef INET6 4067 struct sockaddr_in6 *rin6 = NULL, *sin6; 4068 #endif 4069 u_char *addr; 4070 int error = 0, cantparse = 0; 4071 union { 4072 in_addr_t ival; 4073 u_char cval[4]; 4074 } ip; 4075 union { 4076 in_port_t sval; 4077 u_char cval[2]; 4078 } port; 4079 4080 /* 8 is the maximum length of the port# string. */ 4081 addr = malloc(INET6_ADDRSTRLEN + 8, M_TEMP, M_WAITOK); 4082 clp->lc_req.nr_client = NULL; 4083 clp->lc_req.nr_lock = 0; 4084 af = AF_UNSPEC; 4085 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 4086 i = fxdr_unsigned(int, *tl); 4087 if (i >= 3 && i <= 4) { 4088 error = nfsrv_mtostr(nd, addr, i); 4089 if (error) 4090 goto nfsmout; 4091 #ifdef INET 4092 if (!strcmp(addr, "tcp")) { 4093 clp->lc_flags |= LCL_TCPCALLBACK; 4094 clp->lc_req.nr_sotype = SOCK_STREAM; 4095 clp->lc_req.nr_soproto = IPPROTO_TCP; 4096 af = AF_INET; 4097 } else if (!strcmp(addr, "udp")) { 4098 clp->lc_req.nr_sotype = SOCK_DGRAM; 4099 clp->lc_req.nr_soproto = IPPROTO_UDP; 4100 af = AF_INET; 4101 } 4102 #endif 4103 #ifdef INET6 4104 if (af == AF_UNSPEC) { 4105 if (!strcmp(addr, "tcp6")) { 4106 clp->lc_flags |= LCL_TCPCALLBACK; 4107 clp->lc_req.nr_sotype = SOCK_STREAM; 4108 clp->lc_req.nr_soproto = IPPROTO_TCP; 4109 af = AF_INET6; 4110 } else if (!strcmp(addr, "udp6")) { 4111 clp->lc_req.nr_sotype = SOCK_DGRAM; 4112 clp->lc_req.nr_soproto = IPPROTO_UDP; 4113 af = AF_INET6; 4114 } 4115 } 4116 #endif 4117 if (af == AF_UNSPEC) { 4118 cantparse = 1; 4119 } 4120 } else { 4121 cantparse = 1; 4122 if (i > 0) { 4123 error = nfsm_advance(nd, NFSM_RNDUP(i), -1); 4124 if (error) 4125 goto nfsmout; 4126 } 4127 } 4128 /* 4129 * The caller has allocated clp->lc_req.nr_nam to be large enough 4130 * for either AF_INET or AF_INET6 and zeroed out the contents. 4131 * maxalen is set to the maximum length of the host IP address string 4132 * plus 8 for the maximum length of the port#. 4133 * minalen is set to the minimum length of the host IP address string 4134 * plus 4 for the minimum length of the port#. 4135 * These lengths do not include NULL termination, 4136 * so INET[6]_ADDRSTRLEN - 1 is used in the calculations. 4137 */ 4138 switch (af) { 4139 #ifdef INET 4140 case AF_INET: 4141 rin = (struct sockaddr_in *)clp->lc_req.nr_nam; 4142 rin->sin_family = AF_INET; 4143 rin->sin_len = sizeof(struct sockaddr_in); 4144 maxalen = INET_ADDRSTRLEN - 1 + 8; 4145 minalen = 7 + 4; 4146 break; 4147 #endif 4148 #ifdef INET6 4149 case AF_INET6: 4150 rin6 = (struct sockaddr_in6 *)clp->lc_req.nr_nam; 4151 rin6->sin6_family = AF_INET6; 4152 rin6->sin6_len = sizeof(struct sockaddr_in6); 4153 maxalen = INET6_ADDRSTRLEN - 1 + 8; 4154 minalen = 3 + 4; 4155 break; 4156 #endif 4157 } 4158 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 4159 i = fxdr_unsigned(int, *tl); 4160 if (i < 0) { 4161 error = NFSERR_BADXDR; 4162 goto nfsmout; 4163 } else if (i == 0) { 4164 cantparse = 1; 4165 } else if (!cantparse && i <= maxalen && i >= minalen) { 4166 error = nfsrv_mtostr(nd, addr, i); 4167 if (error) 4168 goto nfsmout; 4169 4170 /* 4171 * Parse out the address fields. We expect 6 decimal numbers 4172 * separated by '.'s for AF_INET and two decimal numbers 4173 * preceeded by '.'s for AF_INET6. 4174 */ 4175 cp = NULL; 4176 switch (af) { 4177 #ifdef INET6 4178 /* 4179 * For AF_INET6, first parse the host address. 4180 */ 4181 case AF_INET6: 4182 cp = strchr(addr, '.'); 4183 if (cp != NULL) { 4184 *cp++ = '\0'; 4185 if (inet_pton(af, addr, &rin6->sin6_addr) == 1) 4186 i = 4; 4187 else { 4188 cp = NULL; 4189 cantparse = 1; 4190 } 4191 } 4192 break; 4193 #endif 4194 #ifdef INET 4195 case AF_INET: 4196 cp = addr; 4197 i = 0; 4198 break; 4199 #endif 4200 } 4201 while (cp != NULL && *cp && i < 6) { 4202 cp2 = cp; 4203 while (*cp2 && *cp2 != '.') 4204 cp2++; 4205 if (*cp2) 4206 *cp2++ = '\0'; 4207 else if (i != 5) { 4208 cantparse = 1; 4209 break; 4210 } 4211 j = nfsrv_getipnumber(cp); 4212 if (j >= 0) { 4213 if (i < 4) 4214 ip.cval[3 - i] = j; 4215 else 4216 port.cval[5 - i] = j; 4217 } else { 4218 cantparse = 1; 4219 break; 4220 } 4221 cp = cp2; 4222 i++; 4223 } 4224 if (!cantparse) { 4225 /* 4226 * The host address INADDR_ANY is (mis)used to indicate 4227 * "there is no valid callback address". 4228 */ 4229 switch (af) { 4230 #ifdef INET6 4231 case AF_INET6: 4232 if (!IN6_ARE_ADDR_EQUAL(&rin6->sin6_addr, 4233 &in6addr_any)) 4234 rin6->sin6_port = htons(port.sval); 4235 else 4236 cantparse = 1; 4237 break; 4238 #endif 4239 #ifdef INET 4240 case AF_INET: 4241 if (ip.ival != INADDR_ANY) { 4242 rin->sin_addr.s_addr = htonl(ip.ival); 4243 rin->sin_port = htons(port.sval); 4244 } else { 4245 cantparse = 1; 4246 } 4247 break; 4248 #endif 4249 } 4250 } 4251 } else { 4252 cantparse = 1; 4253 if (i > 0) { 4254 error = nfsm_advance(nd, NFSM_RNDUP(i), -1); 4255 if (error) 4256 goto nfsmout; 4257 } 4258 } 4259 if (cantparse) { 4260 switch (nd->nd_nam->sa_family) { 4261 #ifdef INET 4262 case AF_INET: 4263 sin = (struct sockaddr_in *)nd->nd_nam; 4264 rin = (struct sockaddr_in *)clp->lc_req.nr_nam; 4265 rin->sin_family = AF_INET; 4266 rin->sin_len = sizeof(struct sockaddr_in); 4267 rin->sin_addr.s_addr = sin->sin_addr.s_addr; 4268 rin->sin_port = 0x0; 4269 break; 4270 #endif 4271 #ifdef INET6 4272 case AF_INET6: 4273 sin6 = (struct sockaddr_in6 *)nd->nd_nam; 4274 rin6 = (struct sockaddr_in6 *)clp->lc_req.nr_nam; 4275 rin6->sin6_family = AF_INET6; 4276 rin6->sin6_len = sizeof(struct sockaddr_in6); 4277 rin6->sin6_addr = sin6->sin6_addr; 4278 rin6->sin6_port = 0x0; 4279 break; 4280 #endif 4281 } 4282 clp->lc_program = 0; 4283 } 4284 nfsmout: 4285 free(addr, M_TEMP); 4286 NFSEXITCODE2(error, nd); 4287 return (error); 4288 } 4289 4290 /* 4291 * Turn a string of up to three decimal digits into a number. Return -1 upon 4292 * error. 4293 */ 4294 static int 4295 nfsrv_getipnumber(u_char *cp) 4296 { 4297 int i = 0, j = 0; 4298 4299 while (*cp) { 4300 if (j > 2 || *cp < '0' || *cp > '9') 4301 return (-1); 4302 i *= 10; 4303 i += (*cp - '0'); 4304 cp++; 4305 j++; 4306 } 4307 if (i < 256) 4308 return (i); 4309 return (-1); 4310 } 4311 4312 /* 4313 * This function checks for restart conditions. 4314 */ 4315 static int 4316 nfsrv_checkrestart(nfsquad_t clientid, u_int32_t flags, 4317 nfsv4stateid_t *stateidp, int specialid) 4318 { 4319 int ret = 0; 4320 4321 /* 4322 * First check for a server restart. Open, LockT, ReleaseLockOwner 4323 * and DelegPurge have a clientid, the rest a stateid. 4324 */ 4325 if (flags & 4326 (NFSLCK_OPEN | NFSLCK_TEST | NFSLCK_RELEASE | NFSLCK_DELEGPURGE)) { 4327 if (clientid.lval[0] != nfsrvboottime) { 4328 ret = NFSERR_STALECLIENTID; 4329 goto out; 4330 } 4331 } else if (stateidp->other[0] != nfsrvboottime && 4332 specialid == 0) { 4333 ret = NFSERR_STALESTATEID; 4334 goto out; 4335 } 4336 4337 /* 4338 * Read, Write, Setattr and LockT can return NFSERR_GRACE and do 4339 * not use a lock/open owner seqid#, so the check can be done now. 4340 * (The others will be checked, as required, later.) 4341 */ 4342 if (!(flags & (NFSLCK_CHECK | NFSLCK_TEST))) 4343 goto out; 4344 4345 NFSLOCKSTATE(); 4346 ret = nfsrv_checkgrace(NULL, NULL, flags); 4347 NFSUNLOCKSTATE(); 4348 4349 out: 4350 NFSEXITCODE(ret); 4351 return (ret); 4352 } 4353 4354 /* 4355 * Check for grace. 4356 */ 4357 static int 4358 nfsrv_checkgrace(struct nfsrv_descript *nd, struct nfsclient *clp, 4359 u_int32_t flags) 4360 { 4361 int error = 0, notreclaimed; 4362 struct nfsrv_stable *sp; 4363 4364 if ((nfsrv_stablefirst.nsf_flags & (NFSNSF_UPDATEDONE | 4365 NFSNSF_GRACEOVER)) == 0) { 4366 /* 4367 * First, check to see if all of the clients have done a 4368 * ReclaimComplete. If so, grace can end now. 4369 */ 4370 notreclaimed = 0; 4371 LIST_FOREACH(sp, &nfsrv_stablefirst.nsf_head, nst_list) { 4372 if ((sp->nst_flag & NFSNST_RECLAIMED) == 0) { 4373 notreclaimed = 1; 4374 break; 4375 } 4376 } 4377 if (notreclaimed == 0) 4378 nfsrv_stablefirst.nsf_flags |= (NFSNSF_GRACEOVER | 4379 NFSNSF_NEEDLOCK); 4380 } 4381 4382 if ((nfsrv_stablefirst.nsf_flags & NFSNSF_GRACEOVER) != 0) { 4383 if (flags & NFSLCK_RECLAIM) { 4384 error = NFSERR_NOGRACE; 4385 goto out; 4386 } 4387 } else { 4388 if (!(flags & NFSLCK_RECLAIM)) { 4389 error = NFSERR_GRACE; 4390 goto out; 4391 } 4392 if (nd != NULL && clp != NULL && 4393 (nd->nd_flag & ND_NFSV41) != 0 && 4394 (clp->lc_flags & LCL_RECLAIMCOMPLETE) != 0) { 4395 error = NFSERR_NOGRACE; 4396 goto out; 4397 } 4398 4399 /* 4400 * If grace is almost over and we are still getting Reclaims, 4401 * extend grace a bit. 4402 */ 4403 if ((NFSD_MONOSEC + NFSRV_LEASEDELTA) > 4404 nfsrv_stablefirst.nsf_eograce) 4405 nfsrv_stablefirst.nsf_eograce = NFSD_MONOSEC + 4406 NFSRV_LEASEDELTA; 4407 } 4408 4409 out: 4410 NFSEXITCODE(error); 4411 return (error); 4412 } 4413 4414 /* 4415 * Do a server callback. 4416 * The "trunc" argument is slightly overloaded and refers to different 4417 * boolean arguments for CBRECALL and CBLAYOUTRECALL. 4418 */ 4419 static int 4420 nfsrv_docallback(struct nfsclient *clp, int procnum, nfsv4stateid_t *stateidp, 4421 int trunc, fhandle_t *fhp, struct nfsvattr *nap, nfsattrbit_t *attrbitp, 4422 int laytype, NFSPROC_T *p) 4423 { 4424 struct mbuf *m; 4425 u_int32_t *tl; 4426 struct nfsrv_descript *nd; 4427 struct ucred *cred; 4428 int error = 0; 4429 u_int32_t callback; 4430 struct nfsdsession *sep = NULL; 4431 uint64_t tval; 4432 bool dotls; 4433 4434 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 4435 cred = newnfs_getcred(); 4436 NFSLOCKSTATE(); /* mostly for lc_cbref++ */ 4437 if (clp->lc_flags & LCL_NEEDSCONFIRM) { 4438 NFSUNLOCKSTATE(); 4439 panic("docallb"); 4440 } 4441 clp->lc_cbref++; 4442 4443 /* 4444 * Fill the callback program# and version into the request 4445 * structure for newnfs_connect() to use. 4446 */ 4447 clp->lc_req.nr_prog = clp->lc_program; 4448 #ifdef notnow 4449 if ((clp->lc_flags & LCL_NFSV41) != 0) 4450 clp->lc_req.nr_vers = NFSV41_CBVERS; 4451 else 4452 #endif 4453 clp->lc_req.nr_vers = NFSV4_CBVERS; 4454 4455 /* 4456 * First, fill in some of the fields of nd and cr. 4457 */ 4458 nd->nd_flag = ND_NFSV4; 4459 if (clp->lc_flags & LCL_GSS) 4460 nd->nd_flag |= ND_KERBV; 4461 if ((clp->lc_flags & LCL_NFSV41) != 0) 4462 nd->nd_flag |= ND_NFSV41; 4463 if ((clp->lc_flags & LCL_NFSV42) != 0) 4464 nd->nd_flag |= ND_NFSV42; 4465 nd->nd_repstat = 0; 4466 cred->cr_uid = clp->lc_uid; 4467 cred->cr_gid = clp->lc_gid; 4468 callback = clp->lc_callback; 4469 NFSUNLOCKSTATE(); 4470 cred->cr_ngroups = 1; 4471 4472 /* 4473 * Get the first mbuf for the request. 4474 */ 4475 MGET(m, M_WAITOK, MT_DATA); 4476 m->m_len = 0; 4477 nd->nd_mreq = nd->nd_mb = m; 4478 nd->nd_bpos = mtod(m, caddr_t); 4479 4480 /* 4481 * and build the callback request. 4482 */ 4483 if (procnum == NFSV4OP_CBGETATTR) { 4484 nd->nd_procnum = NFSV4PROC_CBCOMPOUND; 4485 error = nfsrv_cbcallargs(nd, clp, callback, NFSV4OP_CBGETATTR, 4486 "CB Getattr", &sep); 4487 if (error != 0) { 4488 m_freem(nd->nd_mreq); 4489 goto errout; 4490 } 4491 (void)nfsm_fhtom(nd, (u_int8_t *)fhp, NFSX_MYFH, 0); 4492 (void)nfsrv_putattrbit(nd, attrbitp); 4493 } else if (procnum == NFSV4OP_CBRECALL) { 4494 nd->nd_procnum = NFSV4PROC_CBCOMPOUND; 4495 error = nfsrv_cbcallargs(nd, clp, callback, NFSV4OP_CBRECALL, 4496 "CB Recall", &sep); 4497 if (error != 0) { 4498 m_freem(nd->nd_mreq); 4499 goto errout; 4500 } 4501 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_STATEID); 4502 *tl++ = txdr_unsigned(stateidp->seqid); 4503 NFSBCOPY((caddr_t)stateidp->other, (caddr_t)tl, 4504 NFSX_STATEIDOTHER); 4505 tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED); 4506 if (trunc) 4507 *tl = newnfs_true; 4508 else 4509 *tl = newnfs_false; 4510 (void)nfsm_fhtom(nd, (u_int8_t *)fhp, NFSX_MYFH, 0); 4511 } else if (procnum == NFSV4OP_CBLAYOUTRECALL) { 4512 NFSD_DEBUG(4, "docallback layout recall\n"); 4513 nd->nd_procnum = NFSV4PROC_CBCOMPOUND; 4514 error = nfsrv_cbcallargs(nd, clp, callback, 4515 NFSV4OP_CBLAYOUTRECALL, "CB Reclayout", &sep); 4516 NFSD_DEBUG(4, "aft cbcallargs=%d\n", error); 4517 if (error != 0) { 4518 m_freem(nd->nd_mreq); 4519 goto errout; 4520 } 4521 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 4522 *tl++ = txdr_unsigned(laytype); 4523 *tl++ = txdr_unsigned(NFSLAYOUTIOMODE_ANY); 4524 if (trunc) 4525 *tl++ = newnfs_true; 4526 else 4527 *tl++ = newnfs_false; 4528 *tl = txdr_unsigned(NFSV4LAYOUTRET_FILE); 4529 nfsm_fhtom(nd, (uint8_t *)fhp, NFSX_MYFH, 0); 4530 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_HYPER + NFSX_STATEID); 4531 tval = 0; 4532 txdr_hyper(tval, tl); tl += 2; 4533 tval = UINT64_MAX; 4534 txdr_hyper(tval, tl); tl += 2; 4535 *tl++ = txdr_unsigned(stateidp->seqid); 4536 NFSBCOPY(stateidp->other, tl, NFSX_STATEIDOTHER); 4537 tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED); 4538 NFSD_DEBUG(4, "aft args\n"); 4539 } else if (procnum == NFSV4PROC_CBNULL) { 4540 nd->nd_procnum = NFSV4PROC_CBNULL; 4541 if ((clp->lc_flags & LCL_NFSV41) != 0) { 4542 error = nfsv4_getcbsession(clp, &sep); 4543 if (error != 0) { 4544 m_freem(nd->nd_mreq); 4545 goto errout; 4546 } 4547 } 4548 } else { 4549 error = NFSERR_SERVERFAULT; 4550 m_freem(nd->nd_mreq); 4551 goto errout; 4552 } 4553 4554 /* 4555 * Call newnfs_connect(), as required, and then newnfs_request(). 4556 */ 4557 dotls = false; 4558 if ((clp->lc_flags & LCL_TLSCB) != 0) 4559 dotls = true; 4560 (void) newnfs_sndlock(&clp->lc_req.nr_lock); 4561 if (clp->lc_req.nr_client == NULL) { 4562 if ((clp->lc_flags & LCL_NFSV41) != 0) { 4563 error = ECONNREFUSED; 4564 nfsrv_freesession(sep, NULL); 4565 } else if (nd->nd_procnum == NFSV4PROC_CBNULL) 4566 error = newnfs_connect(NULL, &clp->lc_req, cred, 4567 NULL, 1, dotls); 4568 else 4569 error = newnfs_connect(NULL, &clp->lc_req, cred, 4570 NULL, 3, dotls); 4571 } 4572 newnfs_sndunlock(&clp->lc_req.nr_lock); 4573 NFSD_DEBUG(4, "aft sndunlock=%d\n", error); 4574 if (!error) { 4575 if ((nd->nd_flag & ND_NFSV41) != 0) { 4576 KASSERT(sep != NULL, ("sep NULL")); 4577 if (sep->sess_cbsess.nfsess_xprt != NULL) 4578 error = newnfs_request(nd, NULL, clp, 4579 &clp->lc_req, NULL, NULL, cred, 4580 clp->lc_program, clp->lc_req.nr_vers, NULL, 4581 1, NULL, &sep->sess_cbsess); 4582 else { 4583 /* 4584 * This should probably never occur, but if a 4585 * client somehow does an RPC without a 4586 * SequenceID Op that causes a callback just 4587 * after the nfsd threads have been terminated 4588 * and restared we could conceivably get here 4589 * without a backchannel xprt. 4590 */ 4591 printf("nfsrv_docallback: no xprt\n"); 4592 error = ECONNREFUSED; 4593 } 4594 NFSD_DEBUG(4, "aft newnfs_request=%d\n", error); 4595 nfsrv_freesession(sep, NULL); 4596 } else 4597 error = newnfs_request(nd, NULL, clp, &clp->lc_req, 4598 NULL, NULL, cred, clp->lc_program, 4599 clp->lc_req.nr_vers, NULL, 1, NULL, NULL); 4600 } 4601 errout: 4602 NFSFREECRED(cred); 4603 4604 /* 4605 * If error is set here, the Callback path isn't working 4606 * properly, so twiddle the appropriate LCL_ flags. 4607 * (nd_repstat != 0 indicates the Callback path is working, 4608 * but the callback failed on the client.) 4609 */ 4610 if (error) { 4611 /* 4612 * Mark the callback pathway down, which disabled issuing 4613 * of delegations and gets Renew to return NFSERR_CBPATHDOWN. 4614 */ 4615 NFSLOCKSTATE(); 4616 clp->lc_flags |= LCL_CBDOWN; 4617 NFSUNLOCKSTATE(); 4618 } else { 4619 /* 4620 * Callback worked. If the callback path was down, disable 4621 * callbacks, so no more delegations will be issued. (This 4622 * is done on the assumption that the callback pathway is 4623 * flakey.) 4624 */ 4625 NFSLOCKSTATE(); 4626 if (clp->lc_flags & LCL_CBDOWN) 4627 clp->lc_flags &= ~(LCL_CBDOWN | LCL_CALLBACKSON); 4628 NFSUNLOCKSTATE(); 4629 if (nd->nd_repstat) { 4630 error = nd->nd_repstat; 4631 NFSD_DEBUG(1, "nfsrv_docallback op=%d err=%d\n", 4632 procnum, error); 4633 } else if (error == 0 && procnum == NFSV4OP_CBGETATTR) 4634 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, 4635 NULL, NULL, NULL, NULL, NULL, 0, NULL, NULL, NULL, 4636 p, NULL); 4637 m_freem(nd->nd_mrep); 4638 } 4639 NFSLOCKSTATE(); 4640 clp->lc_cbref--; 4641 if ((clp->lc_flags & LCL_WAKEUPWANTED) && clp->lc_cbref == 0) { 4642 clp->lc_flags &= ~LCL_WAKEUPWANTED; 4643 wakeup(clp); 4644 } 4645 NFSUNLOCKSTATE(); 4646 4647 free(nd, M_TEMP); 4648 NFSEXITCODE(error); 4649 return (error); 4650 } 4651 4652 /* 4653 * Set up the compound RPC for the callback. 4654 */ 4655 static int 4656 nfsrv_cbcallargs(struct nfsrv_descript *nd, struct nfsclient *clp, 4657 uint32_t callback, int op, const char *optag, struct nfsdsession **sepp) 4658 { 4659 uint32_t *tl; 4660 int error, len; 4661 4662 len = strlen(optag); 4663 (void)nfsm_strtom(nd, optag, len); 4664 NFSM_BUILD(tl, uint32_t *, 4 * NFSX_UNSIGNED); 4665 if ((nd->nd_flag & ND_NFSV41) != 0) { 4666 if ((nd->nd_flag & ND_NFSV42) != 0) 4667 *tl++ = txdr_unsigned(NFSV42_MINORVERSION); 4668 else 4669 *tl++ = txdr_unsigned(NFSV41_MINORVERSION); 4670 *tl++ = txdr_unsigned(callback); 4671 *tl++ = txdr_unsigned(2); 4672 *tl = txdr_unsigned(NFSV4OP_CBSEQUENCE); 4673 error = nfsv4_setcbsequence(nd, clp, 1, sepp); 4674 if (error != 0) 4675 return (error); 4676 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 4677 *tl = txdr_unsigned(op); 4678 } else { 4679 *tl++ = txdr_unsigned(NFSV4_MINORVERSION); 4680 *tl++ = txdr_unsigned(callback); 4681 *tl++ = txdr_unsigned(1); 4682 *tl = txdr_unsigned(op); 4683 } 4684 return (0); 4685 } 4686 4687 /* 4688 * Return the next index# for a clientid. Mostly just increment and return 4689 * the next one, but... if the 32bit unsigned does actually wrap around, 4690 * it should be rebooted. 4691 * At an average rate of one new client per second, it will wrap around in 4692 * approximately 136 years. (I think the server will have been shut 4693 * down or rebooted before then.) 4694 */ 4695 static u_int32_t 4696 nfsrv_nextclientindex(void) 4697 { 4698 static u_int32_t client_index = 0; 4699 4700 client_index++; 4701 if (client_index != 0) 4702 return (client_index); 4703 4704 printf("%s: out of clientids\n", __func__); 4705 return (client_index); 4706 } 4707 4708 /* 4709 * Return the next index# for a stateid. Mostly just increment and return 4710 * the next one, but... if the 32bit unsigned does actually wrap around 4711 * (will a BSD server stay up that long?), find 4712 * new start and end values. 4713 */ 4714 static u_int32_t 4715 nfsrv_nextstateindex(struct nfsclient *clp) 4716 { 4717 struct nfsstate *stp; 4718 int i; 4719 u_int32_t canuse, min_index, max_index; 4720 4721 if (!(clp->lc_flags & LCL_INDEXNOTOK)) { 4722 clp->lc_stateindex++; 4723 if (clp->lc_stateindex != clp->lc_statemaxindex) 4724 return (clp->lc_stateindex); 4725 } 4726 4727 /* 4728 * Yuck, we've hit the end. 4729 * Look for a new min and max. 4730 */ 4731 min_index = 0; 4732 max_index = 0xffffffff; 4733 for (i = 0; i < nfsrv_statehashsize; i++) { 4734 LIST_FOREACH(stp, &clp->lc_stateid[i], ls_hash) { 4735 if (stp->ls_stateid.other[2] > 0x80000000) { 4736 if (stp->ls_stateid.other[2] < max_index) 4737 max_index = stp->ls_stateid.other[2]; 4738 } else { 4739 if (stp->ls_stateid.other[2] > min_index) 4740 min_index = stp->ls_stateid.other[2]; 4741 } 4742 } 4743 } 4744 4745 /* 4746 * Yikes, highly unlikely, but I'll handle it anyhow. 4747 */ 4748 if (min_index == 0x80000000 && max_index == 0x80000001) { 4749 canuse = 0; 4750 /* 4751 * Loop around until we find an unused entry. Return that 4752 * and set LCL_INDEXNOTOK, so the search will continue next time. 4753 * (This is one of those rare cases where a goto is the 4754 * cleanest way to code the loop.) 4755 */ 4756 tryagain: 4757 for (i = 0; i < nfsrv_statehashsize; i++) { 4758 LIST_FOREACH(stp, &clp->lc_stateid[i], ls_hash) { 4759 if (stp->ls_stateid.other[2] == canuse) { 4760 canuse++; 4761 goto tryagain; 4762 } 4763 } 4764 } 4765 clp->lc_flags |= LCL_INDEXNOTOK; 4766 return (canuse); 4767 } 4768 4769 /* 4770 * Ok to start again from min + 1. 4771 */ 4772 clp->lc_stateindex = min_index + 1; 4773 clp->lc_statemaxindex = max_index; 4774 clp->lc_flags &= ~LCL_INDEXNOTOK; 4775 return (clp->lc_stateindex); 4776 } 4777 4778 /* 4779 * The following functions handle the stable storage file that deals with 4780 * the edge conditions described in RFC3530 Sec. 8.6.3. 4781 * The file is as follows: 4782 * - a single record at the beginning that has the lease time of the 4783 * previous server instance (before the last reboot) and the nfsrvboottime 4784 * values for the previous server boots. 4785 * These previous boot times are used to ensure that the current 4786 * nfsrvboottime does not, somehow, get set to a previous one. 4787 * (This is important so that Stale ClientIDs and StateIDs can 4788 * be recognized.) 4789 * The number of previous nfsvrboottime values precedes the list. 4790 * - followed by some number of appended records with: 4791 * - client id string 4792 * - flag that indicates it is a record revoking state via lease 4793 * expiration or similar 4794 * OR has successfully acquired state. 4795 * These structures vary in length, with the client string at the end, up 4796 * to NFSV4_OPAQUELIMIT in size. 4797 * 4798 * At the end of the grace period, the file is truncated, the first 4799 * record is rewritten with updated information and any acquired state 4800 * records for successful reclaims of state are written. 4801 * 4802 * Subsequent records are appended when the first state is issued to 4803 * a client and when state is revoked for a client. 4804 * 4805 * When reading the file in, state issued records that come later in 4806 * the file override older ones, since the append log is in cronological order. 4807 * If, for some reason, the file can't be read, the grace period is 4808 * immediately terminated and all reclaims get NFSERR_NOGRACE. 4809 */ 4810 4811 /* 4812 * Read in the stable storage file. Called by nfssvc() before the nfsd 4813 * processes start servicing requests. 4814 */ 4815 void 4816 nfsrv_setupstable(NFSPROC_T *p) 4817 { 4818 struct nfsrv_stablefirst *sf = &nfsrv_stablefirst; 4819 struct nfsrv_stable *sp, *nsp; 4820 struct nfst_rec *tsp; 4821 int error, i, tryagain; 4822 off_t off = 0; 4823 ssize_t aresid, len; 4824 4825 /* 4826 * If NFSNSF_UPDATEDONE is set, this is a restart of the nfsds without 4827 * a reboot, so state has not been lost. 4828 */ 4829 if (sf->nsf_flags & NFSNSF_UPDATEDONE) 4830 return; 4831 /* 4832 * Set Grace over just until the file reads successfully. 4833 */ 4834 nfsrvboottime = time_second; 4835 LIST_INIT(&sf->nsf_head); 4836 sf->nsf_flags = (NFSNSF_GRACEOVER | NFSNSF_NEEDLOCK); 4837 sf->nsf_eograce = NFSD_MONOSEC + NFSRV_LEASEDELTA; 4838 if (sf->nsf_fp == NULL) 4839 return; 4840 error = NFSD_RDWR(UIO_READ, NFSFPVNODE(sf->nsf_fp), 4841 (caddr_t)&sf->nsf_rec, sizeof (struct nfsf_rec), off, UIO_SYSSPACE, 4842 0, NFSFPCRED(sf->nsf_fp), &aresid, p); 4843 if (error || aresid || sf->nsf_numboots == 0 || 4844 sf->nsf_numboots > NFSNSF_MAXNUMBOOTS) 4845 return; 4846 4847 /* 4848 * Now, read in the boottimes. 4849 */ 4850 sf->nsf_bootvals = (time_t *)malloc((sf->nsf_numboots + 1) * 4851 sizeof (time_t), M_TEMP, M_WAITOK); 4852 off = sizeof (struct nfsf_rec); 4853 error = NFSD_RDWR(UIO_READ, NFSFPVNODE(sf->nsf_fp), 4854 (caddr_t)sf->nsf_bootvals, sf->nsf_numboots * sizeof (time_t), off, 4855 UIO_SYSSPACE, 0, NFSFPCRED(sf->nsf_fp), &aresid, p); 4856 if (error || aresid) { 4857 free(sf->nsf_bootvals, M_TEMP); 4858 sf->nsf_bootvals = NULL; 4859 return; 4860 } 4861 4862 /* 4863 * Make sure this nfsrvboottime is different from all recorded 4864 * previous ones. 4865 */ 4866 do { 4867 tryagain = 0; 4868 for (i = 0; i < sf->nsf_numboots; i++) { 4869 if (nfsrvboottime == sf->nsf_bootvals[i]) { 4870 nfsrvboottime++; 4871 tryagain = 1; 4872 break; 4873 } 4874 } 4875 } while (tryagain); 4876 4877 sf->nsf_flags |= NFSNSF_OK; 4878 off += (sf->nsf_numboots * sizeof (time_t)); 4879 4880 /* 4881 * Read through the file, building a list of records for grace 4882 * checking. 4883 * Each record is between sizeof (struct nfst_rec) and 4884 * sizeof (struct nfst_rec) + NFSV4_OPAQUELIMIT - 1 4885 * and is actually sizeof (struct nfst_rec) + nst_len - 1. 4886 */ 4887 tsp = (struct nfst_rec *)malloc(sizeof (struct nfst_rec) + 4888 NFSV4_OPAQUELIMIT - 1, M_TEMP, M_WAITOK); 4889 do { 4890 error = NFSD_RDWR(UIO_READ, NFSFPVNODE(sf->nsf_fp), 4891 (caddr_t)tsp, sizeof (struct nfst_rec) + NFSV4_OPAQUELIMIT - 1, 4892 off, UIO_SYSSPACE, 0, NFSFPCRED(sf->nsf_fp), &aresid, p); 4893 len = (sizeof (struct nfst_rec) + NFSV4_OPAQUELIMIT - 1) - aresid; 4894 if (error || (len > 0 && (len < sizeof (struct nfst_rec) || 4895 len < (sizeof (struct nfst_rec) + tsp->len - 1)))) { 4896 /* 4897 * Yuck, the file has been corrupted, so just return 4898 * after clearing out any restart state, so the grace period 4899 * is over. 4900 */ 4901 LIST_FOREACH_SAFE(sp, &sf->nsf_head, nst_list, nsp) { 4902 LIST_REMOVE(sp, nst_list); 4903 free(sp, M_TEMP); 4904 } 4905 free(tsp, M_TEMP); 4906 sf->nsf_flags &= ~NFSNSF_OK; 4907 free(sf->nsf_bootvals, M_TEMP); 4908 sf->nsf_bootvals = NULL; 4909 return; 4910 } 4911 if (len > 0) { 4912 off += sizeof (struct nfst_rec) + tsp->len - 1; 4913 /* 4914 * Search the list for a matching client. 4915 */ 4916 LIST_FOREACH(sp, &sf->nsf_head, nst_list) { 4917 if (tsp->len == sp->nst_len && 4918 !NFSBCMP(tsp->client, sp->nst_client, tsp->len)) 4919 break; 4920 } 4921 if (sp == LIST_END(&sf->nsf_head)) { 4922 sp = (struct nfsrv_stable *)malloc(tsp->len + 4923 sizeof (struct nfsrv_stable) - 1, M_TEMP, 4924 M_WAITOK); 4925 NFSBCOPY((caddr_t)tsp, (caddr_t)&sp->nst_rec, 4926 sizeof (struct nfst_rec) + tsp->len - 1); 4927 LIST_INSERT_HEAD(&sf->nsf_head, sp, nst_list); 4928 } else { 4929 if (tsp->flag == NFSNST_REVOKE) 4930 sp->nst_flag |= NFSNST_REVOKE; 4931 else 4932 /* 4933 * A subsequent timestamp indicates the client 4934 * did a setclientid/confirm and any previous 4935 * revoke is no longer relevant. 4936 */ 4937 sp->nst_flag &= ~NFSNST_REVOKE; 4938 } 4939 } 4940 } while (len > 0); 4941 free(tsp, M_TEMP); 4942 sf->nsf_flags = NFSNSF_OK; 4943 sf->nsf_eograce = NFSD_MONOSEC + sf->nsf_lease + 4944 NFSRV_LEASEDELTA; 4945 } 4946 4947 /* 4948 * Update the stable storage file, now that the grace period is over. 4949 */ 4950 void 4951 nfsrv_updatestable(NFSPROC_T *p) 4952 { 4953 struct nfsrv_stablefirst *sf = &nfsrv_stablefirst; 4954 struct nfsrv_stable *sp, *nsp; 4955 int i; 4956 struct nfsvattr nva; 4957 vnode_t vp; 4958 #if defined(__FreeBSD_version) && (__FreeBSD_version >= 500000) 4959 mount_t mp = NULL; 4960 #endif 4961 int error; 4962 4963 if (sf->nsf_fp == NULL || (sf->nsf_flags & NFSNSF_UPDATEDONE)) 4964 return; 4965 sf->nsf_flags |= NFSNSF_UPDATEDONE; 4966 /* 4967 * Ok, we need to rewrite the stable storage file. 4968 * - truncate to 0 length 4969 * - write the new first structure 4970 * - loop through the data structures, writing out any that 4971 * have timestamps older than the old boot 4972 */ 4973 if (sf->nsf_bootvals) { 4974 sf->nsf_numboots++; 4975 for (i = sf->nsf_numboots - 2; i >= 0; i--) 4976 sf->nsf_bootvals[i + 1] = sf->nsf_bootvals[i]; 4977 } else { 4978 sf->nsf_numboots = 1; 4979 sf->nsf_bootvals = (time_t *)malloc(sizeof (time_t), 4980 M_TEMP, M_WAITOK); 4981 } 4982 sf->nsf_bootvals[0] = nfsrvboottime; 4983 sf->nsf_lease = nfsrv_lease; 4984 NFSVNO_ATTRINIT(&nva); 4985 NFSVNO_SETATTRVAL(&nva, size, 0); 4986 vp = NFSFPVNODE(sf->nsf_fp); 4987 vn_start_write(vp, &mp, V_WAIT); 4988 if (NFSVOPLOCK(vp, LK_EXCLUSIVE) == 0) { 4989 error = nfsvno_setattr(vp, &nva, NFSFPCRED(sf->nsf_fp), p, 4990 NULL); 4991 NFSVOPUNLOCK(vp); 4992 } else 4993 error = EPERM; 4994 vn_finished_write(mp); 4995 if (!error) 4996 error = NFSD_RDWR(UIO_WRITE, vp, 4997 (caddr_t)&sf->nsf_rec, sizeof (struct nfsf_rec), (off_t)0, 4998 UIO_SYSSPACE, IO_SYNC, NFSFPCRED(sf->nsf_fp), NULL, p); 4999 if (!error) 5000 error = NFSD_RDWR(UIO_WRITE, vp, 5001 (caddr_t)sf->nsf_bootvals, 5002 sf->nsf_numboots * sizeof (time_t), 5003 (off_t)(sizeof (struct nfsf_rec)), 5004 UIO_SYSSPACE, IO_SYNC, NFSFPCRED(sf->nsf_fp), NULL, p); 5005 free(sf->nsf_bootvals, M_TEMP); 5006 sf->nsf_bootvals = NULL; 5007 if (error) { 5008 sf->nsf_flags &= ~NFSNSF_OK; 5009 printf("EEK! Can't write NfsV4 stable storage file\n"); 5010 return; 5011 } 5012 sf->nsf_flags |= NFSNSF_OK; 5013 5014 /* 5015 * Loop through the list and write out timestamp records for 5016 * any clients that successfully reclaimed state. 5017 */ 5018 LIST_FOREACH_SAFE(sp, &sf->nsf_head, nst_list, nsp) { 5019 if (sp->nst_flag & NFSNST_GOTSTATE) { 5020 nfsrv_writestable(sp->nst_client, sp->nst_len, 5021 NFSNST_NEWSTATE, p); 5022 sp->nst_clp->lc_flags |= LCL_STAMPEDSTABLE; 5023 } 5024 LIST_REMOVE(sp, nst_list); 5025 free(sp, M_TEMP); 5026 } 5027 nfsrv_backupstable(); 5028 } 5029 5030 /* 5031 * Append a record to the stable storage file. 5032 */ 5033 void 5034 nfsrv_writestable(u_char *client, int len, int flag, NFSPROC_T *p) 5035 { 5036 struct nfsrv_stablefirst *sf = &nfsrv_stablefirst; 5037 struct nfst_rec *sp; 5038 int error; 5039 5040 if (!(sf->nsf_flags & NFSNSF_OK) || sf->nsf_fp == NULL) 5041 return; 5042 sp = (struct nfst_rec *)malloc(sizeof (struct nfst_rec) + 5043 len - 1, M_TEMP, M_WAITOK); 5044 sp->len = len; 5045 NFSBCOPY(client, sp->client, len); 5046 sp->flag = flag; 5047 error = NFSD_RDWR(UIO_WRITE, NFSFPVNODE(sf->nsf_fp), 5048 (caddr_t)sp, sizeof (struct nfst_rec) + len - 1, (off_t)0, 5049 UIO_SYSSPACE, (IO_SYNC | IO_APPEND), NFSFPCRED(sf->nsf_fp), NULL, p); 5050 free(sp, M_TEMP); 5051 if (error) { 5052 sf->nsf_flags &= ~NFSNSF_OK; 5053 printf("EEK! Can't write NfsV4 stable storage file\n"); 5054 } 5055 } 5056 5057 /* 5058 * This function is called during the grace period to mark a client 5059 * that successfully reclaimed state. 5060 */ 5061 static void 5062 nfsrv_markstable(struct nfsclient *clp) 5063 { 5064 struct nfsrv_stable *sp; 5065 5066 /* 5067 * First find the client structure. 5068 */ 5069 LIST_FOREACH(sp, &nfsrv_stablefirst.nsf_head, nst_list) { 5070 if (sp->nst_len == clp->lc_idlen && 5071 !NFSBCMP(sp->nst_client, clp->lc_id, sp->nst_len)) 5072 break; 5073 } 5074 if (sp == LIST_END(&nfsrv_stablefirst.nsf_head)) 5075 return; 5076 5077 /* 5078 * Now, just mark it and set the nfsclient back pointer. 5079 */ 5080 sp->nst_flag |= NFSNST_GOTSTATE; 5081 sp->nst_clp = clp; 5082 } 5083 5084 /* 5085 * This function is called when a NFSv4.1 client does a ReclaimComplete. 5086 * Very similar to nfsrv_markstable(), except for the flag being set. 5087 */ 5088 static void 5089 nfsrv_markreclaim(struct nfsclient *clp) 5090 { 5091 struct nfsrv_stable *sp; 5092 5093 /* 5094 * First find the client structure. 5095 */ 5096 LIST_FOREACH(sp, &nfsrv_stablefirst.nsf_head, nst_list) { 5097 if (sp->nst_len == clp->lc_idlen && 5098 !NFSBCMP(sp->nst_client, clp->lc_id, sp->nst_len)) 5099 break; 5100 } 5101 if (sp == LIST_END(&nfsrv_stablefirst.nsf_head)) 5102 return; 5103 5104 /* 5105 * Now, just set the flag. 5106 */ 5107 sp->nst_flag |= NFSNST_RECLAIMED; 5108 } 5109 5110 /* 5111 * This function is called for a reclaim, to see if it gets grace. 5112 * It returns 0 if a reclaim is allowed, 1 otherwise. 5113 */ 5114 static int 5115 nfsrv_checkstable(struct nfsclient *clp) 5116 { 5117 struct nfsrv_stable *sp; 5118 5119 /* 5120 * First, find the entry for the client. 5121 */ 5122 LIST_FOREACH(sp, &nfsrv_stablefirst.nsf_head, nst_list) { 5123 if (sp->nst_len == clp->lc_idlen && 5124 !NFSBCMP(sp->nst_client, clp->lc_id, sp->nst_len)) 5125 break; 5126 } 5127 5128 /* 5129 * If not in the list, state was revoked or no state was issued 5130 * since the previous reboot, a reclaim is denied. 5131 */ 5132 if (sp == LIST_END(&nfsrv_stablefirst.nsf_head) || 5133 (sp->nst_flag & NFSNST_REVOKE) || 5134 !(nfsrv_stablefirst.nsf_flags & NFSNSF_OK)) 5135 return (1); 5136 return (0); 5137 } 5138 5139 /* 5140 * Test for and try to clear out a conflicting client. This is called by 5141 * nfsrv_lockctrl() and nfsrv_openctrl() when conflicts with other clients 5142 * a found. 5143 * The trick here is that it can't revoke a conflicting client with an 5144 * expired lease unless it holds the v4root lock, so... 5145 * If no v4root lock, get the lock and return 1 to indicate "try again". 5146 * Return 0 to indicate the conflict can't be revoked and 1 to indicate 5147 * the revocation worked and the conflicting client is "bye, bye", so it 5148 * can be tried again. 5149 * Return 2 to indicate that the vnode is VIRF_DOOMED after NFSVOPLOCK(). 5150 * Unlocks State before a non-zero value is returned. 5151 */ 5152 static int 5153 nfsrv_clientconflict(struct nfsclient *clp, int *haslockp, vnode_t vp, 5154 NFSPROC_T *p) 5155 { 5156 int gotlock, lktype = 0; 5157 5158 /* 5159 * If lease hasn't expired, we can't fix it. 5160 */ 5161 if (clp->lc_expiry >= NFSD_MONOSEC || 5162 !(nfsrv_stablefirst.nsf_flags & NFSNSF_UPDATEDONE)) 5163 return (0); 5164 if (*haslockp == 0) { 5165 NFSUNLOCKSTATE(); 5166 if (vp != NULL) { 5167 lktype = NFSVOPISLOCKED(vp); 5168 NFSVOPUNLOCK(vp); 5169 } 5170 NFSLOCKV4ROOTMUTEX(); 5171 nfsv4_relref(&nfsv4rootfs_lock); 5172 do { 5173 gotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 5174 NFSV4ROOTLOCKMUTEXPTR, NULL); 5175 } while (!gotlock); 5176 NFSUNLOCKV4ROOTMUTEX(); 5177 *haslockp = 1; 5178 if (vp != NULL) { 5179 NFSVOPLOCK(vp, lktype | LK_RETRY); 5180 if (VN_IS_DOOMED(vp)) 5181 return (2); 5182 } 5183 return (1); 5184 } 5185 NFSUNLOCKSTATE(); 5186 5187 /* 5188 * Ok, we can expire the conflicting client. 5189 */ 5190 nfsrv_writestable(clp->lc_id, clp->lc_idlen, NFSNST_REVOKE, p); 5191 nfsrv_backupstable(); 5192 nfsrv_cleanclient(clp, p); 5193 nfsrv_freedeleglist(&clp->lc_deleg); 5194 nfsrv_freedeleglist(&clp->lc_olddeleg); 5195 LIST_REMOVE(clp, lc_hash); 5196 nfsrv_zapclient(clp, p); 5197 return (1); 5198 } 5199 5200 /* 5201 * Resolve a delegation conflict. 5202 * Returns 0 to indicate the conflict was resolved without sleeping. 5203 * Return -1 to indicate that the caller should check for conflicts again. 5204 * Return > 0 for an error that should be returned, normally NFSERR_DELAY. 5205 * 5206 * Also, manipulate the nfsv4root_lock, as required. It isn't changed 5207 * for a return of 0, since there was no sleep and it could be required 5208 * later. It is released for a return of NFSERR_DELAY, since the caller 5209 * will return that error. It is released when a sleep was done waiting 5210 * for the delegation to be returned or expire (so that other nfsds can 5211 * handle ops). Then, it must be acquired for the write to stable storage. 5212 * (This function is somewhat similar to nfsrv_clientconflict(), but 5213 * the semantics differ in a couple of subtle ways. The return of 0 5214 * indicates the conflict was resolved without sleeping here, not 5215 * that the conflict can't be resolved and the handling of nfsv4root_lock 5216 * differs, as noted above.) 5217 * Unlocks State before returning a non-zero value. 5218 */ 5219 static int 5220 nfsrv_delegconflict(struct nfsstate *stp, int *haslockp, NFSPROC_T *p, 5221 vnode_t vp) 5222 { 5223 struct nfsclient *clp = stp->ls_clp; 5224 int gotlock, error, lktype = 0, retrycnt, zapped_clp; 5225 nfsv4stateid_t tstateid; 5226 fhandle_t tfh; 5227 5228 /* 5229 * If the conflict is with an old delegation... 5230 */ 5231 if (stp->ls_flags & NFSLCK_OLDDELEG) { 5232 /* 5233 * You can delete it, if it has expired. 5234 */ 5235 if (clp->lc_delegtime < NFSD_MONOSEC) { 5236 nfsrv_freedeleg(stp); 5237 NFSUNLOCKSTATE(); 5238 error = -1; 5239 goto out; 5240 } 5241 NFSUNLOCKSTATE(); 5242 /* 5243 * During this delay, the old delegation could expire or it 5244 * could be recovered by the client via an Open with 5245 * CLAIM_DELEGATE_PREV. 5246 * Release the nfsv4root_lock, if held. 5247 */ 5248 if (*haslockp) { 5249 *haslockp = 0; 5250 NFSLOCKV4ROOTMUTEX(); 5251 nfsv4_unlock(&nfsv4rootfs_lock, 1); 5252 NFSUNLOCKV4ROOTMUTEX(); 5253 } 5254 error = NFSERR_DELAY; 5255 goto out; 5256 } 5257 5258 /* 5259 * It's a current delegation, so: 5260 * - check to see if the delegation has expired 5261 * - if so, get the v4root lock and then expire it 5262 */ 5263 if (!(stp->ls_flags & NFSLCK_DELEGRECALL)) { 5264 /* 5265 * - do a recall callback, since not yet done 5266 * For now, never allow truncate to be set. To use 5267 * truncate safely, it must be guaranteed that the 5268 * Remove, Rename or Setattr with size of 0 will 5269 * succeed and that would require major changes to 5270 * the VFS/Vnode OPs. 5271 * Set the expiry time large enough so that it won't expire 5272 * until after the callback, then set it correctly, once 5273 * the callback is done. (The delegation will now time 5274 * out whether or not the Recall worked ok. The timeout 5275 * will be extended when ops are done on the delegation 5276 * stateid, up to the timelimit.) 5277 */ 5278 stp->ls_delegtime = NFSD_MONOSEC + (2 * nfsrv_lease) + 5279 NFSRV_LEASEDELTA; 5280 stp->ls_delegtimelimit = NFSD_MONOSEC + (6 * nfsrv_lease) + 5281 NFSRV_LEASEDELTA; 5282 stp->ls_flags |= NFSLCK_DELEGRECALL; 5283 5284 /* 5285 * Loop NFSRV_CBRETRYCNT times while the CBRecall replies 5286 * NFSERR_BADSTATEID or NFSERR_BADHANDLE. This is done 5287 * in order to try and avoid a race that could happen 5288 * when a CBRecall request passed the Open reply with 5289 * the delegation in it when transitting the network. 5290 * Since nfsrv_docallback will sleep, don't use stp after 5291 * the call. 5292 */ 5293 NFSBCOPY((caddr_t)&stp->ls_stateid, (caddr_t)&tstateid, 5294 sizeof (tstateid)); 5295 NFSBCOPY((caddr_t)&stp->ls_lfp->lf_fh, (caddr_t)&tfh, 5296 sizeof (tfh)); 5297 NFSUNLOCKSTATE(); 5298 if (*haslockp) { 5299 *haslockp = 0; 5300 NFSLOCKV4ROOTMUTEX(); 5301 nfsv4_unlock(&nfsv4rootfs_lock, 1); 5302 NFSUNLOCKV4ROOTMUTEX(); 5303 } 5304 retrycnt = 0; 5305 do { 5306 error = nfsrv_docallback(clp, NFSV4OP_CBRECALL, 5307 &tstateid, 0, &tfh, NULL, NULL, 0, p); 5308 retrycnt++; 5309 } while ((error == NFSERR_BADSTATEID || 5310 error == NFSERR_BADHANDLE) && retrycnt < NFSV4_CBRETRYCNT); 5311 error = NFSERR_DELAY; 5312 goto out; 5313 } 5314 5315 if (clp->lc_expiry >= NFSD_MONOSEC && 5316 stp->ls_delegtime >= NFSD_MONOSEC) { 5317 NFSUNLOCKSTATE(); 5318 /* 5319 * A recall has been done, but it has not yet expired. 5320 * So, RETURN_DELAY. 5321 */ 5322 if (*haslockp) { 5323 *haslockp = 0; 5324 NFSLOCKV4ROOTMUTEX(); 5325 nfsv4_unlock(&nfsv4rootfs_lock, 1); 5326 NFSUNLOCKV4ROOTMUTEX(); 5327 } 5328 error = NFSERR_DELAY; 5329 goto out; 5330 } 5331 5332 /* 5333 * If we don't yet have the lock, just get it and then return, 5334 * since we need that before deleting expired state, such as 5335 * this delegation. 5336 * When getting the lock, unlock the vnode, so other nfsds that 5337 * are in progress, won't get stuck waiting for the vnode lock. 5338 */ 5339 if (*haslockp == 0) { 5340 NFSUNLOCKSTATE(); 5341 if (vp != NULL) { 5342 lktype = NFSVOPISLOCKED(vp); 5343 NFSVOPUNLOCK(vp); 5344 } 5345 NFSLOCKV4ROOTMUTEX(); 5346 nfsv4_relref(&nfsv4rootfs_lock); 5347 do { 5348 gotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 5349 NFSV4ROOTLOCKMUTEXPTR, NULL); 5350 } while (!gotlock); 5351 NFSUNLOCKV4ROOTMUTEX(); 5352 *haslockp = 1; 5353 if (vp != NULL) { 5354 NFSVOPLOCK(vp, lktype | LK_RETRY); 5355 if (VN_IS_DOOMED(vp)) { 5356 *haslockp = 0; 5357 NFSLOCKV4ROOTMUTEX(); 5358 nfsv4_unlock(&nfsv4rootfs_lock, 1); 5359 NFSUNLOCKV4ROOTMUTEX(); 5360 error = NFSERR_PERM; 5361 goto out; 5362 } 5363 } 5364 error = -1; 5365 goto out; 5366 } 5367 5368 NFSUNLOCKSTATE(); 5369 /* 5370 * Ok, we can delete the expired delegation. 5371 * First, write the Revoke record to stable storage and then 5372 * clear out the conflict. 5373 * Since all other nfsd threads are now blocked, we can safely 5374 * sleep without the state changing. 5375 */ 5376 nfsrv_writestable(clp->lc_id, clp->lc_idlen, NFSNST_REVOKE, p); 5377 nfsrv_backupstable(); 5378 if (clp->lc_expiry < NFSD_MONOSEC) { 5379 nfsrv_cleanclient(clp, p); 5380 nfsrv_freedeleglist(&clp->lc_deleg); 5381 nfsrv_freedeleglist(&clp->lc_olddeleg); 5382 LIST_REMOVE(clp, lc_hash); 5383 zapped_clp = 1; 5384 } else { 5385 nfsrv_freedeleg(stp); 5386 zapped_clp = 0; 5387 } 5388 if (zapped_clp) 5389 nfsrv_zapclient(clp, p); 5390 error = -1; 5391 5392 out: 5393 NFSEXITCODE(error); 5394 return (error); 5395 } 5396 5397 /* 5398 * Check for a remove allowed, if remove is set to 1 and get rid of 5399 * delegations. 5400 */ 5401 int 5402 nfsrv_checkremove(vnode_t vp, int remove, struct nfsrv_descript *nd, 5403 nfsquad_t clientid, NFSPROC_T *p) 5404 { 5405 struct nfsclient *clp; 5406 struct nfsstate *stp; 5407 struct nfslockfile *lfp; 5408 int error, haslock = 0; 5409 fhandle_t nfh; 5410 5411 clp = NULL; 5412 /* 5413 * First, get the lock file structure. 5414 * (A return of -1 means no associated state, so remove ok.) 5415 */ 5416 error = nfsrv_getlockfh(vp, NFSLCK_CHECK, NULL, &nfh, p); 5417 tryagain: 5418 NFSLOCKSTATE(); 5419 if (error == 0 && clientid.qval != 0) 5420 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 5421 (nfsquad_t)((u_quad_t)0), 0, nd, p); 5422 if (!error) 5423 error = nfsrv_getlockfile(NFSLCK_CHECK, NULL, &lfp, &nfh, 0); 5424 if (error) { 5425 NFSUNLOCKSTATE(); 5426 if (haslock) { 5427 NFSLOCKV4ROOTMUTEX(); 5428 nfsv4_unlock(&nfsv4rootfs_lock, 1); 5429 NFSUNLOCKV4ROOTMUTEX(); 5430 } 5431 if (error == -1) 5432 error = 0; 5433 goto out; 5434 } 5435 5436 /* 5437 * Now, we must Recall any delegations. 5438 */ 5439 error = nfsrv_cleandeleg(vp, lfp, clp, &haslock, p); 5440 if (error) { 5441 /* 5442 * nfsrv_cleandeleg() unlocks state for non-zero 5443 * return. 5444 */ 5445 if (error == -1) 5446 goto tryagain; 5447 if (haslock) { 5448 NFSLOCKV4ROOTMUTEX(); 5449 nfsv4_unlock(&nfsv4rootfs_lock, 1); 5450 NFSUNLOCKV4ROOTMUTEX(); 5451 } 5452 goto out; 5453 } 5454 5455 /* 5456 * Now, look for a conflicting open share. 5457 */ 5458 if (remove) { 5459 /* 5460 * If the entry in the directory was the last reference to the 5461 * corresponding filesystem object, the object can be destroyed 5462 * */ 5463 if(lfp->lf_usecount>1) 5464 LIST_FOREACH(stp, &lfp->lf_open, ls_file) { 5465 if (stp->ls_flags & NFSLCK_WRITEDENY) { 5466 error = NFSERR_FILEOPEN; 5467 break; 5468 } 5469 } 5470 } 5471 5472 NFSUNLOCKSTATE(); 5473 if (haslock) { 5474 NFSLOCKV4ROOTMUTEX(); 5475 nfsv4_unlock(&nfsv4rootfs_lock, 1); 5476 NFSUNLOCKV4ROOTMUTEX(); 5477 } 5478 5479 out: 5480 NFSEXITCODE(error); 5481 return (error); 5482 } 5483 5484 /* 5485 * Clear out all delegations for the file referred to by lfp. 5486 * May return NFSERR_DELAY, if there will be a delay waiting for 5487 * delegations to expire. 5488 * Returns -1 to indicate it slept while recalling a delegation. 5489 * This function has the side effect of deleting the nfslockfile structure, 5490 * if it no longer has associated state and didn't have to sleep. 5491 * Unlocks State before a non-zero value is returned. 5492 */ 5493 static int 5494 nfsrv_cleandeleg(vnode_t vp, struct nfslockfile *lfp, 5495 struct nfsclient *clp, int *haslockp, NFSPROC_T *p) 5496 { 5497 struct nfsstate *stp, *nstp; 5498 int ret = 0; 5499 5500 stp = LIST_FIRST(&lfp->lf_deleg); 5501 while (stp != LIST_END(&lfp->lf_deleg)) { 5502 nstp = LIST_NEXT(stp, ls_file); 5503 if (stp->ls_clp != clp) { 5504 ret = nfsrv_delegconflict(stp, haslockp, p, vp); 5505 if (ret) { 5506 /* 5507 * nfsrv_delegconflict() unlocks state 5508 * when it returns non-zero. 5509 */ 5510 goto out; 5511 } 5512 } 5513 stp = nstp; 5514 } 5515 out: 5516 NFSEXITCODE(ret); 5517 return (ret); 5518 } 5519 5520 /* 5521 * There are certain operations that, when being done outside of NFSv4, 5522 * require that any NFSv4 delegation for the file be recalled. 5523 * This function is to be called for those cases: 5524 * VOP_RENAME() - When a delegation is being recalled for any reason, 5525 * the client may have to do Opens against the server, using the file's 5526 * final component name. If the file has been renamed on the server, 5527 * that component name will be incorrect and the Open will fail. 5528 * VOP_REMOVE() - Theoretically, a client could Open a file after it has 5529 * been removed on the server, if there is a delegation issued to 5530 * that client for the file. I say "theoretically" since clients 5531 * normally do an Access Op before the Open and that Access Op will 5532 * fail with ESTALE. Note that NFSv2 and 3 don't even do Opens, so 5533 * they will detect the file's removal in the same manner. (There is 5534 * one case where RFC3530 allows a client to do an Open without first 5535 * doing an Access Op, which is passage of a check against the ACE 5536 * returned with a Write delegation, but current practice is to ignore 5537 * the ACE and always do an Access Op.) 5538 * Since the functions can only be called with an unlocked vnode, this 5539 * can't be done at this time. 5540 * VOP_ADVLOCK() - When a client holds a delegation, it can issue byte range 5541 * locks locally in the client, which are not visible to the server. To 5542 * deal with this, issuing of delegations for a vnode must be disabled 5543 * and all delegations for the vnode recalled. This is done via the 5544 * second function, using the VV_DISABLEDELEG vflag on the vnode. 5545 */ 5546 void 5547 nfsd_recalldelegation(vnode_t vp, NFSPROC_T *p) 5548 { 5549 time_t starttime; 5550 int error; 5551 5552 /* 5553 * First, check to see if the server is currently running and it has 5554 * been called for a regular file when issuing delegations. 5555 */ 5556 if (newnfs_numnfsd == 0 || vp->v_type != VREG || 5557 nfsrv_issuedelegs == 0) 5558 return; 5559 5560 KASSERT((NFSVOPISLOCKED(vp) != LK_EXCLUSIVE), ("vp %p is locked", vp)); 5561 /* 5562 * First, get a reference on the nfsv4rootfs_lock so that an 5563 * exclusive lock cannot be acquired by another thread. 5564 */ 5565 NFSLOCKV4ROOTMUTEX(); 5566 nfsv4_getref(&nfsv4rootfs_lock, NULL, NFSV4ROOTLOCKMUTEXPTR, NULL); 5567 NFSUNLOCKV4ROOTMUTEX(); 5568 5569 /* 5570 * Now, call nfsrv_checkremove() in a loop while it returns 5571 * NFSERR_DELAY. Return upon any other error or when timed out. 5572 */ 5573 starttime = NFSD_MONOSEC; 5574 do { 5575 if (NFSVOPLOCK(vp, LK_EXCLUSIVE) == 0) { 5576 error = nfsrv_checkremove(vp, 0, NULL, 5577 (nfsquad_t)((u_quad_t)0), p); 5578 NFSVOPUNLOCK(vp); 5579 } else 5580 error = EPERM; 5581 if (error == NFSERR_DELAY) { 5582 if (NFSD_MONOSEC - starttime > NFS_REMOVETIMEO) 5583 break; 5584 /* Sleep for a short period of time */ 5585 (void) nfs_catnap(PZERO, 0, "nfsremove"); 5586 } 5587 } while (error == NFSERR_DELAY); 5588 NFSLOCKV4ROOTMUTEX(); 5589 nfsv4_relref(&nfsv4rootfs_lock); 5590 NFSUNLOCKV4ROOTMUTEX(); 5591 } 5592 5593 void 5594 nfsd_disabledelegation(vnode_t vp, NFSPROC_T *p) 5595 { 5596 5597 #ifdef VV_DISABLEDELEG 5598 /* 5599 * First, flag issuance of delegations disabled. 5600 */ 5601 atomic_set_long(&vp->v_vflag, VV_DISABLEDELEG); 5602 #endif 5603 5604 /* 5605 * Then call nfsd_recalldelegation() to get rid of all extant 5606 * delegations. 5607 */ 5608 nfsd_recalldelegation(vp, p); 5609 } 5610 5611 /* 5612 * Check for conflicting locks, etc. and then get rid of delegations. 5613 * (At one point I thought that I should get rid of delegations for any 5614 * Setattr, since it could potentially disallow the I/O op (read or write) 5615 * allowed by the delegation. However, Setattr Ops that aren't changing 5616 * the size get a stateid of all 0s, so you can't tell if it is a delegation 5617 * for the same client or a different one, so I decided to only get rid 5618 * of delegations for other clients when the size is being changed.) 5619 * In general, a Setattr can disable NFS I/O Ops that are outstanding, such 5620 * as Write backs, even if there is no delegation, so it really isn't any 5621 * different?) 5622 */ 5623 int 5624 nfsrv_checksetattr(vnode_t vp, struct nfsrv_descript *nd, 5625 nfsv4stateid_t *stateidp, struct nfsvattr *nvap, nfsattrbit_t *attrbitp, 5626 struct nfsexstuff *exp, NFSPROC_T *p) 5627 { 5628 struct nfsstate st, *stp = &st; 5629 struct nfslock lo, *lop = &lo; 5630 int error = 0; 5631 nfsquad_t clientid; 5632 5633 if (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_SIZE)) { 5634 stp->ls_flags = (NFSLCK_CHECK | NFSLCK_WRITEACCESS); 5635 lop->lo_first = nvap->na_size; 5636 } else { 5637 stp->ls_flags = 0; 5638 lop->lo_first = 0; 5639 } 5640 if (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_OWNER) || 5641 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_OWNERGROUP) || 5642 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_MODE) || 5643 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_ACL)) 5644 stp->ls_flags |= NFSLCK_SETATTR; 5645 if (stp->ls_flags == 0) 5646 goto out; 5647 lop->lo_end = NFS64BITSSET; 5648 lop->lo_flags = NFSLCK_WRITE; 5649 stp->ls_ownerlen = 0; 5650 stp->ls_op = NULL; 5651 stp->ls_uid = nd->nd_cred->cr_uid; 5652 stp->ls_stateid.seqid = stateidp->seqid; 5653 clientid.lval[0] = stp->ls_stateid.other[0] = stateidp->other[0]; 5654 clientid.lval[1] = stp->ls_stateid.other[1] = stateidp->other[1]; 5655 stp->ls_stateid.other[2] = stateidp->other[2]; 5656 error = nfsrv_lockctrl(vp, &stp, &lop, NULL, clientid, 5657 stateidp, exp, nd, p); 5658 5659 out: 5660 NFSEXITCODE2(error, nd); 5661 return (error); 5662 } 5663 5664 /* 5665 * Check for a write delegation and do a CBGETATTR if there is one, updating 5666 * the attributes, as required. 5667 * Should I return an error if I can't get the attributes? (For now, I'll 5668 * just return ok. 5669 */ 5670 int 5671 nfsrv_checkgetattr(struct nfsrv_descript *nd, vnode_t vp, 5672 struct nfsvattr *nvap, nfsattrbit_t *attrbitp, NFSPROC_T *p) 5673 { 5674 struct nfsstate *stp; 5675 struct nfslockfile *lfp; 5676 struct nfsclient *clp; 5677 struct nfsvattr nva; 5678 fhandle_t nfh; 5679 int error = 0; 5680 nfsattrbit_t cbbits; 5681 u_quad_t delegfilerev; 5682 5683 NFSCBGETATTR_ATTRBIT(attrbitp, &cbbits); 5684 if (!NFSNONZERO_ATTRBIT(&cbbits)) 5685 goto out; 5686 if (nfsrv_writedelegcnt == 0) 5687 goto out; 5688 5689 /* 5690 * Get the lock file structure. 5691 * (A return of -1 means no associated state, so return ok.) 5692 */ 5693 error = nfsrv_getlockfh(vp, NFSLCK_CHECK, NULL, &nfh, p); 5694 NFSLOCKSTATE(); 5695 if (!error) 5696 error = nfsrv_getlockfile(NFSLCK_CHECK, NULL, &lfp, &nfh, 0); 5697 if (error) { 5698 NFSUNLOCKSTATE(); 5699 if (error == -1) 5700 error = 0; 5701 goto out; 5702 } 5703 5704 /* 5705 * Now, look for a write delegation. 5706 */ 5707 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) { 5708 if (stp->ls_flags & NFSLCK_DELEGWRITE) 5709 break; 5710 } 5711 if (stp == LIST_END(&lfp->lf_deleg)) { 5712 NFSUNLOCKSTATE(); 5713 goto out; 5714 } 5715 clp = stp->ls_clp; 5716 5717 /* If the clientid is not confirmed, ignore the delegation. */ 5718 if (clp->lc_flags & LCL_NEEDSCONFIRM) { 5719 NFSUNLOCKSTATE(); 5720 goto out; 5721 } 5722 5723 delegfilerev = stp->ls_filerev; 5724 /* 5725 * If the Write delegation was issued as a part of this Compound RPC 5726 * or if we have an Implied Clientid (used in a previous Op in this 5727 * compound) and it is the client the delegation was issued to, 5728 * just return ok. 5729 * I also assume that it is from the same client iff the network 5730 * host IP address is the same as the callback address. (Not 5731 * exactly correct by the RFC, but avoids a lot of Getattr 5732 * callbacks.) 5733 */ 5734 if (nd->nd_compref == stp->ls_compref || 5735 ((nd->nd_flag & ND_IMPLIEDCLID) && 5736 clp->lc_clientid.qval == nd->nd_clientid.qval) || 5737 nfsaddr2_match(clp->lc_req.nr_nam, nd->nd_nam)) { 5738 NFSUNLOCKSTATE(); 5739 goto out; 5740 } 5741 5742 /* 5743 * We are now done with the delegation state structure, 5744 * so the statelock can be released and we can now tsleep(). 5745 */ 5746 5747 /* 5748 * Now, we must do the CB Getattr callback, to see if Change or Size 5749 * has changed. 5750 */ 5751 if (clp->lc_expiry >= NFSD_MONOSEC) { 5752 NFSUNLOCKSTATE(); 5753 NFSVNO_ATTRINIT(&nva); 5754 nva.na_filerev = NFS64BITSSET; 5755 error = nfsrv_docallback(clp, NFSV4OP_CBGETATTR, NULL, 5756 0, &nfh, &nva, &cbbits, 0, p); 5757 if (!error) { 5758 if ((nva.na_filerev != NFS64BITSSET && 5759 nva.na_filerev > delegfilerev) || 5760 (NFSVNO_ISSETSIZE(&nva) && 5761 nva.na_size != nvap->na_size)) { 5762 error = nfsvno_updfilerev(vp, nvap, nd, p); 5763 if (NFSVNO_ISSETSIZE(&nva)) 5764 nvap->na_size = nva.na_size; 5765 } 5766 } else 5767 error = 0; /* Ignore callback errors for now. */ 5768 } else { 5769 NFSUNLOCKSTATE(); 5770 } 5771 5772 out: 5773 NFSEXITCODE2(error, nd); 5774 return (error); 5775 } 5776 5777 /* 5778 * This function looks for openowners that haven't had any opens for 5779 * a while and throws them away. Called by an nfsd when NFSNSF_NOOPENS 5780 * is set. 5781 */ 5782 void 5783 nfsrv_throwawayopens(NFSPROC_T *p) 5784 { 5785 struct nfsclient *clp, *nclp; 5786 struct nfsstate *stp, *nstp; 5787 int i; 5788 5789 NFSLOCKSTATE(); 5790 nfsrv_stablefirst.nsf_flags &= ~NFSNSF_NOOPENS; 5791 /* 5792 * For each client... 5793 */ 5794 for (i = 0; i < nfsrv_clienthashsize; i++) { 5795 LIST_FOREACH_SAFE(clp, &nfsclienthash[i], lc_hash, nclp) { 5796 LIST_FOREACH_SAFE(stp, &clp->lc_open, ls_list, nstp) { 5797 if (LIST_EMPTY(&stp->ls_open) && 5798 (stp->ls_noopens > NFSNOOPEN || 5799 (nfsrv_openpluslock * 2) > 5800 nfsrv_v4statelimit)) 5801 nfsrv_freeopenowner(stp, 0, p); 5802 } 5803 } 5804 } 5805 NFSUNLOCKSTATE(); 5806 } 5807 5808 /* 5809 * This function checks to see if the credentials are the same. 5810 * Returns 1 for not same, 0 otherwise. 5811 */ 5812 static int 5813 nfsrv_notsamecredname(struct nfsrv_descript *nd, struct nfsclient *clp) 5814 { 5815 5816 if (nd->nd_flag & ND_GSS) { 5817 if (!(clp->lc_flags & LCL_GSS)) 5818 return (1); 5819 if (clp->lc_flags & LCL_NAME) { 5820 if (nd->nd_princlen != clp->lc_namelen || 5821 NFSBCMP(nd->nd_principal, clp->lc_name, 5822 clp->lc_namelen)) 5823 return (1); 5824 else 5825 return (0); 5826 } 5827 if (nd->nd_cred->cr_uid == clp->lc_uid) 5828 return (0); 5829 else 5830 return (1); 5831 } else if (clp->lc_flags & LCL_GSS) 5832 return (1); 5833 /* 5834 * For AUTH_SYS, allow the same uid or root. (This is underspecified 5835 * in RFC3530, which talks about principals, but doesn't say anything 5836 * about uids for AUTH_SYS.) 5837 */ 5838 if (nd->nd_cred->cr_uid == clp->lc_uid || nd->nd_cred->cr_uid == 0) 5839 return (0); 5840 else 5841 return (1); 5842 } 5843 5844 /* 5845 * Calculate the lease expiry time. 5846 */ 5847 static time_t 5848 nfsrv_leaseexpiry(void) 5849 { 5850 5851 if (nfsrv_stablefirst.nsf_eograce > NFSD_MONOSEC) 5852 return (NFSD_MONOSEC + 2 * (nfsrv_lease + NFSRV_LEASEDELTA)); 5853 return (NFSD_MONOSEC + nfsrv_lease + NFSRV_LEASEDELTA); 5854 } 5855 5856 /* 5857 * Delay the delegation timeout as far as ls_delegtimelimit, as required. 5858 */ 5859 static void 5860 nfsrv_delaydelegtimeout(struct nfsstate *stp) 5861 { 5862 5863 if ((stp->ls_flags & NFSLCK_DELEGRECALL) == 0) 5864 return; 5865 5866 if ((stp->ls_delegtime + 15) > NFSD_MONOSEC && 5867 stp->ls_delegtime < stp->ls_delegtimelimit) { 5868 stp->ls_delegtime += nfsrv_lease; 5869 if (stp->ls_delegtime > stp->ls_delegtimelimit) 5870 stp->ls_delegtime = stp->ls_delegtimelimit; 5871 } 5872 } 5873 5874 /* 5875 * This function checks to see if there is any other state associated 5876 * with the openowner for this Open. 5877 * It returns 1 if there is no other state, 0 otherwise. 5878 */ 5879 static int 5880 nfsrv_nootherstate(struct nfsstate *stp) 5881 { 5882 struct nfsstate *tstp; 5883 5884 LIST_FOREACH(tstp, &stp->ls_openowner->ls_open, ls_list) { 5885 if (tstp != stp || !LIST_EMPTY(&tstp->ls_lock)) 5886 return (0); 5887 } 5888 return (1); 5889 } 5890 5891 /* 5892 * Create a list of lock deltas (changes to local byte range locking 5893 * that can be rolled back using the list) and apply the changes via 5894 * nfsvno_advlock(). Optionally, lock the list. It is expected that either 5895 * the rollback or update function will be called after this. 5896 * It returns an error (and rolls back, as required), if any nfsvno_advlock() 5897 * call fails. If it returns an error, it will unlock the list. 5898 */ 5899 static int 5900 nfsrv_locallock(vnode_t vp, struct nfslockfile *lfp, int flags, 5901 uint64_t first, uint64_t end, struct nfslockconflict *cfp, NFSPROC_T *p) 5902 { 5903 struct nfslock *lop, *nlop; 5904 int error = 0; 5905 5906 /* Loop through the list of locks. */ 5907 lop = LIST_FIRST(&lfp->lf_locallock); 5908 while (first < end && lop != NULL) { 5909 nlop = LIST_NEXT(lop, lo_lckowner); 5910 if (first >= lop->lo_end) { 5911 /* not there yet */ 5912 lop = nlop; 5913 } else if (first < lop->lo_first) { 5914 /* new one starts before entry in list */ 5915 if (end <= lop->lo_first) { 5916 /* no overlap between old and new */ 5917 error = nfsrv_dolocal(vp, lfp, flags, 5918 NFSLCK_UNLOCK, first, end, cfp, p); 5919 if (error != 0) 5920 break; 5921 first = end; 5922 } else { 5923 /* handle fragment overlapped with new one */ 5924 error = nfsrv_dolocal(vp, lfp, flags, 5925 NFSLCK_UNLOCK, first, lop->lo_first, cfp, 5926 p); 5927 if (error != 0) 5928 break; 5929 first = lop->lo_first; 5930 } 5931 } else { 5932 /* new one overlaps this entry in list */ 5933 if (end <= lop->lo_end) { 5934 /* overlaps all of new one */ 5935 error = nfsrv_dolocal(vp, lfp, flags, 5936 lop->lo_flags, first, end, cfp, p); 5937 if (error != 0) 5938 break; 5939 first = end; 5940 } else { 5941 /* handle fragment overlapped with new one */ 5942 error = nfsrv_dolocal(vp, lfp, flags, 5943 lop->lo_flags, first, lop->lo_end, cfp, p); 5944 if (error != 0) 5945 break; 5946 first = lop->lo_end; 5947 lop = nlop; 5948 } 5949 } 5950 } 5951 if (first < end && error == 0) 5952 /* handle fragment past end of list */ 5953 error = nfsrv_dolocal(vp, lfp, flags, NFSLCK_UNLOCK, first, 5954 end, cfp, p); 5955 5956 NFSEXITCODE(error); 5957 return (error); 5958 } 5959 5960 /* 5961 * Local lock unlock. Unlock all byte ranges that are no longer locked 5962 * by NFSv4. To do this, unlock any subranges of first-->end that 5963 * do not overlap with the byte ranges of any lock in the lfp->lf_lock 5964 * list. This list has all locks for the file held by other 5965 * <clientid, lockowner> tuples. The list is ordered by increasing 5966 * lo_first value, but may have entries that overlap each other, for 5967 * the case of read locks. 5968 */ 5969 static void 5970 nfsrv_localunlock(vnode_t vp, struct nfslockfile *lfp, uint64_t init_first, 5971 uint64_t init_end, NFSPROC_T *p) 5972 { 5973 struct nfslock *lop; 5974 uint64_t first, end, prevfirst __unused; 5975 5976 first = init_first; 5977 end = init_end; 5978 while (first < init_end) { 5979 /* Loop through all nfs locks, adjusting first and end */ 5980 prevfirst = 0; 5981 LIST_FOREACH(lop, &lfp->lf_lock, lo_lckfile) { 5982 KASSERT(prevfirst <= lop->lo_first, 5983 ("nfsv4 locks out of order")); 5984 KASSERT(lop->lo_first < lop->lo_end, 5985 ("nfsv4 bogus lock")); 5986 prevfirst = lop->lo_first; 5987 if (first >= lop->lo_first && 5988 first < lop->lo_end) 5989 /* 5990 * Overlaps with initial part, so trim 5991 * off that initial part by moving first past 5992 * it. 5993 */ 5994 first = lop->lo_end; 5995 else if (end > lop->lo_first && 5996 lop->lo_first > first) { 5997 /* 5998 * This lock defines the end of the 5999 * segment to unlock, so set end to the 6000 * start of it and break out of the loop. 6001 */ 6002 end = lop->lo_first; 6003 break; 6004 } 6005 if (first >= end) 6006 /* 6007 * There is no segment left to do, so 6008 * break out of this loop and then exit 6009 * the outer while() since first will be set 6010 * to end, which must equal init_end here. 6011 */ 6012 break; 6013 } 6014 if (first < end) { 6015 /* Unlock this segment */ 6016 (void) nfsrv_dolocal(vp, lfp, NFSLCK_UNLOCK, 6017 NFSLCK_READ, first, end, NULL, p); 6018 nfsrv_locallock_commit(lfp, NFSLCK_UNLOCK, 6019 first, end); 6020 } 6021 /* 6022 * Now move past this segment and look for any further 6023 * segment in the range, if there is one. 6024 */ 6025 first = end; 6026 end = init_end; 6027 } 6028 } 6029 6030 /* 6031 * Do the local lock operation and update the rollback list, as required. 6032 * Perform the rollback and return the error if nfsvno_advlock() fails. 6033 */ 6034 static int 6035 nfsrv_dolocal(vnode_t vp, struct nfslockfile *lfp, int flags, int oldflags, 6036 uint64_t first, uint64_t end, struct nfslockconflict *cfp, NFSPROC_T *p) 6037 { 6038 struct nfsrollback *rlp; 6039 int error = 0, ltype, oldltype; 6040 6041 if (flags & NFSLCK_WRITE) 6042 ltype = F_WRLCK; 6043 else if (flags & NFSLCK_READ) 6044 ltype = F_RDLCK; 6045 else 6046 ltype = F_UNLCK; 6047 if (oldflags & NFSLCK_WRITE) 6048 oldltype = F_WRLCK; 6049 else if (oldflags & NFSLCK_READ) 6050 oldltype = F_RDLCK; 6051 else 6052 oldltype = F_UNLCK; 6053 if (ltype == oldltype || (oldltype == F_WRLCK && ltype == F_RDLCK)) 6054 /* nothing to do */ 6055 goto out; 6056 error = nfsvno_advlock(vp, ltype, first, end, p); 6057 if (error != 0) { 6058 if (cfp != NULL) { 6059 cfp->cl_clientid.lval[0] = 0; 6060 cfp->cl_clientid.lval[1] = 0; 6061 cfp->cl_first = 0; 6062 cfp->cl_end = NFS64BITSSET; 6063 cfp->cl_flags = NFSLCK_WRITE; 6064 cfp->cl_ownerlen = 5; 6065 NFSBCOPY("LOCAL", cfp->cl_owner, 5); 6066 } 6067 nfsrv_locallock_rollback(vp, lfp, p); 6068 } else if (ltype != F_UNLCK) { 6069 rlp = malloc(sizeof (struct nfsrollback), M_NFSDROLLBACK, 6070 M_WAITOK); 6071 rlp->rlck_first = first; 6072 rlp->rlck_end = end; 6073 rlp->rlck_type = oldltype; 6074 LIST_INSERT_HEAD(&lfp->lf_rollback, rlp, rlck_list); 6075 } 6076 6077 out: 6078 NFSEXITCODE(error); 6079 return (error); 6080 } 6081 6082 /* 6083 * Roll back local lock changes and free up the rollback list. 6084 */ 6085 static void 6086 nfsrv_locallock_rollback(vnode_t vp, struct nfslockfile *lfp, NFSPROC_T *p) 6087 { 6088 struct nfsrollback *rlp, *nrlp; 6089 6090 LIST_FOREACH_SAFE(rlp, &lfp->lf_rollback, rlck_list, nrlp) { 6091 (void) nfsvno_advlock(vp, rlp->rlck_type, rlp->rlck_first, 6092 rlp->rlck_end, p); 6093 free(rlp, M_NFSDROLLBACK); 6094 } 6095 LIST_INIT(&lfp->lf_rollback); 6096 } 6097 6098 /* 6099 * Update local lock list and delete rollback list (ie now committed to the 6100 * local locks). Most of the work is done by the internal function. 6101 */ 6102 static void 6103 nfsrv_locallock_commit(struct nfslockfile *lfp, int flags, uint64_t first, 6104 uint64_t end) 6105 { 6106 struct nfsrollback *rlp, *nrlp; 6107 struct nfslock *new_lop, *other_lop; 6108 6109 new_lop = malloc(sizeof (struct nfslock), M_NFSDLOCK, M_WAITOK); 6110 if (flags & (NFSLCK_READ | NFSLCK_WRITE)) 6111 other_lop = malloc(sizeof (struct nfslock), M_NFSDLOCK, 6112 M_WAITOK); 6113 else 6114 other_lop = NULL; 6115 new_lop->lo_flags = flags; 6116 new_lop->lo_first = first; 6117 new_lop->lo_end = end; 6118 nfsrv_updatelock(NULL, &new_lop, &other_lop, lfp); 6119 if (new_lop != NULL) 6120 free(new_lop, M_NFSDLOCK); 6121 if (other_lop != NULL) 6122 free(other_lop, M_NFSDLOCK); 6123 6124 /* and get rid of the rollback list */ 6125 LIST_FOREACH_SAFE(rlp, &lfp->lf_rollback, rlck_list, nrlp) 6126 free(rlp, M_NFSDROLLBACK); 6127 LIST_INIT(&lfp->lf_rollback); 6128 } 6129 6130 /* 6131 * Lock the struct nfslockfile for local lock updating. 6132 */ 6133 static void 6134 nfsrv_locklf(struct nfslockfile *lfp) 6135 { 6136 int gotlock; 6137 6138 /* lf_usecount ensures *lfp won't be free'd */ 6139 lfp->lf_usecount++; 6140 do { 6141 gotlock = nfsv4_lock(&lfp->lf_locallock_lck, 1, NULL, 6142 NFSSTATEMUTEXPTR, NULL); 6143 } while (gotlock == 0); 6144 lfp->lf_usecount--; 6145 } 6146 6147 /* 6148 * Unlock the struct nfslockfile after local lock updating. 6149 */ 6150 static void 6151 nfsrv_unlocklf(struct nfslockfile *lfp) 6152 { 6153 6154 nfsv4_unlock(&lfp->lf_locallock_lck, 0); 6155 } 6156 6157 /* 6158 * Clear out all state for the NFSv4 server. 6159 * Must be called by a thread that can sleep when no nfsds are running. 6160 */ 6161 void 6162 nfsrv_throwawayallstate(NFSPROC_T *p) 6163 { 6164 struct nfsclient *clp, *nclp; 6165 struct nfslockfile *lfp, *nlfp; 6166 int i; 6167 6168 /* 6169 * For each client, clean out the state and then free the structure. 6170 */ 6171 for (i = 0; i < nfsrv_clienthashsize; i++) { 6172 LIST_FOREACH_SAFE(clp, &nfsclienthash[i], lc_hash, nclp) { 6173 nfsrv_cleanclient(clp, p); 6174 nfsrv_freedeleglist(&clp->lc_deleg); 6175 nfsrv_freedeleglist(&clp->lc_olddeleg); 6176 free(clp->lc_stateid, M_NFSDCLIENT); 6177 free(clp, M_NFSDCLIENT); 6178 } 6179 } 6180 6181 /* 6182 * Also, free up any remaining lock file structures. 6183 */ 6184 for (i = 0; i < nfsrv_lockhashsize; i++) { 6185 LIST_FOREACH_SAFE(lfp, &nfslockhash[i], lf_hash, nlfp) { 6186 printf("nfsd unload: fnd a lock file struct\n"); 6187 nfsrv_freenfslockfile(lfp); 6188 } 6189 } 6190 6191 /* And get rid of the deviceid structures and layouts. */ 6192 nfsrv_freealllayoutsanddevids(); 6193 } 6194 6195 /* 6196 * Check the sequence# for the session and slot provided as an argument. 6197 * Also, renew the lease if the session will return NFS_OK. 6198 */ 6199 int 6200 nfsrv_checksequence(struct nfsrv_descript *nd, uint32_t sequenceid, 6201 uint32_t *highest_slotidp, uint32_t *target_highest_slotidp, int cache_this, 6202 uint32_t *sflagsp, NFSPROC_T *p) 6203 { 6204 struct nfsdsession *sep; 6205 struct nfssessionhash *shp; 6206 int error; 6207 SVCXPRT *savxprt; 6208 6209 shp = NFSSESSIONHASH(nd->nd_sessionid); 6210 NFSLOCKSESSION(shp); 6211 sep = nfsrv_findsession(nd->nd_sessionid); 6212 if (sep == NULL) { 6213 NFSUNLOCKSESSION(shp); 6214 return (NFSERR_BADSESSION); 6215 } 6216 error = nfsv4_seqsession(sequenceid, nd->nd_slotid, *highest_slotidp, 6217 sep->sess_slots, NULL, NFSV4_SLOTS - 1); 6218 if (error != 0) { 6219 NFSUNLOCKSESSION(shp); 6220 return (error); 6221 } 6222 if (cache_this != 0) 6223 nd->nd_flag |= ND_SAVEREPLY; 6224 /* Renew the lease. */ 6225 sep->sess_clp->lc_expiry = nfsrv_leaseexpiry(); 6226 nd->nd_clientid.qval = sep->sess_clp->lc_clientid.qval; 6227 nd->nd_flag |= ND_IMPLIEDCLID; 6228 6229 /* Save maximum request and reply sizes. */ 6230 nd->nd_maxreq = sep->sess_maxreq; 6231 nd->nd_maxresp = sep->sess_maxresp; 6232 6233 /* 6234 * If this session handles the backchannel, save the nd_xprt for this 6235 * RPC, since this is the one being used. 6236 * RFC-5661 specifies that the fore channel will be implicitly 6237 * bound by a Sequence operation. However, since some NFSv4.1 clients 6238 * erroneously assumed that the back channel would be implicitly 6239 * bound as well, do the implicit binding unless a 6240 * BindConnectiontoSession has already been done on the session. 6241 */ 6242 savxprt = NULL; 6243 if (sep->sess_clp->lc_req.nr_client != NULL && 6244 sep->sess_cbsess.nfsess_xprt != nd->nd_xprt && 6245 (sep->sess_crflags & NFSV4CRSESS_CONNBACKCHAN) != 0 && 6246 (sep->sess_clp->lc_flags & LCL_DONEBINDCONN) == 0) { 6247 NFSD_DEBUG(2, 6248 "nfsrv_checksequence: implicit back channel bind\n"); 6249 savxprt = sep->sess_cbsess.nfsess_xprt; 6250 SVC_ACQUIRE(nd->nd_xprt); 6251 nd->nd_xprt->xp_p2 = 6252 sep->sess_clp->lc_req.nr_client->cl_private; 6253 nd->nd_xprt->xp_idletimeout = 0; /* Disable timeout. */ 6254 sep->sess_cbsess.nfsess_xprt = nd->nd_xprt; 6255 } 6256 6257 *sflagsp = 0; 6258 if (sep->sess_clp->lc_req.nr_client == NULL) 6259 *sflagsp |= NFSV4SEQ_CBPATHDOWN; 6260 NFSUNLOCKSESSION(shp); 6261 if (savxprt != NULL) 6262 SVC_RELEASE(savxprt); 6263 if (error == NFSERR_EXPIRED) { 6264 *sflagsp |= NFSV4SEQ_EXPIREDALLSTATEREVOKED; 6265 error = 0; 6266 } else if (error == NFSERR_ADMINREVOKED) { 6267 *sflagsp |= NFSV4SEQ_ADMINSTATEREVOKED; 6268 error = 0; 6269 } 6270 *highest_slotidp = *target_highest_slotidp = NFSV4_SLOTS - 1; 6271 return (0); 6272 } 6273 6274 /* 6275 * Check/set reclaim complete for this session/clientid. 6276 */ 6277 int 6278 nfsrv_checkreclaimcomplete(struct nfsrv_descript *nd, int onefs) 6279 { 6280 struct nfsdsession *sep; 6281 struct nfssessionhash *shp; 6282 int error = 0; 6283 6284 shp = NFSSESSIONHASH(nd->nd_sessionid); 6285 NFSLOCKSTATE(); 6286 NFSLOCKSESSION(shp); 6287 sep = nfsrv_findsession(nd->nd_sessionid); 6288 if (sep == NULL) { 6289 NFSUNLOCKSESSION(shp); 6290 NFSUNLOCKSTATE(); 6291 return (NFSERR_BADSESSION); 6292 } 6293 6294 if (onefs != 0) 6295 sep->sess_clp->lc_flags |= LCL_RECLAIMONEFS; 6296 /* Check to see if reclaim complete has already happened. */ 6297 else if ((sep->sess_clp->lc_flags & LCL_RECLAIMCOMPLETE) != 0) 6298 error = NFSERR_COMPLETEALREADY; 6299 else { 6300 sep->sess_clp->lc_flags |= LCL_RECLAIMCOMPLETE; 6301 nfsrv_markreclaim(sep->sess_clp); 6302 } 6303 NFSUNLOCKSESSION(shp); 6304 NFSUNLOCKSTATE(); 6305 return (error); 6306 } 6307 6308 /* 6309 * Cache the reply in a session slot. 6310 */ 6311 void 6312 nfsrv_cache_session(struct nfsrv_descript *nd, struct mbuf **m) 6313 { 6314 struct nfsdsession *sep; 6315 struct nfssessionhash *shp; 6316 char *buf, *cp; 6317 #ifdef INET 6318 struct sockaddr_in *sin; 6319 #endif 6320 #ifdef INET6 6321 struct sockaddr_in6 *sin6; 6322 #endif 6323 6324 shp = NFSSESSIONHASH(nd->nd_sessionid); 6325 NFSLOCKSESSION(shp); 6326 sep = nfsrv_findsession(nd->nd_sessionid); 6327 if (sep == NULL) { 6328 NFSUNLOCKSESSION(shp); 6329 if ((nfsrv_stablefirst.nsf_flags & NFSNSF_GRACEOVER) != 0) { 6330 buf = malloc(INET6_ADDRSTRLEN, M_TEMP, M_WAITOK); 6331 switch (nd->nd_nam->sa_family) { 6332 #ifdef INET 6333 case AF_INET: 6334 sin = (struct sockaddr_in *)nd->nd_nam; 6335 cp = inet_ntop(sin->sin_family, 6336 &sin->sin_addr.s_addr, buf, 6337 INET6_ADDRSTRLEN); 6338 break; 6339 #endif 6340 #ifdef INET6 6341 case AF_INET6: 6342 sin6 = (struct sockaddr_in6 *)nd->nd_nam; 6343 cp = inet_ntop(sin6->sin6_family, 6344 &sin6->sin6_addr, buf, INET6_ADDRSTRLEN); 6345 break; 6346 #endif 6347 default: 6348 cp = NULL; 6349 } 6350 if (cp != NULL) 6351 printf("nfsrv_cache_session: no session " 6352 "IPaddr=%s\n", cp); 6353 else 6354 printf("nfsrv_cache_session: no session\n"); 6355 free(buf, M_TEMP); 6356 } 6357 m_freem(*m); 6358 return; 6359 } 6360 nfsv4_seqsess_cacherep(nd->nd_slotid, sep->sess_slots, nd->nd_repstat, 6361 m); 6362 NFSUNLOCKSESSION(shp); 6363 } 6364 6365 /* 6366 * Search for a session that matches the sessionid. 6367 */ 6368 static struct nfsdsession * 6369 nfsrv_findsession(uint8_t *sessionid) 6370 { 6371 struct nfsdsession *sep; 6372 struct nfssessionhash *shp; 6373 6374 shp = NFSSESSIONHASH(sessionid); 6375 LIST_FOREACH(sep, &shp->list, sess_hash) { 6376 if (!NFSBCMP(sessionid, sep->sess_sessionid, NFSX_V4SESSIONID)) 6377 break; 6378 } 6379 return (sep); 6380 } 6381 6382 /* 6383 * Destroy a session. 6384 */ 6385 int 6386 nfsrv_destroysession(struct nfsrv_descript *nd, uint8_t *sessionid) 6387 { 6388 int error, igotlock, samesess; 6389 6390 samesess = 0; 6391 if (!NFSBCMP(sessionid, nd->nd_sessionid, NFSX_V4SESSIONID) && 6392 (nd->nd_flag & ND_HASSEQUENCE) != 0) { 6393 samesess = 1; 6394 if ((nd->nd_flag & ND_LASTOP) == 0) 6395 return (NFSERR_BADSESSION); 6396 } 6397 6398 /* Lock out other nfsd threads */ 6399 NFSLOCKV4ROOTMUTEX(); 6400 nfsv4_relref(&nfsv4rootfs_lock); 6401 do { 6402 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 6403 NFSV4ROOTLOCKMUTEXPTR, NULL); 6404 } while (igotlock == 0); 6405 NFSUNLOCKV4ROOTMUTEX(); 6406 6407 error = nfsrv_freesession(NULL, sessionid); 6408 if (error == 0 && samesess != 0) 6409 nd->nd_flag &= ~ND_HASSEQUENCE; 6410 6411 NFSLOCKV4ROOTMUTEX(); 6412 nfsv4_unlock(&nfsv4rootfs_lock, 1); 6413 NFSUNLOCKV4ROOTMUTEX(); 6414 return (error); 6415 } 6416 6417 /* 6418 * Bind a connection to a session. 6419 * For now, only certain variants are supported, since the current session 6420 * structure can only handle a single backchannel entry, which will be 6421 * applied to all connections if it is set. 6422 */ 6423 int 6424 nfsrv_bindconnsess(struct nfsrv_descript *nd, uint8_t *sessionid, int *foreaftp) 6425 { 6426 struct nfssessionhash *shp; 6427 struct nfsdsession *sep; 6428 struct nfsclient *clp; 6429 SVCXPRT *savxprt; 6430 int error; 6431 6432 error = 0; 6433 savxprt = NULL; 6434 shp = NFSSESSIONHASH(sessionid); 6435 NFSLOCKSTATE(); 6436 NFSLOCKSESSION(shp); 6437 sep = nfsrv_findsession(sessionid); 6438 if (sep != NULL) { 6439 clp = sep->sess_clp; 6440 if (*foreaftp == NFSCDFC4_BACK || 6441 *foreaftp == NFSCDFC4_BACK_OR_BOTH || 6442 *foreaftp == NFSCDFC4_FORE_OR_BOTH) { 6443 /* Try to set up a backchannel. */ 6444 if (clp->lc_req.nr_client == NULL) { 6445 NFSD_DEBUG(2, "nfsrv_bindconnsess: acquire " 6446 "backchannel\n"); 6447 clp->lc_req.nr_client = (struct __rpc_client *) 6448 clnt_bck_create(nd->nd_xprt->xp_socket, 6449 sep->sess_cbprogram, NFSV4_CBVERS); 6450 } 6451 if (clp->lc_req.nr_client != NULL) { 6452 NFSD_DEBUG(2, "nfsrv_bindconnsess: set up " 6453 "backchannel\n"); 6454 savxprt = sep->sess_cbsess.nfsess_xprt; 6455 SVC_ACQUIRE(nd->nd_xprt); 6456 nd->nd_xprt->xp_p2 = 6457 clp->lc_req.nr_client->cl_private; 6458 /* Disable idle timeout. */ 6459 nd->nd_xprt->xp_idletimeout = 0; 6460 sep->sess_cbsess.nfsess_xprt = nd->nd_xprt; 6461 sep->sess_crflags |= NFSV4CRSESS_CONNBACKCHAN; 6462 clp->lc_flags |= LCL_DONEBINDCONN; 6463 if (*foreaftp == NFSCDFS4_BACK) 6464 *foreaftp = NFSCDFS4_BACK; 6465 else 6466 *foreaftp = NFSCDFS4_BOTH; 6467 } else if (*foreaftp != NFSCDFC4_BACK) { 6468 NFSD_DEBUG(2, "nfsrv_bindconnsess: can't set " 6469 "up backchannel\n"); 6470 sep->sess_crflags &= ~NFSV4CRSESS_CONNBACKCHAN; 6471 clp->lc_flags |= LCL_DONEBINDCONN; 6472 *foreaftp = NFSCDFS4_FORE; 6473 } else { 6474 error = NFSERR_NOTSUPP; 6475 printf("nfsrv_bindconnsess: Can't add " 6476 "backchannel\n"); 6477 } 6478 } else { 6479 NFSD_DEBUG(2, "nfsrv_bindconnsess: Set forechannel\n"); 6480 clp->lc_flags |= LCL_DONEBINDCONN; 6481 *foreaftp = NFSCDFS4_FORE; 6482 } 6483 } else 6484 error = NFSERR_BADSESSION; 6485 NFSUNLOCKSESSION(shp); 6486 NFSUNLOCKSTATE(); 6487 if (savxprt != NULL) 6488 SVC_RELEASE(savxprt); 6489 return (error); 6490 } 6491 6492 /* 6493 * Free up a session structure. 6494 */ 6495 static int 6496 nfsrv_freesession(struct nfsdsession *sep, uint8_t *sessionid) 6497 { 6498 struct nfssessionhash *shp; 6499 int i; 6500 6501 NFSLOCKSTATE(); 6502 if (sep == NULL) { 6503 shp = NFSSESSIONHASH(sessionid); 6504 NFSLOCKSESSION(shp); 6505 sep = nfsrv_findsession(sessionid); 6506 } else { 6507 shp = NFSSESSIONHASH(sep->sess_sessionid); 6508 NFSLOCKSESSION(shp); 6509 } 6510 if (sep != NULL) { 6511 sep->sess_refcnt--; 6512 if (sep->sess_refcnt > 0) { 6513 NFSUNLOCKSESSION(shp); 6514 NFSUNLOCKSTATE(); 6515 return (NFSERR_BACKCHANBUSY); 6516 } 6517 LIST_REMOVE(sep, sess_hash); 6518 LIST_REMOVE(sep, sess_list); 6519 } 6520 NFSUNLOCKSESSION(shp); 6521 NFSUNLOCKSTATE(); 6522 if (sep == NULL) 6523 return (NFSERR_BADSESSION); 6524 for (i = 0; i < NFSV4_SLOTS; i++) 6525 if (sep->sess_slots[i].nfssl_reply != NULL) 6526 m_freem(sep->sess_slots[i].nfssl_reply); 6527 if (sep->sess_cbsess.nfsess_xprt != NULL) 6528 SVC_RELEASE(sep->sess_cbsess.nfsess_xprt); 6529 free(sep, M_NFSDSESSION); 6530 return (0); 6531 } 6532 6533 /* 6534 * Free a stateid. 6535 * RFC5661 says that it should fail when there are associated opens, locks 6536 * or delegations. Since stateids represent opens, I don't see how you can 6537 * free an open stateid (it will be free'd when closed), so this function 6538 * only works for lock stateids (freeing the lock_owner) or delegations. 6539 */ 6540 int 6541 nfsrv_freestateid(struct nfsrv_descript *nd, nfsv4stateid_t *stateidp, 6542 NFSPROC_T *p) 6543 { 6544 struct nfsclient *clp; 6545 struct nfsstate *stp; 6546 int error; 6547 6548 NFSLOCKSTATE(); 6549 /* 6550 * Look up the stateid 6551 */ 6552 error = nfsrv_getclient((nfsquad_t)((u_quad_t)0), CLOPS_RENEW, &clp, 6553 NULL, (nfsquad_t)((u_quad_t)0), 0, nd, p); 6554 if (error == 0) { 6555 /* First, check for a delegation. */ 6556 LIST_FOREACH(stp, &clp->lc_deleg, ls_list) { 6557 if (!NFSBCMP(stp->ls_stateid.other, stateidp->other, 6558 NFSX_STATEIDOTHER)) 6559 break; 6560 } 6561 if (stp != NULL) { 6562 nfsrv_freedeleg(stp); 6563 NFSUNLOCKSTATE(); 6564 return (error); 6565 } 6566 } 6567 /* Not a delegation, try for a lock_owner. */ 6568 if (error == 0) 6569 error = nfsrv_getstate(clp, stateidp, 0, &stp); 6570 if (error == 0 && ((stp->ls_flags & (NFSLCK_OPEN | NFSLCK_DELEGREAD | 6571 NFSLCK_DELEGWRITE)) != 0 || (stp->ls_flags & NFSLCK_LOCK) == 0)) 6572 /* Not a lock_owner stateid. */ 6573 error = NFSERR_LOCKSHELD; 6574 if (error == 0 && !LIST_EMPTY(&stp->ls_lock)) 6575 error = NFSERR_LOCKSHELD; 6576 if (error == 0) 6577 nfsrv_freelockowner(stp, NULL, 0, p); 6578 NFSUNLOCKSTATE(); 6579 return (error); 6580 } 6581 6582 /* 6583 * Test a stateid. 6584 */ 6585 int 6586 nfsrv_teststateid(struct nfsrv_descript *nd, nfsv4stateid_t *stateidp, 6587 NFSPROC_T *p) 6588 { 6589 struct nfsclient *clp; 6590 struct nfsstate *stp; 6591 int error; 6592 6593 NFSLOCKSTATE(); 6594 /* 6595 * Look up the stateid 6596 */ 6597 error = nfsrv_getclient((nfsquad_t)((u_quad_t)0), CLOPS_RENEW, &clp, 6598 NULL, (nfsquad_t)((u_quad_t)0), 0, nd, p); 6599 if (error == 0) 6600 error = nfsrv_getstate(clp, stateidp, 0, &stp); 6601 if (error == 0 && stateidp->seqid != 0 && 6602 SEQ_LT(stateidp->seqid, stp->ls_stateid.seqid)) 6603 error = NFSERR_OLDSTATEID; 6604 NFSUNLOCKSTATE(); 6605 return (error); 6606 } 6607 6608 /* 6609 * Generate the xdr for an NFSv4.1 CBSequence Operation. 6610 */ 6611 static int 6612 nfsv4_setcbsequence(struct nfsrv_descript *nd, struct nfsclient *clp, 6613 int dont_replycache, struct nfsdsession **sepp) 6614 { 6615 struct nfsdsession *sep; 6616 uint32_t *tl, slotseq = 0; 6617 int maxslot, slotpos; 6618 uint8_t sessionid[NFSX_V4SESSIONID]; 6619 int error; 6620 6621 error = nfsv4_getcbsession(clp, sepp); 6622 if (error != 0) 6623 return (error); 6624 sep = *sepp; 6625 (void)nfsv4_sequencelookup(NULL, &sep->sess_cbsess, &slotpos, &maxslot, 6626 &slotseq, sessionid); 6627 KASSERT(maxslot >= 0, ("nfsv4_setcbsequence neg maxslot")); 6628 6629 /* Build the Sequence arguments. */ 6630 NFSM_BUILD(tl, uint32_t *, NFSX_V4SESSIONID + 5 * NFSX_UNSIGNED); 6631 bcopy(sessionid, tl, NFSX_V4SESSIONID); 6632 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED; 6633 nd->nd_slotseq = tl; 6634 *tl++ = txdr_unsigned(slotseq); 6635 *tl++ = txdr_unsigned(slotpos); 6636 *tl++ = txdr_unsigned(maxslot); 6637 if (dont_replycache == 0) 6638 *tl++ = newnfs_true; 6639 else 6640 *tl++ = newnfs_false; 6641 *tl = 0; /* No referring call list, for now. */ 6642 nd->nd_flag |= ND_HASSEQUENCE; 6643 return (0); 6644 } 6645 6646 /* 6647 * Get a session for the callback. 6648 */ 6649 static int 6650 nfsv4_getcbsession(struct nfsclient *clp, struct nfsdsession **sepp) 6651 { 6652 struct nfsdsession *sep; 6653 6654 NFSLOCKSTATE(); 6655 LIST_FOREACH(sep, &clp->lc_session, sess_list) { 6656 if ((sep->sess_crflags & NFSV4CRSESS_CONNBACKCHAN) != 0) 6657 break; 6658 } 6659 if (sep == NULL) { 6660 NFSUNLOCKSTATE(); 6661 return (NFSERR_BADSESSION); 6662 } 6663 sep->sess_refcnt++; 6664 *sepp = sep; 6665 NFSUNLOCKSTATE(); 6666 return (0); 6667 } 6668 6669 /* 6670 * Free up all backchannel xprts. This needs to be done when the nfsd threads 6671 * exit, since those transports will all be going away. 6672 * This is only called after all the nfsd threads are done performing RPCs, 6673 * so locking shouldn't be an issue. 6674 */ 6675 void 6676 nfsrv_freeallbackchannel_xprts(void) 6677 { 6678 struct nfsdsession *sep; 6679 struct nfsclient *clp; 6680 SVCXPRT *xprt; 6681 int i; 6682 6683 for (i = 0; i < nfsrv_clienthashsize; i++) { 6684 LIST_FOREACH(clp, &nfsclienthash[i], lc_hash) { 6685 LIST_FOREACH(sep, &clp->lc_session, sess_list) { 6686 xprt = sep->sess_cbsess.nfsess_xprt; 6687 sep->sess_cbsess.nfsess_xprt = NULL; 6688 if (xprt != NULL) 6689 SVC_RELEASE(xprt); 6690 } 6691 } 6692 } 6693 } 6694 6695 /* 6696 * Do a layout commit. Actually just call nfsrv_updatemdsattr(). 6697 * I have no idea if the rest of these arguments will ever be useful? 6698 */ 6699 int 6700 nfsrv_layoutcommit(struct nfsrv_descript *nd, vnode_t vp, int layouttype, 6701 int hasnewoff, uint64_t newoff, uint64_t offset, uint64_t len, 6702 int hasnewmtime, struct timespec *newmtimep, int reclaim, 6703 nfsv4stateid_t *stateidp, int maxcnt, char *layp, int *hasnewsizep, 6704 uint64_t *newsizep, struct ucred *cred, NFSPROC_T *p) 6705 { 6706 struct nfsvattr na; 6707 int error; 6708 6709 error = nfsrv_updatemdsattr(vp, &na, p); 6710 if (error == 0) { 6711 *hasnewsizep = 1; 6712 *newsizep = na.na_size; 6713 } 6714 return (error); 6715 } 6716 6717 /* 6718 * Try and get a layout. 6719 */ 6720 int 6721 nfsrv_layoutget(struct nfsrv_descript *nd, vnode_t vp, struct nfsexstuff *exp, 6722 int layouttype, int *iomode, uint64_t *offset, uint64_t *len, 6723 uint64_t minlen, nfsv4stateid_t *stateidp, int maxcnt, int *retonclose, 6724 int *layoutlenp, char *layp, struct ucred *cred, NFSPROC_T *p) 6725 { 6726 struct nfslayouthash *lhyp; 6727 struct nfslayout *lyp; 6728 char *devid; 6729 fhandle_t fh, *dsfhp; 6730 int error, mirrorcnt; 6731 6732 if (nfsrv_devidcnt == 0) 6733 return (NFSERR_UNKNLAYOUTTYPE); 6734 6735 if (*offset != 0) 6736 printf("nfsrv_layoutget: off=%ju len=%ju\n", (uintmax_t)*offset, 6737 (uintmax_t)*len); 6738 error = nfsvno_getfh(vp, &fh, p); 6739 NFSD_DEBUG(4, "layoutget getfh=%d\n", error); 6740 if (error != 0) 6741 return (error); 6742 6743 /* 6744 * For now, all layouts are for entire files. 6745 * Only issue Read/Write layouts if requested for a non-readonly fs. 6746 */ 6747 if (NFSVNO_EXRDONLY(exp)) { 6748 if (*iomode == NFSLAYOUTIOMODE_RW) 6749 return (NFSERR_LAYOUTTRYLATER); 6750 *iomode = NFSLAYOUTIOMODE_READ; 6751 } 6752 if (*iomode != NFSLAYOUTIOMODE_RW) 6753 *iomode = NFSLAYOUTIOMODE_READ; 6754 6755 /* 6756 * Check to see if a write layout can be issued for this file. 6757 * This is used during mirror recovery to avoid RW layouts being 6758 * issued for a file while it is being copied to the recovered 6759 * mirror. 6760 */ 6761 if (*iomode == NFSLAYOUTIOMODE_RW && nfsrv_dontlayout(&fh) != 0) 6762 return (NFSERR_LAYOUTTRYLATER); 6763 6764 *retonclose = 0; 6765 *offset = 0; 6766 *len = UINT64_MAX; 6767 6768 /* First, see if a layout already exists and return if found. */ 6769 lhyp = NFSLAYOUTHASH(&fh); 6770 NFSLOCKLAYOUT(lhyp); 6771 error = nfsrv_findlayout(&nd->nd_clientid, &fh, layouttype, p, &lyp); 6772 NFSD_DEBUG(4, "layoutget findlay=%d\n", error); 6773 /* 6774 * Not sure if the seqid must be the same, so I won't check it. 6775 */ 6776 if (error == 0 && (stateidp->other[0] != lyp->lay_stateid.other[0] || 6777 stateidp->other[1] != lyp->lay_stateid.other[1] || 6778 stateidp->other[2] != lyp->lay_stateid.other[2])) { 6779 if ((lyp->lay_flags & NFSLAY_CALLB) == 0) { 6780 NFSUNLOCKLAYOUT(lhyp); 6781 NFSD_DEBUG(1, "ret bad stateid\n"); 6782 return (NFSERR_BADSTATEID); 6783 } 6784 /* 6785 * I believe we get here because there is a race between 6786 * the client processing the CBLAYOUTRECALL and the layout 6787 * being deleted here on the server. 6788 * The client has now done a LayoutGet with a non-layout 6789 * stateid, as it would when there is no layout. 6790 * As such, free this layout and set error == NFSERR_BADSTATEID 6791 * so the code below will create a new layout structure as 6792 * would happen if no layout was found. 6793 * "lyp" will be set before being used below, but set it NULL 6794 * as a safety belt. 6795 */ 6796 nfsrv_freelayout(&lhyp->list, lyp); 6797 lyp = NULL; 6798 error = NFSERR_BADSTATEID; 6799 } 6800 if (error == 0) { 6801 if (lyp->lay_layoutlen > maxcnt) { 6802 NFSUNLOCKLAYOUT(lhyp); 6803 NFSD_DEBUG(1, "ret layout too small\n"); 6804 return (NFSERR_TOOSMALL); 6805 } 6806 if (*iomode == NFSLAYOUTIOMODE_RW) 6807 lyp->lay_flags |= NFSLAY_RW; 6808 else 6809 lyp->lay_flags |= NFSLAY_READ; 6810 NFSBCOPY(lyp->lay_xdr, layp, lyp->lay_layoutlen); 6811 *layoutlenp = lyp->lay_layoutlen; 6812 if (++lyp->lay_stateid.seqid == 0) 6813 lyp->lay_stateid.seqid = 1; 6814 stateidp->seqid = lyp->lay_stateid.seqid; 6815 NFSUNLOCKLAYOUT(lhyp); 6816 NFSD_DEBUG(4, "ret fnd layout\n"); 6817 return (0); 6818 } 6819 NFSUNLOCKLAYOUT(lhyp); 6820 6821 /* Find the device id and file handle. */ 6822 dsfhp = malloc(sizeof(fhandle_t) * NFSDEV_MAXMIRRORS, M_TEMP, M_WAITOK); 6823 devid = malloc(NFSX_V4DEVICEID * NFSDEV_MAXMIRRORS, M_TEMP, M_WAITOK); 6824 error = nfsrv_dsgetdevandfh(vp, p, &mirrorcnt, dsfhp, devid); 6825 NFSD_DEBUG(4, "layoutget devandfh=%d\n", error); 6826 if (error == 0) { 6827 if (layouttype == NFSLAYOUT_NFSV4_1_FILES) { 6828 if (NFSX_V4FILELAYOUT > maxcnt) 6829 error = NFSERR_TOOSMALL; 6830 else 6831 lyp = nfsrv_filelayout(nd, *iomode, &fh, dsfhp, 6832 devid, vp->v_mount->mnt_stat.f_fsid); 6833 } else { 6834 if (NFSX_V4FLEXLAYOUT(mirrorcnt) > maxcnt) 6835 error = NFSERR_TOOSMALL; 6836 else 6837 lyp = nfsrv_flexlayout(nd, *iomode, mirrorcnt, 6838 &fh, dsfhp, devid, 6839 vp->v_mount->mnt_stat.f_fsid); 6840 } 6841 } 6842 free(dsfhp, M_TEMP); 6843 free(devid, M_TEMP); 6844 if (error != 0) 6845 return (error); 6846 6847 /* 6848 * Now, add this layout to the list. 6849 */ 6850 error = nfsrv_addlayout(nd, &lyp, stateidp, layp, layoutlenp, p); 6851 NFSD_DEBUG(4, "layoutget addl=%d\n", error); 6852 /* 6853 * The lyp will be set to NULL by nfsrv_addlayout() if it 6854 * linked the new structure into the lists. 6855 */ 6856 free(lyp, M_NFSDSTATE); 6857 return (error); 6858 } 6859 6860 /* 6861 * Generate a File Layout. 6862 */ 6863 static struct nfslayout * 6864 nfsrv_filelayout(struct nfsrv_descript *nd, int iomode, fhandle_t *fhp, 6865 fhandle_t *dsfhp, char *devid, fsid_t fs) 6866 { 6867 uint32_t *tl; 6868 struct nfslayout *lyp; 6869 uint64_t pattern_offset; 6870 6871 lyp = malloc(sizeof(struct nfslayout) + NFSX_V4FILELAYOUT, M_NFSDSTATE, 6872 M_WAITOK | M_ZERO); 6873 lyp->lay_type = NFSLAYOUT_NFSV4_1_FILES; 6874 if (iomode == NFSLAYOUTIOMODE_RW) 6875 lyp->lay_flags = NFSLAY_RW; 6876 else 6877 lyp->lay_flags = NFSLAY_READ; 6878 NFSBCOPY(fhp, &lyp->lay_fh, sizeof(*fhp)); 6879 lyp->lay_clientid.qval = nd->nd_clientid.qval; 6880 lyp->lay_fsid = fs; 6881 6882 /* Fill in the xdr for the files layout. */ 6883 tl = (uint32_t *)lyp->lay_xdr; 6884 NFSBCOPY(devid, tl, NFSX_V4DEVICEID); /* Device ID. */ 6885 tl += (NFSX_V4DEVICEID / NFSX_UNSIGNED); 6886 6887 /* 6888 * Make the stripe size as many 64K blocks as will fit in the stripe 6889 * mask. Since there is only one stripe, the stripe size doesn't really 6890 * matter, except that the Linux client will only handle an exact 6891 * multiple of their PAGE_SIZE (usually 4K). I chose 64K as a value 6892 * that should cover most/all arches w.r.t. PAGE_SIZE. 6893 */ 6894 *tl++ = txdr_unsigned(NFSFLAYUTIL_STRIPE_MASK & ~0xffff); 6895 *tl++ = 0; /* 1st stripe index. */ 6896 pattern_offset = 0; 6897 txdr_hyper(pattern_offset, tl); tl += 2; /* Pattern offset. */ 6898 *tl++ = txdr_unsigned(1); /* 1 file handle. */ 6899 *tl++ = txdr_unsigned(NFSX_V4PNFSFH); 6900 NFSBCOPY(dsfhp, tl, sizeof(*dsfhp)); 6901 lyp->lay_layoutlen = NFSX_V4FILELAYOUT; 6902 return (lyp); 6903 } 6904 6905 #define FLEX_OWNERID "999" 6906 #define FLEX_UID0 "0" 6907 /* 6908 * Generate a Flex File Layout. 6909 * The FLEX_OWNERID can be any string of 3 decimal digits. Although this 6910 * string goes on the wire, it isn't supposed to be used by the client, 6911 * since this server uses tight coupling. 6912 * Although not recommended by the spec., if vfs.nfsd.flexlinuxhack=1 use 6913 * a string of "0". This works around the Linux Flex File Layout driver bug 6914 * which uses the synthetic uid/gid strings for the "tightly coupled" case. 6915 */ 6916 static struct nfslayout * 6917 nfsrv_flexlayout(struct nfsrv_descript *nd, int iomode, int mirrorcnt, 6918 fhandle_t *fhp, fhandle_t *dsfhp, char *devid, fsid_t fs) 6919 { 6920 uint32_t *tl; 6921 struct nfslayout *lyp; 6922 uint64_t lenval; 6923 int i; 6924 6925 lyp = malloc(sizeof(struct nfslayout) + NFSX_V4FLEXLAYOUT(mirrorcnt), 6926 M_NFSDSTATE, M_WAITOK | M_ZERO); 6927 lyp->lay_type = NFSLAYOUT_FLEXFILE; 6928 if (iomode == NFSLAYOUTIOMODE_RW) 6929 lyp->lay_flags = NFSLAY_RW; 6930 else 6931 lyp->lay_flags = NFSLAY_READ; 6932 NFSBCOPY(fhp, &lyp->lay_fh, sizeof(*fhp)); 6933 lyp->lay_clientid.qval = nd->nd_clientid.qval; 6934 lyp->lay_fsid = fs; 6935 lyp->lay_mirrorcnt = mirrorcnt; 6936 6937 /* Fill in the xdr for the files layout. */ 6938 tl = (uint32_t *)lyp->lay_xdr; 6939 lenval = 0; 6940 txdr_hyper(lenval, tl); tl += 2; /* Stripe unit. */ 6941 *tl++ = txdr_unsigned(mirrorcnt); /* # of mirrors. */ 6942 for (i = 0; i < mirrorcnt; i++) { 6943 *tl++ = txdr_unsigned(1); /* One stripe. */ 6944 NFSBCOPY(devid, tl, NFSX_V4DEVICEID); /* Device ID. */ 6945 tl += (NFSX_V4DEVICEID / NFSX_UNSIGNED); 6946 devid += NFSX_V4DEVICEID; 6947 *tl++ = txdr_unsigned(1); /* Efficiency. */ 6948 *tl++ = 0; /* Proxy Stateid. */ 6949 *tl++ = 0x55555555; 6950 *tl++ = 0x55555555; 6951 *tl++ = 0x55555555; 6952 *tl++ = txdr_unsigned(1); /* 1 file handle. */ 6953 *tl++ = txdr_unsigned(NFSX_V4PNFSFH); 6954 NFSBCOPY(dsfhp, tl, sizeof(*dsfhp)); 6955 tl += (NFSM_RNDUP(NFSX_V4PNFSFH) / NFSX_UNSIGNED); 6956 dsfhp++; 6957 if (nfsrv_flexlinuxhack != 0) { 6958 *tl++ = txdr_unsigned(strlen(FLEX_UID0)); 6959 *tl = 0; /* 0 pad string. */ 6960 NFSBCOPY(FLEX_UID0, tl++, strlen(FLEX_UID0)); 6961 *tl++ = txdr_unsigned(strlen(FLEX_UID0)); 6962 *tl = 0; /* 0 pad string. */ 6963 NFSBCOPY(FLEX_UID0, tl++, strlen(FLEX_UID0)); 6964 } else { 6965 *tl++ = txdr_unsigned(strlen(FLEX_OWNERID)); 6966 NFSBCOPY(FLEX_OWNERID, tl++, NFSX_UNSIGNED); 6967 *tl++ = txdr_unsigned(strlen(FLEX_OWNERID)); 6968 NFSBCOPY(FLEX_OWNERID, tl++, NFSX_UNSIGNED); 6969 } 6970 } 6971 *tl++ = txdr_unsigned(0); /* ff_flags. */ 6972 *tl = txdr_unsigned(60); /* Status interval hint. */ 6973 lyp->lay_layoutlen = NFSX_V4FLEXLAYOUT(mirrorcnt); 6974 return (lyp); 6975 } 6976 6977 /* 6978 * Parse and process Flex File errors returned via LayoutReturn. 6979 */ 6980 static void 6981 nfsrv_flexlayouterr(struct nfsrv_descript *nd, uint32_t *layp, int maxcnt, 6982 NFSPROC_T *p) 6983 { 6984 uint32_t *tl; 6985 int cnt, errcnt, i, j, opnum, stat; 6986 char devid[NFSX_V4DEVICEID]; 6987 6988 tl = layp; 6989 cnt = fxdr_unsigned(int, *tl++); 6990 NFSD_DEBUG(4, "flexlayouterr cnt=%d\n", cnt); 6991 for (i = 0; i < cnt; i++) { 6992 /* Skip offset, length and stateid for now. */ 6993 tl += (4 + NFSX_STATEID / NFSX_UNSIGNED); 6994 errcnt = fxdr_unsigned(int, *tl++); 6995 NFSD_DEBUG(4, "flexlayouterr errcnt=%d\n", errcnt); 6996 for (j = 0; j < errcnt; j++) { 6997 NFSBCOPY(tl, devid, NFSX_V4DEVICEID); 6998 tl += (NFSX_V4DEVICEID / NFSX_UNSIGNED); 6999 stat = fxdr_unsigned(int, *tl++); 7000 opnum = fxdr_unsigned(int, *tl++); 7001 NFSD_DEBUG(4, "flexlayouterr op=%d stat=%d\n", opnum, 7002 stat); 7003 /* 7004 * Except for NFSERR_ACCES and NFSERR_STALE errors, 7005 * disable the mirror. 7006 */ 7007 if (stat != NFSERR_ACCES && stat != NFSERR_STALE) 7008 nfsrv_delds(devid, p); 7009 } 7010 } 7011 } 7012 7013 /* 7014 * This function removes all flex file layouts which has a mirror with 7015 * a device id that matches the argument. 7016 * Called when the DS represented by the device id has failed. 7017 */ 7018 void 7019 nfsrv_flexmirrordel(char *devid, NFSPROC_T *p) 7020 { 7021 uint32_t *tl; 7022 struct nfslayout *lyp, *nlyp; 7023 struct nfslayouthash *lhyp; 7024 struct nfslayouthead loclyp; 7025 int i, j; 7026 7027 NFSD_DEBUG(4, "flexmirrordel\n"); 7028 /* Move all layouts found onto a local list. */ 7029 TAILQ_INIT(&loclyp); 7030 for (i = 0; i < nfsrv_layouthashsize; i++) { 7031 lhyp = &nfslayouthash[i]; 7032 NFSLOCKLAYOUT(lhyp); 7033 TAILQ_FOREACH_SAFE(lyp, &lhyp->list, lay_list, nlyp) { 7034 if (lyp->lay_type == NFSLAYOUT_FLEXFILE && 7035 lyp->lay_mirrorcnt > 1) { 7036 NFSD_DEBUG(4, "possible match\n"); 7037 tl = lyp->lay_xdr; 7038 tl += 3; 7039 for (j = 0; j < lyp->lay_mirrorcnt; j++) { 7040 tl++; 7041 if (NFSBCMP(devid, tl, NFSX_V4DEVICEID) 7042 == 0) { 7043 /* Found one. */ 7044 NFSD_DEBUG(4, "fnd one\n"); 7045 TAILQ_REMOVE(&lhyp->list, lyp, 7046 lay_list); 7047 TAILQ_INSERT_HEAD(&loclyp, lyp, 7048 lay_list); 7049 break; 7050 } 7051 tl += (NFSX_V4DEVICEID / NFSX_UNSIGNED + 7052 NFSM_RNDUP(NFSX_V4PNFSFH) / 7053 NFSX_UNSIGNED + 11 * NFSX_UNSIGNED); 7054 } 7055 } 7056 } 7057 NFSUNLOCKLAYOUT(lhyp); 7058 } 7059 7060 /* Now, try to do a Layout recall for each one found. */ 7061 TAILQ_FOREACH_SAFE(lyp, &loclyp, lay_list, nlyp) { 7062 NFSD_DEBUG(4, "do layout recall\n"); 7063 /* 7064 * The layout stateid.seqid needs to be incremented 7065 * before doing a LAYOUT_RECALL callback. 7066 */ 7067 if (++lyp->lay_stateid.seqid == 0) 7068 lyp->lay_stateid.seqid = 1; 7069 nfsrv_recalllayout(lyp->lay_clientid, &lyp->lay_stateid, 7070 &lyp->lay_fh, lyp, 1, lyp->lay_type, p); 7071 nfsrv_freelayout(&loclyp, lyp); 7072 } 7073 } 7074 7075 /* 7076 * Do a recall callback to the client for this layout. 7077 */ 7078 static int 7079 nfsrv_recalllayout(nfsquad_t clid, nfsv4stateid_t *stateidp, fhandle_t *fhp, 7080 struct nfslayout *lyp, int changed, int laytype, NFSPROC_T *p) 7081 { 7082 struct nfsclient *clp; 7083 int error; 7084 7085 NFSD_DEBUG(4, "nfsrv_recalllayout\n"); 7086 error = nfsrv_getclient(clid, 0, &clp, NULL, (nfsquad_t)((u_quad_t)0), 7087 0, NULL, p); 7088 NFSD_DEBUG(4, "aft nfsrv_getclient=%d\n", error); 7089 if (error != 0) { 7090 printf("nfsrv_recalllayout: getclient err=%d\n", error); 7091 return (error); 7092 } 7093 if ((clp->lc_flags & LCL_NFSV41) != 0) { 7094 error = nfsrv_docallback(clp, NFSV4OP_CBLAYOUTRECALL, 7095 stateidp, changed, fhp, NULL, NULL, laytype, p); 7096 /* If lyp != NULL, handle an error return here. */ 7097 if (error != 0 && lyp != NULL) { 7098 NFSDRECALLLOCK(); 7099 /* 7100 * Mark it returned, since no layout recall 7101 * has been done. 7102 * All errors seem to be non-recoverable, although 7103 * NFSERR_NOMATCHLAYOUT is a normal event. 7104 */ 7105 if ((lyp->lay_flags & NFSLAY_RECALL) != 0) { 7106 lyp->lay_flags |= NFSLAY_RETURNED; 7107 wakeup(lyp); 7108 } 7109 NFSDRECALLUNLOCK(); 7110 if (error != NFSERR_NOMATCHLAYOUT) 7111 printf("nfsrv_recalllayout: err=%d\n", error); 7112 } 7113 } else 7114 printf("nfsrv_recalllayout: clp not NFSv4.1\n"); 7115 return (error); 7116 } 7117 7118 /* 7119 * Find a layout to recall when we exceed our high water mark. 7120 */ 7121 void 7122 nfsrv_recalloldlayout(NFSPROC_T *p) 7123 { 7124 struct nfslayouthash *lhyp; 7125 struct nfslayout *lyp; 7126 nfsquad_t clientid; 7127 nfsv4stateid_t stateid; 7128 fhandle_t fh; 7129 int error, laytype = 0, ret; 7130 7131 lhyp = &nfslayouthash[arc4random() % nfsrv_layouthashsize]; 7132 NFSLOCKLAYOUT(lhyp); 7133 TAILQ_FOREACH_REVERSE(lyp, &lhyp->list, nfslayouthead, lay_list) { 7134 if ((lyp->lay_flags & NFSLAY_CALLB) == 0) { 7135 lyp->lay_flags |= NFSLAY_CALLB; 7136 /* 7137 * The layout stateid.seqid needs to be incremented 7138 * before doing a LAYOUT_RECALL callback. 7139 */ 7140 if (++lyp->lay_stateid.seqid == 0) 7141 lyp->lay_stateid.seqid = 1; 7142 clientid = lyp->lay_clientid; 7143 stateid = lyp->lay_stateid; 7144 NFSBCOPY(&lyp->lay_fh, &fh, sizeof(fh)); 7145 laytype = lyp->lay_type; 7146 break; 7147 } 7148 } 7149 NFSUNLOCKLAYOUT(lhyp); 7150 if (lyp != NULL) { 7151 error = nfsrv_recalllayout(clientid, &stateid, &fh, NULL, 0, 7152 laytype, p); 7153 if (error != 0 && error != NFSERR_NOMATCHLAYOUT) 7154 NFSD_DEBUG(4, "recallold=%d\n", error); 7155 if (error != 0) { 7156 NFSLOCKLAYOUT(lhyp); 7157 /* 7158 * Since the hash list was unlocked, we need to 7159 * find it again. 7160 */ 7161 ret = nfsrv_findlayout(&clientid, &fh, laytype, p, 7162 &lyp); 7163 if (ret == 0 && 7164 (lyp->lay_flags & NFSLAY_CALLB) != 0 && 7165 lyp->lay_stateid.other[0] == stateid.other[0] && 7166 lyp->lay_stateid.other[1] == stateid.other[1] && 7167 lyp->lay_stateid.other[2] == stateid.other[2]) { 7168 /* 7169 * The client no longer knows this layout, so 7170 * it can be free'd now. 7171 */ 7172 if (error == NFSERR_NOMATCHLAYOUT) 7173 nfsrv_freelayout(&lhyp->list, lyp); 7174 else { 7175 /* 7176 * Leave it to be tried later by 7177 * clearing NFSLAY_CALLB and moving 7178 * it to the head of the list, so it 7179 * won't be tried again for a while. 7180 */ 7181 lyp->lay_flags &= ~NFSLAY_CALLB; 7182 TAILQ_REMOVE(&lhyp->list, lyp, 7183 lay_list); 7184 TAILQ_INSERT_HEAD(&lhyp->list, lyp, 7185 lay_list); 7186 } 7187 } 7188 NFSUNLOCKLAYOUT(lhyp); 7189 } 7190 } 7191 } 7192 7193 /* 7194 * Try and return layout(s). 7195 */ 7196 int 7197 nfsrv_layoutreturn(struct nfsrv_descript *nd, vnode_t vp, 7198 int layouttype, int iomode, uint64_t offset, uint64_t len, int reclaim, 7199 int kind, nfsv4stateid_t *stateidp, int maxcnt, uint32_t *layp, int *fndp, 7200 struct ucred *cred, NFSPROC_T *p) 7201 { 7202 struct nfsvattr na; 7203 struct nfslayouthash *lhyp; 7204 struct nfslayout *lyp; 7205 fhandle_t fh; 7206 int error = 0; 7207 7208 *fndp = 0; 7209 if (kind == NFSV4LAYOUTRET_FILE) { 7210 error = nfsvno_getfh(vp, &fh, p); 7211 if (error == 0) { 7212 error = nfsrv_updatemdsattr(vp, &na, p); 7213 if (error != 0) 7214 printf("nfsrv_layoutreturn: updatemdsattr" 7215 " failed=%d\n", error); 7216 } 7217 if (error == 0) { 7218 if (reclaim == newnfs_true) { 7219 error = nfsrv_checkgrace(NULL, NULL, 7220 NFSLCK_RECLAIM); 7221 if (error != NFSERR_NOGRACE) 7222 error = 0; 7223 return (error); 7224 } 7225 lhyp = NFSLAYOUTHASH(&fh); 7226 NFSDRECALLLOCK(); 7227 NFSLOCKLAYOUT(lhyp); 7228 error = nfsrv_findlayout(&nd->nd_clientid, &fh, 7229 layouttype, p, &lyp); 7230 NFSD_DEBUG(4, "layoutret findlay=%d\n", error); 7231 if (error == 0 && 7232 stateidp->other[0] == lyp->lay_stateid.other[0] && 7233 stateidp->other[1] == lyp->lay_stateid.other[1] && 7234 stateidp->other[2] == lyp->lay_stateid.other[2]) { 7235 NFSD_DEBUG(4, "nfsrv_layoutreturn: stateid %d" 7236 " %x %x %x laystateid %d %x %x %x" 7237 " off=%ju len=%ju flgs=0x%x\n", 7238 stateidp->seqid, stateidp->other[0], 7239 stateidp->other[1], stateidp->other[2], 7240 lyp->lay_stateid.seqid, 7241 lyp->lay_stateid.other[0], 7242 lyp->lay_stateid.other[1], 7243 lyp->lay_stateid.other[2], 7244 (uintmax_t)offset, (uintmax_t)len, 7245 lyp->lay_flags); 7246 if (++lyp->lay_stateid.seqid == 0) 7247 lyp->lay_stateid.seqid = 1; 7248 stateidp->seqid = lyp->lay_stateid.seqid; 7249 if (offset == 0 && len == UINT64_MAX) { 7250 if ((iomode & NFSLAYOUTIOMODE_READ) != 7251 0) 7252 lyp->lay_flags &= ~NFSLAY_READ; 7253 if ((iomode & NFSLAYOUTIOMODE_RW) != 0) 7254 lyp->lay_flags &= ~NFSLAY_RW; 7255 if ((lyp->lay_flags & (NFSLAY_READ | 7256 NFSLAY_RW)) == 0) 7257 nfsrv_freelayout(&lhyp->list, 7258 lyp); 7259 else 7260 *fndp = 1; 7261 } else 7262 *fndp = 1; 7263 } 7264 NFSUNLOCKLAYOUT(lhyp); 7265 /* Search the nfsrv_recalllist for a match. */ 7266 TAILQ_FOREACH(lyp, &nfsrv_recalllisthead, lay_list) { 7267 if (NFSBCMP(&lyp->lay_fh, &fh, 7268 sizeof(fh)) == 0 && 7269 lyp->lay_clientid.qval == 7270 nd->nd_clientid.qval && 7271 stateidp->other[0] == 7272 lyp->lay_stateid.other[0] && 7273 stateidp->other[1] == 7274 lyp->lay_stateid.other[1] && 7275 stateidp->other[2] == 7276 lyp->lay_stateid.other[2]) { 7277 lyp->lay_flags |= NFSLAY_RETURNED; 7278 wakeup(lyp); 7279 error = 0; 7280 } 7281 } 7282 NFSDRECALLUNLOCK(); 7283 } 7284 if (layouttype == NFSLAYOUT_FLEXFILE) 7285 nfsrv_flexlayouterr(nd, layp, maxcnt, p); 7286 } else if (kind == NFSV4LAYOUTRET_FSID) 7287 nfsrv_freelayouts(&nd->nd_clientid, 7288 &vp->v_mount->mnt_stat.f_fsid, layouttype, iomode); 7289 else if (kind == NFSV4LAYOUTRET_ALL) 7290 nfsrv_freelayouts(&nd->nd_clientid, NULL, layouttype, iomode); 7291 else 7292 error = NFSERR_INVAL; 7293 if (error == -1) 7294 error = 0; 7295 return (error); 7296 } 7297 7298 /* 7299 * Look for an existing layout. 7300 */ 7301 static int 7302 nfsrv_findlayout(nfsquad_t *clientidp, fhandle_t *fhp, int laytype, 7303 NFSPROC_T *p, struct nfslayout **lypp) 7304 { 7305 struct nfslayouthash *lhyp; 7306 struct nfslayout *lyp; 7307 int ret; 7308 7309 *lypp = NULL; 7310 ret = 0; 7311 lhyp = NFSLAYOUTHASH(fhp); 7312 TAILQ_FOREACH(lyp, &lhyp->list, lay_list) { 7313 if (NFSBCMP(&lyp->lay_fh, fhp, sizeof(*fhp)) == 0 && 7314 lyp->lay_clientid.qval == clientidp->qval && 7315 lyp->lay_type == laytype) 7316 break; 7317 } 7318 if (lyp != NULL) 7319 *lypp = lyp; 7320 else 7321 ret = -1; 7322 return (ret); 7323 } 7324 7325 /* 7326 * Add the new layout, as required. 7327 */ 7328 static int 7329 nfsrv_addlayout(struct nfsrv_descript *nd, struct nfslayout **lypp, 7330 nfsv4stateid_t *stateidp, char *layp, int *layoutlenp, NFSPROC_T *p) 7331 { 7332 struct nfsclient *clp; 7333 struct nfslayouthash *lhyp; 7334 struct nfslayout *lyp, *nlyp; 7335 fhandle_t *fhp; 7336 int error; 7337 7338 KASSERT((nd->nd_flag & ND_IMPLIEDCLID) != 0, 7339 ("nfsrv_layoutget: no nd_clientid\n")); 7340 lyp = *lypp; 7341 fhp = &lyp->lay_fh; 7342 NFSLOCKSTATE(); 7343 error = nfsrv_getclient((nfsquad_t)((u_quad_t)0), CLOPS_RENEW, &clp, 7344 NULL, (nfsquad_t)((u_quad_t)0), 0, nd, p); 7345 if (error != 0) { 7346 NFSUNLOCKSTATE(); 7347 return (error); 7348 } 7349 lyp->lay_stateid.seqid = stateidp->seqid = 1; 7350 lyp->lay_stateid.other[0] = stateidp->other[0] = 7351 clp->lc_clientid.lval[0]; 7352 lyp->lay_stateid.other[1] = stateidp->other[1] = 7353 clp->lc_clientid.lval[1]; 7354 lyp->lay_stateid.other[2] = stateidp->other[2] = 7355 nfsrv_nextstateindex(clp); 7356 NFSUNLOCKSTATE(); 7357 7358 lhyp = NFSLAYOUTHASH(fhp); 7359 NFSLOCKLAYOUT(lhyp); 7360 TAILQ_FOREACH(nlyp, &lhyp->list, lay_list) { 7361 if (NFSBCMP(&nlyp->lay_fh, fhp, sizeof(*fhp)) == 0 && 7362 nlyp->lay_clientid.qval == nd->nd_clientid.qval) 7363 break; 7364 } 7365 if (nlyp != NULL) { 7366 /* A layout already exists, so use it. */ 7367 nlyp->lay_flags |= (lyp->lay_flags & (NFSLAY_READ | NFSLAY_RW)); 7368 NFSBCOPY(nlyp->lay_xdr, layp, nlyp->lay_layoutlen); 7369 *layoutlenp = nlyp->lay_layoutlen; 7370 if (++nlyp->lay_stateid.seqid == 0) 7371 nlyp->lay_stateid.seqid = 1; 7372 stateidp->seqid = nlyp->lay_stateid.seqid; 7373 stateidp->other[0] = nlyp->lay_stateid.other[0]; 7374 stateidp->other[1] = nlyp->lay_stateid.other[1]; 7375 stateidp->other[2] = nlyp->lay_stateid.other[2]; 7376 NFSUNLOCKLAYOUT(lhyp); 7377 return (0); 7378 } 7379 7380 /* Insert the new layout in the lists. */ 7381 *lypp = NULL; 7382 atomic_add_int(&nfsrv_layoutcnt, 1); 7383 NFSBCOPY(lyp->lay_xdr, layp, lyp->lay_layoutlen); 7384 *layoutlenp = lyp->lay_layoutlen; 7385 TAILQ_INSERT_HEAD(&lhyp->list, lyp, lay_list); 7386 NFSUNLOCKLAYOUT(lhyp); 7387 return (0); 7388 } 7389 7390 /* 7391 * Get the devinfo for a deviceid. 7392 */ 7393 int 7394 nfsrv_getdevinfo(char *devid, int layouttype, uint32_t *maxcnt, 7395 uint32_t *notify, int *devaddrlen, char **devaddr) 7396 { 7397 struct nfsdevice *ds; 7398 7399 if ((layouttype != NFSLAYOUT_NFSV4_1_FILES && layouttype != 7400 NFSLAYOUT_FLEXFILE) || 7401 (nfsrv_maxpnfsmirror > 1 && layouttype == NFSLAYOUT_NFSV4_1_FILES)) 7402 return (NFSERR_UNKNLAYOUTTYPE); 7403 7404 /* 7405 * Now, search for the device id. Note that the structures won't go 7406 * away, but the order changes in the list. As such, the lock only 7407 * needs to be held during the search through the list. 7408 */ 7409 NFSDDSLOCK(); 7410 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 7411 if (NFSBCMP(devid, ds->nfsdev_deviceid, NFSX_V4DEVICEID) == 0 && 7412 ds->nfsdev_nmp != NULL) 7413 break; 7414 } 7415 NFSDDSUNLOCK(); 7416 if (ds == NULL) 7417 return (NFSERR_NOENT); 7418 7419 /* If the correct nfsdev_XXXXaddrlen is > 0, we have the device info. */ 7420 *devaddrlen = 0; 7421 if (layouttype == NFSLAYOUT_NFSV4_1_FILES) { 7422 *devaddrlen = ds->nfsdev_fileaddrlen; 7423 *devaddr = ds->nfsdev_fileaddr; 7424 } else if (layouttype == NFSLAYOUT_FLEXFILE) { 7425 *devaddrlen = ds->nfsdev_flexaddrlen; 7426 *devaddr = ds->nfsdev_flexaddr; 7427 } 7428 if (*devaddrlen == 0) 7429 return (NFSERR_UNKNLAYOUTTYPE); 7430 7431 /* 7432 * The XDR overhead is 3 unsigned values: layout_type, 7433 * length_of_address and notify bitmap. 7434 * If the notify array is changed to not all zeros, the 7435 * count of unsigned values must be increased. 7436 */ 7437 if (*maxcnt > 0 && *maxcnt < NFSM_RNDUP(*devaddrlen) + 7438 3 * NFSX_UNSIGNED) { 7439 *maxcnt = NFSM_RNDUP(*devaddrlen) + 3 * NFSX_UNSIGNED; 7440 return (NFSERR_TOOSMALL); 7441 } 7442 return (0); 7443 } 7444 7445 /* 7446 * Free a list of layout state structures. 7447 */ 7448 static void 7449 nfsrv_freelayoutlist(nfsquad_t clientid) 7450 { 7451 struct nfslayouthash *lhyp; 7452 struct nfslayout *lyp, *nlyp; 7453 int i; 7454 7455 for (i = 0; i < nfsrv_layouthashsize; i++) { 7456 lhyp = &nfslayouthash[i]; 7457 NFSLOCKLAYOUT(lhyp); 7458 TAILQ_FOREACH_SAFE(lyp, &lhyp->list, lay_list, nlyp) { 7459 if (lyp->lay_clientid.qval == clientid.qval) 7460 nfsrv_freelayout(&lhyp->list, lyp); 7461 } 7462 NFSUNLOCKLAYOUT(lhyp); 7463 } 7464 } 7465 7466 /* 7467 * Free up a layout. 7468 */ 7469 static void 7470 nfsrv_freelayout(struct nfslayouthead *lhp, struct nfslayout *lyp) 7471 { 7472 7473 NFSD_DEBUG(4, "Freelayout=%p\n", lyp); 7474 atomic_add_int(&nfsrv_layoutcnt, -1); 7475 TAILQ_REMOVE(lhp, lyp, lay_list); 7476 free(lyp, M_NFSDSTATE); 7477 } 7478 7479 /* 7480 * Free up a device id. 7481 */ 7482 void 7483 nfsrv_freeonedevid(struct nfsdevice *ds) 7484 { 7485 int i; 7486 7487 atomic_add_int(&nfsrv_devidcnt, -1); 7488 vrele(ds->nfsdev_dvp); 7489 for (i = 0; i < nfsrv_dsdirsize; i++) 7490 if (ds->nfsdev_dsdir[i] != NULL) 7491 vrele(ds->nfsdev_dsdir[i]); 7492 free(ds->nfsdev_fileaddr, M_NFSDSTATE); 7493 free(ds->nfsdev_flexaddr, M_NFSDSTATE); 7494 free(ds->nfsdev_host, M_NFSDSTATE); 7495 free(ds, M_NFSDSTATE); 7496 } 7497 7498 /* 7499 * Free up a device id and its mirrors. 7500 */ 7501 static void 7502 nfsrv_freedevid(struct nfsdevice *ds) 7503 { 7504 7505 TAILQ_REMOVE(&nfsrv_devidhead, ds, nfsdev_list); 7506 nfsrv_freeonedevid(ds); 7507 } 7508 7509 /* 7510 * Free all layouts and device ids. 7511 * Done when the nfsd threads are shut down since there may be a new 7512 * modified device id list created when the nfsd is restarted. 7513 */ 7514 void 7515 nfsrv_freealllayoutsanddevids(void) 7516 { 7517 struct nfsdontlist *mrp, *nmrp; 7518 struct nfslayout *lyp, *nlyp; 7519 7520 /* Get rid of the deviceid structures. */ 7521 nfsrv_freealldevids(); 7522 TAILQ_INIT(&nfsrv_devidhead); 7523 nfsrv_devidcnt = 0; 7524 7525 /* Get rid of all layouts. */ 7526 nfsrv_freealllayouts(); 7527 7528 /* Get rid of any nfsdontlist entries. */ 7529 LIST_FOREACH_SAFE(mrp, &nfsrv_dontlisthead, nfsmr_list, nmrp) 7530 free(mrp, M_NFSDSTATE); 7531 LIST_INIT(&nfsrv_dontlisthead); 7532 nfsrv_dontlistlen = 0; 7533 7534 /* Free layouts in the recall list. */ 7535 TAILQ_FOREACH_SAFE(lyp, &nfsrv_recalllisthead, lay_list, nlyp) 7536 nfsrv_freelayout(&nfsrv_recalllisthead, lyp); 7537 TAILQ_INIT(&nfsrv_recalllisthead); 7538 } 7539 7540 /* 7541 * Free layouts that match the arguments. 7542 */ 7543 static void 7544 nfsrv_freelayouts(nfsquad_t *clid, fsid_t *fs, int laytype, int iomode) 7545 { 7546 struct nfslayouthash *lhyp; 7547 struct nfslayout *lyp, *nlyp; 7548 int i; 7549 7550 for (i = 0; i < nfsrv_layouthashsize; i++) { 7551 lhyp = &nfslayouthash[i]; 7552 NFSLOCKLAYOUT(lhyp); 7553 TAILQ_FOREACH_SAFE(lyp, &lhyp->list, lay_list, nlyp) { 7554 if (clid->qval != lyp->lay_clientid.qval) 7555 continue; 7556 if (fs != NULL && fsidcmp(fs, &lyp->lay_fsid) != 0) 7557 continue; 7558 if (laytype != lyp->lay_type) 7559 continue; 7560 if ((iomode & NFSLAYOUTIOMODE_READ) != 0) 7561 lyp->lay_flags &= ~NFSLAY_READ; 7562 if ((iomode & NFSLAYOUTIOMODE_RW) != 0) 7563 lyp->lay_flags &= ~NFSLAY_RW; 7564 if ((lyp->lay_flags & (NFSLAY_READ | NFSLAY_RW)) == 0) 7565 nfsrv_freelayout(&lhyp->list, lyp); 7566 } 7567 NFSUNLOCKLAYOUT(lhyp); 7568 } 7569 } 7570 7571 /* 7572 * Free all layouts for the argument file. 7573 */ 7574 void 7575 nfsrv_freefilelayouts(fhandle_t *fhp) 7576 { 7577 struct nfslayouthash *lhyp; 7578 struct nfslayout *lyp, *nlyp; 7579 7580 lhyp = NFSLAYOUTHASH(fhp); 7581 NFSLOCKLAYOUT(lhyp); 7582 TAILQ_FOREACH_SAFE(lyp, &lhyp->list, lay_list, nlyp) { 7583 if (NFSBCMP(&lyp->lay_fh, fhp, sizeof(*fhp)) == 0) 7584 nfsrv_freelayout(&lhyp->list, lyp); 7585 } 7586 NFSUNLOCKLAYOUT(lhyp); 7587 } 7588 7589 /* 7590 * Free all layouts. 7591 */ 7592 static void 7593 nfsrv_freealllayouts(void) 7594 { 7595 struct nfslayouthash *lhyp; 7596 struct nfslayout *lyp, *nlyp; 7597 int i; 7598 7599 for (i = 0; i < nfsrv_layouthashsize; i++) { 7600 lhyp = &nfslayouthash[i]; 7601 NFSLOCKLAYOUT(lhyp); 7602 TAILQ_FOREACH_SAFE(lyp, &lhyp->list, lay_list, nlyp) 7603 nfsrv_freelayout(&lhyp->list, lyp); 7604 NFSUNLOCKLAYOUT(lhyp); 7605 } 7606 } 7607 7608 /* 7609 * Look up the mount path for the DS server. 7610 */ 7611 static int 7612 nfsrv_setdsserver(char *dspathp, char *mdspathp, NFSPROC_T *p, 7613 struct nfsdevice **dsp) 7614 { 7615 struct nameidata nd; 7616 struct nfsdevice *ds; 7617 struct mount *mp; 7618 int error, i; 7619 char *dsdirpath; 7620 size_t dsdirsize; 7621 7622 NFSD_DEBUG(4, "setdssrv path=%s\n", dspathp); 7623 *dsp = NULL; 7624 NDINIT(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF, UIO_SYSSPACE, 7625 dspathp, p); 7626 error = namei(&nd); 7627 NFSD_DEBUG(4, "lookup=%d\n", error); 7628 if (error != 0) 7629 return (error); 7630 if (nd.ni_vp->v_type != VDIR) { 7631 vput(nd.ni_vp); 7632 NFSD_DEBUG(4, "dspath not dir\n"); 7633 return (ENOTDIR); 7634 } 7635 if (strcmp(nd.ni_vp->v_mount->mnt_vfc->vfc_name, "nfs") != 0) { 7636 vput(nd.ni_vp); 7637 NFSD_DEBUG(4, "dspath not an NFS mount\n"); 7638 return (ENXIO); 7639 } 7640 7641 /* 7642 * Allocate a DS server structure with the NFS mounted directory 7643 * vnode reference counted, so that a non-forced dismount will 7644 * fail with EBUSY. 7645 * This structure is always linked into the list, even if an error 7646 * is being returned. The caller will free the entire list upon 7647 * an error return. 7648 */ 7649 *dsp = ds = malloc(sizeof(*ds) + nfsrv_dsdirsize * sizeof(vnode_t), 7650 M_NFSDSTATE, M_WAITOK | M_ZERO); 7651 ds->nfsdev_dvp = nd.ni_vp; 7652 ds->nfsdev_nmp = VFSTONFS(nd.ni_vp->v_mount); 7653 NFSVOPUNLOCK(nd.ni_vp); 7654 7655 dsdirsize = strlen(dspathp) + 16; 7656 dsdirpath = malloc(dsdirsize, M_TEMP, M_WAITOK); 7657 /* Now, create the DS directory structures. */ 7658 for (i = 0; i < nfsrv_dsdirsize; i++) { 7659 snprintf(dsdirpath, dsdirsize, "%s/ds%d", dspathp, i); 7660 NDINIT(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF, 7661 UIO_SYSSPACE, dsdirpath, p); 7662 error = namei(&nd); 7663 NFSD_DEBUG(4, "dsdirpath=%s lookup=%d\n", dsdirpath, error); 7664 if (error != 0) 7665 break; 7666 if (nd.ni_vp->v_type != VDIR) { 7667 vput(nd.ni_vp); 7668 error = ENOTDIR; 7669 NFSD_DEBUG(4, "dsdirpath not a VDIR\n"); 7670 break; 7671 } 7672 if (strcmp(nd.ni_vp->v_mount->mnt_vfc->vfc_name, "nfs") != 0) { 7673 vput(nd.ni_vp); 7674 error = ENXIO; 7675 NFSD_DEBUG(4, "dsdirpath not an NFS mount\n"); 7676 break; 7677 } 7678 ds->nfsdev_dsdir[i] = nd.ni_vp; 7679 NFSVOPUNLOCK(nd.ni_vp); 7680 } 7681 free(dsdirpath, M_TEMP); 7682 7683 if (strlen(mdspathp) > 0) { 7684 /* 7685 * This DS stores file for a specific MDS exported file 7686 * system. 7687 */ 7688 NDINIT(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF, 7689 UIO_SYSSPACE, mdspathp, p); 7690 error = namei(&nd); 7691 NFSD_DEBUG(4, "mds lookup=%d\n", error); 7692 if (error != 0) 7693 goto out; 7694 if (nd.ni_vp->v_type != VDIR) { 7695 vput(nd.ni_vp); 7696 error = ENOTDIR; 7697 NFSD_DEBUG(4, "mdspath not dir\n"); 7698 goto out; 7699 } 7700 mp = nd.ni_vp->v_mount; 7701 if ((mp->mnt_flag & MNT_EXPORTED) == 0) { 7702 vput(nd.ni_vp); 7703 error = ENXIO; 7704 NFSD_DEBUG(4, "mdspath not an exported fs\n"); 7705 goto out; 7706 } 7707 ds->nfsdev_mdsfsid = mp->mnt_stat.f_fsid; 7708 ds->nfsdev_mdsisset = 1; 7709 vput(nd.ni_vp); 7710 } 7711 7712 out: 7713 TAILQ_INSERT_TAIL(&nfsrv_devidhead, ds, nfsdev_list); 7714 atomic_add_int(&nfsrv_devidcnt, 1); 7715 return (error); 7716 } 7717 7718 /* 7719 * Look up the mount path for the DS server and delete it. 7720 */ 7721 int 7722 nfsrv_deldsserver(int op, char *dspathp, NFSPROC_T *p) 7723 { 7724 struct mount *mp; 7725 struct nfsmount *nmp; 7726 struct nfsdevice *ds; 7727 int error; 7728 7729 NFSD_DEBUG(4, "deldssrv path=%s\n", dspathp); 7730 /* 7731 * Search for the path in the mount list. Avoid looking the path 7732 * up, since this mount point may be hung, with associated locked 7733 * vnodes, etc. 7734 * Set NFSMNTP_CANCELRPCS so that any forced dismount will be blocked 7735 * until this completes. 7736 * As noted in the man page, this should be done before any forced 7737 * dismount on the mount point, but at least the handshake on 7738 * NFSMNTP_CANCELRPCS should make it safe. 7739 */ 7740 error = 0; 7741 ds = NULL; 7742 nmp = NULL; 7743 mtx_lock(&mountlist_mtx); 7744 TAILQ_FOREACH(mp, &mountlist, mnt_list) { 7745 if (strcmp(mp->mnt_stat.f_mntonname, dspathp) == 0 && 7746 strcmp(mp->mnt_stat.f_fstypename, "nfs") == 0 && 7747 mp->mnt_data != NULL) { 7748 nmp = VFSTONFS(mp); 7749 NFSLOCKMNT(nmp); 7750 if ((nmp->nm_privflag & (NFSMNTP_FORCEDISM | 7751 NFSMNTP_CANCELRPCS)) == 0) { 7752 nmp->nm_privflag |= NFSMNTP_CANCELRPCS; 7753 NFSUNLOCKMNT(nmp); 7754 } else { 7755 NFSUNLOCKMNT(nmp); 7756 nmp = NULL; 7757 } 7758 break; 7759 } 7760 } 7761 mtx_unlock(&mountlist_mtx); 7762 7763 if (nmp != NULL) { 7764 ds = nfsrv_deldsnmp(op, nmp, p); 7765 NFSD_DEBUG(4, "deldsnmp=%p\n", ds); 7766 if (ds != NULL) { 7767 nfsrv_killrpcs(nmp); 7768 NFSD_DEBUG(4, "aft killrpcs\n"); 7769 } else 7770 error = ENXIO; 7771 NFSLOCKMNT(nmp); 7772 nmp->nm_privflag &= ~NFSMNTP_CANCELRPCS; 7773 wakeup(nmp); 7774 NFSUNLOCKMNT(nmp); 7775 } else 7776 error = EINVAL; 7777 return (error); 7778 } 7779 7780 /* 7781 * Search for and remove a DS entry which matches the "nmp" argument. 7782 * The nfsdevice structure pointer is returned so that the caller can 7783 * free it via nfsrv_freeonedevid(). 7784 * For the forced case, do not try to do LayoutRecalls, since the server 7785 * must be shut down now anyhow. 7786 */ 7787 struct nfsdevice * 7788 nfsrv_deldsnmp(int op, struct nfsmount *nmp, NFSPROC_T *p) 7789 { 7790 struct nfsdevice *fndds; 7791 7792 NFSD_DEBUG(4, "deldsdvp\n"); 7793 NFSDDSLOCK(); 7794 if (op == PNFSDOP_FORCEDELDS) 7795 fndds = nfsv4_findmirror(nmp); 7796 else 7797 fndds = nfsrv_findmirroredds(nmp); 7798 if (fndds != NULL) 7799 nfsrv_deleteds(fndds); 7800 NFSDDSUNLOCK(); 7801 if (fndds != NULL) { 7802 if (op != PNFSDOP_FORCEDELDS) 7803 nfsrv_flexmirrordel(fndds->nfsdev_deviceid, p); 7804 printf("pNFS server: mirror %s failed\n", fndds->nfsdev_host); 7805 } 7806 return (fndds); 7807 } 7808 7809 /* 7810 * Similar to nfsrv_deldsnmp(), except that the DS is indicated by deviceid. 7811 * This function also calls nfsrv_killrpcs() to unblock RPCs on the mount 7812 * point. 7813 * Also, returns an error instead of the nfsdevice found. 7814 */ 7815 int 7816 nfsrv_delds(char *devid, NFSPROC_T *p) 7817 { 7818 struct nfsdevice *ds, *fndds; 7819 struct nfsmount *nmp; 7820 int fndmirror; 7821 7822 NFSD_DEBUG(4, "delds\n"); 7823 /* 7824 * Search the DS server list for a match with devid. 7825 * Remove the DS entry if found and there is a mirror. 7826 */ 7827 fndds = NULL; 7828 nmp = NULL; 7829 fndmirror = 0; 7830 NFSDDSLOCK(); 7831 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 7832 if (NFSBCMP(ds->nfsdev_deviceid, devid, NFSX_V4DEVICEID) == 0 && 7833 ds->nfsdev_nmp != NULL) { 7834 NFSD_DEBUG(4, "fnd main ds\n"); 7835 fndds = ds; 7836 break; 7837 } 7838 } 7839 if (fndds == NULL) { 7840 NFSDDSUNLOCK(); 7841 return (ENXIO); 7842 } 7843 if (fndds->nfsdev_mdsisset == 0 && nfsrv_faildscnt > 0) 7844 fndmirror = 1; 7845 else if (fndds->nfsdev_mdsisset != 0) { 7846 /* For the fsid is set case, search for a mirror. */ 7847 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 7848 if (ds != fndds && ds->nfsdev_nmp != NULL && 7849 ds->nfsdev_mdsisset != 0 && 7850 fsidcmp(&ds->nfsdev_mdsfsid, 7851 &fndds->nfsdev_mdsfsid) == 0) { 7852 fndmirror = 1; 7853 break; 7854 } 7855 } 7856 } 7857 if (fndmirror != 0) { 7858 nmp = fndds->nfsdev_nmp; 7859 NFSLOCKMNT(nmp); 7860 if ((nmp->nm_privflag & (NFSMNTP_FORCEDISM | 7861 NFSMNTP_CANCELRPCS)) == 0) { 7862 nmp->nm_privflag |= NFSMNTP_CANCELRPCS; 7863 NFSUNLOCKMNT(nmp); 7864 nfsrv_deleteds(fndds); 7865 } else { 7866 NFSUNLOCKMNT(nmp); 7867 nmp = NULL; 7868 } 7869 } 7870 NFSDDSUNLOCK(); 7871 if (nmp != NULL) { 7872 nfsrv_flexmirrordel(fndds->nfsdev_deviceid, p); 7873 printf("pNFS server: mirror %s failed\n", fndds->nfsdev_host); 7874 nfsrv_killrpcs(nmp); 7875 NFSLOCKMNT(nmp); 7876 nmp->nm_privflag &= ~NFSMNTP_CANCELRPCS; 7877 wakeup(nmp); 7878 NFSUNLOCKMNT(nmp); 7879 return (0); 7880 } 7881 return (ENXIO); 7882 } 7883 7884 /* 7885 * Mark a DS as disabled by setting nfsdev_nmp = NULL. 7886 */ 7887 static void 7888 nfsrv_deleteds(struct nfsdevice *fndds) 7889 { 7890 7891 NFSD_DEBUG(4, "deleteds: deleting a mirror\n"); 7892 fndds->nfsdev_nmp = NULL; 7893 if (fndds->nfsdev_mdsisset == 0) 7894 nfsrv_faildscnt--; 7895 } 7896 7897 /* 7898 * Fill in the addr structures for the File and Flex File layouts. 7899 */ 7900 static void 7901 nfsrv_allocdevid(struct nfsdevice *ds, char *addr, char *dnshost) 7902 { 7903 uint32_t *tl; 7904 char *netprot; 7905 int addrlen; 7906 static uint64_t new_devid = 0; 7907 7908 if (strchr(addr, ':') != NULL) 7909 netprot = "tcp6"; 7910 else 7911 netprot = "tcp"; 7912 7913 /* Fill in the device id. */ 7914 NFSBCOPY(&nfsdev_time, ds->nfsdev_deviceid, sizeof(nfsdev_time)); 7915 new_devid++; 7916 NFSBCOPY(&new_devid, &ds->nfsdev_deviceid[sizeof(nfsdev_time)], 7917 sizeof(new_devid)); 7918 7919 /* 7920 * Fill in the file addr (actually the nfsv4_file_layout_ds_addr4 7921 * as defined in RFC5661) in XDR. 7922 */ 7923 addrlen = NFSM_RNDUP(strlen(addr)) + NFSM_RNDUP(strlen(netprot)) + 7924 6 * NFSX_UNSIGNED; 7925 NFSD_DEBUG(4, "hn=%s addr=%s netprot=%s\n", dnshost, addr, netprot); 7926 ds->nfsdev_fileaddrlen = addrlen; 7927 tl = malloc(addrlen, M_NFSDSTATE, M_WAITOK | M_ZERO); 7928 ds->nfsdev_fileaddr = (char *)tl; 7929 *tl++ = txdr_unsigned(1); /* One stripe with index 0. */ 7930 *tl++ = 0; 7931 *tl++ = txdr_unsigned(1); /* One multipath list */ 7932 *tl++ = txdr_unsigned(1); /* with one entry in it. */ 7933 /* The netaddr for this one entry. */ 7934 *tl++ = txdr_unsigned(strlen(netprot)); 7935 NFSBCOPY(netprot, tl, strlen(netprot)); 7936 tl += (NFSM_RNDUP(strlen(netprot)) / NFSX_UNSIGNED); 7937 *tl++ = txdr_unsigned(strlen(addr)); 7938 NFSBCOPY(addr, tl, strlen(addr)); 7939 7940 /* 7941 * Fill in the flex file addr (actually the ff_device_addr4 7942 * as defined for Flexible File Layout) in XDR. 7943 */ 7944 addrlen = NFSM_RNDUP(strlen(addr)) + NFSM_RNDUP(strlen(netprot)) + 7945 14 * NFSX_UNSIGNED; 7946 ds->nfsdev_flexaddrlen = addrlen; 7947 tl = malloc(addrlen, M_NFSDSTATE, M_WAITOK | M_ZERO); 7948 ds->nfsdev_flexaddr = (char *)tl; 7949 *tl++ = txdr_unsigned(1); /* One multipath entry. */ 7950 /* The netaddr for this one entry. */ 7951 *tl++ = txdr_unsigned(strlen(netprot)); 7952 NFSBCOPY(netprot, tl, strlen(netprot)); 7953 tl += (NFSM_RNDUP(strlen(netprot)) / NFSX_UNSIGNED); 7954 *tl++ = txdr_unsigned(strlen(addr)); 7955 NFSBCOPY(addr, tl, strlen(addr)); 7956 tl += (NFSM_RNDUP(strlen(addr)) / NFSX_UNSIGNED); 7957 *tl++ = txdr_unsigned(2); /* Two NFS Versions. */ 7958 *tl++ = txdr_unsigned(NFS_VER4); /* NFSv4. */ 7959 *tl++ = txdr_unsigned(NFSV42_MINORVERSION); /* Minor version 2. */ 7960 *tl++ = txdr_unsigned(NFS_SRVMAXIO); /* DS max rsize. */ 7961 *tl++ = txdr_unsigned(NFS_SRVMAXIO); /* DS max wsize. */ 7962 *tl++ = newnfs_true; /* Tightly coupled. */ 7963 *tl++ = txdr_unsigned(NFS_VER4); /* NFSv4. */ 7964 *tl++ = txdr_unsigned(NFSV41_MINORVERSION); /* Minor version 1. */ 7965 *tl++ = txdr_unsigned(NFS_SRVMAXIO); /* DS max rsize. */ 7966 *tl++ = txdr_unsigned(NFS_SRVMAXIO); /* DS max wsize. */ 7967 *tl = newnfs_true; /* Tightly coupled. */ 7968 7969 ds->nfsdev_hostnamelen = strlen(dnshost); 7970 ds->nfsdev_host = malloc(ds->nfsdev_hostnamelen + 1, M_NFSDSTATE, 7971 M_WAITOK); 7972 NFSBCOPY(dnshost, ds->nfsdev_host, ds->nfsdev_hostnamelen + 1); 7973 } 7974 7975 /* 7976 * Create the device id list. 7977 * Return 0 if the nfsd threads are to run and ENXIO if the "-p" argument 7978 * is misconfigured. 7979 */ 7980 int 7981 nfsrv_createdevids(struct nfsd_nfsd_args *args, NFSPROC_T *p) 7982 { 7983 struct nfsdevice *ds; 7984 char *addrp, *dnshostp, *dspathp, *mdspathp; 7985 int error, i; 7986 7987 addrp = args->addr; 7988 dnshostp = args->dnshost; 7989 dspathp = args->dspath; 7990 mdspathp = args->mdspath; 7991 nfsrv_maxpnfsmirror = args->mirrorcnt; 7992 if (addrp == NULL || dnshostp == NULL || dspathp == NULL || 7993 mdspathp == NULL) 7994 return (0); 7995 7996 /* 7997 * Loop around for each nul-terminated string in args->addr, 7998 * args->dnshost, args->dnspath and args->mdspath. 7999 */ 8000 while (addrp < (args->addr + args->addrlen) && 8001 dnshostp < (args->dnshost + args->dnshostlen) && 8002 dspathp < (args->dspath + args->dspathlen) && 8003 mdspathp < (args->mdspath + args->mdspathlen)) { 8004 error = nfsrv_setdsserver(dspathp, mdspathp, p, &ds); 8005 if (error != 0) { 8006 /* Free all DS servers. */ 8007 nfsrv_freealldevids(); 8008 nfsrv_devidcnt = 0; 8009 return (ENXIO); 8010 } 8011 nfsrv_allocdevid(ds, addrp, dnshostp); 8012 addrp += (strlen(addrp) + 1); 8013 dnshostp += (strlen(dnshostp) + 1); 8014 dspathp += (strlen(dspathp) + 1); 8015 mdspathp += (strlen(mdspathp) + 1); 8016 } 8017 if (nfsrv_devidcnt < nfsrv_maxpnfsmirror) { 8018 /* Free all DS servers. */ 8019 nfsrv_freealldevids(); 8020 nfsrv_devidcnt = 0; 8021 nfsrv_maxpnfsmirror = 1; 8022 return (ENXIO); 8023 } 8024 /* We can fail at most one less DS than the mirror level. */ 8025 nfsrv_faildscnt = nfsrv_maxpnfsmirror - 1; 8026 8027 /* 8028 * Allocate the nfslayout hash table now, since this is a pNFS server. 8029 * Make it 1% of the high water mark and at least 100. 8030 */ 8031 if (nfslayouthash == NULL) { 8032 nfsrv_layouthashsize = nfsrv_layouthighwater / 100; 8033 if (nfsrv_layouthashsize < 100) 8034 nfsrv_layouthashsize = 100; 8035 nfslayouthash = mallocarray(nfsrv_layouthashsize, 8036 sizeof(struct nfslayouthash), M_NFSDSESSION, M_WAITOK | 8037 M_ZERO); 8038 for (i = 0; i < nfsrv_layouthashsize; i++) { 8039 mtx_init(&nfslayouthash[i].mtx, "nfslm", NULL, MTX_DEF); 8040 TAILQ_INIT(&nfslayouthash[i].list); 8041 } 8042 } 8043 return (0); 8044 } 8045 8046 /* 8047 * Free all device ids. 8048 */ 8049 static void 8050 nfsrv_freealldevids(void) 8051 { 8052 struct nfsdevice *ds, *nds; 8053 8054 TAILQ_FOREACH_SAFE(ds, &nfsrv_devidhead, nfsdev_list, nds) 8055 nfsrv_freedevid(ds); 8056 } 8057 8058 /* 8059 * Check to see if there is a Read/Write Layout plus either: 8060 * - A Write Delegation 8061 * or 8062 * - An Open with Write_access. 8063 * Return 1 if this is the case and 0 otherwise. 8064 * This function is used by nfsrv_proxyds() to decide if doing a Proxy 8065 * Getattr RPC to the Data Server (DS) is necessary. 8066 */ 8067 #define NFSCLIDVECSIZE 6 8068 int 8069 nfsrv_checkdsattr(vnode_t vp, NFSPROC_T *p) 8070 { 8071 fhandle_t fh, *tfhp; 8072 struct nfsstate *stp; 8073 struct nfslayout *lyp; 8074 struct nfslayouthash *lhyp; 8075 struct nfslockhashhead *hp; 8076 struct nfslockfile *lfp; 8077 nfsquad_t clid[NFSCLIDVECSIZE]; 8078 int clidcnt, ret; 8079 8080 ret = nfsvno_getfh(vp, &fh, p); 8081 if (ret != 0) 8082 return (0); 8083 8084 /* First check for a Read/Write Layout. */ 8085 clidcnt = 0; 8086 lhyp = NFSLAYOUTHASH(&fh); 8087 NFSLOCKLAYOUT(lhyp); 8088 TAILQ_FOREACH(lyp, &lhyp->list, lay_list) { 8089 if (NFSBCMP(&lyp->lay_fh, &fh, sizeof(fh)) == 0 && 8090 ((lyp->lay_flags & NFSLAY_RW) != 0 || 8091 ((lyp->lay_flags & NFSLAY_READ) != 0 && 8092 nfsrv_pnfsatime != 0))) { 8093 if (clidcnt < NFSCLIDVECSIZE) 8094 clid[clidcnt].qval = lyp->lay_clientid.qval; 8095 clidcnt++; 8096 } 8097 } 8098 NFSUNLOCKLAYOUT(lhyp); 8099 if (clidcnt == 0) { 8100 /* None found, so return 0. */ 8101 return (0); 8102 } 8103 8104 /* Get the nfslockfile for this fh. */ 8105 NFSLOCKSTATE(); 8106 hp = NFSLOCKHASH(&fh); 8107 LIST_FOREACH(lfp, hp, lf_hash) { 8108 tfhp = &lfp->lf_fh; 8109 if (NFSVNO_CMPFH(&fh, tfhp)) 8110 break; 8111 } 8112 if (lfp == NULL) { 8113 /* None found, so return 0. */ 8114 NFSUNLOCKSTATE(); 8115 return (0); 8116 } 8117 8118 /* Now, look for a Write delegation for this clientid. */ 8119 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) { 8120 if ((stp->ls_flags & NFSLCK_DELEGWRITE) != 0 && 8121 nfsrv_fndclid(clid, stp->ls_clp->lc_clientid, clidcnt) != 0) 8122 break; 8123 } 8124 if (stp != NULL) { 8125 /* Found one, so return 1. */ 8126 NFSUNLOCKSTATE(); 8127 return (1); 8128 } 8129 8130 /* No Write delegation, so look for an Open with Write_access. */ 8131 LIST_FOREACH(stp, &lfp->lf_open, ls_file) { 8132 KASSERT((stp->ls_flags & NFSLCK_OPEN) != 0, 8133 ("nfsrv_checkdsattr: Non-open in Open list\n")); 8134 if ((stp->ls_flags & NFSLCK_WRITEACCESS) != 0 && 8135 nfsrv_fndclid(clid, stp->ls_clp->lc_clientid, clidcnt) != 0) 8136 break; 8137 } 8138 NFSUNLOCKSTATE(); 8139 if (stp != NULL) 8140 return (1); 8141 return (0); 8142 } 8143 8144 /* 8145 * Look for a matching clientid in the vector. Return 1 if one might match. 8146 */ 8147 static int 8148 nfsrv_fndclid(nfsquad_t *clidvec, nfsquad_t clid, int clidcnt) 8149 { 8150 int i; 8151 8152 /* If too many for the vector, return 1 since there might be a match. */ 8153 if (clidcnt > NFSCLIDVECSIZE) 8154 return (1); 8155 8156 for (i = 0; i < clidcnt; i++) 8157 if (clidvec[i].qval == clid.qval) 8158 return (1); 8159 return (0); 8160 } 8161 8162 /* 8163 * Check the don't list for "vp" and see if issuing an rw layout is allowed. 8164 * Return 1 if issuing an rw layout isn't allowed, 0 otherwise. 8165 */ 8166 static int 8167 nfsrv_dontlayout(fhandle_t *fhp) 8168 { 8169 struct nfsdontlist *mrp; 8170 int ret; 8171 8172 if (nfsrv_dontlistlen == 0) 8173 return (0); 8174 ret = 0; 8175 NFSDDONTLISTLOCK(); 8176 LIST_FOREACH(mrp, &nfsrv_dontlisthead, nfsmr_list) { 8177 if (NFSBCMP(fhp, &mrp->nfsmr_fh, sizeof(*fhp)) == 0 && 8178 (mrp->nfsmr_flags & NFSMR_DONTLAYOUT) != 0) { 8179 ret = 1; 8180 break; 8181 } 8182 } 8183 NFSDDONTLISTUNLOCK(); 8184 return (ret); 8185 } 8186 8187 #define PNFSDS_COPYSIZ 65536 8188 /* 8189 * Create a new file on a DS and copy the contents of an extant DS file to it. 8190 * This can be used for recovery of a DS file onto a recovered DS. 8191 * The steps are: 8192 * - When called, the MDS file's vnode is locked, blocking LayoutGet operations. 8193 * - Disable issuing of read/write layouts for the file via the nfsdontlist, 8194 * so that they will be disabled after the MDS file's vnode is unlocked. 8195 * - Set up the nfsrv_recalllist so that recall of read/write layouts can 8196 * be done. 8197 * - Unlock the MDS file's vnode, so that the client(s) can perform proxied 8198 * writes, LayoutCommits and LayoutReturns for the file when completing the 8199 * LayoutReturn requested by the LayoutRecall callback. 8200 * - Issue a LayoutRecall callback for all read/write layouts and wait for 8201 * them to be returned. (If the LayoutRecall callback replies 8202 * NFSERR_NOMATCHLAYOUT, they are gone and no LayoutReturn is needed.) 8203 * - Exclusively lock the MDS file's vnode. This ensures that no proxied 8204 * writes are in progress or can occur during the DS file copy. 8205 * It also blocks Setattr operations. 8206 * - Create the file on the recovered mirror. 8207 * - Copy the file from the operational DS. 8208 * - Copy any ACL from the MDS file to the new DS file. 8209 * - Set the modify time of the new DS file to that of the MDS file. 8210 * - Update the extended attribute for the MDS file. 8211 * - Enable issuing of rw layouts by deleting the nfsdontlist entry. 8212 * - The caller will unlock the MDS file's vnode allowing operations 8213 * to continue normally, since it is now on the mirror again. 8214 */ 8215 int 8216 nfsrv_copymr(vnode_t vp, vnode_t fvp, vnode_t dvp, struct nfsdevice *ds, 8217 struct pnfsdsfile *pf, struct pnfsdsfile *wpf, int mirrorcnt, 8218 struct ucred *cred, NFSPROC_T *p) 8219 { 8220 struct nfsdontlist *mrp, *nmrp; 8221 struct nfslayouthash *lhyp; 8222 struct nfslayout *lyp, *nlyp; 8223 struct nfslayouthead thl; 8224 struct mount *mp, *tvmp; 8225 struct acl *aclp; 8226 struct vattr va; 8227 struct timespec mtime; 8228 fhandle_t fh; 8229 vnode_t tvp; 8230 off_t rdpos, wrpos; 8231 ssize_t aresid; 8232 char *dat; 8233 int didprintf, ret, retacl, xfer; 8234 8235 ASSERT_VOP_LOCKED(fvp, "nfsrv_copymr fvp"); 8236 ASSERT_VOP_LOCKED(vp, "nfsrv_copymr vp"); 8237 /* 8238 * Allocate a nfsdontlist entry and set the NFSMR_DONTLAYOUT flag 8239 * so that no more RW layouts will get issued. 8240 */ 8241 ret = nfsvno_getfh(vp, &fh, p); 8242 if (ret != 0) { 8243 NFSD_DEBUG(4, "nfsrv_copymr: getfh=%d\n", ret); 8244 return (ret); 8245 } 8246 nmrp = malloc(sizeof(*nmrp), M_NFSDSTATE, M_WAITOK); 8247 nmrp->nfsmr_flags = NFSMR_DONTLAYOUT; 8248 NFSBCOPY(&fh, &nmrp->nfsmr_fh, sizeof(fh)); 8249 NFSDDONTLISTLOCK(); 8250 LIST_FOREACH(mrp, &nfsrv_dontlisthead, nfsmr_list) { 8251 if (NFSBCMP(&fh, &mrp->nfsmr_fh, sizeof(fh)) == 0) 8252 break; 8253 } 8254 if (mrp == NULL) { 8255 LIST_INSERT_HEAD(&nfsrv_dontlisthead, nmrp, nfsmr_list); 8256 mrp = nmrp; 8257 nmrp = NULL; 8258 nfsrv_dontlistlen++; 8259 NFSD_DEBUG(4, "nfsrv_copymr: in dontlist\n"); 8260 } else { 8261 NFSDDONTLISTUNLOCK(); 8262 free(nmrp, M_NFSDSTATE); 8263 NFSD_DEBUG(4, "nfsrv_copymr: dup dontlist\n"); 8264 return (ENXIO); 8265 } 8266 NFSDDONTLISTUNLOCK(); 8267 8268 /* 8269 * Search for all RW layouts for this file. Move them to the 8270 * recall list, so they can be recalled and their return noted. 8271 */ 8272 lhyp = NFSLAYOUTHASH(&fh); 8273 NFSDRECALLLOCK(); 8274 NFSLOCKLAYOUT(lhyp); 8275 TAILQ_FOREACH_SAFE(lyp, &lhyp->list, lay_list, nlyp) { 8276 if (NFSBCMP(&lyp->lay_fh, &fh, sizeof(fh)) == 0 && 8277 (lyp->lay_flags & NFSLAY_RW) != 0) { 8278 TAILQ_REMOVE(&lhyp->list, lyp, lay_list); 8279 TAILQ_INSERT_HEAD(&nfsrv_recalllisthead, lyp, lay_list); 8280 lyp->lay_trycnt = 0; 8281 } 8282 } 8283 NFSUNLOCKLAYOUT(lhyp); 8284 NFSDRECALLUNLOCK(); 8285 8286 ret = 0; 8287 mp = tvmp = NULL; 8288 didprintf = 0; 8289 TAILQ_INIT(&thl); 8290 /* Unlock the MDS vp, so that a LayoutReturn can be done on it. */ 8291 NFSVOPUNLOCK(vp); 8292 /* Now, do a recall for all layouts not yet recalled. */ 8293 tryagain: 8294 NFSDRECALLLOCK(); 8295 TAILQ_FOREACH(lyp, &nfsrv_recalllisthead, lay_list) { 8296 if (NFSBCMP(&lyp->lay_fh, &fh, sizeof(fh)) == 0 && 8297 (lyp->lay_flags & NFSLAY_RECALL) == 0) { 8298 lyp->lay_flags |= NFSLAY_RECALL; 8299 /* 8300 * The layout stateid.seqid needs to be incremented 8301 * before doing a LAYOUT_RECALL callback. 8302 */ 8303 if (++lyp->lay_stateid.seqid == 0) 8304 lyp->lay_stateid.seqid = 1; 8305 NFSDRECALLUNLOCK(); 8306 nfsrv_recalllayout(lyp->lay_clientid, &lyp->lay_stateid, 8307 &lyp->lay_fh, lyp, 0, lyp->lay_type, p); 8308 NFSD_DEBUG(4, "nfsrv_copymr: recalled layout\n"); 8309 goto tryagain; 8310 } 8311 } 8312 8313 /* Now wait for them to be returned. */ 8314 tryagain2: 8315 TAILQ_FOREACH(lyp, &nfsrv_recalllisthead, lay_list) { 8316 if (NFSBCMP(&lyp->lay_fh, &fh, sizeof(fh)) == 0) { 8317 if ((lyp->lay_flags & NFSLAY_RETURNED) != 0) { 8318 TAILQ_REMOVE(&nfsrv_recalllisthead, lyp, 8319 lay_list); 8320 TAILQ_INSERT_HEAD(&thl, lyp, lay_list); 8321 NFSD_DEBUG(4, 8322 "nfsrv_copymr: layout returned\n"); 8323 } else { 8324 lyp->lay_trycnt++; 8325 ret = mtx_sleep(lyp, NFSDRECALLMUTEXPTR, 8326 PVFS | PCATCH, "nfsmrl", hz); 8327 NFSD_DEBUG(4, "nfsrv_copymr: aft sleep=%d\n", 8328 ret); 8329 if (ret == EINTR || ret == ERESTART) 8330 break; 8331 if ((lyp->lay_flags & NFSLAY_RETURNED) == 0) { 8332 /* 8333 * Give up after 60sec and return 8334 * ENXIO, failing the copymr. 8335 * This layout will remain on the 8336 * recalllist. It can only be cleared 8337 * by restarting the nfsd. 8338 * This seems the safe way to handle 8339 * it, since it cannot be safely copied 8340 * with an outstanding RW layout. 8341 */ 8342 if (lyp->lay_trycnt >= 60) { 8343 ret = ENXIO; 8344 break; 8345 } 8346 if (didprintf == 0) { 8347 printf("nfsrv_copymr: layout " 8348 "not returned\n"); 8349 didprintf = 1; 8350 } 8351 } 8352 } 8353 goto tryagain2; 8354 } 8355 } 8356 NFSDRECALLUNLOCK(); 8357 /* We can now get rid of the layouts that have been returned. */ 8358 TAILQ_FOREACH_SAFE(lyp, &thl, lay_list, nlyp) 8359 nfsrv_freelayout(&thl, lyp); 8360 8361 /* 8362 * Do the vn_start_write() calls here, before the MDS vnode is 8363 * locked and the tvp is created (locked) in the NFS file system 8364 * that dvp is in. 8365 * For tvmp, this probably isn't necessary, since it will be an 8366 * NFS mount and they are not suspendable at this time. 8367 */ 8368 if (ret == 0) 8369 ret = vn_start_write(vp, &mp, V_WAIT | PCATCH); 8370 if (ret == 0) { 8371 tvmp = dvp->v_mount; 8372 ret = vn_start_write(NULL, &tvmp, V_WAIT | PCATCH); 8373 } 8374 8375 /* 8376 * LK_EXCLUSIVE lock the MDS vnode, so that any 8377 * proxied writes through the MDS will be blocked until we have 8378 * completed the copy and update of the extended attributes. 8379 * This will also ensure that any attributes and ACL will not be 8380 * changed until the copy is complete. 8381 */ 8382 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 8383 if (ret == 0 && VN_IS_DOOMED(vp)) { 8384 NFSD_DEBUG(4, "nfsrv_copymr: lk_exclusive doomed\n"); 8385 ret = ESTALE; 8386 } 8387 8388 /* Create the data file on the recovered DS. */ 8389 if (ret == 0) 8390 ret = nfsrv_createdsfile(vp, &fh, pf, dvp, ds, cred, p, &tvp); 8391 8392 /* Copy the DS file, if created successfully. */ 8393 if (ret == 0) { 8394 /* 8395 * Get any NFSv4 ACL on the MDS file, so that it can be set 8396 * on the new DS file. 8397 */ 8398 aclp = acl_alloc(M_WAITOK | M_ZERO); 8399 retacl = VOP_GETACL(vp, ACL_TYPE_NFS4, aclp, cred, p); 8400 if (retacl != 0 && retacl != ENOATTR) 8401 NFSD_DEBUG(1, "nfsrv_copymr: vop_getacl=%d\n", retacl); 8402 dat = malloc(PNFSDS_COPYSIZ, M_TEMP, M_WAITOK); 8403 /* Malloc a block of 0s used to check for holes. */ 8404 if (nfsrv_zeropnfsdat == NULL) 8405 nfsrv_zeropnfsdat = malloc(PNFSDS_COPYSIZ, M_TEMP, 8406 M_WAITOK | M_ZERO); 8407 rdpos = wrpos = 0; 8408 ret = VOP_GETATTR(fvp, &va, cred); 8409 aresid = 0; 8410 while (ret == 0 && aresid == 0) { 8411 ret = vn_rdwr(UIO_READ, fvp, dat, PNFSDS_COPYSIZ, 8412 rdpos, UIO_SYSSPACE, IO_NODELOCKED, cred, NULL, 8413 &aresid, p); 8414 xfer = PNFSDS_COPYSIZ - aresid; 8415 if (ret == 0 && xfer > 0) { 8416 rdpos += xfer; 8417 /* 8418 * Skip the write for holes, except for the 8419 * last block. 8420 */ 8421 if (xfer < PNFSDS_COPYSIZ || rdpos == 8422 va.va_size || NFSBCMP(dat, 8423 nfsrv_zeropnfsdat, PNFSDS_COPYSIZ) != 0) 8424 ret = vn_rdwr(UIO_WRITE, tvp, dat, xfer, 8425 wrpos, UIO_SYSSPACE, IO_NODELOCKED, 8426 cred, NULL, NULL, p); 8427 if (ret == 0) 8428 wrpos += xfer; 8429 } 8430 } 8431 8432 /* If there is an ACL and the copy succeeded, set the ACL. */ 8433 if (ret == 0 && retacl == 0) { 8434 ret = VOP_SETACL(tvp, ACL_TYPE_NFS4, aclp, cred, p); 8435 /* 8436 * Don't consider these as errors, since VOP_GETACL() 8437 * can return an ACL when they are not actually 8438 * supported. For example, for UFS, VOP_GETACL() 8439 * will return a trivial ACL based on the uid/gid/mode 8440 * when there is no ACL on the file. 8441 * This case should be recognized as a trivial ACL 8442 * by UFS's VOP_SETACL() and succeed, but... 8443 */ 8444 if (ret == ENOATTR || ret == EOPNOTSUPP || ret == EPERM) 8445 ret = 0; 8446 } 8447 8448 if (ret == 0) 8449 ret = VOP_FSYNC(tvp, MNT_WAIT, p); 8450 8451 /* Set the DS data file's modify time that of the MDS file. */ 8452 if (ret == 0) 8453 ret = VOP_GETATTR(vp, &va, cred); 8454 if (ret == 0) { 8455 mtime = va.va_mtime; 8456 VATTR_NULL(&va); 8457 va.va_mtime = mtime; 8458 ret = VOP_SETATTR(tvp, &va, cred); 8459 } 8460 8461 vput(tvp); 8462 acl_free(aclp); 8463 free(dat, M_TEMP); 8464 } 8465 if (tvmp != NULL) 8466 vn_finished_write(tvmp); 8467 8468 /* Update the extended attributes for the newly created DS file. */ 8469 if (ret == 0) 8470 ret = vn_extattr_set(vp, IO_NODELOCKED, 8471 EXTATTR_NAMESPACE_SYSTEM, "pnfsd.dsfile", 8472 sizeof(*wpf) * mirrorcnt, (char *)wpf, p); 8473 if (mp != NULL) 8474 vn_finished_write(mp); 8475 8476 /* Get rid of the dontlist entry, so that Layouts can be issued. */ 8477 NFSDDONTLISTLOCK(); 8478 LIST_REMOVE(mrp, nfsmr_list); 8479 NFSDDONTLISTUNLOCK(); 8480 free(mrp, M_NFSDSTATE); 8481 return (ret); 8482 } 8483 8484 /* 8485 * Create a data storage file on the recovered DS. 8486 */ 8487 static int 8488 nfsrv_createdsfile(vnode_t vp, fhandle_t *fhp, struct pnfsdsfile *pf, 8489 vnode_t dvp, struct nfsdevice *ds, struct ucred *cred, NFSPROC_T *p, 8490 vnode_t *tvpp) 8491 { 8492 struct vattr va, nva; 8493 int error; 8494 8495 /* Make data file name based on FH. */ 8496 error = VOP_GETATTR(vp, &va, cred); 8497 if (error == 0) { 8498 /* Set the attributes for "vp" to Setattr the DS vp. */ 8499 VATTR_NULL(&nva); 8500 nva.va_uid = va.va_uid; 8501 nva.va_gid = va.va_gid; 8502 nva.va_mode = va.va_mode; 8503 nva.va_size = 0; 8504 VATTR_NULL(&va); 8505 va.va_type = VREG; 8506 va.va_mode = nva.va_mode; 8507 NFSD_DEBUG(4, "nfsrv_dscreatefile: dvp=%p pf=%p\n", dvp, pf); 8508 error = nfsrv_dscreate(dvp, &va, &nva, fhp, pf, NULL, 8509 pf->dsf_filename, cred, p, tvpp); 8510 } 8511 return (error); 8512 } 8513 8514 /* 8515 * Look up the MDS file shared locked, and then get the extended attribute 8516 * to find the extant DS file to be copied to the new mirror. 8517 * If successful, *vpp is set to the MDS file's vp and *nvpp is 8518 * set to a DS data file for the MDS file, both exclusively locked. 8519 * The "buf" argument has the pnfsdsfile structure from the MDS file 8520 * in it and buflen is set to its length. 8521 */ 8522 int 8523 nfsrv_mdscopymr(char *mdspathp, char *dspathp, char *curdspathp, char *buf, 8524 int *buflenp, char *fname, NFSPROC_T *p, struct vnode **vpp, 8525 struct vnode **nvpp, struct pnfsdsfile **pfp, struct nfsdevice **dsp, 8526 struct nfsdevice **fdsp) 8527 { 8528 struct nameidata nd; 8529 struct vnode *vp, *curvp; 8530 struct pnfsdsfile *pf; 8531 struct nfsmount *nmp, *curnmp; 8532 int dsdir, error, mirrorcnt, ippos; 8533 8534 vp = NULL; 8535 curvp = NULL; 8536 curnmp = NULL; 8537 *dsp = NULL; 8538 *fdsp = NULL; 8539 if (dspathp == NULL && curdspathp != NULL) 8540 return (EPERM); 8541 8542 /* 8543 * Look up the MDS file shared locked. The lock will be upgraded 8544 * to an exclusive lock after any rw layouts have been returned. 8545 */ 8546 NFSD_DEBUG(4, "mdsopen path=%s\n", mdspathp); 8547 NDINIT(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF, UIO_SYSSPACE, 8548 mdspathp, p); 8549 error = namei(&nd); 8550 NFSD_DEBUG(4, "lookup=%d\n", error); 8551 if (error != 0) 8552 return (error); 8553 if (nd.ni_vp->v_type != VREG) { 8554 vput(nd.ni_vp); 8555 NFSD_DEBUG(4, "mdspath not reg\n"); 8556 return (EISDIR); 8557 } 8558 vp = nd.ni_vp; 8559 8560 if (curdspathp != NULL) { 8561 /* 8562 * Look up the current DS path and find the nfsdev structure for 8563 * it. 8564 */ 8565 NFSD_DEBUG(4, "curmdsdev path=%s\n", curdspathp); 8566 NDINIT(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF, 8567 UIO_SYSSPACE, curdspathp, p); 8568 error = namei(&nd); 8569 NFSD_DEBUG(4, "ds lookup=%d\n", error); 8570 if (error != 0) { 8571 vput(vp); 8572 return (error); 8573 } 8574 if (nd.ni_vp->v_type != VDIR) { 8575 vput(nd.ni_vp); 8576 vput(vp); 8577 NFSD_DEBUG(4, "curdspath not dir\n"); 8578 return (ENOTDIR); 8579 } 8580 if (strcmp(nd.ni_vp->v_mount->mnt_vfc->vfc_name, "nfs") != 0) { 8581 vput(nd.ni_vp); 8582 vput(vp); 8583 NFSD_DEBUG(4, "curdspath not an NFS mount\n"); 8584 return (ENXIO); 8585 } 8586 curnmp = VFSTONFS(nd.ni_vp->v_mount); 8587 8588 /* Search the nfsdev list for a match. */ 8589 NFSDDSLOCK(); 8590 *fdsp = nfsv4_findmirror(curnmp); 8591 NFSDDSUNLOCK(); 8592 if (*fdsp == NULL) 8593 curnmp = NULL; 8594 if (curnmp == NULL) { 8595 vput(nd.ni_vp); 8596 vput(vp); 8597 NFSD_DEBUG(4, "mdscopymr: no current ds\n"); 8598 return (ENXIO); 8599 } 8600 curvp = nd.ni_vp; 8601 } 8602 8603 if (dspathp != NULL) { 8604 /* Look up the nfsdev path and find the nfsdev structure. */ 8605 NFSD_DEBUG(4, "mdsdev path=%s\n", dspathp); 8606 NDINIT(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF, 8607 UIO_SYSSPACE, dspathp, p); 8608 error = namei(&nd); 8609 NFSD_DEBUG(4, "ds lookup=%d\n", error); 8610 if (error != 0) { 8611 vput(vp); 8612 if (curvp != NULL) 8613 vput(curvp); 8614 return (error); 8615 } 8616 if (nd.ni_vp->v_type != VDIR || nd.ni_vp == curvp) { 8617 vput(nd.ni_vp); 8618 vput(vp); 8619 if (curvp != NULL) 8620 vput(curvp); 8621 NFSD_DEBUG(4, "dspath not dir\n"); 8622 if (nd.ni_vp == curvp) 8623 return (EPERM); 8624 return (ENOTDIR); 8625 } 8626 if (strcmp(nd.ni_vp->v_mount->mnt_vfc->vfc_name, "nfs") != 0) { 8627 vput(nd.ni_vp); 8628 vput(vp); 8629 if (curvp != NULL) 8630 vput(curvp); 8631 NFSD_DEBUG(4, "dspath not an NFS mount\n"); 8632 return (ENXIO); 8633 } 8634 nmp = VFSTONFS(nd.ni_vp->v_mount); 8635 8636 /* 8637 * Search the nfsdevice list for a match. If curnmp == NULL, 8638 * this is a recovery and there must be a mirror. 8639 */ 8640 NFSDDSLOCK(); 8641 if (curnmp == NULL) 8642 *dsp = nfsrv_findmirroredds(nmp); 8643 else 8644 *dsp = nfsv4_findmirror(nmp); 8645 NFSDDSUNLOCK(); 8646 if (*dsp == NULL) { 8647 vput(nd.ni_vp); 8648 vput(vp); 8649 if (curvp != NULL) 8650 vput(curvp); 8651 NFSD_DEBUG(4, "mdscopymr: no ds\n"); 8652 return (ENXIO); 8653 } 8654 } else { 8655 nd.ni_vp = NULL; 8656 nmp = NULL; 8657 } 8658 8659 /* 8660 * Get a vp for an available DS data file using the extended 8661 * attribute on the MDS file. 8662 * If there is a valid entry for the new DS in the extended attribute 8663 * on the MDS file (as checked via the nmp argument), 8664 * nfsrv_dsgetsockmnt() returns EEXIST, so no copying will occur. 8665 */ 8666 error = nfsrv_dsgetsockmnt(vp, 0, buf, buflenp, &mirrorcnt, p, 8667 NULL, NULL, NULL, fname, nvpp, &nmp, curnmp, &ippos, &dsdir); 8668 if (curvp != NULL) 8669 vput(curvp); 8670 if (nd.ni_vp == NULL) { 8671 if (error == 0 && nmp != NULL) { 8672 /* Search the nfsdev list for a match. */ 8673 NFSDDSLOCK(); 8674 *dsp = nfsrv_findmirroredds(nmp); 8675 NFSDDSUNLOCK(); 8676 } 8677 if (error == 0 && (nmp == NULL || *dsp == NULL)) { 8678 if (nvpp != NULL && *nvpp != NULL) { 8679 vput(*nvpp); 8680 *nvpp = NULL; 8681 } 8682 error = ENXIO; 8683 } 8684 } else 8685 vput(nd.ni_vp); 8686 8687 /* 8688 * When dspathp != NULL and curdspathp == NULL, this is a recovery 8689 * and is only allowed if there is a 0.0.0.0 IP address entry. 8690 * When curdspathp != NULL, the ippos will be set to that entry. 8691 */ 8692 if (error == 0 && dspathp != NULL && ippos == -1) { 8693 if (nvpp != NULL && *nvpp != NULL) { 8694 vput(*nvpp); 8695 *nvpp = NULL; 8696 } 8697 error = ENXIO; 8698 } 8699 if (error == 0) { 8700 *vpp = vp; 8701 8702 pf = (struct pnfsdsfile *)buf; 8703 if (ippos == -1) { 8704 /* If no zeroip pnfsdsfile, add one. */ 8705 ippos = *buflenp / sizeof(*pf); 8706 *buflenp += sizeof(*pf); 8707 pf += ippos; 8708 pf->dsf_dir = dsdir; 8709 strlcpy(pf->dsf_filename, fname, 8710 sizeof(pf->dsf_filename)); 8711 } else 8712 pf += ippos; 8713 *pfp = pf; 8714 } else 8715 vput(vp); 8716 return (error); 8717 } 8718 8719 /* 8720 * Search for a matching pnfsd mirror device structure, base on the nmp arg. 8721 * Return one if found, NULL otherwise. 8722 */ 8723 static struct nfsdevice * 8724 nfsrv_findmirroredds(struct nfsmount *nmp) 8725 { 8726 struct nfsdevice *ds, *fndds; 8727 int fndmirror; 8728 8729 mtx_assert(NFSDDSMUTEXPTR, MA_OWNED); 8730 /* 8731 * Search the DS server list for a match with nmp. 8732 * Remove the DS entry if found and there is a mirror. 8733 */ 8734 fndds = NULL; 8735 fndmirror = 0; 8736 if (nfsrv_devidcnt == 0) 8737 return (fndds); 8738 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 8739 if (ds->nfsdev_nmp == nmp) { 8740 NFSD_DEBUG(4, "nfsrv_findmirroredds: fnd main ds\n"); 8741 fndds = ds; 8742 break; 8743 } 8744 } 8745 if (fndds == NULL) 8746 return (fndds); 8747 if (fndds->nfsdev_mdsisset == 0 && nfsrv_faildscnt > 0) 8748 fndmirror = 1; 8749 else if (fndds->nfsdev_mdsisset != 0) { 8750 /* For the fsid is set case, search for a mirror. */ 8751 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 8752 if (ds != fndds && ds->nfsdev_nmp != NULL && 8753 ds->nfsdev_mdsisset != 0 && 8754 fsidcmp(&ds->nfsdev_mdsfsid, 8755 &fndds->nfsdev_mdsfsid) == 0) { 8756 fndmirror = 1; 8757 break; 8758 } 8759 } 8760 } 8761 if (fndmirror == 0) { 8762 NFSD_DEBUG(4, "nfsrv_findmirroredds: no mirror for DS\n"); 8763 return (NULL); 8764 } 8765 return (fndds); 8766 } 8767