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 int nfsrv_issuedelegs = 0; 39 int nfsrv_dolocallocks = 0; 40 struct nfsv4lock nfsv4rootfs_lock; 41 time_t nfsdev_time = 0; 42 int nfsrv_layouthashsize; 43 volatile int nfsrv_layoutcnt = 0; 44 45 NFSD_VNET_DEFINE(struct nfsrv_stablefirst, nfsrv_stablefirst); 46 47 NFSD_VNET_DECLARE(int, nfsrv_numnfsd); 48 NFSD_VNET_DECLARE(struct nfsstatsv1 *, nfsstatsv1_p); 49 50 extern uint32_t nfs_srvmaxio; 51 extern int nfsrv_lease; 52 extern struct timeval nfsboottime; 53 extern u_int32_t newnfs_true, newnfs_false; 54 extern struct mtx nfsrv_dslock_mtx; 55 extern struct mtx nfsrv_recalllock_mtx; 56 extern struct mtx nfsrv_dontlistlock_mtx; 57 extern int nfsd_debuglevel; 58 extern u_int nfsrv_dsdirsize; 59 extern struct nfsdevicehead nfsrv_devidhead; 60 extern int nfsrv_doflexfile; 61 extern int nfsrv_maxpnfsmirror; 62 NFSV4ROOTLOCKMUTEX; 63 NFSSTATESPINLOCK; 64 extern struct nfsdontlisthead nfsrv_dontlisthead; 65 extern volatile int nfsrv_devidcnt; 66 extern struct nfslayouthead nfsrv_recalllisthead; 67 extern char *nfsrv_zeropnfsdat; 68 69 SYSCTL_DECL(_vfs_nfsd); 70 int nfsrv_statehashsize = NFSSTATEHASHSIZE; 71 SYSCTL_INT(_vfs_nfsd, OID_AUTO, statehashsize, CTLFLAG_RDTUN, 72 &nfsrv_statehashsize, 0, 73 "Size of state hash table set via loader.conf"); 74 75 int nfsrv_clienthashsize = NFSCLIENTHASHSIZE; 76 SYSCTL_INT(_vfs_nfsd, OID_AUTO, clienthashsize, CTLFLAG_RDTUN, 77 &nfsrv_clienthashsize, 0, 78 "Size of client hash table set via loader.conf"); 79 80 int nfsrv_lockhashsize = NFSLOCKHASHSIZE; 81 SYSCTL_INT(_vfs_nfsd, OID_AUTO, fhhashsize, CTLFLAG_RDTUN, 82 &nfsrv_lockhashsize, 0, 83 "Size of file handle hash table set via loader.conf"); 84 85 int nfsrv_sessionhashsize = NFSSESSIONHASHSIZE; 86 SYSCTL_INT(_vfs_nfsd, OID_AUTO, sessionhashsize, CTLFLAG_RDTUN, 87 &nfsrv_sessionhashsize, 0, 88 "Size of session hash table set via loader.conf"); 89 90 int nfsrv_layouthighwater = NFSLAYOUTHIGHWATER; 91 SYSCTL_INT(_vfs_nfsd, OID_AUTO, layouthighwater, CTLFLAG_RDTUN, 92 &nfsrv_layouthighwater, 0, 93 "High water mark for number of layouts set via loader.conf"); 94 95 static int nfsrv_v4statelimit = NFSRV_V4STATELIMIT; 96 SYSCTL_INT(_vfs_nfsd, OID_AUTO, v4statelimit, CTLFLAG_RWTUN, 97 &nfsrv_v4statelimit, 0, 98 "High water limit for NFSv4 opens+locks+delegations"); 99 100 static int nfsrv_writedelegifpos = 0; 101 SYSCTL_INT(_vfs_nfsd, OID_AUTO, writedelegifpos, CTLFLAG_RW, 102 &nfsrv_writedelegifpos, 0, 103 "Issue a write delegation for read opens if possible"); 104 105 static int nfsrv_allowreadforwriteopen = 1; 106 SYSCTL_INT(_vfs_nfsd, OID_AUTO, allowreadforwriteopen, CTLFLAG_RW, 107 &nfsrv_allowreadforwriteopen, 0, 108 "Allow Reads to be done with Write Access StateIDs"); 109 110 int nfsrv_pnfsatime = 0; 111 SYSCTL_INT(_vfs_nfsd, OID_AUTO, pnfsstrictatime, CTLFLAG_RW, 112 &nfsrv_pnfsatime, 0, 113 "For pNFS service, do Getattr ops to keep atime up-to-date"); 114 115 int nfsrv_flexlinuxhack = 0; 116 SYSCTL_INT(_vfs_nfsd, OID_AUTO, flexlinuxhack, CTLFLAG_RW, 117 &nfsrv_flexlinuxhack, 0, 118 "For Linux clients, hack around Flex File Layout bug"); 119 120 /* 121 * Hash lists for nfs V4. 122 */ 123 NFSD_VNET_DEFINE(struct nfsclienthashhead *, nfsclienthash); 124 NFSD_VNET_DEFINE(struct nfslockhashhead *, nfslockhash); 125 NFSD_VNET_DEFINE(struct nfssessionhash *, nfssessionhash); 126 127 struct nfslayouthash *nfslayouthash; 128 volatile int nfsrv_dontlistlen = 0; 129 130 static u_int32_t nfsrv_openpluslock = 0, nfsrv_delegatecnt = 0; 131 static int nfsrv_returnoldstateid = 0, nfsrv_clients = 0; 132 static int nfsrv_clienthighwater = NFSRV_CLIENTHIGHWATER; 133 static int nfsrv_nogsscallback = 0; 134 static volatile int nfsrv_writedelegcnt = 0; 135 static int nfsrv_faildscnt; 136 137 NFSD_VNET_DEFINE_STATIC(time_t, nfsrvboottime); 138 139 /* local functions */ 140 static void nfsrv_dumpaclient(struct nfsclient *clp, 141 struct nfsd_dumpclients *dumpp); 142 static void nfsrv_freeopenowner(struct nfsstate *stp, int cansleep, 143 NFSPROC_T *p); 144 static int nfsrv_freeopen(struct nfsstate *stp, vnode_t vp, int cansleep, 145 NFSPROC_T *p); 146 static void nfsrv_freelockowner(struct nfsstate *stp, vnode_t vp, int cansleep, 147 NFSPROC_T *p); 148 static void nfsrv_freeallnfslocks(struct nfsstate *stp, vnode_t vp, 149 int cansleep, NFSPROC_T *p); 150 static void nfsrv_freenfslock(struct nfslock *lop); 151 static void nfsrv_freenfslockfile(struct nfslockfile *lfp); 152 static void nfsrv_freedeleg(struct nfsstate *); 153 static int nfsrv_getstate(struct nfsclient *clp, nfsv4stateid_t *stateidp, 154 u_int32_t flags, struct nfsstate **stpp); 155 static void nfsrv_getowner(struct nfsstatehead *hp, struct nfsstate *new_stp, 156 struct nfsstate **stpp); 157 static int nfsrv_getlockfh(vnode_t vp, u_short flags, 158 struct nfslockfile *new_lfp, fhandle_t *nfhp, NFSPROC_T *p); 159 static int nfsrv_getlockfile(u_short flags, struct nfslockfile **new_lfpp, 160 struct nfslockfile **lfpp, fhandle_t *nfhp, int lockit); 161 static void nfsrv_insertlock(struct nfslock *new_lop, 162 struct nfslock *insert_lop, struct nfsstate *stp, struct nfslockfile *lfp); 163 static void nfsrv_updatelock(struct nfsstate *stp, struct nfslock **new_lopp, 164 struct nfslock **other_lopp, struct nfslockfile *lfp); 165 static int nfsrv_getipnumber(u_char *cp); 166 static int nfsrv_checkrestart(nfsquad_t clientid, u_int32_t flags, 167 nfsv4stateid_t *stateidp, int specialid); 168 static int nfsrv_checkgrace(struct nfsrv_descript *nd, struct nfsclient *clp, 169 u_int32_t flags); 170 static int nfsrv_docallback(struct nfsclient *clp, int procnum, 171 nfsv4stateid_t *stateidp, int trunc, fhandle_t *fhp, 172 struct nfsvattr *nap, nfsattrbit_t *attrbitp, int laytype, NFSPROC_T *p); 173 static int nfsrv_cbcallargs(struct nfsrv_descript *nd, struct nfsclient *clp, 174 uint32_t callback, int op, const char *optag, struct nfsdsession **sepp, 175 int *slotposp); 176 static u_int32_t nfsrv_nextclientindex(void); 177 static u_int32_t nfsrv_nextstateindex(struct nfsclient *clp); 178 static void nfsrv_markstable(struct nfsclient *clp); 179 static void nfsrv_markreclaim(struct nfsclient *clp); 180 static int nfsrv_checkstable(struct nfsclient *clp); 181 static int nfsrv_clientconflict(struct nfsclient *clp, int *haslockp, struct 182 vnode *vp, NFSPROC_T *p); 183 static int nfsrv_delegconflict(struct nfsstate *stp, int *haslockp, 184 NFSPROC_T *p, vnode_t vp); 185 static int nfsrv_cleandeleg(vnode_t vp, struct nfslockfile *lfp, 186 struct nfsclient *clp, int *haslockp, NFSPROC_T *p); 187 static int nfsrv_notsamecredname(struct nfsrv_descript *nd, 188 struct nfsclient *clp); 189 static time_t nfsrv_leaseexpiry(void); 190 static void nfsrv_delaydelegtimeout(struct nfsstate *stp); 191 static int nfsrv_checkseqid(struct nfsrv_descript *nd, u_int32_t seqid, 192 struct nfsstate *stp, struct nfsrvcache *op); 193 static int nfsrv_nootherstate(struct nfsstate *stp); 194 static int nfsrv_locallock(vnode_t vp, struct nfslockfile *lfp, int flags, 195 uint64_t first, uint64_t end, struct nfslockconflict *cfp, NFSPROC_T *p); 196 static void nfsrv_localunlock(vnode_t vp, struct nfslockfile *lfp, 197 uint64_t init_first, uint64_t init_end, NFSPROC_T *p); 198 static int nfsrv_dolocal(vnode_t vp, struct nfslockfile *lfp, int flags, 199 int oldflags, uint64_t first, uint64_t end, struct nfslockconflict *cfp, 200 NFSPROC_T *p); 201 static void nfsrv_locallock_rollback(vnode_t vp, struct nfslockfile *lfp, 202 NFSPROC_T *p); 203 static void nfsrv_locallock_commit(struct nfslockfile *lfp, int flags, 204 uint64_t first, uint64_t end); 205 static void nfsrv_locklf(struct nfslockfile *lfp); 206 static void nfsrv_unlocklf(struct nfslockfile *lfp); 207 static struct nfsdsession *nfsrv_findsession(uint8_t *sessionid); 208 static int nfsrv_freesession(struct nfsdsession *sep, uint8_t *sessionid); 209 static int nfsv4_setcbsequence(struct nfsrv_descript *nd, struct nfsclient *clp, 210 int dont_replycache, struct nfsdsession **sepp, int *slotposp); 211 static int nfsv4_getcbsession(struct nfsclient *clp, struct nfsdsession **sepp); 212 static int nfsrv_addlayout(struct nfsrv_descript *nd, struct nfslayout **lypp, 213 nfsv4stateid_t *stateidp, char *layp, int *layoutlenp, NFSPROC_T *p); 214 static void nfsrv_freelayout(struct nfslayouthead *lhp, struct nfslayout *lyp); 215 static void nfsrv_freelayoutlist(nfsquad_t clientid); 216 static void nfsrv_freelayouts(nfsquad_t *clid, fsid_t *fs, int laytype, 217 int iomode); 218 static void nfsrv_freealllayouts(void); 219 static void nfsrv_freedevid(struct nfsdevice *ds); 220 static int nfsrv_setdsserver(char *dspathp, char *mdspathp, NFSPROC_T *p, 221 struct nfsdevice **dsp); 222 static void nfsrv_deleteds(struct nfsdevice *fndds); 223 static void nfsrv_allocdevid(struct nfsdevice *ds, char *addr, char *dnshost); 224 static void nfsrv_freealldevids(void); 225 static void nfsrv_flexlayouterr(struct nfsrv_descript *nd, uint32_t *layp, 226 int maxcnt, NFSPROC_T *p); 227 static int nfsrv_recalllayout(nfsquad_t clid, nfsv4stateid_t *stateidp, 228 fhandle_t *fhp, struct nfslayout *lyp, int changed, int laytype, 229 NFSPROC_T *p); 230 static int nfsrv_findlayout(nfsquad_t *clientidp, fhandle_t *fhp, int laytype, 231 NFSPROC_T *, struct nfslayout **lypp); 232 static int nfsrv_fndclid(nfsquad_t *clidvec, nfsquad_t clid, int clidcnt); 233 static struct nfslayout *nfsrv_filelayout(struct nfsrv_descript *nd, int iomode, 234 fhandle_t *fhp, fhandle_t *dsfhp, char *devid, fsid_t fs); 235 static struct nfslayout *nfsrv_flexlayout(struct nfsrv_descript *nd, int iomode, 236 int mirrorcnt, fhandle_t *fhp, fhandle_t *dsfhp, char *devid, fsid_t fs); 237 static int nfsrv_dontlayout(fhandle_t *fhp); 238 static int nfsrv_createdsfile(vnode_t vp, fhandle_t *fhp, struct pnfsdsfile *pf, 239 vnode_t dvp, struct nfsdevice *ds, struct ucred *cred, NFSPROC_T *p, 240 vnode_t *tvpp); 241 static struct nfsdevice *nfsrv_findmirroredds(struct nfsmount *nmp); 242 243 /* 244 * Scan the client list for a match and either return the current one, 245 * create a new entry or return an error. 246 * If returning a non-error, the clp structure must either be linked into 247 * the client list or free'd. 248 */ 249 int 250 nfsrv_setclient(struct nfsrv_descript *nd, struct nfsclient **new_clpp, 251 nfsquad_t *clientidp, nfsquad_t *confirmp, NFSPROC_T *p) 252 { 253 struct nfsclient *clp = NULL, *new_clp = *new_clpp; 254 int i, error = 0, ret; 255 struct nfsstate *stp, *tstp; 256 #ifdef INET 257 struct sockaddr_in *sin, *rin; 258 #endif 259 #ifdef INET6 260 struct sockaddr_in6 *sin6, *rin6; 261 #endif 262 struct nfsdsession *sep, *nsep; 263 int zapit = 0, gotit, hasstate = 0, igotlock; 264 static u_int64_t confirm_index = 0; 265 266 /* 267 * Check for state resource limit exceeded. 268 */ 269 if (nfsrv_openpluslock > nfsrv_v4statelimit) { 270 error = NFSERR_RESOURCE; 271 goto out; 272 } 273 274 if (nfsrv_issuedelegs == 0 || 275 ((nd->nd_flag & ND_GSS) != 0 && nfsrv_nogsscallback != 0)) 276 /* 277 * Don't do callbacks when delegations are disabled or 278 * for AUTH_GSS unless enabled via nfsrv_nogsscallback. 279 * If establishing a callback connection is attempted 280 * when a firewall is blocking the callback path, the 281 * server may wait too long for the connect attempt to 282 * succeed during the Open. Some clients, such as Linux, 283 * may timeout and give up on the Open before the server 284 * replies. Also, since AUTH_GSS callbacks are not 285 * yet interoperability tested, they might cause the 286 * server to crap out, if they get past the Init call to 287 * the client. 288 */ 289 new_clp->lc_program = 0; 290 291 /* Lock out other nfsd threads */ 292 NFSLOCKV4ROOTMUTEX(); 293 nfsv4_relref(&nfsv4rootfs_lock); 294 do { 295 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 296 NFSV4ROOTLOCKMUTEXPTR, NULL); 297 } while (!igotlock); 298 NFSUNLOCKV4ROOTMUTEX(); 299 300 /* 301 * Search for a match in the client list. 302 */ 303 gotit = i = 0; 304 while (i < nfsrv_clienthashsize && !gotit) { 305 LIST_FOREACH(clp, &NFSD_VNET(nfsclienthash)[i], lc_hash) { 306 if (new_clp->lc_idlen == clp->lc_idlen && 307 !NFSBCMP(new_clp->lc_id, clp->lc_id, clp->lc_idlen)) { 308 gotit = 1; 309 break; 310 } 311 } 312 if (gotit == 0) 313 i++; 314 } 315 if (!gotit || 316 (clp->lc_flags & (LCL_NEEDSCONFIRM | LCL_ADMINREVOKED))) { 317 if ((nd->nd_flag & ND_NFSV41) != 0 && confirmp->lval[1] != 0) { 318 /* 319 * For NFSv4.1, if confirmp->lval[1] is non-zero, the 320 * client is trying to update a confirmed clientid. 321 */ 322 NFSLOCKV4ROOTMUTEX(); 323 nfsv4_unlock(&nfsv4rootfs_lock, 1); 324 NFSUNLOCKV4ROOTMUTEX(); 325 confirmp->lval[1] = 0; 326 error = NFSERR_NOENT; 327 goto out; 328 } 329 /* 330 * Get rid of the old one. 331 */ 332 if (i != nfsrv_clienthashsize) { 333 LIST_REMOVE(clp, lc_hash); 334 nfsrv_cleanclient(clp, p); 335 nfsrv_freedeleglist(&clp->lc_deleg); 336 nfsrv_freedeleglist(&clp->lc_olddeleg); 337 zapit = 1; 338 } 339 /* 340 * Add it after assigning a client id to it. 341 */ 342 new_clp->lc_flags |= LCL_NEEDSCONFIRM; 343 if ((nd->nd_flag & ND_NFSV41) != 0) { 344 confirmp->lval[0] = ++confirm_index; 345 new_clp->lc_confirm.lval[0] = confirmp->lval[0] - 1; 346 } else 347 confirmp->qval = new_clp->lc_confirm.qval = 348 ++confirm_index; 349 clientidp->lval[0] = new_clp->lc_clientid.lval[0] = 350 NFSD_VNET(nfsrvboottime); 351 clientidp->lval[1] = new_clp->lc_clientid.lval[1] = 352 nfsrv_nextclientindex(); 353 new_clp->lc_stateindex = 0; 354 new_clp->lc_statemaxindex = 0; 355 new_clp->lc_prevsess = 0; 356 new_clp->lc_cbref = 0; 357 new_clp->lc_expiry = nfsrv_leaseexpiry(); 358 LIST_INIT(&new_clp->lc_open); 359 LIST_INIT(&new_clp->lc_deleg); 360 LIST_INIT(&new_clp->lc_olddeleg); 361 LIST_INIT(&new_clp->lc_session); 362 for (i = 0; i < nfsrv_statehashsize; i++) 363 LIST_INIT(&new_clp->lc_stateid[i]); 364 LIST_INSERT_HEAD(NFSCLIENTHASH(new_clp->lc_clientid), new_clp, 365 lc_hash); 366 NFSD_VNET(nfsstatsv1_p)->srvclients++; 367 nfsrv_openpluslock++; 368 nfsrv_clients++; 369 NFSLOCKV4ROOTMUTEX(); 370 nfsv4_unlock(&nfsv4rootfs_lock, 1); 371 NFSUNLOCKV4ROOTMUTEX(); 372 if (zapit) 373 nfsrv_zapclient(clp, p); 374 *new_clpp = NULL; 375 goto out; 376 } 377 378 /* 379 * Now, handle the cases where the id is already issued. 380 */ 381 if (nfsrv_notsamecredname(nd, clp)) { 382 /* 383 * Check to see if there is expired state that should go away. 384 */ 385 if (clp->lc_expiry < NFSD_MONOSEC && 386 (!LIST_EMPTY(&clp->lc_open) || !LIST_EMPTY(&clp->lc_deleg))) { 387 nfsrv_cleanclient(clp, p); 388 nfsrv_freedeleglist(&clp->lc_deleg); 389 } 390 391 /* 392 * If there is outstanding state, then reply NFSERR_CLIDINUSE per 393 * RFC3530 Sec. 8.1.2 last para. 394 */ 395 if (!LIST_EMPTY(&clp->lc_deleg)) { 396 hasstate = 1; 397 } else if (LIST_EMPTY(&clp->lc_open)) { 398 hasstate = 0; 399 } else { 400 hasstate = 0; 401 /* Look for an Open on the OpenOwner */ 402 LIST_FOREACH(stp, &clp->lc_open, ls_list) { 403 if (!LIST_EMPTY(&stp->ls_open)) { 404 hasstate = 1; 405 break; 406 } 407 } 408 } 409 if (hasstate) { 410 /* 411 * If the uid doesn't match, return NFSERR_CLIDINUSE after 412 * filling out the correct ipaddr and portnum. 413 */ 414 switch (clp->lc_req.nr_nam->sa_family) { 415 #ifdef INET 416 case AF_INET: 417 sin = (struct sockaddr_in *)new_clp->lc_req.nr_nam; 418 rin = (struct sockaddr_in *)clp->lc_req.nr_nam; 419 sin->sin_addr.s_addr = rin->sin_addr.s_addr; 420 sin->sin_port = rin->sin_port; 421 break; 422 #endif 423 #ifdef INET6 424 case AF_INET6: 425 sin6 = (struct sockaddr_in6 *)new_clp->lc_req.nr_nam; 426 rin6 = (struct sockaddr_in6 *)clp->lc_req.nr_nam; 427 sin6->sin6_addr = rin6->sin6_addr; 428 sin6->sin6_port = rin6->sin6_port; 429 break; 430 #endif 431 } 432 NFSLOCKV4ROOTMUTEX(); 433 nfsv4_unlock(&nfsv4rootfs_lock, 1); 434 NFSUNLOCKV4ROOTMUTEX(); 435 error = NFSERR_CLIDINUSE; 436 goto out; 437 } 438 } 439 440 if (NFSBCMP(new_clp->lc_verf, clp->lc_verf, NFSX_VERF)) { 441 /* 442 * If the verifier has changed, the client has rebooted 443 * and a new client id is issued. The old state info 444 * can be thrown away once the SETCLIENTID_CONFIRM occurs. 445 */ 446 LIST_REMOVE(clp, lc_hash); 447 448 /* Get rid of all sessions on this clientid. */ 449 LIST_FOREACH_SAFE(sep, &clp->lc_session, sess_list, nsep) { 450 ret = nfsrv_freesession(sep, NULL); 451 if (ret != 0) 452 printf("nfsrv_setclient: verifier changed free" 453 " session failed=%d\n", ret); 454 } 455 456 new_clp->lc_flags |= LCL_NEEDSCONFIRM; 457 if ((nd->nd_flag & ND_NFSV41) != 0) { 458 confirmp->lval[0] = ++confirm_index; 459 new_clp->lc_confirm.lval[0] = confirmp->lval[0] - 1; 460 } else 461 confirmp->qval = new_clp->lc_confirm.qval = 462 ++confirm_index; 463 clientidp->lval[0] = new_clp->lc_clientid.lval[0] = 464 NFSD_VNET(nfsrvboottime); 465 clientidp->lval[1] = new_clp->lc_clientid.lval[1] = 466 nfsrv_nextclientindex(); 467 new_clp->lc_stateindex = 0; 468 new_clp->lc_statemaxindex = 0; 469 new_clp->lc_prevsess = 0; 470 new_clp->lc_cbref = 0; 471 new_clp->lc_expiry = nfsrv_leaseexpiry(); 472 473 /* 474 * Save the state until confirmed. 475 */ 476 LIST_NEWHEAD(&new_clp->lc_open, &clp->lc_open, ls_list); 477 LIST_FOREACH(tstp, &new_clp->lc_open, ls_list) 478 tstp->ls_clp = new_clp; 479 LIST_NEWHEAD(&new_clp->lc_deleg, &clp->lc_deleg, ls_list); 480 LIST_FOREACH(tstp, &new_clp->lc_deleg, ls_list) 481 tstp->ls_clp = new_clp; 482 LIST_NEWHEAD(&new_clp->lc_olddeleg, &clp->lc_olddeleg, 483 ls_list); 484 LIST_FOREACH(tstp, &new_clp->lc_olddeleg, ls_list) 485 tstp->ls_clp = new_clp; 486 for (i = 0; i < nfsrv_statehashsize; i++) { 487 LIST_NEWHEAD(&new_clp->lc_stateid[i], 488 &clp->lc_stateid[i], ls_hash); 489 LIST_FOREACH(tstp, &new_clp->lc_stateid[i], ls_hash) 490 tstp->ls_clp = new_clp; 491 } 492 LIST_INIT(&new_clp->lc_session); 493 LIST_INSERT_HEAD(NFSCLIENTHASH(new_clp->lc_clientid), new_clp, 494 lc_hash); 495 NFSD_VNET(nfsstatsv1_p)->srvclients++; 496 nfsrv_openpluslock++; 497 nfsrv_clients++; 498 NFSLOCKV4ROOTMUTEX(); 499 nfsv4_unlock(&nfsv4rootfs_lock, 1); 500 NFSUNLOCKV4ROOTMUTEX(); 501 502 /* 503 * Must wait until any outstanding callback on the old clp 504 * completes. 505 */ 506 NFSLOCKSTATE(); 507 while (clp->lc_cbref) { 508 clp->lc_flags |= LCL_WAKEUPWANTED; 509 (void)mtx_sleep(clp, NFSSTATEMUTEXPTR, PZERO - 1, 510 "nfsd clp", 10 * hz); 511 } 512 NFSUNLOCKSTATE(); 513 nfsrv_zapclient(clp, p); 514 *new_clpp = NULL; 515 goto out; 516 } 517 518 /* For NFSv4.1, mark that we found a confirmed clientid. */ 519 if ((nd->nd_flag & ND_NFSV41) != 0) { 520 clientidp->lval[0] = clp->lc_clientid.lval[0]; 521 clientidp->lval[1] = clp->lc_clientid.lval[1]; 522 confirmp->lval[0] = 0; /* Ignored by client */ 523 confirmp->lval[1] = 1; 524 } else { 525 /* 526 * id and verifier match, so update the net address info 527 * and get rid of any existing callback authentication 528 * handle, so a new one will be acquired. 529 */ 530 LIST_REMOVE(clp, lc_hash); 531 new_clp->lc_flags |= (LCL_NEEDSCONFIRM | LCL_DONTCLEAN); 532 new_clp->lc_expiry = nfsrv_leaseexpiry(); 533 confirmp->qval = new_clp->lc_confirm.qval = ++confirm_index; 534 clientidp->lval[0] = new_clp->lc_clientid.lval[0] = 535 clp->lc_clientid.lval[0]; 536 clientidp->lval[1] = new_clp->lc_clientid.lval[1] = 537 clp->lc_clientid.lval[1]; 538 new_clp->lc_delegtime = clp->lc_delegtime; 539 new_clp->lc_stateindex = clp->lc_stateindex; 540 new_clp->lc_statemaxindex = clp->lc_statemaxindex; 541 new_clp->lc_cbref = 0; 542 LIST_NEWHEAD(&new_clp->lc_open, &clp->lc_open, ls_list); 543 LIST_FOREACH(tstp, &new_clp->lc_open, ls_list) 544 tstp->ls_clp = new_clp; 545 LIST_NEWHEAD(&new_clp->lc_deleg, &clp->lc_deleg, ls_list); 546 LIST_FOREACH(tstp, &new_clp->lc_deleg, ls_list) 547 tstp->ls_clp = new_clp; 548 LIST_NEWHEAD(&new_clp->lc_olddeleg, &clp->lc_olddeleg, ls_list); 549 LIST_FOREACH(tstp, &new_clp->lc_olddeleg, ls_list) 550 tstp->ls_clp = new_clp; 551 for (i = 0; i < nfsrv_statehashsize; i++) { 552 LIST_NEWHEAD(&new_clp->lc_stateid[i], 553 &clp->lc_stateid[i], ls_hash); 554 LIST_FOREACH(tstp, &new_clp->lc_stateid[i], ls_hash) 555 tstp->ls_clp = new_clp; 556 } 557 LIST_INIT(&new_clp->lc_session); 558 LIST_INSERT_HEAD(NFSCLIENTHASH(new_clp->lc_clientid), new_clp, 559 lc_hash); 560 NFSD_VNET(nfsstatsv1_p)->srvclients++; 561 nfsrv_openpluslock++; 562 nfsrv_clients++; 563 } 564 NFSLOCKV4ROOTMUTEX(); 565 nfsv4_unlock(&nfsv4rootfs_lock, 1); 566 NFSUNLOCKV4ROOTMUTEX(); 567 568 if ((nd->nd_flag & ND_NFSV41) == 0) { 569 /* 570 * Must wait until any outstanding callback on the old clp 571 * completes. 572 */ 573 NFSLOCKSTATE(); 574 while (clp->lc_cbref) { 575 clp->lc_flags |= LCL_WAKEUPWANTED; 576 (void)mtx_sleep(clp, NFSSTATEMUTEXPTR, PZERO - 1, 577 "nfsdclp", 10 * hz); 578 } 579 NFSUNLOCKSTATE(); 580 nfsrv_zapclient(clp, p); 581 *new_clpp = NULL; 582 } 583 584 out: 585 NFSEXITCODE2(error, nd); 586 return (error); 587 } 588 589 /* 590 * Check to see if the client id exists and optionally confirm it. 591 */ 592 int 593 nfsrv_getclient(nfsquad_t clientid, int opflags, struct nfsclient **clpp, 594 struct nfsdsession *nsep, nfsquad_t confirm, uint32_t cbprogram, 595 struct nfsrv_descript *nd, NFSPROC_T *p) 596 { 597 struct nfsclient *clp; 598 struct nfsstate *stp; 599 int i; 600 struct nfsclienthashhead *hp; 601 int error = 0, igotlock, doneok; 602 struct nfssessionhash *shp; 603 struct nfsdsession *sep; 604 uint64_t sessid[2]; 605 bool sess_replay; 606 static uint64_t next_sess = 0; 607 608 if (clpp) 609 *clpp = NULL; 610 if ((nd == NULL || (nd->nd_flag & ND_NFSV41) == 0 || 611 opflags != CLOPS_RENEW) && NFSD_VNET(nfsrvboottime) != 612 clientid.lval[0]) { 613 error = NFSERR_STALECLIENTID; 614 goto out; 615 } 616 617 /* 618 * If called with opflags == CLOPS_RENEW, the State Lock is 619 * already held. Otherwise, we need to get either that or, 620 * for the case of Confirm, lock out the nfsd threads. 621 */ 622 if (opflags & CLOPS_CONFIRM) { 623 NFSLOCKV4ROOTMUTEX(); 624 nfsv4_relref(&nfsv4rootfs_lock); 625 do { 626 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 627 NFSV4ROOTLOCKMUTEXPTR, NULL); 628 } while (!igotlock); 629 /* 630 * Create a new sessionid here, since we need to do it where 631 * there is a mutex held to serialize update of next_sess. 632 */ 633 if ((nd->nd_flag & ND_NFSV41) != 0) { 634 sessid[0] = ++next_sess; 635 sessid[1] = clientid.qval; 636 } 637 NFSUNLOCKV4ROOTMUTEX(); 638 } else if (opflags != CLOPS_RENEW) { 639 NFSLOCKSTATE(); 640 } 641 642 /* For NFSv4.1, the clp is acquired from the associated session. */ 643 if (nd != NULL && (nd->nd_flag & ND_NFSV41) != 0 && 644 opflags == CLOPS_RENEW) { 645 clp = NULL; 646 if ((nd->nd_flag & ND_HASSEQUENCE) != 0) { 647 shp = NFSSESSIONHASH(nd->nd_sessionid); 648 NFSLOCKSESSION(shp); 649 sep = nfsrv_findsession(nd->nd_sessionid); 650 if (sep != NULL) 651 clp = sep->sess_clp; 652 NFSUNLOCKSESSION(shp); 653 } 654 } else { 655 hp = NFSCLIENTHASH(clientid); 656 LIST_FOREACH(clp, hp, lc_hash) { 657 if (clp->lc_clientid.lval[1] == clientid.lval[1]) 658 break; 659 } 660 } 661 if (clp == NULL) { 662 if (opflags & CLOPS_CONFIRM) 663 error = NFSERR_STALECLIENTID; 664 else 665 error = NFSERR_EXPIRED; 666 } else if (clp->lc_flags & LCL_ADMINREVOKED) { 667 /* 668 * If marked admin revoked, just return the error. 669 */ 670 error = NFSERR_ADMINREVOKED; 671 } 672 if (error) { 673 if (opflags & CLOPS_CONFIRM) { 674 NFSLOCKV4ROOTMUTEX(); 675 nfsv4_unlock(&nfsv4rootfs_lock, 1); 676 NFSUNLOCKV4ROOTMUTEX(); 677 } else if (opflags != CLOPS_RENEW) { 678 NFSUNLOCKSTATE(); 679 } 680 goto out; 681 } 682 683 /* 684 * Perform any operations specified by the opflags. 685 */ 686 if (opflags & CLOPS_CONFIRM) { 687 sess_replay = false; 688 if ((nd->nd_flag & ND_NFSV41) != 0) { 689 /* 690 * For the case where lc_confirm.lval[0] == confirm.lval[0], 691 * use the new session, but with the previous sessionid. 692 * This is not exactly what the RFC describes, but should 693 * result in the same reply as the previous CreateSession. 694 */ 695 if (clp->lc_confirm.lval[0] + 1 == confirm.lval[0]) { 696 clp->lc_confirm.lval[0] = confirm.lval[0]; 697 clp->lc_prevsess = sessid[0]; 698 } else if (clp->lc_confirm.lval[0] == confirm.lval[0]) { 699 if (clp->lc_prevsess == 0) 700 error = NFSERR_SEQMISORDERED; 701 else 702 sessid[0] = clp->lc_prevsess; 703 sess_replay = true; 704 } else 705 error = NFSERR_SEQMISORDERED; 706 } else if ((nd->nd_flag & ND_NFSV41) == 0 && 707 clp->lc_confirm.qval != confirm.qval) 708 error = NFSERR_STALECLIENTID; 709 if (error == 0 && nfsrv_notsamecredname(nd, clp)) 710 error = NFSERR_CLIDINUSE; 711 712 if (!error) { 713 if ((clp->lc_flags & (LCL_NEEDSCONFIRM | LCL_DONTCLEAN)) == 714 LCL_NEEDSCONFIRM) { 715 /* 716 * Hang onto the delegations (as old delegations) 717 * for an Open with CLAIM_DELEGATE_PREV unless in 718 * grace, but get rid of the rest of the state. 719 */ 720 nfsrv_cleanclient(clp, p); 721 nfsrv_freedeleglist(&clp->lc_olddeleg); 722 if (nfsrv_checkgrace(nd, clp, 0)) { 723 /* In grace, so just delete delegations */ 724 nfsrv_freedeleglist(&clp->lc_deleg); 725 } else { 726 LIST_FOREACH(stp, &clp->lc_deleg, ls_list) 727 stp->ls_flags |= NFSLCK_OLDDELEG; 728 clp->lc_delegtime = NFSD_MONOSEC + 729 nfsrv_lease + NFSRV_LEASEDELTA; 730 LIST_NEWHEAD(&clp->lc_olddeleg, &clp->lc_deleg, 731 ls_list); 732 } 733 if ((nd->nd_flag & ND_NFSV41) != 0) 734 clp->lc_program = cbprogram; 735 } 736 clp->lc_flags &= ~(LCL_NEEDSCONFIRM | LCL_DONTCLEAN); 737 if (clp->lc_program) 738 clp->lc_flags |= LCL_NEEDSCBNULL; 739 /* For NFSv4.1, link the session onto the client. */ 740 if (nsep != NULL) { 741 /* Hold a reference on the xprt for a backchannel. */ 742 if ((nsep->sess_crflags & NFSV4CRSESS_CONNBACKCHAN) 743 != 0 && !sess_replay) { 744 if (clp->lc_req.nr_client == NULL) 745 clp->lc_req.nr_client = (struct __rpc_client *) 746 clnt_bck_create(nd->nd_xprt->xp_socket, 747 cbprogram, NFSV4_CBVERS); 748 if (clp->lc_req.nr_client != NULL) { 749 SVC_ACQUIRE(nd->nd_xprt); 750 CLNT_ACQUIRE(clp->lc_req.nr_client); 751 nd->nd_xprt->xp_p2 = clp->lc_req.nr_client; 752 /* Disable idle timeout. */ 753 nd->nd_xprt->xp_idletimeout = 0; 754 nsep->sess_cbsess.nfsess_xprt = nd->nd_xprt; 755 } else 756 nsep->sess_crflags &= ~NFSV4CRSESS_CONNBACKCHAN; 757 } 758 NFSBCOPY(sessid, nsep->sess_sessionid, 759 NFSX_V4SESSIONID); 760 NFSBCOPY(sessid, nsep->sess_cbsess.nfsess_sessionid, 761 NFSX_V4SESSIONID); 762 if (!sess_replay) { 763 shp = NFSSESSIONHASH(nsep->sess_sessionid); 764 NFSLOCKSTATE(); 765 NFSLOCKSESSION(shp); 766 LIST_INSERT_HEAD(&shp->list, nsep, sess_hash); 767 LIST_INSERT_HEAD(&clp->lc_session, nsep, sess_list); 768 nsep->sess_clp = clp; 769 NFSUNLOCKSESSION(shp); 770 NFSUNLOCKSTATE(); 771 } 772 } 773 } 774 } else if (clp->lc_flags & LCL_NEEDSCONFIRM) { 775 error = NFSERR_EXPIRED; 776 } 777 778 /* 779 * If called by the Renew Op, we must check the principal. 780 */ 781 if (!error && (opflags & CLOPS_RENEWOP)) { 782 if (nfsrv_notsamecredname(nd, clp)) { 783 doneok = 0; 784 for (i = 0; i < nfsrv_statehashsize && doneok == 0; i++) { 785 LIST_FOREACH(stp, &clp->lc_stateid[i], ls_hash) { 786 if ((stp->ls_flags & NFSLCK_OPEN) && 787 stp->ls_uid == nd->nd_cred->cr_uid) { 788 doneok = 1; 789 break; 790 } 791 } 792 } 793 if (!doneok) 794 error = NFSERR_ACCES; 795 } 796 if (!error && (clp->lc_flags & LCL_CBDOWN)) 797 error = NFSERR_CBPATHDOWN; 798 } 799 if ((!error || error == NFSERR_CBPATHDOWN) && 800 (opflags & CLOPS_RENEW)) { 801 clp->lc_expiry = nfsrv_leaseexpiry(); 802 } 803 if (opflags & CLOPS_CONFIRM) { 804 NFSLOCKV4ROOTMUTEX(); 805 nfsv4_unlock(&nfsv4rootfs_lock, 1); 806 NFSUNLOCKV4ROOTMUTEX(); 807 } else if (opflags != CLOPS_RENEW) { 808 NFSUNLOCKSTATE(); 809 } 810 if (clpp) 811 *clpp = clp; 812 813 out: 814 NFSEXITCODE2(error, nd); 815 return (error); 816 } 817 818 /* 819 * Perform the NFSv4.1 destroy clientid. 820 */ 821 int 822 nfsrv_destroyclient(nfsquad_t clientid, NFSPROC_T *p) 823 { 824 struct nfsclient *clp; 825 struct nfsclienthashhead *hp; 826 int error = 0, i, igotlock; 827 828 if (NFSD_VNET(nfsrvboottime) != clientid.lval[0]) { 829 error = NFSERR_STALECLIENTID; 830 goto out; 831 } 832 833 /* Lock out other nfsd threads */ 834 NFSLOCKV4ROOTMUTEX(); 835 nfsv4_relref(&nfsv4rootfs_lock); 836 do { 837 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 838 NFSV4ROOTLOCKMUTEXPTR, NULL); 839 } while (igotlock == 0); 840 NFSUNLOCKV4ROOTMUTEX(); 841 842 hp = NFSCLIENTHASH(clientid); 843 LIST_FOREACH(clp, hp, lc_hash) { 844 if (clp->lc_clientid.lval[1] == clientid.lval[1]) 845 break; 846 } 847 if (clp == NULL) { 848 NFSLOCKV4ROOTMUTEX(); 849 nfsv4_unlock(&nfsv4rootfs_lock, 1); 850 NFSUNLOCKV4ROOTMUTEX(); 851 /* Just return ok, since it is gone. */ 852 goto out; 853 } 854 855 /* 856 * Free up all layouts on the clientid. Should the client return the 857 * layouts? 858 */ 859 nfsrv_freelayoutlist(clientid); 860 861 /* Scan for state on the clientid. */ 862 for (i = 0; i < nfsrv_statehashsize; i++) 863 if (!LIST_EMPTY(&clp->lc_stateid[i])) { 864 NFSLOCKV4ROOTMUTEX(); 865 nfsv4_unlock(&nfsv4rootfs_lock, 1); 866 NFSUNLOCKV4ROOTMUTEX(); 867 error = NFSERR_CLIENTIDBUSY; 868 goto out; 869 } 870 if (!LIST_EMPTY(&clp->lc_session) || !LIST_EMPTY(&clp->lc_deleg)) { 871 NFSLOCKV4ROOTMUTEX(); 872 nfsv4_unlock(&nfsv4rootfs_lock, 1); 873 NFSUNLOCKV4ROOTMUTEX(); 874 error = NFSERR_CLIENTIDBUSY; 875 goto out; 876 } 877 878 /* Destroy the clientid and return ok. */ 879 nfsrv_cleanclient(clp, p); 880 nfsrv_freedeleglist(&clp->lc_deleg); 881 nfsrv_freedeleglist(&clp->lc_olddeleg); 882 LIST_REMOVE(clp, lc_hash); 883 NFSLOCKV4ROOTMUTEX(); 884 nfsv4_unlock(&nfsv4rootfs_lock, 1); 885 NFSUNLOCKV4ROOTMUTEX(); 886 nfsrv_zapclient(clp, p); 887 out: 888 NFSEXITCODE2(error, nd); 889 return (error); 890 } 891 892 /* 893 * Called from the new nfssvc syscall to admin revoke a clientid. 894 * Returns 0 for success, error otherwise. 895 */ 896 int 897 nfsrv_adminrevoke(struct nfsd_clid *revokep, NFSPROC_T *p) 898 { 899 struct nfsclient *clp = NULL; 900 int i, error = 0; 901 int gotit, igotlock; 902 903 /* 904 * First, lock out the nfsd so that state won't change while the 905 * revocation record is being written to the stable storage restart 906 * file. 907 */ 908 NFSLOCKV4ROOTMUTEX(); 909 do { 910 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 911 NFSV4ROOTLOCKMUTEXPTR, NULL); 912 } while (!igotlock); 913 NFSUNLOCKV4ROOTMUTEX(); 914 915 /* 916 * Search for a match in the client list. 917 */ 918 gotit = i = 0; 919 while (i < nfsrv_clienthashsize && !gotit) { 920 LIST_FOREACH(clp, &NFSD_VNET(nfsclienthash)[i], lc_hash) { 921 if (revokep->nclid_idlen == clp->lc_idlen && 922 !NFSBCMP(revokep->nclid_id, clp->lc_id, clp->lc_idlen)) { 923 gotit = 1; 924 break; 925 } 926 } 927 i++; 928 } 929 if (!gotit) { 930 NFSLOCKV4ROOTMUTEX(); 931 nfsv4_unlock(&nfsv4rootfs_lock, 0); 932 NFSUNLOCKV4ROOTMUTEX(); 933 error = EPERM; 934 goto out; 935 } 936 937 /* 938 * Now, write out the revocation record 939 */ 940 nfsrv_writestable(clp->lc_id, clp->lc_idlen, NFSNST_REVOKE, p); 941 nfsrv_backupstable(); 942 943 /* 944 * and clear out the state, marking the clientid revoked. 945 */ 946 clp->lc_flags &= ~LCL_CALLBACKSON; 947 clp->lc_flags |= LCL_ADMINREVOKED; 948 nfsrv_cleanclient(clp, p); 949 nfsrv_freedeleglist(&clp->lc_deleg); 950 nfsrv_freedeleglist(&clp->lc_olddeleg); 951 NFSLOCKV4ROOTMUTEX(); 952 nfsv4_unlock(&nfsv4rootfs_lock, 0); 953 NFSUNLOCKV4ROOTMUTEX(); 954 955 out: 956 NFSEXITCODE(error); 957 return (error); 958 } 959 960 /* 961 * Dump out stats for all clients. Called from nfssvc(2), that is used 962 * nfsstatsv1. 963 */ 964 void 965 nfsrv_dumpclients(struct nfsd_dumpclients *dumpp, int maxcnt) 966 { 967 struct nfsclient *clp; 968 int i = 0, cnt = 0; 969 970 /* 971 * First, get a reference on the nfsv4rootfs_lock so that an 972 * exclusive lock cannot be acquired while dumping the clients. 973 */ 974 NFSLOCKV4ROOTMUTEX(); 975 nfsv4_getref(&nfsv4rootfs_lock, NULL, NFSV4ROOTLOCKMUTEXPTR, NULL); 976 NFSUNLOCKV4ROOTMUTEX(); 977 NFSLOCKSTATE(); 978 /* 979 * Rattle through the client lists until done. 980 */ 981 while (i < nfsrv_clienthashsize && cnt < maxcnt) { 982 clp = LIST_FIRST(&NFSD_VNET(nfsclienthash)[i]); 983 while (clp != LIST_END(&NFSD_VNET(nfsclienthash)[i]) && cnt < 984 maxcnt) { 985 nfsrv_dumpaclient(clp, &dumpp[cnt]); 986 cnt++; 987 clp = LIST_NEXT(clp, lc_hash); 988 } 989 i++; 990 } 991 if (cnt < maxcnt) 992 dumpp[cnt].ndcl_clid.nclid_idlen = 0; 993 NFSUNLOCKSTATE(); 994 NFSLOCKV4ROOTMUTEX(); 995 nfsv4_relref(&nfsv4rootfs_lock); 996 NFSUNLOCKV4ROOTMUTEX(); 997 } 998 999 /* 1000 * Dump stats for a client. Must be called with the NFSSTATELOCK and spl'd. 1001 */ 1002 static void 1003 nfsrv_dumpaclient(struct nfsclient *clp, struct nfsd_dumpclients *dumpp) 1004 { 1005 struct nfsstate *stp, *openstp, *lckownstp; 1006 struct nfslock *lop; 1007 sa_family_t af; 1008 #ifdef INET 1009 struct sockaddr_in *rin; 1010 #endif 1011 #ifdef INET6 1012 struct sockaddr_in6 *rin6; 1013 #endif 1014 1015 dumpp->ndcl_nopenowners = dumpp->ndcl_nlockowners = 0; 1016 dumpp->ndcl_nopens = dumpp->ndcl_nlocks = 0; 1017 dumpp->ndcl_ndelegs = dumpp->ndcl_nolddelegs = 0; 1018 dumpp->ndcl_flags = clp->lc_flags; 1019 dumpp->ndcl_clid.nclid_idlen = clp->lc_idlen; 1020 NFSBCOPY(clp->lc_id, dumpp->ndcl_clid.nclid_id, clp->lc_idlen); 1021 af = clp->lc_req.nr_nam->sa_family; 1022 dumpp->ndcl_addrfam = af; 1023 switch (af) { 1024 #ifdef INET 1025 case AF_INET: 1026 rin = (struct sockaddr_in *)clp->lc_req.nr_nam; 1027 dumpp->ndcl_cbaddr.sin_addr = rin->sin_addr; 1028 break; 1029 #endif 1030 #ifdef INET6 1031 case AF_INET6: 1032 rin6 = (struct sockaddr_in6 *)clp->lc_req.nr_nam; 1033 dumpp->ndcl_cbaddr.sin6_addr = rin6->sin6_addr; 1034 break; 1035 #endif 1036 } 1037 1038 /* 1039 * Now, scan the state lists and total up the opens and locks. 1040 */ 1041 LIST_FOREACH(stp, &clp->lc_open, ls_list) { 1042 dumpp->ndcl_nopenowners++; 1043 LIST_FOREACH(openstp, &stp->ls_open, ls_list) { 1044 dumpp->ndcl_nopens++; 1045 LIST_FOREACH(lckownstp, &openstp->ls_open, ls_list) { 1046 dumpp->ndcl_nlockowners++; 1047 LIST_FOREACH(lop, &lckownstp->ls_lock, lo_lckowner) { 1048 dumpp->ndcl_nlocks++; 1049 } 1050 } 1051 } 1052 } 1053 1054 /* 1055 * and the delegation lists. 1056 */ 1057 LIST_FOREACH(stp, &clp->lc_deleg, ls_list) { 1058 dumpp->ndcl_ndelegs++; 1059 } 1060 LIST_FOREACH(stp, &clp->lc_olddeleg, ls_list) { 1061 dumpp->ndcl_nolddelegs++; 1062 } 1063 } 1064 1065 /* 1066 * Dump out lock stats for a file. 1067 */ 1068 void 1069 nfsrv_dumplocks(vnode_t vp, struct nfsd_dumplocks *ldumpp, int maxcnt, 1070 NFSPROC_T *p) 1071 { 1072 struct nfsstate *stp; 1073 struct nfslock *lop; 1074 int cnt = 0; 1075 struct nfslockfile *lfp; 1076 sa_family_t af; 1077 #ifdef INET 1078 struct sockaddr_in *rin; 1079 #endif 1080 #ifdef INET6 1081 struct sockaddr_in6 *rin6; 1082 #endif 1083 int ret; 1084 fhandle_t nfh; 1085 1086 ret = nfsrv_getlockfh(vp, 0, NULL, &nfh, p); 1087 /* 1088 * First, get a reference on the nfsv4rootfs_lock so that an 1089 * exclusive lock on it cannot be acquired while dumping the locks. 1090 */ 1091 NFSLOCKV4ROOTMUTEX(); 1092 nfsv4_getref(&nfsv4rootfs_lock, NULL, NFSV4ROOTLOCKMUTEXPTR, NULL); 1093 NFSUNLOCKV4ROOTMUTEX(); 1094 NFSLOCKSTATE(); 1095 if (!ret) 1096 ret = nfsrv_getlockfile(0, NULL, &lfp, &nfh, 0); 1097 if (ret) { 1098 ldumpp[0].ndlck_clid.nclid_idlen = 0; 1099 NFSUNLOCKSTATE(); 1100 NFSLOCKV4ROOTMUTEX(); 1101 nfsv4_relref(&nfsv4rootfs_lock); 1102 NFSUNLOCKV4ROOTMUTEX(); 1103 return; 1104 } 1105 1106 /* 1107 * For each open share on file, dump it out. 1108 */ 1109 stp = LIST_FIRST(&lfp->lf_open); 1110 while (stp != LIST_END(&lfp->lf_open) && cnt < maxcnt) { 1111 ldumpp[cnt].ndlck_flags = stp->ls_flags; 1112 ldumpp[cnt].ndlck_stateid.seqid = stp->ls_stateid.seqid; 1113 ldumpp[cnt].ndlck_stateid.other[0] = stp->ls_stateid.other[0]; 1114 ldumpp[cnt].ndlck_stateid.other[1] = stp->ls_stateid.other[1]; 1115 ldumpp[cnt].ndlck_stateid.other[2] = stp->ls_stateid.other[2]; 1116 ldumpp[cnt].ndlck_owner.nclid_idlen = 1117 stp->ls_openowner->ls_ownerlen; 1118 NFSBCOPY(stp->ls_openowner->ls_owner, 1119 ldumpp[cnt].ndlck_owner.nclid_id, 1120 stp->ls_openowner->ls_ownerlen); 1121 ldumpp[cnt].ndlck_clid.nclid_idlen = stp->ls_clp->lc_idlen; 1122 NFSBCOPY(stp->ls_clp->lc_id, ldumpp[cnt].ndlck_clid.nclid_id, 1123 stp->ls_clp->lc_idlen); 1124 af = stp->ls_clp->lc_req.nr_nam->sa_family; 1125 ldumpp[cnt].ndlck_addrfam = af; 1126 switch (af) { 1127 #ifdef INET 1128 case AF_INET: 1129 rin = (struct sockaddr_in *)stp->ls_clp->lc_req.nr_nam; 1130 ldumpp[cnt].ndlck_cbaddr.sin_addr = rin->sin_addr; 1131 break; 1132 #endif 1133 #ifdef INET6 1134 case AF_INET6: 1135 rin6 = (struct sockaddr_in6 *) 1136 stp->ls_clp->lc_req.nr_nam; 1137 ldumpp[cnt].ndlck_cbaddr.sin6_addr = rin6->sin6_addr; 1138 break; 1139 #endif 1140 } 1141 stp = LIST_NEXT(stp, ls_file); 1142 cnt++; 1143 } 1144 1145 /* 1146 * and all locks. 1147 */ 1148 lop = LIST_FIRST(&lfp->lf_lock); 1149 while (lop != LIST_END(&lfp->lf_lock) && cnt < maxcnt) { 1150 stp = lop->lo_stp; 1151 ldumpp[cnt].ndlck_flags = lop->lo_flags; 1152 ldumpp[cnt].ndlck_first = lop->lo_first; 1153 ldumpp[cnt].ndlck_end = lop->lo_end; 1154 ldumpp[cnt].ndlck_stateid.seqid = stp->ls_stateid.seqid; 1155 ldumpp[cnt].ndlck_stateid.other[0] = stp->ls_stateid.other[0]; 1156 ldumpp[cnt].ndlck_stateid.other[1] = stp->ls_stateid.other[1]; 1157 ldumpp[cnt].ndlck_stateid.other[2] = stp->ls_stateid.other[2]; 1158 ldumpp[cnt].ndlck_owner.nclid_idlen = stp->ls_ownerlen; 1159 NFSBCOPY(stp->ls_owner, ldumpp[cnt].ndlck_owner.nclid_id, 1160 stp->ls_ownerlen); 1161 ldumpp[cnt].ndlck_clid.nclid_idlen = stp->ls_clp->lc_idlen; 1162 NFSBCOPY(stp->ls_clp->lc_id, ldumpp[cnt].ndlck_clid.nclid_id, 1163 stp->ls_clp->lc_idlen); 1164 af = stp->ls_clp->lc_req.nr_nam->sa_family; 1165 ldumpp[cnt].ndlck_addrfam = af; 1166 switch (af) { 1167 #ifdef INET 1168 case AF_INET: 1169 rin = (struct sockaddr_in *)stp->ls_clp->lc_req.nr_nam; 1170 ldumpp[cnt].ndlck_cbaddr.sin_addr = rin->sin_addr; 1171 break; 1172 #endif 1173 #ifdef INET6 1174 case AF_INET6: 1175 rin6 = (struct sockaddr_in6 *) 1176 stp->ls_clp->lc_req.nr_nam; 1177 ldumpp[cnt].ndlck_cbaddr.sin6_addr = rin6->sin6_addr; 1178 break; 1179 #endif 1180 } 1181 lop = LIST_NEXT(lop, lo_lckfile); 1182 cnt++; 1183 } 1184 1185 /* 1186 * and the delegations. 1187 */ 1188 stp = LIST_FIRST(&lfp->lf_deleg); 1189 while (stp != LIST_END(&lfp->lf_deleg) && cnt < maxcnt) { 1190 ldumpp[cnt].ndlck_flags = stp->ls_flags; 1191 ldumpp[cnt].ndlck_stateid.seqid = stp->ls_stateid.seqid; 1192 ldumpp[cnt].ndlck_stateid.other[0] = stp->ls_stateid.other[0]; 1193 ldumpp[cnt].ndlck_stateid.other[1] = stp->ls_stateid.other[1]; 1194 ldumpp[cnt].ndlck_stateid.other[2] = stp->ls_stateid.other[2]; 1195 ldumpp[cnt].ndlck_owner.nclid_idlen = 0; 1196 ldumpp[cnt].ndlck_clid.nclid_idlen = stp->ls_clp->lc_idlen; 1197 NFSBCOPY(stp->ls_clp->lc_id, ldumpp[cnt].ndlck_clid.nclid_id, 1198 stp->ls_clp->lc_idlen); 1199 af = stp->ls_clp->lc_req.nr_nam->sa_family; 1200 ldumpp[cnt].ndlck_addrfam = af; 1201 switch (af) { 1202 #ifdef INET 1203 case AF_INET: 1204 rin = (struct sockaddr_in *)stp->ls_clp->lc_req.nr_nam; 1205 ldumpp[cnt].ndlck_cbaddr.sin_addr = rin->sin_addr; 1206 break; 1207 #endif 1208 #ifdef INET6 1209 case AF_INET6: 1210 rin6 = (struct sockaddr_in6 *) 1211 stp->ls_clp->lc_req.nr_nam; 1212 ldumpp[cnt].ndlck_cbaddr.sin6_addr = rin6->sin6_addr; 1213 break; 1214 #endif 1215 } 1216 stp = LIST_NEXT(stp, ls_file); 1217 cnt++; 1218 } 1219 1220 /* 1221 * If list isn't full, mark end of list by setting the client name 1222 * to zero length. 1223 */ 1224 if (cnt < maxcnt) 1225 ldumpp[cnt].ndlck_clid.nclid_idlen = 0; 1226 NFSUNLOCKSTATE(); 1227 NFSLOCKV4ROOTMUTEX(); 1228 nfsv4_relref(&nfsv4rootfs_lock); 1229 NFSUNLOCKV4ROOTMUTEX(); 1230 } 1231 1232 /* 1233 * Server timer routine. It can scan any linked list, so long 1234 * as it holds the spin/mutex lock and there is no exclusive lock on 1235 * nfsv4rootfs_lock. 1236 * (For OpenBSD, a kthread is ok. For FreeBSD, I think it is ok 1237 * to do this from a callout, since the spin locks work. For 1238 * Darwin, I'm not sure what will work correctly yet.) 1239 * Should be called once per second. 1240 */ 1241 void 1242 nfsrv_servertimer(void *arg __unused) 1243 { 1244 struct nfsclient *clp, *nclp; 1245 struct nfsstate *stp, *nstp; 1246 int got_ref, i; 1247 1248 /* 1249 * Make sure nfsboottime is set. This is used by V3 as well 1250 * as V4. Note that nfsboottime is not nfsrvboottime, which is 1251 * only used by the V4 server for leases. 1252 */ 1253 if (nfsboottime.tv_sec == 0) 1254 NFSSETBOOTTIME(nfsboottime); 1255 1256 /* 1257 * If server hasn't started yet, just return. 1258 */ 1259 NFSLOCKSTATE(); 1260 if (NFSD_VNET(nfsrv_stablefirst).nsf_eograce == 0) { 1261 NFSUNLOCKSTATE(); 1262 return; 1263 } 1264 if (!(NFSD_VNET(nfsrv_stablefirst).nsf_flags & NFSNSF_UPDATEDONE)) { 1265 if (!(NFSD_VNET(nfsrv_stablefirst).nsf_flags & 1266 NFSNSF_GRACEOVER) && 1267 NFSD_MONOSEC > NFSD_VNET(nfsrv_stablefirst).nsf_eograce) 1268 NFSD_VNET(nfsrv_stablefirst).nsf_flags |= 1269 (NFSNSF_GRACEOVER | NFSNSF_NEEDLOCK); 1270 NFSUNLOCKSTATE(); 1271 return; 1272 } 1273 1274 /* 1275 * Try and get a reference count on the nfsv4rootfs_lock so that 1276 * no nfsd thread can acquire an exclusive lock on it before this 1277 * call is done. If it is already exclusively locked, just return. 1278 */ 1279 NFSLOCKV4ROOTMUTEX(); 1280 got_ref = nfsv4_getref_nonblock(&nfsv4rootfs_lock); 1281 NFSUNLOCKV4ROOTMUTEX(); 1282 if (got_ref == 0) { 1283 NFSUNLOCKSTATE(); 1284 return; 1285 } 1286 1287 /* 1288 * For each client... 1289 */ 1290 for (i = 0; i < nfsrv_clienthashsize; i++) { 1291 clp = LIST_FIRST(&NFSD_VNET(nfsclienthash)[i]); 1292 while (clp != LIST_END(&NFSD_VNET(nfsclienthash)[i])) { 1293 nclp = LIST_NEXT(clp, lc_hash); 1294 if (!(clp->lc_flags & LCL_EXPIREIT)) { 1295 if (((clp->lc_expiry + NFSRV_STALELEASE) < NFSD_MONOSEC 1296 && ((LIST_EMPTY(&clp->lc_deleg) 1297 && LIST_EMPTY(&clp->lc_open)) || 1298 nfsrv_clients > nfsrv_clienthighwater)) || 1299 (clp->lc_expiry + NFSRV_MOULDYLEASE) < NFSD_MONOSEC || 1300 (clp->lc_expiry < NFSD_MONOSEC && 1301 (nfsrv_openpluslock * 10 / 9) > nfsrv_v4statelimit)) { 1302 /* 1303 * Lease has expired several nfsrv_lease times ago: 1304 * PLUS 1305 * - no state is associated with it 1306 * OR 1307 * - above high water mark for number of clients 1308 * (nfsrv_clienthighwater should be large enough 1309 * that this only occurs when clients fail to 1310 * use the same nfs_client_id4.id. Maybe somewhat 1311 * higher that the maximum number of clients that 1312 * will mount this server?) 1313 * OR 1314 * Lease has expired a very long time ago 1315 * OR 1316 * Lease has expired PLUS the number of opens + locks 1317 * has exceeded 90% of capacity 1318 * 1319 * --> Mark for expiry. The actual expiry will be done 1320 * by an nfsd sometime soon. 1321 */ 1322 clp->lc_flags |= LCL_EXPIREIT; 1323 NFSD_VNET(nfsrv_stablefirst).nsf_flags |= 1324 (NFSNSF_NEEDLOCK | NFSNSF_EXPIREDCLIENT); 1325 } else { 1326 /* 1327 * If there are no opens, increment no open tick cnt 1328 * If time exceeds NFSNOOPEN, mark it to be thrown away 1329 * otherwise, if there is an open, reset no open time 1330 * Hopefully, this will avoid excessive re-creation 1331 * of open owners and subsequent open confirms. 1332 */ 1333 stp = LIST_FIRST(&clp->lc_open); 1334 while (stp != LIST_END(&clp->lc_open)) { 1335 nstp = LIST_NEXT(stp, ls_list); 1336 if (LIST_EMPTY(&stp->ls_open)) { 1337 stp->ls_noopens++; 1338 if (stp->ls_noopens > NFSNOOPEN || 1339 (nfsrv_openpluslock * 2) > 1340 nfsrv_v4statelimit) 1341 NFSD_VNET(nfsrv_stablefirst).nsf_flags |= 1342 NFSNSF_NOOPENS; 1343 } else { 1344 stp->ls_noopens = 0; 1345 } 1346 stp = nstp; 1347 } 1348 } 1349 } 1350 clp = nclp; 1351 } 1352 } 1353 NFSUNLOCKSTATE(); 1354 NFSLOCKV4ROOTMUTEX(); 1355 nfsv4_relref(&nfsv4rootfs_lock); 1356 NFSUNLOCKV4ROOTMUTEX(); 1357 } 1358 1359 /* 1360 * The following set of functions free up the various data structures. 1361 */ 1362 /* 1363 * Clear out all open/lock state related to this nfsclient. 1364 * Caller must hold an exclusive lock on nfsv4rootfs_lock, so that 1365 * there are no other active nfsd threads. 1366 */ 1367 void 1368 nfsrv_cleanclient(struct nfsclient *clp, NFSPROC_T *p) 1369 { 1370 struct nfsstate *stp, *nstp; 1371 struct nfsdsession *sep, *nsep; 1372 1373 LIST_FOREACH_SAFE(stp, &clp->lc_open, ls_list, nstp) 1374 nfsrv_freeopenowner(stp, 1, p); 1375 if ((clp->lc_flags & LCL_ADMINREVOKED) == 0) 1376 LIST_FOREACH_SAFE(sep, &clp->lc_session, sess_list, nsep) 1377 (void)nfsrv_freesession(sep, NULL); 1378 } 1379 1380 /* 1381 * Free a client that has been cleaned. It should also already have been 1382 * removed from the lists. 1383 * (Just to be safe w.r.t. newnfs_disconnect(), call this function when 1384 * softclock interrupts are enabled.) 1385 */ 1386 void 1387 nfsrv_zapclient(struct nfsclient *clp, NFSPROC_T *p) 1388 { 1389 1390 #ifdef notyet 1391 if ((clp->lc_flags & (LCL_GSS | LCL_CALLBACKSON)) == 1392 (LCL_GSS | LCL_CALLBACKSON) && 1393 (clp->lc_hand.nfsh_flag & NFSG_COMPLETE) && 1394 clp->lc_handlelen > 0) { 1395 clp->lc_hand.nfsh_flag &= ~NFSG_COMPLETE; 1396 clp->lc_hand.nfsh_flag |= NFSG_DESTROYED; 1397 (void) nfsrv_docallback(clp, NFSV4PROC_CBNULL, 1398 NULL, 0, NULL, NULL, NULL, 0, p); 1399 } 1400 #endif 1401 newnfs_disconnect(NULL, &clp->lc_req); 1402 free(clp->lc_req.nr_nam, M_SONAME); 1403 NFSFREEMUTEX(&clp->lc_req.nr_mtx); 1404 free(clp->lc_stateid, M_NFSDCLIENT); 1405 free(clp, M_NFSDCLIENT); 1406 NFSLOCKSTATE(); 1407 NFSD_VNET(nfsstatsv1_p)->srvclients--; 1408 nfsrv_openpluslock--; 1409 nfsrv_clients--; 1410 NFSUNLOCKSTATE(); 1411 } 1412 1413 /* 1414 * Free a list of delegation state structures. 1415 * (This function will also free all nfslockfile structures that no 1416 * longer have associated state.) 1417 */ 1418 void 1419 nfsrv_freedeleglist(struct nfsstatehead *sthp) 1420 { 1421 struct nfsstate *stp, *nstp; 1422 1423 LIST_FOREACH_SAFE(stp, sthp, ls_list, nstp) { 1424 nfsrv_freedeleg(stp); 1425 } 1426 LIST_INIT(sthp); 1427 } 1428 1429 /* 1430 * Free up a delegation. 1431 */ 1432 static void 1433 nfsrv_freedeleg(struct nfsstate *stp) 1434 { 1435 struct nfslockfile *lfp; 1436 1437 LIST_REMOVE(stp, ls_hash); 1438 LIST_REMOVE(stp, ls_list); 1439 LIST_REMOVE(stp, ls_file); 1440 if ((stp->ls_flags & NFSLCK_DELEGWRITE) != 0) 1441 nfsrv_writedelegcnt--; 1442 lfp = stp->ls_lfp; 1443 if (LIST_EMPTY(&lfp->lf_open) && 1444 LIST_EMPTY(&lfp->lf_lock) && LIST_EMPTY(&lfp->lf_deleg) && 1445 LIST_EMPTY(&lfp->lf_locallock) && LIST_EMPTY(&lfp->lf_rollback) && 1446 lfp->lf_usecount == 0 && 1447 nfsv4_testlock(&lfp->lf_locallock_lck) == 0) 1448 nfsrv_freenfslockfile(lfp); 1449 free(stp, M_NFSDSTATE); 1450 NFSD_VNET(nfsstatsv1_p)->srvdelegates--; 1451 nfsrv_openpluslock--; 1452 nfsrv_delegatecnt--; 1453 } 1454 1455 /* 1456 * This function frees an open owner and all associated opens. 1457 */ 1458 static void 1459 nfsrv_freeopenowner(struct nfsstate *stp, int cansleep, NFSPROC_T *p) 1460 { 1461 struct nfsstate *nstp, *tstp; 1462 1463 LIST_REMOVE(stp, ls_list); 1464 /* 1465 * Now, free all associated opens. 1466 */ 1467 nstp = LIST_FIRST(&stp->ls_open); 1468 while (nstp != LIST_END(&stp->ls_open)) { 1469 tstp = nstp; 1470 nstp = LIST_NEXT(nstp, ls_list); 1471 (void) nfsrv_freeopen(tstp, NULL, cansleep, p); 1472 } 1473 if (stp->ls_op) 1474 nfsrvd_derefcache(stp->ls_op); 1475 free(stp, M_NFSDSTATE); 1476 NFSD_VNET(nfsstatsv1_p)->srvopenowners--; 1477 nfsrv_openpluslock--; 1478 } 1479 1480 /* 1481 * This function frees an open (nfsstate open structure) with all associated 1482 * lock_owners and locks. It also frees the nfslockfile structure iff there 1483 * are no other opens on the file. 1484 * Returns 1 if it free'd the nfslockfile, 0 otherwise. 1485 */ 1486 static int 1487 nfsrv_freeopen(struct nfsstate *stp, vnode_t vp, int cansleep, NFSPROC_T *p) 1488 { 1489 struct nfsstate *nstp, *tstp; 1490 struct nfslockfile *lfp; 1491 int ret; 1492 1493 LIST_REMOVE(stp, ls_hash); 1494 LIST_REMOVE(stp, ls_list); 1495 LIST_REMOVE(stp, ls_file); 1496 1497 lfp = stp->ls_lfp; 1498 /* 1499 * Now, free all lockowners associated with this open. 1500 */ 1501 LIST_FOREACH_SAFE(tstp, &stp->ls_open, ls_list, nstp) 1502 nfsrv_freelockowner(tstp, vp, cansleep, p); 1503 1504 /* 1505 * The nfslockfile is freed here if there are no locks 1506 * associated with the open. 1507 * If there are locks associated with the open, the 1508 * nfslockfile structure can be freed via nfsrv_freelockowner(). 1509 * Acquire the state mutex to avoid races with calls to 1510 * nfsrv_getlockfile(). 1511 */ 1512 if (cansleep != 0) 1513 NFSLOCKSTATE(); 1514 if (lfp != NULL && LIST_EMPTY(&lfp->lf_open) && 1515 LIST_EMPTY(&lfp->lf_deleg) && LIST_EMPTY(&lfp->lf_lock) && 1516 LIST_EMPTY(&lfp->lf_locallock) && LIST_EMPTY(&lfp->lf_rollback) && 1517 lfp->lf_usecount == 0 && 1518 (cansleep != 0 || nfsv4_testlock(&lfp->lf_locallock_lck) == 0)) { 1519 nfsrv_freenfslockfile(lfp); 1520 ret = 1; 1521 } else 1522 ret = 0; 1523 if (cansleep != 0) 1524 NFSUNLOCKSTATE(); 1525 free(stp, M_NFSDSTATE); 1526 NFSD_VNET(nfsstatsv1_p)->srvopens--; 1527 nfsrv_openpluslock--; 1528 return (ret); 1529 } 1530 1531 /* 1532 * Frees a lockowner and all associated locks. 1533 */ 1534 static void 1535 nfsrv_freelockowner(struct nfsstate *stp, vnode_t vp, int cansleep, 1536 NFSPROC_T *p) 1537 { 1538 1539 LIST_REMOVE(stp, ls_hash); 1540 LIST_REMOVE(stp, ls_list); 1541 nfsrv_freeallnfslocks(stp, vp, cansleep, p); 1542 if (stp->ls_op) 1543 nfsrvd_derefcache(stp->ls_op); 1544 free(stp, M_NFSDSTATE); 1545 NFSD_VNET(nfsstatsv1_p)->srvlockowners--; 1546 nfsrv_openpluslock--; 1547 } 1548 1549 /* 1550 * Free all the nfs locks on a lockowner. 1551 */ 1552 static void 1553 nfsrv_freeallnfslocks(struct nfsstate *stp, vnode_t vp, int cansleep, 1554 NFSPROC_T *p) 1555 { 1556 struct nfslock *lop, *nlop; 1557 struct nfsrollback *rlp, *nrlp; 1558 struct nfslockfile *lfp = NULL; 1559 int gottvp = 0; 1560 vnode_t tvp = NULL; 1561 uint64_t first, end; 1562 1563 if (vp != NULL) 1564 ASSERT_VOP_UNLOCKED(vp, "nfsrv_freeallnfslocks: vnode locked"); 1565 lop = LIST_FIRST(&stp->ls_lock); 1566 while (lop != LIST_END(&stp->ls_lock)) { 1567 nlop = LIST_NEXT(lop, lo_lckowner); 1568 /* 1569 * Since all locks should be for the same file, lfp should 1570 * not change. 1571 */ 1572 if (lfp == NULL) 1573 lfp = lop->lo_lfp; 1574 else if (lfp != lop->lo_lfp) 1575 panic("allnfslocks"); 1576 /* 1577 * If vp is NULL and cansleep != 0, a vnode must be acquired 1578 * from the file handle. This only occurs when called from 1579 * nfsrv_cleanclient(). 1580 */ 1581 if (gottvp == 0) { 1582 if (nfsrv_dolocallocks == 0) 1583 tvp = NULL; 1584 else if (vp == NULL && cansleep != 0) { 1585 tvp = nfsvno_getvp(&lfp->lf_fh); 1586 if (tvp != NULL) 1587 NFSVOPUNLOCK(tvp); 1588 } else 1589 tvp = vp; 1590 gottvp = 1; 1591 } 1592 1593 if (tvp != NULL) { 1594 if (cansleep == 0) 1595 panic("allnfs2"); 1596 first = lop->lo_first; 1597 end = lop->lo_end; 1598 nfsrv_freenfslock(lop); 1599 nfsrv_localunlock(tvp, lfp, first, end, p); 1600 LIST_FOREACH_SAFE(rlp, &lfp->lf_rollback, rlck_list, 1601 nrlp) 1602 free(rlp, M_NFSDROLLBACK); 1603 LIST_INIT(&lfp->lf_rollback); 1604 } else 1605 nfsrv_freenfslock(lop); 1606 lop = nlop; 1607 } 1608 if (vp == NULL && tvp != NULL) 1609 vrele(tvp); 1610 } 1611 1612 /* 1613 * Free an nfslock structure. 1614 */ 1615 static void 1616 nfsrv_freenfslock(struct nfslock *lop) 1617 { 1618 1619 if (lop->lo_lckfile.le_prev != NULL) { 1620 LIST_REMOVE(lop, lo_lckfile); 1621 NFSD_VNET(nfsstatsv1_p)->srvlocks--; 1622 nfsrv_openpluslock--; 1623 } 1624 LIST_REMOVE(lop, lo_lckowner); 1625 free(lop, M_NFSDLOCK); 1626 } 1627 1628 /* 1629 * This function frees an nfslockfile structure. 1630 */ 1631 static void 1632 nfsrv_freenfslockfile(struct nfslockfile *lfp) 1633 { 1634 1635 LIST_REMOVE(lfp, lf_hash); 1636 free(lfp, M_NFSDLOCKFILE); 1637 } 1638 1639 /* 1640 * This function looks up an nfsstate structure via stateid. 1641 */ 1642 static int 1643 nfsrv_getstate(struct nfsclient *clp, nfsv4stateid_t *stateidp, __unused u_int32_t flags, 1644 struct nfsstate **stpp) 1645 { 1646 struct nfsstate *stp; 1647 struct nfsstatehead *hp; 1648 int error = 0; 1649 1650 *stpp = NULL; 1651 hp = NFSSTATEHASH(clp, *stateidp); 1652 LIST_FOREACH(stp, hp, ls_hash) { 1653 if (!NFSBCMP(stp->ls_stateid.other, stateidp->other, 1654 NFSX_STATEIDOTHER)) 1655 break; 1656 } 1657 1658 /* 1659 * If no state id in list, return NFSERR_BADSTATEID. 1660 */ 1661 if (stp == LIST_END(hp)) { 1662 error = NFSERR_BADSTATEID; 1663 goto out; 1664 } 1665 *stpp = stp; 1666 1667 out: 1668 NFSEXITCODE(error); 1669 return (error); 1670 } 1671 1672 /* 1673 * This function gets an nfsstate structure via owner string. 1674 */ 1675 static void 1676 nfsrv_getowner(struct nfsstatehead *hp, struct nfsstate *new_stp, 1677 struct nfsstate **stpp) 1678 { 1679 struct nfsstate *stp; 1680 1681 *stpp = NULL; 1682 LIST_FOREACH(stp, hp, ls_list) { 1683 if (new_stp->ls_ownerlen == stp->ls_ownerlen && 1684 !NFSBCMP(new_stp->ls_owner,stp->ls_owner,stp->ls_ownerlen)) { 1685 *stpp = stp; 1686 return; 1687 } 1688 } 1689 } 1690 1691 /* 1692 * Lock control function called to update lock status. 1693 * Returns 0 upon success, -1 if there is no lock and the flags indicate 1694 * that one isn't to be created and an NFSERR_xxx for other errors. 1695 * The structures new_stp and new_lop are passed in as pointers that should 1696 * be set to NULL if the structure is used and shouldn't be free'd. 1697 * For the NFSLCK_TEST and NFSLCK_CHECK cases, the structures are 1698 * never used and can safely be allocated on the stack. For all other 1699 * cases, *new_stpp and *new_lopp should be malloc'd before the call, 1700 * in case they are used. 1701 */ 1702 int 1703 nfsrv_lockctrl(vnode_t vp, struct nfsstate **new_stpp, 1704 struct nfslock **new_lopp, struct nfslockconflict *cfp, 1705 nfsquad_t clientid, nfsv4stateid_t *stateidp, 1706 __unused struct nfsexstuff *exp, 1707 struct nfsrv_descript *nd, NFSPROC_T *p) 1708 { 1709 struct nfslock *lop; 1710 struct nfsstate *new_stp = *new_stpp; 1711 struct nfslock *new_lop = *new_lopp; 1712 struct nfsstate *tstp, *mystp, *nstp; 1713 int specialid = 0; 1714 struct nfslockfile *lfp; 1715 struct nfslock *other_lop = NULL; 1716 struct nfsstate *stp, *lckstp = NULL; 1717 struct nfsclient *clp = NULL; 1718 u_int32_t bits; 1719 int error = 0, haslock = 0, ret, reterr; 1720 int getlckret, delegation = 0, filestruct_locked, vnode_unlocked = 0; 1721 fhandle_t nfh; 1722 uint64_t first, end; 1723 uint32_t lock_flags; 1724 1725 if (new_stp->ls_flags & (NFSLCK_CHECK | NFSLCK_SETATTR)) { 1726 /* 1727 * Note the special cases of "all 1s" or "all 0s" stateids and 1728 * let reads with all 1s go ahead. 1729 */ 1730 if (new_stp->ls_stateid.seqid == 0x0 && 1731 new_stp->ls_stateid.other[0] == 0x0 && 1732 new_stp->ls_stateid.other[1] == 0x0 && 1733 new_stp->ls_stateid.other[2] == 0x0) 1734 specialid = 1; 1735 else if (new_stp->ls_stateid.seqid == 0xffffffff && 1736 new_stp->ls_stateid.other[0] == 0xffffffff && 1737 new_stp->ls_stateid.other[1] == 0xffffffff && 1738 new_stp->ls_stateid.other[2] == 0xffffffff) 1739 specialid = 2; 1740 } 1741 1742 /* 1743 * Check for restart conditions (client and server). 1744 */ 1745 error = nfsrv_checkrestart(clientid, new_stp->ls_flags, 1746 &new_stp->ls_stateid, specialid); 1747 if (error) 1748 goto out; 1749 1750 /* 1751 * Check for state resource limit exceeded. 1752 */ 1753 if ((new_stp->ls_flags & NFSLCK_LOCK) && 1754 nfsrv_openpluslock > nfsrv_v4statelimit) { 1755 error = NFSERR_RESOURCE; 1756 goto out; 1757 } 1758 1759 /* 1760 * For the lock case, get another nfslock structure, 1761 * just in case we need it. 1762 * Malloc now, before we start sifting through the linked lists, 1763 * in case we have to wait for memory. 1764 */ 1765 tryagain: 1766 if (new_stp->ls_flags & NFSLCK_LOCK) 1767 other_lop = malloc(sizeof (struct nfslock), 1768 M_NFSDLOCK, M_WAITOK); 1769 filestruct_locked = 0; 1770 reterr = 0; 1771 lfp = NULL; 1772 1773 /* 1774 * Get the lockfile structure for CFH now, so we can do a sanity 1775 * check against the stateid, before incrementing the seqid#, since 1776 * we want to return NFSERR_BADSTATEID on failure and the seqid# 1777 * shouldn't be incremented for this case. 1778 * If nfsrv_getlockfile() returns -1, it means "not found", which 1779 * will be handled later. 1780 * If we are doing Lock/LockU and local locking is enabled, sleep 1781 * lock the nfslockfile structure. 1782 */ 1783 getlckret = nfsrv_getlockfh(vp, new_stp->ls_flags, NULL, &nfh, p); 1784 NFSLOCKSTATE(); 1785 if (getlckret == 0) { 1786 if ((new_stp->ls_flags & (NFSLCK_LOCK | NFSLCK_UNLOCK)) != 0 && 1787 nfsrv_dolocallocks != 0 && nd->nd_repstat == 0) { 1788 getlckret = nfsrv_getlockfile(new_stp->ls_flags, NULL, 1789 &lfp, &nfh, 1); 1790 if (getlckret == 0) 1791 filestruct_locked = 1; 1792 } else 1793 getlckret = nfsrv_getlockfile(new_stp->ls_flags, NULL, 1794 &lfp, &nfh, 0); 1795 } 1796 if (getlckret != 0 && getlckret != -1) 1797 reterr = getlckret; 1798 1799 if (filestruct_locked != 0) { 1800 LIST_INIT(&lfp->lf_rollback); 1801 if ((new_stp->ls_flags & NFSLCK_LOCK)) { 1802 /* 1803 * For local locking, do the advisory locking now, so 1804 * that any conflict can be detected. A failure later 1805 * can be rolled back locally. If an error is returned, 1806 * struct nfslockfile has been unlocked and any local 1807 * locking rolled back. 1808 */ 1809 NFSUNLOCKSTATE(); 1810 if (vnode_unlocked == 0) { 1811 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl1"); 1812 vnode_unlocked = 1; 1813 NFSVOPUNLOCK(vp); 1814 } 1815 reterr = nfsrv_locallock(vp, lfp, 1816 (new_lop->lo_flags & (NFSLCK_READ | NFSLCK_WRITE)), 1817 new_lop->lo_first, new_lop->lo_end, cfp, p); 1818 NFSLOCKSTATE(); 1819 } 1820 } 1821 1822 if (specialid == 0) { 1823 if (new_stp->ls_flags & NFSLCK_TEST) { 1824 /* 1825 * RFC 3530 does not list LockT as an op that renews a 1826 * lease, but the consensus seems to be that it is ok 1827 * for a server to do so. 1828 */ 1829 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 1830 (nfsquad_t)((u_quad_t)0), 0, nd, p); 1831 1832 /* 1833 * Since NFSERR_EXPIRED, NFSERR_ADMINREVOKED are not valid 1834 * error returns for LockT, just go ahead and test for a lock, 1835 * since there are no locks for this client, but other locks 1836 * can conflict. (ie. same client will always be false) 1837 */ 1838 if (error == NFSERR_EXPIRED || error == NFSERR_ADMINREVOKED) 1839 error = 0; 1840 lckstp = new_stp; 1841 } else { 1842 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 1843 (nfsquad_t)((u_quad_t)0), 0, nd, p); 1844 if (error == 0) 1845 /* 1846 * Look up the stateid 1847 */ 1848 error = nfsrv_getstate(clp, &new_stp->ls_stateid, 1849 new_stp->ls_flags, &stp); 1850 /* 1851 * do some sanity checks for an unconfirmed open or a 1852 * stateid that refers to the wrong file, for an open stateid 1853 */ 1854 if (error == 0 && (stp->ls_flags & NFSLCK_OPEN) && 1855 ((stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM) || 1856 (getlckret == 0 && stp->ls_lfp != lfp))){ 1857 /* 1858 * NFSLCK_SETATTR should return OK rather than NFSERR_BADSTATEID 1859 * The only exception is using SETATTR with SIZE. 1860 * */ 1861 if ((new_stp->ls_flags & 1862 (NFSLCK_SETATTR | NFSLCK_CHECK)) != NFSLCK_SETATTR) 1863 error = NFSERR_BADSTATEID; 1864 } 1865 1866 if (error == 0 && 1867 (stp->ls_flags & (NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) && 1868 getlckret == 0 && stp->ls_lfp != lfp) 1869 error = NFSERR_BADSTATEID; 1870 1871 /* 1872 * If the lockowner stateid doesn't refer to the same file, 1873 * I believe that is considered ok, since some clients will 1874 * only create a single lockowner and use that for all locks 1875 * on all files. 1876 * For now, log it as a diagnostic, instead of considering it 1877 * a BadStateid. 1878 */ 1879 if (error == 0 && (stp->ls_flags & 1880 (NFSLCK_OPEN | NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) == 0 && 1881 getlckret == 0 && stp->ls_lfp != lfp) { 1882 #ifdef DIAGNOSTIC 1883 printf("Got a lock statid for different file open\n"); 1884 #endif 1885 /* 1886 error = NFSERR_BADSTATEID; 1887 */ 1888 } 1889 1890 if (error == 0) { 1891 if (new_stp->ls_flags & NFSLCK_OPENTOLOCK) { 1892 /* 1893 * If haslock set, we've already checked the seqid. 1894 */ 1895 if (!haslock) { 1896 if (stp->ls_flags & NFSLCK_OPEN) 1897 error = nfsrv_checkseqid(nd, new_stp->ls_seq, 1898 stp->ls_openowner, new_stp->ls_op); 1899 else 1900 error = NFSERR_BADSTATEID; 1901 } 1902 if (!error) 1903 nfsrv_getowner(&stp->ls_open, new_stp, &lckstp); 1904 if (lckstp) { 1905 /* 1906 * For NFSv4.1 and NFSv4.2 allow an 1907 * open_to_lock_owner when the lock_owner already 1908 * exists. Just clear NFSLCK_OPENTOLOCK so that 1909 * a new lock_owner will not be created. 1910 * RFC7530 states that the error for NFSv4.0 1911 * is NFS4ERR_BAD_SEQID. 1912 */ 1913 if ((nd->nd_flag & ND_NFSV41) != 0) 1914 new_stp->ls_flags &= ~NFSLCK_OPENTOLOCK; 1915 else 1916 error = NFSERR_BADSEQID; 1917 } else 1918 lckstp = new_stp; 1919 } else if (new_stp->ls_flags&(NFSLCK_LOCK|NFSLCK_UNLOCK)) { 1920 /* 1921 * If haslock set, ditto above. 1922 */ 1923 if (!haslock) { 1924 if (stp->ls_flags & NFSLCK_OPEN) 1925 error = NFSERR_BADSTATEID; 1926 else 1927 error = nfsrv_checkseqid(nd, new_stp->ls_seq, 1928 stp, new_stp->ls_op); 1929 } 1930 lckstp = stp; 1931 } else { 1932 lckstp = stp; 1933 } 1934 } 1935 /* 1936 * If the seqid part of the stateid isn't the same, return 1937 * NFSERR_OLDSTATEID for cases other than I/O Ops. 1938 * For I/O Ops, only return NFSERR_OLDSTATEID if 1939 * nfsrv_returnoldstateid is set. (The consensus on the email 1940 * list was that most clients would prefer to not receive 1941 * NFSERR_OLDSTATEID for I/O Ops, but the RFC suggests that that 1942 * is what will happen, so I use the nfsrv_returnoldstateid to 1943 * allow for either server configuration.) 1944 */ 1945 if (!error && stp->ls_stateid.seqid!=new_stp->ls_stateid.seqid && 1946 (((nd->nd_flag & ND_NFSV41) == 0 && 1947 (!(new_stp->ls_flags & NFSLCK_CHECK) || 1948 nfsrv_returnoldstateid)) || 1949 ((nd->nd_flag & ND_NFSV41) != 0 && 1950 new_stp->ls_stateid.seqid != 0))) 1951 error = NFSERR_OLDSTATEID; 1952 } 1953 } 1954 1955 /* 1956 * Now we can check for grace. 1957 */ 1958 if (!error) 1959 error = nfsrv_checkgrace(nd, clp, new_stp->ls_flags); 1960 if ((new_stp->ls_flags & NFSLCK_RECLAIM) && !error && 1961 nfsrv_checkstable(clp)) 1962 error = NFSERR_NOGRACE; 1963 /* 1964 * If we successfully Reclaimed state, note that. 1965 */ 1966 if ((new_stp->ls_flags & NFSLCK_RECLAIM) && !error) 1967 nfsrv_markstable(clp); 1968 1969 /* 1970 * At this point, either error == NFSERR_BADSTATEID or the 1971 * seqid# has been updated, so we can return any error. 1972 * If error == 0, there may be an error in: 1973 * nd_repstat - Set by the calling function. 1974 * reterr - Set above, if getting the nfslockfile structure 1975 * or acquiring the local lock failed. 1976 * (If both of these are set, nd_repstat should probably be 1977 * returned, since that error was detected before this 1978 * function call.) 1979 */ 1980 if (error != 0 || nd->nd_repstat != 0 || reterr != 0) { 1981 if (error == 0) { 1982 if (nd->nd_repstat != 0) 1983 error = nd->nd_repstat; 1984 else 1985 error = reterr; 1986 } 1987 if (filestruct_locked != 0) { 1988 /* Roll back local locks. */ 1989 NFSUNLOCKSTATE(); 1990 if (vnode_unlocked == 0) { 1991 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl2"); 1992 vnode_unlocked = 1; 1993 NFSVOPUNLOCK(vp); 1994 } 1995 nfsrv_locallock_rollback(vp, lfp, p); 1996 NFSLOCKSTATE(); 1997 nfsrv_unlocklf(lfp); 1998 } 1999 NFSUNLOCKSTATE(); 2000 goto out; 2001 } 2002 2003 /* 2004 * Check the nfsrv_getlockfile return. 2005 * Returned -1 if no structure found. 2006 */ 2007 if (getlckret == -1) { 2008 error = NFSERR_EXPIRED; 2009 /* 2010 * Called from lockt, so no lock is OK. 2011 */ 2012 if (new_stp->ls_flags & NFSLCK_TEST) { 2013 error = 0; 2014 } else if (new_stp->ls_flags & 2015 (NFSLCK_CHECK | NFSLCK_SETATTR)) { 2016 /* 2017 * Called to check for a lock, OK if the stateid is all 2018 * 1s or all 0s, but there should be an nfsstate 2019 * otherwise. 2020 * (ie. If there is no open, I'll assume no share 2021 * deny bits.) 2022 */ 2023 if (specialid) 2024 error = 0; 2025 else 2026 error = NFSERR_BADSTATEID; 2027 } 2028 NFSUNLOCKSTATE(); 2029 goto out; 2030 } 2031 2032 /* 2033 * For NFSLCK_CHECK and NFSLCK_LOCK, test for a share conflict. 2034 * For NFSLCK_CHECK, allow a read if write access is granted, 2035 * but check for a deny. For NFSLCK_LOCK, require correct access, 2036 * which implies a conflicting deny can't exist. 2037 */ 2038 if (new_stp->ls_flags & (NFSLCK_CHECK | NFSLCK_LOCK)) { 2039 /* 2040 * Four kinds of state id: 2041 * - specialid (all 0s or all 1s), only for NFSLCK_CHECK 2042 * - stateid for an open 2043 * - stateid for a delegation 2044 * - stateid for a lock owner 2045 */ 2046 if (!specialid) { 2047 if (stp->ls_flags & (NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) { 2048 delegation = 1; 2049 mystp = stp; 2050 nfsrv_delaydelegtimeout(stp); 2051 } else if (stp->ls_flags & NFSLCK_OPEN) { 2052 mystp = stp; 2053 } else { 2054 mystp = stp->ls_openstp; 2055 } 2056 /* 2057 * If locking or checking, require correct access 2058 * bit set. 2059 */ 2060 if (((new_stp->ls_flags & NFSLCK_LOCK) && 2061 !((new_lop->lo_flags >> NFSLCK_LOCKSHIFT) & 2062 mystp->ls_flags & NFSLCK_ACCESSBITS)) || 2063 ((new_stp->ls_flags & (NFSLCK_CHECK|NFSLCK_READACCESS)) == 2064 (NFSLCK_CHECK | NFSLCK_READACCESS) && 2065 !(mystp->ls_flags & NFSLCK_READACCESS) && 2066 nfsrv_allowreadforwriteopen == 0) || 2067 ((new_stp->ls_flags & (NFSLCK_CHECK|NFSLCK_WRITEACCESS)) == 2068 (NFSLCK_CHECK | NFSLCK_WRITEACCESS) && 2069 !(mystp->ls_flags & NFSLCK_WRITEACCESS))) { 2070 if (filestruct_locked != 0) { 2071 /* Roll back local locks. */ 2072 NFSUNLOCKSTATE(); 2073 if (vnode_unlocked == 0) { 2074 ASSERT_VOP_ELOCKED(vp, 2075 "nfsrv_lockctrl3"); 2076 vnode_unlocked = 1; 2077 NFSVOPUNLOCK(vp); 2078 } 2079 nfsrv_locallock_rollback(vp, lfp, p); 2080 NFSLOCKSTATE(); 2081 nfsrv_unlocklf(lfp); 2082 } 2083 NFSUNLOCKSTATE(); 2084 error = NFSERR_OPENMODE; 2085 goto out; 2086 } 2087 } else 2088 mystp = NULL; 2089 if ((new_stp->ls_flags & NFSLCK_CHECK) && !delegation) { 2090 /* 2091 * Check for a conflicting deny bit. 2092 */ 2093 LIST_FOREACH(tstp, &lfp->lf_open, ls_file) { 2094 if (tstp != mystp) { 2095 bits = tstp->ls_flags; 2096 bits >>= NFSLCK_SHIFT; 2097 if (new_stp->ls_flags & bits & NFSLCK_ACCESSBITS) { 2098 KASSERT(vnode_unlocked == 0, 2099 ("nfsrv_lockctrl: vnode unlocked1")); 2100 ret = nfsrv_clientconflict(tstp->ls_clp, &haslock, 2101 vp, p); 2102 if (ret == 1) { 2103 /* 2104 * nfsrv_clientconflict unlocks state 2105 * when it returns non-zero. 2106 */ 2107 lckstp = NULL; 2108 goto tryagain; 2109 } 2110 if (ret == 0) 2111 NFSUNLOCKSTATE(); 2112 if (ret == 2) 2113 error = NFSERR_PERM; 2114 else 2115 error = NFSERR_OPENMODE; 2116 goto out; 2117 } 2118 } 2119 } 2120 2121 /* We're outta here */ 2122 NFSUNLOCKSTATE(); 2123 goto out; 2124 } 2125 } 2126 2127 /* 2128 * For setattr, just get rid of all the Delegations for other clients. 2129 */ 2130 if (new_stp->ls_flags & NFSLCK_SETATTR) { 2131 KASSERT(vnode_unlocked == 0, 2132 ("nfsrv_lockctrl: vnode unlocked2")); 2133 ret = nfsrv_cleandeleg(vp, lfp, clp, &haslock, p); 2134 if (ret) { 2135 /* 2136 * nfsrv_cleandeleg() unlocks state when it 2137 * returns non-zero. 2138 */ 2139 if (ret == -1) { 2140 lckstp = NULL; 2141 goto tryagain; 2142 } 2143 error = ret; 2144 goto out; 2145 } 2146 if (!(new_stp->ls_flags & NFSLCK_CHECK) || 2147 (LIST_EMPTY(&lfp->lf_open) && LIST_EMPTY(&lfp->lf_lock) && 2148 LIST_EMPTY(&lfp->lf_deleg))) { 2149 NFSUNLOCKSTATE(); 2150 goto out; 2151 } 2152 } 2153 2154 /* 2155 * Check for a conflicting delegation. If one is found, call 2156 * nfsrv_delegconflict() to handle it. If the v4root lock hasn't 2157 * been set yet, it will get the lock. Otherwise, it will recall 2158 * the delegation. Then, we try try again... 2159 * I currently believe the conflict algorithm to be: 2160 * For Lock Ops (Lock/LockT/LockU) 2161 * - there is a conflict iff a different client has a write delegation 2162 * For Reading (Read Op) 2163 * - there is a conflict iff a different client has a write delegation 2164 * (the specialids are always a different client) 2165 * For Writing (Write/Setattr of size) 2166 * - there is a conflict if a different client has any delegation 2167 * - there is a conflict if the same client has a read delegation 2168 * (I don't understand why this isn't allowed, but that seems to be 2169 * the current consensus?) 2170 */ 2171 tstp = LIST_FIRST(&lfp->lf_deleg); 2172 while (tstp != LIST_END(&lfp->lf_deleg)) { 2173 nstp = LIST_NEXT(tstp, ls_file); 2174 if ((((new_stp->ls_flags&(NFSLCK_LOCK|NFSLCK_UNLOCK|NFSLCK_TEST))|| 2175 ((new_stp->ls_flags & NFSLCK_CHECK) && 2176 (new_lop->lo_flags & NFSLCK_READ))) && 2177 clp != tstp->ls_clp && 2178 (tstp->ls_flags & NFSLCK_DELEGWRITE)) || 2179 ((new_stp->ls_flags & NFSLCK_CHECK) && 2180 (new_lop->lo_flags & NFSLCK_WRITE) && 2181 (clp != tstp->ls_clp || 2182 (tstp->ls_flags & NFSLCK_DELEGREAD)))) { 2183 ret = 0; 2184 if (filestruct_locked != 0) { 2185 /* Roll back local locks. */ 2186 NFSUNLOCKSTATE(); 2187 if (vnode_unlocked == 0) { 2188 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl4"); 2189 NFSVOPUNLOCK(vp); 2190 } 2191 nfsrv_locallock_rollback(vp, lfp, p); 2192 NFSLOCKSTATE(); 2193 nfsrv_unlocklf(lfp); 2194 NFSUNLOCKSTATE(); 2195 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 2196 vnode_unlocked = 0; 2197 if (VN_IS_DOOMED(vp)) 2198 ret = NFSERR_SERVERFAULT; 2199 NFSLOCKSTATE(); 2200 } 2201 if (ret == 0) 2202 ret = nfsrv_delegconflict(tstp, &haslock, p, vp); 2203 if (ret) { 2204 /* 2205 * nfsrv_delegconflict unlocks state when it 2206 * returns non-zero, which it always does. 2207 */ 2208 if (other_lop) { 2209 free(other_lop, M_NFSDLOCK); 2210 other_lop = NULL; 2211 } 2212 if (ret == -1) { 2213 lckstp = NULL; 2214 goto tryagain; 2215 } 2216 error = ret; 2217 goto out; 2218 } 2219 /* Never gets here. */ 2220 } 2221 tstp = nstp; 2222 } 2223 2224 /* 2225 * Handle the unlock case by calling nfsrv_updatelock(). 2226 * (Should I have done some access checking above for unlock? For now, 2227 * just let it happen.) 2228 */ 2229 if (new_stp->ls_flags & NFSLCK_UNLOCK) { 2230 first = new_lop->lo_first; 2231 end = new_lop->lo_end; 2232 nfsrv_updatelock(stp, new_lopp, &other_lop, lfp); 2233 stateidp->seqid = ++(stp->ls_stateid.seqid); 2234 if ((nd->nd_flag & ND_NFSV41) != 0 && stateidp->seqid == 0) 2235 stateidp->seqid = stp->ls_stateid.seqid = 1; 2236 stateidp->other[0] = stp->ls_stateid.other[0]; 2237 stateidp->other[1] = stp->ls_stateid.other[1]; 2238 stateidp->other[2] = stp->ls_stateid.other[2]; 2239 if (filestruct_locked != 0) { 2240 NFSUNLOCKSTATE(); 2241 if (vnode_unlocked == 0) { 2242 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl5"); 2243 vnode_unlocked = 1; 2244 NFSVOPUNLOCK(vp); 2245 } 2246 /* Update the local locks. */ 2247 nfsrv_localunlock(vp, lfp, first, end, p); 2248 NFSLOCKSTATE(); 2249 nfsrv_unlocklf(lfp); 2250 } 2251 NFSUNLOCKSTATE(); 2252 goto out; 2253 } 2254 2255 /* 2256 * Search for a conflicting lock. A lock conflicts if: 2257 * - the lock range overlaps and 2258 * - at least one lock is a write lock and 2259 * - it is not owned by the same lock owner 2260 */ 2261 if (!delegation) { 2262 LIST_FOREACH(lop, &lfp->lf_lock, lo_lckfile) { 2263 if (new_lop->lo_end > lop->lo_first && 2264 new_lop->lo_first < lop->lo_end && 2265 (new_lop->lo_flags == NFSLCK_WRITE || 2266 lop->lo_flags == NFSLCK_WRITE) && 2267 lckstp != lop->lo_stp && 2268 (clp != lop->lo_stp->ls_clp || 2269 lckstp->ls_ownerlen != lop->lo_stp->ls_ownerlen || 2270 NFSBCMP(lckstp->ls_owner, lop->lo_stp->ls_owner, 2271 lckstp->ls_ownerlen))) { 2272 if (other_lop) { 2273 free(other_lop, M_NFSDLOCK); 2274 other_lop = NULL; 2275 } 2276 if (vnode_unlocked != 0) 2277 ret = nfsrv_clientconflict(lop->lo_stp->ls_clp, &haslock, 2278 NULL, p); 2279 else 2280 ret = nfsrv_clientconflict(lop->lo_stp->ls_clp, &haslock, 2281 vp, p); 2282 if (ret == 1) { 2283 if (filestruct_locked != 0) { 2284 if (vnode_unlocked == 0) { 2285 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl6"); 2286 NFSVOPUNLOCK(vp); 2287 } 2288 /* Roll back local locks. */ 2289 nfsrv_locallock_rollback(vp, lfp, p); 2290 NFSLOCKSTATE(); 2291 nfsrv_unlocklf(lfp); 2292 NFSUNLOCKSTATE(); 2293 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 2294 vnode_unlocked = 0; 2295 if (VN_IS_DOOMED(vp)) { 2296 error = NFSERR_SERVERFAULT; 2297 goto out; 2298 } 2299 } 2300 /* 2301 * nfsrv_clientconflict() unlocks state when it 2302 * returns non-zero. 2303 */ 2304 lckstp = NULL; 2305 goto tryagain; 2306 } 2307 /* 2308 * Found a conflicting lock, so record the conflict and 2309 * return the error. 2310 */ 2311 if (cfp != NULL && ret == 0) { 2312 cfp->cl_clientid.lval[0]=lop->lo_stp->ls_stateid.other[0]; 2313 cfp->cl_clientid.lval[1]=lop->lo_stp->ls_stateid.other[1]; 2314 cfp->cl_first = lop->lo_first; 2315 cfp->cl_end = lop->lo_end; 2316 cfp->cl_flags = lop->lo_flags; 2317 cfp->cl_ownerlen = lop->lo_stp->ls_ownerlen; 2318 NFSBCOPY(lop->lo_stp->ls_owner, cfp->cl_owner, 2319 cfp->cl_ownerlen); 2320 } 2321 if (ret == 2) 2322 error = NFSERR_PERM; 2323 else if (new_stp->ls_flags & NFSLCK_RECLAIM) 2324 error = NFSERR_RECLAIMCONFLICT; 2325 else if (new_stp->ls_flags & NFSLCK_CHECK) 2326 error = NFSERR_LOCKED; 2327 else 2328 error = NFSERR_DENIED; 2329 if (filestruct_locked != 0 && ret == 0) { 2330 /* Roll back local locks. */ 2331 NFSUNLOCKSTATE(); 2332 if (vnode_unlocked == 0) { 2333 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl7"); 2334 vnode_unlocked = 1; 2335 NFSVOPUNLOCK(vp); 2336 } 2337 nfsrv_locallock_rollback(vp, lfp, p); 2338 NFSLOCKSTATE(); 2339 nfsrv_unlocklf(lfp); 2340 } 2341 if (ret == 0) 2342 NFSUNLOCKSTATE(); 2343 goto out; 2344 } 2345 } 2346 } 2347 2348 /* 2349 * We only get here if there was no lock that conflicted. 2350 */ 2351 if (new_stp->ls_flags & (NFSLCK_TEST | NFSLCK_CHECK)) { 2352 NFSUNLOCKSTATE(); 2353 goto out; 2354 } 2355 2356 /* 2357 * We only get here when we are creating or modifying a lock. 2358 * There are two variants: 2359 * - exist_lock_owner where lock_owner exists 2360 * - open_to_lock_owner with new lock_owner 2361 */ 2362 first = new_lop->lo_first; 2363 end = new_lop->lo_end; 2364 lock_flags = new_lop->lo_flags; 2365 if (!(new_stp->ls_flags & NFSLCK_OPENTOLOCK)) { 2366 nfsrv_updatelock(lckstp, new_lopp, &other_lop, lfp); 2367 stateidp->seqid = ++(lckstp->ls_stateid.seqid); 2368 if ((nd->nd_flag & ND_NFSV41) != 0 && stateidp->seqid == 0) 2369 stateidp->seqid = lckstp->ls_stateid.seqid = 1; 2370 stateidp->other[0] = lckstp->ls_stateid.other[0]; 2371 stateidp->other[1] = lckstp->ls_stateid.other[1]; 2372 stateidp->other[2] = lckstp->ls_stateid.other[2]; 2373 } else { 2374 /* 2375 * The new open_to_lock_owner case. 2376 * Link the new nfsstate into the lists. 2377 */ 2378 new_stp->ls_seq = new_stp->ls_opentolockseq; 2379 nfsrvd_refcache(new_stp->ls_op); 2380 stateidp->seqid = new_stp->ls_stateid.seqid = 1; 2381 stateidp->other[0] = new_stp->ls_stateid.other[0] = 2382 clp->lc_clientid.lval[0]; 2383 stateidp->other[1] = new_stp->ls_stateid.other[1] = 2384 clp->lc_clientid.lval[1]; 2385 stateidp->other[2] = new_stp->ls_stateid.other[2] = 2386 nfsrv_nextstateindex(clp); 2387 new_stp->ls_clp = clp; 2388 LIST_INIT(&new_stp->ls_lock); 2389 new_stp->ls_openstp = stp; 2390 new_stp->ls_lfp = lfp; 2391 nfsrv_insertlock(new_lop, (struct nfslock *)new_stp, new_stp, 2392 lfp); 2393 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_stp->ls_stateid), 2394 new_stp, ls_hash); 2395 LIST_INSERT_HEAD(&stp->ls_open, new_stp, ls_list); 2396 *new_lopp = NULL; 2397 *new_stpp = NULL; 2398 NFSD_VNET(nfsstatsv1_p)->srvlockowners++; 2399 nfsrv_openpluslock++; 2400 } 2401 if (filestruct_locked != 0) { 2402 NFSUNLOCKSTATE(); 2403 nfsrv_locallock_commit(lfp, lock_flags, first, end); 2404 NFSLOCKSTATE(); 2405 nfsrv_unlocklf(lfp); 2406 } 2407 NFSUNLOCKSTATE(); 2408 2409 out: 2410 if (haslock) { 2411 NFSLOCKV4ROOTMUTEX(); 2412 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2413 NFSUNLOCKV4ROOTMUTEX(); 2414 } 2415 if (vnode_unlocked != 0) { 2416 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 2417 if (error == 0 && VN_IS_DOOMED(vp)) 2418 error = NFSERR_SERVERFAULT; 2419 } 2420 if (other_lop) 2421 free(other_lop, M_NFSDLOCK); 2422 NFSEXITCODE2(error, nd); 2423 return (error); 2424 } 2425 2426 /* 2427 * Check for state errors for Open. 2428 * repstat is passed back out as an error if more critical errors 2429 * are not detected. 2430 */ 2431 int 2432 nfsrv_opencheck(nfsquad_t clientid, nfsv4stateid_t *stateidp, 2433 struct nfsstate *new_stp, vnode_t vp, struct nfsrv_descript *nd, 2434 NFSPROC_T *p, int repstat) 2435 { 2436 struct nfsstate *stp, *nstp; 2437 struct nfsclient *clp; 2438 struct nfsstate *ownerstp; 2439 struct nfslockfile *lfp, *new_lfp; 2440 int error = 0, haslock = 0, ret, readonly = 0, getfhret = 0; 2441 2442 if ((new_stp->ls_flags & NFSLCK_SHAREBITS) == NFSLCK_READACCESS) 2443 readonly = 1; 2444 /* 2445 * Check for restart conditions (client and server). 2446 */ 2447 error = nfsrv_checkrestart(clientid, new_stp->ls_flags, 2448 &new_stp->ls_stateid, 0); 2449 if (error) 2450 goto out; 2451 2452 /* 2453 * Check for state resource limit exceeded. 2454 * Technically this should be SMP protected, but the worst 2455 * case error is "out by one or two" on the count when it 2456 * returns NFSERR_RESOURCE and the limit is just a rather 2457 * arbitrary high water mark, so no harm is done. 2458 */ 2459 if (nfsrv_openpluslock > nfsrv_v4statelimit) { 2460 error = NFSERR_RESOURCE; 2461 goto out; 2462 } 2463 2464 tryagain: 2465 new_lfp = malloc(sizeof (struct nfslockfile), 2466 M_NFSDLOCKFILE, M_WAITOK); 2467 if (vp) 2468 getfhret = nfsrv_getlockfh(vp, new_stp->ls_flags, new_lfp, 2469 NULL, p); 2470 NFSLOCKSTATE(); 2471 /* 2472 * Get the nfsclient structure. 2473 */ 2474 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 2475 (nfsquad_t)((u_quad_t)0), 0, nd, p); 2476 2477 /* 2478 * Look up the open owner. See if it needs confirmation and 2479 * check the seq#, as required. 2480 */ 2481 if (!error) 2482 nfsrv_getowner(&clp->lc_open, new_stp, &ownerstp); 2483 2484 if (!error && ownerstp) { 2485 error = nfsrv_checkseqid(nd, new_stp->ls_seq, ownerstp, 2486 new_stp->ls_op); 2487 /* 2488 * If the OpenOwner hasn't been confirmed, assume the 2489 * old one was a replay and this one is ok. 2490 * See: RFC3530 Sec. 14.2.18. 2491 */ 2492 if (error == NFSERR_BADSEQID && 2493 (ownerstp->ls_flags & NFSLCK_NEEDSCONFIRM)) 2494 error = 0; 2495 } 2496 2497 /* 2498 * Check for grace. 2499 */ 2500 if (!error) 2501 error = nfsrv_checkgrace(nd, clp, new_stp->ls_flags); 2502 if ((new_stp->ls_flags & NFSLCK_RECLAIM) && !error && 2503 nfsrv_checkstable(clp)) 2504 error = NFSERR_NOGRACE; 2505 2506 /* 2507 * If none of the above errors occurred, let repstat be 2508 * returned. 2509 */ 2510 if (repstat && !error) 2511 error = repstat; 2512 if (error) { 2513 NFSUNLOCKSTATE(); 2514 if (haslock) { 2515 NFSLOCKV4ROOTMUTEX(); 2516 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2517 NFSUNLOCKV4ROOTMUTEX(); 2518 } 2519 free(new_lfp, M_NFSDLOCKFILE); 2520 goto out; 2521 } 2522 2523 /* 2524 * If vp == NULL, the file doesn't exist yet, so return ok. 2525 * (This always happens on the first pass, so haslock must be 0.) 2526 */ 2527 if (vp == NULL) { 2528 NFSUNLOCKSTATE(); 2529 free(new_lfp, M_NFSDLOCKFILE); 2530 goto out; 2531 } 2532 2533 /* 2534 * Get the structure for the underlying file. 2535 */ 2536 if (getfhret) 2537 error = getfhret; 2538 else 2539 error = nfsrv_getlockfile(new_stp->ls_flags, &new_lfp, &lfp, 2540 NULL, 0); 2541 if (new_lfp) 2542 free(new_lfp, M_NFSDLOCKFILE); 2543 if (error) { 2544 NFSUNLOCKSTATE(); 2545 if (haslock) { 2546 NFSLOCKV4ROOTMUTEX(); 2547 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2548 NFSUNLOCKV4ROOTMUTEX(); 2549 } 2550 goto out; 2551 } 2552 2553 /* 2554 * Search for a conflicting open/share. 2555 */ 2556 if (new_stp->ls_flags & NFSLCK_DELEGCUR) { 2557 /* 2558 * For Delegate_Cur, search for the matching Delegation, 2559 * which indicates no conflict. 2560 * An old delegation should have been recovered by the 2561 * client doing a Claim_DELEGATE_Prev, so I won't let 2562 * it match and return NFSERR_EXPIRED. Should I let it 2563 * match? 2564 */ 2565 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) { 2566 if (!(stp->ls_flags & NFSLCK_OLDDELEG) && 2567 (((nd->nd_flag & ND_NFSV41) != 0 && 2568 stateidp->seqid == 0) || 2569 stateidp->seqid == stp->ls_stateid.seqid) && 2570 !NFSBCMP(stateidp->other, stp->ls_stateid.other, 2571 NFSX_STATEIDOTHER)) 2572 break; 2573 } 2574 if (stp == LIST_END(&lfp->lf_deleg) || 2575 ((new_stp->ls_flags & NFSLCK_WRITEACCESS) && 2576 (stp->ls_flags & NFSLCK_DELEGREAD))) { 2577 NFSUNLOCKSTATE(); 2578 if (haslock) { 2579 NFSLOCKV4ROOTMUTEX(); 2580 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2581 NFSUNLOCKV4ROOTMUTEX(); 2582 } 2583 error = NFSERR_EXPIRED; 2584 goto out; 2585 } 2586 } 2587 2588 /* 2589 * Check for access/deny bit conflicts. I check for the same 2590 * owner as well, in case the client didn't bother. 2591 */ 2592 LIST_FOREACH(stp, &lfp->lf_open, ls_file) { 2593 if (!(new_stp->ls_flags & NFSLCK_DELEGCUR) && 2594 (((new_stp->ls_flags & NFSLCK_ACCESSBITS) & 2595 ((stp->ls_flags>>NFSLCK_SHIFT) & NFSLCK_ACCESSBITS))|| 2596 ((stp->ls_flags & NFSLCK_ACCESSBITS) & 2597 ((new_stp->ls_flags>>NFSLCK_SHIFT)&NFSLCK_ACCESSBITS)))){ 2598 ret = nfsrv_clientconflict(stp->ls_clp,&haslock,vp,p); 2599 if (ret == 1) { 2600 /* 2601 * nfsrv_clientconflict() unlocks 2602 * state when it returns non-zero. 2603 */ 2604 goto tryagain; 2605 } 2606 if (ret == 2) 2607 error = NFSERR_PERM; 2608 else if (new_stp->ls_flags & NFSLCK_RECLAIM) 2609 error = NFSERR_RECLAIMCONFLICT; 2610 else 2611 error = NFSERR_SHAREDENIED; 2612 if (ret == 0) 2613 NFSUNLOCKSTATE(); 2614 if (haslock) { 2615 NFSLOCKV4ROOTMUTEX(); 2616 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2617 NFSUNLOCKV4ROOTMUTEX(); 2618 } 2619 goto out; 2620 } 2621 } 2622 2623 /* 2624 * Check for a conflicting delegation. If one is found, call 2625 * nfsrv_delegconflict() to handle it. If the v4root lock hasn't 2626 * been set yet, it will get the lock. Otherwise, it will recall 2627 * the delegation. Then, we try try again... 2628 * (If NFSLCK_DELEGCUR is set, it has a delegation, so there 2629 * isn't a conflict.) 2630 * I currently believe the conflict algorithm to be: 2631 * For Open with Read Access and Deny None 2632 * - there is a conflict iff a different client has a write delegation 2633 * For Open with other Write Access or any Deny except None 2634 * - there is a conflict if a different client has any delegation 2635 * - there is a conflict if the same client has a read delegation 2636 * (The current consensus is that this last case should be 2637 * considered a conflict since the client with a read delegation 2638 * could have done an Open with ReadAccess and WriteDeny 2639 * locally and then not have checked for the WriteDeny.) 2640 * Don't check for a Reclaim, since that will be dealt with 2641 * by nfsrv_openctrl(). 2642 */ 2643 if (!(new_stp->ls_flags & 2644 (NFSLCK_DELEGPREV | NFSLCK_DELEGCUR | NFSLCK_RECLAIM))) { 2645 stp = LIST_FIRST(&lfp->lf_deleg); 2646 while (stp != LIST_END(&lfp->lf_deleg)) { 2647 nstp = LIST_NEXT(stp, ls_file); 2648 if ((readonly && stp->ls_clp != clp && 2649 (stp->ls_flags & NFSLCK_DELEGWRITE)) || 2650 (!readonly && (stp->ls_clp != clp || 2651 (stp->ls_flags & NFSLCK_DELEGREAD)))) { 2652 ret = nfsrv_delegconflict(stp, &haslock, p, vp); 2653 if (ret) { 2654 /* 2655 * nfsrv_delegconflict() unlocks state 2656 * when it returns non-zero. 2657 */ 2658 if (ret == -1) 2659 goto tryagain; 2660 error = ret; 2661 goto out; 2662 } 2663 } 2664 stp = nstp; 2665 } 2666 } 2667 NFSUNLOCKSTATE(); 2668 if (haslock) { 2669 NFSLOCKV4ROOTMUTEX(); 2670 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2671 NFSUNLOCKV4ROOTMUTEX(); 2672 } 2673 2674 out: 2675 NFSEXITCODE2(error, nd); 2676 return (error); 2677 } 2678 2679 /* 2680 * Open control function to create/update open state for an open. 2681 */ 2682 int 2683 nfsrv_openctrl(struct nfsrv_descript *nd, vnode_t vp, 2684 struct nfsstate **new_stpp, nfsquad_t clientid, nfsv4stateid_t *stateidp, 2685 nfsv4stateid_t *delegstateidp, u_int32_t *rflagsp, struct nfsexstuff *exp, 2686 NFSPROC_T *p, u_quad_t filerev) 2687 { 2688 struct nfsstate *new_stp = *new_stpp; 2689 struct nfsstate *stp, *nstp; 2690 struct nfsstate *openstp = NULL, *new_open, *ownerstp, *new_deleg; 2691 struct nfslockfile *lfp, *new_lfp; 2692 struct nfsclient *clp; 2693 int error = 0, haslock = 0, ret, delegate = 1, writedeleg = 1; 2694 int readonly = 0, cbret = 1, getfhret = 0; 2695 int gotstate = 0, len = 0; 2696 u_char *clidp = NULL; 2697 2698 if ((new_stp->ls_flags & NFSLCK_SHAREBITS) == NFSLCK_READACCESS) 2699 readonly = 1; 2700 /* 2701 * Check for restart conditions (client and server). 2702 * (Paranoia, should have been detected by nfsrv_opencheck().) 2703 * If an error does show up, return NFSERR_EXPIRED, since the 2704 * the seqid# has already been incremented. 2705 */ 2706 error = nfsrv_checkrestart(clientid, new_stp->ls_flags, 2707 &new_stp->ls_stateid, 0); 2708 if (error) { 2709 printf("Nfsd: openctrl unexpected restart err=%d\n", 2710 error); 2711 error = NFSERR_EXPIRED; 2712 goto out; 2713 } 2714 2715 clidp = malloc(NFSV4_OPAQUELIMIT, M_TEMP, M_WAITOK); 2716 tryagain: 2717 new_lfp = malloc(sizeof (struct nfslockfile), 2718 M_NFSDLOCKFILE, M_WAITOK); 2719 new_open = malloc(sizeof (struct nfsstate), 2720 M_NFSDSTATE, M_WAITOK); 2721 new_deleg = malloc(sizeof (struct nfsstate), 2722 M_NFSDSTATE, M_WAITOK); 2723 getfhret = nfsrv_getlockfh(vp, new_stp->ls_flags, new_lfp, 2724 NULL, p); 2725 NFSLOCKSTATE(); 2726 /* 2727 * Get the client structure. Since the linked lists could be changed 2728 * by other nfsd processes if this process does a tsleep(), one of 2729 * two things must be done. 2730 * 1 - don't tsleep() 2731 * or 2732 * 2 - get the nfsv4_lock() { indicated by haslock == 1 } 2733 * before using the lists, since this lock stops the other 2734 * nfsd. This should only be used for rare cases, since it 2735 * essentially single threads the nfsd. 2736 * At this time, it is only done for cases where the stable 2737 * storage file must be written prior to completion of state 2738 * expiration. 2739 */ 2740 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 2741 (nfsquad_t)((u_quad_t)0), 0, nd, p); 2742 if (!error && (clp->lc_flags & LCL_NEEDSCBNULL) && 2743 clp->lc_program) { 2744 /* 2745 * This happens on the first open for a client 2746 * that supports callbacks. 2747 */ 2748 NFSUNLOCKSTATE(); 2749 /* 2750 * Although nfsrv_docallback() will sleep, clp won't 2751 * go away, since they are only removed when the 2752 * nfsv4_lock() has blocked the nfsd threads. The 2753 * fields in clp can change, but having multiple 2754 * threads do this Null callback RPC should be 2755 * harmless. 2756 */ 2757 cbret = nfsrv_docallback(clp, NFSV4PROC_CBNULL, 2758 NULL, 0, NULL, NULL, NULL, 0, p); 2759 NFSLOCKSTATE(); 2760 clp->lc_flags &= ~LCL_NEEDSCBNULL; 2761 if (!cbret) 2762 clp->lc_flags |= LCL_CALLBACKSON; 2763 } 2764 2765 /* 2766 * Look up the open owner. See if it needs confirmation and 2767 * check the seq#, as required. 2768 */ 2769 if (!error) 2770 nfsrv_getowner(&clp->lc_open, new_stp, &ownerstp); 2771 2772 if (error) { 2773 NFSUNLOCKSTATE(); 2774 printf("Nfsd: openctrl unexpected state err=%d\n", 2775 error); 2776 free(new_lfp, M_NFSDLOCKFILE); 2777 free(new_open, M_NFSDSTATE); 2778 free(new_deleg, M_NFSDSTATE); 2779 if (haslock) { 2780 NFSLOCKV4ROOTMUTEX(); 2781 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2782 NFSUNLOCKV4ROOTMUTEX(); 2783 } 2784 error = NFSERR_EXPIRED; 2785 goto out; 2786 } 2787 2788 if (new_stp->ls_flags & NFSLCK_RECLAIM) 2789 nfsrv_markstable(clp); 2790 2791 /* 2792 * Get the structure for the underlying file. 2793 */ 2794 if (getfhret) 2795 error = getfhret; 2796 else 2797 error = nfsrv_getlockfile(new_stp->ls_flags, &new_lfp, &lfp, 2798 NULL, 0); 2799 if (new_lfp) 2800 free(new_lfp, M_NFSDLOCKFILE); 2801 if (error) { 2802 NFSUNLOCKSTATE(); 2803 printf("Nfsd openctrl unexpected getlockfile err=%d\n", 2804 error); 2805 free(new_open, M_NFSDSTATE); 2806 free(new_deleg, M_NFSDSTATE); 2807 if (haslock) { 2808 NFSLOCKV4ROOTMUTEX(); 2809 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2810 NFSUNLOCKV4ROOTMUTEX(); 2811 } 2812 goto out; 2813 } 2814 2815 /* 2816 * Search for a conflicting open/share. 2817 */ 2818 if (new_stp->ls_flags & NFSLCK_DELEGCUR) { 2819 /* 2820 * For Delegate_Cur, search for the matching Delegation, 2821 * which indicates no conflict. 2822 * An old delegation should have been recovered by the 2823 * client doing a Claim_DELEGATE_Prev, so I won't let 2824 * it match and return NFSERR_EXPIRED. Should I let it 2825 * match? 2826 */ 2827 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) { 2828 if (!(stp->ls_flags & NFSLCK_OLDDELEG) && 2829 (((nd->nd_flag & ND_NFSV41) != 0 && 2830 stateidp->seqid == 0) || 2831 stateidp->seqid == stp->ls_stateid.seqid) && 2832 !NFSBCMP(stateidp->other, stp->ls_stateid.other, 2833 NFSX_STATEIDOTHER)) 2834 break; 2835 } 2836 if (stp == LIST_END(&lfp->lf_deleg) || 2837 ((new_stp->ls_flags & NFSLCK_WRITEACCESS) && 2838 (stp->ls_flags & NFSLCK_DELEGREAD))) { 2839 NFSUNLOCKSTATE(); 2840 printf("Nfsd openctrl unexpected expiry\n"); 2841 free(new_open, M_NFSDSTATE); 2842 free(new_deleg, M_NFSDSTATE); 2843 if (haslock) { 2844 NFSLOCKV4ROOTMUTEX(); 2845 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2846 NFSUNLOCKV4ROOTMUTEX(); 2847 } 2848 error = NFSERR_EXPIRED; 2849 goto out; 2850 } 2851 2852 /* 2853 * Don't issue a Delegation, since one already exists and 2854 * delay delegation timeout, as required. 2855 */ 2856 delegate = 0; 2857 nfsrv_delaydelegtimeout(stp); 2858 } 2859 2860 /* 2861 * Check for access/deny bit conflicts. I also check for the 2862 * same owner, since the client might not have bothered to check. 2863 * Also, note an open for the same file and owner, if found, 2864 * which is all we do here for Delegate_Cur, since conflict 2865 * checking is already done. 2866 */ 2867 LIST_FOREACH(stp, &lfp->lf_open, ls_file) { 2868 if (ownerstp && stp->ls_openowner == ownerstp) 2869 openstp = stp; 2870 if (!(new_stp->ls_flags & NFSLCK_DELEGCUR)) { 2871 /* 2872 * If another client has the file open, the only 2873 * delegation that can be issued is a Read delegation 2874 * and only if it is a Read open with Deny none. 2875 */ 2876 if (clp != stp->ls_clp) { 2877 if ((stp->ls_flags & NFSLCK_SHAREBITS) == 2878 NFSLCK_READACCESS) 2879 writedeleg = 0; 2880 else 2881 delegate = 0; 2882 } 2883 if(((new_stp->ls_flags & NFSLCK_ACCESSBITS) & 2884 ((stp->ls_flags>>NFSLCK_SHIFT) & NFSLCK_ACCESSBITS))|| 2885 ((stp->ls_flags & NFSLCK_ACCESSBITS) & 2886 ((new_stp->ls_flags>>NFSLCK_SHIFT)&NFSLCK_ACCESSBITS))){ 2887 ret = nfsrv_clientconflict(stp->ls_clp,&haslock,vp,p); 2888 if (ret == 1) { 2889 /* 2890 * nfsrv_clientconflict() unlocks state 2891 * when it returns non-zero. 2892 */ 2893 free(new_open, M_NFSDSTATE); 2894 free(new_deleg, M_NFSDSTATE); 2895 openstp = NULL; 2896 goto tryagain; 2897 } 2898 if (ret == 2) 2899 error = NFSERR_PERM; 2900 else if (new_stp->ls_flags & NFSLCK_RECLAIM) 2901 error = NFSERR_RECLAIMCONFLICT; 2902 else 2903 error = NFSERR_SHAREDENIED; 2904 if (ret == 0) 2905 NFSUNLOCKSTATE(); 2906 if (haslock) { 2907 NFSLOCKV4ROOTMUTEX(); 2908 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2909 NFSUNLOCKV4ROOTMUTEX(); 2910 } 2911 free(new_open, M_NFSDSTATE); 2912 free(new_deleg, M_NFSDSTATE); 2913 printf("nfsd openctrl unexpected client cnfl\n"); 2914 goto out; 2915 } 2916 } 2917 } 2918 2919 /* 2920 * Check for a conflicting delegation. If one is found, call 2921 * nfsrv_delegconflict() to handle it. If the v4root lock hasn't 2922 * been set yet, it will get the lock. Otherwise, it will recall 2923 * the delegation. Then, we try try again... 2924 * (If NFSLCK_DELEGCUR is set, it has a delegation, so there 2925 * isn't a conflict.) 2926 * I currently believe the conflict algorithm to be: 2927 * For Open with Read Access and Deny None 2928 * - there is a conflict iff a different client has a write delegation 2929 * For Open with other Write Access or any Deny except None 2930 * - there is a conflict if a different client has any delegation 2931 * - there is a conflict if the same client has a read delegation 2932 * (The current consensus is that this last case should be 2933 * considered a conflict since the client with a read delegation 2934 * could have done an Open with ReadAccess and WriteDeny 2935 * locally and then not have checked for the WriteDeny.) 2936 */ 2937 if (!(new_stp->ls_flags & (NFSLCK_DELEGPREV | NFSLCK_DELEGCUR))) { 2938 stp = LIST_FIRST(&lfp->lf_deleg); 2939 while (stp != LIST_END(&lfp->lf_deleg)) { 2940 nstp = LIST_NEXT(stp, ls_file); 2941 if (stp->ls_clp != clp && (stp->ls_flags & NFSLCK_DELEGREAD)) 2942 writedeleg = 0; 2943 else 2944 delegate = 0; 2945 if ((readonly && stp->ls_clp != clp && 2946 (stp->ls_flags & NFSLCK_DELEGWRITE)) || 2947 (!readonly && (stp->ls_clp != clp || 2948 (stp->ls_flags & NFSLCK_DELEGREAD)))) { 2949 if (new_stp->ls_flags & NFSLCK_RECLAIM) { 2950 delegate = 2; 2951 } else { 2952 ret = nfsrv_delegconflict(stp, &haslock, p, vp); 2953 if (ret) { 2954 /* 2955 * nfsrv_delegconflict() unlocks state 2956 * when it returns non-zero. 2957 */ 2958 printf("Nfsd openctrl unexpected deleg cnfl\n"); 2959 free(new_open, M_NFSDSTATE); 2960 free(new_deleg, M_NFSDSTATE); 2961 if (ret == -1) { 2962 openstp = NULL; 2963 goto tryagain; 2964 } 2965 error = ret; 2966 goto out; 2967 } 2968 } 2969 } 2970 stp = nstp; 2971 } 2972 } 2973 2974 /* 2975 * We only get here if there was no open that conflicted. 2976 * If an open for the owner exists, or in the access/deny bits. 2977 * Otherwise it is a new open. If the open_owner hasn't been 2978 * confirmed, replace the open with the new one needing confirmation, 2979 * otherwise add the open. 2980 */ 2981 if (new_stp->ls_flags & NFSLCK_DELEGPREV) { 2982 /* 2983 * Handle NFSLCK_DELEGPREV by searching the old delegations for 2984 * a match. If found, just move the old delegation to the current 2985 * delegation list and issue open. If not found, return 2986 * NFSERR_EXPIRED. 2987 */ 2988 LIST_FOREACH(stp, &clp->lc_olddeleg, ls_list) { 2989 if (stp->ls_lfp == lfp) { 2990 /* Found it */ 2991 if (stp->ls_clp != clp) 2992 panic("olddeleg clp"); 2993 LIST_REMOVE(stp, ls_list); 2994 LIST_REMOVE(stp, ls_hash); 2995 stp->ls_flags &= ~NFSLCK_OLDDELEG; 2996 stp->ls_stateid.seqid = delegstateidp->seqid = 1; 2997 stp->ls_stateid.other[0] = delegstateidp->other[0] = 2998 clp->lc_clientid.lval[0]; 2999 stp->ls_stateid.other[1] = delegstateidp->other[1] = 3000 clp->lc_clientid.lval[1]; 3001 stp->ls_stateid.other[2] = delegstateidp->other[2] = 3002 nfsrv_nextstateindex(clp); 3003 stp->ls_compref = nd->nd_compref; 3004 LIST_INSERT_HEAD(&clp->lc_deleg, stp, ls_list); 3005 LIST_INSERT_HEAD(NFSSTATEHASH(clp, 3006 stp->ls_stateid), stp, ls_hash); 3007 if (stp->ls_flags & NFSLCK_DELEGWRITE) 3008 *rflagsp |= NFSV4OPEN_WRITEDELEGATE; 3009 else 3010 *rflagsp |= NFSV4OPEN_READDELEGATE; 3011 clp->lc_delegtime = NFSD_MONOSEC + 3012 nfsrv_lease + NFSRV_LEASEDELTA; 3013 3014 /* 3015 * Now, do the associated open. 3016 */ 3017 new_open->ls_stateid.seqid = 1; 3018 new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0]; 3019 new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1]; 3020 new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp); 3021 new_open->ls_flags = (new_stp->ls_flags&NFSLCK_DENYBITS)| 3022 NFSLCK_OPEN; 3023 if (stp->ls_flags & NFSLCK_DELEGWRITE) 3024 new_open->ls_flags |= (NFSLCK_READACCESS | 3025 NFSLCK_WRITEACCESS); 3026 else 3027 new_open->ls_flags |= NFSLCK_READACCESS; 3028 new_open->ls_uid = new_stp->ls_uid; 3029 new_open->ls_lfp = lfp; 3030 new_open->ls_clp = clp; 3031 LIST_INIT(&new_open->ls_open); 3032 LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file); 3033 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid), 3034 new_open, ls_hash); 3035 /* 3036 * and handle the open owner 3037 */ 3038 if (ownerstp) { 3039 new_open->ls_openowner = ownerstp; 3040 LIST_INSERT_HEAD(&ownerstp->ls_open,new_open,ls_list); 3041 } else { 3042 new_open->ls_openowner = new_stp; 3043 new_stp->ls_flags = 0; 3044 nfsrvd_refcache(new_stp->ls_op); 3045 new_stp->ls_noopens = 0; 3046 LIST_INIT(&new_stp->ls_open); 3047 LIST_INSERT_HEAD(&new_stp->ls_open, new_open, ls_list); 3048 LIST_INSERT_HEAD(&clp->lc_open, new_stp, ls_list); 3049 *new_stpp = NULL; 3050 NFSD_VNET(nfsstatsv1_p)->srvopenowners++; 3051 nfsrv_openpluslock++; 3052 } 3053 openstp = new_open; 3054 new_open = NULL; 3055 NFSD_VNET(nfsstatsv1_p)->srvopens++; 3056 nfsrv_openpluslock++; 3057 break; 3058 } 3059 } 3060 if (stp == LIST_END(&clp->lc_olddeleg)) 3061 error = NFSERR_EXPIRED; 3062 } else if (new_stp->ls_flags & (NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) { 3063 /* 3064 * Scan to see that no delegation for this client and file 3065 * doesn't already exist. 3066 * There also shouldn't yet be an Open for this file and 3067 * openowner. 3068 */ 3069 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) { 3070 if (stp->ls_clp == clp) 3071 break; 3072 } 3073 if (stp == LIST_END(&lfp->lf_deleg) && openstp == NULL) { 3074 /* 3075 * This is the Claim_Previous case with a delegation 3076 * type != Delegate_None. 3077 */ 3078 /* 3079 * First, add the delegation. (Although we must issue the 3080 * delegation, we can also ask for an immediate return.) 3081 */ 3082 new_deleg->ls_stateid.seqid = delegstateidp->seqid = 1; 3083 new_deleg->ls_stateid.other[0] = delegstateidp->other[0] = 3084 clp->lc_clientid.lval[0]; 3085 new_deleg->ls_stateid.other[1] = delegstateidp->other[1] = 3086 clp->lc_clientid.lval[1]; 3087 new_deleg->ls_stateid.other[2] = delegstateidp->other[2] = 3088 nfsrv_nextstateindex(clp); 3089 if (new_stp->ls_flags & NFSLCK_DELEGWRITE) { 3090 new_deleg->ls_flags = (NFSLCK_DELEGWRITE | 3091 NFSLCK_READACCESS | NFSLCK_WRITEACCESS); 3092 *rflagsp |= NFSV4OPEN_WRITEDELEGATE; 3093 nfsrv_writedelegcnt++; 3094 } else { 3095 new_deleg->ls_flags = (NFSLCK_DELEGREAD | 3096 NFSLCK_READACCESS); 3097 *rflagsp |= NFSV4OPEN_READDELEGATE; 3098 } 3099 new_deleg->ls_uid = new_stp->ls_uid; 3100 new_deleg->ls_lfp = lfp; 3101 new_deleg->ls_clp = clp; 3102 new_deleg->ls_filerev = filerev; 3103 new_deleg->ls_compref = nd->nd_compref; 3104 new_deleg->ls_lastrecall = 0; 3105 LIST_INSERT_HEAD(&lfp->lf_deleg, new_deleg, ls_file); 3106 LIST_INSERT_HEAD(NFSSTATEHASH(clp, 3107 new_deleg->ls_stateid), new_deleg, ls_hash); 3108 LIST_INSERT_HEAD(&clp->lc_deleg, new_deleg, ls_list); 3109 new_deleg = NULL; 3110 if (delegate == 2 || nfsrv_issuedelegs == 0 || 3111 (clp->lc_flags & (LCL_CALLBACKSON | LCL_CBDOWN)) != 3112 LCL_CALLBACKSON || 3113 NFSRV_V4DELEGLIMIT(nfsrv_delegatecnt) || 3114 !NFSVNO_DELEGOK(vp)) 3115 *rflagsp |= NFSV4OPEN_RECALL; 3116 NFSD_VNET(nfsstatsv1_p)->srvdelegates++; 3117 nfsrv_openpluslock++; 3118 nfsrv_delegatecnt++; 3119 3120 /* 3121 * Now, do the associated open. 3122 */ 3123 new_open->ls_stateid.seqid = 1; 3124 new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0]; 3125 new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1]; 3126 new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp); 3127 new_open->ls_flags = (new_stp->ls_flags & NFSLCK_DENYBITS) | 3128 NFSLCK_OPEN; 3129 if (new_stp->ls_flags & NFSLCK_DELEGWRITE) 3130 new_open->ls_flags |= (NFSLCK_READACCESS | 3131 NFSLCK_WRITEACCESS); 3132 else 3133 new_open->ls_flags |= NFSLCK_READACCESS; 3134 new_open->ls_uid = new_stp->ls_uid; 3135 new_open->ls_lfp = lfp; 3136 new_open->ls_clp = clp; 3137 LIST_INIT(&new_open->ls_open); 3138 LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file); 3139 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid), 3140 new_open, ls_hash); 3141 /* 3142 * and handle the open owner 3143 */ 3144 if (ownerstp) { 3145 new_open->ls_openowner = ownerstp; 3146 LIST_INSERT_HEAD(&ownerstp->ls_open, new_open, ls_list); 3147 } else { 3148 new_open->ls_openowner = new_stp; 3149 new_stp->ls_flags = 0; 3150 nfsrvd_refcache(new_stp->ls_op); 3151 new_stp->ls_noopens = 0; 3152 LIST_INIT(&new_stp->ls_open); 3153 LIST_INSERT_HEAD(&new_stp->ls_open, new_open, ls_list); 3154 LIST_INSERT_HEAD(&clp->lc_open, new_stp, ls_list); 3155 *new_stpp = NULL; 3156 NFSD_VNET(nfsstatsv1_p)->srvopenowners++; 3157 nfsrv_openpluslock++; 3158 } 3159 openstp = new_open; 3160 new_open = NULL; 3161 NFSD_VNET(nfsstatsv1_p)->srvopens++; 3162 nfsrv_openpluslock++; 3163 } else { 3164 error = NFSERR_RECLAIMCONFLICT; 3165 } 3166 } else if (ownerstp) { 3167 if (ownerstp->ls_flags & NFSLCK_NEEDSCONFIRM) { 3168 /* Replace the open */ 3169 if (ownerstp->ls_op) 3170 nfsrvd_derefcache(ownerstp->ls_op); 3171 ownerstp->ls_op = new_stp->ls_op; 3172 nfsrvd_refcache(ownerstp->ls_op); 3173 ownerstp->ls_seq = new_stp->ls_seq; 3174 *rflagsp |= NFSV4OPEN_RESULTCONFIRM; 3175 stp = LIST_FIRST(&ownerstp->ls_open); 3176 stp->ls_flags = (new_stp->ls_flags & NFSLCK_SHAREBITS) | 3177 NFSLCK_OPEN; 3178 stp->ls_stateid.seqid = 1; 3179 stp->ls_uid = new_stp->ls_uid; 3180 if (lfp != stp->ls_lfp) { 3181 LIST_REMOVE(stp, ls_file); 3182 LIST_INSERT_HEAD(&lfp->lf_open, stp, ls_file); 3183 stp->ls_lfp = lfp; 3184 } 3185 openstp = stp; 3186 } else if (openstp) { 3187 openstp->ls_flags |= (new_stp->ls_flags & NFSLCK_SHAREBITS); 3188 openstp->ls_stateid.seqid++; 3189 if ((nd->nd_flag & ND_NFSV41) != 0 && 3190 openstp->ls_stateid.seqid == 0) 3191 openstp->ls_stateid.seqid = 1; 3192 3193 /* 3194 * This is where we can choose to issue a delegation. 3195 */ 3196 if ((new_stp->ls_flags & NFSLCK_WANTNODELEG) != 0) 3197 *rflagsp |= NFSV4OPEN_WDNOTWANTED; 3198 else if (nfsrv_issuedelegs == 0) 3199 *rflagsp |= NFSV4OPEN_WDSUPPFTYPE; 3200 else if (NFSRV_V4DELEGLIMIT(nfsrv_delegatecnt)) 3201 *rflagsp |= NFSV4OPEN_WDRESOURCE; 3202 else if (delegate == 0 || writedeleg == 0 || 3203 NFSVNO_EXRDONLY(exp) || (readonly != 0 && 3204 nfsrv_writedelegifpos == 0) || 3205 !NFSVNO_DELEGOK(vp) || 3206 (new_stp->ls_flags & NFSLCK_WANTRDELEG) != 0 || 3207 (clp->lc_flags & (LCL_CALLBACKSON | LCL_CBDOWN)) != 3208 LCL_CALLBACKSON) 3209 *rflagsp |= NFSV4OPEN_WDCONTENTION; 3210 else { 3211 new_deleg->ls_stateid.seqid = delegstateidp->seqid = 1; 3212 new_deleg->ls_stateid.other[0] = delegstateidp->other[0] 3213 = clp->lc_clientid.lval[0]; 3214 new_deleg->ls_stateid.other[1] = delegstateidp->other[1] 3215 = clp->lc_clientid.lval[1]; 3216 new_deleg->ls_stateid.other[2] = delegstateidp->other[2] 3217 = nfsrv_nextstateindex(clp); 3218 new_deleg->ls_flags = (NFSLCK_DELEGWRITE | 3219 NFSLCK_READACCESS | NFSLCK_WRITEACCESS); 3220 *rflagsp |= NFSV4OPEN_WRITEDELEGATE; 3221 new_deleg->ls_uid = new_stp->ls_uid; 3222 new_deleg->ls_lfp = lfp; 3223 new_deleg->ls_clp = clp; 3224 new_deleg->ls_filerev = filerev; 3225 new_deleg->ls_compref = nd->nd_compref; 3226 new_deleg->ls_lastrecall = 0; 3227 nfsrv_writedelegcnt++; 3228 LIST_INSERT_HEAD(&lfp->lf_deleg, new_deleg, ls_file); 3229 LIST_INSERT_HEAD(NFSSTATEHASH(clp, 3230 new_deleg->ls_stateid), new_deleg, ls_hash); 3231 LIST_INSERT_HEAD(&clp->lc_deleg, new_deleg, ls_list); 3232 new_deleg = NULL; 3233 NFSD_VNET(nfsstatsv1_p)->srvdelegates++; 3234 nfsrv_openpluslock++; 3235 nfsrv_delegatecnt++; 3236 } 3237 } else { 3238 new_open->ls_stateid.seqid = 1; 3239 new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0]; 3240 new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1]; 3241 new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp); 3242 new_open->ls_flags = (new_stp->ls_flags & NFSLCK_SHAREBITS)| 3243 NFSLCK_OPEN; 3244 new_open->ls_uid = new_stp->ls_uid; 3245 new_open->ls_openowner = ownerstp; 3246 new_open->ls_lfp = lfp; 3247 new_open->ls_clp = clp; 3248 LIST_INIT(&new_open->ls_open); 3249 LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file); 3250 LIST_INSERT_HEAD(&ownerstp->ls_open, new_open, ls_list); 3251 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid), 3252 new_open, ls_hash); 3253 openstp = new_open; 3254 new_open = NULL; 3255 NFSD_VNET(nfsstatsv1_p)->srvopens++; 3256 nfsrv_openpluslock++; 3257 3258 /* 3259 * This is where we can choose to issue a delegation. 3260 */ 3261 if ((new_stp->ls_flags & NFSLCK_WANTNODELEG) != 0) 3262 *rflagsp |= NFSV4OPEN_WDNOTWANTED; 3263 else if (nfsrv_issuedelegs == 0) 3264 *rflagsp |= NFSV4OPEN_WDSUPPFTYPE; 3265 else if (NFSRV_V4DELEGLIMIT(nfsrv_delegatecnt)) 3266 *rflagsp |= NFSV4OPEN_WDRESOURCE; 3267 else if (delegate == 0 || (writedeleg == 0 && 3268 readonly == 0) || !NFSVNO_DELEGOK(vp) || 3269 (clp->lc_flags & (LCL_CALLBACKSON | LCL_CBDOWN)) != 3270 LCL_CALLBACKSON) 3271 *rflagsp |= NFSV4OPEN_WDCONTENTION; 3272 else { 3273 new_deleg->ls_stateid.seqid = delegstateidp->seqid = 1; 3274 new_deleg->ls_stateid.other[0] = delegstateidp->other[0] 3275 = clp->lc_clientid.lval[0]; 3276 new_deleg->ls_stateid.other[1] = delegstateidp->other[1] 3277 = clp->lc_clientid.lval[1]; 3278 new_deleg->ls_stateid.other[2] = delegstateidp->other[2] 3279 = nfsrv_nextstateindex(clp); 3280 if (writedeleg && !NFSVNO_EXRDONLY(exp) && 3281 (nfsrv_writedelegifpos || !readonly) && 3282 (new_stp->ls_flags & NFSLCK_WANTRDELEG) == 0) { 3283 new_deleg->ls_flags = (NFSLCK_DELEGWRITE | 3284 NFSLCK_READACCESS | NFSLCK_WRITEACCESS); 3285 *rflagsp |= NFSV4OPEN_WRITEDELEGATE; 3286 nfsrv_writedelegcnt++; 3287 } else { 3288 new_deleg->ls_flags = (NFSLCK_DELEGREAD | 3289 NFSLCK_READACCESS); 3290 *rflagsp |= NFSV4OPEN_READDELEGATE; 3291 } 3292 new_deleg->ls_uid = new_stp->ls_uid; 3293 new_deleg->ls_lfp = lfp; 3294 new_deleg->ls_clp = clp; 3295 new_deleg->ls_filerev = filerev; 3296 new_deleg->ls_compref = nd->nd_compref; 3297 new_deleg->ls_lastrecall = 0; 3298 LIST_INSERT_HEAD(&lfp->lf_deleg, new_deleg, ls_file); 3299 LIST_INSERT_HEAD(NFSSTATEHASH(clp, 3300 new_deleg->ls_stateid), new_deleg, ls_hash); 3301 LIST_INSERT_HEAD(&clp->lc_deleg, new_deleg, ls_list); 3302 new_deleg = NULL; 3303 NFSD_VNET(nfsstatsv1_p)->srvdelegates++; 3304 nfsrv_openpluslock++; 3305 nfsrv_delegatecnt++; 3306 } 3307 } 3308 } else { 3309 /* 3310 * New owner case. Start the open_owner sequence with a 3311 * Needs confirmation (unless a reclaim) and hang the 3312 * new open off it. 3313 */ 3314 new_open->ls_stateid.seqid = 1; 3315 new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0]; 3316 new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1]; 3317 new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp); 3318 new_open->ls_flags = (new_stp->ls_flags & NFSLCK_SHAREBITS) | 3319 NFSLCK_OPEN; 3320 new_open->ls_uid = new_stp->ls_uid; 3321 LIST_INIT(&new_open->ls_open); 3322 new_open->ls_openowner = new_stp; 3323 new_open->ls_lfp = lfp; 3324 new_open->ls_clp = clp; 3325 LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file); 3326 if (new_stp->ls_flags & NFSLCK_RECLAIM) { 3327 new_stp->ls_flags = 0; 3328 } else if ((nd->nd_flag & ND_NFSV41) != 0) { 3329 /* NFSv4.1 never needs confirmation. */ 3330 new_stp->ls_flags = 0; 3331 3332 /* 3333 * This is where we can choose to issue a delegation. 3334 */ 3335 if (delegate && nfsrv_issuedelegs && 3336 (writedeleg || readonly) && 3337 (clp->lc_flags & (LCL_CALLBACKSON | LCL_CBDOWN)) == 3338 LCL_CALLBACKSON && 3339 !NFSRV_V4DELEGLIMIT(nfsrv_delegatecnt) && 3340 NFSVNO_DELEGOK(vp) && 3341 ((nd->nd_flag & ND_NFSV41) == 0 || 3342 (new_stp->ls_flags & NFSLCK_WANTNODELEG) == 0)) { 3343 new_deleg->ls_stateid.seqid = 3344 delegstateidp->seqid = 1; 3345 new_deleg->ls_stateid.other[0] = 3346 delegstateidp->other[0] 3347 = clp->lc_clientid.lval[0]; 3348 new_deleg->ls_stateid.other[1] = 3349 delegstateidp->other[1] 3350 = clp->lc_clientid.lval[1]; 3351 new_deleg->ls_stateid.other[2] = 3352 delegstateidp->other[2] 3353 = nfsrv_nextstateindex(clp); 3354 if (writedeleg && !NFSVNO_EXRDONLY(exp) && 3355 (nfsrv_writedelegifpos || !readonly) && 3356 ((nd->nd_flag & ND_NFSV41) == 0 || 3357 (new_stp->ls_flags & NFSLCK_WANTRDELEG) == 3358 0)) { 3359 new_deleg->ls_flags = 3360 (NFSLCK_DELEGWRITE | 3361 NFSLCK_READACCESS | 3362 NFSLCK_WRITEACCESS); 3363 *rflagsp |= NFSV4OPEN_WRITEDELEGATE; 3364 nfsrv_writedelegcnt++; 3365 } else { 3366 new_deleg->ls_flags = 3367 (NFSLCK_DELEGREAD | 3368 NFSLCK_READACCESS); 3369 *rflagsp |= NFSV4OPEN_READDELEGATE; 3370 } 3371 new_deleg->ls_uid = new_stp->ls_uid; 3372 new_deleg->ls_lfp = lfp; 3373 new_deleg->ls_clp = clp; 3374 new_deleg->ls_filerev = filerev; 3375 new_deleg->ls_compref = nd->nd_compref; 3376 new_deleg->ls_lastrecall = 0; 3377 LIST_INSERT_HEAD(&lfp->lf_deleg, new_deleg, 3378 ls_file); 3379 LIST_INSERT_HEAD(NFSSTATEHASH(clp, 3380 new_deleg->ls_stateid), new_deleg, ls_hash); 3381 LIST_INSERT_HEAD(&clp->lc_deleg, new_deleg, 3382 ls_list); 3383 new_deleg = NULL; 3384 NFSD_VNET(nfsstatsv1_p)->srvdelegates++; 3385 nfsrv_openpluslock++; 3386 nfsrv_delegatecnt++; 3387 } 3388 /* 3389 * Since NFSv4.1 never does an OpenConfirm, the first 3390 * open state will be acquired here. 3391 */ 3392 if (!(clp->lc_flags & LCL_STAMPEDSTABLE)) { 3393 clp->lc_flags |= LCL_STAMPEDSTABLE; 3394 len = clp->lc_idlen; 3395 NFSBCOPY(clp->lc_id, clidp, len); 3396 gotstate = 1; 3397 } 3398 } else { 3399 *rflagsp |= NFSV4OPEN_RESULTCONFIRM; 3400 new_stp->ls_flags = NFSLCK_NEEDSCONFIRM; 3401 } 3402 nfsrvd_refcache(new_stp->ls_op); 3403 new_stp->ls_noopens = 0; 3404 LIST_INIT(&new_stp->ls_open); 3405 LIST_INSERT_HEAD(&new_stp->ls_open, new_open, ls_list); 3406 LIST_INSERT_HEAD(&clp->lc_open, new_stp, ls_list); 3407 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid), 3408 new_open, ls_hash); 3409 openstp = new_open; 3410 new_open = NULL; 3411 *new_stpp = NULL; 3412 NFSD_VNET(nfsstatsv1_p)->srvopens++; 3413 nfsrv_openpluslock++; 3414 NFSD_VNET(nfsstatsv1_p)->srvopenowners++; 3415 nfsrv_openpluslock++; 3416 } 3417 if (!error) { 3418 stateidp->seqid = openstp->ls_stateid.seqid; 3419 stateidp->other[0] = openstp->ls_stateid.other[0]; 3420 stateidp->other[1] = openstp->ls_stateid.other[1]; 3421 stateidp->other[2] = openstp->ls_stateid.other[2]; 3422 } 3423 NFSUNLOCKSTATE(); 3424 if (haslock) { 3425 NFSLOCKV4ROOTMUTEX(); 3426 nfsv4_unlock(&nfsv4rootfs_lock, 1); 3427 NFSUNLOCKV4ROOTMUTEX(); 3428 } 3429 if (new_open) 3430 free(new_open, M_NFSDSTATE); 3431 if (new_deleg) 3432 free(new_deleg, M_NFSDSTATE); 3433 3434 /* 3435 * If the NFSv4.1 client just acquired its first open, write a timestamp 3436 * to the stable storage file. 3437 */ 3438 if (gotstate != 0) { 3439 nfsrv_writestable(clidp, len, NFSNST_NEWSTATE, p); 3440 nfsrv_backupstable(); 3441 } 3442 3443 out: 3444 free(clidp, M_TEMP); 3445 NFSEXITCODE2(error, nd); 3446 return (error); 3447 } 3448 3449 /* 3450 * Open update. Does the confirm, downgrade and close. 3451 */ 3452 int 3453 nfsrv_openupdate(vnode_t vp, struct nfsstate *new_stp, nfsquad_t clientid, 3454 nfsv4stateid_t *stateidp, struct nfsrv_descript *nd, NFSPROC_T *p, 3455 int *retwriteaccessp) 3456 { 3457 struct nfsstate *stp; 3458 struct nfsclient *clp; 3459 struct nfslockfile *lfp; 3460 u_int32_t bits; 3461 int error = 0, gotstate = 0, len = 0; 3462 u_char *clidp = NULL; 3463 3464 /* 3465 * Check for restart conditions (client and server). 3466 */ 3467 error = nfsrv_checkrestart(clientid, new_stp->ls_flags, 3468 &new_stp->ls_stateid, 0); 3469 if (error) 3470 goto out; 3471 3472 clidp = malloc(NFSV4_OPAQUELIMIT, M_TEMP, M_WAITOK); 3473 NFSLOCKSTATE(); 3474 /* 3475 * Get the open structure via clientid and stateid. 3476 */ 3477 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 3478 (nfsquad_t)((u_quad_t)0), 0, nd, p); 3479 if (!error) 3480 error = nfsrv_getstate(clp, &new_stp->ls_stateid, 3481 new_stp->ls_flags, &stp); 3482 3483 /* 3484 * Sanity check the open. 3485 */ 3486 if (!error && (!(stp->ls_flags & NFSLCK_OPEN) || 3487 (!(new_stp->ls_flags & NFSLCK_CONFIRM) && 3488 (stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM)) || 3489 ((new_stp->ls_flags & NFSLCK_CONFIRM) && 3490 (!(stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM))))) 3491 error = NFSERR_BADSTATEID; 3492 3493 if (!error) 3494 error = nfsrv_checkseqid(nd, new_stp->ls_seq, 3495 stp->ls_openowner, new_stp->ls_op); 3496 if (!error && stp->ls_stateid.seqid != new_stp->ls_stateid.seqid && 3497 (((nd->nd_flag & ND_NFSV41) == 0 && 3498 !(new_stp->ls_flags & NFSLCK_CONFIRM)) || 3499 ((nd->nd_flag & ND_NFSV41) != 0 && 3500 new_stp->ls_stateid.seqid != 0))) 3501 error = NFSERR_OLDSTATEID; 3502 if (!error && vp->v_type != VREG) { 3503 if (vp->v_type == VDIR) 3504 error = NFSERR_ISDIR; 3505 else 3506 error = NFSERR_INVAL; 3507 } 3508 3509 if (error) { 3510 /* 3511 * If a client tries to confirm an Open with a bad 3512 * seqid# and there are no byte range locks or other Opens 3513 * on the openowner, just throw it away, so the next use of the 3514 * openowner will start a fresh seq#. 3515 */ 3516 if (error == NFSERR_BADSEQID && 3517 (new_stp->ls_flags & NFSLCK_CONFIRM) && 3518 nfsrv_nootherstate(stp)) 3519 nfsrv_freeopenowner(stp->ls_openowner, 0, p); 3520 NFSUNLOCKSTATE(); 3521 goto out; 3522 } 3523 3524 /* 3525 * Set the return stateid. 3526 */ 3527 stateidp->seqid = stp->ls_stateid.seqid + 1; 3528 if ((nd->nd_flag & ND_NFSV41) != 0 && stateidp->seqid == 0) 3529 stateidp->seqid = 1; 3530 stateidp->other[0] = stp->ls_stateid.other[0]; 3531 stateidp->other[1] = stp->ls_stateid.other[1]; 3532 stateidp->other[2] = stp->ls_stateid.other[2]; 3533 /* 3534 * Now, handle the three cases. 3535 */ 3536 if (new_stp->ls_flags & NFSLCK_CONFIRM) { 3537 /* 3538 * If the open doesn't need confirmation, it seems to me that 3539 * there is a client error, but I'll just log it and keep going? 3540 */ 3541 if (!(stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM)) 3542 printf("Nfsv4d: stray open confirm\n"); 3543 stp->ls_openowner->ls_flags = 0; 3544 stp->ls_stateid.seqid++; 3545 if ((nd->nd_flag & ND_NFSV41) != 0 && 3546 stp->ls_stateid.seqid == 0) 3547 stp->ls_stateid.seqid = 1; 3548 if (!(clp->lc_flags & LCL_STAMPEDSTABLE)) { 3549 clp->lc_flags |= LCL_STAMPEDSTABLE; 3550 len = clp->lc_idlen; 3551 NFSBCOPY(clp->lc_id, clidp, len); 3552 gotstate = 1; 3553 } 3554 NFSUNLOCKSTATE(); 3555 } else if (new_stp->ls_flags & NFSLCK_CLOSE) { 3556 lfp = stp->ls_lfp; 3557 if (retwriteaccessp != NULL) { 3558 if ((stp->ls_flags & NFSLCK_WRITEACCESS) != 0) 3559 *retwriteaccessp = 1; 3560 else 3561 *retwriteaccessp = 0; 3562 } 3563 if (nfsrv_dolocallocks != 0 && !LIST_EMPTY(&stp->ls_open)) { 3564 /* Get the lf lock */ 3565 nfsrv_locklf(lfp); 3566 NFSUNLOCKSTATE(); 3567 ASSERT_VOP_ELOCKED(vp, "nfsrv_openupdate"); 3568 NFSVOPUNLOCK(vp); 3569 if (nfsrv_freeopen(stp, vp, 1, p) == 0) { 3570 NFSLOCKSTATE(); 3571 nfsrv_unlocklf(lfp); 3572 NFSUNLOCKSTATE(); 3573 } 3574 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 3575 } else { 3576 (void) nfsrv_freeopen(stp, NULL, 0, p); 3577 NFSUNLOCKSTATE(); 3578 } 3579 } else { 3580 /* 3581 * Update the share bits, making sure that the new set are a 3582 * subset of the old ones. 3583 */ 3584 bits = (new_stp->ls_flags & NFSLCK_SHAREBITS); 3585 if (~(stp->ls_flags) & bits) { 3586 NFSUNLOCKSTATE(); 3587 error = NFSERR_INVAL; 3588 goto out; 3589 } 3590 stp->ls_flags = (bits | NFSLCK_OPEN); 3591 stp->ls_stateid.seqid++; 3592 if ((nd->nd_flag & ND_NFSV41) != 0 && 3593 stp->ls_stateid.seqid == 0) 3594 stp->ls_stateid.seqid = 1; 3595 NFSUNLOCKSTATE(); 3596 } 3597 3598 /* 3599 * If the client just confirmed its first open, write a timestamp 3600 * to the stable storage file. 3601 */ 3602 if (gotstate != 0) { 3603 nfsrv_writestable(clidp, len, NFSNST_NEWSTATE, p); 3604 nfsrv_backupstable(); 3605 } 3606 3607 out: 3608 free(clidp, M_TEMP); 3609 NFSEXITCODE2(error, nd); 3610 return (error); 3611 } 3612 3613 /* 3614 * Delegation update. Does the purge and return. 3615 */ 3616 int 3617 nfsrv_delegupdate(struct nfsrv_descript *nd, nfsquad_t clientid, 3618 nfsv4stateid_t *stateidp, vnode_t vp, int op, struct ucred *cred, 3619 NFSPROC_T *p, int *retwriteaccessp) 3620 { 3621 struct nfsstate *stp; 3622 struct nfsclient *clp; 3623 int error = 0; 3624 fhandle_t fh; 3625 3626 /* 3627 * Do a sanity check against the file handle for DelegReturn. 3628 */ 3629 if (vp) { 3630 error = nfsvno_getfh(vp, &fh, p); 3631 if (error) 3632 goto out; 3633 } 3634 /* 3635 * Check for restart conditions (client and server). 3636 */ 3637 if (op == NFSV4OP_DELEGRETURN) 3638 error = nfsrv_checkrestart(clientid, NFSLCK_DELEGRETURN, 3639 stateidp, 0); 3640 else 3641 error = nfsrv_checkrestart(clientid, NFSLCK_DELEGPURGE, 3642 stateidp, 0); 3643 3644 NFSLOCKSTATE(); 3645 /* 3646 * Get the open structure via clientid and stateid. 3647 */ 3648 if (!error) 3649 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 3650 (nfsquad_t)((u_quad_t)0), 0, nd, p); 3651 if (error) { 3652 if (error == NFSERR_CBPATHDOWN) 3653 error = 0; 3654 if (error == NFSERR_STALECLIENTID && op == NFSV4OP_DELEGRETURN) 3655 error = NFSERR_STALESTATEID; 3656 } 3657 if (!error && op == NFSV4OP_DELEGRETURN) { 3658 error = nfsrv_getstate(clp, stateidp, NFSLCK_DELEGRETURN, &stp); 3659 if (!error && stp->ls_stateid.seqid != stateidp->seqid && 3660 ((nd->nd_flag & ND_NFSV41) == 0 || stateidp->seqid != 0)) 3661 error = NFSERR_OLDSTATEID; 3662 } 3663 /* 3664 * NFSERR_EXPIRED means that the state has gone away, 3665 * so Delegations have been purged. Just return ok. 3666 */ 3667 if (error == NFSERR_EXPIRED && op == NFSV4OP_DELEGPURGE) { 3668 NFSUNLOCKSTATE(); 3669 error = 0; 3670 goto out; 3671 } 3672 if (error) { 3673 NFSUNLOCKSTATE(); 3674 goto out; 3675 } 3676 3677 if (op == NFSV4OP_DELEGRETURN) { 3678 if (NFSBCMP((caddr_t)&fh, (caddr_t)&stp->ls_lfp->lf_fh, 3679 sizeof (fhandle_t))) { 3680 NFSUNLOCKSTATE(); 3681 error = NFSERR_BADSTATEID; 3682 goto out; 3683 } 3684 if (retwriteaccessp != NULL) { 3685 if ((stp->ls_flags & NFSLCK_DELEGWRITE) != 0) 3686 *retwriteaccessp = 1; 3687 else 3688 *retwriteaccessp = 0; 3689 } 3690 nfsrv_freedeleg(stp); 3691 } else { 3692 nfsrv_freedeleglist(&clp->lc_olddeleg); 3693 } 3694 NFSUNLOCKSTATE(); 3695 error = 0; 3696 3697 out: 3698 NFSEXITCODE(error); 3699 return (error); 3700 } 3701 3702 /* 3703 * Release lock owner. 3704 */ 3705 int 3706 nfsrv_releaselckown(struct nfsstate *new_stp, nfsquad_t clientid, 3707 NFSPROC_T *p) 3708 { 3709 struct nfsstate *stp, *nstp, *openstp, *ownstp; 3710 struct nfsclient *clp; 3711 int error = 0; 3712 3713 /* 3714 * Check for restart conditions (client and server). 3715 */ 3716 error = nfsrv_checkrestart(clientid, new_stp->ls_flags, 3717 &new_stp->ls_stateid, 0); 3718 if (error) 3719 goto out; 3720 3721 NFSLOCKSTATE(); 3722 /* 3723 * Get the lock owner by name. 3724 */ 3725 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 3726 (nfsquad_t)((u_quad_t)0), 0, NULL, p); 3727 if (error) { 3728 NFSUNLOCKSTATE(); 3729 goto out; 3730 } 3731 LIST_FOREACH(ownstp, &clp->lc_open, ls_list) { 3732 LIST_FOREACH(openstp, &ownstp->ls_open, ls_list) { 3733 stp = LIST_FIRST(&openstp->ls_open); 3734 while (stp != LIST_END(&openstp->ls_open)) { 3735 nstp = LIST_NEXT(stp, ls_list); 3736 /* 3737 * If the owner matches, check for locks and 3738 * then free or return an error. 3739 */ 3740 if (stp->ls_ownerlen == new_stp->ls_ownerlen && 3741 !NFSBCMP(stp->ls_owner, new_stp->ls_owner, 3742 stp->ls_ownerlen)){ 3743 if (LIST_EMPTY(&stp->ls_lock)) { 3744 nfsrv_freelockowner(stp, NULL, 0, p); 3745 } else { 3746 NFSUNLOCKSTATE(); 3747 error = NFSERR_LOCKSHELD; 3748 goto out; 3749 } 3750 } 3751 stp = nstp; 3752 } 3753 } 3754 } 3755 NFSUNLOCKSTATE(); 3756 3757 out: 3758 NFSEXITCODE(error); 3759 return (error); 3760 } 3761 3762 /* 3763 * Get the file handle for a lock structure. 3764 */ 3765 static int 3766 nfsrv_getlockfh(vnode_t vp, u_short flags, struct nfslockfile *new_lfp, 3767 fhandle_t *nfhp, NFSPROC_T *p) 3768 { 3769 fhandle_t *fhp = NULL; 3770 int error; 3771 3772 /* 3773 * For lock, use the new nfslock structure, otherwise just 3774 * a fhandle_t on the stack. 3775 */ 3776 if (flags & NFSLCK_OPEN) { 3777 KASSERT(new_lfp != NULL, ("nfsrv_getlockfh: new_lfp NULL")); 3778 fhp = &new_lfp->lf_fh; 3779 } else if (nfhp) { 3780 fhp = nfhp; 3781 } else { 3782 panic("nfsrv_getlockfh"); 3783 } 3784 error = nfsvno_getfh(vp, fhp, p); 3785 NFSEXITCODE(error); 3786 return (error); 3787 } 3788 3789 /* 3790 * Get an nfs lock structure. Allocate one, as required, and return a 3791 * pointer to it. 3792 * Returns an NFSERR_xxx upon failure or -1 to indicate no current lock. 3793 */ 3794 static int 3795 nfsrv_getlockfile(u_short flags, struct nfslockfile **new_lfpp, 3796 struct nfslockfile **lfpp, fhandle_t *nfhp, int lockit) 3797 { 3798 struct nfslockfile *lfp; 3799 fhandle_t *fhp = NULL, *tfhp; 3800 struct nfslockhashhead *hp; 3801 struct nfslockfile *new_lfp = NULL; 3802 3803 /* 3804 * For lock, use the new nfslock structure, otherwise just 3805 * a fhandle_t on the stack. 3806 */ 3807 if (flags & NFSLCK_OPEN) { 3808 new_lfp = *new_lfpp; 3809 fhp = &new_lfp->lf_fh; 3810 } else if (nfhp) { 3811 fhp = nfhp; 3812 } else { 3813 panic("nfsrv_getlockfile"); 3814 } 3815 3816 hp = NFSLOCKHASH(fhp); 3817 LIST_FOREACH(lfp, hp, lf_hash) { 3818 tfhp = &lfp->lf_fh; 3819 if (NFSVNO_CMPFH(fhp, tfhp)) { 3820 if (lockit) 3821 nfsrv_locklf(lfp); 3822 *lfpp = lfp; 3823 return (0); 3824 } 3825 } 3826 if (!(flags & NFSLCK_OPEN)) 3827 return (-1); 3828 3829 /* 3830 * No match, so chain the new one into the list. 3831 */ 3832 LIST_INIT(&new_lfp->lf_open); 3833 LIST_INIT(&new_lfp->lf_lock); 3834 LIST_INIT(&new_lfp->lf_deleg); 3835 LIST_INIT(&new_lfp->lf_locallock); 3836 LIST_INIT(&new_lfp->lf_rollback); 3837 new_lfp->lf_locallock_lck.nfslock_usecnt = 0; 3838 new_lfp->lf_locallock_lck.nfslock_lock = 0; 3839 new_lfp->lf_usecount = 0; 3840 LIST_INSERT_HEAD(hp, new_lfp, lf_hash); 3841 *lfpp = new_lfp; 3842 *new_lfpp = NULL; 3843 return (0); 3844 } 3845 3846 /* 3847 * This function adds a nfslock lock structure to the list for the associated 3848 * nfsstate and nfslockfile structures. It will be inserted after the 3849 * entry pointed at by insert_lop. 3850 */ 3851 static void 3852 nfsrv_insertlock(struct nfslock *new_lop, struct nfslock *insert_lop, 3853 struct nfsstate *stp, struct nfslockfile *lfp) 3854 { 3855 struct nfslock *lop, *nlop; 3856 3857 new_lop->lo_stp = stp; 3858 new_lop->lo_lfp = lfp; 3859 3860 if (stp != NULL) { 3861 /* Insert in increasing lo_first order */ 3862 lop = LIST_FIRST(&lfp->lf_lock); 3863 if (lop == LIST_END(&lfp->lf_lock) || 3864 new_lop->lo_first <= lop->lo_first) { 3865 LIST_INSERT_HEAD(&lfp->lf_lock, new_lop, lo_lckfile); 3866 } else { 3867 nlop = LIST_NEXT(lop, lo_lckfile); 3868 while (nlop != LIST_END(&lfp->lf_lock) && 3869 nlop->lo_first < new_lop->lo_first) { 3870 lop = nlop; 3871 nlop = LIST_NEXT(lop, lo_lckfile); 3872 } 3873 LIST_INSERT_AFTER(lop, new_lop, lo_lckfile); 3874 } 3875 } else { 3876 new_lop->lo_lckfile.le_prev = NULL; /* list not used */ 3877 } 3878 3879 /* 3880 * Insert after insert_lop, which is overloaded as stp or lfp for 3881 * an empty list. 3882 */ 3883 if (stp == NULL && (struct nfslockfile *)insert_lop == lfp) 3884 LIST_INSERT_HEAD(&lfp->lf_locallock, new_lop, lo_lckowner); 3885 else if ((struct nfsstate *)insert_lop == stp) 3886 LIST_INSERT_HEAD(&stp->ls_lock, new_lop, lo_lckowner); 3887 else 3888 LIST_INSERT_AFTER(insert_lop, new_lop, lo_lckowner); 3889 if (stp != NULL) { 3890 NFSD_VNET(nfsstatsv1_p)->srvlocks++; 3891 nfsrv_openpluslock++; 3892 } 3893 } 3894 3895 /* 3896 * This function updates the locking for a lock owner and given file. It 3897 * maintains a list of lock ranges ordered on increasing file offset that 3898 * are NFSLCK_READ or NFSLCK_WRITE and non-overlapping (aka POSIX style). 3899 * It always adds new_lop to the list and sometimes uses the one pointed 3900 * at by other_lopp. 3901 */ 3902 static void 3903 nfsrv_updatelock(struct nfsstate *stp, struct nfslock **new_lopp, 3904 struct nfslock **other_lopp, struct nfslockfile *lfp) 3905 { 3906 struct nfslock *new_lop = *new_lopp; 3907 struct nfslock *lop, *tlop, *ilop; 3908 struct nfslock *other_lop = *other_lopp; 3909 int unlock = 0, myfile = 0; 3910 u_int64_t tmp; 3911 3912 /* 3913 * Work down the list until the lock is merged. 3914 */ 3915 if (new_lop->lo_flags & NFSLCK_UNLOCK) 3916 unlock = 1; 3917 if (stp != NULL) { 3918 ilop = (struct nfslock *)stp; 3919 lop = LIST_FIRST(&stp->ls_lock); 3920 } else { 3921 ilop = (struct nfslock *)lfp; 3922 lop = LIST_FIRST(&lfp->lf_locallock); 3923 } 3924 while (lop != NULL) { 3925 /* 3926 * Only check locks for this file that aren't before the start of 3927 * new lock's range. 3928 */ 3929 if (lop->lo_lfp == lfp) { 3930 myfile = 1; 3931 if (lop->lo_end >= new_lop->lo_first) { 3932 if (new_lop->lo_end < lop->lo_first) { 3933 /* 3934 * If the new lock ends before the start of the 3935 * current lock's range, no merge, just insert 3936 * the new lock. 3937 */ 3938 break; 3939 } 3940 if (new_lop->lo_flags == lop->lo_flags || 3941 (new_lop->lo_first <= lop->lo_first && 3942 new_lop->lo_end >= lop->lo_end)) { 3943 /* 3944 * This lock can be absorbed by the new lock/unlock. 3945 * This happens when it covers the entire range 3946 * of the old lock or is contiguous 3947 * with the old lock and is of the same type or an 3948 * unlock. 3949 */ 3950 if (lop->lo_first < new_lop->lo_first) 3951 new_lop->lo_first = lop->lo_first; 3952 if (lop->lo_end > new_lop->lo_end) 3953 new_lop->lo_end = lop->lo_end; 3954 tlop = lop; 3955 lop = LIST_NEXT(lop, lo_lckowner); 3956 nfsrv_freenfslock(tlop); 3957 continue; 3958 } 3959 3960 /* 3961 * All these cases are for contiguous locks that are not the 3962 * same type, so they can't be merged. 3963 */ 3964 if (new_lop->lo_first <= lop->lo_first) { 3965 /* 3966 * This case is where the new lock overlaps with the 3967 * first part of the old lock. Move the start of the 3968 * old lock to just past the end of the new lock. The 3969 * new lock will be inserted in front of the old, since 3970 * ilop hasn't been updated. (We are done now.) 3971 */ 3972 lop->lo_first = new_lop->lo_end; 3973 break; 3974 } 3975 if (new_lop->lo_end >= lop->lo_end) { 3976 /* 3977 * This case is where the new lock overlaps with the 3978 * end of the old lock's range. Move the old lock's 3979 * end to just before the new lock's first and insert 3980 * the new lock after the old lock. 3981 * Might not be done yet, since the new lock could 3982 * overlap further locks with higher ranges. 3983 */ 3984 lop->lo_end = new_lop->lo_first; 3985 ilop = lop; 3986 lop = LIST_NEXT(lop, lo_lckowner); 3987 continue; 3988 } 3989 /* 3990 * The final case is where the new lock's range is in the 3991 * middle of the current lock's and splits the current lock 3992 * up. Use *other_lopp to handle the second part of the 3993 * split old lock range. (We are done now.) 3994 * For unlock, we use new_lop as other_lop and tmp, since 3995 * other_lop and new_lop are the same for this case. 3996 * We noted the unlock case above, so we don't need 3997 * new_lop->lo_flags any longer. 3998 */ 3999 tmp = new_lop->lo_first; 4000 if (other_lop == NULL) { 4001 if (!unlock) 4002 panic("nfsd srv update unlock"); 4003 other_lop = new_lop; 4004 *new_lopp = NULL; 4005 } 4006 other_lop->lo_first = new_lop->lo_end; 4007 other_lop->lo_end = lop->lo_end; 4008 other_lop->lo_flags = lop->lo_flags; 4009 other_lop->lo_stp = stp; 4010 other_lop->lo_lfp = lfp; 4011 lop->lo_end = tmp; 4012 nfsrv_insertlock(other_lop, lop, stp, lfp); 4013 *other_lopp = NULL; 4014 ilop = lop; 4015 break; 4016 } 4017 } 4018 ilop = lop; 4019 lop = LIST_NEXT(lop, lo_lckowner); 4020 if (myfile && (lop == NULL || lop->lo_lfp != lfp)) 4021 break; 4022 } 4023 4024 /* 4025 * Insert the new lock in the list at the appropriate place. 4026 */ 4027 if (!unlock) { 4028 nfsrv_insertlock(new_lop, ilop, stp, lfp); 4029 *new_lopp = NULL; 4030 } 4031 } 4032 4033 /* 4034 * This function handles sequencing of locks, etc. 4035 * It returns an error that indicates what the caller should do. 4036 */ 4037 static int 4038 nfsrv_checkseqid(struct nfsrv_descript *nd, u_int32_t seqid, 4039 struct nfsstate *stp, struct nfsrvcache *op) 4040 { 4041 int error = 0; 4042 4043 if ((nd->nd_flag & ND_NFSV41) != 0) 4044 /* NFSv4.1 ignores the open_seqid and lock_seqid. */ 4045 goto out; 4046 if (op != nd->nd_rp) 4047 panic("nfsrvstate checkseqid"); 4048 if (!(op->rc_flag & RC_INPROG)) 4049 panic("nfsrvstate not inprog"); 4050 if (stp->ls_op && stp->ls_op->rc_refcnt <= 0) { 4051 printf("refcnt=%d\n", stp->ls_op->rc_refcnt); 4052 panic("nfsrvstate op refcnt"); 4053 } 4054 4055 /* If ND_ERELOOKUP is set, the seqid has already been handled. */ 4056 if ((nd->nd_flag & ND_ERELOOKUP) != 0) 4057 goto out; 4058 4059 if ((stp->ls_seq + 1) == seqid) { 4060 if (stp->ls_op) 4061 nfsrvd_derefcache(stp->ls_op); 4062 stp->ls_op = op; 4063 nfsrvd_refcache(op); 4064 stp->ls_seq = seqid; 4065 goto out; 4066 } else if (stp->ls_seq == seqid && stp->ls_op && 4067 op->rc_xid == stp->ls_op->rc_xid && 4068 op->rc_refcnt == 0 && 4069 op->rc_reqlen == stp->ls_op->rc_reqlen && 4070 op->rc_cksum == stp->ls_op->rc_cksum) { 4071 if (stp->ls_op->rc_flag & RC_INPROG) { 4072 error = NFSERR_DONTREPLY; 4073 goto out; 4074 } 4075 nd->nd_rp = stp->ls_op; 4076 nd->nd_rp->rc_flag |= RC_INPROG; 4077 nfsrvd_delcache(op); 4078 error = NFSERR_REPLYFROMCACHE; 4079 goto out; 4080 } 4081 error = NFSERR_BADSEQID; 4082 4083 out: 4084 NFSEXITCODE2(error, nd); 4085 return (error); 4086 } 4087 4088 /* 4089 * Get the client ip address for callbacks. If the strings can't be parsed, 4090 * just set lc_program to 0 to indicate no callbacks are possible. 4091 * (For cases where the address can't be parsed or is 0.0.0.0.0.0, set 4092 * the address to the client's transport address. This won't be used 4093 * for callbacks, but can be printed out by nfsstats for info.) 4094 * Return error if the xdr can't be parsed, 0 otherwise. 4095 */ 4096 int 4097 nfsrv_getclientipaddr(struct nfsrv_descript *nd, struct nfsclient *clp) 4098 { 4099 u_int32_t *tl; 4100 u_char *cp, *cp2; 4101 int i, j, maxalen = 0, minalen = 0; 4102 sa_family_t af; 4103 #ifdef INET 4104 struct sockaddr_in *rin = NULL, *sin; 4105 #endif 4106 #ifdef INET6 4107 struct sockaddr_in6 *rin6 = NULL, *sin6; 4108 #endif 4109 u_char *addr; 4110 int error = 0, cantparse = 0; 4111 union { 4112 in_addr_t ival; 4113 u_char cval[4]; 4114 } ip; 4115 union { 4116 in_port_t sval; 4117 u_char cval[2]; 4118 } port; 4119 4120 /* 8 is the maximum length of the port# string. */ 4121 addr = malloc(INET6_ADDRSTRLEN + 8, M_TEMP, M_WAITOK); 4122 clp->lc_req.nr_client = NULL; 4123 clp->lc_req.nr_lock = 0; 4124 af = AF_UNSPEC; 4125 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 4126 i = fxdr_unsigned(int, *tl); 4127 if (i >= 3 && i <= 4) { 4128 error = nfsrv_mtostr(nd, addr, i); 4129 if (error) 4130 goto nfsmout; 4131 #ifdef INET 4132 if (!strcmp(addr, "tcp")) { 4133 clp->lc_flags |= LCL_TCPCALLBACK; 4134 clp->lc_req.nr_sotype = SOCK_STREAM; 4135 clp->lc_req.nr_soproto = IPPROTO_TCP; 4136 af = AF_INET; 4137 } else if (!strcmp(addr, "udp")) { 4138 clp->lc_req.nr_sotype = SOCK_DGRAM; 4139 clp->lc_req.nr_soproto = IPPROTO_UDP; 4140 af = AF_INET; 4141 } 4142 #endif 4143 #ifdef INET6 4144 if (af == AF_UNSPEC) { 4145 if (!strcmp(addr, "tcp6")) { 4146 clp->lc_flags |= LCL_TCPCALLBACK; 4147 clp->lc_req.nr_sotype = SOCK_STREAM; 4148 clp->lc_req.nr_soproto = IPPROTO_TCP; 4149 af = AF_INET6; 4150 } else if (!strcmp(addr, "udp6")) { 4151 clp->lc_req.nr_sotype = SOCK_DGRAM; 4152 clp->lc_req.nr_soproto = IPPROTO_UDP; 4153 af = AF_INET6; 4154 } 4155 } 4156 #endif 4157 if (af == AF_UNSPEC) { 4158 cantparse = 1; 4159 } 4160 } else { 4161 cantparse = 1; 4162 if (i > 0) { 4163 error = nfsm_advance(nd, NFSM_RNDUP(i), -1); 4164 if (error) 4165 goto nfsmout; 4166 } 4167 } 4168 /* 4169 * The caller has allocated clp->lc_req.nr_nam to be large enough 4170 * for either AF_INET or AF_INET6 and zeroed out the contents. 4171 * maxalen is set to the maximum length of the host IP address string 4172 * plus 8 for the maximum length of the port#. 4173 * minalen is set to the minimum length of the host IP address string 4174 * plus 4 for the minimum length of the port#. 4175 * These lengths do not include NULL termination, 4176 * so INET[6]_ADDRSTRLEN - 1 is used in the calculations. 4177 */ 4178 switch (af) { 4179 #ifdef INET 4180 case AF_INET: 4181 rin = (struct sockaddr_in *)clp->lc_req.nr_nam; 4182 rin->sin_family = AF_INET; 4183 rin->sin_len = sizeof(struct sockaddr_in); 4184 maxalen = INET_ADDRSTRLEN - 1 + 8; 4185 minalen = 7 + 4; 4186 break; 4187 #endif 4188 #ifdef INET6 4189 case AF_INET6: 4190 rin6 = (struct sockaddr_in6 *)clp->lc_req.nr_nam; 4191 rin6->sin6_family = AF_INET6; 4192 rin6->sin6_len = sizeof(struct sockaddr_in6); 4193 maxalen = INET6_ADDRSTRLEN - 1 + 8; 4194 minalen = 3 + 4; 4195 break; 4196 #endif 4197 } 4198 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 4199 i = fxdr_unsigned(int, *tl); 4200 if (i < 0) { 4201 error = NFSERR_BADXDR; 4202 goto nfsmout; 4203 } else if (i == 0) { 4204 cantparse = 1; 4205 } else if (!cantparse && i <= maxalen && i >= minalen) { 4206 error = nfsrv_mtostr(nd, addr, i); 4207 if (error) 4208 goto nfsmout; 4209 4210 /* 4211 * Parse out the address fields. We expect 6 decimal numbers 4212 * separated by '.'s for AF_INET and two decimal numbers 4213 * preceeded by '.'s for AF_INET6. 4214 */ 4215 cp = NULL; 4216 switch (af) { 4217 #ifdef INET6 4218 /* 4219 * For AF_INET6, first parse the host address. 4220 */ 4221 case AF_INET6: 4222 cp = strchr(addr, '.'); 4223 if (cp != NULL) { 4224 *cp++ = '\0'; 4225 if (inet_pton(af, addr, &rin6->sin6_addr) == 1) 4226 i = 4; 4227 else { 4228 cp = NULL; 4229 cantparse = 1; 4230 } 4231 } 4232 break; 4233 #endif 4234 #ifdef INET 4235 case AF_INET: 4236 cp = addr; 4237 i = 0; 4238 break; 4239 #endif 4240 } 4241 while (cp != NULL && *cp && i < 6) { 4242 cp2 = cp; 4243 while (*cp2 && *cp2 != '.') 4244 cp2++; 4245 if (*cp2) 4246 *cp2++ = '\0'; 4247 else if (i != 5) { 4248 cantparse = 1; 4249 break; 4250 } 4251 j = nfsrv_getipnumber(cp); 4252 if (j >= 0) { 4253 if (i < 4) 4254 ip.cval[3 - i] = j; 4255 else 4256 port.cval[5 - i] = j; 4257 } else { 4258 cantparse = 1; 4259 break; 4260 } 4261 cp = cp2; 4262 i++; 4263 } 4264 if (!cantparse) { 4265 /* 4266 * The host address INADDR_ANY is (mis)used to indicate 4267 * "there is no valid callback address". 4268 */ 4269 switch (af) { 4270 #ifdef INET6 4271 case AF_INET6: 4272 if (!IN6_ARE_ADDR_EQUAL(&rin6->sin6_addr, 4273 &in6addr_any)) 4274 rin6->sin6_port = htons(port.sval); 4275 else 4276 cantparse = 1; 4277 break; 4278 #endif 4279 #ifdef INET 4280 case AF_INET: 4281 if (ip.ival != INADDR_ANY) { 4282 rin->sin_addr.s_addr = htonl(ip.ival); 4283 rin->sin_port = htons(port.sval); 4284 } else { 4285 cantparse = 1; 4286 } 4287 break; 4288 #endif 4289 } 4290 } 4291 } else { 4292 cantparse = 1; 4293 if (i > 0) { 4294 error = nfsm_advance(nd, NFSM_RNDUP(i), -1); 4295 if (error) 4296 goto nfsmout; 4297 } 4298 } 4299 if (cantparse) { 4300 switch (nd->nd_nam->sa_family) { 4301 #ifdef INET 4302 case AF_INET: 4303 sin = (struct sockaddr_in *)nd->nd_nam; 4304 rin = (struct sockaddr_in *)clp->lc_req.nr_nam; 4305 rin->sin_family = AF_INET; 4306 rin->sin_len = sizeof(struct sockaddr_in); 4307 rin->sin_addr.s_addr = sin->sin_addr.s_addr; 4308 rin->sin_port = 0x0; 4309 break; 4310 #endif 4311 #ifdef INET6 4312 case AF_INET6: 4313 sin6 = (struct sockaddr_in6 *)nd->nd_nam; 4314 rin6 = (struct sockaddr_in6 *)clp->lc_req.nr_nam; 4315 rin6->sin6_family = AF_INET6; 4316 rin6->sin6_len = sizeof(struct sockaddr_in6); 4317 rin6->sin6_addr = sin6->sin6_addr; 4318 rin6->sin6_port = 0x0; 4319 break; 4320 #endif 4321 } 4322 clp->lc_program = 0; 4323 } 4324 nfsmout: 4325 free(addr, M_TEMP); 4326 NFSEXITCODE2(error, nd); 4327 return (error); 4328 } 4329 4330 /* 4331 * Turn a string of up to three decimal digits into a number. Return -1 upon 4332 * error. 4333 */ 4334 static int 4335 nfsrv_getipnumber(u_char *cp) 4336 { 4337 int i = 0, j = 0; 4338 4339 while (*cp) { 4340 if (j > 2 || *cp < '0' || *cp > '9') 4341 return (-1); 4342 i *= 10; 4343 i += (*cp - '0'); 4344 cp++; 4345 j++; 4346 } 4347 if (i < 256) 4348 return (i); 4349 return (-1); 4350 } 4351 4352 /* 4353 * This function checks for restart conditions. 4354 */ 4355 static int 4356 nfsrv_checkrestart(nfsquad_t clientid, u_int32_t flags, 4357 nfsv4stateid_t *stateidp, int specialid) 4358 { 4359 int ret = 0; 4360 4361 /* 4362 * First check for a server restart. Open, LockT, ReleaseLockOwner 4363 * and DelegPurge have a clientid, the rest a stateid. 4364 */ 4365 if (flags & 4366 (NFSLCK_OPEN | NFSLCK_TEST | NFSLCK_RELEASE | NFSLCK_DELEGPURGE)) { 4367 if (clientid.lval[0] != NFSD_VNET(nfsrvboottime)) { 4368 ret = NFSERR_STALECLIENTID; 4369 goto out; 4370 } 4371 } else if (stateidp->other[0] != NFSD_VNET(nfsrvboottime) && 4372 specialid == 0) { 4373 ret = NFSERR_STALESTATEID; 4374 goto out; 4375 } 4376 4377 /* 4378 * Read, Write, Setattr and LockT can return NFSERR_GRACE and do 4379 * not use a lock/open owner seqid#, so the check can be done now. 4380 * (The others will be checked, as required, later.) 4381 */ 4382 if (!(flags & (NFSLCK_CHECK | NFSLCK_TEST))) 4383 goto out; 4384 4385 NFSLOCKSTATE(); 4386 ret = nfsrv_checkgrace(NULL, NULL, flags); 4387 NFSUNLOCKSTATE(); 4388 4389 out: 4390 NFSEXITCODE(ret); 4391 return (ret); 4392 } 4393 4394 /* 4395 * Check for grace. 4396 */ 4397 static int 4398 nfsrv_checkgrace(struct nfsrv_descript *nd, struct nfsclient *clp, 4399 u_int32_t flags) 4400 { 4401 int error = 0, notreclaimed; 4402 struct nfsrv_stable *sp; 4403 4404 if ((NFSD_VNET(nfsrv_stablefirst).nsf_flags & (NFSNSF_UPDATEDONE | 4405 NFSNSF_GRACEOVER)) == 0) { 4406 /* 4407 * First, check to see if all of the clients have done a 4408 * ReclaimComplete. If so, grace can end now. 4409 */ 4410 notreclaimed = 0; 4411 LIST_FOREACH(sp, &NFSD_VNET(nfsrv_stablefirst).nsf_head, 4412 nst_list) { 4413 if ((sp->nst_flag & NFSNST_RECLAIMED) == 0) { 4414 notreclaimed = 1; 4415 break; 4416 } 4417 } 4418 if (notreclaimed == 0) 4419 NFSD_VNET(nfsrv_stablefirst).nsf_flags |= 4420 (NFSNSF_GRACEOVER | NFSNSF_NEEDLOCK); 4421 } 4422 4423 if ((NFSD_VNET(nfsrv_stablefirst).nsf_flags & NFSNSF_GRACEOVER) != 0) { 4424 if (flags & NFSLCK_RECLAIM) { 4425 error = NFSERR_NOGRACE; 4426 goto out; 4427 } 4428 } else { 4429 if (!(flags & NFSLCK_RECLAIM)) { 4430 error = NFSERR_GRACE; 4431 goto out; 4432 } 4433 if (nd != NULL && clp != NULL && 4434 (nd->nd_flag & ND_NFSV41) != 0 && 4435 (clp->lc_flags & LCL_RECLAIMCOMPLETE) != 0) { 4436 error = NFSERR_NOGRACE; 4437 goto out; 4438 } 4439 4440 /* 4441 * If grace is almost over and we are still getting Reclaims, 4442 * extend grace a bit. 4443 */ 4444 if ((NFSD_MONOSEC + NFSRV_LEASEDELTA) > 4445 NFSD_VNET(nfsrv_stablefirst).nsf_eograce) 4446 NFSD_VNET(nfsrv_stablefirst).nsf_eograce = 4447 NFSD_MONOSEC + NFSRV_LEASEDELTA; 4448 } 4449 4450 out: 4451 NFSEXITCODE(error); 4452 return (error); 4453 } 4454 4455 /* 4456 * Do a server callback. 4457 * The "trunc" argument is slightly overloaded and refers to different 4458 * boolean arguments for CBRECALL and CBLAYOUTRECALL. 4459 */ 4460 static int 4461 nfsrv_docallback(struct nfsclient *clp, int procnum, nfsv4stateid_t *stateidp, 4462 int trunc, fhandle_t *fhp, struct nfsvattr *nap, nfsattrbit_t *attrbitp, 4463 int laytype, NFSPROC_T *p) 4464 { 4465 struct mbuf *m; 4466 u_int32_t *tl; 4467 struct nfsrv_descript *nd; 4468 struct ucred *cred; 4469 int error = 0, slotpos; 4470 u_int32_t callback; 4471 struct nfsdsession *sep = NULL; 4472 uint64_t tval; 4473 bool dotls; 4474 4475 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 4476 cred = newnfs_getcred(); 4477 NFSLOCKSTATE(); /* mostly for lc_cbref++ */ 4478 if (clp->lc_flags & LCL_NEEDSCONFIRM) { 4479 NFSUNLOCKSTATE(); 4480 panic("docallb"); 4481 } 4482 clp->lc_cbref++; 4483 4484 /* 4485 * Fill the callback program# and version into the request 4486 * structure for newnfs_connect() to use. 4487 */ 4488 clp->lc_req.nr_prog = clp->lc_program; 4489 #ifdef notnow 4490 if ((clp->lc_flags & LCL_NFSV41) != 0) 4491 clp->lc_req.nr_vers = NFSV41_CBVERS; 4492 else 4493 #endif 4494 clp->lc_req.nr_vers = NFSV4_CBVERS; 4495 4496 /* 4497 * First, fill in some of the fields of nd and cr. 4498 */ 4499 nd->nd_flag = ND_NFSV4; 4500 if (clp->lc_flags & LCL_GSS) 4501 nd->nd_flag |= ND_KERBV; 4502 if ((clp->lc_flags & LCL_NFSV41) != 0) 4503 nd->nd_flag |= ND_NFSV41; 4504 if ((clp->lc_flags & LCL_NFSV42) != 0) 4505 nd->nd_flag |= ND_NFSV42; 4506 nd->nd_repstat = 0; 4507 cred->cr_uid = clp->lc_uid; 4508 cred->cr_gid = clp->lc_gid; 4509 callback = clp->lc_callback; 4510 NFSUNLOCKSTATE(); 4511 cred->cr_ngroups = 1; 4512 4513 /* 4514 * Get the first mbuf for the request. 4515 */ 4516 MGET(m, M_WAITOK, MT_DATA); 4517 m->m_len = 0; 4518 nd->nd_mreq = nd->nd_mb = m; 4519 nd->nd_bpos = mtod(m, caddr_t); 4520 4521 /* 4522 * and build the callback request. 4523 */ 4524 if (procnum == NFSV4OP_CBGETATTR) { 4525 nd->nd_procnum = NFSV4PROC_CBCOMPOUND; 4526 error = nfsrv_cbcallargs(nd, clp, callback, NFSV4OP_CBGETATTR, 4527 "CB Getattr", &sep, &slotpos); 4528 if (error != 0) { 4529 m_freem(nd->nd_mreq); 4530 goto errout; 4531 } 4532 (void)nfsm_fhtom(NULL, nd, (u_int8_t *)fhp, NFSX_MYFH, 0); 4533 (void)nfsrv_putattrbit(nd, attrbitp); 4534 } else if (procnum == NFSV4OP_CBRECALL) { 4535 nd->nd_procnum = NFSV4PROC_CBCOMPOUND; 4536 error = nfsrv_cbcallargs(nd, clp, callback, NFSV4OP_CBRECALL, 4537 "CB Recall", &sep, &slotpos); 4538 if (error != 0) { 4539 m_freem(nd->nd_mreq); 4540 goto errout; 4541 } 4542 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_STATEID); 4543 *tl++ = txdr_unsigned(stateidp->seqid); 4544 NFSBCOPY((caddr_t)stateidp->other, (caddr_t)tl, 4545 NFSX_STATEIDOTHER); 4546 tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED); 4547 if (trunc) 4548 *tl = newnfs_true; 4549 else 4550 *tl = newnfs_false; 4551 (void)nfsm_fhtom(NULL, nd, (u_int8_t *)fhp, NFSX_MYFH, 0); 4552 } else if (procnum == NFSV4OP_CBLAYOUTRECALL) { 4553 NFSD_DEBUG(4, "docallback layout recall\n"); 4554 nd->nd_procnum = NFSV4PROC_CBCOMPOUND; 4555 error = nfsrv_cbcallargs(nd, clp, callback, 4556 NFSV4OP_CBLAYOUTRECALL, "CB Reclayout", &sep, &slotpos); 4557 NFSD_DEBUG(4, "aft cbcallargs=%d\n", error); 4558 if (error != 0) { 4559 m_freem(nd->nd_mreq); 4560 goto errout; 4561 } 4562 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 4563 *tl++ = txdr_unsigned(laytype); 4564 *tl++ = txdr_unsigned(NFSLAYOUTIOMODE_ANY); 4565 if (trunc) 4566 *tl++ = newnfs_true; 4567 else 4568 *tl++ = newnfs_false; 4569 *tl = txdr_unsigned(NFSV4LAYOUTRET_FILE); 4570 (void)nfsm_fhtom(NULL, nd, (uint8_t *)fhp, NFSX_MYFH, 0); 4571 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_HYPER + NFSX_STATEID); 4572 tval = 0; 4573 txdr_hyper(tval, tl); tl += 2; 4574 tval = UINT64_MAX; 4575 txdr_hyper(tval, tl); tl += 2; 4576 *tl++ = txdr_unsigned(stateidp->seqid); 4577 NFSBCOPY(stateidp->other, tl, NFSX_STATEIDOTHER); 4578 tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED); 4579 NFSD_DEBUG(4, "aft args\n"); 4580 } else if (procnum == NFSV4PROC_CBNULL) { 4581 nd->nd_procnum = NFSV4PROC_CBNULL; 4582 if ((clp->lc_flags & LCL_NFSV41) != 0) { 4583 error = nfsv4_getcbsession(clp, &sep); 4584 if (error != 0) { 4585 m_freem(nd->nd_mreq); 4586 goto errout; 4587 } 4588 } 4589 } else { 4590 error = NFSERR_SERVERFAULT; 4591 m_freem(nd->nd_mreq); 4592 goto errout; 4593 } 4594 4595 /* 4596 * Call newnfs_connect(), as required, and then newnfs_request(). 4597 */ 4598 dotls = false; 4599 if ((clp->lc_flags & LCL_TLSCB) != 0) 4600 dotls = true; 4601 (void) newnfs_sndlock(&clp->lc_req.nr_lock); 4602 if (clp->lc_req.nr_client == NULL) { 4603 if ((clp->lc_flags & LCL_NFSV41) != 0) { 4604 error = ECONNREFUSED; 4605 if (procnum != NFSV4PROC_CBNULL) 4606 nfsv4_freeslot(&sep->sess_cbsess, slotpos, 4607 true); 4608 nfsrv_freesession(sep, NULL); 4609 } else if (nd->nd_procnum == NFSV4PROC_CBNULL) 4610 error = newnfs_connect(NULL, &clp->lc_req, cred, 4611 NULL, 1, dotls, &clp->lc_req.nr_client); 4612 else 4613 error = newnfs_connect(NULL, &clp->lc_req, cred, 4614 NULL, 3, dotls, &clp->lc_req.nr_client); 4615 } 4616 newnfs_sndunlock(&clp->lc_req.nr_lock); 4617 NFSD_DEBUG(4, "aft sndunlock=%d\n", error); 4618 if (!error) { 4619 if ((nd->nd_flag & ND_NFSV41) != 0) { 4620 KASSERT(sep != NULL, ("sep NULL")); 4621 if (sep->sess_cbsess.nfsess_xprt != NULL) 4622 error = newnfs_request(nd, NULL, clp, 4623 &clp->lc_req, NULL, NULL, cred, 4624 clp->lc_program, clp->lc_req.nr_vers, NULL, 4625 1, NULL, &sep->sess_cbsess); 4626 else { 4627 /* 4628 * This should probably never occur, but if a 4629 * client somehow does an RPC without a 4630 * SequenceID Op that causes a callback just 4631 * after the nfsd threads have been terminated 4632 * and restared we could conceivably get here 4633 * without a backchannel xprt. 4634 */ 4635 printf("nfsrv_docallback: no xprt\n"); 4636 error = ECONNREFUSED; 4637 } 4638 NFSD_DEBUG(4, "aft newnfs_request=%d\n", error); 4639 if (error != 0 && procnum != NFSV4PROC_CBNULL) { 4640 /* 4641 * It is likely that the callback was never 4642 * processed by the client and, as such, 4643 * the sequence# for the session slot needs 4644 * to be backed up by one to avoid a 4645 * NFSERR_SEQMISORDERED error reply. 4646 * For the unlikely case where the callback 4647 * was processed by the client, this will 4648 * make the next callback on the slot 4649 * appear to be a retry. 4650 * Since callbacks never specify that the 4651 * reply be cached, this "apparent retry" 4652 * should not be a problem. 4653 */ 4654 nfsv4_freeslot(&sep->sess_cbsess, slotpos, 4655 true); 4656 } 4657 nfsrv_freesession(sep, NULL); 4658 } else 4659 error = newnfs_request(nd, NULL, clp, &clp->lc_req, 4660 NULL, NULL, cred, clp->lc_program, 4661 clp->lc_req.nr_vers, NULL, 1, NULL, NULL); 4662 } 4663 errout: 4664 NFSFREECRED(cred); 4665 4666 /* 4667 * If error is set here, the Callback path isn't working 4668 * properly, so twiddle the appropriate LCL_ flags. 4669 * (nd_repstat != 0 indicates the Callback path is working, 4670 * but the callback failed on the client.) 4671 */ 4672 if (error) { 4673 /* 4674 * Mark the callback pathway down, which disabled issuing 4675 * of delegations and gets Renew to return NFSERR_CBPATHDOWN. 4676 */ 4677 NFSLOCKSTATE(); 4678 clp->lc_flags |= LCL_CBDOWN; 4679 NFSUNLOCKSTATE(); 4680 } else { 4681 /* 4682 * Callback worked. If the callback path was down, disable 4683 * callbacks, so no more delegations will be issued. (This 4684 * is done on the assumption that the callback pathway is 4685 * flakey.) 4686 */ 4687 NFSLOCKSTATE(); 4688 if (clp->lc_flags & LCL_CBDOWN) 4689 clp->lc_flags &= ~(LCL_CBDOWN | LCL_CALLBACKSON); 4690 NFSUNLOCKSTATE(); 4691 if (nd->nd_repstat) { 4692 error = nd->nd_repstat; 4693 NFSD_DEBUG(1, "nfsrv_docallback op=%d err=%d\n", 4694 procnum, error); 4695 } else if (error == 0 && procnum == NFSV4OP_CBGETATTR) 4696 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, 4697 NULL, NULL, NULL, NULL, NULL, 0, NULL, NULL, NULL, 4698 p, NULL); 4699 m_freem(nd->nd_mrep); 4700 } 4701 NFSLOCKSTATE(); 4702 clp->lc_cbref--; 4703 if ((clp->lc_flags & LCL_WAKEUPWANTED) && clp->lc_cbref == 0) { 4704 clp->lc_flags &= ~LCL_WAKEUPWANTED; 4705 wakeup(clp); 4706 } 4707 NFSUNLOCKSTATE(); 4708 4709 free(nd, M_TEMP); 4710 NFSEXITCODE(error); 4711 return (error); 4712 } 4713 4714 /* 4715 * Set up the compound RPC for the callback. 4716 */ 4717 static int 4718 nfsrv_cbcallargs(struct nfsrv_descript *nd, struct nfsclient *clp, 4719 uint32_t callback, int op, const char *optag, struct nfsdsession **sepp, 4720 int *slotposp) 4721 { 4722 uint32_t *tl; 4723 int error, len; 4724 4725 len = strlen(optag); 4726 (void)nfsm_strtom(nd, optag, len); 4727 NFSM_BUILD(tl, uint32_t *, 4 * NFSX_UNSIGNED); 4728 if ((nd->nd_flag & ND_NFSV41) != 0) { 4729 if ((nd->nd_flag & ND_NFSV42) != 0) 4730 *tl++ = txdr_unsigned(NFSV42_MINORVERSION); 4731 else 4732 *tl++ = txdr_unsigned(NFSV41_MINORVERSION); 4733 *tl++ = txdr_unsigned(callback); 4734 *tl++ = txdr_unsigned(2); 4735 *tl = txdr_unsigned(NFSV4OP_CBSEQUENCE); 4736 error = nfsv4_setcbsequence(nd, clp, 1, sepp, slotposp); 4737 if (error != 0) 4738 return (error); 4739 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 4740 *tl = txdr_unsigned(op); 4741 } else { 4742 *tl++ = txdr_unsigned(NFSV4_MINORVERSION); 4743 *tl++ = txdr_unsigned(callback); 4744 *tl++ = txdr_unsigned(1); 4745 *tl = txdr_unsigned(op); 4746 } 4747 return (0); 4748 } 4749 4750 /* 4751 * Return the next index# for a clientid. Mostly just increment and return 4752 * the next one, but... if the 32bit unsigned does actually wrap around, 4753 * it should be rebooted. 4754 * At an average rate of one new client per second, it will wrap around in 4755 * approximately 136 years. (I think the server will have been shut 4756 * down or rebooted before then.) 4757 */ 4758 static u_int32_t 4759 nfsrv_nextclientindex(void) 4760 { 4761 static u_int32_t client_index = 0; 4762 4763 client_index++; 4764 if (client_index != 0) 4765 return (client_index); 4766 4767 printf("%s: out of clientids\n", __func__); 4768 return (client_index); 4769 } 4770 4771 /* 4772 * Return the next index# for a stateid. Mostly just increment and return 4773 * the next one, but... if the 32bit unsigned does actually wrap around 4774 * (will a BSD server stay up that long?), find 4775 * new start and end values. 4776 */ 4777 static u_int32_t 4778 nfsrv_nextstateindex(struct nfsclient *clp) 4779 { 4780 struct nfsstate *stp; 4781 int i; 4782 u_int32_t canuse, min_index, max_index; 4783 4784 if (!(clp->lc_flags & LCL_INDEXNOTOK)) { 4785 clp->lc_stateindex++; 4786 if (clp->lc_stateindex != clp->lc_statemaxindex) 4787 return (clp->lc_stateindex); 4788 } 4789 4790 /* 4791 * Yuck, we've hit the end. 4792 * Look for a new min and max. 4793 */ 4794 min_index = 0; 4795 max_index = 0xffffffff; 4796 for (i = 0; i < nfsrv_statehashsize; i++) { 4797 LIST_FOREACH(stp, &clp->lc_stateid[i], ls_hash) { 4798 if (stp->ls_stateid.other[2] > 0x80000000) { 4799 if (stp->ls_stateid.other[2] < max_index) 4800 max_index = stp->ls_stateid.other[2]; 4801 } else { 4802 if (stp->ls_stateid.other[2] > min_index) 4803 min_index = stp->ls_stateid.other[2]; 4804 } 4805 } 4806 } 4807 4808 /* 4809 * Yikes, highly unlikely, but I'll handle it anyhow. 4810 */ 4811 if (min_index == 0x80000000 && max_index == 0x80000001) { 4812 canuse = 0; 4813 /* 4814 * Loop around until we find an unused entry. Return that 4815 * and set LCL_INDEXNOTOK, so the search will continue next time. 4816 * (This is one of those rare cases where a goto is the 4817 * cleanest way to code the loop.) 4818 */ 4819 tryagain: 4820 for (i = 0; i < nfsrv_statehashsize; i++) { 4821 LIST_FOREACH(stp, &clp->lc_stateid[i], ls_hash) { 4822 if (stp->ls_stateid.other[2] == canuse) { 4823 canuse++; 4824 goto tryagain; 4825 } 4826 } 4827 } 4828 clp->lc_flags |= LCL_INDEXNOTOK; 4829 return (canuse); 4830 } 4831 4832 /* 4833 * Ok to start again from min + 1. 4834 */ 4835 clp->lc_stateindex = min_index + 1; 4836 clp->lc_statemaxindex = max_index; 4837 clp->lc_flags &= ~LCL_INDEXNOTOK; 4838 return (clp->lc_stateindex); 4839 } 4840 4841 /* 4842 * The following functions handle the stable storage file that deals with 4843 * the edge conditions described in RFC3530 Sec. 8.6.3. 4844 * The file is as follows: 4845 * - a single record at the beginning that has the lease time of the 4846 * previous server instance (before the last reboot) and the nfsrvboottime 4847 * values for the previous server boots. 4848 * These previous boot times are used to ensure that the current 4849 * nfsrvboottime does not, somehow, get set to a previous one. 4850 * (This is important so that Stale ClientIDs and StateIDs can 4851 * be recognized.) 4852 * The number of previous nfsvrboottime values precedes the list. 4853 * - followed by some number of appended records with: 4854 * - client id string 4855 * - flag that indicates it is a record revoking state via lease 4856 * expiration or similar 4857 * OR has successfully acquired state. 4858 * These structures vary in length, with the client string at the end, up 4859 * to NFSV4_OPAQUELIMIT in size. 4860 * 4861 * At the end of the grace period, the file is truncated, the first 4862 * record is rewritten with updated information and any acquired state 4863 * records for successful reclaims of state are written. 4864 * 4865 * Subsequent records are appended when the first state is issued to 4866 * a client and when state is revoked for a client. 4867 * 4868 * When reading the file in, state issued records that come later in 4869 * the file override older ones, since the append log is in cronological order. 4870 * If, for some reason, the file can't be read, the grace period is 4871 * immediately terminated and all reclaims get NFSERR_NOGRACE. 4872 */ 4873 4874 /* 4875 * Read in the stable storage file. Called by nfssvc() before the nfsd 4876 * processes start servicing requests. 4877 */ 4878 void 4879 nfsrv_setupstable(NFSPROC_T *p) 4880 { 4881 struct nfsrv_stablefirst *sf = &NFSD_VNET(nfsrv_stablefirst); 4882 struct nfsrv_stable *sp, *nsp; 4883 struct nfst_rec *tsp; 4884 int error, i, tryagain; 4885 off_t off = 0; 4886 ssize_t aresid, len; 4887 4888 /* 4889 * If NFSNSF_UPDATEDONE is set, this is a restart of the nfsds without 4890 * a reboot, so state has not been lost. 4891 */ 4892 if (sf->nsf_flags & NFSNSF_UPDATEDONE) 4893 return; 4894 /* 4895 * Set Grace over just until the file reads successfully. 4896 */ 4897 NFSD_VNET(nfsrvboottime) = time_second; 4898 LIST_INIT(&sf->nsf_head); 4899 sf->nsf_flags = (NFSNSF_GRACEOVER | NFSNSF_NEEDLOCK); 4900 sf->nsf_eograce = NFSD_MONOSEC + NFSRV_LEASEDELTA; 4901 if (sf->nsf_fp == NULL) 4902 return; 4903 error = NFSD_RDWR(UIO_READ, NFSFPVNODE(sf->nsf_fp), 4904 (caddr_t)&sf->nsf_rec, sizeof (struct nfsf_rec), off, UIO_SYSSPACE, 4905 0, NFSFPCRED(sf->nsf_fp), &aresid, p); 4906 if (error || aresid || sf->nsf_numboots == 0 || 4907 sf->nsf_numboots > NFSNSF_MAXNUMBOOTS) 4908 return; 4909 4910 /* 4911 * Now, read in the boottimes. 4912 */ 4913 sf->nsf_bootvals = (time_t *)malloc((sf->nsf_numboots + 1) * 4914 sizeof(time_t), M_TEMP, M_WAITOK); 4915 off = sizeof (struct nfsf_rec); 4916 error = NFSD_RDWR(UIO_READ, NFSFPVNODE(sf->nsf_fp), 4917 (caddr_t)sf->nsf_bootvals, sf->nsf_numboots * sizeof (time_t), off, 4918 UIO_SYSSPACE, 0, NFSFPCRED(sf->nsf_fp), &aresid, p); 4919 if (error || aresid) { 4920 free(sf->nsf_bootvals, M_TEMP); 4921 sf->nsf_bootvals = NULL; 4922 return; 4923 } 4924 4925 /* 4926 * Make sure this nfsrvboottime is different from all recorded 4927 * previous ones. 4928 */ 4929 do { 4930 tryagain = 0; 4931 for (i = 0; i < sf->nsf_numboots; i++) { 4932 if (NFSD_VNET(nfsrvboottime) == sf->nsf_bootvals[i]) { 4933 NFSD_VNET(nfsrvboottime)++; 4934 tryagain = 1; 4935 break; 4936 } 4937 } 4938 } while (tryagain); 4939 4940 sf->nsf_flags |= NFSNSF_OK; 4941 off += (sf->nsf_numboots * sizeof (time_t)); 4942 4943 /* 4944 * Read through the file, building a list of records for grace 4945 * checking. 4946 * Each record is between sizeof (struct nfst_rec) and 4947 * sizeof (struct nfst_rec) + NFSV4_OPAQUELIMIT - 1 4948 * and is actually sizeof (struct nfst_rec) + nst_len - 1. 4949 */ 4950 tsp = (struct nfst_rec *)malloc(sizeof (struct nfst_rec) + 4951 NFSV4_OPAQUELIMIT - 1, M_TEMP, M_WAITOK); 4952 do { 4953 error = NFSD_RDWR(UIO_READ, NFSFPVNODE(sf->nsf_fp), 4954 (caddr_t)tsp, sizeof (struct nfst_rec) + NFSV4_OPAQUELIMIT - 1, 4955 off, UIO_SYSSPACE, 0, NFSFPCRED(sf->nsf_fp), &aresid, p); 4956 len = (sizeof (struct nfst_rec) + NFSV4_OPAQUELIMIT - 1) - aresid; 4957 if (error || (len > 0 && (len < sizeof (struct nfst_rec) || 4958 len < (sizeof (struct nfst_rec) + tsp->len - 1)))) { 4959 /* 4960 * Yuck, the file has been corrupted, so just return 4961 * after clearing out any restart state, so the grace period 4962 * is over. 4963 */ 4964 LIST_FOREACH_SAFE(sp, &sf->nsf_head, nst_list, nsp) { 4965 LIST_REMOVE(sp, nst_list); 4966 free(sp, M_TEMP); 4967 } 4968 free(tsp, M_TEMP); 4969 sf->nsf_flags &= ~NFSNSF_OK; 4970 free(sf->nsf_bootvals, M_TEMP); 4971 sf->nsf_bootvals = NULL; 4972 return; 4973 } 4974 if (len > 0) { 4975 off += sizeof (struct nfst_rec) + tsp->len - 1; 4976 /* 4977 * Search the list for a matching client. 4978 */ 4979 LIST_FOREACH(sp, &sf->nsf_head, nst_list) { 4980 if (tsp->len == sp->nst_len && 4981 !NFSBCMP(tsp->client, sp->nst_client, tsp->len)) 4982 break; 4983 } 4984 if (sp == LIST_END(&sf->nsf_head)) { 4985 sp = (struct nfsrv_stable *)malloc(tsp->len + 4986 sizeof (struct nfsrv_stable) - 1, M_TEMP, 4987 M_WAITOK); 4988 NFSBCOPY((caddr_t)tsp, (caddr_t)&sp->nst_rec, 4989 sizeof (struct nfst_rec) + tsp->len - 1); 4990 LIST_INSERT_HEAD(&sf->nsf_head, sp, nst_list); 4991 } else { 4992 if (tsp->flag == NFSNST_REVOKE) 4993 sp->nst_flag |= NFSNST_REVOKE; 4994 else 4995 /* 4996 * A subsequent timestamp indicates the client 4997 * did a setclientid/confirm and any previous 4998 * revoke is no longer relevant. 4999 */ 5000 sp->nst_flag &= ~NFSNST_REVOKE; 5001 } 5002 } 5003 } while (len > 0); 5004 free(tsp, M_TEMP); 5005 sf->nsf_flags = NFSNSF_OK; 5006 sf->nsf_eograce = NFSD_MONOSEC + sf->nsf_lease + 5007 NFSRV_LEASEDELTA; 5008 } 5009 5010 /* 5011 * Update the stable storage file, now that the grace period is over. 5012 */ 5013 void 5014 nfsrv_updatestable(NFSPROC_T *p) 5015 { 5016 struct nfsrv_stablefirst *sf = &NFSD_VNET(nfsrv_stablefirst); 5017 struct nfsrv_stable *sp, *nsp; 5018 int i; 5019 struct nfsvattr nva; 5020 vnode_t vp; 5021 #if defined(__FreeBSD_version) && (__FreeBSD_version >= 500000) 5022 mount_t mp = NULL; 5023 #endif 5024 int error; 5025 5026 if (sf->nsf_fp == NULL || (sf->nsf_flags & NFSNSF_UPDATEDONE)) 5027 return; 5028 sf->nsf_flags |= NFSNSF_UPDATEDONE; 5029 /* 5030 * Ok, we need to rewrite the stable storage file. 5031 * - truncate to 0 length 5032 * - write the new first structure 5033 * - loop through the data structures, writing out any that 5034 * have timestamps older than the old boot 5035 */ 5036 if (sf->nsf_bootvals) { 5037 sf->nsf_numboots++; 5038 for (i = sf->nsf_numboots - 2; i >= 0; i--) 5039 sf->nsf_bootvals[i + 1] = sf->nsf_bootvals[i]; 5040 } else { 5041 sf->nsf_numboots = 1; 5042 sf->nsf_bootvals = (time_t *)malloc(sizeof(time_t), 5043 M_TEMP, M_WAITOK); 5044 } 5045 sf->nsf_bootvals[0] = NFSD_VNET(nfsrvboottime); 5046 sf->nsf_lease = nfsrv_lease; 5047 NFSVNO_ATTRINIT(&nva); 5048 NFSVNO_SETATTRVAL(&nva, size, 0); 5049 vp = NFSFPVNODE(sf->nsf_fp); 5050 vn_start_write(vp, &mp, V_WAIT); 5051 if (NFSVOPLOCK(vp, LK_EXCLUSIVE) == 0) { 5052 error = nfsvno_setattr(vp, &nva, NFSFPCRED(sf->nsf_fp), p, 5053 NULL); 5054 NFSVOPUNLOCK(vp); 5055 } else 5056 error = EPERM; 5057 vn_finished_write(mp); 5058 if (!error) 5059 error = NFSD_RDWR(UIO_WRITE, vp, 5060 (caddr_t)&sf->nsf_rec, sizeof (struct nfsf_rec), (off_t)0, 5061 UIO_SYSSPACE, IO_SYNC, NFSFPCRED(sf->nsf_fp), NULL, p); 5062 if (!error) 5063 error = NFSD_RDWR(UIO_WRITE, vp, 5064 (caddr_t)sf->nsf_bootvals, 5065 sf->nsf_numboots * sizeof (time_t), 5066 (off_t)(sizeof (struct nfsf_rec)), 5067 UIO_SYSSPACE, IO_SYNC, NFSFPCRED(sf->nsf_fp), NULL, p); 5068 free(sf->nsf_bootvals, M_TEMP); 5069 sf->nsf_bootvals = NULL; 5070 if (error) { 5071 sf->nsf_flags &= ~NFSNSF_OK; 5072 printf("EEK! Can't write NfsV4 stable storage file\n"); 5073 return; 5074 } 5075 sf->nsf_flags |= NFSNSF_OK; 5076 5077 /* 5078 * Loop through the list and write out timestamp records for 5079 * any clients that successfully reclaimed state. 5080 */ 5081 LIST_FOREACH_SAFE(sp, &sf->nsf_head, nst_list, nsp) { 5082 if (sp->nst_flag & NFSNST_GOTSTATE) { 5083 nfsrv_writestable(sp->nst_client, sp->nst_len, 5084 NFSNST_NEWSTATE, p); 5085 sp->nst_clp->lc_flags |= LCL_STAMPEDSTABLE; 5086 } 5087 LIST_REMOVE(sp, nst_list); 5088 free(sp, M_TEMP); 5089 } 5090 nfsrv_backupstable(); 5091 } 5092 5093 /* 5094 * Append a record to the stable storage file. 5095 */ 5096 void 5097 nfsrv_writestable(u_char *client, int len, int flag, NFSPROC_T *p) 5098 { 5099 struct nfsrv_stablefirst *sf = &NFSD_VNET(nfsrv_stablefirst); 5100 struct nfst_rec *sp; 5101 int error; 5102 5103 if (!(sf->nsf_flags & NFSNSF_OK) || sf->nsf_fp == NULL) 5104 return; 5105 sp = (struct nfst_rec *)malloc(sizeof (struct nfst_rec) + 5106 len - 1, M_TEMP, M_WAITOK); 5107 sp->len = len; 5108 NFSBCOPY(client, sp->client, len); 5109 sp->flag = flag; 5110 error = NFSD_RDWR(UIO_WRITE, NFSFPVNODE(sf->nsf_fp), 5111 (caddr_t)sp, sizeof (struct nfst_rec) + len - 1, (off_t)0, 5112 UIO_SYSSPACE, (IO_SYNC | IO_APPEND), NFSFPCRED(sf->nsf_fp), NULL, p); 5113 free(sp, M_TEMP); 5114 if (error) { 5115 sf->nsf_flags &= ~NFSNSF_OK; 5116 printf("EEK! Can't write NfsV4 stable storage file\n"); 5117 } 5118 } 5119 5120 /* 5121 * This function is called during the grace period to mark a client 5122 * that successfully reclaimed state. 5123 */ 5124 static void 5125 nfsrv_markstable(struct nfsclient *clp) 5126 { 5127 struct nfsrv_stable *sp; 5128 5129 /* 5130 * First find the client structure. 5131 */ 5132 LIST_FOREACH(sp, &NFSD_VNET(nfsrv_stablefirst).nsf_head, nst_list) { 5133 if (sp->nst_len == clp->lc_idlen && 5134 !NFSBCMP(sp->nst_client, clp->lc_id, sp->nst_len)) 5135 break; 5136 } 5137 if (sp == LIST_END(&NFSD_VNET(nfsrv_stablefirst).nsf_head)) 5138 return; 5139 5140 /* 5141 * Now, just mark it and set the nfsclient back pointer. 5142 */ 5143 sp->nst_flag |= NFSNST_GOTSTATE; 5144 sp->nst_clp = clp; 5145 } 5146 5147 /* 5148 * This function is called when a NFSv4.1 client does a ReclaimComplete. 5149 * Very similar to nfsrv_markstable(), except for the flag being set. 5150 */ 5151 static void 5152 nfsrv_markreclaim(struct nfsclient *clp) 5153 { 5154 struct nfsrv_stable *sp; 5155 5156 /* 5157 * First find the client structure. 5158 */ 5159 LIST_FOREACH(sp, &NFSD_VNET(nfsrv_stablefirst).nsf_head, nst_list) { 5160 if (sp->nst_len == clp->lc_idlen && 5161 !NFSBCMP(sp->nst_client, clp->lc_id, sp->nst_len)) 5162 break; 5163 } 5164 if (sp == LIST_END(&NFSD_VNET(nfsrv_stablefirst).nsf_head)) 5165 return; 5166 5167 /* 5168 * Now, just set the flag. 5169 */ 5170 sp->nst_flag |= NFSNST_RECLAIMED; 5171 } 5172 5173 /* 5174 * This function is called for a reclaim, to see if it gets grace. 5175 * It returns 0 if a reclaim is allowed, 1 otherwise. 5176 */ 5177 static int 5178 nfsrv_checkstable(struct nfsclient *clp) 5179 { 5180 struct nfsrv_stable *sp; 5181 5182 /* 5183 * First, find the entry for the client. 5184 */ 5185 LIST_FOREACH(sp, &NFSD_VNET(nfsrv_stablefirst).nsf_head, nst_list) { 5186 if (sp->nst_len == clp->lc_idlen && 5187 !NFSBCMP(sp->nst_client, clp->lc_id, sp->nst_len)) 5188 break; 5189 } 5190 5191 /* 5192 * If not in the list, state was revoked or no state was issued 5193 * since the previous reboot, a reclaim is denied. 5194 */ 5195 if (sp == LIST_END(&NFSD_VNET(nfsrv_stablefirst).nsf_head) || 5196 (sp->nst_flag & NFSNST_REVOKE) || 5197 !(NFSD_VNET(nfsrv_stablefirst).nsf_flags & NFSNSF_OK)) 5198 return (1); 5199 return (0); 5200 } 5201 5202 /* 5203 * Test for and try to clear out a conflicting client. This is called by 5204 * nfsrv_lockctrl() and nfsrv_openctrl() when conflicts with other clients 5205 * a found. 5206 * The trick here is that it can't revoke a conflicting client with an 5207 * expired lease unless it holds the v4root lock, so... 5208 * If no v4root lock, get the lock and return 1 to indicate "try again". 5209 * Return 0 to indicate the conflict can't be revoked and 1 to indicate 5210 * the revocation worked and the conflicting client is "bye, bye", so it 5211 * can be tried again. 5212 * Return 2 to indicate that the vnode is VIRF_DOOMED after NFSVOPLOCK(). 5213 * Unlocks State before a non-zero value is returned. 5214 */ 5215 static int 5216 nfsrv_clientconflict(struct nfsclient *clp, int *haslockp, vnode_t vp, 5217 NFSPROC_T *p) 5218 { 5219 int gotlock, lktype = 0; 5220 5221 /* 5222 * If lease hasn't expired, we can't fix it. 5223 */ 5224 if (clp->lc_expiry >= NFSD_MONOSEC || 5225 !(NFSD_VNET(nfsrv_stablefirst).nsf_flags & NFSNSF_UPDATEDONE)) 5226 return (0); 5227 if (*haslockp == 0) { 5228 NFSUNLOCKSTATE(); 5229 if (vp != NULL) { 5230 lktype = NFSVOPISLOCKED(vp); 5231 NFSVOPUNLOCK(vp); 5232 } 5233 NFSLOCKV4ROOTMUTEX(); 5234 nfsv4_relref(&nfsv4rootfs_lock); 5235 do { 5236 gotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 5237 NFSV4ROOTLOCKMUTEXPTR, NULL); 5238 } while (!gotlock); 5239 NFSUNLOCKV4ROOTMUTEX(); 5240 *haslockp = 1; 5241 if (vp != NULL) { 5242 NFSVOPLOCK(vp, lktype | LK_RETRY); 5243 if (VN_IS_DOOMED(vp)) 5244 return (2); 5245 } 5246 return (1); 5247 } 5248 NFSUNLOCKSTATE(); 5249 5250 /* 5251 * Ok, we can expire the conflicting client. 5252 */ 5253 nfsrv_writestable(clp->lc_id, clp->lc_idlen, NFSNST_REVOKE, p); 5254 nfsrv_backupstable(); 5255 nfsrv_cleanclient(clp, p); 5256 nfsrv_freedeleglist(&clp->lc_deleg); 5257 nfsrv_freedeleglist(&clp->lc_olddeleg); 5258 LIST_REMOVE(clp, lc_hash); 5259 nfsrv_zapclient(clp, p); 5260 return (1); 5261 } 5262 5263 /* 5264 * Resolve a delegation conflict. 5265 * Returns 0 to indicate the conflict was resolved without sleeping. 5266 * Return -1 to indicate that the caller should check for conflicts again. 5267 * Return > 0 for an error that should be returned, normally NFSERR_DELAY. 5268 * 5269 * Also, manipulate the nfsv4root_lock, as required. It isn't changed 5270 * for a return of 0, since there was no sleep and it could be required 5271 * later. It is released for a return of NFSERR_DELAY, since the caller 5272 * will return that error. It is released when a sleep was done waiting 5273 * for the delegation to be returned or expire (so that other nfsds can 5274 * handle ops). Then, it must be acquired for the write to stable storage. 5275 * (This function is somewhat similar to nfsrv_clientconflict(), but 5276 * the semantics differ in a couple of subtle ways. The return of 0 5277 * indicates the conflict was resolved without sleeping here, not 5278 * that the conflict can't be resolved and the handling of nfsv4root_lock 5279 * differs, as noted above.) 5280 * Unlocks State before returning a non-zero value. 5281 */ 5282 static int 5283 nfsrv_delegconflict(struct nfsstate *stp, int *haslockp, NFSPROC_T *p, 5284 vnode_t vp) 5285 { 5286 struct nfsclient *clp = stp->ls_clp; 5287 int gotlock, error, lktype = 0, retrycnt, zapped_clp; 5288 nfsv4stateid_t tstateid; 5289 fhandle_t tfh; 5290 5291 /* 5292 * If the conflict is with an old delegation... 5293 */ 5294 if (stp->ls_flags & NFSLCK_OLDDELEG) { 5295 /* 5296 * You can delete it, if it has expired. 5297 */ 5298 if (clp->lc_delegtime < NFSD_MONOSEC) { 5299 nfsrv_freedeleg(stp); 5300 NFSUNLOCKSTATE(); 5301 error = -1; 5302 goto out; 5303 } 5304 NFSUNLOCKSTATE(); 5305 /* 5306 * During this delay, the old delegation could expire or it 5307 * could be recovered by the client via an Open with 5308 * CLAIM_DELEGATE_PREV. 5309 * Release the nfsv4root_lock, if held. 5310 */ 5311 if (*haslockp) { 5312 *haslockp = 0; 5313 NFSLOCKV4ROOTMUTEX(); 5314 nfsv4_unlock(&nfsv4rootfs_lock, 1); 5315 NFSUNLOCKV4ROOTMUTEX(); 5316 } 5317 error = NFSERR_DELAY; 5318 goto out; 5319 } 5320 5321 /* 5322 * It's a current delegation, so: 5323 * - check to see if the delegation has expired 5324 * - if so, get the v4root lock and then expire it 5325 */ 5326 if ((stp->ls_flags & NFSLCK_DELEGRECALL) == 0 || (stp->ls_lastrecall < 5327 NFSD_MONOSEC && clp->lc_expiry >= NFSD_MONOSEC && 5328 stp->ls_delegtime >= NFSD_MONOSEC)) { 5329 /* 5330 * - do a recall callback, since not yet done 5331 * For now, never allow truncate to be set. To use 5332 * truncate safely, it must be guaranteed that the 5333 * Remove, Rename or Setattr with size of 0 will 5334 * succeed and that would require major changes to 5335 * the VFS/Vnode OPs. 5336 * Set the expiry time large enough so that it won't expire 5337 * until after the callback, then set it correctly, once 5338 * the callback is done. (The delegation will now time 5339 * out whether or not the Recall worked ok. The timeout 5340 * will be extended when ops are done on the delegation 5341 * stateid, up to the timelimit.) 5342 */ 5343 if ((stp->ls_flags & NFSLCK_DELEGRECALL) == 0) { 5344 stp->ls_delegtime = NFSD_MONOSEC + (2 * nfsrv_lease) + 5345 NFSRV_LEASEDELTA; 5346 stp->ls_delegtimelimit = NFSD_MONOSEC + (6 * 5347 nfsrv_lease) + NFSRV_LEASEDELTA; 5348 stp->ls_flags |= NFSLCK_DELEGRECALL; 5349 } 5350 stp->ls_lastrecall = time_uptime + 1; 5351 5352 /* 5353 * Loop NFSRV_CBRETRYCNT times while the CBRecall replies 5354 * NFSERR_BADSTATEID or NFSERR_BADHANDLE. This is done 5355 * in order to try and avoid a race that could happen 5356 * when a CBRecall request passed the Open reply with 5357 * the delegation in it when transitting the network. 5358 * Since nfsrv_docallback will sleep, don't use stp after 5359 * the call. 5360 */ 5361 NFSBCOPY((caddr_t)&stp->ls_stateid, (caddr_t)&tstateid, 5362 sizeof (tstateid)); 5363 NFSBCOPY((caddr_t)&stp->ls_lfp->lf_fh, (caddr_t)&tfh, 5364 sizeof (tfh)); 5365 NFSUNLOCKSTATE(); 5366 if (*haslockp) { 5367 *haslockp = 0; 5368 NFSLOCKV4ROOTMUTEX(); 5369 nfsv4_unlock(&nfsv4rootfs_lock, 1); 5370 NFSUNLOCKV4ROOTMUTEX(); 5371 } 5372 retrycnt = 0; 5373 do { 5374 error = nfsrv_docallback(clp, NFSV4OP_CBRECALL, 5375 &tstateid, 0, &tfh, NULL, NULL, 0, p); 5376 retrycnt++; 5377 } while ((error == NFSERR_BADSTATEID || 5378 error == NFSERR_BADHANDLE) && retrycnt < NFSV4_CBRETRYCNT); 5379 error = NFSERR_DELAY; 5380 goto out; 5381 } 5382 5383 if (clp->lc_expiry >= NFSD_MONOSEC && 5384 stp->ls_delegtime >= NFSD_MONOSEC) { 5385 NFSUNLOCKSTATE(); 5386 /* 5387 * A recall has been done, but it has not yet expired. 5388 * So, RETURN_DELAY. 5389 */ 5390 if (*haslockp) { 5391 *haslockp = 0; 5392 NFSLOCKV4ROOTMUTEX(); 5393 nfsv4_unlock(&nfsv4rootfs_lock, 1); 5394 NFSUNLOCKV4ROOTMUTEX(); 5395 } 5396 error = NFSERR_DELAY; 5397 goto out; 5398 } 5399 5400 /* 5401 * If we don't yet have the lock, just get it and then return, 5402 * since we need that before deleting expired state, such as 5403 * this delegation. 5404 * When getting the lock, unlock the vnode, so other nfsds that 5405 * are in progress, won't get stuck waiting for the vnode lock. 5406 */ 5407 if (*haslockp == 0) { 5408 NFSUNLOCKSTATE(); 5409 if (vp != NULL) { 5410 lktype = NFSVOPISLOCKED(vp); 5411 NFSVOPUNLOCK(vp); 5412 } 5413 NFSLOCKV4ROOTMUTEX(); 5414 nfsv4_relref(&nfsv4rootfs_lock); 5415 do { 5416 gotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 5417 NFSV4ROOTLOCKMUTEXPTR, NULL); 5418 } while (!gotlock); 5419 NFSUNLOCKV4ROOTMUTEX(); 5420 *haslockp = 1; 5421 if (vp != NULL) { 5422 NFSVOPLOCK(vp, lktype | LK_RETRY); 5423 if (VN_IS_DOOMED(vp)) { 5424 *haslockp = 0; 5425 NFSLOCKV4ROOTMUTEX(); 5426 nfsv4_unlock(&nfsv4rootfs_lock, 1); 5427 NFSUNLOCKV4ROOTMUTEX(); 5428 error = NFSERR_PERM; 5429 goto out; 5430 } 5431 } 5432 error = -1; 5433 goto out; 5434 } 5435 5436 NFSUNLOCKSTATE(); 5437 /* 5438 * Ok, we can delete the expired delegation. 5439 * First, write the Revoke record to stable storage and then 5440 * clear out the conflict. 5441 * Since all other nfsd threads are now blocked, we can safely 5442 * sleep without the state changing. 5443 */ 5444 nfsrv_writestable(clp->lc_id, clp->lc_idlen, NFSNST_REVOKE, p); 5445 nfsrv_backupstable(); 5446 if (clp->lc_expiry < NFSD_MONOSEC) { 5447 nfsrv_cleanclient(clp, p); 5448 nfsrv_freedeleglist(&clp->lc_deleg); 5449 nfsrv_freedeleglist(&clp->lc_olddeleg); 5450 LIST_REMOVE(clp, lc_hash); 5451 zapped_clp = 1; 5452 } else { 5453 nfsrv_freedeleg(stp); 5454 zapped_clp = 0; 5455 } 5456 if (zapped_clp) 5457 nfsrv_zapclient(clp, p); 5458 error = -1; 5459 5460 out: 5461 NFSEXITCODE(error); 5462 return (error); 5463 } 5464 5465 /* 5466 * Check for a remove allowed, if remove is set to 1 and get rid of 5467 * delegations. 5468 */ 5469 int 5470 nfsrv_checkremove(vnode_t vp, int remove, struct nfsrv_descript *nd, 5471 nfsquad_t clientid, NFSPROC_T *p) 5472 { 5473 struct nfsclient *clp; 5474 struct nfsstate *stp; 5475 struct nfslockfile *lfp; 5476 int error, haslock = 0; 5477 fhandle_t nfh; 5478 5479 clp = NULL; 5480 /* 5481 * First, get the lock file structure. 5482 * (A return of -1 means no associated state, so remove ok.) 5483 */ 5484 error = nfsrv_getlockfh(vp, NFSLCK_CHECK, NULL, &nfh, p); 5485 tryagain: 5486 NFSLOCKSTATE(); 5487 if (error == 0 && clientid.qval != 0) 5488 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 5489 (nfsquad_t)((u_quad_t)0), 0, nd, p); 5490 if (!error) 5491 error = nfsrv_getlockfile(NFSLCK_CHECK, NULL, &lfp, &nfh, 0); 5492 if (error) { 5493 NFSUNLOCKSTATE(); 5494 if (haslock) { 5495 NFSLOCKV4ROOTMUTEX(); 5496 nfsv4_unlock(&nfsv4rootfs_lock, 1); 5497 NFSUNLOCKV4ROOTMUTEX(); 5498 } 5499 if (error == -1) 5500 error = 0; 5501 goto out; 5502 } 5503 5504 /* 5505 * Now, we must Recall any delegations. 5506 */ 5507 error = nfsrv_cleandeleg(vp, lfp, clp, &haslock, p); 5508 if (error) { 5509 /* 5510 * nfsrv_cleandeleg() unlocks state for non-zero 5511 * return. 5512 */ 5513 if (error == -1) 5514 goto tryagain; 5515 if (haslock) { 5516 NFSLOCKV4ROOTMUTEX(); 5517 nfsv4_unlock(&nfsv4rootfs_lock, 1); 5518 NFSUNLOCKV4ROOTMUTEX(); 5519 } 5520 goto out; 5521 } 5522 5523 /* 5524 * Now, look for a conflicting open share. 5525 */ 5526 if (remove) { 5527 /* 5528 * If the entry in the directory was the last reference to the 5529 * corresponding filesystem object, the object can be destroyed 5530 * */ 5531 if(lfp->lf_usecount>1) 5532 LIST_FOREACH(stp, &lfp->lf_open, ls_file) { 5533 if (stp->ls_flags & NFSLCK_WRITEDENY) { 5534 error = NFSERR_FILEOPEN; 5535 break; 5536 } 5537 } 5538 } 5539 5540 NFSUNLOCKSTATE(); 5541 if (haslock) { 5542 NFSLOCKV4ROOTMUTEX(); 5543 nfsv4_unlock(&nfsv4rootfs_lock, 1); 5544 NFSUNLOCKV4ROOTMUTEX(); 5545 } 5546 5547 out: 5548 NFSEXITCODE(error); 5549 return (error); 5550 } 5551 5552 /* 5553 * Clear out all delegations for the file referred to by lfp. 5554 * May return NFSERR_DELAY, if there will be a delay waiting for 5555 * delegations to expire. 5556 * Returns -1 to indicate it slept while recalling a delegation. 5557 * This function has the side effect of deleting the nfslockfile structure, 5558 * if it no longer has associated state and didn't have to sleep. 5559 * Unlocks State before a non-zero value is returned. 5560 */ 5561 static int 5562 nfsrv_cleandeleg(vnode_t vp, struct nfslockfile *lfp, 5563 struct nfsclient *clp, int *haslockp, NFSPROC_T *p) 5564 { 5565 struct nfsstate *stp, *nstp; 5566 int ret = 0; 5567 5568 stp = LIST_FIRST(&lfp->lf_deleg); 5569 while (stp != LIST_END(&lfp->lf_deleg)) { 5570 nstp = LIST_NEXT(stp, ls_file); 5571 if (stp->ls_clp != clp) { 5572 ret = nfsrv_delegconflict(stp, haslockp, p, vp); 5573 if (ret) { 5574 /* 5575 * nfsrv_delegconflict() unlocks state 5576 * when it returns non-zero. 5577 */ 5578 goto out; 5579 } 5580 } 5581 stp = nstp; 5582 } 5583 out: 5584 NFSEXITCODE(ret); 5585 return (ret); 5586 } 5587 5588 /* 5589 * There are certain operations that, when being done outside of NFSv4, 5590 * require that any NFSv4 delegation for the file be recalled. 5591 * This function is to be called for those cases: 5592 * VOP_RENAME() - When a delegation is being recalled for any reason, 5593 * the client may have to do Opens against the server, using the file's 5594 * final component name. If the file has been renamed on the server, 5595 * that component name will be incorrect and the Open will fail. 5596 * VOP_REMOVE() - Theoretically, a client could Open a file after it has 5597 * been removed on the server, if there is a delegation issued to 5598 * that client for the file. I say "theoretically" since clients 5599 * normally do an Access Op before the Open and that Access Op will 5600 * fail with ESTALE. Note that NFSv2 and 3 don't even do Opens, so 5601 * they will detect the file's removal in the same manner. (There is 5602 * one case where RFC3530 allows a client to do an Open without first 5603 * doing an Access Op, which is passage of a check against the ACE 5604 * returned with a Write delegation, but current practice is to ignore 5605 * the ACE and always do an Access Op.) 5606 * Since the functions can only be called with an unlocked vnode, this 5607 * can't be done at this time. 5608 * VOP_ADVLOCK() - When a client holds a delegation, it can issue byte range 5609 * locks locally in the client, which are not visible to the server. To 5610 * deal with this, issuing of delegations for a vnode must be disabled 5611 * and all delegations for the vnode recalled. This is done via the 5612 * second function, using the VV_DISABLEDELEG vflag on the vnode. 5613 */ 5614 void 5615 nfsd_recalldelegation(vnode_t vp, NFSPROC_T *p) 5616 { 5617 time_t starttime; 5618 int error; 5619 5620 /* 5621 * First, check to see if the server is currently running and it has 5622 * been called for a regular file when issuing delegations. 5623 */ 5624 if (NFSD_VNET(nfsrv_numnfsd) == 0 || vp->v_type != VREG || 5625 nfsrv_issuedelegs == 0) 5626 return; 5627 5628 KASSERT((NFSVOPISLOCKED(vp) != LK_EXCLUSIVE), ("vp %p is locked", vp)); 5629 /* 5630 * First, get a reference on the nfsv4rootfs_lock so that an 5631 * exclusive lock cannot be acquired by another thread. 5632 */ 5633 NFSLOCKV4ROOTMUTEX(); 5634 nfsv4_getref(&nfsv4rootfs_lock, NULL, NFSV4ROOTLOCKMUTEXPTR, NULL); 5635 NFSUNLOCKV4ROOTMUTEX(); 5636 5637 /* 5638 * Now, call nfsrv_checkremove() in a loop while it returns 5639 * NFSERR_DELAY. Return upon any other error or when timed out. 5640 */ 5641 starttime = NFSD_MONOSEC; 5642 do { 5643 if (NFSVOPLOCK(vp, LK_EXCLUSIVE) == 0) { 5644 error = nfsrv_checkremove(vp, 0, NULL, 5645 (nfsquad_t)((u_quad_t)0), p); 5646 NFSVOPUNLOCK(vp); 5647 } else 5648 error = EPERM; 5649 if (error == NFSERR_DELAY) { 5650 if (NFSD_MONOSEC - starttime > NFS_REMOVETIMEO) 5651 break; 5652 /* Sleep for a short period of time */ 5653 (void) nfs_catnap(PZERO, 0, "nfsremove"); 5654 } 5655 } while (error == NFSERR_DELAY); 5656 NFSLOCKV4ROOTMUTEX(); 5657 nfsv4_relref(&nfsv4rootfs_lock); 5658 NFSUNLOCKV4ROOTMUTEX(); 5659 } 5660 5661 void 5662 nfsd_disabledelegation(vnode_t vp, NFSPROC_T *p) 5663 { 5664 5665 #ifdef VV_DISABLEDELEG 5666 /* 5667 * First, flag issuance of delegations disabled. 5668 */ 5669 atomic_set_long(&vp->v_vflag, VV_DISABLEDELEG); 5670 #endif 5671 5672 /* 5673 * Then call nfsd_recalldelegation() to get rid of all extant 5674 * delegations. 5675 */ 5676 nfsd_recalldelegation(vp, p); 5677 } 5678 5679 /* 5680 * Check for conflicting locks, etc. and then get rid of delegations. 5681 * (At one point I thought that I should get rid of delegations for any 5682 * Setattr, since it could potentially disallow the I/O op (read or write) 5683 * allowed by the delegation. However, Setattr Ops that aren't changing 5684 * the size get a stateid of all 0s, so you can't tell if it is a delegation 5685 * for the same client or a different one, so I decided to only get rid 5686 * of delegations for other clients when the size is being changed.) 5687 * In general, a Setattr can disable NFS I/O Ops that are outstanding, such 5688 * as Write backs, even if there is no delegation, so it really isn't any 5689 * different?) 5690 */ 5691 int 5692 nfsrv_checksetattr(vnode_t vp, struct nfsrv_descript *nd, 5693 nfsv4stateid_t *stateidp, struct nfsvattr *nvap, nfsattrbit_t *attrbitp, 5694 struct nfsexstuff *exp, NFSPROC_T *p) 5695 { 5696 struct nfsstate st, *stp = &st; 5697 struct nfslock lo, *lop = &lo; 5698 int error = 0; 5699 nfsquad_t clientid; 5700 5701 if (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_SIZE)) { 5702 stp->ls_flags = (NFSLCK_CHECK | NFSLCK_WRITEACCESS); 5703 lop->lo_first = nvap->na_size; 5704 } else { 5705 stp->ls_flags = 0; 5706 lop->lo_first = 0; 5707 } 5708 if (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_OWNER) || 5709 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_OWNERGROUP) || 5710 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_MODE) || 5711 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_ACL)) 5712 stp->ls_flags |= NFSLCK_SETATTR; 5713 if (stp->ls_flags == 0) 5714 goto out; 5715 lop->lo_end = NFS64BITSSET; 5716 lop->lo_flags = NFSLCK_WRITE; 5717 stp->ls_ownerlen = 0; 5718 stp->ls_op = NULL; 5719 stp->ls_uid = nd->nd_cred->cr_uid; 5720 stp->ls_stateid.seqid = stateidp->seqid; 5721 clientid.lval[0] = stp->ls_stateid.other[0] = stateidp->other[0]; 5722 clientid.lval[1] = stp->ls_stateid.other[1] = stateidp->other[1]; 5723 stp->ls_stateid.other[2] = stateidp->other[2]; 5724 error = nfsrv_lockctrl(vp, &stp, &lop, NULL, clientid, 5725 stateidp, exp, nd, p); 5726 5727 out: 5728 NFSEXITCODE2(error, nd); 5729 return (error); 5730 } 5731 5732 /* 5733 * Check for a write delegation and do a CBGETATTR if there is one, updating 5734 * the attributes, as required. 5735 * Should I return an error if I can't get the attributes? (For now, I'll 5736 * just return ok. 5737 */ 5738 int 5739 nfsrv_checkgetattr(struct nfsrv_descript *nd, vnode_t vp, 5740 struct nfsvattr *nvap, nfsattrbit_t *attrbitp, NFSPROC_T *p) 5741 { 5742 struct nfsstate *stp; 5743 struct nfslockfile *lfp; 5744 struct nfsclient *clp; 5745 struct nfsvattr nva; 5746 fhandle_t nfh; 5747 int error = 0; 5748 nfsattrbit_t cbbits; 5749 u_quad_t delegfilerev; 5750 5751 NFSCBGETATTR_ATTRBIT(attrbitp, &cbbits); 5752 if (!NFSNONZERO_ATTRBIT(&cbbits)) 5753 goto out; 5754 if (nfsrv_writedelegcnt == 0) 5755 goto out; 5756 5757 /* 5758 * Get the lock file structure. 5759 * (A return of -1 means no associated state, so return ok.) 5760 */ 5761 error = nfsrv_getlockfh(vp, NFSLCK_CHECK, NULL, &nfh, p); 5762 NFSLOCKSTATE(); 5763 if (!error) 5764 error = nfsrv_getlockfile(NFSLCK_CHECK, NULL, &lfp, &nfh, 0); 5765 if (error) { 5766 NFSUNLOCKSTATE(); 5767 if (error == -1) 5768 error = 0; 5769 goto out; 5770 } 5771 5772 /* 5773 * Now, look for a write delegation. 5774 */ 5775 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) { 5776 if (stp->ls_flags & NFSLCK_DELEGWRITE) 5777 break; 5778 } 5779 if (stp == LIST_END(&lfp->lf_deleg)) { 5780 NFSUNLOCKSTATE(); 5781 goto out; 5782 } 5783 clp = stp->ls_clp; 5784 5785 /* If the clientid is not confirmed, ignore the delegation. */ 5786 if (clp->lc_flags & LCL_NEEDSCONFIRM) { 5787 NFSUNLOCKSTATE(); 5788 goto out; 5789 } 5790 5791 delegfilerev = stp->ls_filerev; 5792 /* 5793 * If the Write delegation was issued as a part of this Compound RPC 5794 * or if we have an Implied Clientid (used in a previous Op in this 5795 * compound) and it is the client the delegation was issued to, 5796 * just return ok. 5797 * I also assume that it is from the same client iff the network 5798 * host IP address is the same as the callback address. (Not 5799 * exactly correct by the RFC, but avoids a lot of Getattr 5800 * callbacks.) 5801 */ 5802 if (nd->nd_compref == stp->ls_compref || 5803 ((nd->nd_flag & ND_IMPLIEDCLID) && 5804 clp->lc_clientid.qval == nd->nd_clientid.qval) || 5805 nfsaddr2_match(clp->lc_req.nr_nam, nd->nd_nam)) { 5806 NFSUNLOCKSTATE(); 5807 goto out; 5808 } 5809 5810 /* 5811 * We are now done with the delegation state structure, 5812 * so the statelock can be released and we can now tsleep(). 5813 */ 5814 5815 /* 5816 * Now, we must do the CB Getattr callback, to see if Change or Size 5817 * has changed. 5818 */ 5819 if (clp->lc_expiry >= NFSD_MONOSEC) { 5820 NFSUNLOCKSTATE(); 5821 NFSVNO_ATTRINIT(&nva); 5822 nva.na_filerev = NFS64BITSSET; 5823 error = nfsrv_docallback(clp, NFSV4OP_CBGETATTR, NULL, 5824 0, &nfh, &nva, &cbbits, 0, p); 5825 if (!error) { 5826 if ((nva.na_filerev != NFS64BITSSET && 5827 nva.na_filerev > delegfilerev) || 5828 (NFSVNO_ISSETSIZE(&nva) && 5829 nva.na_size != nvap->na_size)) { 5830 error = nfsvno_updfilerev(vp, nvap, nd, p); 5831 if (NFSVNO_ISSETSIZE(&nva)) 5832 nvap->na_size = nva.na_size; 5833 } 5834 } else 5835 error = 0; /* Ignore callback errors for now. */ 5836 } else { 5837 NFSUNLOCKSTATE(); 5838 } 5839 5840 out: 5841 NFSEXITCODE2(error, nd); 5842 return (error); 5843 } 5844 5845 /* 5846 * This function looks for openowners that haven't had any opens for 5847 * a while and throws them away. Called by an nfsd when NFSNSF_NOOPENS 5848 * is set. 5849 */ 5850 void 5851 nfsrv_throwawayopens(NFSPROC_T *p) 5852 { 5853 struct nfsclient *clp, *nclp; 5854 struct nfsstate *stp, *nstp; 5855 int i; 5856 5857 NFSLOCKSTATE(); 5858 NFSD_VNET(nfsrv_stablefirst).nsf_flags &= ~NFSNSF_NOOPENS; 5859 /* 5860 * For each client... 5861 */ 5862 for (i = 0; i < nfsrv_clienthashsize; i++) { 5863 LIST_FOREACH_SAFE(clp, &NFSD_VNET(nfsclienthash)[i], lc_hash, 5864 nclp) { 5865 LIST_FOREACH_SAFE(stp, &clp->lc_open, ls_list, nstp) { 5866 if (LIST_EMPTY(&stp->ls_open) && 5867 (stp->ls_noopens > NFSNOOPEN || 5868 (nfsrv_openpluslock * 2) > 5869 nfsrv_v4statelimit)) 5870 nfsrv_freeopenowner(stp, 0, p); 5871 } 5872 } 5873 } 5874 NFSUNLOCKSTATE(); 5875 } 5876 5877 /* 5878 * This function checks to see if the credentials are the same. 5879 * The check for same credentials is needed for state management operations 5880 * for NFSv4.0 where 1 is returned if not same, 0 is returned otherwise. 5881 */ 5882 static int 5883 nfsrv_notsamecredname(struct nfsrv_descript *nd, struct nfsclient *clp) 5884 { 5885 5886 /* For NFSv4.1/4.2, SP4_NONE always allows this. */ 5887 if ((nd->nd_flag & ND_NFSV41) != 0) 5888 return (0); 5889 5890 if (nd->nd_flag & ND_GSS) { 5891 if (!(clp->lc_flags & LCL_GSS)) 5892 return (1); 5893 if (clp->lc_flags & LCL_NAME) { 5894 if (nd->nd_princlen != clp->lc_namelen || 5895 NFSBCMP(nd->nd_principal, clp->lc_name, 5896 clp->lc_namelen)) 5897 return (1); 5898 else 5899 return (0); 5900 } 5901 if (nd->nd_cred->cr_uid == clp->lc_uid) 5902 return (0); 5903 else 5904 return (1); 5905 } else if (clp->lc_flags & LCL_GSS) 5906 return (1); 5907 /* 5908 * For AUTH_SYS, allow the same uid or root. (This is underspecified 5909 * in RFC3530, which talks about principals, but doesn't say anything 5910 * about uids for AUTH_SYS.) 5911 */ 5912 if (nd->nd_cred->cr_uid == clp->lc_uid || nd->nd_cred->cr_uid == 0) 5913 return (0); 5914 else 5915 return (1); 5916 } 5917 5918 /* 5919 * Calculate the lease expiry time. 5920 */ 5921 static time_t 5922 nfsrv_leaseexpiry(void) 5923 { 5924 5925 if (NFSD_VNET(nfsrv_stablefirst).nsf_eograce > NFSD_MONOSEC) 5926 return (NFSD_MONOSEC + 2 * (nfsrv_lease + NFSRV_LEASEDELTA)); 5927 return (NFSD_MONOSEC + nfsrv_lease + NFSRV_LEASEDELTA); 5928 } 5929 5930 /* 5931 * Delay the delegation timeout as far as ls_delegtimelimit, as required. 5932 */ 5933 static void 5934 nfsrv_delaydelegtimeout(struct nfsstate *stp) 5935 { 5936 5937 if ((stp->ls_flags & NFSLCK_DELEGRECALL) == 0) 5938 return; 5939 5940 if ((stp->ls_delegtime + 15) > NFSD_MONOSEC && 5941 stp->ls_delegtime < stp->ls_delegtimelimit) { 5942 stp->ls_delegtime += nfsrv_lease; 5943 if (stp->ls_delegtime > stp->ls_delegtimelimit) 5944 stp->ls_delegtime = stp->ls_delegtimelimit; 5945 } 5946 } 5947 5948 /* 5949 * This function checks to see if there is any other state associated 5950 * with the openowner for this Open. 5951 * It returns 1 if there is no other state, 0 otherwise. 5952 */ 5953 static int 5954 nfsrv_nootherstate(struct nfsstate *stp) 5955 { 5956 struct nfsstate *tstp; 5957 5958 LIST_FOREACH(tstp, &stp->ls_openowner->ls_open, ls_list) { 5959 if (tstp != stp || !LIST_EMPTY(&tstp->ls_lock)) 5960 return (0); 5961 } 5962 return (1); 5963 } 5964 5965 /* 5966 * Create a list of lock deltas (changes to local byte range locking 5967 * that can be rolled back using the list) and apply the changes via 5968 * nfsvno_advlock(). Optionally, lock the list. It is expected that either 5969 * the rollback or update function will be called after this. 5970 * It returns an error (and rolls back, as required), if any nfsvno_advlock() 5971 * call fails. If it returns an error, it will unlock the list. 5972 */ 5973 static int 5974 nfsrv_locallock(vnode_t vp, struct nfslockfile *lfp, int flags, 5975 uint64_t first, uint64_t end, struct nfslockconflict *cfp, NFSPROC_T *p) 5976 { 5977 struct nfslock *lop, *nlop; 5978 int error = 0; 5979 5980 /* Loop through the list of locks. */ 5981 lop = LIST_FIRST(&lfp->lf_locallock); 5982 while (first < end && lop != NULL) { 5983 nlop = LIST_NEXT(lop, lo_lckowner); 5984 if (first >= lop->lo_end) { 5985 /* not there yet */ 5986 lop = nlop; 5987 } else if (first < lop->lo_first) { 5988 /* new one starts before entry in list */ 5989 if (end <= lop->lo_first) { 5990 /* no overlap between old and new */ 5991 error = nfsrv_dolocal(vp, lfp, flags, 5992 NFSLCK_UNLOCK, first, end, cfp, p); 5993 if (error != 0) 5994 break; 5995 first = end; 5996 } else { 5997 /* handle fragment overlapped with new one */ 5998 error = nfsrv_dolocal(vp, lfp, flags, 5999 NFSLCK_UNLOCK, first, lop->lo_first, cfp, 6000 p); 6001 if (error != 0) 6002 break; 6003 first = lop->lo_first; 6004 } 6005 } else { 6006 /* new one overlaps this entry in list */ 6007 if (end <= lop->lo_end) { 6008 /* overlaps all of new one */ 6009 error = nfsrv_dolocal(vp, lfp, flags, 6010 lop->lo_flags, first, end, cfp, p); 6011 if (error != 0) 6012 break; 6013 first = end; 6014 } else { 6015 /* handle fragment overlapped with new one */ 6016 error = nfsrv_dolocal(vp, lfp, flags, 6017 lop->lo_flags, first, lop->lo_end, cfp, p); 6018 if (error != 0) 6019 break; 6020 first = lop->lo_end; 6021 lop = nlop; 6022 } 6023 } 6024 } 6025 if (first < end && error == 0) 6026 /* handle fragment past end of list */ 6027 error = nfsrv_dolocal(vp, lfp, flags, NFSLCK_UNLOCK, first, 6028 end, cfp, p); 6029 6030 NFSEXITCODE(error); 6031 return (error); 6032 } 6033 6034 /* 6035 * Local lock unlock. Unlock all byte ranges that are no longer locked 6036 * by NFSv4. To do this, unlock any subranges of first-->end that 6037 * do not overlap with the byte ranges of any lock in the lfp->lf_lock 6038 * list. This list has all locks for the file held by other 6039 * <clientid, lockowner> tuples. The list is ordered by increasing 6040 * lo_first value, but may have entries that overlap each other, for 6041 * the case of read locks. 6042 */ 6043 static void 6044 nfsrv_localunlock(vnode_t vp, struct nfslockfile *lfp, uint64_t init_first, 6045 uint64_t init_end, NFSPROC_T *p) 6046 { 6047 struct nfslock *lop; 6048 uint64_t first, end, prevfirst __unused; 6049 6050 first = init_first; 6051 end = init_end; 6052 while (first < init_end) { 6053 /* Loop through all nfs locks, adjusting first and end */ 6054 prevfirst = 0; 6055 LIST_FOREACH(lop, &lfp->lf_lock, lo_lckfile) { 6056 KASSERT(prevfirst <= lop->lo_first, 6057 ("nfsv4 locks out of order")); 6058 KASSERT(lop->lo_first < lop->lo_end, 6059 ("nfsv4 bogus lock")); 6060 prevfirst = lop->lo_first; 6061 if (first >= lop->lo_first && 6062 first < lop->lo_end) 6063 /* 6064 * Overlaps with initial part, so trim 6065 * off that initial part by moving first past 6066 * it. 6067 */ 6068 first = lop->lo_end; 6069 else if (end > lop->lo_first && 6070 lop->lo_first > first) { 6071 /* 6072 * This lock defines the end of the 6073 * segment to unlock, so set end to the 6074 * start of it and break out of the loop. 6075 */ 6076 end = lop->lo_first; 6077 break; 6078 } 6079 if (first >= end) 6080 /* 6081 * There is no segment left to do, so 6082 * break out of this loop and then exit 6083 * the outer while() since first will be set 6084 * to end, which must equal init_end here. 6085 */ 6086 break; 6087 } 6088 if (first < end) { 6089 /* Unlock this segment */ 6090 (void) nfsrv_dolocal(vp, lfp, NFSLCK_UNLOCK, 6091 NFSLCK_READ, first, end, NULL, p); 6092 nfsrv_locallock_commit(lfp, NFSLCK_UNLOCK, 6093 first, end); 6094 } 6095 /* 6096 * Now move past this segment and look for any further 6097 * segment in the range, if there is one. 6098 */ 6099 first = end; 6100 end = init_end; 6101 } 6102 } 6103 6104 /* 6105 * Do the local lock operation and update the rollback list, as required. 6106 * Perform the rollback and return the error if nfsvno_advlock() fails. 6107 */ 6108 static int 6109 nfsrv_dolocal(vnode_t vp, struct nfslockfile *lfp, int flags, int oldflags, 6110 uint64_t first, uint64_t end, struct nfslockconflict *cfp, NFSPROC_T *p) 6111 { 6112 struct nfsrollback *rlp; 6113 int error = 0, ltype, oldltype; 6114 6115 if (flags & NFSLCK_WRITE) 6116 ltype = F_WRLCK; 6117 else if (flags & NFSLCK_READ) 6118 ltype = F_RDLCK; 6119 else 6120 ltype = F_UNLCK; 6121 if (oldflags & NFSLCK_WRITE) 6122 oldltype = F_WRLCK; 6123 else if (oldflags & NFSLCK_READ) 6124 oldltype = F_RDLCK; 6125 else 6126 oldltype = F_UNLCK; 6127 if (ltype == oldltype || (oldltype == F_WRLCK && ltype == F_RDLCK)) 6128 /* nothing to do */ 6129 goto out; 6130 error = nfsvno_advlock(vp, ltype, first, end, p); 6131 if (error != 0) { 6132 if (cfp != NULL) { 6133 cfp->cl_clientid.lval[0] = 0; 6134 cfp->cl_clientid.lval[1] = 0; 6135 cfp->cl_first = 0; 6136 cfp->cl_end = NFS64BITSSET; 6137 cfp->cl_flags = NFSLCK_WRITE; 6138 cfp->cl_ownerlen = 5; 6139 NFSBCOPY("LOCAL", cfp->cl_owner, 5); 6140 } 6141 nfsrv_locallock_rollback(vp, lfp, p); 6142 } else if (ltype != F_UNLCK) { 6143 rlp = malloc(sizeof (struct nfsrollback), M_NFSDROLLBACK, 6144 M_WAITOK); 6145 rlp->rlck_first = first; 6146 rlp->rlck_end = end; 6147 rlp->rlck_type = oldltype; 6148 LIST_INSERT_HEAD(&lfp->lf_rollback, rlp, rlck_list); 6149 } 6150 6151 out: 6152 NFSEXITCODE(error); 6153 return (error); 6154 } 6155 6156 /* 6157 * Roll back local lock changes and free up the rollback list. 6158 */ 6159 static void 6160 nfsrv_locallock_rollback(vnode_t vp, struct nfslockfile *lfp, NFSPROC_T *p) 6161 { 6162 struct nfsrollback *rlp, *nrlp; 6163 6164 LIST_FOREACH_SAFE(rlp, &lfp->lf_rollback, rlck_list, nrlp) { 6165 (void) nfsvno_advlock(vp, rlp->rlck_type, rlp->rlck_first, 6166 rlp->rlck_end, p); 6167 free(rlp, M_NFSDROLLBACK); 6168 } 6169 LIST_INIT(&lfp->lf_rollback); 6170 } 6171 6172 /* 6173 * Update local lock list and delete rollback list (ie now committed to the 6174 * local locks). Most of the work is done by the internal function. 6175 */ 6176 static void 6177 nfsrv_locallock_commit(struct nfslockfile *lfp, int flags, uint64_t first, 6178 uint64_t end) 6179 { 6180 struct nfsrollback *rlp, *nrlp; 6181 struct nfslock *new_lop, *other_lop; 6182 6183 new_lop = malloc(sizeof (struct nfslock), M_NFSDLOCK, M_WAITOK); 6184 if (flags & (NFSLCK_READ | NFSLCK_WRITE)) 6185 other_lop = malloc(sizeof (struct nfslock), M_NFSDLOCK, 6186 M_WAITOK); 6187 else 6188 other_lop = NULL; 6189 new_lop->lo_flags = flags; 6190 new_lop->lo_first = first; 6191 new_lop->lo_end = end; 6192 nfsrv_updatelock(NULL, &new_lop, &other_lop, lfp); 6193 if (new_lop != NULL) 6194 free(new_lop, M_NFSDLOCK); 6195 if (other_lop != NULL) 6196 free(other_lop, M_NFSDLOCK); 6197 6198 /* and get rid of the rollback list */ 6199 LIST_FOREACH_SAFE(rlp, &lfp->lf_rollback, rlck_list, nrlp) 6200 free(rlp, M_NFSDROLLBACK); 6201 LIST_INIT(&lfp->lf_rollback); 6202 } 6203 6204 /* 6205 * Lock the struct nfslockfile for local lock updating. 6206 */ 6207 static void 6208 nfsrv_locklf(struct nfslockfile *lfp) 6209 { 6210 int gotlock; 6211 6212 /* lf_usecount ensures *lfp won't be free'd */ 6213 lfp->lf_usecount++; 6214 do { 6215 gotlock = nfsv4_lock(&lfp->lf_locallock_lck, 1, NULL, 6216 NFSSTATEMUTEXPTR, NULL); 6217 } while (gotlock == 0); 6218 lfp->lf_usecount--; 6219 } 6220 6221 /* 6222 * Unlock the struct nfslockfile after local lock updating. 6223 */ 6224 static void 6225 nfsrv_unlocklf(struct nfslockfile *lfp) 6226 { 6227 6228 nfsv4_unlock(&lfp->lf_locallock_lck, 0); 6229 } 6230 6231 /* 6232 * Clear out all state for the NFSv4 server. 6233 * Must be called by a thread that can sleep when no nfsds are running. 6234 */ 6235 void 6236 nfsrv_throwawayallstate(NFSPROC_T *p) 6237 { 6238 struct nfsclient *clp, *nclp; 6239 struct nfslockfile *lfp, *nlfp; 6240 int i; 6241 6242 /* 6243 * For each client, clean out the state and then free the structure. 6244 */ 6245 for (i = 0; i < nfsrv_clienthashsize; i++) { 6246 LIST_FOREACH_SAFE(clp, &NFSD_VNET(nfsclienthash)[i], lc_hash, 6247 nclp) { 6248 nfsrv_cleanclient(clp, p); 6249 nfsrv_freedeleglist(&clp->lc_deleg); 6250 nfsrv_freedeleglist(&clp->lc_olddeleg); 6251 free(clp->lc_stateid, M_NFSDCLIENT); 6252 free(clp, M_NFSDCLIENT); 6253 } 6254 } 6255 6256 /* 6257 * Also, free up any remaining lock file structures. 6258 */ 6259 for (i = 0; i < nfsrv_lockhashsize; i++) { 6260 LIST_FOREACH_SAFE(lfp, &NFSD_VNET(nfslockhash)[i], lf_hash, 6261 nlfp) { 6262 printf("nfsd unload: fnd a lock file struct\n"); 6263 nfsrv_freenfslockfile(lfp); 6264 } 6265 } 6266 6267 /* And get rid of the deviceid structures and layouts. */ 6268 nfsrv_freealllayoutsanddevids(); 6269 } 6270 6271 /* 6272 * Check the sequence# for the session and slot provided as an argument. 6273 * Also, renew the lease if the session will return NFS_OK. 6274 */ 6275 int 6276 nfsrv_checksequence(struct nfsrv_descript *nd, uint32_t sequenceid, 6277 uint32_t *highest_slotidp, uint32_t *target_highest_slotidp, int cache_this, 6278 uint32_t *sflagsp, NFSPROC_T *p) 6279 { 6280 struct nfsdsession *sep; 6281 struct nfssessionhash *shp; 6282 int error; 6283 6284 shp = NFSSESSIONHASH(nd->nd_sessionid); 6285 NFSLOCKSESSION(shp); 6286 sep = nfsrv_findsession(nd->nd_sessionid); 6287 if (sep == NULL) { 6288 NFSUNLOCKSESSION(shp); 6289 return (NFSERR_BADSESSION); 6290 } 6291 error = nfsv4_seqsession(sequenceid, nd->nd_slotid, *highest_slotidp, 6292 sep->sess_slots, NULL, NFSV4_SLOTS - 1); 6293 if (error != 0) { 6294 NFSUNLOCKSESSION(shp); 6295 return (error); 6296 } 6297 if (cache_this != 0) 6298 nd->nd_flag |= ND_SAVEREPLY; 6299 /* Renew the lease. */ 6300 sep->sess_clp->lc_expiry = nfsrv_leaseexpiry(); 6301 nd->nd_clientid.qval = sep->sess_clp->lc_clientid.qval; 6302 nd->nd_flag |= ND_IMPLIEDCLID; 6303 6304 /* Save maximum request and reply sizes. */ 6305 nd->nd_maxreq = sep->sess_maxreq; 6306 nd->nd_maxresp = sep->sess_maxresp; 6307 6308 *sflagsp = 0; 6309 if (sep->sess_clp->lc_req.nr_client == NULL || 6310 (sep->sess_clp->lc_flags & LCL_CBDOWN) != 0) 6311 *sflagsp |= NFSV4SEQ_CBPATHDOWN; 6312 NFSUNLOCKSESSION(shp); 6313 if (error == NFSERR_EXPIRED) { 6314 *sflagsp |= NFSV4SEQ_EXPIREDALLSTATEREVOKED; 6315 error = 0; 6316 } else if (error == NFSERR_ADMINREVOKED) { 6317 *sflagsp |= NFSV4SEQ_ADMINSTATEREVOKED; 6318 error = 0; 6319 } 6320 *highest_slotidp = *target_highest_slotidp = NFSV4_SLOTS - 1; 6321 return (0); 6322 } 6323 6324 /* 6325 * Check/set reclaim complete for this session/clientid. 6326 */ 6327 int 6328 nfsrv_checkreclaimcomplete(struct nfsrv_descript *nd, int onefs) 6329 { 6330 struct nfsdsession *sep; 6331 struct nfssessionhash *shp; 6332 int error = 0; 6333 6334 shp = NFSSESSIONHASH(nd->nd_sessionid); 6335 NFSLOCKSTATE(); 6336 NFSLOCKSESSION(shp); 6337 sep = nfsrv_findsession(nd->nd_sessionid); 6338 if (sep == NULL) { 6339 NFSUNLOCKSESSION(shp); 6340 NFSUNLOCKSTATE(); 6341 return (NFSERR_BADSESSION); 6342 } 6343 6344 if (onefs != 0) 6345 sep->sess_clp->lc_flags |= LCL_RECLAIMONEFS; 6346 /* Check to see if reclaim complete has already happened. */ 6347 else if ((sep->sess_clp->lc_flags & LCL_RECLAIMCOMPLETE) != 0) 6348 error = NFSERR_COMPLETEALREADY; 6349 else { 6350 sep->sess_clp->lc_flags |= LCL_RECLAIMCOMPLETE; 6351 nfsrv_markreclaim(sep->sess_clp); 6352 } 6353 NFSUNLOCKSESSION(shp); 6354 NFSUNLOCKSTATE(); 6355 return (error); 6356 } 6357 6358 /* 6359 * Cache the reply in a session slot. 6360 */ 6361 void 6362 nfsrv_cache_session(struct nfsrv_descript *nd, struct mbuf **m) 6363 { 6364 struct nfsdsession *sep; 6365 struct nfssessionhash *shp; 6366 char *buf, *cp; 6367 #ifdef INET 6368 struct sockaddr_in *sin; 6369 #endif 6370 #ifdef INET6 6371 struct sockaddr_in6 *sin6; 6372 #endif 6373 6374 shp = NFSSESSIONHASH(nd->nd_sessionid); 6375 NFSLOCKSESSION(shp); 6376 sep = nfsrv_findsession(nd->nd_sessionid); 6377 if (sep == NULL) { 6378 NFSUNLOCKSESSION(shp); 6379 if ((NFSD_VNET(nfsrv_stablefirst).nsf_flags & 6380 NFSNSF_GRACEOVER) != 0) { 6381 buf = malloc(INET6_ADDRSTRLEN, M_TEMP, M_WAITOK); 6382 switch (nd->nd_nam->sa_family) { 6383 #ifdef INET 6384 case AF_INET: 6385 sin = (struct sockaddr_in *)nd->nd_nam; 6386 cp = inet_ntop(sin->sin_family, 6387 &sin->sin_addr.s_addr, buf, 6388 INET6_ADDRSTRLEN); 6389 break; 6390 #endif 6391 #ifdef INET6 6392 case AF_INET6: 6393 sin6 = (struct sockaddr_in6 *)nd->nd_nam; 6394 cp = inet_ntop(sin6->sin6_family, 6395 &sin6->sin6_addr, buf, INET6_ADDRSTRLEN); 6396 break; 6397 #endif 6398 default: 6399 cp = NULL; 6400 } 6401 if (cp != NULL) 6402 printf("nfsrv_cache_session: no session " 6403 "IPaddr=%s, check NFS clients for unique " 6404 "/etc/hostid's\n", cp); 6405 else 6406 printf("nfsrv_cache_session: no session, " 6407 "check NFS clients for unique " 6408 "/etc/hostid's\n"); 6409 free(buf, M_TEMP); 6410 } 6411 m_freem(*m); 6412 return; 6413 } 6414 nfsv4_seqsess_cacherep(nd->nd_slotid, sep->sess_slots, nd->nd_repstat, 6415 m); 6416 NFSUNLOCKSESSION(shp); 6417 } 6418 6419 /* 6420 * Search for a session that matches the sessionid. 6421 */ 6422 static struct nfsdsession * 6423 nfsrv_findsession(uint8_t *sessionid) 6424 { 6425 struct nfsdsession *sep; 6426 struct nfssessionhash *shp; 6427 6428 shp = NFSSESSIONHASH(sessionid); 6429 LIST_FOREACH(sep, &shp->list, sess_hash) { 6430 if (!NFSBCMP(sessionid, sep->sess_sessionid, NFSX_V4SESSIONID)) 6431 break; 6432 } 6433 return (sep); 6434 } 6435 6436 /* 6437 * Destroy a session. 6438 */ 6439 int 6440 nfsrv_destroysession(struct nfsrv_descript *nd, uint8_t *sessionid) 6441 { 6442 int error, igotlock, samesess; 6443 6444 samesess = 0; 6445 if (!NFSBCMP(sessionid, nd->nd_sessionid, NFSX_V4SESSIONID) && 6446 (nd->nd_flag & ND_HASSEQUENCE) != 0) { 6447 samesess = 1; 6448 if ((nd->nd_flag & ND_LASTOP) == 0) 6449 return (NFSERR_BADSESSION); 6450 } 6451 6452 /* Lock out other nfsd threads */ 6453 NFSLOCKV4ROOTMUTEX(); 6454 nfsv4_relref(&nfsv4rootfs_lock); 6455 do { 6456 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 6457 NFSV4ROOTLOCKMUTEXPTR, NULL); 6458 } while (igotlock == 0); 6459 NFSUNLOCKV4ROOTMUTEX(); 6460 6461 error = nfsrv_freesession(NULL, sessionid); 6462 if (error == 0 && samesess != 0) 6463 nd->nd_flag &= ~ND_HASSEQUENCE; 6464 6465 NFSLOCKV4ROOTMUTEX(); 6466 nfsv4_unlock(&nfsv4rootfs_lock, 1); 6467 NFSUNLOCKV4ROOTMUTEX(); 6468 return (error); 6469 } 6470 6471 /* 6472 * Bind a connection to a session. 6473 * For now, only certain variants are supported, since the current session 6474 * structure can only handle a single backchannel entry, which will be 6475 * applied to all connections if it is set. 6476 */ 6477 int 6478 nfsrv_bindconnsess(struct nfsrv_descript *nd, uint8_t *sessionid, int *foreaftp) 6479 { 6480 struct nfssessionhash *shp; 6481 struct nfsdsession *sep; 6482 struct nfsclient *clp; 6483 SVCXPRT *savxprt; 6484 int error; 6485 6486 error = 0; 6487 savxprt = NULL; 6488 shp = NFSSESSIONHASH(sessionid); 6489 NFSLOCKSTATE(); 6490 NFSLOCKSESSION(shp); 6491 sep = nfsrv_findsession(sessionid); 6492 if (sep != NULL) { 6493 clp = sep->sess_clp; 6494 if (*foreaftp == NFSCDFC4_BACK || 6495 *foreaftp == NFSCDFC4_BACK_OR_BOTH || 6496 *foreaftp == NFSCDFC4_FORE_OR_BOTH) { 6497 /* Try to set up a backchannel. */ 6498 if (clp->lc_req.nr_client == NULL) { 6499 NFSD_DEBUG(2, "nfsrv_bindconnsess: acquire " 6500 "backchannel\n"); 6501 clp->lc_req.nr_client = (struct __rpc_client *) 6502 clnt_bck_create(nd->nd_xprt->xp_socket, 6503 sep->sess_cbprogram, NFSV4_CBVERS); 6504 } 6505 if (clp->lc_req.nr_client != NULL) { 6506 NFSD_DEBUG(2, "nfsrv_bindconnsess: set up " 6507 "backchannel\n"); 6508 savxprt = sep->sess_cbsess.nfsess_xprt; 6509 SVC_ACQUIRE(nd->nd_xprt); 6510 CLNT_ACQUIRE(clp->lc_req.nr_client); 6511 nd->nd_xprt->xp_p2 = clp->lc_req.nr_client; 6512 /* Disable idle timeout. */ 6513 nd->nd_xprt->xp_idletimeout = 0; 6514 sep->sess_cbsess.nfsess_xprt = nd->nd_xprt; 6515 sep->sess_crflags |= NFSV4CRSESS_CONNBACKCHAN; 6516 clp->lc_flags |= LCL_DONEBINDCONN | 6517 LCL_NEEDSCBNULL; 6518 clp->lc_flags &= ~LCL_CBDOWN; 6519 if (*foreaftp == NFSCDFS4_BACK) 6520 *foreaftp = NFSCDFS4_BACK; 6521 else 6522 *foreaftp = NFSCDFS4_BOTH; 6523 } else if (*foreaftp != NFSCDFC4_BACK) { 6524 NFSD_DEBUG(2, "nfsrv_bindconnsess: can't set " 6525 "up backchannel\n"); 6526 sep->sess_crflags &= ~NFSV4CRSESS_CONNBACKCHAN; 6527 clp->lc_flags |= LCL_DONEBINDCONN; 6528 *foreaftp = NFSCDFS4_FORE; 6529 } else { 6530 error = NFSERR_NOTSUPP; 6531 printf("nfsrv_bindconnsess: Can't add " 6532 "backchannel\n"); 6533 } 6534 } else { 6535 NFSD_DEBUG(2, "nfsrv_bindconnsess: Set forechannel\n"); 6536 clp->lc_flags |= LCL_DONEBINDCONN; 6537 *foreaftp = NFSCDFS4_FORE; 6538 } 6539 } else 6540 error = NFSERR_BADSESSION; 6541 NFSUNLOCKSESSION(shp); 6542 NFSUNLOCKSTATE(); 6543 if (savxprt != NULL) 6544 SVC_RELEASE(savxprt); 6545 return (error); 6546 } 6547 6548 /* 6549 * Free up a session structure. 6550 */ 6551 static int 6552 nfsrv_freesession(struct nfsdsession *sep, uint8_t *sessionid) 6553 { 6554 struct nfssessionhash *shp; 6555 int i; 6556 6557 NFSLOCKSTATE(); 6558 if (sep == NULL) { 6559 shp = NFSSESSIONHASH(sessionid); 6560 NFSLOCKSESSION(shp); 6561 sep = nfsrv_findsession(sessionid); 6562 } else { 6563 shp = NFSSESSIONHASH(sep->sess_sessionid); 6564 NFSLOCKSESSION(shp); 6565 } 6566 if (sep != NULL) { 6567 sep->sess_refcnt--; 6568 if (sep->sess_refcnt > 0) { 6569 NFSUNLOCKSESSION(shp); 6570 NFSUNLOCKSTATE(); 6571 return (NFSERR_BACKCHANBUSY); 6572 } 6573 LIST_REMOVE(sep, sess_hash); 6574 LIST_REMOVE(sep, sess_list); 6575 } 6576 NFSUNLOCKSESSION(shp); 6577 NFSUNLOCKSTATE(); 6578 if (sep == NULL) 6579 return (NFSERR_BADSESSION); 6580 for (i = 0; i < NFSV4_SLOTS; i++) 6581 if (sep->sess_slots[i].nfssl_reply != NULL) 6582 m_freem(sep->sess_slots[i].nfssl_reply); 6583 if (sep->sess_cbsess.nfsess_xprt != NULL) 6584 SVC_RELEASE(sep->sess_cbsess.nfsess_xprt); 6585 free(sep, M_NFSDSESSION); 6586 return (0); 6587 } 6588 6589 /* 6590 * Free a stateid. 6591 * RFC5661 says that it should fail when there are associated opens, locks 6592 * or delegations. Since stateids represent opens, I don't see how you can 6593 * free an open stateid (it will be free'd when closed), so this function 6594 * only works for lock stateids (freeing the lock_owner) or delegations. 6595 */ 6596 int 6597 nfsrv_freestateid(struct nfsrv_descript *nd, nfsv4stateid_t *stateidp, 6598 NFSPROC_T *p) 6599 { 6600 struct nfsclient *clp; 6601 struct nfsstate *stp; 6602 int error; 6603 6604 NFSLOCKSTATE(); 6605 /* 6606 * Look up the stateid 6607 */ 6608 error = nfsrv_getclient((nfsquad_t)((u_quad_t)0), CLOPS_RENEW, &clp, 6609 NULL, (nfsquad_t)((u_quad_t)0), 0, nd, p); 6610 if (error == 0) { 6611 /* First, check for a delegation. */ 6612 LIST_FOREACH(stp, &clp->lc_deleg, ls_list) { 6613 if (!NFSBCMP(stp->ls_stateid.other, stateidp->other, 6614 NFSX_STATEIDOTHER)) 6615 break; 6616 } 6617 if (stp != NULL) { 6618 nfsrv_freedeleg(stp); 6619 NFSUNLOCKSTATE(); 6620 return (error); 6621 } 6622 } 6623 /* Not a delegation, try for a lock_owner. */ 6624 if (error == 0) 6625 error = nfsrv_getstate(clp, stateidp, 0, &stp); 6626 if (error == 0 && ((stp->ls_flags & (NFSLCK_OPEN | NFSLCK_DELEGREAD | 6627 NFSLCK_DELEGWRITE)) != 0 || (stp->ls_flags & NFSLCK_LOCK) == 0)) 6628 /* Not a lock_owner stateid. */ 6629 error = NFSERR_LOCKSHELD; 6630 if (error == 0 && !LIST_EMPTY(&stp->ls_lock)) 6631 error = NFSERR_LOCKSHELD; 6632 if (error == 0) 6633 nfsrv_freelockowner(stp, NULL, 0, p); 6634 NFSUNLOCKSTATE(); 6635 return (error); 6636 } 6637 6638 /* 6639 * Test a stateid. 6640 */ 6641 int 6642 nfsrv_teststateid(struct nfsrv_descript *nd, nfsv4stateid_t *stateidp, 6643 NFSPROC_T *p) 6644 { 6645 struct nfsclient *clp; 6646 struct nfsstate *stp; 6647 int error; 6648 6649 NFSLOCKSTATE(); 6650 /* 6651 * Look up the stateid 6652 */ 6653 error = nfsrv_getclient((nfsquad_t)((u_quad_t)0), CLOPS_RENEW, &clp, 6654 NULL, (nfsquad_t)((u_quad_t)0), 0, nd, p); 6655 if (error == 0) 6656 error = nfsrv_getstate(clp, stateidp, 0, &stp); 6657 if (error == 0 && stateidp->seqid != 0 && 6658 SEQ_LT(stateidp->seqid, stp->ls_stateid.seqid)) 6659 error = NFSERR_OLDSTATEID; 6660 NFSUNLOCKSTATE(); 6661 return (error); 6662 } 6663 6664 /* 6665 * Generate the xdr for an NFSv4.1 CBSequence Operation. 6666 */ 6667 static int 6668 nfsv4_setcbsequence(struct nfsrv_descript *nd, struct nfsclient *clp, 6669 int dont_replycache, struct nfsdsession **sepp, int *slotposp) 6670 { 6671 struct nfsdsession *sep; 6672 uint32_t *tl, slotseq = 0; 6673 int maxslot; 6674 uint8_t sessionid[NFSX_V4SESSIONID]; 6675 int error; 6676 6677 error = nfsv4_getcbsession(clp, sepp); 6678 if (error != 0) 6679 return (error); 6680 sep = *sepp; 6681 nfsv4_sequencelookup(NULL, &sep->sess_cbsess, slotposp, &maxslot, 6682 &slotseq, sessionid, true); 6683 KASSERT(maxslot >= 0, ("nfsv4_setcbsequence neg maxslot")); 6684 6685 /* Build the Sequence arguments. */ 6686 NFSM_BUILD(tl, uint32_t *, NFSX_V4SESSIONID + 5 * NFSX_UNSIGNED); 6687 bcopy(sessionid, tl, NFSX_V4SESSIONID); 6688 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED; 6689 nd->nd_slotseq = tl; 6690 nd->nd_slotid = *slotposp; 6691 nd->nd_flag |= ND_HASSLOTID; 6692 *tl++ = txdr_unsigned(slotseq); 6693 *tl++ = txdr_unsigned(*slotposp); 6694 *tl++ = txdr_unsigned(maxslot); 6695 if (dont_replycache == 0) 6696 *tl++ = newnfs_true; 6697 else 6698 *tl++ = newnfs_false; 6699 *tl = 0; /* No referring call list, for now. */ 6700 nd->nd_flag |= ND_HASSEQUENCE; 6701 return (0); 6702 } 6703 6704 /* 6705 * Get a session for the callback. 6706 */ 6707 static int 6708 nfsv4_getcbsession(struct nfsclient *clp, struct nfsdsession **sepp) 6709 { 6710 struct nfsdsession *sep; 6711 6712 NFSLOCKSTATE(); 6713 LIST_FOREACH(sep, &clp->lc_session, sess_list) { 6714 if ((sep->sess_crflags & NFSV4CRSESS_CONNBACKCHAN) != 0) 6715 break; 6716 } 6717 if (sep == NULL) { 6718 NFSUNLOCKSTATE(); 6719 return (NFSERR_BADSESSION); 6720 } 6721 sep->sess_refcnt++; 6722 *sepp = sep; 6723 NFSUNLOCKSTATE(); 6724 return (0); 6725 } 6726 6727 /* 6728 * Free up all backchannel xprts. This needs to be done when the nfsd threads 6729 * exit, since those transports will all be going away. 6730 * This is only called after all the nfsd threads are done performing RPCs, 6731 * so locking shouldn't be an issue. 6732 */ 6733 void 6734 nfsrv_freeallbackchannel_xprts(void) 6735 { 6736 struct nfsdsession *sep; 6737 struct nfsclient *clp; 6738 SVCXPRT *xprt; 6739 int i; 6740 6741 for (i = 0; i < nfsrv_clienthashsize; i++) { 6742 LIST_FOREACH(clp, &NFSD_VNET(nfsclienthash)[i], lc_hash) { 6743 LIST_FOREACH(sep, &clp->lc_session, sess_list) { 6744 xprt = sep->sess_cbsess.nfsess_xprt; 6745 sep->sess_cbsess.nfsess_xprt = NULL; 6746 if (xprt != NULL) 6747 SVC_RELEASE(xprt); 6748 } 6749 } 6750 } 6751 } 6752 6753 /* 6754 * Do a layout commit. Actually just call nfsrv_updatemdsattr(). 6755 * I have no idea if the rest of these arguments will ever be useful? 6756 */ 6757 int 6758 nfsrv_layoutcommit(struct nfsrv_descript *nd, vnode_t vp, int layouttype, 6759 int hasnewoff, uint64_t newoff, uint64_t offset, uint64_t len, 6760 int hasnewmtime, struct timespec *newmtimep, int reclaim, 6761 nfsv4stateid_t *stateidp, int maxcnt, char *layp, int *hasnewsizep, 6762 uint64_t *newsizep, struct ucred *cred, NFSPROC_T *p) 6763 { 6764 struct nfsvattr na; 6765 int error; 6766 6767 error = nfsrv_updatemdsattr(vp, &na, p); 6768 if (error == 0) { 6769 *hasnewsizep = 1; 6770 *newsizep = na.na_size; 6771 } 6772 return (error); 6773 } 6774 6775 /* 6776 * Try and get a layout. 6777 */ 6778 int 6779 nfsrv_layoutget(struct nfsrv_descript *nd, vnode_t vp, struct nfsexstuff *exp, 6780 int layouttype, int *iomode, uint64_t *offset, uint64_t *len, 6781 uint64_t minlen, nfsv4stateid_t *stateidp, int maxcnt, int *retonclose, 6782 int *layoutlenp, char *layp, struct ucred *cred, NFSPROC_T *p) 6783 { 6784 struct nfslayouthash *lhyp; 6785 struct nfslayout *lyp; 6786 char *devid; 6787 fhandle_t fh, *dsfhp; 6788 int error, mirrorcnt; 6789 6790 if (nfsrv_devidcnt == 0) 6791 return (NFSERR_UNKNLAYOUTTYPE); 6792 6793 if (*offset != 0) 6794 printf("nfsrv_layoutget: off=%ju len=%ju\n", (uintmax_t)*offset, 6795 (uintmax_t)*len); 6796 error = nfsvno_getfh(vp, &fh, p); 6797 NFSD_DEBUG(4, "layoutget getfh=%d\n", error); 6798 if (error != 0) 6799 return (error); 6800 6801 /* 6802 * For now, all layouts are for entire files. 6803 * Only issue Read/Write layouts if requested for a non-readonly fs. 6804 */ 6805 if (NFSVNO_EXRDONLY(exp)) { 6806 if (*iomode == NFSLAYOUTIOMODE_RW) 6807 return (NFSERR_LAYOUTTRYLATER); 6808 *iomode = NFSLAYOUTIOMODE_READ; 6809 } 6810 if (*iomode != NFSLAYOUTIOMODE_RW) 6811 *iomode = NFSLAYOUTIOMODE_READ; 6812 6813 /* 6814 * Check to see if a write layout can be issued for this file. 6815 * This is used during mirror recovery to avoid RW layouts being 6816 * issued for a file while it is being copied to the recovered 6817 * mirror. 6818 */ 6819 if (*iomode == NFSLAYOUTIOMODE_RW && nfsrv_dontlayout(&fh) != 0) 6820 return (NFSERR_LAYOUTTRYLATER); 6821 6822 *retonclose = 0; 6823 *offset = 0; 6824 *len = UINT64_MAX; 6825 6826 /* First, see if a layout already exists and return if found. */ 6827 lhyp = NFSLAYOUTHASH(&fh); 6828 NFSLOCKLAYOUT(lhyp); 6829 error = nfsrv_findlayout(&nd->nd_clientid, &fh, layouttype, p, &lyp); 6830 NFSD_DEBUG(4, "layoutget findlay=%d\n", error); 6831 /* 6832 * Not sure if the seqid must be the same, so I won't check it. 6833 */ 6834 if (error == 0 && (stateidp->other[0] != lyp->lay_stateid.other[0] || 6835 stateidp->other[1] != lyp->lay_stateid.other[1] || 6836 stateidp->other[2] != lyp->lay_stateid.other[2])) { 6837 if ((lyp->lay_flags & NFSLAY_CALLB) == 0) { 6838 NFSUNLOCKLAYOUT(lhyp); 6839 NFSD_DEBUG(1, "ret bad stateid\n"); 6840 return (NFSERR_BADSTATEID); 6841 } 6842 /* 6843 * I believe we get here because there is a race between 6844 * the client processing the CBLAYOUTRECALL and the layout 6845 * being deleted here on the server. 6846 * The client has now done a LayoutGet with a non-layout 6847 * stateid, as it would when there is no layout. 6848 * As such, free this layout and set error == NFSERR_BADSTATEID 6849 * so the code below will create a new layout structure as 6850 * would happen if no layout was found. 6851 * "lyp" will be set before being used below, but set it NULL 6852 * as a safety belt. 6853 */ 6854 nfsrv_freelayout(&lhyp->list, lyp); 6855 lyp = NULL; 6856 error = NFSERR_BADSTATEID; 6857 } 6858 if (error == 0) { 6859 if (lyp->lay_layoutlen > maxcnt) { 6860 NFSUNLOCKLAYOUT(lhyp); 6861 NFSD_DEBUG(1, "ret layout too small\n"); 6862 return (NFSERR_TOOSMALL); 6863 } 6864 if (*iomode == NFSLAYOUTIOMODE_RW) { 6865 if ((lyp->lay_flags & NFSLAY_NOSPC) != 0) { 6866 NFSUNLOCKLAYOUT(lhyp); 6867 NFSD_DEBUG(1, "ret layout nospace\n"); 6868 return (NFSERR_NOSPC); 6869 } 6870 lyp->lay_flags |= NFSLAY_RW; 6871 } else 6872 lyp->lay_flags |= NFSLAY_READ; 6873 NFSBCOPY(lyp->lay_xdr, layp, lyp->lay_layoutlen); 6874 *layoutlenp = lyp->lay_layoutlen; 6875 if (++lyp->lay_stateid.seqid == 0) 6876 lyp->lay_stateid.seqid = 1; 6877 stateidp->seqid = lyp->lay_stateid.seqid; 6878 NFSUNLOCKLAYOUT(lhyp); 6879 NFSD_DEBUG(4, "ret fnd layout\n"); 6880 return (0); 6881 } 6882 NFSUNLOCKLAYOUT(lhyp); 6883 6884 /* Find the device id and file handle. */ 6885 dsfhp = malloc(sizeof(fhandle_t) * NFSDEV_MAXMIRRORS, M_TEMP, M_WAITOK); 6886 devid = malloc(NFSX_V4DEVICEID * NFSDEV_MAXMIRRORS, M_TEMP, M_WAITOK); 6887 error = nfsrv_dsgetdevandfh(vp, p, &mirrorcnt, dsfhp, devid); 6888 NFSD_DEBUG(4, "layoutget devandfh=%d\n", error); 6889 if (error == 0) { 6890 if (layouttype == NFSLAYOUT_NFSV4_1_FILES) { 6891 if (NFSX_V4FILELAYOUT > maxcnt) 6892 error = NFSERR_TOOSMALL; 6893 else 6894 lyp = nfsrv_filelayout(nd, *iomode, &fh, dsfhp, 6895 devid, vp->v_mount->mnt_stat.f_fsid); 6896 } else { 6897 if (NFSX_V4FLEXLAYOUT(mirrorcnt) > maxcnt) 6898 error = NFSERR_TOOSMALL; 6899 else 6900 lyp = nfsrv_flexlayout(nd, *iomode, mirrorcnt, 6901 &fh, dsfhp, devid, 6902 vp->v_mount->mnt_stat.f_fsid); 6903 } 6904 } 6905 free(dsfhp, M_TEMP); 6906 free(devid, M_TEMP); 6907 if (error != 0) 6908 return (error); 6909 6910 /* 6911 * Now, add this layout to the list. 6912 */ 6913 error = nfsrv_addlayout(nd, &lyp, stateidp, layp, layoutlenp, p); 6914 NFSD_DEBUG(4, "layoutget addl=%d\n", error); 6915 /* 6916 * The lyp will be set to NULL by nfsrv_addlayout() if it 6917 * linked the new structure into the lists. 6918 */ 6919 free(lyp, M_NFSDSTATE); 6920 return (error); 6921 } 6922 6923 /* 6924 * Generate a File Layout. 6925 */ 6926 static struct nfslayout * 6927 nfsrv_filelayout(struct nfsrv_descript *nd, int iomode, fhandle_t *fhp, 6928 fhandle_t *dsfhp, char *devid, fsid_t fs) 6929 { 6930 uint32_t *tl; 6931 struct nfslayout *lyp; 6932 uint64_t pattern_offset; 6933 6934 lyp = malloc(sizeof(struct nfslayout) + NFSX_V4FILELAYOUT, M_NFSDSTATE, 6935 M_WAITOK | M_ZERO); 6936 lyp->lay_type = NFSLAYOUT_NFSV4_1_FILES; 6937 if (iomode == NFSLAYOUTIOMODE_RW) 6938 lyp->lay_flags = NFSLAY_RW; 6939 else 6940 lyp->lay_flags = NFSLAY_READ; 6941 NFSBCOPY(fhp, &lyp->lay_fh, sizeof(*fhp)); 6942 lyp->lay_clientid.qval = nd->nd_clientid.qval; 6943 lyp->lay_fsid = fs; 6944 NFSBCOPY(devid, lyp->lay_deviceid, NFSX_V4DEVICEID); 6945 6946 /* Fill in the xdr for the files layout. */ 6947 tl = (uint32_t *)lyp->lay_xdr; 6948 NFSBCOPY(devid, tl, NFSX_V4DEVICEID); /* Device ID. */ 6949 tl += (NFSX_V4DEVICEID / NFSX_UNSIGNED); 6950 6951 /* Set the stripe size to the maximum I/O size. */ 6952 *tl++ = txdr_unsigned(nfs_srvmaxio & NFSFLAYUTIL_STRIPE_MASK); 6953 *tl++ = 0; /* 1st stripe index. */ 6954 pattern_offset = 0; 6955 txdr_hyper(pattern_offset, tl); tl += 2; /* Pattern offset. */ 6956 *tl++ = txdr_unsigned(1); /* 1 file handle. */ 6957 *tl++ = txdr_unsigned(NFSX_V4PNFSFH); 6958 NFSBCOPY(dsfhp, tl, sizeof(*dsfhp)); 6959 lyp->lay_layoutlen = NFSX_V4FILELAYOUT; 6960 return (lyp); 6961 } 6962 6963 #define FLEX_OWNERID "999" 6964 #define FLEX_UID0 "0" 6965 /* 6966 * Generate a Flex File Layout. 6967 * The FLEX_OWNERID can be any string of 3 decimal digits. Although this 6968 * string goes on the wire, it isn't supposed to be used by the client, 6969 * since this server uses tight coupling. 6970 * Although not recommended by the spec., if vfs.nfsd.flexlinuxhack=1 use 6971 * a string of "0". This works around the Linux Flex File Layout driver bug 6972 * which uses the synthetic uid/gid strings for the "tightly coupled" case. 6973 */ 6974 static struct nfslayout * 6975 nfsrv_flexlayout(struct nfsrv_descript *nd, int iomode, int mirrorcnt, 6976 fhandle_t *fhp, fhandle_t *dsfhp, char *devid, fsid_t fs) 6977 { 6978 uint32_t *tl; 6979 struct nfslayout *lyp; 6980 uint64_t lenval; 6981 int i; 6982 6983 lyp = malloc(sizeof(struct nfslayout) + NFSX_V4FLEXLAYOUT(mirrorcnt), 6984 M_NFSDSTATE, M_WAITOK | M_ZERO); 6985 lyp->lay_type = NFSLAYOUT_FLEXFILE; 6986 if (iomode == NFSLAYOUTIOMODE_RW) 6987 lyp->lay_flags = NFSLAY_RW; 6988 else 6989 lyp->lay_flags = NFSLAY_READ; 6990 NFSBCOPY(fhp, &lyp->lay_fh, sizeof(*fhp)); 6991 lyp->lay_clientid.qval = nd->nd_clientid.qval; 6992 lyp->lay_fsid = fs; 6993 lyp->lay_mirrorcnt = mirrorcnt; 6994 NFSBCOPY(devid, lyp->lay_deviceid, NFSX_V4DEVICEID); 6995 6996 /* Fill in the xdr for the files layout. */ 6997 tl = (uint32_t *)lyp->lay_xdr; 6998 lenval = 0; 6999 txdr_hyper(lenval, tl); tl += 2; /* Stripe unit. */ 7000 *tl++ = txdr_unsigned(mirrorcnt); /* # of mirrors. */ 7001 for (i = 0; i < mirrorcnt; i++) { 7002 *tl++ = txdr_unsigned(1); /* One stripe. */ 7003 NFSBCOPY(devid, tl, NFSX_V4DEVICEID); /* Device ID. */ 7004 tl += (NFSX_V4DEVICEID / NFSX_UNSIGNED); 7005 devid += NFSX_V4DEVICEID; 7006 *tl++ = txdr_unsigned(1); /* Efficiency. */ 7007 *tl++ = 0; /* Proxy Stateid. */ 7008 *tl++ = 0x55555555; 7009 *tl++ = 0x55555555; 7010 *tl++ = 0x55555555; 7011 *tl++ = txdr_unsigned(1); /* 1 file handle. */ 7012 *tl++ = txdr_unsigned(NFSX_V4PNFSFH); 7013 NFSBCOPY(dsfhp, tl, sizeof(*dsfhp)); 7014 tl += (NFSM_RNDUP(NFSX_V4PNFSFH) / NFSX_UNSIGNED); 7015 dsfhp++; 7016 if (nfsrv_flexlinuxhack != 0) { 7017 *tl++ = txdr_unsigned(strlen(FLEX_UID0)); 7018 *tl = 0; /* 0 pad string. */ 7019 NFSBCOPY(FLEX_UID0, tl++, strlen(FLEX_UID0)); 7020 *tl++ = txdr_unsigned(strlen(FLEX_UID0)); 7021 *tl = 0; /* 0 pad string. */ 7022 NFSBCOPY(FLEX_UID0, tl++, strlen(FLEX_UID0)); 7023 } else { 7024 *tl++ = txdr_unsigned(strlen(FLEX_OWNERID)); 7025 NFSBCOPY(FLEX_OWNERID, tl++, NFSX_UNSIGNED); 7026 *tl++ = txdr_unsigned(strlen(FLEX_OWNERID)); 7027 NFSBCOPY(FLEX_OWNERID, tl++, NFSX_UNSIGNED); 7028 } 7029 } 7030 *tl++ = txdr_unsigned(0); /* ff_flags. */ 7031 *tl = txdr_unsigned(60); /* Status interval hint. */ 7032 lyp->lay_layoutlen = NFSX_V4FLEXLAYOUT(mirrorcnt); 7033 return (lyp); 7034 } 7035 7036 /* 7037 * Parse and process Flex File errors returned via LayoutReturn. 7038 */ 7039 static void 7040 nfsrv_flexlayouterr(struct nfsrv_descript *nd, uint32_t *layp, int maxcnt, 7041 NFSPROC_T *p) 7042 { 7043 uint32_t *tl; 7044 int cnt, errcnt, i, j, opnum, stat; 7045 char devid[NFSX_V4DEVICEID]; 7046 7047 tl = layp; 7048 maxcnt -= NFSX_UNSIGNED; 7049 if (maxcnt > 0) 7050 cnt = fxdr_unsigned(int, *tl++); 7051 else 7052 cnt = 0; 7053 NFSD_DEBUG(4, "flexlayouterr cnt=%d\n", cnt); 7054 for (i = 0; i < cnt; i++) { 7055 maxcnt -= NFSX_STATEID + 2 * NFSX_HYPER + 7056 NFSX_UNSIGNED; 7057 if (maxcnt <= 0) 7058 break; 7059 /* Skip offset, length and stateid for now. */ 7060 tl += (4 + NFSX_STATEID / NFSX_UNSIGNED); 7061 errcnt = fxdr_unsigned(int, *tl++); 7062 NFSD_DEBUG(4, "flexlayouterr errcnt=%d\n", errcnt); 7063 for (j = 0; j < errcnt; j++) { 7064 maxcnt -= NFSX_V4DEVICEID + 2 * NFSX_UNSIGNED; 7065 if (maxcnt < 0) 7066 break; 7067 NFSBCOPY(tl, devid, NFSX_V4DEVICEID); 7068 tl += (NFSX_V4DEVICEID / NFSX_UNSIGNED); 7069 stat = fxdr_unsigned(int, *tl++); 7070 opnum = fxdr_unsigned(int, *tl++); 7071 NFSD_DEBUG(4, "flexlayouterr op=%d stat=%d\n", opnum, 7072 stat); 7073 /* 7074 * Except for NFSERR_ACCES, NFSERR_STALE and 7075 * NFSERR_NOSPC errors, disable the mirror. 7076 */ 7077 if (stat != NFSERR_ACCES && stat != NFSERR_STALE && 7078 stat != NFSERR_NOSPC) 7079 nfsrv_delds(devid, p); 7080 7081 /* For NFSERR_NOSPC, mark all devids and layouts. */ 7082 if (stat == NFSERR_NOSPC) 7083 nfsrv_marknospc(devid, true); 7084 } 7085 } 7086 } 7087 7088 /* 7089 * This function removes all flex file layouts which has a mirror with 7090 * a device id that matches the argument. 7091 * Called when the DS represented by the device id has failed. 7092 */ 7093 void 7094 nfsrv_flexmirrordel(char *devid, NFSPROC_T *p) 7095 { 7096 uint32_t *tl; 7097 struct nfslayout *lyp, *nlyp; 7098 struct nfslayouthash *lhyp; 7099 struct nfslayouthead loclyp; 7100 int i, j; 7101 7102 NFSD_DEBUG(4, "flexmirrordel\n"); 7103 /* Move all layouts found onto a local list. */ 7104 TAILQ_INIT(&loclyp); 7105 for (i = 0; i < nfsrv_layouthashsize; i++) { 7106 lhyp = &nfslayouthash[i]; 7107 NFSLOCKLAYOUT(lhyp); 7108 TAILQ_FOREACH_SAFE(lyp, &lhyp->list, lay_list, nlyp) { 7109 if (lyp->lay_type == NFSLAYOUT_FLEXFILE && 7110 lyp->lay_mirrorcnt > 1) { 7111 NFSD_DEBUG(4, "possible match\n"); 7112 tl = lyp->lay_xdr; 7113 tl += 3; 7114 for (j = 0; j < lyp->lay_mirrorcnt; j++) { 7115 tl++; 7116 if (NFSBCMP(devid, tl, NFSX_V4DEVICEID) 7117 == 0) { 7118 /* Found one. */ 7119 NFSD_DEBUG(4, "fnd one\n"); 7120 TAILQ_REMOVE(&lhyp->list, lyp, 7121 lay_list); 7122 TAILQ_INSERT_HEAD(&loclyp, lyp, 7123 lay_list); 7124 break; 7125 } 7126 tl += (NFSX_V4DEVICEID / NFSX_UNSIGNED + 7127 NFSM_RNDUP(NFSX_V4PNFSFH) / 7128 NFSX_UNSIGNED + 11 * NFSX_UNSIGNED); 7129 } 7130 } 7131 } 7132 NFSUNLOCKLAYOUT(lhyp); 7133 } 7134 7135 /* Now, try to do a Layout recall for each one found. */ 7136 TAILQ_FOREACH_SAFE(lyp, &loclyp, lay_list, nlyp) { 7137 NFSD_DEBUG(4, "do layout recall\n"); 7138 /* 7139 * The layout stateid.seqid needs to be incremented 7140 * before doing a LAYOUT_RECALL callback. 7141 */ 7142 if (++lyp->lay_stateid.seqid == 0) 7143 lyp->lay_stateid.seqid = 1; 7144 nfsrv_recalllayout(lyp->lay_clientid, &lyp->lay_stateid, 7145 &lyp->lay_fh, lyp, 1, lyp->lay_type, p); 7146 nfsrv_freelayout(&loclyp, lyp); 7147 } 7148 } 7149 7150 /* 7151 * Do a recall callback to the client for this layout. 7152 */ 7153 static int 7154 nfsrv_recalllayout(nfsquad_t clid, nfsv4stateid_t *stateidp, fhandle_t *fhp, 7155 struct nfslayout *lyp, int changed, int laytype, NFSPROC_T *p) 7156 { 7157 struct nfsclient *clp; 7158 int error; 7159 7160 NFSD_DEBUG(4, "nfsrv_recalllayout\n"); 7161 error = nfsrv_getclient(clid, 0, &clp, NULL, (nfsquad_t)((u_quad_t)0), 7162 0, NULL, p); 7163 NFSD_DEBUG(4, "aft nfsrv_getclient=%d\n", error); 7164 if (error != 0) { 7165 printf("nfsrv_recalllayout: getclient err=%d\n", error); 7166 return (error); 7167 } 7168 if ((clp->lc_flags & LCL_NFSV41) != 0) { 7169 error = nfsrv_docallback(clp, NFSV4OP_CBLAYOUTRECALL, 7170 stateidp, changed, fhp, NULL, NULL, laytype, p); 7171 /* If lyp != NULL, handle an error return here. */ 7172 if (error != 0 && lyp != NULL) { 7173 NFSDRECALLLOCK(); 7174 /* 7175 * Mark it returned, since no layout recall 7176 * has been done. 7177 * All errors seem to be non-recoverable, although 7178 * NFSERR_NOMATCHLAYOUT is a normal event. 7179 */ 7180 if ((lyp->lay_flags & NFSLAY_RECALL) != 0) { 7181 lyp->lay_flags |= NFSLAY_RETURNED; 7182 wakeup(lyp); 7183 } 7184 NFSDRECALLUNLOCK(); 7185 if (error != NFSERR_NOMATCHLAYOUT) 7186 printf("nfsrv_recalllayout: err=%d\n", error); 7187 } 7188 } else 7189 printf("nfsrv_recalllayout: clp not NFSv4.1\n"); 7190 return (error); 7191 } 7192 7193 /* 7194 * Find a layout to recall when we exceed our high water mark. 7195 */ 7196 void 7197 nfsrv_recalloldlayout(NFSPROC_T *p) 7198 { 7199 struct nfslayouthash *lhyp; 7200 struct nfslayout *lyp; 7201 nfsquad_t clientid; 7202 nfsv4stateid_t stateid; 7203 fhandle_t fh; 7204 int error, laytype = 0, ret; 7205 7206 lhyp = &nfslayouthash[arc4random() % nfsrv_layouthashsize]; 7207 NFSLOCKLAYOUT(lhyp); 7208 TAILQ_FOREACH_REVERSE(lyp, &lhyp->list, nfslayouthead, lay_list) { 7209 if ((lyp->lay_flags & NFSLAY_CALLB) == 0) { 7210 lyp->lay_flags |= NFSLAY_CALLB; 7211 /* 7212 * The layout stateid.seqid needs to be incremented 7213 * before doing a LAYOUT_RECALL callback. 7214 */ 7215 if (++lyp->lay_stateid.seqid == 0) 7216 lyp->lay_stateid.seqid = 1; 7217 clientid = lyp->lay_clientid; 7218 stateid = lyp->lay_stateid; 7219 NFSBCOPY(&lyp->lay_fh, &fh, sizeof(fh)); 7220 laytype = lyp->lay_type; 7221 break; 7222 } 7223 } 7224 NFSUNLOCKLAYOUT(lhyp); 7225 if (lyp != NULL) { 7226 error = nfsrv_recalllayout(clientid, &stateid, &fh, NULL, 0, 7227 laytype, p); 7228 if (error != 0 && error != NFSERR_NOMATCHLAYOUT) 7229 NFSD_DEBUG(4, "recallold=%d\n", error); 7230 if (error != 0) { 7231 NFSLOCKLAYOUT(lhyp); 7232 /* 7233 * Since the hash list was unlocked, we need to 7234 * find it again. 7235 */ 7236 ret = nfsrv_findlayout(&clientid, &fh, laytype, p, 7237 &lyp); 7238 if (ret == 0 && 7239 (lyp->lay_flags & NFSLAY_CALLB) != 0 && 7240 lyp->lay_stateid.other[0] == stateid.other[0] && 7241 lyp->lay_stateid.other[1] == stateid.other[1] && 7242 lyp->lay_stateid.other[2] == stateid.other[2]) { 7243 /* 7244 * The client no longer knows this layout, so 7245 * it can be free'd now. 7246 */ 7247 if (error == NFSERR_NOMATCHLAYOUT) 7248 nfsrv_freelayout(&lhyp->list, lyp); 7249 else { 7250 /* 7251 * Leave it to be tried later by 7252 * clearing NFSLAY_CALLB and moving 7253 * it to the head of the list, so it 7254 * won't be tried again for a while. 7255 */ 7256 lyp->lay_flags &= ~NFSLAY_CALLB; 7257 TAILQ_REMOVE(&lhyp->list, lyp, 7258 lay_list); 7259 TAILQ_INSERT_HEAD(&lhyp->list, lyp, 7260 lay_list); 7261 } 7262 } 7263 NFSUNLOCKLAYOUT(lhyp); 7264 } 7265 } 7266 } 7267 7268 /* 7269 * Try and return layout(s). 7270 */ 7271 int 7272 nfsrv_layoutreturn(struct nfsrv_descript *nd, vnode_t vp, 7273 int layouttype, int iomode, uint64_t offset, uint64_t len, int reclaim, 7274 int kind, nfsv4stateid_t *stateidp, int maxcnt, uint32_t *layp, int *fndp, 7275 struct ucred *cred, NFSPROC_T *p) 7276 { 7277 struct nfsvattr na; 7278 struct nfslayouthash *lhyp; 7279 struct nfslayout *lyp; 7280 fhandle_t fh; 7281 int error = 0; 7282 7283 *fndp = 0; 7284 if (kind == NFSV4LAYOUTRET_FILE) { 7285 error = nfsvno_getfh(vp, &fh, p); 7286 if (error == 0) { 7287 error = nfsrv_updatemdsattr(vp, &na, p); 7288 if (error != 0) 7289 printf("nfsrv_layoutreturn: updatemdsattr" 7290 " failed=%d\n", error); 7291 } 7292 if (error == 0) { 7293 if (reclaim == newnfs_true) { 7294 error = nfsrv_checkgrace(NULL, NULL, 7295 NFSLCK_RECLAIM); 7296 if (error != NFSERR_NOGRACE) 7297 error = 0; 7298 return (error); 7299 } 7300 lhyp = NFSLAYOUTHASH(&fh); 7301 NFSDRECALLLOCK(); 7302 NFSLOCKLAYOUT(lhyp); 7303 error = nfsrv_findlayout(&nd->nd_clientid, &fh, 7304 layouttype, p, &lyp); 7305 NFSD_DEBUG(4, "layoutret findlay=%d\n", error); 7306 if (error == 0 && 7307 stateidp->other[0] == lyp->lay_stateid.other[0] && 7308 stateidp->other[1] == lyp->lay_stateid.other[1] && 7309 stateidp->other[2] == lyp->lay_stateid.other[2]) { 7310 NFSD_DEBUG(4, "nfsrv_layoutreturn: stateid %d" 7311 " %x %x %x laystateid %d %x %x %x" 7312 " off=%ju len=%ju flgs=0x%x\n", 7313 stateidp->seqid, stateidp->other[0], 7314 stateidp->other[1], stateidp->other[2], 7315 lyp->lay_stateid.seqid, 7316 lyp->lay_stateid.other[0], 7317 lyp->lay_stateid.other[1], 7318 lyp->lay_stateid.other[2], 7319 (uintmax_t)offset, (uintmax_t)len, 7320 lyp->lay_flags); 7321 if (++lyp->lay_stateid.seqid == 0) 7322 lyp->lay_stateid.seqid = 1; 7323 stateidp->seqid = lyp->lay_stateid.seqid; 7324 if (offset == 0 && len == UINT64_MAX) { 7325 if ((iomode & NFSLAYOUTIOMODE_READ) != 7326 0) 7327 lyp->lay_flags &= ~NFSLAY_READ; 7328 if ((iomode & NFSLAYOUTIOMODE_RW) != 0) 7329 lyp->lay_flags &= ~NFSLAY_RW; 7330 if ((lyp->lay_flags & (NFSLAY_READ | 7331 NFSLAY_RW)) == 0) 7332 nfsrv_freelayout(&lhyp->list, 7333 lyp); 7334 else 7335 *fndp = 1; 7336 } else 7337 *fndp = 1; 7338 } 7339 NFSUNLOCKLAYOUT(lhyp); 7340 /* Search the nfsrv_recalllist for a match. */ 7341 TAILQ_FOREACH(lyp, &nfsrv_recalllisthead, lay_list) { 7342 if (NFSBCMP(&lyp->lay_fh, &fh, 7343 sizeof(fh)) == 0 && 7344 lyp->lay_clientid.qval == 7345 nd->nd_clientid.qval && 7346 stateidp->other[0] == 7347 lyp->lay_stateid.other[0] && 7348 stateidp->other[1] == 7349 lyp->lay_stateid.other[1] && 7350 stateidp->other[2] == 7351 lyp->lay_stateid.other[2]) { 7352 lyp->lay_flags |= NFSLAY_RETURNED; 7353 wakeup(lyp); 7354 error = 0; 7355 } 7356 } 7357 NFSDRECALLUNLOCK(); 7358 } 7359 if (layouttype == NFSLAYOUT_FLEXFILE && layp != NULL) 7360 nfsrv_flexlayouterr(nd, layp, maxcnt, p); 7361 } else if (kind == NFSV4LAYOUTRET_FSID) 7362 nfsrv_freelayouts(&nd->nd_clientid, 7363 &vp->v_mount->mnt_stat.f_fsid, layouttype, iomode); 7364 else if (kind == NFSV4LAYOUTRET_ALL) 7365 nfsrv_freelayouts(&nd->nd_clientid, NULL, layouttype, iomode); 7366 else 7367 error = NFSERR_INVAL; 7368 if (error == -1) 7369 error = 0; 7370 return (error); 7371 } 7372 7373 /* 7374 * Look for an existing layout. 7375 */ 7376 static int 7377 nfsrv_findlayout(nfsquad_t *clientidp, fhandle_t *fhp, int laytype, 7378 NFSPROC_T *p, struct nfslayout **lypp) 7379 { 7380 struct nfslayouthash *lhyp; 7381 struct nfslayout *lyp; 7382 int ret; 7383 7384 *lypp = NULL; 7385 ret = 0; 7386 lhyp = NFSLAYOUTHASH(fhp); 7387 TAILQ_FOREACH(lyp, &lhyp->list, lay_list) { 7388 if (NFSBCMP(&lyp->lay_fh, fhp, sizeof(*fhp)) == 0 && 7389 lyp->lay_clientid.qval == clientidp->qval && 7390 lyp->lay_type == laytype) 7391 break; 7392 } 7393 if (lyp != NULL) 7394 *lypp = lyp; 7395 else 7396 ret = -1; 7397 return (ret); 7398 } 7399 7400 /* 7401 * Add the new layout, as required. 7402 */ 7403 static int 7404 nfsrv_addlayout(struct nfsrv_descript *nd, struct nfslayout **lypp, 7405 nfsv4stateid_t *stateidp, char *layp, int *layoutlenp, NFSPROC_T *p) 7406 { 7407 struct nfsclient *clp; 7408 struct nfslayouthash *lhyp; 7409 struct nfslayout *lyp, *nlyp; 7410 fhandle_t *fhp; 7411 int error; 7412 7413 KASSERT((nd->nd_flag & ND_IMPLIEDCLID) != 0, 7414 ("nfsrv_layoutget: no nd_clientid\n")); 7415 lyp = *lypp; 7416 fhp = &lyp->lay_fh; 7417 NFSLOCKSTATE(); 7418 error = nfsrv_getclient((nfsquad_t)((u_quad_t)0), CLOPS_RENEW, &clp, 7419 NULL, (nfsquad_t)((u_quad_t)0), 0, nd, p); 7420 if (error != 0) { 7421 NFSUNLOCKSTATE(); 7422 return (error); 7423 } 7424 lyp->lay_stateid.seqid = stateidp->seqid = 1; 7425 lyp->lay_stateid.other[0] = stateidp->other[0] = 7426 clp->lc_clientid.lval[0]; 7427 lyp->lay_stateid.other[1] = stateidp->other[1] = 7428 clp->lc_clientid.lval[1]; 7429 lyp->lay_stateid.other[2] = stateidp->other[2] = 7430 nfsrv_nextstateindex(clp); 7431 NFSUNLOCKSTATE(); 7432 7433 lhyp = NFSLAYOUTHASH(fhp); 7434 NFSLOCKLAYOUT(lhyp); 7435 TAILQ_FOREACH(nlyp, &lhyp->list, lay_list) { 7436 if (NFSBCMP(&nlyp->lay_fh, fhp, sizeof(*fhp)) == 0 && 7437 nlyp->lay_clientid.qval == nd->nd_clientid.qval) 7438 break; 7439 } 7440 if (nlyp != NULL) { 7441 /* A layout already exists, so use it. */ 7442 nlyp->lay_flags |= (lyp->lay_flags & (NFSLAY_READ | NFSLAY_RW)); 7443 NFSBCOPY(nlyp->lay_xdr, layp, nlyp->lay_layoutlen); 7444 *layoutlenp = nlyp->lay_layoutlen; 7445 if (++nlyp->lay_stateid.seqid == 0) 7446 nlyp->lay_stateid.seqid = 1; 7447 stateidp->seqid = nlyp->lay_stateid.seqid; 7448 stateidp->other[0] = nlyp->lay_stateid.other[0]; 7449 stateidp->other[1] = nlyp->lay_stateid.other[1]; 7450 stateidp->other[2] = nlyp->lay_stateid.other[2]; 7451 NFSUNLOCKLAYOUT(lhyp); 7452 return (0); 7453 } 7454 7455 /* Insert the new layout in the lists. */ 7456 *lypp = NULL; 7457 atomic_add_int(&nfsrv_layoutcnt, 1); 7458 NFSD_VNET(nfsstatsv1_p)->srvlayouts++; 7459 NFSBCOPY(lyp->lay_xdr, layp, lyp->lay_layoutlen); 7460 *layoutlenp = lyp->lay_layoutlen; 7461 TAILQ_INSERT_HEAD(&lhyp->list, lyp, lay_list); 7462 NFSUNLOCKLAYOUT(lhyp); 7463 return (0); 7464 } 7465 7466 /* 7467 * Get the devinfo for a deviceid. 7468 */ 7469 int 7470 nfsrv_getdevinfo(char *devid, int layouttype, uint32_t *maxcnt, 7471 uint32_t *notify, int *devaddrlen, char **devaddr) 7472 { 7473 struct nfsdevice *ds; 7474 7475 if ((layouttype != NFSLAYOUT_NFSV4_1_FILES && layouttype != 7476 NFSLAYOUT_FLEXFILE) || 7477 (nfsrv_maxpnfsmirror > 1 && layouttype == NFSLAYOUT_NFSV4_1_FILES)) 7478 return (NFSERR_UNKNLAYOUTTYPE); 7479 7480 /* 7481 * Now, search for the device id. Note that the structures won't go 7482 * away, but the order changes in the list. As such, the lock only 7483 * needs to be held during the search through the list. 7484 */ 7485 NFSDDSLOCK(); 7486 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 7487 if (NFSBCMP(devid, ds->nfsdev_deviceid, NFSX_V4DEVICEID) == 0 && 7488 ds->nfsdev_nmp != NULL) 7489 break; 7490 } 7491 NFSDDSUNLOCK(); 7492 if (ds == NULL) 7493 return (NFSERR_NOENT); 7494 7495 /* If the correct nfsdev_XXXXaddrlen is > 0, we have the device info. */ 7496 *devaddrlen = 0; 7497 if (layouttype == NFSLAYOUT_NFSV4_1_FILES) { 7498 *devaddrlen = ds->nfsdev_fileaddrlen; 7499 *devaddr = ds->nfsdev_fileaddr; 7500 } else if (layouttype == NFSLAYOUT_FLEXFILE) { 7501 *devaddrlen = ds->nfsdev_flexaddrlen; 7502 *devaddr = ds->nfsdev_flexaddr; 7503 } 7504 if (*devaddrlen == 0) 7505 return (NFSERR_UNKNLAYOUTTYPE); 7506 7507 /* 7508 * The XDR overhead is 3 unsigned values: layout_type, 7509 * length_of_address and notify bitmap. 7510 * If the notify array is changed to not all zeros, the 7511 * count of unsigned values must be increased. 7512 */ 7513 if (*maxcnt > 0 && *maxcnt < NFSM_RNDUP(*devaddrlen) + 7514 3 * NFSX_UNSIGNED) { 7515 *maxcnt = NFSM_RNDUP(*devaddrlen) + 3 * NFSX_UNSIGNED; 7516 return (NFSERR_TOOSMALL); 7517 } 7518 return (0); 7519 } 7520 7521 /* 7522 * Free a list of layout state structures. 7523 */ 7524 static void 7525 nfsrv_freelayoutlist(nfsquad_t clientid) 7526 { 7527 struct nfslayouthash *lhyp; 7528 struct nfslayout *lyp, *nlyp; 7529 int i; 7530 7531 for (i = 0; i < nfsrv_layouthashsize; i++) { 7532 lhyp = &nfslayouthash[i]; 7533 NFSLOCKLAYOUT(lhyp); 7534 TAILQ_FOREACH_SAFE(lyp, &lhyp->list, lay_list, nlyp) { 7535 if (lyp->lay_clientid.qval == clientid.qval) 7536 nfsrv_freelayout(&lhyp->list, lyp); 7537 } 7538 NFSUNLOCKLAYOUT(lhyp); 7539 } 7540 } 7541 7542 /* 7543 * Free up a layout. 7544 */ 7545 static void 7546 nfsrv_freelayout(struct nfslayouthead *lhp, struct nfslayout *lyp) 7547 { 7548 7549 NFSD_DEBUG(4, "Freelayout=%p\n", lyp); 7550 atomic_add_int(&nfsrv_layoutcnt, -1); 7551 NFSD_VNET(nfsstatsv1_p)->srvlayouts--; 7552 TAILQ_REMOVE(lhp, lyp, lay_list); 7553 free(lyp, M_NFSDSTATE); 7554 } 7555 7556 /* 7557 * Free up a device id. 7558 */ 7559 void 7560 nfsrv_freeonedevid(struct nfsdevice *ds) 7561 { 7562 int i; 7563 7564 atomic_add_int(&nfsrv_devidcnt, -1); 7565 vrele(ds->nfsdev_dvp); 7566 for (i = 0; i < nfsrv_dsdirsize; i++) 7567 if (ds->nfsdev_dsdir[i] != NULL) 7568 vrele(ds->nfsdev_dsdir[i]); 7569 free(ds->nfsdev_fileaddr, M_NFSDSTATE); 7570 free(ds->nfsdev_flexaddr, M_NFSDSTATE); 7571 free(ds->nfsdev_host, M_NFSDSTATE); 7572 free(ds, M_NFSDSTATE); 7573 } 7574 7575 /* 7576 * Free up a device id and its mirrors. 7577 */ 7578 static void 7579 nfsrv_freedevid(struct nfsdevice *ds) 7580 { 7581 7582 TAILQ_REMOVE(&nfsrv_devidhead, ds, nfsdev_list); 7583 nfsrv_freeonedevid(ds); 7584 } 7585 7586 /* 7587 * Free all layouts and device ids. 7588 * Done when the nfsd threads are shut down since there may be a new 7589 * modified device id list created when the nfsd is restarted. 7590 */ 7591 void 7592 nfsrv_freealllayoutsanddevids(void) 7593 { 7594 struct nfsdontlist *mrp, *nmrp; 7595 struct nfslayout *lyp, *nlyp; 7596 7597 /* Get rid of the deviceid structures. */ 7598 nfsrv_freealldevids(); 7599 TAILQ_INIT(&nfsrv_devidhead); 7600 nfsrv_devidcnt = 0; 7601 7602 /* Get rid of all layouts. */ 7603 nfsrv_freealllayouts(); 7604 7605 /* Get rid of any nfsdontlist entries. */ 7606 LIST_FOREACH_SAFE(mrp, &nfsrv_dontlisthead, nfsmr_list, nmrp) 7607 free(mrp, M_NFSDSTATE); 7608 LIST_INIT(&nfsrv_dontlisthead); 7609 nfsrv_dontlistlen = 0; 7610 7611 /* Free layouts in the recall list. */ 7612 TAILQ_FOREACH_SAFE(lyp, &nfsrv_recalllisthead, lay_list, nlyp) 7613 nfsrv_freelayout(&nfsrv_recalllisthead, lyp); 7614 TAILQ_INIT(&nfsrv_recalllisthead); 7615 } 7616 7617 /* 7618 * Free layouts that match the arguments. 7619 */ 7620 static void 7621 nfsrv_freelayouts(nfsquad_t *clid, fsid_t *fs, int laytype, int iomode) 7622 { 7623 struct nfslayouthash *lhyp; 7624 struct nfslayout *lyp, *nlyp; 7625 int i; 7626 7627 for (i = 0; i < nfsrv_layouthashsize; i++) { 7628 lhyp = &nfslayouthash[i]; 7629 NFSLOCKLAYOUT(lhyp); 7630 TAILQ_FOREACH_SAFE(lyp, &lhyp->list, lay_list, nlyp) { 7631 if (clid->qval != lyp->lay_clientid.qval) 7632 continue; 7633 if (fs != NULL && fsidcmp(fs, &lyp->lay_fsid) != 0) 7634 continue; 7635 if (laytype != lyp->lay_type) 7636 continue; 7637 if ((iomode & NFSLAYOUTIOMODE_READ) != 0) 7638 lyp->lay_flags &= ~NFSLAY_READ; 7639 if ((iomode & NFSLAYOUTIOMODE_RW) != 0) 7640 lyp->lay_flags &= ~NFSLAY_RW; 7641 if ((lyp->lay_flags & (NFSLAY_READ | NFSLAY_RW)) == 0) 7642 nfsrv_freelayout(&lhyp->list, lyp); 7643 } 7644 NFSUNLOCKLAYOUT(lhyp); 7645 } 7646 } 7647 7648 /* 7649 * Free all layouts for the argument file. 7650 */ 7651 void 7652 nfsrv_freefilelayouts(fhandle_t *fhp) 7653 { 7654 struct nfslayouthash *lhyp; 7655 struct nfslayout *lyp, *nlyp; 7656 7657 lhyp = NFSLAYOUTHASH(fhp); 7658 NFSLOCKLAYOUT(lhyp); 7659 TAILQ_FOREACH_SAFE(lyp, &lhyp->list, lay_list, nlyp) { 7660 if (NFSBCMP(&lyp->lay_fh, fhp, sizeof(*fhp)) == 0) 7661 nfsrv_freelayout(&lhyp->list, lyp); 7662 } 7663 NFSUNLOCKLAYOUT(lhyp); 7664 } 7665 7666 /* 7667 * Free all layouts. 7668 */ 7669 static void 7670 nfsrv_freealllayouts(void) 7671 { 7672 struct nfslayouthash *lhyp; 7673 struct nfslayout *lyp, *nlyp; 7674 int i; 7675 7676 for (i = 0; i < nfsrv_layouthashsize; i++) { 7677 lhyp = &nfslayouthash[i]; 7678 NFSLOCKLAYOUT(lhyp); 7679 TAILQ_FOREACH_SAFE(lyp, &lhyp->list, lay_list, nlyp) 7680 nfsrv_freelayout(&lhyp->list, lyp); 7681 NFSUNLOCKLAYOUT(lhyp); 7682 } 7683 } 7684 7685 /* 7686 * Look up the mount path for the DS server. 7687 */ 7688 static int 7689 nfsrv_setdsserver(char *dspathp, char *mdspathp, NFSPROC_T *p, 7690 struct nfsdevice **dsp) 7691 { 7692 struct nameidata nd; 7693 struct nfsdevice *ds; 7694 struct mount *mp; 7695 int error, i; 7696 char *dsdirpath; 7697 size_t dsdirsize; 7698 7699 NFSD_DEBUG(4, "setdssrv path=%s\n", dspathp); 7700 *dsp = NULL; 7701 if (jailed(p->td_ucred)) { 7702 printf("A pNFS nfsd cannot run in a jail\n"); 7703 return (EPERM); 7704 } 7705 NDINIT(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF, UIO_SYSSPACE, 7706 dspathp); 7707 error = namei(&nd); 7708 NFSD_DEBUG(4, "lookup=%d\n", error); 7709 if (error != 0) 7710 return (error); 7711 if (nd.ni_vp->v_type != VDIR) { 7712 vput(nd.ni_vp); 7713 NFSD_DEBUG(4, "dspath not dir\n"); 7714 return (ENOTDIR); 7715 } 7716 if (strcmp(nd.ni_vp->v_mount->mnt_vfc->vfc_name, "nfs") != 0) { 7717 vput(nd.ni_vp); 7718 NFSD_DEBUG(4, "dspath not an NFS mount\n"); 7719 return (ENXIO); 7720 } 7721 7722 /* 7723 * Allocate a DS server structure with the NFS mounted directory 7724 * vnode reference counted, so that a non-forced dismount will 7725 * fail with EBUSY. 7726 * This structure is always linked into the list, even if an error 7727 * is being returned. The caller will free the entire list upon 7728 * an error return. 7729 */ 7730 *dsp = ds = malloc(sizeof(*ds) + nfsrv_dsdirsize * sizeof(vnode_t), 7731 M_NFSDSTATE, M_WAITOK | M_ZERO); 7732 ds->nfsdev_dvp = nd.ni_vp; 7733 ds->nfsdev_nmp = VFSTONFS(nd.ni_vp->v_mount); 7734 NFSVOPUNLOCK(nd.ni_vp); 7735 7736 dsdirsize = strlen(dspathp) + 16; 7737 dsdirpath = malloc(dsdirsize, M_TEMP, M_WAITOK); 7738 /* Now, create the DS directory structures. */ 7739 for (i = 0; i < nfsrv_dsdirsize; i++) { 7740 snprintf(dsdirpath, dsdirsize, "%s/ds%d", dspathp, i); 7741 NDINIT(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF, 7742 UIO_SYSSPACE, dsdirpath); 7743 error = namei(&nd); 7744 NFSD_DEBUG(4, "dsdirpath=%s lookup=%d\n", dsdirpath, error); 7745 if (error != 0) 7746 break; 7747 if (nd.ni_vp->v_type != VDIR) { 7748 vput(nd.ni_vp); 7749 error = ENOTDIR; 7750 NFSD_DEBUG(4, "dsdirpath not a VDIR\n"); 7751 break; 7752 } 7753 if (strcmp(nd.ni_vp->v_mount->mnt_vfc->vfc_name, "nfs") != 0) { 7754 vput(nd.ni_vp); 7755 error = ENXIO; 7756 NFSD_DEBUG(4, "dsdirpath not an NFS mount\n"); 7757 break; 7758 } 7759 ds->nfsdev_dsdir[i] = nd.ni_vp; 7760 NFSVOPUNLOCK(nd.ni_vp); 7761 } 7762 free(dsdirpath, M_TEMP); 7763 7764 if (strlen(mdspathp) > 0) { 7765 /* 7766 * This DS stores file for a specific MDS exported file 7767 * system. 7768 */ 7769 NDINIT(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF, 7770 UIO_SYSSPACE, mdspathp); 7771 error = namei(&nd); 7772 NFSD_DEBUG(4, "mds lookup=%d\n", error); 7773 if (error != 0) 7774 goto out; 7775 if (nd.ni_vp->v_type != VDIR) { 7776 vput(nd.ni_vp); 7777 error = ENOTDIR; 7778 NFSD_DEBUG(4, "mdspath not dir\n"); 7779 goto out; 7780 } 7781 mp = nd.ni_vp->v_mount; 7782 if ((mp->mnt_flag & MNT_EXPORTED) == 0) { 7783 vput(nd.ni_vp); 7784 error = ENXIO; 7785 NFSD_DEBUG(4, "mdspath not an exported fs\n"); 7786 goto out; 7787 } 7788 ds->nfsdev_mdsfsid = mp->mnt_stat.f_fsid; 7789 ds->nfsdev_mdsisset = 1; 7790 vput(nd.ni_vp); 7791 } 7792 7793 out: 7794 TAILQ_INSERT_TAIL(&nfsrv_devidhead, ds, nfsdev_list); 7795 atomic_add_int(&nfsrv_devidcnt, 1); 7796 return (error); 7797 } 7798 7799 /* 7800 * Look up the mount path for the DS server and delete it. 7801 */ 7802 int 7803 nfsrv_deldsserver(int op, char *dspathp, NFSPROC_T *p) 7804 { 7805 struct mount *mp; 7806 struct nfsmount *nmp; 7807 struct nfsdevice *ds; 7808 int error; 7809 7810 NFSD_DEBUG(4, "deldssrv path=%s\n", dspathp); 7811 /* 7812 * Search for the path in the mount list. Avoid looking the path 7813 * up, since this mount point may be hung, with associated locked 7814 * vnodes, etc. 7815 * Set NFSMNTP_CANCELRPCS so that any forced dismount will be blocked 7816 * until this completes. 7817 * As noted in the man page, this should be done before any forced 7818 * dismount on the mount point, but at least the handshake on 7819 * NFSMNTP_CANCELRPCS should make it safe. 7820 */ 7821 error = 0; 7822 ds = NULL; 7823 nmp = NULL; 7824 mtx_lock(&mountlist_mtx); 7825 TAILQ_FOREACH(mp, &mountlist, mnt_list) { 7826 if (strcmp(mp->mnt_stat.f_mntonname, dspathp) == 0 && 7827 strcmp(mp->mnt_stat.f_fstypename, "nfs") == 0 && 7828 mp->mnt_data != NULL) { 7829 nmp = VFSTONFS(mp); 7830 NFSLOCKMNT(nmp); 7831 if ((nmp->nm_privflag & (NFSMNTP_FORCEDISM | 7832 NFSMNTP_CANCELRPCS)) == 0) { 7833 nmp->nm_privflag |= NFSMNTP_CANCELRPCS; 7834 NFSUNLOCKMNT(nmp); 7835 } else { 7836 NFSUNLOCKMNT(nmp); 7837 nmp = NULL; 7838 } 7839 break; 7840 } 7841 } 7842 mtx_unlock(&mountlist_mtx); 7843 7844 if (nmp != NULL) { 7845 ds = nfsrv_deldsnmp(op, nmp, p); 7846 NFSD_DEBUG(4, "deldsnmp=%p\n", ds); 7847 if (ds != NULL) { 7848 nfsrv_killrpcs(nmp); 7849 NFSD_DEBUG(4, "aft killrpcs\n"); 7850 } else 7851 error = ENXIO; 7852 NFSLOCKMNT(nmp); 7853 nmp->nm_privflag &= ~NFSMNTP_CANCELRPCS; 7854 wakeup(nmp); 7855 NFSUNLOCKMNT(nmp); 7856 } else 7857 error = EINVAL; 7858 return (error); 7859 } 7860 7861 /* 7862 * Search for and remove a DS entry which matches the "nmp" argument. 7863 * The nfsdevice structure pointer is returned so that the caller can 7864 * free it via nfsrv_freeonedevid(). 7865 * For the forced case, do not try to do LayoutRecalls, since the server 7866 * must be shut down now anyhow. 7867 */ 7868 struct nfsdevice * 7869 nfsrv_deldsnmp(int op, struct nfsmount *nmp, NFSPROC_T *p) 7870 { 7871 struct nfsdevice *fndds; 7872 7873 NFSD_DEBUG(4, "deldsdvp\n"); 7874 NFSDDSLOCK(); 7875 if (op == PNFSDOP_FORCEDELDS) 7876 fndds = nfsv4_findmirror(nmp); 7877 else 7878 fndds = nfsrv_findmirroredds(nmp); 7879 if (fndds != NULL) 7880 nfsrv_deleteds(fndds); 7881 NFSDDSUNLOCK(); 7882 if (fndds != NULL) { 7883 if (op != PNFSDOP_FORCEDELDS) 7884 nfsrv_flexmirrordel(fndds->nfsdev_deviceid, p); 7885 printf("pNFS server: mirror %s failed\n", fndds->nfsdev_host); 7886 } 7887 return (fndds); 7888 } 7889 7890 /* 7891 * Similar to nfsrv_deldsnmp(), except that the DS is indicated by deviceid. 7892 * This function also calls nfsrv_killrpcs() to unblock RPCs on the mount 7893 * point. 7894 * Also, returns an error instead of the nfsdevice found. 7895 */ 7896 int 7897 nfsrv_delds(char *devid, NFSPROC_T *p) 7898 { 7899 struct nfsdevice *ds, *fndds; 7900 struct nfsmount *nmp; 7901 int fndmirror; 7902 7903 NFSD_DEBUG(4, "delds\n"); 7904 /* 7905 * Search the DS server list for a match with devid. 7906 * Remove the DS entry if found and there is a mirror. 7907 */ 7908 fndds = NULL; 7909 nmp = NULL; 7910 fndmirror = 0; 7911 NFSDDSLOCK(); 7912 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 7913 if (NFSBCMP(ds->nfsdev_deviceid, devid, NFSX_V4DEVICEID) == 0 && 7914 ds->nfsdev_nmp != NULL) { 7915 NFSD_DEBUG(4, "fnd main ds\n"); 7916 fndds = ds; 7917 break; 7918 } 7919 } 7920 if (fndds == NULL) { 7921 NFSDDSUNLOCK(); 7922 return (ENXIO); 7923 } 7924 if (fndds->nfsdev_mdsisset == 0 && nfsrv_faildscnt > 0) 7925 fndmirror = 1; 7926 else if (fndds->nfsdev_mdsisset != 0) { 7927 /* For the fsid is set case, search for a mirror. */ 7928 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 7929 if (ds != fndds && ds->nfsdev_nmp != NULL && 7930 ds->nfsdev_mdsisset != 0 && 7931 fsidcmp(&ds->nfsdev_mdsfsid, 7932 &fndds->nfsdev_mdsfsid) == 0) { 7933 fndmirror = 1; 7934 break; 7935 } 7936 } 7937 } 7938 if (fndmirror != 0) { 7939 nmp = fndds->nfsdev_nmp; 7940 NFSLOCKMNT(nmp); 7941 if ((nmp->nm_privflag & (NFSMNTP_FORCEDISM | 7942 NFSMNTP_CANCELRPCS)) == 0) { 7943 nmp->nm_privflag |= NFSMNTP_CANCELRPCS; 7944 NFSUNLOCKMNT(nmp); 7945 nfsrv_deleteds(fndds); 7946 } else { 7947 NFSUNLOCKMNT(nmp); 7948 nmp = NULL; 7949 } 7950 } 7951 NFSDDSUNLOCK(); 7952 if (nmp != NULL) { 7953 nfsrv_flexmirrordel(fndds->nfsdev_deviceid, p); 7954 printf("pNFS server: mirror %s failed\n", fndds->nfsdev_host); 7955 nfsrv_killrpcs(nmp); 7956 NFSLOCKMNT(nmp); 7957 nmp->nm_privflag &= ~NFSMNTP_CANCELRPCS; 7958 wakeup(nmp); 7959 NFSUNLOCKMNT(nmp); 7960 return (0); 7961 } 7962 return (ENXIO); 7963 } 7964 7965 /* 7966 * Mark a DS as disabled by setting nfsdev_nmp = NULL. 7967 */ 7968 static void 7969 nfsrv_deleteds(struct nfsdevice *fndds) 7970 { 7971 7972 NFSD_DEBUG(4, "deleteds: deleting a mirror\n"); 7973 fndds->nfsdev_nmp = NULL; 7974 if (fndds->nfsdev_mdsisset == 0) 7975 nfsrv_faildscnt--; 7976 } 7977 7978 /* 7979 * Fill in the addr structures for the File and Flex File layouts. 7980 */ 7981 static void 7982 nfsrv_allocdevid(struct nfsdevice *ds, char *addr, char *dnshost) 7983 { 7984 uint32_t *tl; 7985 char *netprot; 7986 int addrlen; 7987 static uint64_t new_devid = 0; 7988 7989 if (strchr(addr, ':') != NULL) 7990 netprot = "tcp6"; 7991 else 7992 netprot = "tcp"; 7993 7994 /* Fill in the device id. */ 7995 NFSBCOPY(&nfsdev_time, ds->nfsdev_deviceid, sizeof(nfsdev_time)); 7996 new_devid++; 7997 NFSBCOPY(&new_devid, &ds->nfsdev_deviceid[sizeof(nfsdev_time)], 7998 sizeof(new_devid)); 7999 8000 /* 8001 * Fill in the file addr (actually the nfsv4_file_layout_ds_addr4 8002 * as defined in RFC5661) in XDR. 8003 */ 8004 addrlen = NFSM_RNDUP(strlen(addr)) + NFSM_RNDUP(strlen(netprot)) + 8005 6 * NFSX_UNSIGNED; 8006 NFSD_DEBUG(4, "hn=%s addr=%s netprot=%s\n", dnshost, addr, netprot); 8007 ds->nfsdev_fileaddrlen = addrlen; 8008 tl = malloc(addrlen, M_NFSDSTATE, M_WAITOK | M_ZERO); 8009 ds->nfsdev_fileaddr = (char *)tl; 8010 *tl++ = txdr_unsigned(1); /* One stripe with index 0. */ 8011 *tl++ = 0; 8012 *tl++ = txdr_unsigned(1); /* One multipath list */ 8013 *tl++ = txdr_unsigned(1); /* with one entry in it. */ 8014 /* The netaddr for this one entry. */ 8015 *tl++ = txdr_unsigned(strlen(netprot)); 8016 NFSBCOPY(netprot, tl, strlen(netprot)); 8017 tl += (NFSM_RNDUP(strlen(netprot)) / NFSX_UNSIGNED); 8018 *tl++ = txdr_unsigned(strlen(addr)); 8019 NFSBCOPY(addr, tl, strlen(addr)); 8020 8021 /* 8022 * Fill in the flex file addr (actually the ff_device_addr4 8023 * as defined for Flexible File Layout) in XDR. 8024 */ 8025 addrlen = NFSM_RNDUP(strlen(addr)) + NFSM_RNDUP(strlen(netprot)) + 8026 14 * NFSX_UNSIGNED; 8027 ds->nfsdev_flexaddrlen = addrlen; 8028 tl = malloc(addrlen, M_NFSDSTATE, M_WAITOK | M_ZERO); 8029 ds->nfsdev_flexaddr = (char *)tl; 8030 *tl++ = txdr_unsigned(1); /* One multipath entry. */ 8031 /* The netaddr for this one entry. */ 8032 *tl++ = txdr_unsigned(strlen(netprot)); 8033 NFSBCOPY(netprot, tl, strlen(netprot)); 8034 tl += (NFSM_RNDUP(strlen(netprot)) / NFSX_UNSIGNED); 8035 *tl++ = txdr_unsigned(strlen(addr)); 8036 NFSBCOPY(addr, tl, strlen(addr)); 8037 tl += (NFSM_RNDUP(strlen(addr)) / NFSX_UNSIGNED); 8038 *tl++ = txdr_unsigned(2); /* Two NFS Versions. */ 8039 *tl++ = txdr_unsigned(NFS_VER4); /* NFSv4. */ 8040 *tl++ = txdr_unsigned(NFSV42_MINORVERSION); /* Minor version 2. */ 8041 *tl++ = txdr_unsigned(nfs_srvmaxio); /* DS max rsize. */ 8042 *tl++ = txdr_unsigned(nfs_srvmaxio); /* DS max wsize. */ 8043 *tl++ = newnfs_true; /* Tightly coupled. */ 8044 *tl++ = txdr_unsigned(NFS_VER4); /* NFSv4. */ 8045 *tl++ = txdr_unsigned(NFSV41_MINORVERSION); /* Minor version 1. */ 8046 *tl++ = txdr_unsigned(nfs_srvmaxio); /* DS max rsize. */ 8047 *tl++ = txdr_unsigned(nfs_srvmaxio); /* DS max wsize. */ 8048 *tl = newnfs_true; /* Tightly coupled. */ 8049 8050 ds->nfsdev_hostnamelen = strlen(dnshost); 8051 ds->nfsdev_host = malloc(ds->nfsdev_hostnamelen + 1, M_NFSDSTATE, 8052 M_WAITOK); 8053 NFSBCOPY(dnshost, ds->nfsdev_host, ds->nfsdev_hostnamelen + 1); 8054 } 8055 8056 /* 8057 * Create the device id list. 8058 * Return 0 if the nfsd threads are to run and ENXIO if the "-p" argument 8059 * is misconfigured. 8060 */ 8061 int 8062 nfsrv_createdevids(struct nfsd_nfsd_args *args, NFSPROC_T *p) 8063 { 8064 struct nfsdevice *ds; 8065 char *addrp, *dnshostp, *dspathp, *mdspathp; 8066 int error, i; 8067 8068 addrp = args->addr; 8069 dnshostp = args->dnshost; 8070 dspathp = args->dspath; 8071 mdspathp = args->mdspath; 8072 nfsrv_maxpnfsmirror = args->mirrorcnt; 8073 if (addrp == NULL || dnshostp == NULL || dspathp == NULL || 8074 mdspathp == NULL) 8075 return (0); 8076 8077 /* 8078 * Loop around for each nul-terminated string in args->addr, 8079 * args->dnshost, args->dnspath and args->mdspath. 8080 */ 8081 while (addrp < (args->addr + args->addrlen) && 8082 dnshostp < (args->dnshost + args->dnshostlen) && 8083 dspathp < (args->dspath + args->dspathlen) && 8084 mdspathp < (args->mdspath + args->mdspathlen)) { 8085 error = nfsrv_setdsserver(dspathp, mdspathp, p, &ds); 8086 if (error != 0) { 8087 /* Free all DS servers. */ 8088 nfsrv_freealldevids(); 8089 nfsrv_devidcnt = 0; 8090 return (ENXIO); 8091 } 8092 nfsrv_allocdevid(ds, addrp, dnshostp); 8093 addrp += (strlen(addrp) + 1); 8094 dnshostp += (strlen(dnshostp) + 1); 8095 dspathp += (strlen(dspathp) + 1); 8096 mdspathp += (strlen(mdspathp) + 1); 8097 } 8098 if (nfsrv_devidcnt < nfsrv_maxpnfsmirror) { 8099 /* Free all DS servers. */ 8100 nfsrv_freealldevids(); 8101 nfsrv_devidcnt = 0; 8102 nfsrv_maxpnfsmirror = 1; 8103 return (ENXIO); 8104 } 8105 /* We can fail at most one less DS than the mirror level. */ 8106 nfsrv_faildscnt = nfsrv_maxpnfsmirror - 1; 8107 8108 /* 8109 * Allocate the nfslayout hash table now, since this is a pNFS server. 8110 * Make it 1% of the high water mark and at least 100. 8111 */ 8112 if (nfslayouthash == NULL) { 8113 nfsrv_layouthashsize = nfsrv_layouthighwater / 100; 8114 if (nfsrv_layouthashsize < 100) 8115 nfsrv_layouthashsize = 100; 8116 nfslayouthash = mallocarray(nfsrv_layouthashsize, 8117 sizeof(struct nfslayouthash), M_NFSDSESSION, M_WAITOK | 8118 M_ZERO); 8119 for (i = 0; i < nfsrv_layouthashsize; i++) { 8120 mtx_init(&nfslayouthash[i].mtx, "nfslm", NULL, MTX_DEF); 8121 TAILQ_INIT(&nfslayouthash[i].list); 8122 } 8123 } 8124 return (0); 8125 } 8126 8127 /* 8128 * Free all device ids. 8129 */ 8130 static void 8131 nfsrv_freealldevids(void) 8132 { 8133 struct nfsdevice *ds, *nds; 8134 8135 TAILQ_FOREACH_SAFE(ds, &nfsrv_devidhead, nfsdev_list, nds) 8136 nfsrv_freedevid(ds); 8137 } 8138 8139 /* 8140 * Check to see if there is a Read/Write Layout plus either: 8141 * - A Write Delegation 8142 * or 8143 * - An Open with Write_access. 8144 * Return 1 if this is the case and 0 otherwise. 8145 * This function is used by nfsrv_proxyds() to decide if doing a Proxy 8146 * Getattr RPC to the Data Server (DS) is necessary. 8147 */ 8148 #define NFSCLIDVECSIZE 6 8149 int 8150 nfsrv_checkdsattr(vnode_t vp, NFSPROC_T *p) 8151 { 8152 fhandle_t fh, *tfhp; 8153 struct nfsstate *stp; 8154 struct nfslayout *lyp; 8155 struct nfslayouthash *lhyp; 8156 struct nfslockhashhead *hp; 8157 struct nfslockfile *lfp; 8158 nfsquad_t clid[NFSCLIDVECSIZE]; 8159 int clidcnt, ret; 8160 8161 ret = nfsvno_getfh(vp, &fh, p); 8162 if (ret != 0) 8163 return (0); 8164 8165 /* First check for a Read/Write Layout. */ 8166 clidcnt = 0; 8167 lhyp = NFSLAYOUTHASH(&fh); 8168 NFSLOCKLAYOUT(lhyp); 8169 TAILQ_FOREACH(lyp, &lhyp->list, lay_list) { 8170 if (NFSBCMP(&lyp->lay_fh, &fh, sizeof(fh)) == 0 && 8171 ((lyp->lay_flags & NFSLAY_RW) != 0 || 8172 ((lyp->lay_flags & NFSLAY_READ) != 0 && 8173 nfsrv_pnfsatime != 0))) { 8174 if (clidcnt < NFSCLIDVECSIZE) 8175 clid[clidcnt].qval = lyp->lay_clientid.qval; 8176 clidcnt++; 8177 } 8178 } 8179 NFSUNLOCKLAYOUT(lhyp); 8180 if (clidcnt == 0) { 8181 /* None found, so return 0. */ 8182 return (0); 8183 } 8184 8185 /* Get the nfslockfile for this fh. */ 8186 NFSLOCKSTATE(); 8187 hp = NFSLOCKHASH(&fh); 8188 LIST_FOREACH(lfp, hp, lf_hash) { 8189 tfhp = &lfp->lf_fh; 8190 if (NFSVNO_CMPFH(&fh, tfhp)) 8191 break; 8192 } 8193 if (lfp == NULL) { 8194 /* None found, so return 0. */ 8195 NFSUNLOCKSTATE(); 8196 return (0); 8197 } 8198 8199 /* Now, look for a Write delegation for this clientid. */ 8200 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) { 8201 if ((stp->ls_flags & NFSLCK_DELEGWRITE) != 0 && 8202 nfsrv_fndclid(clid, stp->ls_clp->lc_clientid, clidcnt) != 0) 8203 break; 8204 } 8205 if (stp != NULL) { 8206 /* Found one, so return 1. */ 8207 NFSUNLOCKSTATE(); 8208 return (1); 8209 } 8210 8211 /* No Write delegation, so look for an Open with Write_access. */ 8212 LIST_FOREACH(stp, &lfp->lf_open, ls_file) { 8213 KASSERT((stp->ls_flags & NFSLCK_OPEN) != 0, 8214 ("nfsrv_checkdsattr: Non-open in Open list\n")); 8215 if ((stp->ls_flags & NFSLCK_WRITEACCESS) != 0 && 8216 nfsrv_fndclid(clid, stp->ls_clp->lc_clientid, clidcnt) != 0) 8217 break; 8218 } 8219 NFSUNLOCKSTATE(); 8220 if (stp != NULL) 8221 return (1); 8222 return (0); 8223 } 8224 8225 /* 8226 * Look for a matching clientid in the vector. Return 1 if one might match. 8227 */ 8228 static int 8229 nfsrv_fndclid(nfsquad_t *clidvec, nfsquad_t clid, int clidcnt) 8230 { 8231 int i; 8232 8233 /* If too many for the vector, return 1 since there might be a match. */ 8234 if (clidcnt > NFSCLIDVECSIZE) 8235 return (1); 8236 8237 for (i = 0; i < clidcnt; i++) 8238 if (clidvec[i].qval == clid.qval) 8239 return (1); 8240 return (0); 8241 } 8242 8243 /* 8244 * Check the don't list for "vp" and see if issuing an rw layout is allowed. 8245 * Return 1 if issuing an rw layout isn't allowed, 0 otherwise. 8246 */ 8247 static int 8248 nfsrv_dontlayout(fhandle_t *fhp) 8249 { 8250 struct nfsdontlist *mrp; 8251 int ret; 8252 8253 if (nfsrv_dontlistlen == 0) 8254 return (0); 8255 ret = 0; 8256 NFSDDONTLISTLOCK(); 8257 LIST_FOREACH(mrp, &nfsrv_dontlisthead, nfsmr_list) { 8258 if (NFSBCMP(fhp, &mrp->nfsmr_fh, sizeof(*fhp)) == 0 && 8259 (mrp->nfsmr_flags & NFSMR_DONTLAYOUT) != 0) { 8260 ret = 1; 8261 break; 8262 } 8263 } 8264 NFSDDONTLISTUNLOCK(); 8265 return (ret); 8266 } 8267 8268 #define PNFSDS_COPYSIZ 65536 8269 /* 8270 * Create a new file on a DS and copy the contents of an extant DS file to it. 8271 * This can be used for recovery of a DS file onto a recovered DS. 8272 * The steps are: 8273 * - When called, the MDS file's vnode is locked, blocking LayoutGet operations. 8274 * - Disable issuing of read/write layouts for the file via the nfsdontlist, 8275 * so that they will be disabled after the MDS file's vnode is unlocked. 8276 * - Set up the nfsrv_recalllist so that recall of read/write layouts can 8277 * be done. 8278 * - Unlock the MDS file's vnode, so that the client(s) can perform proxied 8279 * writes, LayoutCommits and LayoutReturns for the file when completing the 8280 * LayoutReturn requested by the LayoutRecall callback. 8281 * - Issue a LayoutRecall callback for all read/write layouts and wait for 8282 * them to be returned. (If the LayoutRecall callback replies 8283 * NFSERR_NOMATCHLAYOUT, they are gone and no LayoutReturn is needed.) 8284 * - Exclusively lock the MDS file's vnode. This ensures that no proxied 8285 * writes are in progress or can occur during the DS file copy. 8286 * It also blocks Setattr operations. 8287 * - Create the file on the recovered mirror. 8288 * - Copy the file from the operational DS. 8289 * - Copy any ACL from the MDS file to the new DS file. 8290 * - Set the modify time of the new DS file to that of the MDS file. 8291 * - Update the extended attribute for the MDS file. 8292 * - Enable issuing of rw layouts by deleting the nfsdontlist entry. 8293 * - The caller will unlock the MDS file's vnode allowing operations 8294 * to continue normally, since it is now on the mirror again. 8295 */ 8296 int 8297 nfsrv_copymr(vnode_t vp, vnode_t fvp, vnode_t dvp, struct nfsdevice *ds, 8298 struct pnfsdsfile *pf, struct pnfsdsfile *wpf, int mirrorcnt, 8299 struct ucred *cred, NFSPROC_T *p) 8300 { 8301 struct nfsdontlist *mrp, *nmrp; 8302 struct nfslayouthash *lhyp; 8303 struct nfslayout *lyp, *nlyp; 8304 struct nfslayouthead thl; 8305 struct mount *mp, *tvmp; 8306 struct acl *aclp; 8307 struct vattr va; 8308 struct timespec mtime; 8309 fhandle_t fh; 8310 vnode_t tvp; 8311 off_t rdpos, wrpos; 8312 ssize_t aresid; 8313 char *dat; 8314 int didprintf, ret, retacl, xfer; 8315 8316 ASSERT_VOP_LOCKED(fvp, "nfsrv_copymr fvp"); 8317 ASSERT_VOP_LOCKED(vp, "nfsrv_copymr vp"); 8318 /* 8319 * Allocate a nfsdontlist entry and set the NFSMR_DONTLAYOUT flag 8320 * so that no more RW layouts will get issued. 8321 */ 8322 ret = nfsvno_getfh(vp, &fh, p); 8323 if (ret != 0) { 8324 NFSD_DEBUG(4, "nfsrv_copymr: getfh=%d\n", ret); 8325 return (ret); 8326 } 8327 nmrp = malloc(sizeof(*nmrp), M_NFSDSTATE, M_WAITOK); 8328 nmrp->nfsmr_flags = NFSMR_DONTLAYOUT; 8329 NFSBCOPY(&fh, &nmrp->nfsmr_fh, sizeof(fh)); 8330 NFSDDONTLISTLOCK(); 8331 LIST_FOREACH(mrp, &nfsrv_dontlisthead, nfsmr_list) { 8332 if (NFSBCMP(&fh, &mrp->nfsmr_fh, sizeof(fh)) == 0) 8333 break; 8334 } 8335 if (mrp == NULL) { 8336 LIST_INSERT_HEAD(&nfsrv_dontlisthead, nmrp, nfsmr_list); 8337 mrp = nmrp; 8338 nmrp = NULL; 8339 nfsrv_dontlistlen++; 8340 NFSD_DEBUG(4, "nfsrv_copymr: in dontlist\n"); 8341 } else { 8342 NFSDDONTLISTUNLOCK(); 8343 free(nmrp, M_NFSDSTATE); 8344 NFSD_DEBUG(4, "nfsrv_copymr: dup dontlist\n"); 8345 return (ENXIO); 8346 } 8347 NFSDDONTLISTUNLOCK(); 8348 8349 /* 8350 * Search for all RW layouts for this file. Move them to the 8351 * recall list, so they can be recalled and their return noted. 8352 */ 8353 lhyp = NFSLAYOUTHASH(&fh); 8354 NFSDRECALLLOCK(); 8355 NFSLOCKLAYOUT(lhyp); 8356 TAILQ_FOREACH_SAFE(lyp, &lhyp->list, lay_list, nlyp) { 8357 if (NFSBCMP(&lyp->lay_fh, &fh, sizeof(fh)) == 0 && 8358 (lyp->lay_flags & NFSLAY_RW) != 0) { 8359 TAILQ_REMOVE(&lhyp->list, lyp, lay_list); 8360 TAILQ_INSERT_HEAD(&nfsrv_recalllisthead, lyp, lay_list); 8361 lyp->lay_trycnt = 0; 8362 } 8363 } 8364 NFSUNLOCKLAYOUT(lhyp); 8365 NFSDRECALLUNLOCK(); 8366 8367 ret = 0; 8368 mp = tvmp = NULL; 8369 didprintf = 0; 8370 TAILQ_INIT(&thl); 8371 /* Unlock the MDS vp, so that a LayoutReturn can be done on it. */ 8372 NFSVOPUNLOCK(vp); 8373 /* Now, do a recall for all layouts not yet recalled. */ 8374 tryagain: 8375 NFSDRECALLLOCK(); 8376 TAILQ_FOREACH(lyp, &nfsrv_recalllisthead, lay_list) { 8377 if (NFSBCMP(&lyp->lay_fh, &fh, sizeof(fh)) == 0 && 8378 (lyp->lay_flags & NFSLAY_RECALL) == 0) { 8379 lyp->lay_flags |= NFSLAY_RECALL; 8380 /* 8381 * The layout stateid.seqid needs to be incremented 8382 * before doing a LAYOUT_RECALL callback. 8383 */ 8384 if (++lyp->lay_stateid.seqid == 0) 8385 lyp->lay_stateid.seqid = 1; 8386 NFSDRECALLUNLOCK(); 8387 nfsrv_recalllayout(lyp->lay_clientid, &lyp->lay_stateid, 8388 &lyp->lay_fh, lyp, 0, lyp->lay_type, p); 8389 NFSD_DEBUG(4, "nfsrv_copymr: recalled layout\n"); 8390 goto tryagain; 8391 } 8392 } 8393 8394 /* Now wait for them to be returned. */ 8395 tryagain2: 8396 TAILQ_FOREACH(lyp, &nfsrv_recalllisthead, lay_list) { 8397 if (NFSBCMP(&lyp->lay_fh, &fh, sizeof(fh)) == 0) { 8398 if ((lyp->lay_flags & NFSLAY_RETURNED) != 0) { 8399 TAILQ_REMOVE(&nfsrv_recalllisthead, lyp, 8400 lay_list); 8401 TAILQ_INSERT_HEAD(&thl, lyp, lay_list); 8402 NFSD_DEBUG(4, 8403 "nfsrv_copymr: layout returned\n"); 8404 } else { 8405 lyp->lay_trycnt++; 8406 ret = mtx_sleep(lyp, NFSDRECALLMUTEXPTR, 8407 PVFS | PCATCH, "nfsmrl", hz); 8408 NFSD_DEBUG(4, "nfsrv_copymr: aft sleep=%d\n", 8409 ret); 8410 if (ret == EINTR || ret == ERESTART) 8411 break; 8412 if ((lyp->lay_flags & NFSLAY_RETURNED) == 0) { 8413 /* 8414 * Give up after 60sec and return 8415 * ENXIO, failing the copymr. 8416 * This layout will remain on the 8417 * recalllist. It can only be cleared 8418 * by restarting the nfsd. 8419 * This seems the safe way to handle 8420 * it, since it cannot be safely copied 8421 * with an outstanding RW layout. 8422 */ 8423 if (lyp->lay_trycnt >= 60) { 8424 ret = ENXIO; 8425 break; 8426 } 8427 if (didprintf == 0) { 8428 printf("nfsrv_copymr: layout " 8429 "not returned\n"); 8430 didprintf = 1; 8431 } 8432 } 8433 } 8434 goto tryagain2; 8435 } 8436 } 8437 NFSDRECALLUNLOCK(); 8438 /* We can now get rid of the layouts that have been returned. */ 8439 TAILQ_FOREACH_SAFE(lyp, &thl, lay_list, nlyp) 8440 nfsrv_freelayout(&thl, lyp); 8441 8442 /* 8443 * Do the vn_start_write() calls here, before the MDS vnode is 8444 * locked and the tvp is created (locked) in the NFS file system 8445 * that dvp is in. 8446 * For tvmp, this probably isn't necessary, since it will be an 8447 * NFS mount and they are not suspendable at this time. 8448 */ 8449 if (ret == 0) 8450 ret = vn_start_write(vp, &mp, V_WAIT | V_PCATCH); 8451 if (ret == 0) { 8452 tvmp = dvp->v_mount; 8453 ret = vn_start_write(NULL, &tvmp, V_WAIT | V_PCATCH); 8454 } 8455 8456 /* 8457 * LK_EXCLUSIVE lock the MDS vnode, so that any 8458 * proxied writes through the MDS will be blocked until we have 8459 * completed the copy and update of the extended attributes. 8460 * This will also ensure that any attributes and ACL will not be 8461 * changed until the copy is complete. 8462 */ 8463 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 8464 if (ret == 0 && VN_IS_DOOMED(vp)) { 8465 NFSD_DEBUG(4, "nfsrv_copymr: lk_exclusive doomed\n"); 8466 ret = ESTALE; 8467 } 8468 8469 /* Create the data file on the recovered DS. */ 8470 if (ret == 0) 8471 ret = nfsrv_createdsfile(vp, &fh, pf, dvp, ds, cred, p, &tvp); 8472 8473 /* Copy the DS file, if created successfully. */ 8474 if (ret == 0) { 8475 /* 8476 * Get any NFSv4 ACL on the MDS file, so that it can be set 8477 * on the new DS file. 8478 */ 8479 aclp = acl_alloc(M_WAITOK | M_ZERO); 8480 retacl = VOP_GETACL(vp, ACL_TYPE_NFS4, aclp, cred, p); 8481 if (retacl != 0 && retacl != ENOATTR) 8482 NFSD_DEBUG(1, "nfsrv_copymr: vop_getacl=%d\n", retacl); 8483 dat = malloc(PNFSDS_COPYSIZ, M_TEMP, M_WAITOK); 8484 /* Malloc a block of 0s used to check for holes. */ 8485 if (nfsrv_zeropnfsdat == NULL) 8486 nfsrv_zeropnfsdat = malloc(PNFSDS_COPYSIZ, M_TEMP, 8487 M_WAITOK | M_ZERO); 8488 rdpos = wrpos = 0; 8489 ret = VOP_GETATTR(fvp, &va, cred); 8490 aresid = 0; 8491 while (ret == 0 && aresid == 0) { 8492 ret = vn_rdwr(UIO_READ, fvp, dat, PNFSDS_COPYSIZ, 8493 rdpos, UIO_SYSSPACE, IO_NODELOCKED, cred, NULL, 8494 &aresid, p); 8495 xfer = PNFSDS_COPYSIZ - aresid; 8496 if (ret == 0 && xfer > 0) { 8497 rdpos += xfer; 8498 /* 8499 * Skip the write for holes, except for the 8500 * last block. 8501 */ 8502 if (xfer < PNFSDS_COPYSIZ || rdpos == 8503 va.va_size || NFSBCMP(dat, 8504 nfsrv_zeropnfsdat, PNFSDS_COPYSIZ) != 0) 8505 ret = vn_rdwr(UIO_WRITE, tvp, dat, xfer, 8506 wrpos, UIO_SYSSPACE, IO_NODELOCKED, 8507 cred, NULL, NULL, p); 8508 if (ret == 0) 8509 wrpos += xfer; 8510 } 8511 } 8512 8513 /* If there is an ACL and the copy succeeded, set the ACL. */ 8514 if (ret == 0 && retacl == 0) { 8515 ret = VOP_SETACL(tvp, ACL_TYPE_NFS4, aclp, cred, p); 8516 /* 8517 * Don't consider these as errors, since VOP_GETACL() 8518 * can return an ACL when they are not actually 8519 * supported. For example, for UFS, VOP_GETACL() 8520 * will return a trivial ACL based on the uid/gid/mode 8521 * when there is no ACL on the file. 8522 * This case should be recognized as a trivial ACL 8523 * by UFS's VOP_SETACL() and succeed, but... 8524 */ 8525 if (ret == ENOATTR || ret == EOPNOTSUPP || ret == EPERM) 8526 ret = 0; 8527 } 8528 8529 if (ret == 0) 8530 ret = VOP_FSYNC(tvp, MNT_WAIT, p); 8531 8532 /* Set the DS data file's modify time that of the MDS file. */ 8533 if (ret == 0) 8534 ret = VOP_GETATTR(vp, &va, cred); 8535 if (ret == 0) { 8536 mtime = va.va_mtime; 8537 VATTR_NULL(&va); 8538 va.va_mtime = mtime; 8539 ret = VOP_SETATTR(tvp, &va, cred); 8540 } 8541 8542 vput(tvp); 8543 acl_free(aclp); 8544 free(dat, M_TEMP); 8545 } 8546 if (tvmp != NULL) 8547 vn_finished_write(tvmp); 8548 8549 /* Update the extended attributes for the newly created DS file. */ 8550 if (ret == 0) 8551 ret = vn_extattr_set(vp, IO_NODELOCKED, 8552 EXTATTR_NAMESPACE_SYSTEM, "pnfsd.dsfile", 8553 sizeof(*wpf) * mirrorcnt, (char *)wpf, p); 8554 if (mp != NULL) 8555 vn_finished_write(mp); 8556 8557 /* Get rid of the dontlist entry, so that Layouts can be issued. */ 8558 NFSDDONTLISTLOCK(); 8559 LIST_REMOVE(mrp, nfsmr_list); 8560 NFSDDONTLISTUNLOCK(); 8561 free(mrp, M_NFSDSTATE); 8562 return (ret); 8563 } 8564 8565 /* 8566 * Create a data storage file on the recovered DS. 8567 */ 8568 static int 8569 nfsrv_createdsfile(vnode_t vp, fhandle_t *fhp, struct pnfsdsfile *pf, 8570 vnode_t dvp, struct nfsdevice *ds, struct ucred *cred, NFSPROC_T *p, 8571 vnode_t *tvpp) 8572 { 8573 struct vattr va, nva; 8574 int error; 8575 8576 /* Make data file name based on FH. */ 8577 error = VOP_GETATTR(vp, &va, cred); 8578 if (error == 0) { 8579 /* Set the attributes for "vp" to Setattr the DS vp. */ 8580 VATTR_NULL(&nva); 8581 nva.va_uid = va.va_uid; 8582 nva.va_gid = va.va_gid; 8583 nva.va_mode = va.va_mode; 8584 nva.va_size = 0; 8585 VATTR_NULL(&va); 8586 va.va_type = VREG; 8587 va.va_mode = nva.va_mode; 8588 NFSD_DEBUG(4, "nfsrv_dscreatefile: dvp=%p pf=%p\n", dvp, pf); 8589 error = nfsrv_dscreate(dvp, &va, &nva, fhp, pf, NULL, 8590 pf->dsf_filename, cred, p, tvpp); 8591 } 8592 return (error); 8593 } 8594 8595 /* 8596 * Look up the MDS file shared locked, and then get the extended attribute 8597 * to find the extant DS file to be copied to the new mirror. 8598 * If successful, *vpp is set to the MDS file's vp and *nvpp is 8599 * set to a DS data file for the MDS file, both exclusively locked. 8600 * The "buf" argument has the pnfsdsfile structure from the MDS file 8601 * in it and buflen is set to its length. 8602 */ 8603 int 8604 nfsrv_mdscopymr(char *mdspathp, char *dspathp, char *curdspathp, char *buf, 8605 int *buflenp, char *fname, NFSPROC_T *p, struct vnode **vpp, 8606 struct vnode **nvpp, struct pnfsdsfile **pfp, struct nfsdevice **dsp, 8607 struct nfsdevice **fdsp) 8608 { 8609 struct nameidata nd; 8610 struct vnode *vp, *curvp; 8611 struct pnfsdsfile *pf; 8612 struct nfsmount *nmp, *curnmp; 8613 int dsdir, error, mirrorcnt, ippos; 8614 8615 vp = NULL; 8616 curvp = NULL; 8617 curnmp = NULL; 8618 *dsp = NULL; 8619 *fdsp = NULL; 8620 if (dspathp == NULL && curdspathp != NULL) 8621 return (EPERM); 8622 8623 /* 8624 * Look up the MDS file shared locked. The lock will be upgraded 8625 * to an exclusive lock after any rw layouts have been returned. 8626 */ 8627 NFSD_DEBUG(4, "mdsopen path=%s\n", mdspathp); 8628 NDINIT(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF, UIO_SYSSPACE, 8629 mdspathp); 8630 error = namei(&nd); 8631 NFSD_DEBUG(4, "lookup=%d\n", error); 8632 if (error != 0) 8633 return (error); 8634 if (nd.ni_vp->v_type != VREG) { 8635 vput(nd.ni_vp); 8636 NFSD_DEBUG(4, "mdspath not reg\n"); 8637 return (EISDIR); 8638 } 8639 vp = nd.ni_vp; 8640 8641 if (curdspathp != NULL) { 8642 /* 8643 * Look up the current DS path and find the nfsdev structure for 8644 * it. 8645 */ 8646 NFSD_DEBUG(4, "curmdsdev path=%s\n", curdspathp); 8647 NDINIT(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF, 8648 UIO_SYSSPACE, curdspathp); 8649 error = namei(&nd); 8650 NFSD_DEBUG(4, "ds lookup=%d\n", error); 8651 if (error != 0) { 8652 vput(vp); 8653 return (error); 8654 } 8655 if (nd.ni_vp->v_type != VDIR) { 8656 vput(nd.ni_vp); 8657 vput(vp); 8658 NFSD_DEBUG(4, "curdspath not dir\n"); 8659 return (ENOTDIR); 8660 } 8661 if (strcmp(nd.ni_vp->v_mount->mnt_vfc->vfc_name, "nfs") != 0) { 8662 vput(nd.ni_vp); 8663 vput(vp); 8664 NFSD_DEBUG(4, "curdspath not an NFS mount\n"); 8665 return (ENXIO); 8666 } 8667 curnmp = VFSTONFS(nd.ni_vp->v_mount); 8668 8669 /* Search the nfsdev list for a match. */ 8670 NFSDDSLOCK(); 8671 *fdsp = nfsv4_findmirror(curnmp); 8672 NFSDDSUNLOCK(); 8673 if (*fdsp == NULL) 8674 curnmp = NULL; 8675 if (curnmp == NULL) { 8676 vput(nd.ni_vp); 8677 vput(vp); 8678 NFSD_DEBUG(4, "mdscopymr: no current ds\n"); 8679 return (ENXIO); 8680 } 8681 curvp = nd.ni_vp; 8682 } 8683 8684 if (dspathp != NULL) { 8685 /* Look up the nfsdev path and find the nfsdev structure. */ 8686 NFSD_DEBUG(4, "mdsdev path=%s\n", dspathp); 8687 NDINIT(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF, 8688 UIO_SYSSPACE, dspathp); 8689 error = namei(&nd); 8690 NFSD_DEBUG(4, "ds lookup=%d\n", error); 8691 if (error != 0) { 8692 vput(vp); 8693 if (curvp != NULL) 8694 vput(curvp); 8695 return (error); 8696 } 8697 if (nd.ni_vp->v_type != VDIR || nd.ni_vp == curvp) { 8698 vput(nd.ni_vp); 8699 vput(vp); 8700 if (curvp != NULL) 8701 vput(curvp); 8702 NFSD_DEBUG(4, "dspath not dir\n"); 8703 if (nd.ni_vp == curvp) 8704 return (EPERM); 8705 return (ENOTDIR); 8706 } 8707 if (strcmp(nd.ni_vp->v_mount->mnt_vfc->vfc_name, "nfs") != 0) { 8708 vput(nd.ni_vp); 8709 vput(vp); 8710 if (curvp != NULL) 8711 vput(curvp); 8712 NFSD_DEBUG(4, "dspath not an NFS mount\n"); 8713 return (ENXIO); 8714 } 8715 nmp = VFSTONFS(nd.ni_vp->v_mount); 8716 8717 /* 8718 * Search the nfsdevice list for a match. If curnmp == NULL, 8719 * this is a recovery and there must be a mirror. 8720 */ 8721 NFSDDSLOCK(); 8722 if (curnmp == NULL) 8723 *dsp = nfsrv_findmirroredds(nmp); 8724 else 8725 *dsp = nfsv4_findmirror(nmp); 8726 NFSDDSUNLOCK(); 8727 if (*dsp == NULL) { 8728 vput(nd.ni_vp); 8729 vput(vp); 8730 if (curvp != NULL) 8731 vput(curvp); 8732 NFSD_DEBUG(4, "mdscopymr: no ds\n"); 8733 return (ENXIO); 8734 } 8735 } else { 8736 nd.ni_vp = NULL; 8737 nmp = NULL; 8738 } 8739 8740 /* 8741 * Get a vp for an available DS data file using the extended 8742 * attribute on the MDS file. 8743 * If there is a valid entry for the new DS in the extended attribute 8744 * on the MDS file (as checked via the nmp argument), 8745 * nfsrv_dsgetsockmnt() returns EEXIST, so no copying will occur. 8746 */ 8747 error = nfsrv_dsgetsockmnt(vp, 0, buf, buflenp, &mirrorcnt, p, 8748 NULL, NULL, NULL, fname, nvpp, &nmp, curnmp, &ippos, &dsdir); 8749 if (curvp != NULL) 8750 vput(curvp); 8751 if (nd.ni_vp == NULL) { 8752 if (error == 0 && nmp != NULL) { 8753 /* Search the nfsdev list for a match. */ 8754 NFSDDSLOCK(); 8755 *dsp = nfsrv_findmirroredds(nmp); 8756 NFSDDSUNLOCK(); 8757 } 8758 if (error == 0 && (nmp == NULL || *dsp == NULL)) { 8759 if (nvpp != NULL && *nvpp != NULL) { 8760 vput(*nvpp); 8761 *nvpp = NULL; 8762 } 8763 error = ENXIO; 8764 } 8765 } else 8766 vput(nd.ni_vp); 8767 8768 /* 8769 * When dspathp != NULL and curdspathp == NULL, this is a recovery 8770 * and is only allowed if there is a 0.0.0.0 IP address entry. 8771 * When curdspathp != NULL, the ippos will be set to that entry. 8772 */ 8773 if (error == 0 && dspathp != NULL && ippos == -1) { 8774 if (nvpp != NULL && *nvpp != NULL) { 8775 vput(*nvpp); 8776 *nvpp = NULL; 8777 } 8778 error = ENXIO; 8779 } 8780 if (error == 0) { 8781 *vpp = vp; 8782 8783 pf = (struct pnfsdsfile *)buf; 8784 if (ippos == -1) { 8785 /* If no zeroip pnfsdsfile, add one. */ 8786 ippos = *buflenp / sizeof(*pf); 8787 *buflenp += sizeof(*pf); 8788 pf += ippos; 8789 pf->dsf_dir = dsdir; 8790 strlcpy(pf->dsf_filename, fname, 8791 sizeof(pf->dsf_filename)); 8792 } else 8793 pf += ippos; 8794 *pfp = pf; 8795 } else 8796 vput(vp); 8797 return (error); 8798 } 8799 8800 /* 8801 * Search for a matching pnfsd mirror device structure, base on the nmp arg. 8802 * Return one if found, NULL otherwise. 8803 */ 8804 static struct nfsdevice * 8805 nfsrv_findmirroredds(struct nfsmount *nmp) 8806 { 8807 struct nfsdevice *ds, *fndds; 8808 int fndmirror; 8809 8810 mtx_assert(NFSDDSMUTEXPTR, MA_OWNED); 8811 /* 8812 * Search the DS server list for a match with nmp. 8813 * Remove the DS entry if found and there is a mirror. 8814 */ 8815 fndds = NULL; 8816 fndmirror = 0; 8817 if (nfsrv_devidcnt == 0) 8818 return (fndds); 8819 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 8820 if (ds->nfsdev_nmp == nmp) { 8821 NFSD_DEBUG(4, "nfsrv_findmirroredds: fnd main ds\n"); 8822 fndds = ds; 8823 break; 8824 } 8825 } 8826 if (fndds == NULL) 8827 return (fndds); 8828 if (fndds->nfsdev_mdsisset == 0 && nfsrv_faildscnt > 0) 8829 fndmirror = 1; 8830 else if (fndds->nfsdev_mdsisset != 0) { 8831 /* For the fsid is set case, search for a mirror. */ 8832 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 8833 if (ds != fndds && ds->nfsdev_nmp != NULL && 8834 ds->nfsdev_mdsisset != 0 && 8835 fsidcmp(&ds->nfsdev_mdsfsid, 8836 &fndds->nfsdev_mdsfsid) == 0) { 8837 fndmirror = 1; 8838 break; 8839 } 8840 } 8841 } 8842 if (fndmirror == 0) { 8843 NFSD_DEBUG(4, "nfsrv_findmirroredds: no mirror for DS\n"); 8844 return (NULL); 8845 } 8846 return (fndds); 8847 } 8848 8849 /* 8850 * Mark the appropriate devid and all associated layout as "out of space". 8851 */ 8852 void 8853 nfsrv_marknospc(char *devid, bool setit) 8854 { 8855 struct nfsdevice *ds; 8856 struct nfslayout *lyp; 8857 struct nfslayouthash *lhyp; 8858 int i; 8859 8860 NFSDDSLOCK(); 8861 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 8862 if (NFSBCMP(ds->nfsdev_deviceid, devid, NFSX_V4DEVICEID) == 0) { 8863 NFSD_DEBUG(1, "nfsrv_marknospc: devid %d\n", setit); 8864 ds->nfsdev_nospc = setit; 8865 } 8866 } 8867 NFSDDSUNLOCK(); 8868 8869 for (i = 0; i < nfsrv_layouthashsize; i++) { 8870 lhyp = &nfslayouthash[i]; 8871 NFSLOCKLAYOUT(lhyp); 8872 TAILQ_FOREACH(lyp, &lhyp->list, lay_list) { 8873 if (NFSBCMP(lyp->lay_deviceid, devid, 8874 NFSX_V4DEVICEID) == 0) { 8875 NFSD_DEBUG(1, "nfsrv_marknospc: layout %d\n", 8876 setit); 8877 if (setit) 8878 lyp->lay_flags |= NFSLAY_NOSPC; 8879 else 8880 lyp->lay_flags &= ~NFSLAY_NOSPC; 8881 } 8882 } 8883 NFSUNLOCKLAYOUT(lhyp); 8884 } 8885 } 8886