1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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 #include "opt_inet.h" 32 #include "opt_inet6.h" 33 #include <sys/extattr.h> 34 #include <fs/nfs/nfsport.h> 35 36 int nfsrv_issuedelegs = 0; 37 int nfsrv_dolocallocks = 0; 38 struct nfsv4lock nfsv4rootfs_lock; 39 time_t nfsdev_time = 0; 40 int nfsrv_layouthashsize; 41 volatile int nfsrv_layoutcnt = 0; 42 43 NFSD_VNET_DEFINE(struct nfsrv_stablefirst, nfsrv_stablefirst); 44 45 NFSD_VNET_DECLARE(int, nfsrv_numnfsd); 46 NFSD_VNET_DECLARE(struct nfsstatsv1 *, nfsstatsv1_p); 47 48 extern uint32_t nfs_srvmaxio; 49 extern int nfsrv_lease; 50 extern struct timeval nfsboottime; 51 extern u_int32_t newnfs_true, newnfs_false; 52 extern struct mtx nfsrv_dslock_mtx; 53 extern struct mtx nfsrv_recalllock_mtx; 54 extern struct mtx nfsrv_dontlistlock_mtx; 55 extern int nfsd_debuglevel; 56 extern u_int nfsrv_dsdirsize; 57 extern struct nfsdevicehead nfsrv_devidhead; 58 extern int nfsrv_doflexfile; 59 extern int nfsrv_maxpnfsmirror; 60 NFSV4ROOTLOCKMUTEX; 61 NFSSTATESPINLOCK; 62 extern struct nfsdontlisthead nfsrv_dontlisthead; 63 extern volatile int nfsrv_devidcnt; 64 extern struct nfslayouthead nfsrv_recalllisthead; 65 extern char *nfsrv_zeropnfsdat; 66 67 SYSCTL_DECL(_vfs_nfsd); 68 int nfsrv_statehashsize = NFSSTATEHASHSIZE; 69 SYSCTL_INT(_vfs_nfsd, OID_AUTO, statehashsize, CTLFLAG_RDTUN, 70 &nfsrv_statehashsize, 0, 71 "Size of state hash table set via loader.conf"); 72 73 int nfsrv_clienthashsize = NFSCLIENTHASHSIZE; 74 SYSCTL_INT(_vfs_nfsd, OID_AUTO, clienthashsize, CTLFLAG_RDTUN, 75 &nfsrv_clienthashsize, 0, 76 "Size of client hash table set via loader.conf"); 77 78 int nfsrv_lockhashsize = NFSLOCKHASHSIZE; 79 SYSCTL_INT(_vfs_nfsd, OID_AUTO, fhhashsize, CTLFLAG_RDTUN, 80 &nfsrv_lockhashsize, 0, 81 "Size of file handle hash table set via loader.conf"); 82 83 int nfsrv_sessionhashsize = NFSSESSIONHASHSIZE; 84 SYSCTL_INT(_vfs_nfsd, OID_AUTO, sessionhashsize, CTLFLAG_RDTUN, 85 &nfsrv_sessionhashsize, 0, 86 "Size of session hash table set via loader.conf"); 87 88 int nfsrv_layouthighwater = NFSLAYOUTHIGHWATER; 89 SYSCTL_INT(_vfs_nfsd, OID_AUTO, layouthighwater, CTLFLAG_RDTUN, 90 &nfsrv_layouthighwater, 0, 91 "High water mark for number of layouts set via loader.conf"); 92 93 static int nfsrv_v4statelimit = NFSRV_V4STATELIMIT; 94 SYSCTL_INT(_vfs_nfsd, OID_AUTO, v4statelimit, CTLFLAG_RWTUN, 95 &nfsrv_v4statelimit, 0, 96 "High water limit for NFSv4 opens+locks+delegations"); 97 98 static int nfsrv_writedelegifpos = 0; 99 SYSCTL_INT(_vfs_nfsd, OID_AUTO, writedelegifpos, CTLFLAG_RW, 100 &nfsrv_writedelegifpos, 0, 101 "Issue a write delegation for read opens if possible"); 102 103 static int nfsrv_allowreadforwriteopen = 1; 104 SYSCTL_INT(_vfs_nfsd, OID_AUTO, allowreadforwriteopen, CTLFLAG_RW, 105 &nfsrv_allowreadforwriteopen, 0, 106 "Allow Reads to be done with Write Access StateIDs"); 107 108 int nfsrv_pnfsatime = 0; 109 SYSCTL_INT(_vfs_nfsd, OID_AUTO, pnfsstrictatime, CTLFLAG_RW, 110 &nfsrv_pnfsatime, 0, 111 "For pNFS service, do Getattr ops to keep atime up-to-date"); 112 113 int nfsrv_flexlinuxhack = 0; 114 SYSCTL_INT(_vfs_nfsd, OID_AUTO, flexlinuxhack, CTLFLAG_RW, 115 &nfsrv_flexlinuxhack, 0, 116 "For Linux clients, hack around Flex File Layout bug"); 117 118 /* 119 * Hash lists for nfs V4. 120 */ 121 NFSD_VNET_DEFINE(struct nfsclienthashhead *, nfsclienthash); 122 NFSD_VNET_DEFINE(struct nfslockhashhead *, nfslockhash); 123 NFSD_VNET_DEFINE(struct nfssessionhash *, nfssessionhash); 124 125 struct nfslayouthash *nfslayouthash; 126 volatile int nfsrv_dontlistlen = 0; 127 128 static u_int32_t nfsrv_openpluslock = 0, nfsrv_delegatecnt = 0; 129 static int nfsrv_returnoldstateid = 0, nfsrv_clients = 0; 130 static int nfsrv_clienthighwater = NFSRV_CLIENTHIGHWATER; 131 static int nfsrv_nogsscallback = 0; 132 static volatile int nfsrv_writedelegcnt = 0; 133 static int nfsrv_faildscnt; 134 135 NFSD_VNET_DEFINE_STATIC(time_t, nfsrvboottime); 136 137 /* local functions */ 138 static void nfsrv_dumpaclient(struct nfsclient *clp, 139 struct nfsd_dumpclients *dumpp); 140 static void nfsrv_freeopenowner(struct nfsstate *stp, int cansleep, 141 NFSPROC_T *p); 142 static int nfsrv_freeopen(struct nfsstate *stp, vnode_t vp, int cansleep, 143 NFSPROC_T *p); 144 static void nfsrv_freelockowner(struct nfsstate *stp, vnode_t vp, int cansleep, 145 NFSPROC_T *p); 146 static void nfsrv_freeallnfslocks(struct nfsstate *stp, vnode_t vp, 147 int cansleep, NFSPROC_T *p); 148 static void nfsrv_freenfslock(struct nfslock *lop); 149 static void nfsrv_freenfslockfile(struct nfslockfile *lfp); 150 static void nfsrv_freedeleg(struct nfsstate *); 151 static int nfsrv_getstate(struct nfsclient *clp, nfsv4stateid_t *stateidp, 152 u_int32_t flags, struct nfsstate **stpp); 153 static void nfsrv_getowner(struct nfsstatehead *hp, struct nfsstate *new_stp, 154 struct nfsstate **stpp); 155 static int nfsrv_getlockfh(vnode_t vp, u_short flags, 156 struct nfslockfile *new_lfp, fhandle_t *nfhp, NFSPROC_T *p); 157 static int nfsrv_getlockfile(u_short flags, struct nfslockfile **new_lfpp, 158 struct nfslockfile **lfpp, fhandle_t *nfhp, int lockit); 159 static void nfsrv_insertlock(struct nfslock *new_lop, 160 struct nfslock *insert_lop, struct nfsstate *stp, struct nfslockfile *lfp); 161 static void nfsrv_updatelock(struct nfsstate *stp, struct nfslock **new_lopp, 162 struct nfslock **other_lopp, struct nfslockfile *lfp); 163 static int nfsrv_getipnumber(u_char *cp); 164 static int nfsrv_checkrestart(nfsquad_t clientid, u_int32_t flags, 165 nfsv4stateid_t *stateidp, int specialid); 166 static int nfsrv_checkgrace(struct nfsrv_descript *nd, struct nfsclient *clp, 167 u_int32_t flags); 168 static int nfsrv_docallback(struct nfsclient *clp, int procnum, 169 nfsv4stateid_t *stateidp, int trunc, fhandle_t *fhp, 170 struct nfsvattr *nap, nfsattrbit_t *attrbitp, int laytype, NFSPROC_T *p); 171 static int nfsrv_cbcallargs(struct nfsrv_descript *nd, struct nfsclient *clp, 172 uint32_t callback, int op, const char *optag, struct nfsdsession **sepp, 173 int *slotposp); 174 static u_int32_t nfsrv_nextclientindex(void); 175 static u_int32_t nfsrv_nextstateindex(struct nfsclient *clp); 176 static void nfsrv_markstable(struct nfsclient *clp); 177 static void nfsrv_markreclaim(struct nfsclient *clp); 178 static int nfsrv_checkstable(struct nfsclient *clp); 179 static int nfsrv_clientconflict(struct nfsclient *clp, int *haslockp, struct 180 vnode *vp, NFSPROC_T *p); 181 static int nfsrv_delegconflict(struct nfsstate *stp, int *haslockp, 182 NFSPROC_T *p, vnode_t vp); 183 static int nfsrv_cleandeleg(vnode_t vp, struct nfslockfile *lfp, 184 struct nfsclient *clp, int *haslockp, NFSPROC_T *p); 185 static int nfsrv_notsamecredname(int op, struct nfsrv_descript *nd, 186 struct nfsclient *clp); 187 static time_t nfsrv_leaseexpiry(void); 188 static void nfsrv_delaydelegtimeout(struct nfsstate *stp); 189 static int nfsrv_checkseqid(struct nfsrv_descript *nd, u_int32_t seqid, 190 struct nfsstate *stp, struct nfsrvcache *op); 191 static int nfsrv_nootherstate(struct nfsstate *stp); 192 static int nfsrv_locallock(vnode_t vp, struct nfslockfile *lfp, int flags, 193 uint64_t first, uint64_t end, struct nfslockconflict *cfp, NFSPROC_T *p); 194 static void nfsrv_localunlock(vnode_t vp, struct nfslockfile *lfp, 195 uint64_t init_first, uint64_t init_end, NFSPROC_T *p); 196 static int nfsrv_dolocal(vnode_t vp, struct nfslockfile *lfp, int flags, 197 int oldflags, uint64_t first, uint64_t end, struct nfslockconflict *cfp, 198 NFSPROC_T *p); 199 static void nfsrv_locallock_rollback(vnode_t vp, struct nfslockfile *lfp, 200 NFSPROC_T *p); 201 static void nfsrv_locallock_commit(struct nfslockfile *lfp, int flags, 202 uint64_t first, uint64_t end); 203 static void nfsrv_locklf(struct nfslockfile *lfp); 204 static void nfsrv_unlocklf(struct nfslockfile *lfp); 205 static struct nfsdsession *nfsrv_findsession(uint8_t *sessionid); 206 static int nfsrv_freesession(struct nfsrv_descript *nd, struct nfsdsession *sep, 207 uint8_t *sessionid); 208 static int nfsv4_setcbsequence(struct nfsrv_descript *nd, struct nfsclient *clp, 209 int dont_replycache, struct nfsdsession **sepp, int *slotposp); 210 static int nfsv4_getcbsession(struct nfsclient *clp, struct nfsdsession **sepp); 211 static int nfsrv_addlayout(struct nfsrv_descript *nd, struct nfslayout **lypp, 212 nfsv4stateid_t *stateidp, char *layp, int *layoutlenp, NFSPROC_T *p); 213 static void nfsrv_freelayout(struct nfslayouthead *lhp, struct nfslayout *lyp); 214 static void nfsrv_freelayoutlist(nfsquad_t clientid); 215 static void nfsrv_freelayouts(nfsquad_t *clid, fsid_t *fs, int laytype, 216 int iomode); 217 static void nfsrv_freealllayouts(void); 218 static void nfsrv_freedevid(struct nfsdevice *ds); 219 static int nfsrv_setdsserver(char *dspathp, char *mdspathp, NFSPROC_T *p, 220 struct nfsdevice **dsp); 221 static void nfsrv_deleteds(struct nfsdevice *fndds); 222 static void nfsrv_allocdevid(struct nfsdevice *ds, char *addr, char *dnshost); 223 static void nfsrv_freealldevids(void); 224 static void nfsrv_flexlayouterr(struct nfsrv_descript *nd, uint32_t *layp, 225 int maxcnt, NFSPROC_T *p); 226 static int nfsrv_recalllayout(nfsquad_t clid, nfsv4stateid_t *stateidp, 227 fhandle_t *fhp, struct nfslayout *lyp, int changed, int laytype, 228 NFSPROC_T *p); 229 static int nfsrv_findlayout(nfsquad_t *clientidp, fhandle_t *fhp, int laytype, 230 NFSPROC_T *, struct nfslayout **lypp); 231 static int nfsrv_fndclid(nfsquad_t *clidvec, nfsquad_t clid, int clidcnt); 232 static struct nfslayout *nfsrv_filelayout(struct nfsrv_descript *nd, int iomode, 233 fhandle_t *fhp, fhandle_t *dsfhp, char *devid, fsid_t fs); 234 static struct nfslayout *nfsrv_flexlayout(struct nfsrv_descript *nd, int iomode, 235 int mirrorcnt, fhandle_t *fhp, fhandle_t *dsfhp, char *devid, fsid_t fs); 236 static int nfsrv_dontlayout(fhandle_t *fhp); 237 static int nfsrv_createdsfile(vnode_t vp, fhandle_t *fhp, struct pnfsdsfile *pf, 238 vnode_t dvp, struct nfsdevice *ds, struct ucred *cred, NFSPROC_T *p, 239 vnode_t *tvpp); 240 static struct nfsdevice *nfsrv_findmirroredds(struct nfsmount *nmp); 241 static int nfsrv_checkmachcred(int op, struct nfsrv_descript *nd, 242 struct nfsclient *clp); 243 static void nfsrv_issuedelegation(struct vnode *vp, struct nfsclient *clp, 244 struct nfsrv_descript *nd, int delegate, int writedeleg, int readonly, 245 u_quad_t filerev, uint64_t rdonly, struct nfsstate **new_delegp, 246 struct nfsstate *new_stp, struct nfslockfile *lfp, uint32_t *rflagsp, 247 nfsv4stateid_t *delegstateidp); 248 249 /* 250 * Scan the client list for a match and either return the current one, 251 * create a new entry or return an error. 252 * If returning a non-error, the clp structure must either be linked into 253 * the client list or free'd. 254 */ 255 int 256 nfsrv_setclient(struct nfsrv_descript *nd, struct nfsclient **new_clpp, 257 nfsquad_t *clientidp, nfsquad_t *confirmp, NFSPROC_T *p) 258 { 259 struct nfsclient *clp = NULL, *new_clp = *new_clpp; 260 int i, error = 0, ret; 261 struct nfsstate *stp, *tstp; 262 #ifdef INET 263 struct sockaddr_in *sin, *rin; 264 #endif 265 #ifdef INET6 266 struct sockaddr_in6 *sin6, *rin6; 267 #endif 268 struct nfsdsession *sep, *nsep; 269 int zapit = 0, gotit, hasstate = 0, igotlock; 270 static u_int64_t confirm_index = 0; 271 272 /* 273 * Check for state resource limit exceeded. 274 */ 275 if (nfsrv_openpluslock > nfsrv_v4statelimit) { 276 error = NFSERR_RESOURCE; 277 goto out; 278 } 279 280 if (nfsrv_issuedelegs == 0 || 281 ((nd->nd_flag & ND_GSS) != 0 && nfsrv_nogsscallback != 0)) 282 /* 283 * Don't do callbacks when delegations are disabled or 284 * for AUTH_GSS unless enabled via nfsrv_nogsscallback. 285 * If establishing a callback connection is attempted 286 * when a firewall is blocking the callback path, the 287 * server may wait too long for the connect attempt to 288 * succeed during the Open. Some clients, such as Linux, 289 * may timeout and give up on the Open before the server 290 * replies. Also, since AUTH_GSS callbacks are not 291 * yet interoperability tested, they might cause the 292 * server to crap out, if they get past the Init call to 293 * the client. 294 */ 295 new_clp->lc_program = 0; 296 297 /* Lock out other nfsd threads */ 298 NFSLOCKV4ROOTMUTEX(); 299 nfsv4_relref(&nfsv4rootfs_lock); 300 do { 301 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 302 NFSV4ROOTLOCKMUTEXPTR, NULL); 303 } while (!igotlock); 304 NFSUNLOCKV4ROOTMUTEX(); 305 306 /* 307 * Search for a match in the client list. 308 */ 309 gotit = i = 0; 310 while (i < nfsrv_clienthashsize && !gotit) { 311 LIST_FOREACH(clp, &NFSD_VNET(nfsclienthash)[i], lc_hash) { 312 if (new_clp->lc_idlen == clp->lc_idlen && 313 !NFSBCMP(new_clp->lc_id, clp->lc_id, clp->lc_idlen)) { 314 gotit = 1; 315 break; 316 } 317 } 318 if (gotit == 0) 319 i++; 320 } 321 if (!gotit || 322 (clp->lc_flags & (LCL_NEEDSCONFIRM | LCL_ADMINREVOKED))) { 323 if ((nd->nd_flag & ND_NFSV41) != 0 && confirmp->lval[1] != 0) { 324 /* 325 * For NFSv4.1, if confirmp->lval[1] is non-zero, the 326 * client is trying to update a confirmed clientid. 327 */ 328 NFSLOCKV4ROOTMUTEX(); 329 nfsv4_unlock(&nfsv4rootfs_lock, 1); 330 NFSUNLOCKV4ROOTMUTEX(); 331 confirmp->lval[1] = 0; 332 error = NFSERR_NOENT; 333 goto out; 334 } 335 /* 336 * Get rid of the old one. 337 */ 338 if (i != nfsrv_clienthashsize) { 339 LIST_REMOVE(clp, lc_hash); 340 nfsrv_cleanclient(clp, p); 341 nfsrv_freedeleglist(&clp->lc_deleg); 342 nfsrv_freedeleglist(&clp->lc_olddeleg); 343 zapit = 1; 344 } 345 /* 346 * Add it after assigning a client id to it. 347 */ 348 new_clp->lc_flags |= LCL_NEEDSCONFIRM; 349 if ((nd->nd_flag & ND_NFSV41) != 0) { 350 confirmp->lval[0] = ++confirm_index; 351 new_clp->lc_confirm.lval[0] = confirmp->lval[0] - 1; 352 } else 353 confirmp->qval = new_clp->lc_confirm.qval = 354 ++confirm_index; 355 clientidp->lval[0] = new_clp->lc_clientid.lval[0] = 356 NFSD_VNET(nfsrvboottime); 357 clientidp->lval[1] = new_clp->lc_clientid.lval[1] = 358 nfsrv_nextclientindex(); 359 new_clp->lc_stateindex = 0; 360 new_clp->lc_statemaxindex = 0; 361 new_clp->lc_prevsess = 0; 362 new_clp->lc_cbref = 0; 363 new_clp->lc_expiry = nfsrv_leaseexpiry(); 364 LIST_INIT(&new_clp->lc_open); 365 LIST_INIT(&new_clp->lc_deleg); 366 LIST_INIT(&new_clp->lc_olddeleg); 367 LIST_INIT(&new_clp->lc_session); 368 for (i = 0; i < nfsrv_statehashsize; i++) 369 LIST_INIT(&new_clp->lc_stateid[i]); 370 LIST_INSERT_HEAD(NFSCLIENTHASH(new_clp->lc_clientid), new_clp, 371 lc_hash); 372 NFSD_VNET(nfsstatsv1_p)->srvclients++; 373 nfsrv_openpluslock++; 374 nfsrv_clients++; 375 NFSLOCKV4ROOTMUTEX(); 376 nfsv4_unlock(&nfsv4rootfs_lock, 1); 377 NFSUNLOCKV4ROOTMUTEX(); 378 if (zapit) 379 nfsrv_zapclient(clp, p); 380 *new_clpp = NULL; 381 goto out; 382 } 383 384 /* 385 * Now, handle the cases where the id is already issued. 386 */ 387 if (nfsrv_notsamecredname(NFSV4OP_EXCHANGEID, nd, clp)) { 388 /* 389 * Check to see if there is expired state that should go away. 390 */ 391 if (clp->lc_expiry < NFSD_MONOSEC && 392 (!LIST_EMPTY(&clp->lc_open) || !LIST_EMPTY(&clp->lc_deleg))) { 393 nfsrv_cleanclient(clp, p); 394 nfsrv_freedeleglist(&clp->lc_deleg); 395 } 396 397 /* 398 * If there is outstanding state, then reply NFSERR_CLIDINUSE per 399 * RFC3530 Sec. 8.1.2 last para. 400 */ 401 if (!LIST_EMPTY(&clp->lc_deleg)) { 402 hasstate = 1; 403 } else if (LIST_EMPTY(&clp->lc_open)) { 404 hasstate = 0; 405 } else { 406 hasstate = 0; 407 /* Look for an Open on the OpenOwner */ 408 LIST_FOREACH(stp, &clp->lc_open, ls_list) { 409 if (!LIST_EMPTY(&stp->ls_open)) { 410 hasstate = 1; 411 break; 412 } 413 } 414 } 415 if (hasstate) { 416 /* 417 * If the uid doesn't match, return NFSERR_CLIDINUSE after 418 * filling out the correct ipaddr and portnum. 419 */ 420 switch (clp->lc_req.nr_nam->sa_family) { 421 #ifdef INET 422 case AF_INET: 423 sin = (struct sockaddr_in *)new_clp->lc_req.nr_nam; 424 rin = (struct sockaddr_in *)clp->lc_req.nr_nam; 425 sin->sin_addr.s_addr = rin->sin_addr.s_addr; 426 sin->sin_port = rin->sin_port; 427 break; 428 #endif 429 #ifdef INET6 430 case AF_INET6: 431 sin6 = (struct sockaddr_in6 *)new_clp->lc_req.nr_nam; 432 rin6 = (struct sockaddr_in6 *)clp->lc_req.nr_nam; 433 sin6->sin6_addr = rin6->sin6_addr; 434 sin6->sin6_port = rin6->sin6_port; 435 break; 436 #endif 437 } 438 NFSLOCKV4ROOTMUTEX(); 439 nfsv4_unlock(&nfsv4rootfs_lock, 1); 440 NFSUNLOCKV4ROOTMUTEX(); 441 error = NFSERR_CLIDINUSE; 442 goto out; 443 } 444 } 445 446 if (NFSBCMP(new_clp->lc_verf, clp->lc_verf, NFSX_VERF)) { 447 /* 448 * If the verifier has changed, the client has rebooted 449 * and a new client id is issued. The old state info 450 * can be thrown away once the SetClientID_Confirm or 451 * Create_Session that confirms the clientid occurs. 452 */ 453 LIST_REMOVE(clp, lc_hash); 454 455 /* Get rid of all sessions on this clientid. */ 456 LIST_FOREACH_SAFE(sep, &clp->lc_session, sess_list, nsep) { 457 ret = nfsrv_freesession(NULL, sep, NULL); 458 if (ret != 0) 459 printf("nfsrv_setclient: verifier changed free" 460 " session failed=%d\n", ret); 461 } 462 463 new_clp->lc_flags |= LCL_NEEDSCONFIRM; 464 if ((nd->nd_flag & ND_NFSV41) != 0) { 465 confirmp->lval[0] = ++confirm_index; 466 new_clp->lc_confirm.lval[0] = confirmp->lval[0] - 1; 467 } else 468 confirmp->qval = new_clp->lc_confirm.qval = 469 ++confirm_index; 470 clientidp->lval[0] = new_clp->lc_clientid.lval[0] = 471 NFSD_VNET(nfsrvboottime); 472 clientidp->lval[1] = new_clp->lc_clientid.lval[1] = 473 nfsrv_nextclientindex(); 474 new_clp->lc_stateindex = 0; 475 new_clp->lc_statemaxindex = 0; 476 new_clp->lc_prevsess = 0; 477 new_clp->lc_cbref = 0; 478 new_clp->lc_expiry = nfsrv_leaseexpiry(); 479 480 /* 481 * Save the state until confirmed. 482 */ 483 LIST_NEWHEAD(&new_clp->lc_open, &clp->lc_open, ls_list); 484 LIST_FOREACH(tstp, &new_clp->lc_open, ls_list) 485 tstp->ls_clp = new_clp; 486 LIST_NEWHEAD(&new_clp->lc_deleg, &clp->lc_deleg, ls_list); 487 LIST_FOREACH(tstp, &new_clp->lc_deleg, ls_list) 488 tstp->ls_clp = new_clp; 489 LIST_NEWHEAD(&new_clp->lc_olddeleg, &clp->lc_olddeleg, 490 ls_list); 491 LIST_FOREACH(tstp, &new_clp->lc_olddeleg, ls_list) 492 tstp->ls_clp = new_clp; 493 for (i = 0; i < nfsrv_statehashsize; i++) { 494 LIST_NEWHEAD(&new_clp->lc_stateid[i], 495 &clp->lc_stateid[i], ls_hash); 496 LIST_FOREACH(tstp, &new_clp->lc_stateid[i], ls_hash) 497 tstp->ls_clp = new_clp; 498 } 499 LIST_INIT(&new_clp->lc_session); 500 LIST_INSERT_HEAD(NFSCLIENTHASH(new_clp->lc_clientid), new_clp, 501 lc_hash); 502 NFSD_VNET(nfsstatsv1_p)->srvclients++; 503 nfsrv_openpluslock++; 504 nfsrv_clients++; 505 NFSLOCKV4ROOTMUTEX(); 506 nfsv4_unlock(&nfsv4rootfs_lock, 1); 507 NFSUNLOCKV4ROOTMUTEX(); 508 509 /* 510 * Must wait until any outstanding callback on the old clp 511 * completes. 512 */ 513 NFSLOCKSTATE(); 514 while (clp->lc_cbref) { 515 clp->lc_flags |= LCL_WAKEUPWANTED; 516 (void)mtx_sleep(clp, NFSSTATEMUTEXPTR, PZERO - 1, 517 "nfsd clp", 10 * hz); 518 } 519 NFSUNLOCKSTATE(); 520 nfsrv_zapclient(clp, p); 521 *new_clpp = NULL; 522 goto out; 523 } 524 525 /* For NFSv4.1, mark that we found a confirmed clientid. */ 526 if ((nd->nd_flag & ND_NFSV41) != 0) { 527 clientidp->lval[0] = clp->lc_clientid.lval[0]; 528 clientidp->lval[1] = clp->lc_clientid.lval[1]; 529 confirmp->lval[0] = 0; /* Ignored by client */ 530 confirmp->lval[1] = 1; 531 } else { 532 /* 533 * id and verifier match, so update the net address info 534 * and get rid of any existing callback authentication 535 * handle, so a new one will be acquired. 536 */ 537 LIST_REMOVE(clp, lc_hash); 538 new_clp->lc_flags |= (LCL_NEEDSCONFIRM | LCL_DONTCLEAN); 539 new_clp->lc_expiry = nfsrv_leaseexpiry(); 540 confirmp->qval = new_clp->lc_confirm.qval = ++confirm_index; 541 clientidp->lval[0] = new_clp->lc_clientid.lval[0] = 542 clp->lc_clientid.lval[0]; 543 clientidp->lval[1] = new_clp->lc_clientid.lval[1] = 544 clp->lc_clientid.lval[1]; 545 new_clp->lc_delegtime = clp->lc_delegtime; 546 new_clp->lc_stateindex = clp->lc_stateindex; 547 new_clp->lc_statemaxindex = clp->lc_statemaxindex; 548 new_clp->lc_cbref = 0; 549 LIST_NEWHEAD(&new_clp->lc_open, &clp->lc_open, ls_list); 550 LIST_FOREACH(tstp, &new_clp->lc_open, ls_list) 551 tstp->ls_clp = new_clp; 552 LIST_NEWHEAD(&new_clp->lc_deleg, &clp->lc_deleg, ls_list); 553 LIST_FOREACH(tstp, &new_clp->lc_deleg, ls_list) 554 tstp->ls_clp = new_clp; 555 LIST_NEWHEAD(&new_clp->lc_olddeleg, &clp->lc_olddeleg, ls_list); 556 LIST_FOREACH(tstp, &new_clp->lc_olddeleg, ls_list) 557 tstp->ls_clp = new_clp; 558 for (i = 0; i < nfsrv_statehashsize; i++) { 559 LIST_NEWHEAD(&new_clp->lc_stateid[i], 560 &clp->lc_stateid[i], ls_hash); 561 LIST_FOREACH(tstp, &new_clp->lc_stateid[i], ls_hash) 562 tstp->ls_clp = new_clp; 563 } 564 LIST_INIT(&new_clp->lc_session); 565 LIST_INSERT_HEAD(NFSCLIENTHASH(new_clp->lc_clientid), new_clp, 566 lc_hash); 567 NFSD_VNET(nfsstatsv1_p)->srvclients++; 568 nfsrv_openpluslock++; 569 nfsrv_clients++; 570 } 571 NFSLOCKV4ROOTMUTEX(); 572 nfsv4_unlock(&nfsv4rootfs_lock, 1); 573 NFSUNLOCKV4ROOTMUTEX(); 574 575 if ((nd->nd_flag & ND_NFSV41) == 0) { 576 /* 577 * Must wait until any outstanding callback on the old clp 578 * completes. 579 */ 580 NFSLOCKSTATE(); 581 while (clp->lc_cbref) { 582 clp->lc_flags |= LCL_WAKEUPWANTED; 583 (void)mtx_sleep(clp, NFSSTATEMUTEXPTR, PZERO - 1, 584 "nfsdclp", 10 * hz); 585 } 586 NFSUNLOCKSTATE(); 587 nfsrv_zapclient(clp, p); 588 *new_clpp = NULL; 589 } 590 591 out: 592 NFSEXITCODE2(error, nd); 593 return (error); 594 } 595 596 /* 597 * Check to see if the client id exists and optionally confirm it. 598 */ 599 int 600 nfsrv_getclient(nfsquad_t clientid, int opflags, struct nfsclient **clpp, 601 struct nfsdsession *nsep, nfsquad_t confirm, uint32_t cbprogram, 602 struct nfsrv_descript *nd, NFSPROC_T *p) 603 { 604 struct nfsclient *clp; 605 struct nfsstate *stp; 606 int i; 607 struct nfsclienthashhead *hp; 608 int error = 0, igotlock, doneok; 609 struct nfssessionhash *shp; 610 struct nfsdsession *sep; 611 uint64_t sessid[2]; 612 bool sess_replay; 613 static uint64_t next_sess = 0; 614 615 if (clpp) 616 *clpp = NULL; 617 if ((nd == NULL || (nd->nd_flag & ND_NFSV41) == 0 || 618 opflags != CLOPS_RENEW) && NFSD_VNET(nfsrvboottime) != 619 clientid.lval[0]) { 620 error = NFSERR_STALECLIENTID; 621 goto out; 622 } 623 624 /* 625 * If called with opflags == CLOPS_RENEW, the State Lock is 626 * already held. Otherwise, we need to get either that or, 627 * for the case of Confirm, lock out the nfsd threads. 628 */ 629 if (opflags & CLOPS_CONFIRM) { 630 NFSLOCKV4ROOTMUTEX(); 631 nfsv4_relref(&nfsv4rootfs_lock); 632 do { 633 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 634 NFSV4ROOTLOCKMUTEXPTR, NULL); 635 } while (!igotlock); 636 /* 637 * Create a new sessionid here, since we need to do it where 638 * there is a mutex held to serialize update of next_sess. 639 */ 640 if ((nd->nd_flag & ND_NFSV41) != 0) { 641 sessid[0] = ++next_sess; 642 sessid[1] = clientid.qval; 643 } 644 NFSUNLOCKV4ROOTMUTEX(); 645 } else if (opflags != CLOPS_RENEW) { 646 NFSLOCKSTATE(); 647 } 648 649 /* For NFSv4.1, the clp is acquired from the associated session. */ 650 if (nd != NULL && (nd->nd_flag & ND_NFSV41) != 0 && 651 opflags == CLOPS_RENEW) { 652 clp = NULL; 653 if ((nd->nd_flag & ND_HASSEQUENCE) != 0) { 654 shp = NFSSESSIONHASH(nd->nd_sessionid); 655 NFSLOCKSESSION(shp); 656 sep = nfsrv_findsession(nd->nd_sessionid); 657 if (sep != NULL) 658 clp = sep->sess_clp; 659 NFSUNLOCKSESSION(shp); 660 } 661 } else { 662 hp = NFSCLIENTHASH(clientid); 663 LIST_FOREACH(clp, hp, lc_hash) { 664 if (clp->lc_clientid.lval[1] == clientid.lval[1]) 665 break; 666 } 667 } 668 if (clp == NULL) { 669 if (opflags & CLOPS_CONFIRM) 670 error = NFSERR_STALECLIENTID; 671 else 672 error = NFSERR_EXPIRED; 673 } else if (clp->lc_flags & LCL_ADMINREVOKED) { 674 /* 675 * If marked admin revoked, just return the error. 676 */ 677 error = NFSERR_ADMINREVOKED; 678 } 679 if (error) { 680 if (opflags & CLOPS_CONFIRM) { 681 NFSLOCKV4ROOTMUTEX(); 682 nfsv4_unlock(&nfsv4rootfs_lock, 1); 683 NFSUNLOCKV4ROOTMUTEX(); 684 } else if (opflags != CLOPS_RENEW) { 685 NFSUNLOCKSTATE(); 686 } 687 goto out; 688 } 689 690 /* 691 * Perform any operations specified by the opflags. 692 */ 693 if (opflags & CLOPS_CONFIRM) { 694 sess_replay = false; 695 if ((nd->nd_flag & ND_NFSV41) != 0) { 696 /* 697 * For the case where lc_confirm.lval[0] == confirm.lval[0], 698 * use the new session, but with the previous sessionid. 699 * This is not exactly what the RFC describes, but should 700 * result in the same reply as the previous CreateSession. 701 */ 702 if (clp->lc_confirm.lval[0] + 1 == confirm.lval[0]) { 703 clp->lc_confirm.lval[0] = confirm.lval[0]; 704 clp->lc_prevsess = sessid[0]; 705 } else if (clp->lc_confirm.lval[0] == confirm.lval[0]) { 706 if (clp->lc_prevsess == 0) 707 error = NFSERR_SEQMISORDERED; 708 else 709 sessid[0] = clp->lc_prevsess; 710 sess_replay = true; 711 } else 712 error = NFSERR_SEQMISORDERED; 713 } else if ((nd->nd_flag & ND_NFSV41) == 0 && 714 clp->lc_confirm.qval != confirm.qval) 715 error = NFSERR_STALECLIENTID; 716 if (error == 0 && nfsrv_notsamecredname(NFSV4OP_CREATESESSION, 717 nd, clp)) 718 error = NFSERR_CLIDINUSE; 719 720 if (!error) { 721 if ((clp->lc_flags & (LCL_NEEDSCONFIRM | LCL_DONTCLEAN)) == 722 LCL_NEEDSCONFIRM) { 723 /* 724 * Hang onto the delegations (as old delegations) 725 * for an Open with CLAIM_DELEGATE_PREV unless in 726 * grace, but get rid of the rest of the state. 727 */ 728 nfsrv_cleanclient(clp, p); 729 nfsrv_freedeleglist(&clp->lc_olddeleg); 730 if (nfsrv_checkgrace(nd, clp, 0)) { 731 /* In grace, so just delete delegations */ 732 nfsrv_freedeleglist(&clp->lc_deleg); 733 } else { 734 LIST_FOREACH(stp, &clp->lc_deleg, ls_list) 735 stp->ls_flags |= NFSLCK_OLDDELEG; 736 clp->lc_delegtime = NFSD_MONOSEC + 737 nfsrv_lease + NFSRV_LEASEDELTA; 738 LIST_NEWHEAD(&clp->lc_olddeleg, &clp->lc_deleg, 739 ls_list); 740 } 741 if ((nd->nd_flag & ND_NFSV41) != 0) 742 clp->lc_program = cbprogram; 743 } 744 clp->lc_flags &= ~(LCL_NEEDSCONFIRM | LCL_DONTCLEAN); 745 if (clp->lc_program) 746 clp->lc_flags |= LCL_NEEDSCBNULL; 747 /* For NFSv4.1, link the session onto the client. */ 748 if (nsep != NULL) { 749 /* Hold a reference on the xprt for a backchannel. */ 750 if ((nsep->sess_crflags & NFSV4CRSESS_CONNBACKCHAN) 751 != 0 && !sess_replay) { 752 if (clp->lc_req.nr_client == NULL) 753 clp->lc_req.nr_client = (struct __rpc_client *) 754 clnt_bck_create(nd->nd_xprt->xp_socket, 755 cbprogram, NFSV4_CBVERS); 756 if (clp->lc_req.nr_client != NULL) { 757 SVC_ACQUIRE(nd->nd_xprt); 758 CLNT_ACQUIRE(clp->lc_req.nr_client); 759 nd->nd_xprt->xp_p2 = clp->lc_req.nr_client; 760 /* Disable idle timeout. */ 761 nd->nd_xprt->xp_idletimeout = 0; 762 nsep->sess_cbsess.nfsess_xprt = nd->nd_xprt; 763 } else 764 nsep->sess_crflags &= ~NFSV4CRSESS_CONNBACKCHAN; 765 } 766 NFSBCOPY(sessid, nsep->sess_sessionid, 767 NFSX_V4SESSIONID); 768 NFSBCOPY(sessid, nsep->sess_cbsess.nfsess_sessionid, 769 NFSX_V4SESSIONID); 770 if (!sess_replay) { 771 shp = NFSSESSIONHASH(nsep->sess_sessionid); 772 NFSLOCKSTATE(); 773 NFSLOCKSESSION(shp); 774 LIST_INSERT_HEAD(&shp->list, nsep, sess_hash); 775 LIST_INSERT_HEAD(&clp->lc_session, nsep, sess_list); 776 nsep->sess_clp = clp; 777 NFSUNLOCKSESSION(shp); 778 NFSUNLOCKSTATE(); 779 } 780 } 781 } 782 } else if (clp->lc_flags & LCL_NEEDSCONFIRM) { 783 error = NFSERR_EXPIRED; 784 } 785 786 /* 787 * If called by the Renew Op, we must check the principal. 788 */ 789 if (!error && (opflags & CLOPS_RENEWOP)) { 790 if (nfsrv_notsamecredname(0, nd, clp)) { 791 doneok = 0; 792 for (i = 0; i < nfsrv_statehashsize && doneok == 0; i++) { 793 LIST_FOREACH(stp, &clp->lc_stateid[i], ls_hash) { 794 if ((stp->ls_flags & NFSLCK_OPEN) && 795 stp->ls_uid == nd->nd_cred->cr_uid) { 796 doneok = 1; 797 break; 798 } 799 } 800 } 801 if (!doneok) 802 error = NFSERR_ACCES; 803 } 804 if (!error && (clp->lc_flags & LCL_CBDOWN)) 805 error = NFSERR_CBPATHDOWN; 806 } 807 if ((!error || error == NFSERR_CBPATHDOWN) && 808 (opflags & CLOPS_RENEW)) { 809 clp->lc_expiry = nfsrv_leaseexpiry(); 810 } 811 if (opflags & CLOPS_CONFIRM) { 812 NFSLOCKV4ROOTMUTEX(); 813 nfsv4_unlock(&nfsv4rootfs_lock, 1); 814 NFSUNLOCKV4ROOTMUTEX(); 815 } else if (opflags != CLOPS_RENEW) { 816 NFSUNLOCKSTATE(); 817 } 818 if (clpp) 819 *clpp = clp; 820 821 out: 822 NFSEXITCODE2(error, nd); 823 return (error); 824 } 825 826 /* 827 * Perform the NFSv4.1 destroy clientid. 828 */ 829 int 830 nfsrv_destroyclient(struct nfsrv_descript *nd, nfsquad_t clientid, NFSPROC_T *p) 831 { 832 struct nfsclient *clp; 833 struct nfsclienthashhead *hp; 834 int error = 0, i, igotlock; 835 836 if (NFSD_VNET(nfsrvboottime) != clientid.lval[0]) { 837 error = NFSERR_STALECLIENTID; 838 goto out; 839 } 840 841 /* Lock out other nfsd threads */ 842 NFSLOCKV4ROOTMUTEX(); 843 nfsv4_relref(&nfsv4rootfs_lock); 844 do { 845 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 846 NFSV4ROOTLOCKMUTEXPTR, NULL); 847 } while (igotlock == 0); 848 NFSUNLOCKV4ROOTMUTEX(); 849 850 hp = NFSCLIENTHASH(clientid); 851 LIST_FOREACH(clp, hp, lc_hash) { 852 if (clp->lc_clientid.lval[1] == clientid.lval[1]) 853 break; 854 } 855 if (clp == NULL) { 856 NFSLOCKV4ROOTMUTEX(); 857 nfsv4_unlock(&nfsv4rootfs_lock, 1); 858 NFSUNLOCKV4ROOTMUTEX(); 859 /* Just return ok, since it is gone. */ 860 goto out; 861 } 862 863 /* Check for the SP4_MACH_CRED case. */ 864 error = nfsrv_checkmachcred(NFSV4OP_DESTROYCLIENTID, nd, clp); 865 if (error != 0) { 866 NFSLOCKV4ROOTMUTEX(); 867 nfsv4_unlock(&nfsv4rootfs_lock, 1); 868 NFSUNLOCKV4ROOTMUTEX(); 869 goto out; 870 } 871 872 /* 873 * Free up all layouts on the clientid. Should the client return the 874 * layouts? 875 */ 876 nfsrv_freelayoutlist(clientid); 877 878 /* Scan for state on the clientid. */ 879 for (i = 0; i < nfsrv_statehashsize; i++) 880 if (!LIST_EMPTY(&clp->lc_stateid[i])) { 881 NFSLOCKV4ROOTMUTEX(); 882 nfsv4_unlock(&nfsv4rootfs_lock, 1); 883 NFSUNLOCKV4ROOTMUTEX(); 884 error = NFSERR_CLIENTIDBUSY; 885 goto out; 886 } 887 if (!LIST_EMPTY(&clp->lc_session) || !LIST_EMPTY(&clp->lc_deleg)) { 888 NFSLOCKV4ROOTMUTEX(); 889 nfsv4_unlock(&nfsv4rootfs_lock, 1); 890 NFSUNLOCKV4ROOTMUTEX(); 891 error = NFSERR_CLIENTIDBUSY; 892 goto out; 893 } 894 895 /* Destroy the clientid and return ok. */ 896 nfsrv_cleanclient(clp, p); 897 nfsrv_freedeleglist(&clp->lc_deleg); 898 nfsrv_freedeleglist(&clp->lc_olddeleg); 899 LIST_REMOVE(clp, lc_hash); 900 NFSLOCKV4ROOTMUTEX(); 901 nfsv4_unlock(&nfsv4rootfs_lock, 1); 902 NFSUNLOCKV4ROOTMUTEX(); 903 nfsrv_zapclient(clp, p); 904 out: 905 NFSEXITCODE2(error, nd); 906 return (error); 907 } 908 909 /* 910 * Called from the new nfssvc syscall to admin revoke a clientid. 911 * Returns 0 for success, error otherwise. 912 */ 913 int 914 nfsrv_adminrevoke(struct nfsd_clid *revokep, NFSPROC_T *p) 915 { 916 struct nfsclient *clp = NULL; 917 int i, error = 0; 918 int gotit, igotlock; 919 920 /* 921 * First, lock out the nfsd so that state won't change while the 922 * revocation record is being written to the stable storage restart 923 * file. 924 */ 925 NFSLOCKV4ROOTMUTEX(); 926 do { 927 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 928 NFSV4ROOTLOCKMUTEXPTR, NULL); 929 } while (!igotlock); 930 NFSUNLOCKV4ROOTMUTEX(); 931 932 /* 933 * Search for a match in the client list. 934 */ 935 gotit = i = 0; 936 while (i < nfsrv_clienthashsize && !gotit) { 937 LIST_FOREACH(clp, &NFSD_VNET(nfsclienthash)[i], lc_hash) { 938 if (revokep->nclid_idlen == clp->lc_idlen && 939 !NFSBCMP(revokep->nclid_id, clp->lc_id, clp->lc_idlen)) { 940 gotit = 1; 941 break; 942 } 943 } 944 i++; 945 } 946 if (!gotit) { 947 NFSLOCKV4ROOTMUTEX(); 948 nfsv4_unlock(&nfsv4rootfs_lock, 0); 949 NFSUNLOCKV4ROOTMUTEX(); 950 error = EPERM; 951 goto out; 952 } 953 954 /* 955 * Now, write out the revocation record 956 */ 957 nfsrv_writestable(clp->lc_id, clp->lc_idlen, NFSNST_REVOKE, p); 958 nfsrv_backupstable(); 959 960 /* 961 * and clear out the state, marking the clientid revoked. 962 */ 963 clp->lc_flags &= ~LCL_CALLBACKSON; 964 clp->lc_flags |= LCL_ADMINREVOKED; 965 nfsrv_cleanclient(clp, p); 966 nfsrv_freedeleglist(&clp->lc_deleg); 967 nfsrv_freedeleglist(&clp->lc_olddeleg); 968 NFSLOCKV4ROOTMUTEX(); 969 nfsv4_unlock(&nfsv4rootfs_lock, 0); 970 NFSUNLOCKV4ROOTMUTEX(); 971 972 out: 973 NFSEXITCODE(error); 974 return (error); 975 } 976 977 /* 978 * Dump out stats for all clients. Called from nfssvc(2), that is used 979 * nfsstatsv1. 980 */ 981 void 982 nfsrv_dumpclients(struct nfsd_dumpclients *dumpp, int maxcnt) 983 { 984 struct nfsclient *clp; 985 int i = 0, cnt = 0; 986 987 /* 988 * First, get a reference on the nfsv4rootfs_lock so that an 989 * exclusive lock cannot be acquired while dumping the clients. 990 */ 991 NFSLOCKV4ROOTMUTEX(); 992 nfsv4_getref(&nfsv4rootfs_lock, NULL, NFSV4ROOTLOCKMUTEXPTR, NULL); 993 NFSUNLOCKV4ROOTMUTEX(); 994 NFSLOCKSTATE(); 995 /* 996 * Rattle through the client lists until done. 997 */ 998 while (i < nfsrv_clienthashsize && cnt < maxcnt) { 999 clp = LIST_FIRST(&NFSD_VNET(nfsclienthash)[i]); 1000 while (clp != LIST_END(&NFSD_VNET(nfsclienthash)[i]) && cnt < 1001 maxcnt) { 1002 nfsrv_dumpaclient(clp, &dumpp[cnt]); 1003 cnt++; 1004 clp = LIST_NEXT(clp, lc_hash); 1005 } 1006 i++; 1007 } 1008 if (cnt < maxcnt) 1009 dumpp[cnt].ndcl_clid.nclid_idlen = 0; 1010 NFSUNLOCKSTATE(); 1011 NFSLOCKV4ROOTMUTEX(); 1012 nfsv4_relref(&nfsv4rootfs_lock); 1013 NFSUNLOCKV4ROOTMUTEX(); 1014 } 1015 1016 /* 1017 * Dump stats for a client. Must be called with the NFSSTATELOCK and spl'd. 1018 */ 1019 static void 1020 nfsrv_dumpaclient(struct nfsclient *clp, struct nfsd_dumpclients *dumpp) 1021 { 1022 struct nfsstate *stp, *openstp, *lckownstp; 1023 struct nfslock *lop; 1024 sa_family_t af; 1025 #ifdef INET 1026 struct sockaddr_in *rin; 1027 #endif 1028 #ifdef INET6 1029 struct sockaddr_in6 *rin6; 1030 #endif 1031 1032 dumpp->ndcl_nopenowners = dumpp->ndcl_nlockowners = 0; 1033 dumpp->ndcl_nopens = dumpp->ndcl_nlocks = 0; 1034 dumpp->ndcl_ndelegs = dumpp->ndcl_nolddelegs = 0; 1035 dumpp->ndcl_flags = clp->lc_flags; 1036 dumpp->ndcl_clid.nclid_idlen = clp->lc_idlen; 1037 NFSBCOPY(clp->lc_id, dumpp->ndcl_clid.nclid_id, clp->lc_idlen); 1038 af = clp->lc_req.nr_nam->sa_family; 1039 dumpp->ndcl_addrfam = af; 1040 switch (af) { 1041 #ifdef INET 1042 case AF_INET: 1043 rin = (struct sockaddr_in *)clp->lc_req.nr_nam; 1044 dumpp->ndcl_cbaddr.sin_addr = rin->sin_addr; 1045 break; 1046 #endif 1047 #ifdef INET6 1048 case AF_INET6: 1049 rin6 = (struct sockaddr_in6 *)clp->lc_req.nr_nam; 1050 dumpp->ndcl_cbaddr.sin6_addr = rin6->sin6_addr; 1051 break; 1052 #endif 1053 } 1054 1055 /* 1056 * Now, scan the state lists and total up the opens and locks. 1057 */ 1058 LIST_FOREACH(stp, &clp->lc_open, ls_list) { 1059 dumpp->ndcl_nopenowners++; 1060 LIST_FOREACH(openstp, &stp->ls_open, ls_list) { 1061 dumpp->ndcl_nopens++; 1062 LIST_FOREACH(lckownstp, &openstp->ls_open, ls_list) { 1063 dumpp->ndcl_nlockowners++; 1064 LIST_FOREACH(lop, &lckownstp->ls_lock, lo_lckowner) { 1065 dumpp->ndcl_nlocks++; 1066 } 1067 } 1068 } 1069 } 1070 1071 /* 1072 * and the delegation lists. 1073 */ 1074 LIST_FOREACH(stp, &clp->lc_deleg, ls_list) { 1075 dumpp->ndcl_ndelegs++; 1076 } 1077 LIST_FOREACH(stp, &clp->lc_olddeleg, ls_list) { 1078 dumpp->ndcl_nolddelegs++; 1079 } 1080 } 1081 1082 /* 1083 * Dump out lock stats for a file. 1084 */ 1085 void 1086 nfsrv_dumplocks(vnode_t vp, struct nfsd_dumplocks *ldumpp, int maxcnt, 1087 NFSPROC_T *p) 1088 { 1089 struct nfsstate *stp; 1090 struct nfslock *lop; 1091 int cnt = 0; 1092 struct nfslockfile *lfp; 1093 sa_family_t af; 1094 #ifdef INET 1095 struct sockaddr_in *rin; 1096 #endif 1097 #ifdef INET6 1098 struct sockaddr_in6 *rin6; 1099 #endif 1100 int ret; 1101 fhandle_t nfh; 1102 1103 ret = nfsrv_getlockfh(vp, 0, NULL, &nfh, p); 1104 /* 1105 * First, get a reference on the nfsv4rootfs_lock so that an 1106 * exclusive lock on it cannot be acquired while dumping the locks. 1107 */ 1108 NFSLOCKV4ROOTMUTEX(); 1109 nfsv4_getref(&nfsv4rootfs_lock, NULL, NFSV4ROOTLOCKMUTEXPTR, NULL); 1110 NFSUNLOCKV4ROOTMUTEX(); 1111 NFSLOCKSTATE(); 1112 if (!ret) 1113 ret = nfsrv_getlockfile(0, NULL, &lfp, &nfh, 0); 1114 if (ret) { 1115 ldumpp[0].ndlck_clid.nclid_idlen = 0; 1116 NFSUNLOCKSTATE(); 1117 NFSLOCKV4ROOTMUTEX(); 1118 nfsv4_relref(&nfsv4rootfs_lock); 1119 NFSUNLOCKV4ROOTMUTEX(); 1120 return; 1121 } 1122 1123 /* 1124 * For each open share on file, dump it out. 1125 */ 1126 stp = LIST_FIRST(&lfp->lf_open); 1127 while (stp != LIST_END(&lfp->lf_open) && cnt < maxcnt) { 1128 ldumpp[cnt].ndlck_flags = stp->ls_flags; 1129 ldumpp[cnt].ndlck_stateid.seqid = stp->ls_stateid.seqid; 1130 ldumpp[cnt].ndlck_stateid.other[0] = stp->ls_stateid.other[0]; 1131 ldumpp[cnt].ndlck_stateid.other[1] = stp->ls_stateid.other[1]; 1132 ldumpp[cnt].ndlck_stateid.other[2] = stp->ls_stateid.other[2]; 1133 ldumpp[cnt].ndlck_owner.nclid_idlen = 1134 stp->ls_openowner->ls_ownerlen; 1135 NFSBCOPY(stp->ls_openowner->ls_owner, 1136 ldumpp[cnt].ndlck_owner.nclid_id, 1137 stp->ls_openowner->ls_ownerlen); 1138 ldumpp[cnt].ndlck_clid.nclid_idlen = stp->ls_clp->lc_idlen; 1139 NFSBCOPY(stp->ls_clp->lc_id, ldumpp[cnt].ndlck_clid.nclid_id, 1140 stp->ls_clp->lc_idlen); 1141 af = stp->ls_clp->lc_req.nr_nam->sa_family; 1142 ldumpp[cnt].ndlck_addrfam = af; 1143 switch (af) { 1144 #ifdef INET 1145 case AF_INET: 1146 rin = (struct sockaddr_in *)stp->ls_clp->lc_req.nr_nam; 1147 ldumpp[cnt].ndlck_cbaddr.sin_addr = rin->sin_addr; 1148 break; 1149 #endif 1150 #ifdef INET6 1151 case AF_INET6: 1152 rin6 = (struct sockaddr_in6 *) 1153 stp->ls_clp->lc_req.nr_nam; 1154 ldumpp[cnt].ndlck_cbaddr.sin6_addr = rin6->sin6_addr; 1155 break; 1156 #endif 1157 } 1158 stp = LIST_NEXT(stp, ls_file); 1159 cnt++; 1160 } 1161 1162 /* 1163 * and all locks. 1164 */ 1165 lop = LIST_FIRST(&lfp->lf_lock); 1166 while (lop != LIST_END(&lfp->lf_lock) && cnt < maxcnt) { 1167 stp = lop->lo_stp; 1168 ldumpp[cnt].ndlck_flags = lop->lo_flags; 1169 ldumpp[cnt].ndlck_first = lop->lo_first; 1170 ldumpp[cnt].ndlck_end = lop->lo_end; 1171 ldumpp[cnt].ndlck_stateid.seqid = stp->ls_stateid.seqid; 1172 ldumpp[cnt].ndlck_stateid.other[0] = stp->ls_stateid.other[0]; 1173 ldumpp[cnt].ndlck_stateid.other[1] = stp->ls_stateid.other[1]; 1174 ldumpp[cnt].ndlck_stateid.other[2] = stp->ls_stateid.other[2]; 1175 ldumpp[cnt].ndlck_owner.nclid_idlen = stp->ls_ownerlen; 1176 NFSBCOPY(stp->ls_owner, ldumpp[cnt].ndlck_owner.nclid_id, 1177 stp->ls_ownerlen); 1178 ldumpp[cnt].ndlck_clid.nclid_idlen = stp->ls_clp->lc_idlen; 1179 NFSBCOPY(stp->ls_clp->lc_id, ldumpp[cnt].ndlck_clid.nclid_id, 1180 stp->ls_clp->lc_idlen); 1181 af = stp->ls_clp->lc_req.nr_nam->sa_family; 1182 ldumpp[cnt].ndlck_addrfam = af; 1183 switch (af) { 1184 #ifdef INET 1185 case AF_INET: 1186 rin = (struct sockaddr_in *)stp->ls_clp->lc_req.nr_nam; 1187 ldumpp[cnt].ndlck_cbaddr.sin_addr = rin->sin_addr; 1188 break; 1189 #endif 1190 #ifdef INET6 1191 case AF_INET6: 1192 rin6 = (struct sockaddr_in6 *) 1193 stp->ls_clp->lc_req.nr_nam; 1194 ldumpp[cnt].ndlck_cbaddr.sin6_addr = rin6->sin6_addr; 1195 break; 1196 #endif 1197 } 1198 lop = LIST_NEXT(lop, lo_lckfile); 1199 cnt++; 1200 } 1201 1202 /* 1203 * and the delegations. 1204 */ 1205 stp = LIST_FIRST(&lfp->lf_deleg); 1206 while (stp != LIST_END(&lfp->lf_deleg) && cnt < maxcnt) { 1207 ldumpp[cnt].ndlck_flags = stp->ls_flags; 1208 ldumpp[cnt].ndlck_stateid.seqid = stp->ls_stateid.seqid; 1209 ldumpp[cnt].ndlck_stateid.other[0] = stp->ls_stateid.other[0]; 1210 ldumpp[cnt].ndlck_stateid.other[1] = stp->ls_stateid.other[1]; 1211 ldumpp[cnt].ndlck_stateid.other[2] = stp->ls_stateid.other[2]; 1212 ldumpp[cnt].ndlck_owner.nclid_idlen = 0; 1213 ldumpp[cnt].ndlck_clid.nclid_idlen = stp->ls_clp->lc_idlen; 1214 NFSBCOPY(stp->ls_clp->lc_id, ldumpp[cnt].ndlck_clid.nclid_id, 1215 stp->ls_clp->lc_idlen); 1216 af = stp->ls_clp->lc_req.nr_nam->sa_family; 1217 ldumpp[cnt].ndlck_addrfam = af; 1218 switch (af) { 1219 #ifdef INET 1220 case AF_INET: 1221 rin = (struct sockaddr_in *)stp->ls_clp->lc_req.nr_nam; 1222 ldumpp[cnt].ndlck_cbaddr.sin_addr = rin->sin_addr; 1223 break; 1224 #endif 1225 #ifdef INET6 1226 case AF_INET6: 1227 rin6 = (struct sockaddr_in6 *) 1228 stp->ls_clp->lc_req.nr_nam; 1229 ldumpp[cnt].ndlck_cbaddr.sin6_addr = rin6->sin6_addr; 1230 break; 1231 #endif 1232 } 1233 stp = LIST_NEXT(stp, ls_file); 1234 cnt++; 1235 } 1236 1237 /* 1238 * If list isn't full, mark end of list by setting the client name 1239 * to zero length. 1240 */ 1241 if (cnt < maxcnt) 1242 ldumpp[cnt].ndlck_clid.nclid_idlen = 0; 1243 NFSUNLOCKSTATE(); 1244 NFSLOCKV4ROOTMUTEX(); 1245 nfsv4_relref(&nfsv4rootfs_lock); 1246 NFSUNLOCKV4ROOTMUTEX(); 1247 } 1248 1249 /* 1250 * Server timer routine. It can scan any linked list, so long 1251 * as it holds the spin/mutex lock and there is no exclusive lock on 1252 * nfsv4rootfs_lock. 1253 * (For OpenBSD, a kthread is ok. For FreeBSD, I think it is ok 1254 * to do this from a callout, since the spin locks work. For 1255 * Darwin, I'm not sure what will work correctly yet.) 1256 * Should be called once per second. 1257 */ 1258 void 1259 nfsrv_servertimer(void *arg __unused) 1260 { 1261 struct nfsclient *clp, *nclp; 1262 struct nfsstate *stp, *nstp; 1263 int got_ref, i; 1264 1265 /* 1266 * Make sure nfsboottime is set. This is used by V3 as well 1267 * as V4. Note that nfsboottime is not nfsrvboottime, which is 1268 * only used by the V4 server for leases. 1269 */ 1270 if (nfsboottime.tv_sec == 0) 1271 NFSSETBOOTTIME(nfsboottime); 1272 1273 /* 1274 * If server hasn't started yet, just return. 1275 */ 1276 NFSLOCKSTATE(); 1277 if (NFSD_VNET(nfsrv_stablefirst).nsf_eograce == 0) { 1278 NFSUNLOCKSTATE(); 1279 return; 1280 } 1281 if (!(NFSD_VNET(nfsrv_stablefirst).nsf_flags & NFSNSF_UPDATEDONE)) { 1282 if (!(NFSD_VNET(nfsrv_stablefirst).nsf_flags & 1283 NFSNSF_GRACEOVER) && 1284 NFSD_MONOSEC > NFSD_VNET(nfsrv_stablefirst).nsf_eograce) 1285 NFSD_VNET(nfsrv_stablefirst).nsf_flags |= 1286 (NFSNSF_GRACEOVER | NFSNSF_NEEDLOCK); 1287 NFSUNLOCKSTATE(); 1288 return; 1289 } 1290 1291 /* 1292 * Try and get a reference count on the nfsv4rootfs_lock so that 1293 * no nfsd thread can acquire an exclusive lock on it before this 1294 * call is done. If it is already exclusively locked, just return. 1295 */ 1296 NFSLOCKV4ROOTMUTEX(); 1297 got_ref = nfsv4_getref_nonblock(&nfsv4rootfs_lock); 1298 NFSUNLOCKV4ROOTMUTEX(); 1299 if (got_ref == 0) { 1300 NFSUNLOCKSTATE(); 1301 return; 1302 } 1303 1304 /* 1305 * For each client... 1306 */ 1307 for (i = 0; i < nfsrv_clienthashsize; i++) { 1308 clp = LIST_FIRST(&NFSD_VNET(nfsclienthash)[i]); 1309 while (clp != LIST_END(&NFSD_VNET(nfsclienthash)[i])) { 1310 nclp = LIST_NEXT(clp, lc_hash); 1311 if (!(clp->lc_flags & LCL_EXPIREIT)) { 1312 if (((clp->lc_expiry + NFSRV_STALELEASE) < NFSD_MONOSEC 1313 && ((LIST_EMPTY(&clp->lc_deleg) 1314 && LIST_EMPTY(&clp->lc_open)) || 1315 nfsrv_clients > nfsrv_clienthighwater)) || 1316 (clp->lc_expiry + NFSRV_MOULDYLEASE) < NFSD_MONOSEC || 1317 (clp->lc_expiry < NFSD_MONOSEC && 1318 (nfsrv_openpluslock * 10 / 9) > nfsrv_v4statelimit)) { 1319 /* 1320 * Lease has expired several nfsrv_lease times ago: 1321 * PLUS 1322 * - no state is associated with it 1323 * OR 1324 * - above high water mark for number of clients 1325 * (nfsrv_clienthighwater should be large enough 1326 * that this only occurs when clients fail to 1327 * use the same nfs_client_id4.id. Maybe somewhat 1328 * higher that the maximum number of clients that 1329 * will mount this server?) 1330 * OR 1331 * Lease has expired a very long time ago 1332 * OR 1333 * Lease has expired PLUS the number of opens + locks 1334 * has exceeded 90% of capacity 1335 * 1336 * --> Mark for expiry. The actual expiry will be done 1337 * by an nfsd sometime soon. 1338 */ 1339 clp->lc_flags |= LCL_EXPIREIT; 1340 NFSD_VNET(nfsrv_stablefirst).nsf_flags |= 1341 (NFSNSF_NEEDLOCK | NFSNSF_EXPIREDCLIENT); 1342 } else { 1343 /* 1344 * If there are no opens, increment no open tick cnt 1345 * If time exceeds NFSNOOPEN, mark it to be thrown away 1346 * otherwise, if there is an open, reset no open time 1347 * Hopefully, this will avoid excessive re-creation 1348 * of open owners and subsequent open confirms. 1349 */ 1350 stp = LIST_FIRST(&clp->lc_open); 1351 while (stp != LIST_END(&clp->lc_open)) { 1352 nstp = LIST_NEXT(stp, ls_list); 1353 if (LIST_EMPTY(&stp->ls_open)) { 1354 stp->ls_noopens++; 1355 if (stp->ls_noopens > NFSNOOPEN || 1356 (nfsrv_openpluslock * 2) > 1357 nfsrv_v4statelimit) 1358 NFSD_VNET(nfsrv_stablefirst).nsf_flags |= 1359 NFSNSF_NOOPENS; 1360 } else { 1361 stp->ls_noopens = 0; 1362 } 1363 stp = nstp; 1364 } 1365 } 1366 } 1367 clp = nclp; 1368 } 1369 } 1370 NFSUNLOCKSTATE(); 1371 NFSLOCKV4ROOTMUTEX(); 1372 nfsv4_relref(&nfsv4rootfs_lock); 1373 NFSUNLOCKV4ROOTMUTEX(); 1374 } 1375 1376 /* 1377 * The following set of functions free up the various data structures. 1378 */ 1379 /* 1380 * Clear out all open/lock state related to this nfsclient. 1381 * Caller must hold an exclusive lock on nfsv4rootfs_lock, so that 1382 * there are no other active nfsd threads. 1383 */ 1384 void 1385 nfsrv_cleanclient(struct nfsclient *clp, NFSPROC_T *p) 1386 { 1387 struct nfsstate *stp, *nstp; 1388 struct nfsdsession *sep, *nsep; 1389 1390 LIST_FOREACH_SAFE(stp, &clp->lc_open, ls_list, nstp) 1391 nfsrv_freeopenowner(stp, 1, p); 1392 if ((clp->lc_flags & LCL_ADMINREVOKED) == 0) 1393 LIST_FOREACH_SAFE(sep, &clp->lc_session, sess_list, nsep) 1394 (void)nfsrv_freesession(NULL, sep, NULL); 1395 } 1396 1397 /* 1398 * Free a client that has been cleaned. It should also already have been 1399 * removed from the lists. 1400 * (Just to be safe w.r.t. newnfs_disconnect(), call this function when 1401 * softclock interrupts are enabled.) 1402 */ 1403 void 1404 nfsrv_zapclient(struct nfsclient *clp, NFSPROC_T *p) 1405 { 1406 1407 #ifdef notyet 1408 if ((clp->lc_flags & (LCL_GSS | LCL_CALLBACKSON)) == 1409 (LCL_GSS | LCL_CALLBACKSON) && 1410 (clp->lc_hand.nfsh_flag & NFSG_COMPLETE) && 1411 clp->lc_handlelen > 0) { 1412 clp->lc_hand.nfsh_flag &= ~NFSG_COMPLETE; 1413 clp->lc_hand.nfsh_flag |= NFSG_DESTROYED; 1414 (void) nfsrv_docallback(clp, NFSV4PROC_CBNULL, 1415 NULL, 0, NULL, NULL, NULL, 0, p); 1416 } 1417 #endif 1418 newnfs_disconnect(NULL, &clp->lc_req); 1419 free(clp->lc_req.nr_nam, M_SONAME); 1420 NFSFREEMUTEX(&clp->lc_req.nr_mtx); 1421 free(clp->lc_stateid, M_NFSDCLIENT); 1422 free(clp, M_NFSDCLIENT); 1423 NFSLOCKSTATE(); 1424 NFSD_VNET(nfsstatsv1_p)->srvclients--; 1425 nfsrv_openpluslock--; 1426 nfsrv_clients--; 1427 NFSUNLOCKSTATE(); 1428 } 1429 1430 /* 1431 * Free a list of delegation state structures. 1432 * (This function will also free all nfslockfile structures that no 1433 * longer have associated state.) 1434 */ 1435 void 1436 nfsrv_freedeleglist(struct nfsstatehead *sthp) 1437 { 1438 struct nfsstate *stp, *nstp; 1439 1440 LIST_FOREACH_SAFE(stp, sthp, ls_list, nstp) { 1441 nfsrv_freedeleg(stp); 1442 } 1443 LIST_INIT(sthp); 1444 } 1445 1446 /* 1447 * Free up a delegation. 1448 */ 1449 static void 1450 nfsrv_freedeleg(struct nfsstate *stp) 1451 { 1452 struct nfslockfile *lfp; 1453 1454 LIST_REMOVE(stp, ls_hash); 1455 LIST_REMOVE(stp, ls_list); 1456 LIST_REMOVE(stp, ls_file); 1457 if ((stp->ls_flags & NFSLCK_DELEGWRITE) != 0) 1458 nfsrv_writedelegcnt--; 1459 lfp = stp->ls_lfp; 1460 if (LIST_EMPTY(&lfp->lf_open) && 1461 LIST_EMPTY(&lfp->lf_lock) && LIST_EMPTY(&lfp->lf_deleg) && 1462 LIST_EMPTY(&lfp->lf_locallock) && LIST_EMPTY(&lfp->lf_rollback) && 1463 lfp->lf_usecount == 0 && 1464 nfsv4_testlock(&lfp->lf_locallock_lck) == 0) 1465 nfsrv_freenfslockfile(lfp); 1466 free(stp, M_NFSDSTATE); 1467 NFSD_VNET(nfsstatsv1_p)->srvdelegates--; 1468 nfsrv_openpluslock--; 1469 nfsrv_delegatecnt--; 1470 } 1471 1472 /* 1473 * This function frees an open owner and all associated opens. 1474 */ 1475 static void 1476 nfsrv_freeopenowner(struct nfsstate *stp, int cansleep, NFSPROC_T *p) 1477 { 1478 struct nfsstate *nstp, *tstp; 1479 1480 LIST_REMOVE(stp, ls_list); 1481 /* 1482 * Now, free all associated opens. 1483 */ 1484 nstp = LIST_FIRST(&stp->ls_open); 1485 while (nstp != LIST_END(&stp->ls_open)) { 1486 tstp = nstp; 1487 nstp = LIST_NEXT(nstp, ls_list); 1488 (void) nfsrv_freeopen(tstp, NULL, cansleep, p); 1489 } 1490 if (stp->ls_op) 1491 nfsrvd_derefcache(stp->ls_op); 1492 free(stp, M_NFSDSTATE); 1493 NFSD_VNET(nfsstatsv1_p)->srvopenowners--; 1494 nfsrv_openpluslock--; 1495 } 1496 1497 /* 1498 * This function frees an open (nfsstate open structure) with all associated 1499 * lock_owners and locks. It also frees the nfslockfile structure iff there 1500 * are no other opens on the file. 1501 * Returns 1 if it free'd the nfslockfile, 0 otherwise. 1502 */ 1503 static int 1504 nfsrv_freeopen(struct nfsstate *stp, vnode_t vp, int cansleep, NFSPROC_T *p) 1505 { 1506 struct nfsstate *nstp, *tstp; 1507 struct nfslockfile *lfp; 1508 int ret; 1509 1510 LIST_REMOVE(stp, ls_hash); 1511 LIST_REMOVE(stp, ls_list); 1512 LIST_REMOVE(stp, ls_file); 1513 1514 lfp = stp->ls_lfp; 1515 /* 1516 * Now, free all lockowners associated with this open. 1517 */ 1518 LIST_FOREACH_SAFE(tstp, &stp->ls_open, ls_list, nstp) 1519 nfsrv_freelockowner(tstp, vp, cansleep, p); 1520 1521 /* 1522 * The nfslockfile is freed here if there are no locks 1523 * associated with the open. 1524 * If there are locks associated with the open, the 1525 * nfslockfile structure can be freed via nfsrv_freelockowner(). 1526 * Acquire the state mutex to avoid races with calls to 1527 * nfsrv_getlockfile(). 1528 */ 1529 if (cansleep != 0) 1530 NFSLOCKSTATE(); 1531 if (lfp != NULL && LIST_EMPTY(&lfp->lf_open) && 1532 LIST_EMPTY(&lfp->lf_deleg) && LIST_EMPTY(&lfp->lf_lock) && 1533 LIST_EMPTY(&lfp->lf_locallock) && LIST_EMPTY(&lfp->lf_rollback) && 1534 lfp->lf_usecount == 0 && 1535 (cansleep != 0 || nfsv4_testlock(&lfp->lf_locallock_lck) == 0)) { 1536 nfsrv_freenfslockfile(lfp); 1537 ret = 1; 1538 } else 1539 ret = 0; 1540 if (cansleep != 0) 1541 NFSUNLOCKSTATE(); 1542 free(stp, M_NFSDSTATE); 1543 NFSD_VNET(nfsstatsv1_p)->srvopens--; 1544 nfsrv_openpluslock--; 1545 return (ret); 1546 } 1547 1548 /* 1549 * Frees a lockowner and all associated locks. 1550 */ 1551 static void 1552 nfsrv_freelockowner(struct nfsstate *stp, vnode_t vp, int cansleep, 1553 NFSPROC_T *p) 1554 { 1555 1556 LIST_REMOVE(stp, ls_hash); 1557 LIST_REMOVE(stp, ls_list); 1558 nfsrv_freeallnfslocks(stp, vp, cansleep, p); 1559 if (stp->ls_op) 1560 nfsrvd_derefcache(stp->ls_op); 1561 free(stp, M_NFSDSTATE); 1562 NFSD_VNET(nfsstatsv1_p)->srvlockowners--; 1563 nfsrv_openpluslock--; 1564 } 1565 1566 /* 1567 * Free all the nfs locks on a lockowner. 1568 */ 1569 static void 1570 nfsrv_freeallnfslocks(struct nfsstate *stp, vnode_t vp, int cansleep, 1571 NFSPROC_T *p) 1572 { 1573 struct nfslock *lop, *nlop; 1574 struct nfsrollback *rlp, *nrlp; 1575 struct nfslockfile *lfp = NULL; 1576 int gottvp = 0; 1577 vnode_t tvp = NULL; 1578 uint64_t first, end; 1579 1580 if (vp != NULL) 1581 ASSERT_VOP_UNLOCKED(vp, "nfsrv_freeallnfslocks: vnode locked"); 1582 lop = LIST_FIRST(&stp->ls_lock); 1583 while (lop != LIST_END(&stp->ls_lock)) { 1584 nlop = LIST_NEXT(lop, lo_lckowner); 1585 /* 1586 * Since all locks should be for the same file, lfp should 1587 * not change. 1588 */ 1589 if (lfp == NULL) 1590 lfp = lop->lo_lfp; 1591 else if (lfp != lop->lo_lfp) 1592 panic("allnfslocks"); 1593 /* 1594 * If vp is NULL and cansleep != 0, a vnode must be acquired 1595 * from the file handle. This only occurs when called from 1596 * nfsrv_cleanclient(). 1597 */ 1598 if (gottvp == 0) { 1599 if (nfsrv_dolocallocks == 0) 1600 tvp = NULL; 1601 else if (vp == NULL && cansleep != 0) { 1602 tvp = nfsvno_getvp(&lfp->lf_fh); 1603 if (tvp != NULL) 1604 NFSVOPUNLOCK(tvp); 1605 } else 1606 tvp = vp; 1607 gottvp = 1; 1608 } 1609 1610 if (tvp != NULL) { 1611 if (cansleep == 0) 1612 panic("allnfs2"); 1613 first = lop->lo_first; 1614 end = lop->lo_end; 1615 nfsrv_freenfslock(lop); 1616 nfsrv_localunlock(tvp, lfp, first, end, p); 1617 LIST_FOREACH_SAFE(rlp, &lfp->lf_rollback, rlck_list, 1618 nrlp) 1619 free(rlp, M_NFSDROLLBACK); 1620 LIST_INIT(&lfp->lf_rollback); 1621 } else 1622 nfsrv_freenfslock(lop); 1623 lop = nlop; 1624 } 1625 if (vp == NULL && tvp != NULL) 1626 vrele(tvp); 1627 } 1628 1629 /* 1630 * Free an nfslock structure. 1631 */ 1632 static void 1633 nfsrv_freenfslock(struct nfslock *lop) 1634 { 1635 1636 if (lop->lo_lckfile.le_prev != NULL) { 1637 LIST_REMOVE(lop, lo_lckfile); 1638 NFSD_VNET(nfsstatsv1_p)->srvlocks--; 1639 nfsrv_openpluslock--; 1640 } 1641 LIST_REMOVE(lop, lo_lckowner); 1642 free(lop, M_NFSDLOCK); 1643 } 1644 1645 /* 1646 * This function frees an nfslockfile structure. 1647 */ 1648 static void 1649 nfsrv_freenfslockfile(struct nfslockfile *lfp) 1650 { 1651 1652 LIST_REMOVE(lfp, lf_hash); 1653 free(lfp, M_NFSDLOCKFILE); 1654 } 1655 1656 /* 1657 * This function looks up an nfsstate structure via stateid. 1658 */ 1659 static int 1660 nfsrv_getstate(struct nfsclient *clp, nfsv4stateid_t *stateidp, __unused u_int32_t flags, 1661 struct nfsstate **stpp) 1662 { 1663 struct nfsstate *stp; 1664 struct nfsstatehead *hp; 1665 int error = 0; 1666 1667 *stpp = NULL; 1668 hp = NFSSTATEHASH(clp, *stateidp); 1669 LIST_FOREACH(stp, hp, ls_hash) { 1670 if (!NFSBCMP(stp->ls_stateid.other, stateidp->other, 1671 NFSX_STATEIDOTHER)) 1672 break; 1673 } 1674 1675 /* 1676 * If no state id in list, return NFSERR_BADSTATEID. 1677 */ 1678 if (stp == LIST_END(hp)) { 1679 error = NFSERR_BADSTATEID; 1680 goto out; 1681 } 1682 *stpp = stp; 1683 1684 out: 1685 NFSEXITCODE(error); 1686 return (error); 1687 } 1688 1689 /* 1690 * This function gets an nfsstate structure via owner string. 1691 */ 1692 static void 1693 nfsrv_getowner(struct nfsstatehead *hp, struct nfsstate *new_stp, 1694 struct nfsstate **stpp) 1695 { 1696 struct nfsstate *stp; 1697 1698 *stpp = NULL; 1699 LIST_FOREACH(stp, hp, ls_list) { 1700 if (new_stp->ls_ownerlen == stp->ls_ownerlen && 1701 !NFSBCMP(new_stp->ls_owner,stp->ls_owner,stp->ls_ownerlen)) { 1702 *stpp = stp; 1703 return; 1704 } 1705 } 1706 } 1707 1708 /* 1709 * Lock control function called to update lock status. 1710 * Returns 0 upon success, -1 if there is no lock and the flags indicate 1711 * that one isn't to be created and an NFSERR_xxx for other errors. 1712 * The structures new_stp and new_lop are passed in as pointers that should 1713 * be set to NULL if the structure is used and shouldn't be free'd. 1714 * For the NFSLCK_TEST and NFSLCK_CHECK cases, the structures are 1715 * never used and can safely be allocated on the stack. For all other 1716 * cases, *new_stpp and *new_lopp should be malloc'd before the call, 1717 * in case they are used. 1718 */ 1719 int 1720 nfsrv_lockctrl(vnode_t vp, struct nfsstate **new_stpp, 1721 struct nfslock **new_lopp, struct nfslockconflict *cfp, 1722 nfsquad_t clientid, nfsv4stateid_t *stateidp, 1723 __unused struct nfsexstuff *exp, 1724 struct nfsrv_descript *nd, NFSPROC_T *p) 1725 { 1726 struct nfslock *lop; 1727 struct nfsstate *new_stp = *new_stpp; 1728 struct nfslock *new_lop = *new_lopp; 1729 struct nfsstate *tstp, *mystp, *nstp; 1730 int specialid = 0; 1731 struct nfslockfile *lfp; 1732 struct nfslock *other_lop = NULL; 1733 struct nfsstate *stp, *lckstp = NULL; 1734 struct nfsclient *clp = NULL; 1735 u_int32_t bits; 1736 int error = 0, haslock = 0, ret, reterr; 1737 int getlckret, delegation = 0, filestruct_locked, vnode_unlocked = 0; 1738 fhandle_t nfh; 1739 uint64_t first, end; 1740 uint32_t lock_flags; 1741 1742 if (new_stp->ls_flags & (NFSLCK_CHECK | NFSLCK_SETATTR)) { 1743 /* 1744 * Note the special cases of "all 1s" or "all 0s" stateids and 1745 * let reads with all 1s go ahead. 1746 */ 1747 if (new_stp->ls_stateid.seqid == 0x0 && 1748 new_stp->ls_stateid.other[0] == 0x0 && 1749 new_stp->ls_stateid.other[1] == 0x0 && 1750 new_stp->ls_stateid.other[2] == 0x0) 1751 specialid = 1; 1752 else if (new_stp->ls_stateid.seqid == 0xffffffff && 1753 new_stp->ls_stateid.other[0] == 0xffffffff && 1754 new_stp->ls_stateid.other[1] == 0xffffffff && 1755 new_stp->ls_stateid.other[2] == 0xffffffff) 1756 specialid = 2; 1757 } 1758 1759 /* 1760 * Check for restart conditions (client and server). 1761 */ 1762 error = nfsrv_checkrestart(clientid, new_stp->ls_flags, 1763 &new_stp->ls_stateid, specialid); 1764 if (error) 1765 goto out; 1766 1767 /* 1768 * Check for state resource limit exceeded. 1769 */ 1770 if ((new_stp->ls_flags & NFSLCK_LOCK) && 1771 nfsrv_openpluslock > nfsrv_v4statelimit) { 1772 error = NFSERR_RESOURCE; 1773 goto out; 1774 } 1775 1776 /* 1777 * For the lock case, get another nfslock structure, 1778 * just in case we need it. 1779 * Malloc now, before we start sifting through the linked lists, 1780 * in case we have to wait for memory. 1781 */ 1782 tryagain: 1783 if (new_stp->ls_flags & NFSLCK_LOCK) 1784 other_lop = malloc(sizeof (struct nfslock), 1785 M_NFSDLOCK, M_WAITOK); 1786 filestruct_locked = 0; 1787 reterr = 0; 1788 lfp = NULL; 1789 1790 /* 1791 * Get the lockfile structure for CFH now, so we can do a sanity 1792 * check against the stateid, before incrementing the seqid#, since 1793 * we want to return NFSERR_BADSTATEID on failure and the seqid# 1794 * shouldn't be incremented for this case. 1795 * If nfsrv_getlockfile() returns -1, it means "not found", which 1796 * will be handled later. 1797 * If we are doing Lock/LockU and local locking is enabled, sleep 1798 * lock the nfslockfile structure. 1799 */ 1800 getlckret = nfsrv_getlockfh(vp, new_stp->ls_flags, NULL, &nfh, p); 1801 NFSLOCKSTATE(); 1802 if (getlckret == 0) { 1803 if ((new_stp->ls_flags & (NFSLCK_LOCK | NFSLCK_UNLOCK)) != 0 && 1804 nfsrv_dolocallocks != 0 && nd->nd_repstat == 0) { 1805 getlckret = nfsrv_getlockfile(new_stp->ls_flags, NULL, 1806 &lfp, &nfh, 1); 1807 if (getlckret == 0) 1808 filestruct_locked = 1; 1809 } else 1810 getlckret = nfsrv_getlockfile(new_stp->ls_flags, NULL, 1811 &lfp, &nfh, 0); 1812 } 1813 if (getlckret != 0 && getlckret != -1) 1814 reterr = getlckret; 1815 1816 if (filestruct_locked != 0) { 1817 LIST_INIT(&lfp->lf_rollback); 1818 if ((new_stp->ls_flags & NFSLCK_LOCK)) { 1819 /* 1820 * For local locking, do the advisory locking now, so 1821 * that any conflict can be detected. A failure later 1822 * can be rolled back locally. If an error is returned, 1823 * struct nfslockfile has been unlocked and any local 1824 * locking rolled back. 1825 */ 1826 NFSUNLOCKSTATE(); 1827 if (vnode_unlocked == 0) { 1828 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl1"); 1829 vnode_unlocked = 1; 1830 NFSVOPUNLOCK(vp); 1831 } 1832 reterr = nfsrv_locallock(vp, lfp, 1833 (new_lop->lo_flags & (NFSLCK_READ | NFSLCK_WRITE)), 1834 new_lop->lo_first, new_lop->lo_end, cfp, p); 1835 NFSLOCKSTATE(); 1836 } 1837 } 1838 1839 if (specialid == 0) { 1840 if (new_stp->ls_flags & NFSLCK_TEST) { 1841 /* 1842 * RFC 3530 does not list LockT as an op that renews a 1843 * lease, but the consensus seems to be that it is ok 1844 * for a server to do so. 1845 */ 1846 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 1847 (nfsquad_t)((u_quad_t)0), 0, nd, p); 1848 1849 /* 1850 * Since NFSERR_EXPIRED, NFSERR_ADMINREVOKED are not valid 1851 * error returns for LockT, just go ahead and test for a lock, 1852 * since there are no locks for this client, but other locks 1853 * can conflict. (ie. same client will always be false) 1854 */ 1855 if (error == NFSERR_EXPIRED || error == NFSERR_ADMINREVOKED) 1856 error = 0; 1857 lckstp = new_stp; 1858 } else { 1859 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 1860 (nfsquad_t)((u_quad_t)0), 0, nd, p); 1861 if (error == 0) 1862 /* 1863 * Look up the stateid 1864 */ 1865 error = nfsrv_getstate(clp, &new_stp->ls_stateid, 1866 new_stp->ls_flags, &stp); 1867 /* 1868 * do some sanity checks for an unconfirmed open or a 1869 * stateid that refers to the wrong file, for an open stateid 1870 */ 1871 if (error == 0 && (stp->ls_flags & NFSLCK_OPEN) && 1872 ((stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM) || 1873 (getlckret == 0 && stp->ls_lfp != lfp))){ 1874 /* 1875 * NFSLCK_SETATTR should return OK rather than NFSERR_BADSTATEID 1876 * The only exception is using SETATTR with SIZE. 1877 * */ 1878 if ((new_stp->ls_flags & 1879 (NFSLCK_SETATTR | NFSLCK_CHECK)) != NFSLCK_SETATTR) 1880 error = NFSERR_BADSTATEID; 1881 } 1882 1883 if (error == 0 && 1884 (stp->ls_flags & (NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) && 1885 getlckret == 0 && stp->ls_lfp != lfp) 1886 error = NFSERR_BADSTATEID; 1887 1888 /* 1889 * If the lockowner stateid doesn't refer to the same file, 1890 * I believe that is considered ok, since some clients will 1891 * only create a single lockowner and use that for all locks 1892 * on all files. 1893 * For now, log it as a diagnostic, instead of considering it 1894 * a BadStateid. 1895 */ 1896 if (error == 0 && (stp->ls_flags & 1897 (NFSLCK_OPEN | NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) == 0 && 1898 getlckret == 0 && stp->ls_lfp != lfp) { 1899 #ifdef DIAGNOSTIC 1900 printf("Got a lock statid for different file open\n"); 1901 #endif 1902 /* 1903 error = NFSERR_BADSTATEID; 1904 */ 1905 } 1906 1907 if (error == 0) { 1908 if (new_stp->ls_flags & NFSLCK_OPENTOLOCK) { 1909 /* 1910 * If haslock set, we've already checked the seqid. 1911 */ 1912 if (!haslock) { 1913 if (stp->ls_flags & NFSLCK_OPEN) 1914 error = nfsrv_checkseqid(nd, new_stp->ls_seq, 1915 stp->ls_openowner, new_stp->ls_op); 1916 else 1917 error = NFSERR_BADSTATEID; 1918 } 1919 if (!error) 1920 nfsrv_getowner(&stp->ls_open, new_stp, &lckstp); 1921 if (lckstp) { 1922 /* 1923 * For NFSv4.1 and NFSv4.2 allow an 1924 * open_to_lock_owner when the lock_owner already 1925 * exists. Just clear NFSLCK_OPENTOLOCK so that 1926 * a new lock_owner will not be created. 1927 * RFC7530 states that the error for NFSv4.0 1928 * is NFS4ERR_BAD_SEQID. 1929 */ 1930 if ((nd->nd_flag & ND_NFSV41) != 0) 1931 new_stp->ls_flags &= ~NFSLCK_OPENTOLOCK; 1932 else 1933 error = NFSERR_BADSEQID; 1934 } else 1935 lckstp = new_stp; 1936 } else if (new_stp->ls_flags&(NFSLCK_LOCK|NFSLCK_UNLOCK)) { 1937 /* 1938 * If haslock set, ditto above. 1939 */ 1940 if (!haslock) { 1941 if (stp->ls_flags & NFSLCK_OPEN) 1942 error = NFSERR_BADSTATEID; 1943 else 1944 error = nfsrv_checkseqid(nd, new_stp->ls_seq, 1945 stp, new_stp->ls_op); 1946 } 1947 lckstp = stp; 1948 } else { 1949 lckstp = stp; 1950 } 1951 } 1952 /* 1953 * If the seqid part of the stateid isn't the same, return 1954 * NFSERR_OLDSTATEID for cases other than I/O Ops. 1955 * For I/O Ops, only return NFSERR_OLDSTATEID if 1956 * nfsrv_returnoldstateid is set. (The consensus on the email 1957 * list was that most clients would prefer to not receive 1958 * NFSERR_OLDSTATEID for I/O Ops, but the RFC suggests that that 1959 * is what will happen, so I use the nfsrv_returnoldstateid to 1960 * allow for either server configuration.) 1961 */ 1962 if (!error && stp->ls_stateid.seqid!=new_stp->ls_stateid.seqid && 1963 (((nd->nd_flag & ND_NFSV41) == 0 && 1964 (!(new_stp->ls_flags & NFSLCK_CHECK) || 1965 nfsrv_returnoldstateid)) || 1966 ((nd->nd_flag & ND_NFSV41) != 0 && 1967 new_stp->ls_stateid.seqid != 0))) 1968 error = NFSERR_OLDSTATEID; 1969 } 1970 } 1971 1972 /* 1973 * Now we can check for grace. 1974 */ 1975 if (!error) 1976 error = nfsrv_checkgrace(nd, clp, new_stp->ls_flags); 1977 if ((new_stp->ls_flags & NFSLCK_RECLAIM) && !error && 1978 nfsrv_checkstable(clp)) 1979 error = NFSERR_NOGRACE; 1980 /* 1981 * If we successfully Reclaimed state, note that. 1982 */ 1983 if ((new_stp->ls_flags & NFSLCK_RECLAIM) && !error) 1984 nfsrv_markstable(clp); 1985 1986 /* 1987 * At this point, either error == NFSERR_BADSTATEID or the 1988 * seqid# has been updated, so we can return any error. 1989 * If error == 0, there may be an error in: 1990 * nd_repstat - Set by the calling function. 1991 * reterr - Set above, if getting the nfslockfile structure 1992 * or acquiring the local lock failed. 1993 * (If both of these are set, nd_repstat should probably be 1994 * returned, since that error was detected before this 1995 * function call.) 1996 */ 1997 if (error != 0 || nd->nd_repstat != 0 || reterr != 0) { 1998 if (error == 0) { 1999 if (nd->nd_repstat != 0) 2000 error = nd->nd_repstat; 2001 else 2002 error = reterr; 2003 } 2004 if (filestruct_locked != 0) { 2005 /* Roll back local locks. */ 2006 NFSUNLOCKSTATE(); 2007 if (vnode_unlocked == 0) { 2008 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl2"); 2009 vnode_unlocked = 1; 2010 NFSVOPUNLOCK(vp); 2011 } 2012 nfsrv_locallock_rollback(vp, lfp, p); 2013 NFSLOCKSTATE(); 2014 nfsrv_unlocklf(lfp); 2015 } 2016 NFSUNLOCKSTATE(); 2017 goto out; 2018 } 2019 2020 /* 2021 * Check the nfsrv_getlockfile return. 2022 * Returned -1 if no structure found. 2023 */ 2024 if (getlckret == -1) { 2025 error = NFSERR_EXPIRED; 2026 /* 2027 * Called from lockt, so no lock is OK. 2028 */ 2029 if (new_stp->ls_flags & NFSLCK_TEST) { 2030 error = 0; 2031 } else if (new_stp->ls_flags & 2032 (NFSLCK_CHECK | NFSLCK_SETATTR)) { 2033 /* 2034 * Called to check for a lock, OK if the stateid is all 2035 * 1s or all 0s, but there should be an nfsstate 2036 * otherwise. 2037 * (ie. If there is no open, I'll assume no share 2038 * deny bits.) 2039 */ 2040 if (specialid) 2041 error = 0; 2042 else 2043 error = NFSERR_BADSTATEID; 2044 } 2045 NFSUNLOCKSTATE(); 2046 goto out; 2047 } 2048 2049 /* 2050 * For NFSLCK_CHECK and NFSLCK_LOCK, test for a share conflict. 2051 * For NFSLCK_CHECK, allow a read if write access is granted, 2052 * but check for a deny. For NFSLCK_LOCK, require correct access, 2053 * which implies a conflicting deny can't exist. 2054 */ 2055 if (new_stp->ls_flags & (NFSLCK_CHECK | NFSLCK_LOCK)) { 2056 /* 2057 * Four kinds of state id: 2058 * - specialid (all 0s or all 1s), only for NFSLCK_CHECK 2059 * - stateid for an open 2060 * - stateid for a delegation 2061 * - stateid for a lock owner 2062 */ 2063 if (!specialid) { 2064 if (stp->ls_flags & (NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) { 2065 delegation = 1; 2066 mystp = stp; 2067 nfsrv_delaydelegtimeout(stp); 2068 } else if (stp->ls_flags & NFSLCK_OPEN) { 2069 mystp = stp; 2070 } else { 2071 mystp = stp->ls_openstp; 2072 } 2073 /* 2074 * If locking or checking, require correct access 2075 * bit set. 2076 */ 2077 if (((new_stp->ls_flags & NFSLCK_LOCK) && 2078 !((new_lop->lo_flags >> NFSLCK_LOCKSHIFT) & 2079 mystp->ls_flags & NFSLCK_ACCESSBITS)) || 2080 ((new_stp->ls_flags & (NFSLCK_CHECK|NFSLCK_READACCESS)) == 2081 (NFSLCK_CHECK | NFSLCK_READACCESS) && 2082 !(mystp->ls_flags & NFSLCK_READACCESS) && 2083 nfsrv_allowreadforwriteopen == 0) || 2084 ((new_stp->ls_flags & (NFSLCK_CHECK|NFSLCK_WRITEACCESS)) == 2085 (NFSLCK_CHECK | NFSLCK_WRITEACCESS) && 2086 !(mystp->ls_flags & NFSLCK_WRITEACCESS))) { 2087 if (filestruct_locked != 0) { 2088 /* Roll back local locks. */ 2089 NFSUNLOCKSTATE(); 2090 if (vnode_unlocked == 0) { 2091 ASSERT_VOP_ELOCKED(vp, 2092 "nfsrv_lockctrl3"); 2093 vnode_unlocked = 1; 2094 NFSVOPUNLOCK(vp); 2095 } 2096 nfsrv_locallock_rollback(vp, lfp, p); 2097 NFSLOCKSTATE(); 2098 nfsrv_unlocklf(lfp); 2099 } 2100 NFSUNLOCKSTATE(); 2101 error = NFSERR_OPENMODE; 2102 goto out; 2103 } 2104 } else 2105 mystp = NULL; 2106 if ((new_stp->ls_flags & NFSLCK_CHECK) && !delegation) { 2107 /* 2108 * Check for a conflicting deny bit. 2109 */ 2110 LIST_FOREACH(tstp, &lfp->lf_open, ls_file) { 2111 if (tstp != mystp) { 2112 bits = tstp->ls_flags; 2113 bits >>= NFSLCK_SHIFT; 2114 if (new_stp->ls_flags & bits & NFSLCK_ACCESSBITS) { 2115 KASSERT(vnode_unlocked == 0, 2116 ("nfsrv_lockctrl: vnode unlocked1")); 2117 ret = nfsrv_clientconflict(tstp->ls_clp, &haslock, 2118 vp, p); 2119 if (ret == 1) { 2120 /* 2121 * nfsrv_clientconflict unlocks state 2122 * when it returns non-zero. 2123 */ 2124 lckstp = NULL; 2125 goto tryagain; 2126 } 2127 if (ret == 0) 2128 NFSUNLOCKSTATE(); 2129 if (ret == 2) 2130 error = NFSERR_PERM; 2131 else 2132 error = NFSERR_OPENMODE; 2133 goto out; 2134 } 2135 } 2136 } 2137 2138 /* We're outta here */ 2139 NFSUNLOCKSTATE(); 2140 goto out; 2141 } 2142 } 2143 2144 /* 2145 * For setattr, just get rid of all the Delegations for other clients. 2146 */ 2147 if (new_stp->ls_flags & NFSLCK_SETATTR) { 2148 KASSERT(vnode_unlocked == 0, 2149 ("nfsrv_lockctrl: vnode unlocked2")); 2150 ret = nfsrv_cleandeleg(vp, lfp, clp, &haslock, p); 2151 if (ret) { 2152 /* 2153 * nfsrv_cleandeleg() unlocks state when it 2154 * returns non-zero. 2155 */ 2156 if (ret == -1) { 2157 lckstp = NULL; 2158 goto tryagain; 2159 } 2160 error = ret; 2161 goto out; 2162 } 2163 if (!(new_stp->ls_flags & NFSLCK_CHECK) || 2164 (LIST_EMPTY(&lfp->lf_open) && LIST_EMPTY(&lfp->lf_lock) && 2165 LIST_EMPTY(&lfp->lf_deleg))) { 2166 NFSUNLOCKSTATE(); 2167 goto out; 2168 } 2169 } 2170 2171 /* 2172 * Check for a conflicting delegation. If one is found, call 2173 * nfsrv_delegconflict() to handle it. If the v4root lock hasn't 2174 * been set yet, it will get the lock. Otherwise, it will recall 2175 * the delegation. Then, we try try again... 2176 * I currently believe the conflict algorithm to be: 2177 * For Lock Ops (Lock/LockT/LockU) 2178 * - there is a conflict iff a different client has a write delegation 2179 * For Reading (Read Op) 2180 * - there is a conflict iff a different client has a write delegation 2181 * (the specialids are always a different client) 2182 * For Writing (Write/Setattr of size) 2183 * - there is a conflict if a different client has any delegation 2184 * - there is a conflict if the same client has a read delegation 2185 * (I don't understand why this isn't allowed, but that seems to be 2186 * the current consensus?) 2187 */ 2188 tstp = LIST_FIRST(&lfp->lf_deleg); 2189 while (tstp != LIST_END(&lfp->lf_deleg)) { 2190 nstp = LIST_NEXT(tstp, ls_file); 2191 if ((((new_stp->ls_flags&(NFSLCK_LOCK|NFSLCK_UNLOCK|NFSLCK_TEST))|| 2192 ((new_stp->ls_flags & NFSLCK_CHECK) && 2193 (new_lop->lo_flags & NFSLCK_READ))) && 2194 clp != tstp->ls_clp && 2195 (tstp->ls_flags & NFSLCK_DELEGWRITE)) || 2196 ((new_stp->ls_flags & NFSLCK_CHECK) && 2197 (new_lop->lo_flags & NFSLCK_WRITE) && 2198 (clp != tstp->ls_clp || 2199 (tstp->ls_flags & NFSLCK_DELEGREAD)))) { 2200 ret = 0; 2201 if (filestruct_locked != 0) { 2202 /* Roll back local locks. */ 2203 NFSUNLOCKSTATE(); 2204 if (vnode_unlocked == 0) { 2205 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl4"); 2206 NFSVOPUNLOCK(vp); 2207 } 2208 nfsrv_locallock_rollback(vp, lfp, p); 2209 NFSLOCKSTATE(); 2210 nfsrv_unlocklf(lfp); 2211 NFSUNLOCKSTATE(); 2212 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 2213 vnode_unlocked = 0; 2214 if (VN_IS_DOOMED(vp)) 2215 ret = NFSERR_SERVERFAULT; 2216 NFSLOCKSTATE(); 2217 } 2218 if (ret == 0) 2219 ret = nfsrv_delegconflict(tstp, &haslock, p, vp); 2220 if (ret) { 2221 /* 2222 * nfsrv_delegconflict unlocks state when it 2223 * returns non-zero, which it always does. 2224 */ 2225 if (other_lop) { 2226 free(other_lop, M_NFSDLOCK); 2227 other_lop = NULL; 2228 } 2229 if (ret == -1) { 2230 lckstp = NULL; 2231 goto tryagain; 2232 } 2233 error = ret; 2234 goto out; 2235 } 2236 /* Never gets here. */ 2237 } 2238 tstp = nstp; 2239 } 2240 2241 /* 2242 * Handle the unlock case by calling nfsrv_updatelock(). 2243 * (Should I have done some access checking above for unlock? For now, 2244 * just let it happen.) 2245 */ 2246 if (new_stp->ls_flags & NFSLCK_UNLOCK) { 2247 first = new_lop->lo_first; 2248 end = new_lop->lo_end; 2249 nfsrv_updatelock(stp, new_lopp, &other_lop, lfp); 2250 stateidp->seqid = ++(stp->ls_stateid.seqid); 2251 if ((nd->nd_flag & ND_NFSV41) != 0 && stateidp->seqid == 0) 2252 stateidp->seqid = stp->ls_stateid.seqid = 1; 2253 stateidp->other[0] = stp->ls_stateid.other[0]; 2254 stateidp->other[1] = stp->ls_stateid.other[1]; 2255 stateidp->other[2] = stp->ls_stateid.other[2]; 2256 if (filestruct_locked != 0) { 2257 NFSUNLOCKSTATE(); 2258 if (vnode_unlocked == 0) { 2259 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl5"); 2260 vnode_unlocked = 1; 2261 NFSVOPUNLOCK(vp); 2262 } 2263 /* Update the local locks. */ 2264 nfsrv_localunlock(vp, lfp, first, end, p); 2265 NFSLOCKSTATE(); 2266 nfsrv_unlocklf(lfp); 2267 } 2268 NFSUNLOCKSTATE(); 2269 goto out; 2270 } 2271 2272 /* 2273 * Search for a conflicting lock. A lock conflicts if: 2274 * - the lock range overlaps and 2275 * - at least one lock is a write lock and 2276 * - it is not owned by the same lock owner 2277 */ 2278 if (!delegation) { 2279 LIST_FOREACH(lop, &lfp->lf_lock, lo_lckfile) { 2280 if (new_lop->lo_end > lop->lo_first && 2281 new_lop->lo_first < lop->lo_end && 2282 (new_lop->lo_flags == NFSLCK_WRITE || 2283 lop->lo_flags == NFSLCK_WRITE) && 2284 lckstp != lop->lo_stp && 2285 (clp != lop->lo_stp->ls_clp || 2286 lckstp->ls_ownerlen != lop->lo_stp->ls_ownerlen || 2287 NFSBCMP(lckstp->ls_owner, lop->lo_stp->ls_owner, 2288 lckstp->ls_ownerlen))) { 2289 if (other_lop) { 2290 free(other_lop, M_NFSDLOCK); 2291 other_lop = NULL; 2292 } 2293 if (vnode_unlocked != 0) 2294 ret = nfsrv_clientconflict(lop->lo_stp->ls_clp, &haslock, 2295 NULL, p); 2296 else 2297 ret = nfsrv_clientconflict(lop->lo_stp->ls_clp, &haslock, 2298 vp, p); 2299 if (ret == 1) { 2300 if (filestruct_locked != 0) { 2301 if (vnode_unlocked == 0) { 2302 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl6"); 2303 NFSVOPUNLOCK(vp); 2304 } 2305 /* Roll back local locks. */ 2306 nfsrv_locallock_rollback(vp, lfp, p); 2307 NFSLOCKSTATE(); 2308 nfsrv_unlocklf(lfp); 2309 NFSUNLOCKSTATE(); 2310 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 2311 vnode_unlocked = 0; 2312 if (VN_IS_DOOMED(vp)) { 2313 error = NFSERR_SERVERFAULT; 2314 goto out; 2315 } 2316 } 2317 /* 2318 * nfsrv_clientconflict() unlocks state when it 2319 * returns non-zero. 2320 */ 2321 lckstp = NULL; 2322 goto tryagain; 2323 } 2324 /* 2325 * Found a conflicting lock, so record the conflict and 2326 * return the error. 2327 */ 2328 if (cfp != NULL && ret == 0) { 2329 cfp->cl_clientid.lval[0]=lop->lo_stp->ls_stateid.other[0]; 2330 cfp->cl_clientid.lval[1]=lop->lo_stp->ls_stateid.other[1]; 2331 cfp->cl_first = lop->lo_first; 2332 cfp->cl_end = lop->lo_end; 2333 cfp->cl_flags = lop->lo_flags; 2334 cfp->cl_ownerlen = lop->lo_stp->ls_ownerlen; 2335 NFSBCOPY(lop->lo_stp->ls_owner, cfp->cl_owner, 2336 cfp->cl_ownerlen); 2337 } 2338 if (ret == 2) 2339 error = NFSERR_PERM; 2340 else if (new_stp->ls_flags & NFSLCK_RECLAIM) 2341 error = NFSERR_RECLAIMCONFLICT; 2342 else if (new_stp->ls_flags & NFSLCK_CHECK) 2343 error = NFSERR_LOCKED; 2344 else 2345 error = NFSERR_DENIED; 2346 if (filestruct_locked != 0 && ret == 0) { 2347 /* Roll back local locks. */ 2348 NFSUNLOCKSTATE(); 2349 if (vnode_unlocked == 0) { 2350 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl7"); 2351 vnode_unlocked = 1; 2352 NFSVOPUNLOCK(vp); 2353 } 2354 nfsrv_locallock_rollback(vp, lfp, p); 2355 NFSLOCKSTATE(); 2356 nfsrv_unlocklf(lfp); 2357 } 2358 if (ret == 0) 2359 NFSUNLOCKSTATE(); 2360 goto out; 2361 } 2362 } 2363 } 2364 2365 /* 2366 * We only get here if there was no lock that conflicted. 2367 */ 2368 if (new_stp->ls_flags & (NFSLCK_TEST | NFSLCK_CHECK)) { 2369 NFSUNLOCKSTATE(); 2370 goto out; 2371 } 2372 2373 /* 2374 * We only get here when we are creating or modifying a lock. 2375 * There are two variants: 2376 * - exist_lock_owner where lock_owner exists 2377 * - open_to_lock_owner with new lock_owner 2378 */ 2379 first = new_lop->lo_first; 2380 end = new_lop->lo_end; 2381 lock_flags = new_lop->lo_flags; 2382 if (!(new_stp->ls_flags & NFSLCK_OPENTOLOCK)) { 2383 nfsrv_updatelock(lckstp, new_lopp, &other_lop, lfp); 2384 stateidp->seqid = ++(lckstp->ls_stateid.seqid); 2385 if ((nd->nd_flag & ND_NFSV41) != 0 && stateidp->seqid == 0) 2386 stateidp->seqid = lckstp->ls_stateid.seqid = 1; 2387 stateidp->other[0] = lckstp->ls_stateid.other[0]; 2388 stateidp->other[1] = lckstp->ls_stateid.other[1]; 2389 stateidp->other[2] = lckstp->ls_stateid.other[2]; 2390 } else { 2391 /* 2392 * The new open_to_lock_owner case. 2393 * Link the new nfsstate into the lists. 2394 */ 2395 new_stp->ls_seq = new_stp->ls_opentolockseq; 2396 nfsrvd_refcache(new_stp->ls_op); 2397 stateidp->seqid = new_stp->ls_stateid.seqid = 1; 2398 stateidp->other[0] = new_stp->ls_stateid.other[0] = 2399 clp->lc_clientid.lval[0]; 2400 stateidp->other[1] = new_stp->ls_stateid.other[1] = 2401 clp->lc_clientid.lval[1]; 2402 stateidp->other[2] = new_stp->ls_stateid.other[2] = 2403 nfsrv_nextstateindex(clp); 2404 new_stp->ls_clp = clp; 2405 LIST_INIT(&new_stp->ls_lock); 2406 new_stp->ls_openstp = stp; 2407 new_stp->ls_lfp = lfp; 2408 nfsrv_insertlock(new_lop, (struct nfslock *)new_stp, new_stp, 2409 lfp); 2410 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_stp->ls_stateid), 2411 new_stp, ls_hash); 2412 LIST_INSERT_HEAD(&stp->ls_open, new_stp, ls_list); 2413 *new_lopp = NULL; 2414 *new_stpp = NULL; 2415 NFSD_VNET(nfsstatsv1_p)->srvlockowners++; 2416 nfsrv_openpluslock++; 2417 } 2418 if (filestruct_locked != 0) { 2419 NFSUNLOCKSTATE(); 2420 nfsrv_locallock_commit(lfp, lock_flags, first, end); 2421 NFSLOCKSTATE(); 2422 nfsrv_unlocklf(lfp); 2423 } 2424 NFSUNLOCKSTATE(); 2425 2426 out: 2427 if (haslock) { 2428 NFSLOCKV4ROOTMUTEX(); 2429 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2430 NFSUNLOCKV4ROOTMUTEX(); 2431 } 2432 if (vnode_unlocked != 0) { 2433 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 2434 if (error == 0 && VN_IS_DOOMED(vp)) 2435 error = NFSERR_SERVERFAULT; 2436 } 2437 if (other_lop) 2438 free(other_lop, M_NFSDLOCK); 2439 NFSEXITCODE2(error, nd); 2440 return (error); 2441 } 2442 2443 /* 2444 * Check for state errors for Open. 2445 * repstat is passed back out as an error if more critical errors 2446 * are not detected. 2447 */ 2448 int 2449 nfsrv_opencheck(nfsquad_t clientid, nfsv4stateid_t *stateidp, 2450 struct nfsstate *new_stp, vnode_t vp, struct nfsrv_descript *nd, 2451 NFSPROC_T *p, int repstat) 2452 { 2453 struct nfsstate *stp, *nstp; 2454 struct nfsclient *clp; 2455 struct nfsstate *ownerstp; 2456 struct nfslockfile *lfp, *new_lfp; 2457 int error = 0, haslock = 0, ret, readonly = 0, getfhret = 0; 2458 2459 if ((new_stp->ls_flags & NFSLCK_SHAREBITS) == NFSLCK_READACCESS) 2460 readonly = 1; 2461 /* 2462 * Check for restart conditions (client and server). 2463 */ 2464 error = nfsrv_checkrestart(clientid, new_stp->ls_flags, 2465 &new_stp->ls_stateid, 0); 2466 if (error) 2467 goto out; 2468 2469 /* 2470 * Check for state resource limit exceeded. 2471 * Technically this should be SMP protected, but the worst 2472 * case error is "out by one or two" on the count when it 2473 * returns NFSERR_RESOURCE and the limit is just a rather 2474 * arbitrary high water mark, so no harm is done. 2475 */ 2476 if (nfsrv_openpluslock > nfsrv_v4statelimit) { 2477 error = NFSERR_RESOURCE; 2478 goto out; 2479 } 2480 2481 tryagain: 2482 new_lfp = malloc(sizeof (struct nfslockfile), 2483 M_NFSDLOCKFILE, M_WAITOK); 2484 if (vp) 2485 getfhret = nfsrv_getlockfh(vp, new_stp->ls_flags, new_lfp, 2486 NULL, p); 2487 NFSLOCKSTATE(); 2488 /* 2489 * Get the nfsclient structure. 2490 */ 2491 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 2492 (nfsquad_t)((u_quad_t)0), 0, nd, p); 2493 2494 /* 2495 * Look up the open owner. See if it needs confirmation and 2496 * check the seq#, as required. 2497 */ 2498 if (!error) 2499 nfsrv_getowner(&clp->lc_open, new_stp, &ownerstp); 2500 2501 if (!error && ownerstp) { 2502 error = nfsrv_checkseqid(nd, new_stp->ls_seq, ownerstp, 2503 new_stp->ls_op); 2504 /* 2505 * If the OpenOwner hasn't been confirmed, assume the 2506 * old one was a replay and this one is ok. 2507 * See: RFC3530 Sec. 14.2.18. 2508 */ 2509 if (error == NFSERR_BADSEQID && 2510 (ownerstp->ls_flags & NFSLCK_NEEDSCONFIRM)) 2511 error = 0; 2512 } 2513 2514 /* 2515 * Check for grace. 2516 */ 2517 if (!error) 2518 error = nfsrv_checkgrace(nd, clp, new_stp->ls_flags); 2519 if ((new_stp->ls_flags & NFSLCK_RECLAIM) && !error && 2520 nfsrv_checkstable(clp)) 2521 error = NFSERR_NOGRACE; 2522 2523 /* 2524 * If none of the above errors occurred, let repstat be 2525 * returned. 2526 */ 2527 if (repstat && !error) 2528 error = repstat; 2529 if (error) { 2530 NFSUNLOCKSTATE(); 2531 if (haslock) { 2532 NFSLOCKV4ROOTMUTEX(); 2533 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2534 NFSUNLOCKV4ROOTMUTEX(); 2535 } 2536 free(new_lfp, M_NFSDLOCKFILE); 2537 goto out; 2538 } 2539 2540 /* 2541 * If vp == NULL, the file doesn't exist yet, so return ok. 2542 * (This always happens on the first pass, so haslock must be 0.) 2543 */ 2544 if (vp == NULL) { 2545 NFSUNLOCKSTATE(); 2546 free(new_lfp, M_NFSDLOCKFILE); 2547 goto out; 2548 } 2549 2550 /* 2551 * Get the structure for the underlying file. 2552 */ 2553 if (getfhret) 2554 error = getfhret; 2555 else 2556 error = nfsrv_getlockfile(new_stp->ls_flags, &new_lfp, &lfp, 2557 NULL, 0); 2558 if (new_lfp) 2559 free(new_lfp, M_NFSDLOCKFILE); 2560 if (error) { 2561 NFSUNLOCKSTATE(); 2562 if (haslock) { 2563 NFSLOCKV4ROOTMUTEX(); 2564 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2565 NFSUNLOCKV4ROOTMUTEX(); 2566 } 2567 goto out; 2568 } 2569 2570 /* 2571 * Search for a conflicting open/share. 2572 */ 2573 if (new_stp->ls_flags & NFSLCK_DELEGCUR) { 2574 /* 2575 * For Delegate_Cur, search for the matching Delegation, 2576 * which indicates no conflict. 2577 * An old delegation should have been recovered by the 2578 * client doing a Claim_DELEGATE_Prev, so I won't let 2579 * it match and return NFSERR_EXPIRED. Should I let it 2580 * match? 2581 */ 2582 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) { 2583 if (!(stp->ls_flags & NFSLCK_OLDDELEG) && 2584 (((nd->nd_flag & ND_NFSV41) != 0 && 2585 stateidp->seqid == 0) || 2586 stateidp->seqid == stp->ls_stateid.seqid) && 2587 !NFSBCMP(stateidp->other, stp->ls_stateid.other, 2588 NFSX_STATEIDOTHER)) 2589 break; 2590 } 2591 if (stp == LIST_END(&lfp->lf_deleg) || 2592 ((new_stp->ls_flags & NFSLCK_WRITEACCESS) && 2593 (stp->ls_flags & NFSLCK_DELEGREAD))) { 2594 NFSUNLOCKSTATE(); 2595 if (haslock) { 2596 NFSLOCKV4ROOTMUTEX(); 2597 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2598 NFSUNLOCKV4ROOTMUTEX(); 2599 } 2600 error = NFSERR_EXPIRED; 2601 goto out; 2602 } 2603 } 2604 2605 /* 2606 * Check for access/deny bit conflicts. I check for the same 2607 * owner as well, in case the client didn't bother. 2608 */ 2609 LIST_FOREACH(stp, &lfp->lf_open, ls_file) { 2610 if (!(new_stp->ls_flags & NFSLCK_DELEGCUR) && 2611 (((new_stp->ls_flags & NFSLCK_ACCESSBITS) & 2612 ((stp->ls_flags>>NFSLCK_SHIFT) & NFSLCK_ACCESSBITS))|| 2613 ((stp->ls_flags & NFSLCK_ACCESSBITS) & 2614 ((new_stp->ls_flags>>NFSLCK_SHIFT)&NFSLCK_ACCESSBITS)))){ 2615 ret = nfsrv_clientconflict(stp->ls_clp,&haslock,vp,p); 2616 if (ret == 1) { 2617 /* 2618 * nfsrv_clientconflict() unlocks 2619 * state when it returns non-zero. 2620 */ 2621 goto tryagain; 2622 } 2623 if (ret == 2) 2624 error = NFSERR_PERM; 2625 else if (new_stp->ls_flags & NFSLCK_RECLAIM) 2626 error = NFSERR_RECLAIMCONFLICT; 2627 else 2628 error = NFSERR_SHAREDENIED; 2629 if (ret == 0) 2630 NFSUNLOCKSTATE(); 2631 if (haslock) { 2632 NFSLOCKV4ROOTMUTEX(); 2633 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2634 NFSUNLOCKV4ROOTMUTEX(); 2635 } 2636 goto out; 2637 } 2638 } 2639 2640 /* 2641 * Check for a conflicting delegation. If one is found, call 2642 * nfsrv_delegconflict() to handle it. If the v4root lock hasn't 2643 * been set yet, it will get the lock. Otherwise, it will recall 2644 * the delegation. Then, we try try again... 2645 * (If NFSLCK_DELEGCUR is set, it has a delegation, so there 2646 * isn't a conflict.) 2647 * I currently believe the conflict algorithm to be: 2648 * For Open with Read Access and Deny None 2649 * - there is a conflict iff a different client has a write delegation 2650 * For Open with other Write Access or any Deny except None 2651 * - there is a conflict if a different client has any delegation 2652 * - there is a conflict if the same client has a read delegation 2653 * (The current consensus is that this last case should be 2654 * considered a conflict since the client with a read delegation 2655 * could have done an Open with ReadAccess and WriteDeny 2656 * locally and then not have checked for the WriteDeny.) 2657 * The exception is a NFSv4.1/4.2 client that has requested 2658 * an atomic upgrade to a write delegation. 2659 * Don't check for a Reclaim, since that will be dealt with 2660 * by nfsrv_openctrl(). 2661 */ 2662 if (!(new_stp->ls_flags & 2663 (NFSLCK_DELEGPREV | NFSLCK_DELEGCUR | NFSLCK_RECLAIM))) { 2664 stp = LIST_FIRST(&lfp->lf_deleg); 2665 while (stp != LIST_END(&lfp->lf_deleg)) { 2666 nstp = LIST_NEXT(stp, ls_file); 2667 if ((readonly && stp->ls_clp != clp && 2668 (stp->ls_flags & NFSLCK_DELEGWRITE) != 0) || 2669 (!readonly && (stp->ls_clp != clp || 2670 ((stp->ls_flags & NFSLCK_DELEGREAD) != 0 && 2671 (new_stp->ls_flags & NFSLCK_WANTWDELEG) == 0)))) { 2672 ret = nfsrv_delegconflict(stp, &haslock, p, vp); 2673 if (ret) { 2674 /* 2675 * nfsrv_delegconflict() unlocks state 2676 * when it returns non-zero. 2677 */ 2678 if (ret == -1) 2679 goto tryagain; 2680 error = ret; 2681 goto out; 2682 } 2683 } 2684 stp = nstp; 2685 } 2686 } 2687 NFSUNLOCKSTATE(); 2688 if (haslock) { 2689 NFSLOCKV4ROOTMUTEX(); 2690 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2691 NFSUNLOCKV4ROOTMUTEX(); 2692 } 2693 2694 out: 2695 NFSEXITCODE2(error, nd); 2696 return (error); 2697 } 2698 2699 /* 2700 * Open control function to create/update open state for an open. 2701 */ 2702 int 2703 nfsrv_openctrl(struct nfsrv_descript *nd, vnode_t vp, 2704 struct nfsstate **new_stpp, nfsquad_t clientid, nfsv4stateid_t *stateidp, 2705 nfsv4stateid_t *delegstateidp, u_int32_t *rflagsp, struct nfsexstuff *exp, 2706 NFSPROC_T *p, u_quad_t filerev) 2707 { 2708 struct nfsstate *new_stp = *new_stpp; 2709 struct nfsstate *stp, *nstp; 2710 struct nfsstate *openstp = NULL, *new_open, *ownerstp, *new_deleg; 2711 struct nfslockfile *lfp, *new_lfp; 2712 struct nfsclient *clp; 2713 int error = 0, haslock = 0, ret, delegate = 1, writedeleg = 1; 2714 int readonly = 0, cbret = 1, getfhret = 0; 2715 int gotstate = 0, len = 0; 2716 u_char *clidp = NULL; 2717 2718 if ((new_stp->ls_flags & NFSLCK_SHAREBITS) == NFSLCK_READACCESS) 2719 readonly = 1; 2720 /* 2721 * Check for restart conditions (client and server). 2722 * (Paranoia, should have been detected by nfsrv_opencheck().) 2723 * If an error does show up, return NFSERR_EXPIRED, since the 2724 * the seqid# has already been incremented. 2725 */ 2726 error = nfsrv_checkrestart(clientid, new_stp->ls_flags, 2727 &new_stp->ls_stateid, 0); 2728 if (error) { 2729 printf("Nfsd: openctrl unexpected restart err=%d\n", 2730 error); 2731 error = NFSERR_EXPIRED; 2732 goto out; 2733 } 2734 2735 clidp = malloc(NFSV4_OPAQUELIMIT, M_TEMP, M_WAITOK); 2736 tryagain: 2737 new_lfp = malloc(sizeof (struct nfslockfile), 2738 M_NFSDLOCKFILE, M_WAITOK); 2739 new_open = malloc(sizeof (struct nfsstate), 2740 M_NFSDSTATE, M_WAITOK); 2741 new_deleg = malloc(sizeof (struct nfsstate), 2742 M_NFSDSTATE, M_WAITOK); 2743 getfhret = nfsrv_getlockfh(vp, new_stp->ls_flags, new_lfp, 2744 NULL, p); 2745 NFSLOCKSTATE(); 2746 /* 2747 * Get the client structure. Since the linked lists could be changed 2748 * by other nfsd processes if this process does a tsleep(), one of 2749 * two things must be done. 2750 * 1 - don't tsleep() 2751 * or 2752 * 2 - get the nfsv4_lock() { indicated by haslock == 1 } 2753 * before using the lists, since this lock stops the other 2754 * nfsd. This should only be used for rare cases, since it 2755 * essentially single threads the nfsd. 2756 * At this time, it is only done for cases where the stable 2757 * storage file must be written prior to completion of state 2758 * expiration. 2759 */ 2760 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 2761 (nfsquad_t)((u_quad_t)0), 0, nd, p); 2762 if (!error && (clp->lc_flags & LCL_NEEDSCBNULL) && 2763 clp->lc_program) { 2764 /* 2765 * This happens on the first open for a client 2766 * that supports callbacks. 2767 */ 2768 NFSUNLOCKSTATE(); 2769 /* 2770 * Although nfsrv_docallback() will sleep, clp won't 2771 * go away, since they are only removed when the 2772 * nfsv4_lock() has blocked the nfsd threads. The 2773 * fields in clp can change, but having multiple 2774 * threads do this Null callback RPC should be 2775 * harmless. 2776 */ 2777 cbret = nfsrv_docallback(clp, NFSV4PROC_CBNULL, 2778 NULL, 0, NULL, NULL, NULL, 0, p); 2779 NFSLOCKSTATE(); 2780 clp->lc_flags &= ~LCL_NEEDSCBNULL; 2781 if (!cbret) 2782 clp->lc_flags |= LCL_CALLBACKSON; 2783 } 2784 2785 /* 2786 * Look up the open owner. See if it needs confirmation and 2787 * check the seq#, as required. 2788 */ 2789 if (!error) 2790 nfsrv_getowner(&clp->lc_open, new_stp, &ownerstp); 2791 2792 if (error) { 2793 NFSUNLOCKSTATE(); 2794 printf("Nfsd: openctrl unexpected state err=%d\n", 2795 error); 2796 free(new_lfp, M_NFSDLOCKFILE); 2797 free(new_open, M_NFSDSTATE); 2798 free(new_deleg, M_NFSDSTATE); 2799 if (haslock) { 2800 NFSLOCKV4ROOTMUTEX(); 2801 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2802 NFSUNLOCKV4ROOTMUTEX(); 2803 } 2804 error = NFSERR_EXPIRED; 2805 goto out; 2806 } 2807 2808 if (new_stp->ls_flags & NFSLCK_RECLAIM) 2809 nfsrv_markstable(clp); 2810 2811 /* 2812 * Get the structure for the underlying file. 2813 */ 2814 if (getfhret) 2815 error = getfhret; 2816 else 2817 error = nfsrv_getlockfile(new_stp->ls_flags, &new_lfp, &lfp, 2818 NULL, 0); 2819 if (new_lfp) 2820 free(new_lfp, M_NFSDLOCKFILE); 2821 if (error) { 2822 NFSUNLOCKSTATE(); 2823 printf("Nfsd openctrl unexpected getlockfile err=%d\n", 2824 error); 2825 free(new_open, M_NFSDSTATE); 2826 free(new_deleg, M_NFSDSTATE); 2827 if (haslock) { 2828 NFSLOCKV4ROOTMUTEX(); 2829 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2830 NFSUNLOCKV4ROOTMUTEX(); 2831 } 2832 goto out; 2833 } 2834 2835 /* 2836 * Search for a conflicting open/share. 2837 */ 2838 if (new_stp->ls_flags & NFSLCK_DELEGCUR) { 2839 /* 2840 * For Delegate_Cur, search for the matching Delegation, 2841 * which indicates no conflict. 2842 * An old delegation should have been recovered by the 2843 * client doing a Claim_DELEGATE_Prev, so I won't let 2844 * it match and return NFSERR_EXPIRED. Should I let it 2845 * match? 2846 */ 2847 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) { 2848 if (!(stp->ls_flags & NFSLCK_OLDDELEG) && 2849 (((nd->nd_flag & ND_NFSV41) != 0 && 2850 stateidp->seqid == 0) || 2851 stateidp->seqid == stp->ls_stateid.seqid) && 2852 !NFSBCMP(stateidp->other, stp->ls_stateid.other, 2853 NFSX_STATEIDOTHER)) 2854 break; 2855 } 2856 if (stp == LIST_END(&lfp->lf_deleg) || 2857 ((new_stp->ls_flags & NFSLCK_WRITEACCESS) && 2858 (stp->ls_flags & NFSLCK_DELEGREAD))) { 2859 NFSUNLOCKSTATE(); 2860 printf("Nfsd openctrl unexpected expiry\n"); 2861 free(new_open, M_NFSDSTATE); 2862 free(new_deleg, M_NFSDSTATE); 2863 if (haslock) { 2864 NFSLOCKV4ROOTMUTEX(); 2865 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2866 NFSUNLOCKV4ROOTMUTEX(); 2867 } 2868 error = NFSERR_EXPIRED; 2869 goto out; 2870 } 2871 2872 /* 2873 * Don't issue a Delegation, since one already exists and 2874 * delay delegation timeout, as required. 2875 */ 2876 delegate = 0; 2877 nfsrv_delaydelegtimeout(stp); 2878 } 2879 2880 /* 2881 * Check for access/deny bit conflicts. I also check for the 2882 * same owner, since the client might not have bothered to check. 2883 * Also, note an open for the same file and owner, if found, 2884 * which is all we do here for Delegate_Cur, since conflict 2885 * checking is already done. 2886 */ 2887 LIST_FOREACH(stp, &lfp->lf_open, ls_file) { 2888 if (ownerstp && stp->ls_openowner == ownerstp) 2889 openstp = stp; 2890 if (!(new_stp->ls_flags & NFSLCK_DELEGCUR)) { 2891 /* 2892 * If another client has the file open, the only 2893 * delegation that can be issued is a Read delegation 2894 * and only if it is a Read open with Deny none. 2895 */ 2896 if (clp != stp->ls_clp) { 2897 if ((stp->ls_flags & NFSLCK_SHAREBITS) == 2898 NFSLCK_READACCESS) 2899 writedeleg = 0; 2900 else 2901 delegate = 0; 2902 } 2903 if(((new_stp->ls_flags & NFSLCK_ACCESSBITS) & 2904 ((stp->ls_flags>>NFSLCK_SHIFT) & NFSLCK_ACCESSBITS))|| 2905 ((stp->ls_flags & NFSLCK_ACCESSBITS) & 2906 ((new_stp->ls_flags>>NFSLCK_SHIFT)&NFSLCK_ACCESSBITS))){ 2907 ret = nfsrv_clientconflict(stp->ls_clp,&haslock,vp,p); 2908 if (ret == 1) { 2909 /* 2910 * nfsrv_clientconflict() unlocks state 2911 * when it returns non-zero. 2912 */ 2913 free(new_open, M_NFSDSTATE); 2914 free(new_deleg, M_NFSDSTATE); 2915 openstp = NULL; 2916 goto tryagain; 2917 } 2918 if (ret == 2) 2919 error = NFSERR_PERM; 2920 else if (new_stp->ls_flags & NFSLCK_RECLAIM) 2921 error = NFSERR_RECLAIMCONFLICT; 2922 else 2923 error = NFSERR_SHAREDENIED; 2924 if (ret == 0) 2925 NFSUNLOCKSTATE(); 2926 if (haslock) { 2927 NFSLOCKV4ROOTMUTEX(); 2928 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2929 NFSUNLOCKV4ROOTMUTEX(); 2930 } 2931 free(new_open, M_NFSDSTATE); 2932 free(new_deleg, M_NFSDSTATE); 2933 printf("nfsd openctrl unexpected client cnfl\n"); 2934 goto out; 2935 } 2936 } 2937 } 2938 2939 /* 2940 * Check for a conflicting delegation. If one is found, call 2941 * nfsrv_delegconflict() to handle it. If the v4root lock hasn't 2942 * been set yet, it will get the lock. Otherwise, it will recall 2943 * the delegation. Then, we try try again... 2944 * (If NFSLCK_DELEGCUR is set, it has a delegation, so there 2945 * isn't a conflict.) 2946 * I currently believe the conflict algorithm to be: 2947 * For Open with Read Access and Deny None 2948 * - there is a conflict iff a different client has a write delegation 2949 * For Open with other Write Access or any Deny except None 2950 * - there is a conflict if a different client has any delegation 2951 * - there is a conflict if the same client has a read delegation 2952 * (The current consensus is that this last case should be 2953 * considered a conflict since the client with a read delegation 2954 * could have done an Open with ReadAccess and WriteDeny 2955 * locally and then not have checked for the WriteDeny.) 2956 * The exception is a NFSv4.1/4.2 client that has requested 2957 * an atomic upgrade to a write delegation. 2958 */ 2959 if (!(new_stp->ls_flags & (NFSLCK_DELEGPREV | NFSLCK_DELEGCUR))) { 2960 stp = LIST_FIRST(&lfp->lf_deleg); 2961 while (stp != LIST_END(&lfp->lf_deleg)) { 2962 nstp = LIST_NEXT(stp, ls_file); 2963 if (stp->ls_clp != clp && (stp->ls_flags & NFSLCK_DELEGREAD)) 2964 writedeleg = 0; 2965 else if (stp->ls_clp != clp || 2966 (stp->ls_flags & NFSLCK_DELEGWRITE) != 0 || 2967 (new_stp->ls_flags & NFSLCK_WANTWDELEG) == 0) 2968 delegate = 0; 2969 if ((readonly && stp->ls_clp != clp && 2970 (stp->ls_flags & NFSLCK_DELEGWRITE) != 0) || 2971 (!readonly && (stp->ls_clp != clp || 2972 ((stp->ls_flags & NFSLCK_DELEGREAD) != 0 && 2973 (new_stp->ls_flags & NFSLCK_WANTWDELEG) == 0)))) { 2974 if (new_stp->ls_flags & NFSLCK_RECLAIM) { 2975 delegate = 2; 2976 } else { 2977 ret = nfsrv_delegconflict(stp, &haslock, p, vp); 2978 if (ret) { 2979 /* 2980 * nfsrv_delegconflict() unlocks state 2981 * when it returns non-zero. 2982 */ 2983 printf("Nfsd openctrl unexpected deleg cnfl\n"); 2984 free(new_open, M_NFSDSTATE); 2985 free(new_deleg, M_NFSDSTATE); 2986 if (ret == -1) { 2987 openstp = NULL; 2988 goto tryagain; 2989 } 2990 error = ret; 2991 goto out; 2992 } 2993 } 2994 } 2995 stp = nstp; 2996 } 2997 } 2998 2999 /* 3000 * We only get here if there was no open that conflicted. 3001 * If an open for the owner exists, or in the access/deny bits. 3002 * Otherwise it is a new open. If the open_owner hasn't been 3003 * confirmed, replace the open with the new one needing confirmation, 3004 * otherwise add the open. 3005 */ 3006 if (new_stp->ls_flags & NFSLCK_DELEGPREV) { 3007 /* 3008 * Handle NFSLCK_DELEGPREV by searching the old delegations for 3009 * a match. If found, just move the old delegation to the current 3010 * delegation list and issue open. If not found, return 3011 * NFSERR_EXPIRED. 3012 */ 3013 LIST_FOREACH(stp, &clp->lc_olddeleg, ls_list) { 3014 if (stp->ls_lfp == lfp) { 3015 /* Found it */ 3016 if (stp->ls_clp != clp) 3017 panic("olddeleg clp"); 3018 LIST_REMOVE(stp, ls_list); 3019 LIST_REMOVE(stp, ls_hash); 3020 stp->ls_flags &= ~NFSLCK_OLDDELEG; 3021 stp->ls_stateid.seqid = delegstateidp->seqid = 1; 3022 stp->ls_stateid.other[0] = delegstateidp->other[0] = 3023 clp->lc_clientid.lval[0]; 3024 stp->ls_stateid.other[1] = delegstateidp->other[1] = 3025 clp->lc_clientid.lval[1]; 3026 stp->ls_stateid.other[2] = delegstateidp->other[2] = 3027 nfsrv_nextstateindex(clp); 3028 stp->ls_compref = nd->nd_compref; 3029 LIST_INSERT_HEAD(&clp->lc_deleg, stp, ls_list); 3030 LIST_INSERT_HEAD(NFSSTATEHASH(clp, 3031 stp->ls_stateid), stp, ls_hash); 3032 if (stp->ls_flags & NFSLCK_DELEGWRITE) 3033 *rflagsp |= NFSV4OPEN_WRITEDELEGATE; 3034 else 3035 *rflagsp |= NFSV4OPEN_READDELEGATE; 3036 clp->lc_delegtime = NFSD_MONOSEC + 3037 nfsrv_lease + NFSRV_LEASEDELTA; 3038 3039 /* 3040 * Now, do the associated open. 3041 */ 3042 new_open->ls_stateid.seqid = 1; 3043 new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0]; 3044 new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1]; 3045 new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp); 3046 new_open->ls_flags = (new_stp->ls_flags&NFSLCK_DENYBITS)| 3047 NFSLCK_OPEN; 3048 if (stp->ls_flags & NFSLCK_DELEGWRITE) 3049 new_open->ls_flags |= (NFSLCK_READACCESS | 3050 NFSLCK_WRITEACCESS); 3051 else 3052 new_open->ls_flags |= NFSLCK_READACCESS; 3053 new_open->ls_uid = new_stp->ls_uid; 3054 new_open->ls_lfp = lfp; 3055 new_open->ls_clp = clp; 3056 LIST_INIT(&new_open->ls_open); 3057 LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file); 3058 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid), 3059 new_open, ls_hash); 3060 /* 3061 * and handle the open owner 3062 */ 3063 if (ownerstp) { 3064 new_open->ls_openowner = ownerstp; 3065 LIST_INSERT_HEAD(&ownerstp->ls_open,new_open,ls_list); 3066 } else { 3067 new_open->ls_openowner = new_stp; 3068 new_stp->ls_flags = 0; 3069 nfsrvd_refcache(new_stp->ls_op); 3070 new_stp->ls_noopens = 0; 3071 LIST_INIT(&new_stp->ls_open); 3072 LIST_INSERT_HEAD(&new_stp->ls_open, new_open, ls_list); 3073 LIST_INSERT_HEAD(&clp->lc_open, new_stp, ls_list); 3074 *new_stpp = NULL; 3075 NFSD_VNET(nfsstatsv1_p)->srvopenowners++; 3076 nfsrv_openpluslock++; 3077 } 3078 openstp = new_open; 3079 new_open = NULL; 3080 NFSD_VNET(nfsstatsv1_p)->srvopens++; 3081 nfsrv_openpluslock++; 3082 break; 3083 } 3084 } 3085 if (stp == LIST_END(&clp->lc_olddeleg)) 3086 error = NFSERR_EXPIRED; 3087 } else if (new_stp->ls_flags & (NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) { 3088 /* 3089 * Scan to see that no delegation for this client and file 3090 * doesn't already exist. 3091 * There also shouldn't yet be an Open for this file and 3092 * openowner. 3093 */ 3094 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) { 3095 if (stp->ls_clp == clp) 3096 break; 3097 } 3098 if (stp == LIST_END(&lfp->lf_deleg) && openstp == NULL) { 3099 /* 3100 * This is the Claim_Previous case with a delegation 3101 * type != Delegate_None. 3102 */ 3103 /* 3104 * First, add the delegation. (Although we must issue the 3105 * delegation, we can also ask for an immediate return.) 3106 */ 3107 new_deleg->ls_stateid.seqid = delegstateidp->seqid = 1; 3108 new_deleg->ls_stateid.other[0] = delegstateidp->other[0] = 3109 clp->lc_clientid.lval[0]; 3110 new_deleg->ls_stateid.other[1] = delegstateidp->other[1] = 3111 clp->lc_clientid.lval[1]; 3112 new_deleg->ls_stateid.other[2] = delegstateidp->other[2] = 3113 nfsrv_nextstateindex(clp); 3114 if (new_stp->ls_flags & NFSLCK_DELEGWRITE) { 3115 new_deleg->ls_flags = (NFSLCK_DELEGWRITE | 3116 NFSLCK_READACCESS | NFSLCK_WRITEACCESS); 3117 *rflagsp |= NFSV4OPEN_WRITEDELEGATE; 3118 nfsrv_writedelegcnt++; 3119 } else { 3120 new_deleg->ls_flags = (NFSLCK_DELEGREAD | 3121 NFSLCK_READACCESS); 3122 *rflagsp |= NFSV4OPEN_READDELEGATE; 3123 } 3124 new_deleg->ls_uid = new_stp->ls_uid; 3125 new_deleg->ls_lfp = lfp; 3126 new_deleg->ls_clp = clp; 3127 new_deleg->ls_filerev = filerev; 3128 new_deleg->ls_compref = nd->nd_compref; 3129 new_deleg->ls_lastrecall = 0; 3130 LIST_INSERT_HEAD(&lfp->lf_deleg, new_deleg, ls_file); 3131 LIST_INSERT_HEAD(NFSSTATEHASH(clp, 3132 new_deleg->ls_stateid), new_deleg, ls_hash); 3133 LIST_INSERT_HEAD(&clp->lc_deleg, new_deleg, ls_list); 3134 new_deleg = NULL; 3135 if (delegate == 2 || nfsrv_issuedelegs == 0 || 3136 (clp->lc_flags & (LCL_CALLBACKSON | LCL_CBDOWN)) != 3137 LCL_CALLBACKSON || 3138 NFSRV_V4DELEGLIMIT(nfsrv_delegatecnt) || 3139 !NFSVNO_DELEGOK(vp)) 3140 *rflagsp |= NFSV4OPEN_RECALL; 3141 NFSD_VNET(nfsstatsv1_p)->srvdelegates++; 3142 nfsrv_openpluslock++; 3143 nfsrv_delegatecnt++; 3144 3145 /* 3146 * Now, do the associated open. 3147 */ 3148 new_open->ls_stateid.seqid = 1; 3149 new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0]; 3150 new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1]; 3151 new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp); 3152 new_open->ls_flags = (new_stp->ls_flags & NFSLCK_DENYBITS) | 3153 NFSLCK_OPEN; 3154 if (new_stp->ls_flags & NFSLCK_DELEGWRITE) 3155 new_open->ls_flags |= (NFSLCK_READACCESS | 3156 NFSLCK_WRITEACCESS); 3157 else 3158 new_open->ls_flags |= NFSLCK_READACCESS; 3159 new_open->ls_uid = new_stp->ls_uid; 3160 new_open->ls_lfp = lfp; 3161 new_open->ls_clp = clp; 3162 LIST_INIT(&new_open->ls_open); 3163 LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file); 3164 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid), 3165 new_open, ls_hash); 3166 /* 3167 * and handle the open owner 3168 */ 3169 if (ownerstp) { 3170 new_open->ls_openowner = ownerstp; 3171 LIST_INSERT_HEAD(&ownerstp->ls_open, new_open, ls_list); 3172 } else { 3173 new_open->ls_openowner = new_stp; 3174 new_stp->ls_flags = 0; 3175 nfsrvd_refcache(new_stp->ls_op); 3176 new_stp->ls_noopens = 0; 3177 LIST_INIT(&new_stp->ls_open); 3178 LIST_INSERT_HEAD(&new_stp->ls_open, new_open, ls_list); 3179 LIST_INSERT_HEAD(&clp->lc_open, new_stp, ls_list); 3180 *new_stpp = NULL; 3181 NFSD_VNET(nfsstatsv1_p)->srvopenowners++; 3182 nfsrv_openpluslock++; 3183 } 3184 openstp = new_open; 3185 new_open = NULL; 3186 NFSD_VNET(nfsstatsv1_p)->srvopens++; 3187 nfsrv_openpluslock++; 3188 } else { 3189 error = NFSERR_RECLAIMCONFLICT; 3190 } 3191 } else if (ownerstp) { 3192 if (ownerstp->ls_flags & NFSLCK_NEEDSCONFIRM) { 3193 /* Replace the open */ 3194 if (ownerstp->ls_op) 3195 nfsrvd_derefcache(ownerstp->ls_op); 3196 ownerstp->ls_op = new_stp->ls_op; 3197 nfsrvd_refcache(ownerstp->ls_op); 3198 ownerstp->ls_seq = new_stp->ls_seq; 3199 *rflagsp |= NFSV4OPEN_RESULTCONFIRM; 3200 stp = LIST_FIRST(&ownerstp->ls_open); 3201 stp->ls_flags = (new_stp->ls_flags & NFSLCK_SHAREBITS) | 3202 NFSLCK_OPEN; 3203 stp->ls_stateid.seqid = 1; 3204 stp->ls_uid = new_stp->ls_uid; 3205 if (lfp != stp->ls_lfp) { 3206 LIST_REMOVE(stp, ls_file); 3207 LIST_INSERT_HEAD(&lfp->lf_open, stp, ls_file); 3208 stp->ls_lfp = lfp; 3209 } 3210 openstp = stp; 3211 } else if (openstp) { 3212 openstp->ls_flags |= (new_stp->ls_flags & NFSLCK_SHAREBITS); 3213 openstp->ls_stateid.seqid++; 3214 if ((nd->nd_flag & ND_NFSV41) != 0 && 3215 openstp->ls_stateid.seqid == 0) 3216 openstp->ls_stateid.seqid = 1; 3217 3218 /* 3219 * This is where we can choose to issue a delegation. 3220 */ 3221 nfsrv_issuedelegation(vp, clp, nd, delegate, writedeleg, 3222 readonly, filerev, NFSVNO_EXRDONLY(exp), &new_deleg, 3223 new_stp, lfp, rflagsp, delegstateidp); 3224 } else { 3225 new_open->ls_stateid.seqid = 1; 3226 new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0]; 3227 new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1]; 3228 new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp); 3229 new_open->ls_flags = (new_stp->ls_flags & NFSLCK_SHAREBITS)| 3230 NFSLCK_OPEN; 3231 new_open->ls_uid = new_stp->ls_uid; 3232 new_open->ls_openowner = ownerstp; 3233 new_open->ls_lfp = lfp; 3234 new_open->ls_clp = clp; 3235 LIST_INIT(&new_open->ls_open); 3236 LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file); 3237 LIST_INSERT_HEAD(&ownerstp->ls_open, new_open, ls_list); 3238 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid), 3239 new_open, ls_hash); 3240 openstp = new_open; 3241 new_open = NULL; 3242 NFSD_VNET(nfsstatsv1_p)->srvopens++; 3243 nfsrv_openpluslock++; 3244 3245 /* 3246 * This is where we can choose to issue a delegation. 3247 */ 3248 nfsrv_issuedelegation(vp, clp, nd, delegate, writedeleg, 3249 readonly, filerev, NFSVNO_EXRDONLY(exp), &new_deleg, 3250 new_stp, lfp, rflagsp, delegstateidp); 3251 } 3252 } else { 3253 /* 3254 * New owner case. Start the open_owner sequence with a 3255 * Needs confirmation (unless a reclaim) and hang the 3256 * new open off it. 3257 */ 3258 new_open->ls_stateid.seqid = 1; 3259 new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0]; 3260 new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1]; 3261 new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp); 3262 new_open->ls_flags = (new_stp->ls_flags & NFSLCK_SHAREBITS) | 3263 NFSLCK_OPEN; 3264 new_open->ls_uid = new_stp->ls_uid; 3265 LIST_INIT(&new_open->ls_open); 3266 new_open->ls_openowner = new_stp; 3267 new_open->ls_lfp = lfp; 3268 new_open->ls_clp = clp; 3269 LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file); 3270 if (new_stp->ls_flags & NFSLCK_RECLAIM) { 3271 new_stp->ls_flags = 0; 3272 } else if ((nd->nd_flag & ND_NFSV41) != 0) { 3273 /* 3274 * This is where we can choose to issue a delegation. 3275 */ 3276 nfsrv_issuedelegation(vp, clp, nd, delegate, writedeleg, 3277 readonly, filerev, NFSVNO_EXRDONLY(exp), &new_deleg, 3278 new_stp, lfp, rflagsp, delegstateidp); 3279 /* NFSv4.1 never needs confirmation. */ 3280 new_stp->ls_flags = 0; 3281 3282 /* 3283 * Since NFSv4.1 never does an OpenConfirm, the first 3284 * open state will be acquired here. 3285 */ 3286 if (!(clp->lc_flags & LCL_STAMPEDSTABLE)) { 3287 clp->lc_flags |= LCL_STAMPEDSTABLE; 3288 len = clp->lc_idlen; 3289 NFSBCOPY(clp->lc_id, clidp, len); 3290 gotstate = 1; 3291 } 3292 } else { 3293 *rflagsp |= NFSV4OPEN_RESULTCONFIRM; 3294 new_stp->ls_flags = NFSLCK_NEEDSCONFIRM; 3295 } 3296 nfsrvd_refcache(new_stp->ls_op); 3297 new_stp->ls_noopens = 0; 3298 LIST_INIT(&new_stp->ls_open); 3299 LIST_INSERT_HEAD(&new_stp->ls_open, new_open, ls_list); 3300 LIST_INSERT_HEAD(&clp->lc_open, new_stp, ls_list); 3301 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid), 3302 new_open, ls_hash); 3303 openstp = new_open; 3304 new_open = NULL; 3305 *new_stpp = NULL; 3306 NFSD_VNET(nfsstatsv1_p)->srvopens++; 3307 nfsrv_openpluslock++; 3308 NFSD_VNET(nfsstatsv1_p)->srvopenowners++; 3309 nfsrv_openpluslock++; 3310 } 3311 if (!error) { 3312 stateidp->seqid = openstp->ls_stateid.seqid; 3313 stateidp->other[0] = openstp->ls_stateid.other[0]; 3314 stateidp->other[1] = openstp->ls_stateid.other[1]; 3315 stateidp->other[2] = openstp->ls_stateid.other[2]; 3316 } 3317 NFSUNLOCKSTATE(); 3318 if (haslock) { 3319 NFSLOCKV4ROOTMUTEX(); 3320 nfsv4_unlock(&nfsv4rootfs_lock, 1); 3321 NFSUNLOCKV4ROOTMUTEX(); 3322 } 3323 if (new_open) 3324 free(new_open, M_NFSDSTATE); 3325 if (new_deleg) 3326 free(new_deleg, M_NFSDSTATE); 3327 3328 /* 3329 * If the NFSv4.1 client just acquired its first open, write a timestamp 3330 * to the stable storage file. 3331 */ 3332 if (gotstate != 0) { 3333 nfsrv_writestable(clidp, len, NFSNST_NEWSTATE, p); 3334 nfsrv_backupstable(); 3335 } 3336 3337 out: 3338 free(clidp, M_TEMP); 3339 NFSEXITCODE2(error, nd); 3340 return (error); 3341 } 3342 3343 /* 3344 * Open update. Does the confirm, downgrade and close. 3345 */ 3346 int 3347 nfsrv_openupdate(vnode_t vp, struct nfsstate *new_stp, nfsquad_t clientid, 3348 nfsv4stateid_t *stateidp, struct nfsrv_descript *nd, NFSPROC_T *p, 3349 int *retwriteaccessp) 3350 { 3351 struct nfsstate *stp; 3352 struct nfsclient *clp; 3353 struct nfslockfile *lfp; 3354 u_int32_t bits; 3355 int error = 0, gotstate = 0, len = 0; 3356 u_char *clidp = NULL; 3357 3358 /* 3359 * Check for restart conditions (client and server). 3360 */ 3361 error = nfsrv_checkrestart(clientid, new_stp->ls_flags, 3362 &new_stp->ls_stateid, 0); 3363 if (error) 3364 goto out; 3365 3366 clidp = malloc(NFSV4_OPAQUELIMIT, M_TEMP, M_WAITOK); 3367 NFSLOCKSTATE(); 3368 /* 3369 * Get the open structure via clientid and stateid. 3370 */ 3371 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 3372 (nfsquad_t)((u_quad_t)0), 0, nd, p); 3373 if (!error) 3374 error = nfsrv_getstate(clp, &new_stp->ls_stateid, 3375 new_stp->ls_flags, &stp); 3376 3377 /* 3378 * Sanity check the open. 3379 */ 3380 if (!error && (!(stp->ls_flags & NFSLCK_OPEN) || 3381 (!(new_stp->ls_flags & NFSLCK_CONFIRM) && 3382 (stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM)) || 3383 ((new_stp->ls_flags & NFSLCK_CONFIRM) && 3384 (!(stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM))))) 3385 error = NFSERR_BADSTATEID; 3386 3387 if (!error) 3388 error = nfsrv_checkseqid(nd, new_stp->ls_seq, 3389 stp->ls_openowner, new_stp->ls_op); 3390 if (!error && stp->ls_stateid.seqid != new_stp->ls_stateid.seqid && 3391 (((nd->nd_flag & ND_NFSV41) == 0 && 3392 !(new_stp->ls_flags & NFSLCK_CONFIRM)) || 3393 ((nd->nd_flag & ND_NFSV41) != 0 && 3394 new_stp->ls_stateid.seqid != 0))) 3395 error = NFSERR_OLDSTATEID; 3396 if (!error && vp->v_type != VREG) { 3397 if (vp->v_type == VDIR) 3398 error = NFSERR_ISDIR; 3399 else 3400 error = NFSERR_INVAL; 3401 } 3402 3403 if (error) { 3404 /* 3405 * If a client tries to confirm an Open with a bad 3406 * seqid# and there are no byte range locks or other Opens 3407 * on the openowner, just throw it away, so the next use of the 3408 * openowner will start a fresh seq#. 3409 */ 3410 if (error == NFSERR_BADSEQID && 3411 (new_stp->ls_flags & NFSLCK_CONFIRM) && 3412 nfsrv_nootherstate(stp)) 3413 nfsrv_freeopenowner(stp->ls_openowner, 0, p); 3414 NFSUNLOCKSTATE(); 3415 goto out; 3416 } 3417 3418 /* 3419 * Set the return stateid. 3420 */ 3421 stateidp->seqid = stp->ls_stateid.seqid + 1; 3422 if ((nd->nd_flag & ND_NFSV41) != 0 && stateidp->seqid == 0) 3423 stateidp->seqid = 1; 3424 stateidp->other[0] = stp->ls_stateid.other[0]; 3425 stateidp->other[1] = stp->ls_stateid.other[1]; 3426 stateidp->other[2] = stp->ls_stateid.other[2]; 3427 /* 3428 * Now, handle the three cases. 3429 */ 3430 if (new_stp->ls_flags & NFSLCK_CONFIRM) { 3431 /* 3432 * If the open doesn't need confirmation, it seems to me that 3433 * there is a client error, but I'll just log it and keep going? 3434 */ 3435 if (!(stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM)) 3436 printf("Nfsv4d: stray open confirm\n"); 3437 stp->ls_openowner->ls_flags = 0; 3438 stp->ls_stateid.seqid++; 3439 if ((nd->nd_flag & ND_NFSV41) != 0 && 3440 stp->ls_stateid.seqid == 0) 3441 stp->ls_stateid.seqid = 1; 3442 if (!(clp->lc_flags & LCL_STAMPEDSTABLE)) { 3443 clp->lc_flags |= LCL_STAMPEDSTABLE; 3444 len = clp->lc_idlen; 3445 NFSBCOPY(clp->lc_id, clidp, len); 3446 gotstate = 1; 3447 } 3448 NFSUNLOCKSTATE(); 3449 } else if (new_stp->ls_flags & NFSLCK_CLOSE) { 3450 lfp = stp->ls_lfp; 3451 if (retwriteaccessp != NULL) { 3452 if ((stp->ls_flags & NFSLCK_WRITEACCESS) != 0) 3453 *retwriteaccessp = 1; 3454 else 3455 *retwriteaccessp = 0; 3456 } 3457 if (nfsrv_dolocallocks != 0 && !LIST_EMPTY(&stp->ls_open)) { 3458 /* Get the lf lock */ 3459 nfsrv_locklf(lfp); 3460 NFSUNLOCKSTATE(); 3461 ASSERT_VOP_ELOCKED(vp, "nfsrv_openupdate"); 3462 NFSVOPUNLOCK(vp); 3463 if (nfsrv_freeopen(stp, vp, 1, p) == 0) { 3464 NFSLOCKSTATE(); 3465 nfsrv_unlocklf(lfp); 3466 NFSUNLOCKSTATE(); 3467 } 3468 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 3469 } else { 3470 (void) nfsrv_freeopen(stp, NULL, 0, p); 3471 NFSUNLOCKSTATE(); 3472 } 3473 } else { 3474 /* 3475 * Update the share bits, making sure that the new set are a 3476 * subset of the old ones. 3477 */ 3478 bits = (new_stp->ls_flags & NFSLCK_SHAREBITS); 3479 if (~(stp->ls_flags) & bits) { 3480 NFSUNLOCKSTATE(); 3481 error = NFSERR_INVAL; 3482 goto out; 3483 } 3484 stp->ls_flags = (bits | NFSLCK_OPEN); 3485 stp->ls_stateid.seqid++; 3486 if ((nd->nd_flag & ND_NFSV41) != 0 && 3487 stp->ls_stateid.seqid == 0) 3488 stp->ls_stateid.seqid = 1; 3489 NFSUNLOCKSTATE(); 3490 } 3491 3492 /* 3493 * If the client just confirmed its first open, write a timestamp 3494 * to the stable storage file. 3495 */ 3496 if (gotstate != 0) { 3497 nfsrv_writestable(clidp, len, NFSNST_NEWSTATE, p); 3498 nfsrv_backupstable(); 3499 } 3500 3501 out: 3502 free(clidp, M_TEMP); 3503 NFSEXITCODE2(error, nd); 3504 return (error); 3505 } 3506 3507 /* 3508 * Delegation update. Does the purge and return. 3509 */ 3510 int 3511 nfsrv_delegupdate(struct nfsrv_descript *nd, nfsquad_t clientid, 3512 nfsv4stateid_t *stateidp, vnode_t vp, int op, struct ucred *cred, 3513 NFSPROC_T *p, int *retwriteaccessp) 3514 { 3515 struct nfsstate *stp; 3516 struct nfsclient *clp; 3517 int error = 0; 3518 fhandle_t fh; 3519 3520 /* 3521 * Do a sanity check against the file handle for DelegReturn. 3522 */ 3523 if (vp) { 3524 error = nfsvno_getfh(vp, &fh, p); 3525 if (error) 3526 goto out; 3527 } 3528 /* 3529 * Check for restart conditions (client and server). 3530 */ 3531 if (op == NFSV4OP_DELEGRETURN) 3532 error = nfsrv_checkrestart(clientid, NFSLCK_DELEGRETURN, 3533 stateidp, 0); 3534 else 3535 error = nfsrv_checkrestart(clientid, NFSLCK_DELEGPURGE, 3536 stateidp, 0); 3537 3538 NFSLOCKSTATE(); 3539 /* 3540 * Get the open structure via clientid and stateid. 3541 */ 3542 if (!error) 3543 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 3544 (nfsquad_t)((u_quad_t)0), 0, nd, p); 3545 if (error) { 3546 if (error == NFSERR_CBPATHDOWN) 3547 error = 0; 3548 if (error == NFSERR_STALECLIENTID && op == NFSV4OP_DELEGRETURN) 3549 error = NFSERR_STALESTATEID; 3550 } 3551 if (!error && op == NFSV4OP_DELEGRETURN) { 3552 error = nfsrv_getstate(clp, stateidp, NFSLCK_DELEGRETURN, &stp); 3553 if (!error && stp->ls_stateid.seqid != stateidp->seqid && 3554 ((nd->nd_flag & ND_NFSV41) == 0 || stateidp->seqid != 0)) 3555 error = NFSERR_OLDSTATEID; 3556 } 3557 /* 3558 * NFSERR_EXPIRED means that the state has gone away, 3559 * so Delegations have been purged. Just return ok. 3560 */ 3561 if (error == NFSERR_EXPIRED && op == NFSV4OP_DELEGPURGE) { 3562 NFSUNLOCKSTATE(); 3563 error = 0; 3564 goto out; 3565 } 3566 if (error) { 3567 NFSUNLOCKSTATE(); 3568 goto out; 3569 } 3570 3571 if (op == NFSV4OP_DELEGRETURN) { 3572 if (NFSBCMP((caddr_t)&fh, (caddr_t)&stp->ls_lfp->lf_fh, 3573 sizeof (fhandle_t))) { 3574 NFSUNLOCKSTATE(); 3575 error = NFSERR_BADSTATEID; 3576 goto out; 3577 } 3578 if (retwriteaccessp != NULL) { 3579 if ((stp->ls_flags & NFSLCK_DELEGWRITE) != 0) 3580 *retwriteaccessp = 1; 3581 else 3582 *retwriteaccessp = 0; 3583 } 3584 nfsrv_freedeleg(stp); 3585 } else { 3586 nfsrv_freedeleglist(&clp->lc_olddeleg); 3587 } 3588 NFSUNLOCKSTATE(); 3589 error = 0; 3590 3591 out: 3592 NFSEXITCODE(error); 3593 return (error); 3594 } 3595 3596 /* 3597 * Release lock owner. 3598 */ 3599 int 3600 nfsrv_releaselckown(struct nfsstate *new_stp, nfsquad_t clientid, 3601 NFSPROC_T *p) 3602 { 3603 struct nfsstate *stp, *nstp, *openstp, *ownstp; 3604 struct nfsclient *clp; 3605 int error = 0; 3606 3607 /* 3608 * Check for restart conditions (client and server). 3609 */ 3610 error = nfsrv_checkrestart(clientid, new_stp->ls_flags, 3611 &new_stp->ls_stateid, 0); 3612 if (error) 3613 goto out; 3614 3615 NFSLOCKSTATE(); 3616 /* 3617 * Get the lock owner by name. 3618 */ 3619 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 3620 (nfsquad_t)((u_quad_t)0), 0, NULL, p); 3621 if (error) { 3622 NFSUNLOCKSTATE(); 3623 goto out; 3624 } 3625 LIST_FOREACH(ownstp, &clp->lc_open, ls_list) { 3626 LIST_FOREACH(openstp, &ownstp->ls_open, ls_list) { 3627 stp = LIST_FIRST(&openstp->ls_open); 3628 while (stp != LIST_END(&openstp->ls_open)) { 3629 nstp = LIST_NEXT(stp, ls_list); 3630 /* 3631 * If the owner matches, check for locks and 3632 * then free or return an error. 3633 */ 3634 if (stp->ls_ownerlen == new_stp->ls_ownerlen && 3635 !NFSBCMP(stp->ls_owner, new_stp->ls_owner, 3636 stp->ls_ownerlen)){ 3637 if (LIST_EMPTY(&stp->ls_lock)) { 3638 nfsrv_freelockowner(stp, NULL, 0, p); 3639 } else { 3640 NFSUNLOCKSTATE(); 3641 error = NFSERR_LOCKSHELD; 3642 goto out; 3643 } 3644 } 3645 stp = nstp; 3646 } 3647 } 3648 } 3649 NFSUNLOCKSTATE(); 3650 3651 out: 3652 NFSEXITCODE(error); 3653 return (error); 3654 } 3655 3656 /* 3657 * Get the file handle for a lock structure. 3658 */ 3659 static int 3660 nfsrv_getlockfh(vnode_t vp, u_short flags, struct nfslockfile *new_lfp, 3661 fhandle_t *nfhp, NFSPROC_T *p) 3662 { 3663 fhandle_t *fhp = NULL; 3664 int error; 3665 3666 /* 3667 * For lock, use the new nfslock structure, otherwise just 3668 * a fhandle_t on the stack. 3669 */ 3670 if (flags & NFSLCK_OPEN) { 3671 KASSERT(new_lfp != NULL, ("nfsrv_getlockfh: new_lfp NULL")); 3672 fhp = &new_lfp->lf_fh; 3673 } else if (nfhp) { 3674 fhp = nfhp; 3675 } else { 3676 panic("nfsrv_getlockfh"); 3677 } 3678 error = nfsvno_getfh(vp, fhp, p); 3679 NFSEXITCODE(error); 3680 return (error); 3681 } 3682 3683 /* 3684 * Get an nfs lock structure. Allocate one, as required, and return a 3685 * pointer to it. 3686 * Returns an NFSERR_xxx upon failure or -1 to indicate no current lock. 3687 */ 3688 static int 3689 nfsrv_getlockfile(u_short flags, struct nfslockfile **new_lfpp, 3690 struct nfslockfile **lfpp, fhandle_t *nfhp, int lockit) 3691 { 3692 struct nfslockfile *lfp; 3693 fhandle_t *fhp = NULL, *tfhp; 3694 struct nfslockhashhead *hp; 3695 struct nfslockfile *new_lfp = NULL; 3696 3697 /* 3698 * For lock, use the new nfslock structure, otherwise just 3699 * a fhandle_t on the stack. 3700 */ 3701 if (flags & NFSLCK_OPEN) { 3702 new_lfp = *new_lfpp; 3703 fhp = &new_lfp->lf_fh; 3704 } else if (nfhp) { 3705 fhp = nfhp; 3706 } else { 3707 panic("nfsrv_getlockfile"); 3708 } 3709 3710 hp = NFSLOCKHASH(fhp); 3711 LIST_FOREACH(lfp, hp, lf_hash) { 3712 tfhp = &lfp->lf_fh; 3713 if (NFSVNO_CMPFH(fhp, tfhp)) { 3714 if (lockit) 3715 nfsrv_locklf(lfp); 3716 *lfpp = lfp; 3717 return (0); 3718 } 3719 } 3720 if (!(flags & NFSLCK_OPEN)) 3721 return (-1); 3722 3723 /* 3724 * No match, so chain the new one into the list. 3725 */ 3726 LIST_INIT(&new_lfp->lf_open); 3727 LIST_INIT(&new_lfp->lf_lock); 3728 LIST_INIT(&new_lfp->lf_deleg); 3729 LIST_INIT(&new_lfp->lf_locallock); 3730 LIST_INIT(&new_lfp->lf_rollback); 3731 new_lfp->lf_locallock_lck.nfslock_usecnt = 0; 3732 new_lfp->lf_locallock_lck.nfslock_lock = 0; 3733 new_lfp->lf_usecount = 0; 3734 LIST_INSERT_HEAD(hp, new_lfp, lf_hash); 3735 *lfpp = new_lfp; 3736 *new_lfpp = NULL; 3737 return (0); 3738 } 3739 3740 /* 3741 * This function adds a nfslock lock structure to the list for the associated 3742 * nfsstate and nfslockfile structures. It will be inserted after the 3743 * entry pointed at by insert_lop. 3744 */ 3745 static void 3746 nfsrv_insertlock(struct nfslock *new_lop, struct nfslock *insert_lop, 3747 struct nfsstate *stp, struct nfslockfile *lfp) 3748 { 3749 struct nfslock *lop, *nlop; 3750 3751 new_lop->lo_stp = stp; 3752 new_lop->lo_lfp = lfp; 3753 3754 if (stp != NULL) { 3755 /* Insert in increasing lo_first order */ 3756 lop = LIST_FIRST(&lfp->lf_lock); 3757 if (lop == LIST_END(&lfp->lf_lock) || 3758 new_lop->lo_first <= lop->lo_first) { 3759 LIST_INSERT_HEAD(&lfp->lf_lock, new_lop, lo_lckfile); 3760 } else { 3761 nlop = LIST_NEXT(lop, lo_lckfile); 3762 while (nlop != LIST_END(&lfp->lf_lock) && 3763 nlop->lo_first < new_lop->lo_first) { 3764 lop = nlop; 3765 nlop = LIST_NEXT(lop, lo_lckfile); 3766 } 3767 LIST_INSERT_AFTER(lop, new_lop, lo_lckfile); 3768 } 3769 } else { 3770 new_lop->lo_lckfile.le_prev = NULL; /* list not used */ 3771 } 3772 3773 /* 3774 * Insert after insert_lop, which is overloaded as stp or lfp for 3775 * an empty list. 3776 */ 3777 if (stp == NULL && (struct nfslockfile *)insert_lop == lfp) 3778 LIST_INSERT_HEAD(&lfp->lf_locallock, new_lop, lo_lckowner); 3779 else if ((struct nfsstate *)insert_lop == stp) 3780 LIST_INSERT_HEAD(&stp->ls_lock, new_lop, lo_lckowner); 3781 else 3782 LIST_INSERT_AFTER(insert_lop, new_lop, lo_lckowner); 3783 if (stp != NULL) { 3784 NFSD_VNET(nfsstatsv1_p)->srvlocks++; 3785 nfsrv_openpluslock++; 3786 } 3787 } 3788 3789 /* 3790 * This function updates the locking for a lock owner and given file. It 3791 * maintains a list of lock ranges ordered on increasing file offset that 3792 * are NFSLCK_READ or NFSLCK_WRITE and non-overlapping (aka POSIX style). 3793 * It always adds new_lop to the list and sometimes uses the one pointed 3794 * at by other_lopp. 3795 */ 3796 static void 3797 nfsrv_updatelock(struct nfsstate *stp, struct nfslock **new_lopp, 3798 struct nfslock **other_lopp, struct nfslockfile *lfp) 3799 { 3800 struct nfslock *new_lop = *new_lopp; 3801 struct nfslock *lop, *tlop, *ilop; 3802 struct nfslock *other_lop = *other_lopp; 3803 int unlock = 0, myfile = 0; 3804 u_int64_t tmp; 3805 3806 /* 3807 * Work down the list until the lock is merged. 3808 */ 3809 if (new_lop->lo_flags & NFSLCK_UNLOCK) 3810 unlock = 1; 3811 if (stp != NULL) { 3812 ilop = (struct nfslock *)stp; 3813 lop = LIST_FIRST(&stp->ls_lock); 3814 } else { 3815 ilop = (struct nfslock *)lfp; 3816 lop = LIST_FIRST(&lfp->lf_locallock); 3817 } 3818 while (lop != NULL) { 3819 /* 3820 * Only check locks for this file that aren't before the start of 3821 * new lock's range. 3822 */ 3823 if (lop->lo_lfp == lfp) { 3824 myfile = 1; 3825 if (lop->lo_end >= new_lop->lo_first) { 3826 if (new_lop->lo_end < lop->lo_first) { 3827 /* 3828 * If the new lock ends before the start of the 3829 * current lock's range, no merge, just insert 3830 * the new lock. 3831 */ 3832 break; 3833 } 3834 if (new_lop->lo_flags == lop->lo_flags || 3835 (new_lop->lo_first <= lop->lo_first && 3836 new_lop->lo_end >= lop->lo_end)) { 3837 /* 3838 * This lock can be absorbed by the new lock/unlock. 3839 * This happens when it covers the entire range 3840 * of the old lock or is contiguous 3841 * with the old lock and is of the same type or an 3842 * unlock. 3843 */ 3844 if (lop->lo_first < new_lop->lo_first) 3845 new_lop->lo_first = lop->lo_first; 3846 if (lop->lo_end > new_lop->lo_end) 3847 new_lop->lo_end = lop->lo_end; 3848 tlop = lop; 3849 lop = LIST_NEXT(lop, lo_lckowner); 3850 nfsrv_freenfslock(tlop); 3851 continue; 3852 } 3853 3854 /* 3855 * All these cases are for contiguous locks that are not the 3856 * same type, so they can't be merged. 3857 */ 3858 if (new_lop->lo_first <= lop->lo_first) { 3859 /* 3860 * This case is where the new lock overlaps with the 3861 * first part of the old lock. Move the start of the 3862 * old lock to just past the end of the new lock. The 3863 * new lock will be inserted in front of the old, since 3864 * ilop hasn't been updated. (We are done now.) 3865 */ 3866 lop->lo_first = new_lop->lo_end; 3867 break; 3868 } 3869 if (new_lop->lo_end >= lop->lo_end) { 3870 /* 3871 * This case is where the new lock overlaps with the 3872 * end of the old lock's range. Move the old lock's 3873 * end to just before the new lock's first and insert 3874 * the new lock after the old lock. 3875 * Might not be done yet, since the new lock could 3876 * overlap further locks with higher ranges. 3877 */ 3878 lop->lo_end = new_lop->lo_first; 3879 ilop = lop; 3880 lop = LIST_NEXT(lop, lo_lckowner); 3881 continue; 3882 } 3883 /* 3884 * The final case is where the new lock's range is in the 3885 * middle of the current lock's and splits the current lock 3886 * up. Use *other_lopp to handle the second part of the 3887 * split old lock range. (We are done now.) 3888 * For unlock, we use new_lop as other_lop and tmp, since 3889 * other_lop and new_lop are the same for this case. 3890 * We noted the unlock case above, so we don't need 3891 * new_lop->lo_flags any longer. 3892 */ 3893 tmp = new_lop->lo_first; 3894 if (other_lop == NULL) { 3895 if (!unlock) 3896 panic("nfsd srv update unlock"); 3897 other_lop = new_lop; 3898 *new_lopp = NULL; 3899 } 3900 other_lop->lo_first = new_lop->lo_end; 3901 other_lop->lo_end = lop->lo_end; 3902 other_lop->lo_flags = lop->lo_flags; 3903 other_lop->lo_stp = stp; 3904 other_lop->lo_lfp = lfp; 3905 lop->lo_end = tmp; 3906 nfsrv_insertlock(other_lop, lop, stp, lfp); 3907 *other_lopp = NULL; 3908 ilop = lop; 3909 break; 3910 } 3911 } 3912 ilop = lop; 3913 lop = LIST_NEXT(lop, lo_lckowner); 3914 if (myfile && (lop == NULL || lop->lo_lfp != lfp)) 3915 break; 3916 } 3917 3918 /* 3919 * Insert the new lock in the list at the appropriate place. 3920 */ 3921 if (!unlock) { 3922 nfsrv_insertlock(new_lop, ilop, stp, lfp); 3923 *new_lopp = NULL; 3924 } 3925 } 3926 3927 /* 3928 * This function handles sequencing of locks, etc. 3929 * It returns an error that indicates what the caller should do. 3930 */ 3931 static int 3932 nfsrv_checkseqid(struct nfsrv_descript *nd, u_int32_t seqid, 3933 struct nfsstate *stp, struct nfsrvcache *op) 3934 { 3935 int error = 0; 3936 3937 if ((nd->nd_flag & ND_NFSV41) != 0) 3938 /* NFSv4.1 ignores the open_seqid and lock_seqid. */ 3939 goto out; 3940 if (op != nd->nd_rp) 3941 panic("nfsrvstate checkseqid"); 3942 if (!(op->rc_flag & RC_INPROG)) 3943 panic("nfsrvstate not inprog"); 3944 if (stp->ls_op && stp->ls_op->rc_refcnt <= 0) { 3945 printf("refcnt=%d\n", stp->ls_op->rc_refcnt); 3946 panic("nfsrvstate op refcnt"); 3947 } 3948 3949 /* If ND_ERELOOKUP is set, the seqid has already been handled. */ 3950 if ((nd->nd_flag & ND_ERELOOKUP) != 0) 3951 goto out; 3952 3953 if ((stp->ls_seq + 1) == seqid) { 3954 if (stp->ls_op) 3955 nfsrvd_derefcache(stp->ls_op); 3956 stp->ls_op = op; 3957 nfsrvd_refcache(op); 3958 stp->ls_seq = seqid; 3959 goto out; 3960 } else if (stp->ls_seq == seqid && stp->ls_op && 3961 op->rc_xid == stp->ls_op->rc_xid && 3962 op->rc_refcnt == 0 && 3963 op->rc_reqlen == stp->ls_op->rc_reqlen && 3964 op->rc_cksum == stp->ls_op->rc_cksum) { 3965 if (stp->ls_op->rc_flag & RC_INPROG) { 3966 error = NFSERR_DONTREPLY; 3967 goto out; 3968 } 3969 nd->nd_rp = stp->ls_op; 3970 nd->nd_rp->rc_flag |= RC_INPROG; 3971 nfsrvd_delcache(op); 3972 error = NFSERR_REPLYFROMCACHE; 3973 goto out; 3974 } 3975 error = NFSERR_BADSEQID; 3976 3977 out: 3978 NFSEXITCODE2(error, nd); 3979 return (error); 3980 } 3981 3982 /* 3983 * Get the client ip address for callbacks. If the strings can't be parsed, 3984 * just set lc_program to 0 to indicate no callbacks are possible. 3985 * (For cases where the address can't be parsed or is 0.0.0.0.0.0, set 3986 * the address to the client's transport address. This won't be used 3987 * for callbacks, but can be printed out by nfsstats for info.) 3988 * Return error if the xdr can't be parsed, 0 otherwise. 3989 */ 3990 int 3991 nfsrv_getclientipaddr(struct nfsrv_descript *nd, struct nfsclient *clp) 3992 { 3993 u_int32_t *tl; 3994 u_char *cp, *cp2; 3995 int i, j, maxalen = 0, minalen = 0; 3996 sa_family_t af; 3997 #ifdef INET 3998 struct sockaddr_in *rin = NULL, *sin; 3999 #endif 4000 #ifdef INET6 4001 struct sockaddr_in6 *rin6 = NULL, *sin6; 4002 #endif 4003 u_char *addr; 4004 int error = 0, cantparse = 0; 4005 union { 4006 in_addr_t ival; 4007 u_char cval[4]; 4008 } ip; 4009 union { 4010 in_port_t sval; 4011 u_char cval[2]; 4012 } port; 4013 4014 /* 8 is the maximum length of the port# string. */ 4015 addr = malloc(INET6_ADDRSTRLEN + 8, M_TEMP, M_WAITOK); 4016 clp->lc_req.nr_client = NULL; 4017 clp->lc_req.nr_lock = 0; 4018 af = AF_UNSPEC; 4019 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 4020 i = fxdr_unsigned(int, *tl); 4021 if (i >= 3 && i <= 4) { 4022 error = nfsrv_mtostr(nd, addr, i); 4023 if (error) 4024 goto nfsmout; 4025 #ifdef INET 4026 if (!strcmp(addr, "tcp")) { 4027 clp->lc_flags |= LCL_TCPCALLBACK; 4028 clp->lc_req.nr_sotype = SOCK_STREAM; 4029 clp->lc_req.nr_soproto = IPPROTO_TCP; 4030 af = AF_INET; 4031 } else if (!strcmp(addr, "udp")) { 4032 clp->lc_req.nr_sotype = SOCK_DGRAM; 4033 clp->lc_req.nr_soproto = IPPROTO_UDP; 4034 af = AF_INET; 4035 } 4036 #endif 4037 #ifdef INET6 4038 if (af == AF_UNSPEC) { 4039 if (!strcmp(addr, "tcp6")) { 4040 clp->lc_flags |= LCL_TCPCALLBACK; 4041 clp->lc_req.nr_sotype = SOCK_STREAM; 4042 clp->lc_req.nr_soproto = IPPROTO_TCP; 4043 af = AF_INET6; 4044 } else if (!strcmp(addr, "udp6")) { 4045 clp->lc_req.nr_sotype = SOCK_DGRAM; 4046 clp->lc_req.nr_soproto = IPPROTO_UDP; 4047 af = AF_INET6; 4048 } 4049 } 4050 #endif 4051 if (af == AF_UNSPEC) { 4052 cantparse = 1; 4053 } 4054 } else { 4055 cantparse = 1; 4056 if (i > 0) { 4057 error = nfsm_advance(nd, NFSM_RNDUP(i), -1); 4058 if (error) 4059 goto nfsmout; 4060 } 4061 } 4062 /* 4063 * The caller has allocated clp->lc_req.nr_nam to be large enough 4064 * for either AF_INET or AF_INET6 and zeroed out the contents. 4065 * maxalen is set to the maximum length of the host IP address string 4066 * plus 8 for the maximum length of the port#. 4067 * minalen is set to the minimum length of the host IP address string 4068 * plus 4 for the minimum length of the port#. 4069 * These lengths do not include NULL termination, 4070 * so INET[6]_ADDRSTRLEN - 1 is used in the calculations. 4071 */ 4072 switch (af) { 4073 #ifdef INET 4074 case AF_INET: 4075 rin = (struct sockaddr_in *)clp->lc_req.nr_nam; 4076 rin->sin_family = AF_INET; 4077 rin->sin_len = sizeof(struct sockaddr_in); 4078 maxalen = INET_ADDRSTRLEN - 1 + 8; 4079 minalen = 7 + 4; 4080 break; 4081 #endif 4082 #ifdef INET6 4083 case AF_INET6: 4084 rin6 = (struct sockaddr_in6 *)clp->lc_req.nr_nam; 4085 rin6->sin6_family = AF_INET6; 4086 rin6->sin6_len = sizeof(struct sockaddr_in6); 4087 maxalen = INET6_ADDRSTRLEN - 1 + 8; 4088 minalen = 3 + 4; 4089 break; 4090 #endif 4091 } 4092 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 4093 i = fxdr_unsigned(int, *tl); 4094 if (i < 0) { 4095 error = NFSERR_BADXDR; 4096 goto nfsmout; 4097 } else if (i == 0) { 4098 cantparse = 1; 4099 } else if (!cantparse && i <= maxalen && i >= minalen) { 4100 error = nfsrv_mtostr(nd, addr, i); 4101 if (error) 4102 goto nfsmout; 4103 4104 /* 4105 * Parse out the address fields. We expect 6 decimal numbers 4106 * separated by '.'s for AF_INET and two decimal numbers 4107 * preceeded by '.'s for AF_INET6. 4108 */ 4109 cp = NULL; 4110 switch (af) { 4111 #ifdef INET6 4112 /* 4113 * For AF_INET6, first parse the host address. 4114 */ 4115 case AF_INET6: 4116 cp = strchr(addr, '.'); 4117 if (cp != NULL) { 4118 *cp++ = '\0'; 4119 if (inet_pton(af, addr, &rin6->sin6_addr) == 1) 4120 i = 4; 4121 else { 4122 cp = NULL; 4123 cantparse = 1; 4124 } 4125 } 4126 break; 4127 #endif 4128 #ifdef INET 4129 case AF_INET: 4130 cp = addr; 4131 i = 0; 4132 break; 4133 #endif 4134 } 4135 while (cp != NULL && *cp && i < 6) { 4136 cp2 = cp; 4137 while (*cp2 && *cp2 != '.') 4138 cp2++; 4139 if (*cp2) 4140 *cp2++ = '\0'; 4141 else if (i != 5) { 4142 cantparse = 1; 4143 break; 4144 } 4145 j = nfsrv_getipnumber(cp); 4146 if (j >= 0) { 4147 if (i < 4) 4148 ip.cval[3 - i] = j; 4149 else 4150 port.cval[5 - i] = j; 4151 } else { 4152 cantparse = 1; 4153 break; 4154 } 4155 cp = cp2; 4156 i++; 4157 } 4158 if (!cantparse) { 4159 /* 4160 * The host address INADDR_ANY is (mis)used to indicate 4161 * "there is no valid callback address". 4162 */ 4163 switch (af) { 4164 #ifdef INET6 4165 case AF_INET6: 4166 if (!IN6_ARE_ADDR_EQUAL(&rin6->sin6_addr, 4167 &in6addr_any)) 4168 rin6->sin6_port = htons(port.sval); 4169 else 4170 cantparse = 1; 4171 break; 4172 #endif 4173 #ifdef INET 4174 case AF_INET: 4175 if (ip.ival != INADDR_ANY) { 4176 rin->sin_addr.s_addr = htonl(ip.ival); 4177 rin->sin_port = htons(port.sval); 4178 } else { 4179 cantparse = 1; 4180 } 4181 break; 4182 #endif 4183 } 4184 } 4185 } else { 4186 cantparse = 1; 4187 if (i > 0) { 4188 error = nfsm_advance(nd, NFSM_RNDUP(i), -1); 4189 if (error) 4190 goto nfsmout; 4191 } 4192 } 4193 if (cantparse) { 4194 switch (nd->nd_nam->sa_family) { 4195 #ifdef INET 4196 case AF_INET: 4197 sin = (struct sockaddr_in *)nd->nd_nam; 4198 rin = (struct sockaddr_in *)clp->lc_req.nr_nam; 4199 rin->sin_family = AF_INET; 4200 rin->sin_len = sizeof(struct sockaddr_in); 4201 rin->sin_addr.s_addr = sin->sin_addr.s_addr; 4202 rin->sin_port = 0x0; 4203 break; 4204 #endif 4205 #ifdef INET6 4206 case AF_INET6: 4207 sin6 = (struct sockaddr_in6 *)nd->nd_nam; 4208 rin6 = (struct sockaddr_in6 *)clp->lc_req.nr_nam; 4209 rin6->sin6_family = AF_INET6; 4210 rin6->sin6_len = sizeof(struct sockaddr_in6); 4211 rin6->sin6_addr = sin6->sin6_addr; 4212 rin6->sin6_port = 0x0; 4213 break; 4214 #endif 4215 } 4216 clp->lc_program = 0; 4217 } 4218 nfsmout: 4219 free(addr, M_TEMP); 4220 NFSEXITCODE2(error, nd); 4221 return (error); 4222 } 4223 4224 /* 4225 * Turn a string of up to three decimal digits into a number. Return -1 upon 4226 * error. 4227 */ 4228 static int 4229 nfsrv_getipnumber(u_char *cp) 4230 { 4231 int i = 0, j = 0; 4232 4233 while (*cp) { 4234 if (j > 2 || *cp < '0' || *cp > '9') 4235 return (-1); 4236 i *= 10; 4237 i += (*cp - '0'); 4238 cp++; 4239 j++; 4240 } 4241 if (i < 256) 4242 return (i); 4243 return (-1); 4244 } 4245 4246 /* 4247 * This function checks for restart conditions. 4248 */ 4249 static int 4250 nfsrv_checkrestart(nfsquad_t clientid, u_int32_t flags, 4251 nfsv4stateid_t *stateidp, int specialid) 4252 { 4253 int ret = 0; 4254 4255 /* 4256 * First check for a server restart. Open, LockT, ReleaseLockOwner 4257 * and DelegPurge have a clientid, the rest a stateid. 4258 */ 4259 if (flags & 4260 (NFSLCK_OPEN | NFSLCK_TEST | NFSLCK_RELEASE | NFSLCK_DELEGPURGE)) { 4261 if (clientid.lval[0] != NFSD_VNET(nfsrvboottime)) { 4262 ret = NFSERR_STALECLIENTID; 4263 goto out; 4264 } 4265 } else if (stateidp->other[0] != NFSD_VNET(nfsrvboottime) && 4266 specialid == 0) { 4267 ret = NFSERR_STALESTATEID; 4268 goto out; 4269 } 4270 4271 /* 4272 * Read, Write, Setattr and LockT can return NFSERR_GRACE and do 4273 * not use a lock/open owner seqid#, so the check can be done now. 4274 * (The others will be checked, as required, later.) 4275 */ 4276 if (!(flags & (NFSLCK_CHECK | NFSLCK_TEST))) 4277 goto out; 4278 4279 NFSLOCKSTATE(); 4280 ret = nfsrv_checkgrace(NULL, NULL, flags); 4281 NFSUNLOCKSTATE(); 4282 4283 out: 4284 NFSEXITCODE(ret); 4285 return (ret); 4286 } 4287 4288 /* 4289 * Check for grace. 4290 */ 4291 static int 4292 nfsrv_checkgrace(struct nfsrv_descript *nd, struct nfsclient *clp, 4293 u_int32_t flags) 4294 { 4295 int error = 0, notreclaimed; 4296 struct nfsrv_stable *sp; 4297 4298 if ((NFSD_VNET(nfsrv_stablefirst).nsf_flags & (NFSNSF_UPDATEDONE | 4299 NFSNSF_GRACEOVER)) == 0) { 4300 /* 4301 * First, check to see if all of the clients have done a 4302 * ReclaimComplete. If so, grace can end now. 4303 */ 4304 notreclaimed = 0; 4305 LIST_FOREACH(sp, &NFSD_VNET(nfsrv_stablefirst).nsf_head, 4306 nst_list) { 4307 if ((sp->nst_flag & NFSNST_RECLAIMED) == 0) { 4308 notreclaimed = 1; 4309 break; 4310 } 4311 } 4312 if (notreclaimed == 0) 4313 NFSD_VNET(nfsrv_stablefirst).nsf_flags |= 4314 (NFSNSF_GRACEOVER | NFSNSF_NEEDLOCK); 4315 } 4316 4317 if ((NFSD_VNET(nfsrv_stablefirst).nsf_flags & NFSNSF_GRACEOVER) != 0) { 4318 if (flags & NFSLCK_RECLAIM) { 4319 error = NFSERR_NOGRACE; 4320 goto out; 4321 } 4322 } else { 4323 if (!(flags & NFSLCK_RECLAIM)) { 4324 error = NFSERR_GRACE; 4325 goto out; 4326 } 4327 if (nd != NULL && clp != NULL && 4328 (nd->nd_flag & ND_NFSV41) != 0 && 4329 (clp->lc_flags & LCL_RECLAIMCOMPLETE) != 0) { 4330 error = NFSERR_NOGRACE; 4331 goto out; 4332 } 4333 4334 /* 4335 * If grace is almost over and we are still getting Reclaims, 4336 * extend grace a bit. 4337 */ 4338 if ((NFSD_MONOSEC + NFSRV_LEASEDELTA) > 4339 NFSD_VNET(nfsrv_stablefirst).nsf_eograce) 4340 NFSD_VNET(nfsrv_stablefirst).nsf_eograce = 4341 NFSD_MONOSEC + NFSRV_LEASEDELTA; 4342 } 4343 4344 out: 4345 NFSEXITCODE(error); 4346 return (error); 4347 } 4348 4349 /* 4350 * Do a server callback. 4351 * The "trunc" argument is slightly overloaded and refers to different 4352 * boolean arguments for CBRECALL and CBLAYOUTRECALL. 4353 */ 4354 static int 4355 nfsrv_docallback(struct nfsclient *clp, int procnum, nfsv4stateid_t *stateidp, 4356 int trunc, fhandle_t *fhp, struct nfsvattr *nap, nfsattrbit_t *attrbitp, 4357 int laytype, NFSPROC_T *p) 4358 { 4359 struct mbuf *m; 4360 u_int32_t *tl; 4361 struct nfsrv_descript *nd; 4362 struct ucred *cred; 4363 int error = 0, slotpos; 4364 u_int32_t callback; 4365 struct nfsdsession *sep = NULL; 4366 uint64_t tval; 4367 bool dotls; 4368 4369 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 4370 cred = newnfs_getcred(); 4371 NFSLOCKSTATE(); /* mostly for lc_cbref++ */ 4372 if (clp->lc_flags & LCL_NEEDSCONFIRM) { 4373 NFSUNLOCKSTATE(); 4374 panic("docallb"); 4375 } 4376 clp->lc_cbref++; 4377 4378 /* 4379 * Fill the callback program# and version into the request 4380 * structure for newnfs_connect() to use. 4381 */ 4382 clp->lc_req.nr_prog = clp->lc_program; 4383 #ifdef notnow 4384 if ((clp->lc_flags & LCL_NFSV41) != 0) 4385 clp->lc_req.nr_vers = NFSV41_CBVERS; 4386 else 4387 #endif 4388 clp->lc_req.nr_vers = NFSV4_CBVERS; 4389 4390 /* 4391 * First, fill in some of the fields of nd and cr. 4392 */ 4393 nd->nd_flag = ND_NFSV4; 4394 if (clp->lc_flags & LCL_GSS) 4395 nd->nd_flag |= ND_KERBV; 4396 if ((clp->lc_flags & LCL_NFSV41) != 0) 4397 nd->nd_flag |= ND_NFSV41; 4398 if ((clp->lc_flags & LCL_NFSV42) != 0) 4399 nd->nd_flag |= ND_NFSV42; 4400 nd->nd_repstat = 0; 4401 cred->cr_uid = clp->lc_uid; 4402 cred->cr_gid = clp->lc_gid; 4403 callback = clp->lc_callback; 4404 NFSUNLOCKSTATE(); 4405 cred->cr_ngroups = 1; 4406 4407 /* 4408 * Get the first mbuf for the request. 4409 */ 4410 MGET(m, M_WAITOK, MT_DATA); 4411 m->m_len = 0; 4412 nd->nd_mreq = nd->nd_mb = m; 4413 nd->nd_bpos = mtod(m, caddr_t); 4414 4415 /* 4416 * and build the callback request. 4417 */ 4418 if (procnum == NFSV4OP_CBGETATTR) { 4419 nd->nd_procnum = NFSV4PROC_CBCOMPOUND; 4420 error = nfsrv_cbcallargs(nd, clp, callback, NFSV4OP_CBGETATTR, 4421 "CB Getattr", &sep, &slotpos); 4422 if (error != 0) { 4423 m_freem(nd->nd_mreq); 4424 goto errout; 4425 } 4426 (void)nfsm_fhtom(NULL, nd, (u_int8_t *)fhp, NFSX_MYFH, 0); 4427 (void)nfsrv_putattrbit(nd, attrbitp); 4428 } else if (procnum == NFSV4OP_CBRECALL) { 4429 nd->nd_procnum = NFSV4PROC_CBCOMPOUND; 4430 error = nfsrv_cbcallargs(nd, clp, callback, NFSV4OP_CBRECALL, 4431 "CB Recall", &sep, &slotpos); 4432 if (error != 0) { 4433 m_freem(nd->nd_mreq); 4434 goto errout; 4435 } 4436 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_STATEID); 4437 *tl++ = txdr_unsigned(stateidp->seqid); 4438 NFSBCOPY((caddr_t)stateidp->other, (caddr_t)tl, 4439 NFSX_STATEIDOTHER); 4440 tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED); 4441 if (trunc) 4442 *tl = newnfs_true; 4443 else 4444 *tl = newnfs_false; 4445 (void)nfsm_fhtom(NULL, nd, (u_int8_t *)fhp, NFSX_MYFH, 0); 4446 } else if (procnum == NFSV4OP_CBLAYOUTRECALL) { 4447 NFSD_DEBUG(4, "docallback layout recall\n"); 4448 nd->nd_procnum = NFSV4PROC_CBCOMPOUND; 4449 error = nfsrv_cbcallargs(nd, clp, callback, 4450 NFSV4OP_CBLAYOUTRECALL, "CB Reclayout", &sep, &slotpos); 4451 NFSD_DEBUG(4, "aft cbcallargs=%d\n", error); 4452 if (error != 0) { 4453 m_freem(nd->nd_mreq); 4454 goto errout; 4455 } 4456 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 4457 *tl++ = txdr_unsigned(laytype); 4458 *tl++ = txdr_unsigned(NFSLAYOUTIOMODE_ANY); 4459 if (trunc) 4460 *tl++ = newnfs_true; 4461 else 4462 *tl++ = newnfs_false; 4463 *tl = txdr_unsigned(NFSV4LAYOUTRET_FILE); 4464 (void)nfsm_fhtom(NULL, nd, (uint8_t *)fhp, NFSX_MYFH, 0); 4465 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_HYPER + NFSX_STATEID); 4466 tval = 0; 4467 txdr_hyper(tval, tl); tl += 2; 4468 tval = UINT64_MAX; 4469 txdr_hyper(tval, tl); tl += 2; 4470 *tl++ = txdr_unsigned(stateidp->seqid); 4471 NFSBCOPY(stateidp->other, tl, NFSX_STATEIDOTHER); 4472 tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED); 4473 NFSD_DEBUG(4, "aft args\n"); 4474 } else if (procnum == NFSV4PROC_CBNULL) { 4475 nd->nd_procnum = NFSV4PROC_CBNULL; 4476 if ((clp->lc_flags & LCL_NFSV41) != 0) { 4477 error = nfsv4_getcbsession(clp, &sep); 4478 if (error != 0) { 4479 m_freem(nd->nd_mreq); 4480 goto errout; 4481 } 4482 } 4483 } else { 4484 error = NFSERR_SERVERFAULT; 4485 m_freem(nd->nd_mreq); 4486 goto errout; 4487 } 4488 4489 /* 4490 * Call newnfs_connect(), as required, and then newnfs_request(). 4491 */ 4492 dotls = false; 4493 if ((clp->lc_flags & LCL_TLSCB) != 0) 4494 dotls = true; 4495 (void) newnfs_sndlock(&clp->lc_req.nr_lock); 4496 if (clp->lc_req.nr_client == NULL) { 4497 if ((clp->lc_flags & LCL_NFSV41) != 0) { 4498 error = ECONNREFUSED; 4499 if (procnum != NFSV4PROC_CBNULL) 4500 nfsv4_freeslot(&sep->sess_cbsess, slotpos, 4501 true); 4502 nfsrv_freesession(NULL, sep, NULL); 4503 } else if (nd->nd_procnum == NFSV4PROC_CBNULL) 4504 error = newnfs_connect(NULL, &clp->lc_req, cred, 4505 NULL, 1, dotls, &clp->lc_req.nr_client); 4506 else 4507 error = newnfs_connect(NULL, &clp->lc_req, cred, 4508 NULL, 3, dotls, &clp->lc_req.nr_client); 4509 } 4510 newnfs_sndunlock(&clp->lc_req.nr_lock); 4511 NFSD_DEBUG(4, "aft sndunlock=%d\n", error); 4512 if (!error) { 4513 if ((nd->nd_flag & ND_NFSV41) != 0) { 4514 KASSERT(sep != NULL, ("sep NULL")); 4515 if (sep->sess_cbsess.nfsess_xprt != NULL) 4516 error = newnfs_request(nd, NULL, clp, 4517 &clp->lc_req, NULL, NULL, cred, 4518 clp->lc_program, clp->lc_req.nr_vers, NULL, 4519 1, NULL, &sep->sess_cbsess); 4520 else { 4521 /* 4522 * This should probably never occur, but if a 4523 * client somehow does an RPC without a 4524 * SequenceID Op that causes a callback just 4525 * after the nfsd threads have been terminated 4526 * and restarted we could conceivably get here 4527 * without a backchannel xprt. 4528 */ 4529 printf("nfsrv_docallback: no xprt\n"); 4530 error = ECONNREFUSED; 4531 } 4532 NFSD_DEBUG(4, "aft newnfs_request=%d\n", error); 4533 if (error != 0 && procnum != NFSV4PROC_CBNULL) { 4534 /* 4535 * It is likely that the callback was never 4536 * processed by the client and, as such, 4537 * the sequence# for the session slot needs 4538 * to be backed up by one to avoid a 4539 * NFSERR_SEQMISORDERED error reply. 4540 * For the unlikely case where the callback 4541 * was processed by the client, this will 4542 * make the next callback on the slot 4543 * appear to be a retry. 4544 * Since callbacks never specify that the 4545 * reply be cached, this "apparent retry" 4546 * should not be a problem. 4547 */ 4548 nfsv4_freeslot(&sep->sess_cbsess, slotpos, 4549 true); 4550 } 4551 nfsrv_freesession(NULL, sep, NULL); 4552 } else 4553 error = newnfs_request(nd, NULL, clp, &clp->lc_req, 4554 NULL, NULL, cred, clp->lc_program, 4555 clp->lc_req.nr_vers, NULL, 1, NULL, NULL); 4556 } 4557 errout: 4558 NFSFREECRED(cred); 4559 4560 /* 4561 * If error is set here, the Callback path isn't working 4562 * properly, so twiddle the appropriate LCL_ flags. 4563 * (nd_repstat != 0 indicates the Callback path is working, 4564 * but the callback failed on the client.) 4565 */ 4566 if (error) { 4567 /* 4568 * Mark the callback pathway down, which disabled issuing 4569 * of delegations and gets Renew to return NFSERR_CBPATHDOWN. 4570 */ 4571 NFSLOCKSTATE(); 4572 clp->lc_flags |= LCL_CBDOWN; 4573 NFSUNLOCKSTATE(); 4574 } else { 4575 /* 4576 * Callback worked. If the callback path was down, disable 4577 * callbacks, so no more delegations will be issued. (This 4578 * is done on the assumption that the callback pathway is 4579 * flakey.) 4580 */ 4581 NFSLOCKSTATE(); 4582 if (clp->lc_flags & LCL_CBDOWN) 4583 clp->lc_flags &= ~(LCL_CBDOWN | LCL_CALLBACKSON); 4584 NFSUNLOCKSTATE(); 4585 if (nd->nd_repstat) { 4586 error = nd->nd_repstat; 4587 NFSD_DEBUG(1, "nfsrv_docallback op=%d err=%d\n", 4588 procnum, error); 4589 } else if (error == 0 && procnum == NFSV4OP_CBGETATTR) 4590 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, 4591 NULL, NULL, NULL, NULL, NULL, 0, NULL, NULL, NULL, 4592 p, NULL); 4593 m_freem(nd->nd_mrep); 4594 } 4595 NFSLOCKSTATE(); 4596 clp->lc_cbref--; 4597 if ((clp->lc_flags & LCL_WAKEUPWANTED) && clp->lc_cbref == 0) { 4598 clp->lc_flags &= ~LCL_WAKEUPWANTED; 4599 wakeup(clp); 4600 } 4601 NFSUNLOCKSTATE(); 4602 4603 free(nd, M_TEMP); 4604 NFSEXITCODE(error); 4605 return (error); 4606 } 4607 4608 /* 4609 * Set up the compound RPC for the callback. 4610 */ 4611 static int 4612 nfsrv_cbcallargs(struct nfsrv_descript *nd, struct nfsclient *clp, 4613 uint32_t callback, int op, const char *optag, struct nfsdsession **sepp, 4614 int *slotposp) 4615 { 4616 uint32_t *tl; 4617 int error, len; 4618 4619 len = strlen(optag); 4620 (void)nfsm_strtom(nd, optag, len); 4621 NFSM_BUILD(tl, uint32_t *, 4 * NFSX_UNSIGNED); 4622 if ((nd->nd_flag & ND_NFSV41) != 0) { 4623 if ((nd->nd_flag & ND_NFSV42) != 0) 4624 *tl++ = txdr_unsigned(NFSV42_MINORVERSION); 4625 else 4626 *tl++ = txdr_unsigned(NFSV41_MINORVERSION); 4627 *tl++ = txdr_unsigned(callback); 4628 *tl++ = txdr_unsigned(2); 4629 *tl = txdr_unsigned(NFSV4OP_CBSEQUENCE); 4630 error = nfsv4_setcbsequence(nd, clp, 1, sepp, slotposp); 4631 if (error != 0) 4632 return (error); 4633 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 4634 *tl = txdr_unsigned(op); 4635 } else { 4636 *tl++ = txdr_unsigned(NFSV4_MINORVERSION); 4637 *tl++ = txdr_unsigned(callback); 4638 *tl++ = txdr_unsigned(1); 4639 *tl = txdr_unsigned(op); 4640 } 4641 return (0); 4642 } 4643 4644 /* 4645 * Return the next index# for a clientid. Mostly just increment and return 4646 * the next one, but... if the 32bit unsigned does actually wrap around, 4647 * it should be rebooted. 4648 * At an average rate of one new client per second, it will wrap around in 4649 * approximately 136 years. (I think the server will have been shut 4650 * down or rebooted before then.) 4651 */ 4652 static u_int32_t 4653 nfsrv_nextclientindex(void) 4654 { 4655 static u_int32_t client_index = 0; 4656 4657 client_index++; 4658 if (client_index != 0) 4659 return (client_index); 4660 4661 printf("%s: out of clientids\n", __func__); 4662 return (client_index); 4663 } 4664 4665 /* 4666 * Return the next index# for a stateid. Mostly just increment and return 4667 * the next one, but... if the 32bit unsigned does actually wrap around 4668 * (will a BSD server stay up that long?), find 4669 * new start and end values. 4670 */ 4671 static u_int32_t 4672 nfsrv_nextstateindex(struct nfsclient *clp) 4673 { 4674 struct nfsstate *stp; 4675 int i; 4676 u_int32_t canuse, min_index, max_index; 4677 4678 if (!(clp->lc_flags & LCL_INDEXNOTOK)) { 4679 clp->lc_stateindex++; 4680 if (clp->lc_stateindex != clp->lc_statemaxindex) 4681 return (clp->lc_stateindex); 4682 } 4683 4684 /* 4685 * Yuck, we've hit the end. 4686 * Look for a new min and max. 4687 */ 4688 min_index = 0; 4689 max_index = 0xffffffff; 4690 for (i = 0; i < nfsrv_statehashsize; i++) { 4691 LIST_FOREACH(stp, &clp->lc_stateid[i], ls_hash) { 4692 if (stp->ls_stateid.other[2] > 0x80000000) { 4693 if (stp->ls_stateid.other[2] < max_index) 4694 max_index = stp->ls_stateid.other[2]; 4695 } else { 4696 if (stp->ls_stateid.other[2] > min_index) 4697 min_index = stp->ls_stateid.other[2]; 4698 } 4699 } 4700 } 4701 4702 /* 4703 * Yikes, highly unlikely, but I'll handle it anyhow. 4704 */ 4705 if (min_index == 0x80000000 && max_index == 0x80000001) { 4706 canuse = 0; 4707 /* 4708 * Loop around until we find an unused entry. Return that 4709 * and set LCL_INDEXNOTOK, so the search will continue next time. 4710 * (This is one of those rare cases where a goto is the 4711 * cleanest way to code the loop.) 4712 */ 4713 tryagain: 4714 for (i = 0; i < nfsrv_statehashsize; i++) { 4715 LIST_FOREACH(stp, &clp->lc_stateid[i], ls_hash) { 4716 if (stp->ls_stateid.other[2] == canuse) { 4717 canuse++; 4718 goto tryagain; 4719 } 4720 } 4721 } 4722 clp->lc_flags |= LCL_INDEXNOTOK; 4723 return (canuse); 4724 } 4725 4726 /* 4727 * Ok to start again from min + 1. 4728 */ 4729 clp->lc_stateindex = min_index + 1; 4730 clp->lc_statemaxindex = max_index; 4731 clp->lc_flags &= ~LCL_INDEXNOTOK; 4732 return (clp->lc_stateindex); 4733 } 4734 4735 /* 4736 * The following functions handle the stable storage file that deals with 4737 * the edge conditions described in RFC3530 Sec. 8.6.3. 4738 * The file is as follows: 4739 * - a single record at the beginning that has the lease time of the 4740 * previous server instance (before the last reboot) and the nfsrvboottime 4741 * values for the previous server boots. 4742 * These previous boot times are used to ensure that the current 4743 * nfsrvboottime does not, somehow, get set to a previous one. 4744 * (This is important so that Stale ClientIDs and StateIDs can 4745 * be recognized.) 4746 * The number of previous nfsvrboottime values precedes the list. 4747 * - followed by some number of appended records with: 4748 * - client id string 4749 * - flag that indicates it is a record revoking state via lease 4750 * expiration or similar 4751 * OR has successfully acquired state. 4752 * These structures vary in length, with the client string at the end, up 4753 * to NFSV4_OPAQUELIMIT in size. 4754 * 4755 * At the end of the grace period, the file is truncated, the first 4756 * record is rewritten with updated information and any acquired state 4757 * records for successful reclaims of state are written. 4758 * 4759 * Subsequent records are appended when the first state is issued to 4760 * a client and when state is revoked for a client. 4761 * 4762 * When reading the file in, state issued records that come later in 4763 * the file override older ones, since the append log is in cronological order. 4764 * If, for some reason, the file can't be read, the grace period is 4765 * immediately terminated and all reclaims get NFSERR_NOGRACE. 4766 */ 4767 4768 /* 4769 * Read in the stable storage file. Called by nfssvc() before the nfsd 4770 * processes start servicing requests. 4771 */ 4772 void 4773 nfsrv_setupstable(NFSPROC_T *p) 4774 { 4775 struct nfsrv_stablefirst *sf = &NFSD_VNET(nfsrv_stablefirst); 4776 struct nfsrv_stable *sp, *nsp; 4777 struct nfst_rec *tsp; 4778 int error, i, tryagain; 4779 off_t off = 0; 4780 ssize_t aresid, len; 4781 4782 /* 4783 * If NFSNSF_UPDATEDONE is set, this is a restart of the nfsds without 4784 * a reboot, so state has not been lost. 4785 */ 4786 if (sf->nsf_flags & NFSNSF_UPDATEDONE) 4787 return; 4788 /* 4789 * Set Grace over just until the file reads successfully. 4790 */ 4791 NFSD_VNET(nfsrvboottime) = time_second; 4792 LIST_INIT(&sf->nsf_head); 4793 sf->nsf_flags = (NFSNSF_GRACEOVER | NFSNSF_NEEDLOCK); 4794 sf->nsf_eograce = NFSD_MONOSEC + NFSRV_LEASEDELTA; 4795 if (sf->nsf_fp == NULL) 4796 return; 4797 error = NFSD_RDWR(UIO_READ, NFSFPVNODE(sf->nsf_fp), 4798 (caddr_t)&sf->nsf_rec, sizeof (struct nfsf_rec), off, UIO_SYSSPACE, 4799 0, NFSFPCRED(sf->nsf_fp), &aresid, p); 4800 if (error || aresid || sf->nsf_numboots == 0 || 4801 sf->nsf_numboots > NFSNSF_MAXNUMBOOTS) 4802 return; 4803 4804 /* 4805 * Now, read in the boottimes. 4806 */ 4807 sf->nsf_bootvals = (time_t *)malloc((sf->nsf_numboots + 1) * 4808 sizeof(time_t), M_TEMP, M_WAITOK); 4809 off = sizeof (struct nfsf_rec); 4810 error = NFSD_RDWR(UIO_READ, NFSFPVNODE(sf->nsf_fp), 4811 (caddr_t)sf->nsf_bootvals, sf->nsf_numboots * sizeof (time_t), off, 4812 UIO_SYSSPACE, 0, NFSFPCRED(sf->nsf_fp), &aresid, p); 4813 if (error || aresid) { 4814 free(sf->nsf_bootvals, M_TEMP); 4815 sf->nsf_bootvals = NULL; 4816 return; 4817 } 4818 4819 /* 4820 * Make sure this nfsrvboottime is different from all recorded 4821 * previous ones. 4822 */ 4823 do { 4824 tryagain = 0; 4825 for (i = 0; i < sf->nsf_numboots; i++) { 4826 if (NFSD_VNET(nfsrvboottime) == sf->nsf_bootvals[i]) { 4827 NFSD_VNET(nfsrvboottime)++; 4828 tryagain = 1; 4829 break; 4830 } 4831 } 4832 } while (tryagain); 4833 4834 sf->nsf_flags |= NFSNSF_OK; 4835 off += (sf->nsf_numboots * sizeof (time_t)); 4836 4837 /* 4838 * Read through the file, building a list of records for grace 4839 * checking. 4840 * Each record is between sizeof (struct nfst_rec) and 4841 * sizeof (struct nfst_rec) + NFSV4_OPAQUELIMIT - 1 4842 * and is actually sizeof (struct nfst_rec) + nst_len - 1. 4843 */ 4844 tsp = (struct nfst_rec *)malloc(sizeof (struct nfst_rec) + 4845 NFSV4_OPAQUELIMIT - 1, M_TEMP, M_WAITOK); 4846 do { 4847 error = NFSD_RDWR(UIO_READ, NFSFPVNODE(sf->nsf_fp), 4848 (caddr_t)tsp, sizeof (struct nfst_rec) + NFSV4_OPAQUELIMIT - 1, 4849 off, UIO_SYSSPACE, 0, NFSFPCRED(sf->nsf_fp), &aresid, p); 4850 len = (sizeof (struct nfst_rec) + NFSV4_OPAQUELIMIT - 1) - aresid; 4851 if (error || (len > 0 && (len < sizeof (struct nfst_rec) || 4852 len < (sizeof (struct nfst_rec) + tsp->len - 1)))) { 4853 /* 4854 * Yuck, the file has been corrupted, so just return 4855 * after clearing out any restart state, so the grace period 4856 * is over. 4857 */ 4858 LIST_FOREACH_SAFE(sp, &sf->nsf_head, nst_list, nsp) { 4859 LIST_REMOVE(sp, nst_list); 4860 free(sp, M_TEMP); 4861 } 4862 free(tsp, M_TEMP); 4863 sf->nsf_flags &= ~NFSNSF_OK; 4864 free(sf->nsf_bootvals, M_TEMP); 4865 sf->nsf_bootvals = NULL; 4866 return; 4867 } 4868 if (len > 0) { 4869 off += sizeof (struct nfst_rec) + tsp->len - 1; 4870 /* 4871 * Search the list for a matching client. 4872 */ 4873 LIST_FOREACH(sp, &sf->nsf_head, nst_list) { 4874 if (tsp->len == sp->nst_len && 4875 !NFSBCMP(tsp->client, sp->nst_client, tsp->len)) 4876 break; 4877 } 4878 if (sp == LIST_END(&sf->nsf_head)) { 4879 sp = (struct nfsrv_stable *)malloc(tsp->len + 4880 sizeof (struct nfsrv_stable) - 1, M_TEMP, 4881 M_WAITOK); 4882 NFSBCOPY((caddr_t)tsp, (caddr_t)&sp->nst_rec, 4883 sizeof (struct nfst_rec) + tsp->len - 1); 4884 LIST_INSERT_HEAD(&sf->nsf_head, sp, nst_list); 4885 } else { 4886 if (tsp->flag == NFSNST_REVOKE) 4887 sp->nst_flag |= NFSNST_REVOKE; 4888 else 4889 /* 4890 * A subsequent timestamp indicates the client 4891 * did a setclientid/confirm and any previous 4892 * revoke is no longer relevant. 4893 */ 4894 sp->nst_flag &= ~NFSNST_REVOKE; 4895 } 4896 } 4897 } while (len > 0); 4898 free(tsp, M_TEMP); 4899 sf->nsf_flags = NFSNSF_OK; 4900 sf->nsf_eograce = NFSD_MONOSEC + sf->nsf_lease + 4901 NFSRV_LEASEDELTA; 4902 } 4903 4904 /* 4905 * Update the stable storage file, now that the grace period is over. 4906 */ 4907 void 4908 nfsrv_updatestable(NFSPROC_T *p) 4909 { 4910 struct nfsrv_stablefirst *sf = &NFSD_VNET(nfsrv_stablefirst); 4911 struct nfsrv_stable *sp, *nsp; 4912 int i; 4913 struct nfsvattr nva; 4914 vnode_t vp; 4915 #if defined(__FreeBSD_version) && (__FreeBSD_version >= 500000) 4916 mount_t mp = NULL; 4917 #endif 4918 int error; 4919 4920 if (sf->nsf_fp == NULL || (sf->nsf_flags & NFSNSF_UPDATEDONE)) 4921 return; 4922 sf->nsf_flags |= NFSNSF_UPDATEDONE; 4923 /* 4924 * Ok, we need to rewrite the stable storage file. 4925 * - truncate to 0 length 4926 * - write the new first structure 4927 * - loop through the data structures, writing out any that 4928 * have timestamps older than the old boot 4929 */ 4930 if (sf->nsf_bootvals) { 4931 sf->nsf_numboots++; 4932 for (i = sf->nsf_numboots - 2; i >= 0; i--) 4933 sf->nsf_bootvals[i + 1] = sf->nsf_bootvals[i]; 4934 } else { 4935 sf->nsf_numboots = 1; 4936 sf->nsf_bootvals = (time_t *)malloc(sizeof(time_t), 4937 M_TEMP, M_WAITOK); 4938 } 4939 sf->nsf_bootvals[0] = NFSD_VNET(nfsrvboottime); 4940 sf->nsf_lease = nfsrv_lease; 4941 NFSVNO_ATTRINIT(&nva); 4942 NFSVNO_SETATTRVAL(&nva, size, 0); 4943 vp = NFSFPVNODE(sf->nsf_fp); 4944 vn_start_write(vp, &mp, V_WAIT); 4945 if (NFSVOPLOCK(vp, LK_EXCLUSIVE) == 0) { 4946 error = nfsvno_setattr(vp, &nva, NFSFPCRED(sf->nsf_fp), p, 4947 NULL); 4948 NFSVOPUNLOCK(vp); 4949 } else 4950 error = EPERM; 4951 vn_finished_write(mp); 4952 if (!error) 4953 error = NFSD_RDWR(UIO_WRITE, vp, 4954 (caddr_t)&sf->nsf_rec, sizeof (struct nfsf_rec), (off_t)0, 4955 UIO_SYSSPACE, IO_SYNC, NFSFPCRED(sf->nsf_fp), NULL, p); 4956 if (!error) 4957 error = NFSD_RDWR(UIO_WRITE, vp, 4958 (caddr_t)sf->nsf_bootvals, 4959 sf->nsf_numboots * sizeof (time_t), 4960 (off_t)(sizeof (struct nfsf_rec)), 4961 UIO_SYSSPACE, IO_SYNC, NFSFPCRED(sf->nsf_fp), NULL, p); 4962 free(sf->nsf_bootvals, M_TEMP); 4963 sf->nsf_bootvals = NULL; 4964 if (error) { 4965 sf->nsf_flags &= ~NFSNSF_OK; 4966 printf("EEK! Can't write NfsV4 stable storage file\n"); 4967 return; 4968 } 4969 sf->nsf_flags |= NFSNSF_OK; 4970 4971 /* 4972 * Loop through the list and write out timestamp records for 4973 * any clients that successfully reclaimed state. 4974 */ 4975 LIST_FOREACH_SAFE(sp, &sf->nsf_head, nst_list, nsp) { 4976 if (sp->nst_flag & NFSNST_GOTSTATE) { 4977 nfsrv_writestable(sp->nst_client, sp->nst_len, 4978 NFSNST_NEWSTATE, p); 4979 sp->nst_clp->lc_flags |= LCL_STAMPEDSTABLE; 4980 } 4981 LIST_REMOVE(sp, nst_list); 4982 free(sp, M_TEMP); 4983 } 4984 nfsrv_backupstable(); 4985 } 4986 4987 /* 4988 * Append a record to the stable storage file. 4989 */ 4990 void 4991 nfsrv_writestable(u_char *client, int len, int flag, NFSPROC_T *p) 4992 { 4993 struct nfsrv_stablefirst *sf = &NFSD_VNET(nfsrv_stablefirst); 4994 struct nfst_rec *sp; 4995 int error; 4996 4997 if (!(sf->nsf_flags & NFSNSF_OK) || sf->nsf_fp == NULL) 4998 return; 4999 sp = (struct nfst_rec *)malloc(sizeof (struct nfst_rec) + 5000 len - 1, M_TEMP, M_WAITOK); 5001 sp->len = len; 5002 NFSBCOPY(client, sp->client, len); 5003 sp->flag = flag; 5004 error = NFSD_RDWR(UIO_WRITE, NFSFPVNODE(sf->nsf_fp), 5005 (caddr_t)sp, sizeof (struct nfst_rec) + len - 1, (off_t)0, 5006 UIO_SYSSPACE, (IO_SYNC | IO_APPEND), NFSFPCRED(sf->nsf_fp), NULL, p); 5007 free(sp, M_TEMP); 5008 if (error) { 5009 sf->nsf_flags &= ~NFSNSF_OK; 5010 printf("EEK! Can't write NfsV4 stable storage file\n"); 5011 } 5012 } 5013 5014 /* 5015 * This function is called during the grace period to mark a client 5016 * that successfully reclaimed state. 5017 */ 5018 static void 5019 nfsrv_markstable(struct nfsclient *clp) 5020 { 5021 struct nfsrv_stable *sp; 5022 5023 /* 5024 * First find the client structure. 5025 */ 5026 LIST_FOREACH(sp, &NFSD_VNET(nfsrv_stablefirst).nsf_head, nst_list) { 5027 if (sp->nst_len == clp->lc_idlen && 5028 !NFSBCMP(sp->nst_client, clp->lc_id, sp->nst_len)) 5029 break; 5030 } 5031 if (sp == LIST_END(&NFSD_VNET(nfsrv_stablefirst).nsf_head)) 5032 return; 5033 5034 /* 5035 * Now, just mark it and set the nfsclient back pointer. 5036 */ 5037 sp->nst_flag |= NFSNST_GOTSTATE; 5038 sp->nst_clp = clp; 5039 } 5040 5041 /* 5042 * This function is called when a NFSv4.1 client does a ReclaimComplete. 5043 * Very similar to nfsrv_markstable(), except for the flag being set. 5044 */ 5045 static void 5046 nfsrv_markreclaim(struct nfsclient *clp) 5047 { 5048 struct nfsrv_stable *sp; 5049 5050 /* 5051 * First find the client structure. 5052 */ 5053 LIST_FOREACH(sp, &NFSD_VNET(nfsrv_stablefirst).nsf_head, nst_list) { 5054 if (sp->nst_len == clp->lc_idlen && 5055 !NFSBCMP(sp->nst_client, clp->lc_id, sp->nst_len)) 5056 break; 5057 } 5058 if (sp == LIST_END(&NFSD_VNET(nfsrv_stablefirst).nsf_head)) 5059 return; 5060 5061 /* 5062 * Now, just set the flag. 5063 */ 5064 sp->nst_flag |= NFSNST_RECLAIMED; 5065 5066 /* 5067 * Free up any old delegations. 5068 */ 5069 nfsrv_freedeleglist(&clp->lc_olddeleg); 5070 } 5071 5072 /* 5073 * This function is called for a reclaim, to see if it gets grace. 5074 * It returns 0 if a reclaim is allowed, 1 otherwise. 5075 */ 5076 static int 5077 nfsrv_checkstable(struct nfsclient *clp) 5078 { 5079 struct nfsrv_stable *sp; 5080 5081 /* 5082 * First, find the entry for the client. 5083 */ 5084 LIST_FOREACH(sp, &NFSD_VNET(nfsrv_stablefirst).nsf_head, nst_list) { 5085 if (sp->nst_len == clp->lc_idlen && 5086 !NFSBCMP(sp->nst_client, clp->lc_id, sp->nst_len)) 5087 break; 5088 } 5089 5090 /* 5091 * If not in the list, state was revoked or no state was issued 5092 * since the previous reboot, a reclaim is denied. 5093 */ 5094 if (sp == LIST_END(&NFSD_VNET(nfsrv_stablefirst).nsf_head) || 5095 (sp->nst_flag & NFSNST_REVOKE) || 5096 !(NFSD_VNET(nfsrv_stablefirst).nsf_flags & NFSNSF_OK)) 5097 return (1); 5098 return (0); 5099 } 5100 5101 /* 5102 * Test for and try to clear out a conflicting client. This is called by 5103 * nfsrv_lockctrl() and nfsrv_openctrl() when conflicts with other clients 5104 * a found. 5105 * The trick here is that it can't revoke a conflicting client with an 5106 * expired lease unless it holds the v4root lock, so... 5107 * If no v4root lock, get the lock and return 1 to indicate "try again". 5108 * Return 0 to indicate the conflict can't be revoked and 1 to indicate 5109 * the revocation worked and the conflicting client is "bye, bye", so it 5110 * can be tried again. 5111 * Return 2 to indicate that the vnode is VIRF_DOOMED after NFSVOPLOCK(). 5112 * Unlocks State before a non-zero value is returned. 5113 */ 5114 static int 5115 nfsrv_clientconflict(struct nfsclient *clp, int *haslockp, vnode_t vp, 5116 NFSPROC_T *p) 5117 { 5118 int gotlock, lktype = 0; 5119 5120 /* 5121 * If lease hasn't expired, we can't fix it. 5122 */ 5123 if (clp->lc_expiry >= NFSD_MONOSEC || 5124 !(NFSD_VNET(nfsrv_stablefirst).nsf_flags & NFSNSF_UPDATEDONE)) 5125 return (0); 5126 if (*haslockp == 0) { 5127 NFSUNLOCKSTATE(); 5128 if (vp != NULL) { 5129 lktype = NFSVOPISLOCKED(vp); 5130 NFSVOPUNLOCK(vp); 5131 } 5132 NFSLOCKV4ROOTMUTEX(); 5133 nfsv4_relref(&nfsv4rootfs_lock); 5134 do { 5135 gotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 5136 NFSV4ROOTLOCKMUTEXPTR, NULL); 5137 } while (!gotlock); 5138 NFSUNLOCKV4ROOTMUTEX(); 5139 *haslockp = 1; 5140 if (vp != NULL) { 5141 NFSVOPLOCK(vp, lktype | LK_RETRY); 5142 if (VN_IS_DOOMED(vp)) 5143 return (2); 5144 } 5145 return (1); 5146 } 5147 NFSUNLOCKSTATE(); 5148 5149 /* 5150 * Ok, we can expire the conflicting client. 5151 */ 5152 nfsrv_writestable(clp->lc_id, clp->lc_idlen, NFSNST_REVOKE, p); 5153 nfsrv_backupstable(); 5154 nfsrv_cleanclient(clp, p); 5155 nfsrv_freedeleglist(&clp->lc_deleg); 5156 nfsrv_freedeleglist(&clp->lc_olddeleg); 5157 LIST_REMOVE(clp, lc_hash); 5158 nfsrv_zapclient(clp, p); 5159 return (1); 5160 } 5161 5162 /* 5163 * Resolve a delegation conflict. 5164 * Returns 0 to indicate the conflict was resolved without sleeping. 5165 * Return -1 to indicate that the caller should check for conflicts again. 5166 * Return > 0 for an error that should be returned, normally NFSERR_DELAY. 5167 * 5168 * Also, manipulate the nfsv4root_lock, as required. It isn't changed 5169 * for a return of 0, since there was no sleep and it could be required 5170 * later. It is released for a return of NFSERR_DELAY, since the caller 5171 * will return that error. It is released when a sleep was done waiting 5172 * for the delegation to be returned or expire (so that other nfsds can 5173 * handle ops). Then, it must be acquired for the write to stable storage. 5174 * (This function is somewhat similar to nfsrv_clientconflict(), but 5175 * the semantics differ in a couple of subtle ways. The return of 0 5176 * indicates the conflict was resolved without sleeping here, not 5177 * that the conflict can't be resolved and the handling of nfsv4root_lock 5178 * differs, as noted above.) 5179 * Unlocks State before returning a non-zero value. 5180 */ 5181 static int 5182 nfsrv_delegconflict(struct nfsstate *stp, int *haslockp, NFSPROC_T *p, 5183 vnode_t vp) 5184 { 5185 struct nfsclient *clp = stp->ls_clp; 5186 int gotlock, error, lktype = 0, retrycnt, zapped_clp; 5187 nfsv4stateid_t tstateid; 5188 fhandle_t tfh; 5189 5190 /* 5191 * If the conflict is with an old delegation... 5192 */ 5193 if (stp->ls_flags & NFSLCK_OLDDELEG) { 5194 /* 5195 * You can delete it, if it has expired. 5196 */ 5197 if (clp->lc_delegtime < NFSD_MONOSEC) { 5198 nfsrv_freedeleg(stp); 5199 NFSUNLOCKSTATE(); 5200 error = -1; 5201 goto out; 5202 } 5203 NFSUNLOCKSTATE(); 5204 /* 5205 * During this delay, the old delegation could expire or it 5206 * could be recovered by the client via an Open with 5207 * CLAIM_DELEGATE_PREV. 5208 * Release the nfsv4root_lock, if held. 5209 */ 5210 if (*haslockp) { 5211 *haslockp = 0; 5212 NFSLOCKV4ROOTMUTEX(); 5213 nfsv4_unlock(&nfsv4rootfs_lock, 1); 5214 NFSUNLOCKV4ROOTMUTEX(); 5215 } 5216 error = NFSERR_DELAY; 5217 goto out; 5218 } 5219 5220 /* 5221 * It's a current delegation, so: 5222 * - check to see if the delegation has expired 5223 * - if so, get the v4root lock and then expire it 5224 */ 5225 if ((stp->ls_flags & NFSLCK_DELEGRECALL) == 0 || (stp->ls_lastrecall < 5226 NFSD_MONOSEC && clp->lc_expiry >= NFSD_MONOSEC && 5227 stp->ls_delegtime >= NFSD_MONOSEC)) { 5228 /* 5229 * - do a recall callback, since not yet done 5230 * For now, never allow truncate to be set. To use 5231 * truncate safely, it must be guaranteed that the 5232 * Remove, Rename or Setattr with size of 0 will 5233 * succeed and that would require major changes to 5234 * the VFS/Vnode OPs. 5235 * Set the expiry time large enough so that it won't expire 5236 * until after the callback, then set it correctly, once 5237 * the callback is done. (The delegation will now time 5238 * out whether or not the Recall worked ok. The timeout 5239 * will be extended when ops are done on the delegation 5240 * stateid, up to the timelimit.) 5241 */ 5242 if ((stp->ls_flags & NFSLCK_DELEGRECALL) == 0) { 5243 stp->ls_delegtime = NFSD_MONOSEC + (2 * nfsrv_lease) + 5244 NFSRV_LEASEDELTA; 5245 stp->ls_delegtimelimit = NFSD_MONOSEC + (6 * 5246 nfsrv_lease) + NFSRV_LEASEDELTA; 5247 stp->ls_flags |= NFSLCK_DELEGRECALL; 5248 } 5249 stp->ls_lastrecall = time_uptime + 1; 5250 5251 /* 5252 * Loop NFSRV_CBRETRYCNT times while the CBRecall replies 5253 * NFSERR_BADSTATEID or NFSERR_BADHANDLE. This is done 5254 * in order to try and avoid a race that could happen 5255 * when a CBRecall request passed the Open reply with 5256 * the delegation in it when transitting the network. 5257 * Since nfsrv_docallback will sleep, don't use stp after 5258 * the call. 5259 */ 5260 NFSBCOPY((caddr_t)&stp->ls_stateid, (caddr_t)&tstateid, 5261 sizeof (tstateid)); 5262 NFSBCOPY((caddr_t)&stp->ls_lfp->lf_fh, (caddr_t)&tfh, 5263 sizeof (tfh)); 5264 NFSUNLOCKSTATE(); 5265 if (*haslockp) { 5266 *haslockp = 0; 5267 NFSLOCKV4ROOTMUTEX(); 5268 nfsv4_unlock(&nfsv4rootfs_lock, 1); 5269 NFSUNLOCKV4ROOTMUTEX(); 5270 } 5271 retrycnt = 0; 5272 do { 5273 error = nfsrv_docallback(clp, NFSV4OP_CBRECALL, 5274 &tstateid, 0, &tfh, NULL, NULL, 0, p); 5275 retrycnt++; 5276 } while ((error == NFSERR_BADSTATEID || 5277 error == NFSERR_BADHANDLE) && retrycnt < NFSV4_CBRETRYCNT); 5278 error = NFSERR_DELAY; 5279 goto out; 5280 } 5281 5282 if (clp->lc_expiry >= NFSD_MONOSEC && 5283 stp->ls_delegtime >= NFSD_MONOSEC) { 5284 NFSUNLOCKSTATE(); 5285 /* 5286 * A recall has been done, but it has not yet expired. 5287 * So, RETURN_DELAY. 5288 */ 5289 if (*haslockp) { 5290 *haslockp = 0; 5291 NFSLOCKV4ROOTMUTEX(); 5292 nfsv4_unlock(&nfsv4rootfs_lock, 1); 5293 NFSUNLOCKV4ROOTMUTEX(); 5294 } 5295 error = NFSERR_DELAY; 5296 goto out; 5297 } 5298 5299 /* 5300 * If we don't yet have the lock, just get it and then return, 5301 * since we need that before deleting expired state, such as 5302 * this delegation. 5303 * When getting the lock, unlock the vnode, so other nfsds that 5304 * are in progress, won't get stuck waiting for the vnode lock. 5305 */ 5306 if (*haslockp == 0) { 5307 NFSUNLOCKSTATE(); 5308 if (vp != NULL) { 5309 lktype = NFSVOPISLOCKED(vp); 5310 NFSVOPUNLOCK(vp); 5311 } 5312 NFSLOCKV4ROOTMUTEX(); 5313 nfsv4_relref(&nfsv4rootfs_lock); 5314 do { 5315 gotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 5316 NFSV4ROOTLOCKMUTEXPTR, NULL); 5317 } while (!gotlock); 5318 NFSUNLOCKV4ROOTMUTEX(); 5319 *haslockp = 1; 5320 if (vp != NULL) { 5321 NFSVOPLOCK(vp, lktype | LK_RETRY); 5322 if (VN_IS_DOOMED(vp)) { 5323 *haslockp = 0; 5324 NFSLOCKV4ROOTMUTEX(); 5325 nfsv4_unlock(&nfsv4rootfs_lock, 1); 5326 NFSUNLOCKV4ROOTMUTEX(); 5327 error = NFSERR_PERM; 5328 goto out; 5329 } 5330 } 5331 error = -1; 5332 goto out; 5333 } 5334 5335 NFSUNLOCKSTATE(); 5336 /* 5337 * Ok, we can delete the expired delegation. 5338 * First, write the Revoke record to stable storage and then 5339 * clear out the conflict. 5340 * Since all other nfsd threads are now blocked, we can safely 5341 * sleep without the state changing. 5342 */ 5343 nfsrv_writestable(clp->lc_id, clp->lc_idlen, NFSNST_REVOKE, p); 5344 nfsrv_backupstable(); 5345 if (clp->lc_expiry < NFSD_MONOSEC) { 5346 nfsrv_cleanclient(clp, p); 5347 nfsrv_freedeleglist(&clp->lc_deleg); 5348 nfsrv_freedeleglist(&clp->lc_olddeleg); 5349 LIST_REMOVE(clp, lc_hash); 5350 zapped_clp = 1; 5351 } else { 5352 nfsrv_freedeleg(stp); 5353 zapped_clp = 0; 5354 } 5355 if (zapped_clp) 5356 nfsrv_zapclient(clp, p); 5357 error = -1; 5358 5359 out: 5360 NFSEXITCODE(error); 5361 return (error); 5362 } 5363 5364 /* 5365 * Check for a remove allowed, if remove is set to 1 and get rid of 5366 * delegations. 5367 */ 5368 int 5369 nfsrv_checkremove(vnode_t vp, int remove, struct nfsrv_descript *nd, 5370 nfsquad_t clientid, NFSPROC_T *p) 5371 { 5372 struct nfsclient *clp; 5373 struct nfsstate *stp; 5374 struct nfslockfile *lfp; 5375 int error, haslock = 0; 5376 fhandle_t nfh; 5377 5378 clp = NULL; 5379 /* 5380 * First, get the lock file structure. 5381 * (A return of -1 means no associated state, so remove ok.) 5382 */ 5383 error = nfsrv_getlockfh(vp, NFSLCK_CHECK, NULL, &nfh, p); 5384 tryagain: 5385 NFSLOCKSTATE(); 5386 if (error == 0 && clientid.qval != 0) 5387 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 5388 (nfsquad_t)((u_quad_t)0), 0, nd, p); 5389 if (!error) 5390 error = nfsrv_getlockfile(NFSLCK_CHECK, NULL, &lfp, &nfh, 0); 5391 if (error) { 5392 NFSUNLOCKSTATE(); 5393 if (haslock) { 5394 NFSLOCKV4ROOTMUTEX(); 5395 nfsv4_unlock(&nfsv4rootfs_lock, 1); 5396 NFSUNLOCKV4ROOTMUTEX(); 5397 } 5398 if (error == -1) 5399 error = 0; 5400 goto out; 5401 } 5402 5403 /* 5404 * Now, we must Recall any delegations. 5405 */ 5406 error = nfsrv_cleandeleg(vp, lfp, clp, &haslock, p); 5407 if (error) { 5408 /* 5409 * nfsrv_cleandeleg() unlocks state for non-zero 5410 * return. 5411 */ 5412 if (error == -1) 5413 goto tryagain; 5414 if (haslock) { 5415 NFSLOCKV4ROOTMUTEX(); 5416 nfsv4_unlock(&nfsv4rootfs_lock, 1); 5417 NFSUNLOCKV4ROOTMUTEX(); 5418 } 5419 goto out; 5420 } 5421 5422 /* 5423 * Now, look for a conflicting open share. 5424 */ 5425 if (remove) { 5426 /* 5427 * If the entry in the directory was the last reference to the 5428 * corresponding filesystem object, the object can be destroyed 5429 * */ 5430 if(lfp->lf_usecount>1) 5431 LIST_FOREACH(stp, &lfp->lf_open, ls_file) { 5432 if (stp->ls_flags & NFSLCK_WRITEDENY) { 5433 error = NFSERR_FILEOPEN; 5434 break; 5435 } 5436 } 5437 } 5438 5439 NFSUNLOCKSTATE(); 5440 if (haslock) { 5441 NFSLOCKV4ROOTMUTEX(); 5442 nfsv4_unlock(&nfsv4rootfs_lock, 1); 5443 NFSUNLOCKV4ROOTMUTEX(); 5444 } 5445 5446 out: 5447 NFSEXITCODE(error); 5448 return (error); 5449 } 5450 5451 /* 5452 * Clear out all delegations for the file referred to by lfp. 5453 * May return NFSERR_DELAY, if there will be a delay waiting for 5454 * delegations to expire. 5455 * Returns -1 to indicate it slept while recalling a delegation. 5456 * This function has the side effect of deleting the nfslockfile structure, 5457 * if it no longer has associated state and didn't have to sleep. 5458 * Unlocks State before a non-zero value is returned. 5459 */ 5460 static int 5461 nfsrv_cleandeleg(vnode_t vp, struct nfslockfile *lfp, 5462 struct nfsclient *clp, int *haslockp, NFSPROC_T *p) 5463 { 5464 struct nfsstate *stp, *nstp; 5465 int ret = 0; 5466 5467 stp = LIST_FIRST(&lfp->lf_deleg); 5468 while (stp != LIST_END(&lfp->lf_deleg)) { 5469 nstp = LIST_NEXT(stp, ls_file); 5470 if (stp->ls_clp != clp) { 5471 ret = nfsrv_delegconflict(stp, haslockp, p, vp); 5472 if (ret) { 5473 /* 5474 * nfsrv_delegconflict() unlocks state 5475 * when it returns non-zero. 5476 */ 5477 goto out; 5478 } 5479 } 5480 stp = nstp; 5481 } 5482 out: 5483 NFSEXITCODE(ret); 5484 return (ret); 5485 } 5486 5487 /* 5488 * There are certain operations that, when being done outside of NFSv4, 5489 * require that any NFSv4 delegation for the file be recalled. 5490 * This function is to be called for those cases: 5491 * VOP_RENAME() - When a delegation is being recalled for any reason, 5492 * the client may have to do Opens against the server, using the file's 5493 * final component name. If the file has been renamed on the server, 5494 * that component name will be incorrect and the Open will fail. 5495 * VOP_REMOVE() - Theoretically, a client could Open a file after it has 5496 * been removed on the server, if there is a delegation issued to 5497 * that client for the file. I say "theoretically" since clients 5498 * normally do an Access Op before the Open and that Access Op will 5499 * fail with ESTALE. Note that NFSv2 and 3 don't even do Opens, so 5500 * they will detect the file's removal in the same manner. (There is 5501 * one case where RFC3530 allows a client to do an Open without first 5502 * doing an Access Op, which is passage of a check against the ACE 5503 * returned with a Write delegation, but current practice is to ignore 5504 * the ACE and always do an Access Op.) 5505 * Since the functions can only be called with an unlocked vnode, this 5506 * can't be done at this time. 5507 * VOP_ADVLOCK() - When a client holds a delegation, it can issue byte range 5508 * locks locally in the client, which are not visible to the server. To 5509 * deal with this, issuing of delegations for a vnode must be disabled 5510 * and all delegations for the vnode recalled. This is done via the 5511 * second function, using the VV_DISABLEDELEG vflag on the vnode. 5512 */ 5513 void 5514 nfsd_recalldelegation(vnode_t vp, NFSPROC_T *p) 5515 { 5516 time_t starttime; 5517 int error; 5518 5519 /* 5520 * First, check to see if the server is currently running and it has 5521 * been called for a regular file when issuing delegations. 5522 */ 5523 if (NFSD_VNET(nfsrv_numnfsd) == 0 || vp->v_type != VREG || 5524 nfsrv_issuedelegs == 0) 5525 return; 5526 5527 KASSERT((NFSVOPISLOCKED(vp) != LK_EXCLUSIVE), ("vp %p is locked", vp)); 5528 /* 5529 * First, get a reference on the nfsv4rootfs_lock so that an 5530 * exclusive lock cannot be acquired by another thread. 5531 */ 5532 NFSLOCKV4ROOTMUTEX(); 5533 nfsv4_getref(&nfsv4rootfs_lock, NULL, NFSV4ROOTLOCKMUTEXPTR, NULL); 5534 NFSUNLOCKV4ROOTMUTEX(); 5535 5536 /* 5537 * Now, call nfsrv_checkremove() in a loop while it returns 5538 * NFSERR_DELAY. Return upon any other error or when timed out. 5539 */ 5540 starttime = NFSD_MONOSEC; 5541 do { 5542 if (NFSVOPLOCK(vp, LK_EXCLUSIVE) == 0) { 5543 error = nfsrv_checkremove(vp, 0, NULL, 5544 (nfsquad_t)((u_quad_t)0), p); 5545 NFSVOPUNLOCK(vp); 5546 } else 5547 error = EPERM; 5548 if (error == NFSERR_DELAY) { 5549 if (NFSD_MONOSEC - starttime > NFS_REMOVETIMEO) 5550 break; 5551 /* Sleep for a short period of time */ 5552 (void) nfs_catnap(PZERO, 0, "nfsremove"); 5553 } 5554 } while (error == NFSERR_DELAY); 5555 NFSLOCKV4ROOTMUTEX(); 5556 nfsv4_relref(&nfsv4rootfs_lock); 5557 NFSUNLOCKV4ROOTMUTEX(); 5558 } 5559 5560 void 5561 nfsd_disabledelegation(vnode_t vp, NFSPROC_T *p) 5562 { 5563 5564 #ifdef VV_DISABLEDELEG 5565 /* 5566 * First, flag issuance of delegations disabled. 5567 */ 5568 atomic_set_long(&vp->v_vflag, VV_DISABLEDELEG); 5569 #endif 5570 5571 /* 5572 * Then call nfsd_recalldelegation() to get rid of all extant 5573 * delegations. 5574 */ 5575 nfsd_recalldelegation(vp, p); 5576 } 5577 5578 /* 5579 * Check for conflicting locks, etc. and then get rid of delegations. 5580 * (At one point I thought that I should get rid of delegations for any 5581 * Setattr, since it could potentially disallow the I/O op (read or write) 5582 * allowed by the delegation. However, Setattr Ops that aren't changing 5583 * the size get a stateid of all 0s, so you can't tell if it is a delegation 5584 * for the same client or a different one, so I decided to only get rid 5585 * of delegations for other clients when the size is being changed.) 5586 * In general, a Setattr can disable NFS I/O Ops that are outstanding, such 5587 * as Write backs, even if there is no delegation, so it really isn't any 5588 * different?) 5589 */ 5590 int 5591 nfsrv_checksetattr(vnode_t vp, struct nfsrv_descript *nd, 5592 nfsv4stateid_t *stateidp, struct nfsvattr *nvap, nfsattrbit_t *attrbitp, 5593 struct nfsexstuff *exp, NFSPROC_T *p) 5594 { 5595 struct nfsstate st, *stp = &st; 5596 struct nfslock lo, *lop = &lo; 5597 int error = 0; 5598 nfsquad_t clientid; 5599 5600 if (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_SIZE)) { 5601 stp->ls_flags = (NFSLCK_CHECK | NFSLCK_WRITEACCESS); 5602 lop->lo_first = nvap->na_size; 5603 } else { 5604 stp->ls_flags = 0; 5605 lop->lo_first = 0; 5606 } 5607 if (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_OWNER) || 5608 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_OWNERGROUP) || 5609 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_MODE) || 5610 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_ACL)) 5611 stp->ls_flags |= NFSLCK_SETATTR; 5612 if (stp->ls_flags == 0) 5613 goto out; 5614 lop->lo_end = NFS64BITSSET; 5615 lop->lo_flags = NFSLCK_WRITE; 5616 stp->ls_ownerlen = 0; 5617 stp->ls_op = NULL; 5618 stp->ls_uid = nd->nd_cred->cr_uid; 5619 stp->ls_stateid.seqid = stateidp->seqid; 5620 clientid.lval[0] = stp->ls_stateid.other[0] = stateidp->other[0]; 5621 clientid.lval[1] = stp->ls_stateid.other[1] = stateidp->other[1]; 5622 stp->ls_stateid.other[2] = stateidp->other[2]; 5623 error = nfsrv_lockctrl(vp, &stp, &lop, NULL, clientid, 5624 stateidp, exp, nd, p); 5625 5626 out: 5627 NFSEXITCODE2(error, nd); 5628 return (error); 5629 } 5630 5631 /* 5632 * Check for a write delegation and do a CBGETATTR if there is one, updating 5633 * the attributes, as required. 5634 * Should I return an error if I can't get the attributes? (For now, I'll 5635 * just return ok. 5636 */ 5637 int 5638 nfsrv_checkgetattr(struct nfsrv_descript *nd, vnode_t vp, 5639 struct nfsvattr *nvap, nfsattrbit_t *attrbitp, NFSPROC_T *p) 5640 { 5641 struct nfsstate *stp; 5642 struct nfslockfile *lfp; 5643 struct nfsclient *clp; 5644 struct nfsvattr nva; 5645 fhandle_t nfh; 5646 int error = 0; 5647 nfsattrbit_t cbbits; 5648 u_quad_t delegfilerev; 5649 5650 NFSCBGETATTR_ATTRBIT(attrbitp, &cbbits); 5651 if (!NFSNONZERO_ATTRBIT(&cbbits)) 5652 goto out; 5653 if (nfsrv_writedelegcnt == 0) 5654 goto out; 5655 5656 /* 5657 * Get the lock file structure. 5658 * (A return of -1 means no associated state, so return ok.) 5659 */ 5660 error = nfsrv_getlockfh(vp, NFSLCK_CHECK, NULL, &nfh, p); 5661 NFSLOCKSTATE(); 5662 if (!error) 5663 error = nfsrv_getlockfile(NFSLCK_CHECK, NULL, &lfp, &nfh, 0); 5664 if (error) { 5665 NFSUNLOCKSTATE(); 5666 if (error == -1) 5667 error = 0; 5668 goto out; 5669 } 5670 5671 /* 5672 * Now, look for a write delegation. 5673 */ 5674 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) { 5675 if (stp->ls_flags & NFSLCK_DELEGWRITE) 5676 break; 5677 } 5678 if (stp == LIST_END(&lfp->lf_deleg)) { 5679 NFSUNLOCKSTATE(); 5680 goto out; 5681 } 5682 clp = stp->ls_clp; 5683 5684 /* If the clientid is not confirmed, ignore the delegation. */ 5685 if (clp->lc_flags & LCL_NEEDSCONFIRM) { 5686 NFSUNLOCKSTATE(); 5687 goto out; 5688 } 5689 5690 delegfilerev = stp->ls_filerev; 5691 /* 5692 * If the Write delegation was issued as a part of this Compound RPC 5693 * or if we have an Implied Clientid (used in a previous Op in this 5694 * compound) and it is the client the delegation was issued to, 5695 * just return ok. 5696 * I also assume that it is from the same client iff the network 5697 * host IP address is the same as the callback address. (Not 5698 * exactly correct by the RFC, but avoids a lot of Getattr 5699 * callbacks.) 5700 */ 5701 if (nd->nd_compref == stp->ls_compref || 5702 ((nd->nd_flag & ND_IMPLIEDCLID) && 5703 clp->lc_clientid.qval == nd->nd_clientid.qval) || 5704 nfsaddr2_match(clp->lc_req.nr_nam, nd->nd_nam)) { 5705 NFSUNLOCKSTATE(); 5706 goto out; 5707 } 5708 5709 /* 5710 * We are now done with the delegation state structure, 5711 * so the statelock can be released and we can now tsleep(). 5712 */ 5713 5714 /* 5715 * Now, we must do the CB Getattr callback, to see if Change or Size 5716 * has changed. 5717 */ 5718 if (clp->lc_expiry >= NFSD_MONOSEC) { 5719 NFSUNLOCKSTATE(); 5720 NFSVNO_ATTRINIT(&nva); 5721 nva.na_filerev = NFS64BITSSET; 5722 error = nfsrv_docallback(clp, NFSV4OP_CBGETATTR, NULL, 5723 0, &nfh, &nva, &cbbits, 0, p); 5724 if (!error) { 5725 if ((nva.na_filerev != NFS64BITSSET && 5726 nva.na_filerev > delegfilerev) || 5727 (NFSVNO_ISSETSIZE(&nva) && 5728 nva.na_size != nvap->na_size)) { 5729 error = nfsvno_updfilerev(vp, nvap, nd, p); 5730 if (NFSVNO_ISSETSIZE(&nva)) 5731 nvap->na_size = nva.na_size; 5732 } 5733 } else 5734 error = 0; /* Ignore callback errors for now. */ 5735 } else { 5736 NFSUNLOCKSTATE(); 5737 } 5738 5739 out: 5740 NFSEXITCODE2(error, nd); 5741 return (error); 5742 } 5743 5744 /* 5745 * This function looks for openowners that haven't had any opens for 5746 * a while and throws them away. Called by an nfsd when NFSNSF_NOOPENS 5747 * is set. 5748 */ 5749 void 5750 nfsrv_throwawayopens(NFSPROC_T *p) 5751 { 5752 struct nfsclient *clp, *nclp; 5753 struct nfsstate *stp, *nstp; 5754 int i; 5755 5756 NFSLOCKSTATE(); 5757 NFSD_VNET(nfsrv_stablefirst).nsf_flags &= ~NFSNSF_NOOPENS; 5758 /* 5759 * For each client... 5760 */ 5761 for (i = 0; i < nfsrv_clienthashsize; i++) { 5762 LIST_FOREACH_SAFE(clp, &NFSD_VNET(nfsclienthash)[i], lc_hash, 5763 nclp) { 5764 LIST_FOREACH_SAFE(stp, &clp->lc_open, ls_list, nstp) { 5765 if (LIST_EMPTY(&stp->ls_open) && 5766 (stp->ls_noopens > NFSNOOPEN || 5767 (nfsrv_openpluslock * 2) > 5768 nfsrv_v4statelimit)) 5769 nfsrv_freeopenowner(stp, 0, p); 5770 } 5771 } 5772 } 5773 NFSUNLOCKSTATE(); 5774 } 5775 5776 /* 5777 * This function checks to see if the credentials are the same. 5778 * The check for same credentials is needed for state management operations 5779 * for NFSv4.0 or NFSv4.1/4.2 when SP4_MACH_CRED is configured via 5780 * ExchangeID. 5781 * Returns 1 for not same, 0 otherwise. 5782 */ 5783 static int 5784 nfsrv_notsamecredname(int op, struct nfsrv_descript *nd, struct nfsclient *clp) 5785 { 5786 5787 /* Check for the SP4_MACH_CRED case. */ 5788 if (op != 0 && nfsrv_checkmachcred(op, nd, clp) != 0) 5789 return (1); 5790 5791 /* For NFSv4.1/4.2, SP4_NONE always allows this. */ 5792 if ((nd->nd_flag & ND_NFSV41) != 0) 5793 return (0); 5794 5795 if (nd->nd_flag & ND_GSS) { 5796 if (!(clp->lc_flags & LCL_GSS)) 5797 return (1); 5798 if (clp->lc_flags & LCL_NAME) { 5799 if (nd->nd_princlen != clp->lc_namelen || 5800 NFSBCMP(nd->nd_principal, clp->lc_name, 5801 clp->lc_namelen)) 5802 return (1); 5803 else 5804 return (0); 5805 } 5806 if (nd->nd_cred->cr_uid == clp->lc_uid) 5807 return (0); 5808 else 5809 return (1); 5810 } else if (clp->lc_flags & LCL_GSS) 5811 return (1); 5812 /* 5813 * For AUTH_SYS, allow the same uid or root. (This is underspecified 5814 * in RFC3530, which talks about principals, but doesn't say anything 5815 * about uids for AUTH_SYS.) 5816 */ 5817 if (nd->nd_cred->cr_uid == clp->lc_uid || nd->nd_cred->cr_uid == 0) 5818 return (0); 5819 else 5820 return (1); 5821 } 5822 5823 /* 5824 * Calculate the lease expiry time. 5825 */ 5826 static time_t 5827 nfsrv_leaseexpiry(void) 5828 { 5829 5830 if (NFSD_VNET(nfsrv_stablefirst).nsf_eograce > NFSD_MONOSEC) 5831 return (NFSD_MONOSEC + 2 * (nfsrv_lease + NFSRV_LEASEDELTA)); 5832 return (NFSD_MONOSEC + nfsrv_lease + NFSRV_LEASEDELTA); 5833 } 5834 5835 /* 5836 * Delay the delegation timeout as far as ls_delegtimelimit, as required. 5837 */ 5838 static void 5839 nfsrv_delaydelegtimeout(struct nfsstate *stp) 5840 { 5841 5842 if ((stp->ls_flags & NFSLCK_DELEGRECALL) == 0) 5843 return; 5844 5845 if ((stp->ls_delegtime + 15) > NFSD_MONOSEC && 5846 stp->ls_delegtime < stp->ls_delegtimelimit) { 5847 stp->ls_delegtime += nfsrv_lease; 5848 if (stp->ls_delegtime > stp->ls_delegtimelimit) 5849 stp->ls_delegtime = stp->ls_delegtimelimit; 5850 } 5851 } 5852 5853 /* 5854 * This function checks to see if there is any other state associated 5855 * with the openowner for this Open. 5856 * It returns 1 if there is no other state, 0 otherwise. 5857 */ 5858 static int 5859 nfsrv_nootherstate(struct nfsstate *stp) 5860 { 5861 struct nfsstate *tstp; 5862 5863 LIST_FOREACH(tstp, &stp->ls_openowner->ls_open, ls_list) { 5864 if (tstp != stp || !LIST_EMPTY(&tstp->ls_lock)) 5865 return (0); 5866 } 5867 return (1); 5868 } 5869 5870 /* 5871 * Create a list of lock deltas (changes to local byte range locking 5872 * that can be rolled back using the list) and apply the changes via 5873 * nfsvno_advlock(). Optionally, lock the list. It is expected that either 5874 * the rollback or update function will be called after this. 5875 * It returns an error (and rolls back, as required), if any nfsvno_advlock() 5876 * call fails. If it returns an error, it will unlock the list. 5877 */ 5878 static int 5879 nfsrv_locallock(vnode_t vp, struct nfslockfile *lfp, int flags, 5880 uint64_t first, uint64_t end, struct nfslockconflict *cfp, NFSPROC_T *p) 5881 { 5882 struct nfslock *lop, *nlop; 5883 int error = 0; 5884 5885 /* Loop through the list of locks. */ 5886 lop = LIST_FIRST(&lfp->lf_locallock); 5887 while (first < end && lop != NULL) { 5888 nlop = LIST_NEXT(lop, lo_lckowner); 5889 if (first >= lop->lo_end) { 5890 /* not there yet */ 5891 lop = nlop; 5892 } else if (first < lop->lo_first) { 5893 /* new one starts before entry in list */ 5894 if (end <= lop->lo_first) { 5895 /* no overlap between old and new */ 5896 error = nfsrv_dolocal(vp, lfp, flags, 5897 NFSLCK_UNLOCK, first, end, cfp, p); 5898 if (error != 0) 5899 break; 5900 first = end; 5901 } else { 5902 /* handle fragment overlapped with new one */ 5903 error = nfsrv_dolocal(vp, lfp, flags, 5904 NFSLCK_UNLOCK, first, lop->lo_first, cfp, 5905 p); 5906 if (error != 0) 5907 break; 5908 first = lop->lo_first; 5909 } 5910 } else { 5911 /* new one overlaps this entry in list */ 5912 if (end <= lop->lo_end) { 5913 /* overlaps all of new one */ 5914 error = nfsrv_dolocal(vp, lfp, flags, 5915 lop->lo_flags, first, end, cfp, p); 5916 if (error != 0) 5917 break; 5918 first = end; 5919 } else { 5920 /* handle fragment overlapped with new one */ 5921 error = nfsrv_dolocal(vp, lfp, flags, 5922 lop->lo_flags, first, lop->lo_end, cfp, p); 5923 if (error != 0) 5924 break; 5925 first = lop->lo_end; 5926 lop = nlop; 5927 } 5928 } 5929 } 5930 if (first < end && error == 0) 5931 /* handle fragment past end of list */ 5932 error = nfsrv_dolocal(vp, lfp, flags, NFSLCK_UNLOCK, first, 5933 end, cfp, p); 5934 5935 NFSEXITCODE(error); 5936 return (error); 5937 } 5938 5939 /* 5940 * Local lock unlock. Unlock all byte ranges that are no longer locked 5941 * by NFSv4. To do this, unlock any subranges of first-->end that 5942 * do not overlap with the byte ranges of any lock in the lfp->lf_lock 5943 * list. This list has all locks for the file held by other 5944 * <clientid, lockowner> tuples. The list is ordered by increasing 5945 * lo_first value, but may have entries that overlap each other, for 5946 * the case of read locks. 5947 */ 5948 static void 5949 nfsrv_localunlock(vnode_t vp, struct nfslockfile *lfp, uint64_t init_first, 5950 uint64_t init_end, NFSPROC_T *p) 5951 { 5952 struct nfslock *lop; 5953 uint64_t first, end, prevfirst __unused; 5954 5955 first = init_first; 5956 end = init_end; 5957 while (first < init_end) { 5958 /* Loop through all nfs locks, adjusting first and end */ 5959 prevfirst = 0; 5960 LIST_FOREACH(lop, &lfp->lf_lock, lo_lckfile) { 5961 KASSERT(prevfirst <= lop->lo_first, 5962 ("nfsv4 locks out of order")); 5963 KASSERT(lop->lo_first < lop->lo_end, 5964 ("nfsv4 bogus lock")); 5965 prevfirst = lop->lo_first; 5966 if (first >= lop->lo_first && 5967 first < lop->lo_end) 5968 /* 5969 * Overlaps with initial part, so trim 5970 * off that initial part by moving first past 5971 * it. 5972 */ 5973 first = lop->lo_end; 5974 else if (end > lop->lo_first && 5975 lop->lo_first > first) { 5976 /* 5977 * This lock defines the end of the 5978 * segment to unlock, so set end to the 5979 * start of it and break out of the loop. 5980 */ 5981 end = lop->lo_first; 5982 break; 5983 } 5984 if (first >= end) 5985 /* 5986 * There is no segment left to do, so 5987 * break out of this loop and then exit 5988 * the outer while() since first will be set 5989 * to end, which must equal init_end here. 5990 */ 5991 break; 5992 } 5993 if (first < end) { 5994 /* Unlock this segment */ 5995 (void) nfsrv_dolocal(vp, lfp, NFSLCK_UNLOCK, 5996 NFSLCK_READ, first, end, NULL, p); 5997 nfsrv_locallock_commit(lfp, NFSLCK_UNLOCK, 5998 first, end); 5999 } 6000 /* 6001 * Now move past this segment and look for any further 6002 * segment in the range, if there is one. 6003 */ 6004 first = end; 6005 end = init_end; 6006 } 6007 } 6008 6009 /* 6010 * Do the local lock operation and update the rollback list, as required. 6011 * Perform the rollback and return the error if nfsvno_advlock() fails. 6012 */ 6013 static int 6014 nfsrv_dolocal(vnode_t vp, struct nfslockfile *lfp, int flags, int oldflags, 6015 uint64_t first, uint64_t end, struct nfslockconflict *cfp, NFSPROC_T *p) 6016 { 6017 struct nfsrollback *rlp; 6018 int error = 0, ltype, oldltype; 6019 6020 if (flags & NFSLCK_WRITE) 6021 ltype = F_WRLCK; 6022 else if (flags & NFSLCK_READ) 6023 ltype = F_RDLCK; 6024 else 6025 ltype = F_UNLCK; 6026 if (oldflags & NFSLCK_WRITE) 6027 oldltype = F_WRLCK; 6028 else if (oldflags & NFSLCK_READ) 6029 oldltype = F_RDLCK; 6030 else 6031 oldltype = F_UNLCK; 6032 if (ltype == oldltype || (oldltype == F_WRLCK && ltype == F_RDLCK)) 6033 /* nothing to do */ 6034 goto out; 6035 error = nfsvno_advlock(vp, ltype, first, end, p); 6036 if (error != 0) { 6037 if (cfp != NULL) { 6038 cfp->cl_clientid.lval[0] = 0; 6039 cfp->cl_clientid.lval[1] = 0; 6040 cfp->cl_first = 0; 6041 cfp->cl_end = NFS64BITSSET; 6042 cfp->cl_flags = NFSLCK_WRITE; 6043 cfp->cl_ownerlen = 5; 6044 NFSBCOPY("LOCAL", cfp->cl_owner, 5); 6045 } 6046 nfsrv_locallock_rollback(vp, lfp, p); 6047 } else if (ltype != F_UNLCK) { 6048 rlp = malloc(sizeof (struct nfsrollback), M_NFSDROLLBACK, 6049 M_WAITOK); 6050 rlp->rlck_first = first; 6051 rlp->rlck_end = end; 6052 rlp->rlck_type = oldltype; 6053 LIST_INSERT_HEAD(&lfp->lf_rollback, rlp, rlck_list); 6054 } 6055 6056 out: 6057 NFSEXITCODE(error); 6058 return (error); 6059 } 6060 6061 /* 6062 * Roll back local lock changes and free up the rollback list. 6063 */ 6064 static void 6065 nfsrv_locallock_rollback(vnode_t vp, struct nfslockfile *lfp, NFSPROC_T *p) 6066 { 6067 struct nfsrollback *rlp, *nrlp; 6068 6069 LIST_FOREACH_SAFE(rlp, &lfp->lf_rollback, rlck_list, nrlp) { 6070 (void) nfsvno_advlock(vp, rlp->rlck_type, rlp->rlck_first, 6071 rlp->rlck_end, p); 6072 free(rlp, M_NFSDROLLBACK); 6073 } 6074 LIST_INIT(&lfp->lf_rollback); 6075 } 6076 6077 /* 6078 * Update local lock list and delete rollback list (ie now committed to the 6079 * local locks). Most of the work is done by the internal function. 6080 */ 6081 static void 6082 nfsrv_locallock_commit(struct nfslockfile *lfp, int flags, uint64_t first, 6083 uint64_t end) 6084 { 6085 struct nfsrollback *rlp, *nrlp; 6086 struct nfslock *new_lop, *other_lop; 6087 6088 new_lop = malloc(sizeof (struct nfslock), M_NFSDLOCK, M_WAITOK); 6089 if (flags & (NFSLCK_READ | NFSLCK_WRITE)) 6090 other_lop = malloc(sizeof (struct nfslock), M_NFSDLOCK, 6091 M_WAITOK); 6092 else 6093 other_lop = NULL; 6094 new_lop->lo_flags = flags; 6095 new_lop->lo_first = first; 6096 new_lop->lo_end = end; 6097 nfsrv_updatelock(NULL, &new_lop, &other_lop, lfp); 6098 if (new_lop != NULL) 6099 free(new_lop, M_NFSDLOCK); 6100 if (other_lop != NULL) 6101 free(other_lop, M_NFSDLOCK); 6102 6103 /* and get rid of the rollback list */ 6104 LIST_FOREACH_SAFE(rlp, &lfp->lf_rollback, rlck_list, nrlp) 6105 free(rlp, M_NFSDROLLBACK); 6106 LIST_INIT(&lfp->lf_rollback); 6107 } 6108 6109 /* 6110 * Lock the struct nfslockfile for local lock updating. 6111 */ 6112 static void 6113 nfsrv_locklf(struct nfslockfile *lfp) 6114 { 6115 int gotlock; 6116 6117 /* lf_usecount ensures *lfp won't be free'd */ 6118 lfp->lf_usecount++; 6119 do { 6120 gotlock = nfsv4_lock(&lfp->lf_locallock_lck, 1, NULL, 6121 NFSSTATEMUTEXPTR, NULL); 6122 } while (gotlock == 0); 6123 lfp->lf_usecount--; 6124 } 6125 6126 /* 6127 * Unlock the struct nfslockfile after local lock updating. 6128 */ 6129 static void 6130 nfsrv_unlocklf(struct nfslockfile *lfp) 6131 { 6132 6133 nfsv4_unlock(&lfp->lf_locallock_lck, 0); 6134 } 6135 6136 /* 6137 * Clear out all state for the NFSv4 server. 6138 * Must be called by a thread that can sleep when no nfsds are running. 6139 */ 6140 void 6141 nfsrv_throwawayallstate(NFSPROC_T *p) 6142 { 6143 struct nfsclient *clp, *nclp; 6144 struct nfslockfile *lfp, *nlfp; 6145 int i; 6146 6147 /* 6148 * For each client, clean out the state and then free the structure. 6149 */ 6150 for (i = 0; i < nfsrv_clienthashsize; i++) { 6151 LIST_FOREACH_SAFE(clp, &NFSD_VNET(nfsclienthash)[i], lc_hash, 6152 nclp) { 6153 nfsrv_cleanclient(clp, p); 6154 nfsrv_freedeleglist(&clp->lc_deleg); 6155 nfsrv_freedeleglist(&clp->lc_olddeleg); 6156 free(clp->lc_stateid, M_NFSDCLIENT); 6157 free(clp, M_NFSDCLIENT); 6158 } 6159 } 6160 6161 /* 6162 * Also, free up any remaining lock file structures. 6163 */ 6164 for (i = 0; i < nfsrv_lockhashsize; i++) { 6165 LIST_FOREACH_SAFE(lfp, &NFSD_VNET(nfslockhash)[i], lf_hash, 6166 nlfp) { 6167 printf("nfsd unload: fnd a lock file struct\n"); 6168 nfsrv_freenfslockfile(lfp); 6169 } 6170 } 6171 6172 /* And get rid of the deviceid structures and layouts. */ 6173 nfsrv_freealllayoutsanddevids(); 6174 } 6175 6176 /* 6177 * Check the sequence# for the session and slot provided as an argument. 6178 * Also, renew the lease if the session will return NFS_OK. 6179 */ 6180 int 6181 nfsrv_checksequence(struct nfsrv_descript *nd, uint32_t sequenceid, 6182 uint32_t *highest_slotidp, uint32_t *target_highest_slotidp, int cache_this, 6183 uint32_t *sflagsp, NFSPROC_T *p) 6184 { 6185 struct nfsdsession *sep; 6186 struct nfssessionhash *shp; 6187 int error; 6188 6189 shp = NFSSESSIONHASH(nd->nd_sessionid); 6190 NFSLOCKSESSION(shp); 6191 sep = nfsrv_findsession(nd->nd_sessionid); 6192 if (sep == NULL) { 6193 NFSUNLOCKSESSION(shp); 6194 return (NFSERR_BADSESSION); 6195 } 6196 error = nfsv4_seqsession(sequenceid, nd->nd_slotid, *highest_slotidp, 6197 sep->sess_slots, NULL, NFSV4_SLOTS - 1); 6198 if (error != 0) { 6199 NFSUNLOCKSESSION(shp); 6200 return (error); 6201 } 6202 if (cache_this != 0) 6203 nd->nd_flag |= ND_SAVEREPLY; 6204 /* Renew the lease. */ 6205 sep->sess_clp->lc_expiry = nfsrv_leaseexpiry(); 6206 nd->nd_clientid.qval = sep->sess_clp->lc_clientid.qval; 6207 nd->nd_flag |= ND_IMPLIEDCLID; 6208 6209 /* Handle the SP4_MECH_CRED case for NFSv4.1/4.2. */ 6210 if ((sep->sess_clp->lc_flags & LCL_MACHCRED) != 0 && 6211 (nd->nd_flag & (ND_GSSINTEGRITY | ND_GSSPRIVACY)) != 0 && 6212 nd->nd_princlen == sep->sess_clp->lc_namelen && 6213 !NFSBCMP(sep->sess_clp->lc_name, nd->nd_principal, 6214 nd->nd_princlen)) { 6215 nd->nd_flag |= ND_MACHCRED; 6216 NFSSET_OPBIT(&nd->nd_allowops, &sep->sess_clp->lc_allowops); 6217 } 6218 6219 /* Save maximum request and reply sizes. */ 6220 nd->nd_maxreq = sep->sess_maxreq; 6221 nd->nd_maxresp = sep->sess_maxresp; 6222 6223 *sflagsp = 0; 6224 if (sep->sess_clp->lc_req.nr_client == NULL || 6225 (sep->sess_clp->lc_flags & LCL_CBDOWN) != 0) 6226 *sflagsp |= NFSV4SEQ_CBPATHDOWN; 6227 NFSUNLOCKSESSION(shp); 6228 if (error == NFSERR_EXPIRED) { 6229 *sflagsp |= NFSV4SEQ_EXPIREDALLSTATEREVOKED; 6230 error = 0; 6231 } else if (error == NFSERR_ADMINREVOKED) { 6232 *sflagsp |= NFSV4SEQ_ADMINSTATEREVOKED; 6233 error = 0; 6234 } 6235 *highest_slotidp = *target_highest_slotidp = NFSV4_SLOTS - 1; 6236 return (0); 6237 } 6238 6239 /* 6240 * Check/set reclaim complete for this session/clientid. 6241 */ 6242 int 6243 nfsrv_checkreclaimcomplete(struct nfsrv_descript *nd, int onefs) 6244 { 6245 struct nfsdsession *sep; 6246 struct nfssessionhash *shp; 6247 int error = 0; 6248 6249 shp = NFSSESSIONHASH(nd->nd_sessionid); 6250 NFSLOCKSTATE(); 6251 NFSLOCKSESSION(shp); 6252 sep = nfsrv_findsession(nd->nd_sessionid); 6253 if (sep == NULL) { 6254 NFSUNLOCKSESSION(shp); 6255 NFSUNLOCKSTATE(); 6256 return (NFSERR_BADSESSION); 6257 } 6258 6259 if (onefs != 0) 6260 sep->sess_clp->lc_flags |= LCL_RECLAIMONEFS; 6261 /* Check to see if reclaim complete has already happened. */ 6262 else if ((sep->sess_clp->lc_flags & LCL_RECLAIMCOMPLETE) != 0) 6263 error = NFSERR_COMPLETEALREADY; 6264 else { 6265 sep->sess_clp->lc_flags |= LCL_RECLAIMCOMPLETE; 6266 nfsrv_markreclaim(sep->sess_clp); 6267 } 6268 NFSUNLOCKSESSION(shp); 6269 NFSUNLOCKSTATE(); 6270 return (error); 6271 } 6272 6273 /* 6274 * Cache the reply in a session slot. 6275 */ 6276 void 6277 nfsrv_cache_session(struct nfsrv_descript *nd, struct mbuf **m) 6278 { 6279 struct nfsdsession *sep; 6280 struct nfssessionhash *shp; 6281 char *buf, *cp; 6282 #ifdef INET 6283 struct sockaddr_in *sin; 6284 #endif 6285 #ifdef INET6 6286 struct sockaddr_in6 *sin6; 6287 #endif 6288 6289 shp = NFSSESSIONHASH(nd->nd_sessionid); 6290 NFSLOCKSESSION(shp); 6291 sep = nfsrv_findsession(nd->nd_sessionid); 6292 if (sep == NULL) { 6293 NFSUNLOCKSESSION(shp); 6294 if ((NFSD_VNET(nfsrv_stablefirst).nsf_flags & 6295 NFSNSF_GRACEOVER) != 0) { 6296 buf = malloc(INET6_ADDRSTRLEN, M_TEMP, M_WAITOK); 6297 switch (nd->nd_nam->sa_family) { 6298 #ifdef INET 6299 case AF_INET: 6300 sin = (struct sockaddr_in *)nd->nd_nam; 6301 cp = inet_ntop(sin->sin_family, 6302 &sin->sin_addr.s_addr, buf, 6303 INET6_ADDRSTRLEN); 6304 break; 6305 #endif 6306 #ifdef INET6 6307 case AF_INET6: 6308 sin6 = (struct sockaddr_in6 *)nd->nd_nam; 6309 cp = inet_ntop(sin6->sin6_family, 6310 &sin6->sin6_addr, buf, INET6_ADDRSTRLEN); 6311 break; 6312 #endif 6313 default: 6314 cp = NULL; 6315 } 6316 if (cp != NULL) 6317 printf("nfsrv_cache_session: no session " 6318 "IPaddr=%s, check NFS clients for unique " 6319 "/etc/hostid's\n", cp); 6320 else 6321 printf("nfsrv_cache_session: no session, " 6322 "check NFS clients for unique " 6323 "/etc/hostid's\n"); 6324 free(buf, M_TEMP); 6325 } 6326 m_freem(*m); 6327 return; 6328 } 6329 nfsv4_seqsess_cacherep(nd->nd_slotid, sep->sess_slots, nd->nd_repstat, 6330 m); 6331 NFSUNLOCKSESSION(shp); 6332 } 6333 6334 /* 6335 * Search for a session that matches the sessionid. 6336 */ 6337 static struct nfsdsession * 6338 nfsrv_findsession(uint8_t *sessionid) 6339 { 6340 struct nfsdsession *sep; 6341 struct nfssessionhash *shp; 6342 6343 shp = NFSSESSIONHASH(sessionid); 6344 LIST_FOREACH(sep, &shp->list, sess_hash) { 6345 if (!NFSBCMP(sessionid, sep->sess_sessionid, NFSX_V4SESSIONID)) 6346 break; 6347 } 6348 return (sep); 6349 } 6350 6351 /* 6352 * Destroy a session. 6353 */ 6354 int 6355 nfsrv_destroysession(struct nfsrv_descript *nd, uint8_t *sessionid) 6356 { 6357 int error, igotlock, samesess; 6358 6359 samesess = 0; 6360 if (!NFSBCMP(sessionid, nd->nd_sessionid, NFSX_V4SESSIONID) && 6361 (nd->nd_flag & ND_HASSEQUENCE) != 0) { 6362 samesess = 1; 6363 if ((nd->nd_flag & ND_LASTOP) == 0) 6364 return (NFSERR_BADSESSION); 6365 } 6366 6367 /* Lock out other nfsd threads */ 6368 NFSLOCKV4ROOTMUTEX(); 6369 nfsv4_relref(&nfsv4rootfs_lock); 6370 do { 6371 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 6372 NFSV4ROOTLOCKMUTEXPTR, NULL); 6373 } while (igotlock == 0); 6374 NFSUNLOCKV4ROOTMUTEX(); 6375 6376 error = nfsrv_freesession(nd, NULL, sessionid); 6377 if (error == 0 && samesess != 0) 6378 nd->nd_flag &= ~ND_HASSEQUENCE; 6379 6380 NFSLOCKV4ROOTMUTEX(); 6381 nfsv4_unlock(&nfsv4rootfs_lock, 1); 6382 NFSUNLOCKV4ROOTMUTEX(); 6383 return (error); 6384 } 6385 6386 /* 6387 * Bind a connection to a session. 6388 * For now, only certain variants are supported, since the current session 6389 * structure can only handle a single backchannel entry, which will be 6390 * applied to all connections if it is set. 6391 */ 6392 int 6393 nfsrv_bindconnsess(struct nfsrv_descript *nd, uint8_t *sessionid, int *foreaftp) 6394 { 6395 struct nfssessionhash *shp; 6396 struct nfsdsession *sep; 6397 struct nfsclient *clp; 6398 SVCXPRT *savxprt; 6399 int error; 6400 6401 error = 0; 6402 savxprt = NULL; 6403 shp = NFSSESSIONHASH(sessionid); 6404 NFSLOCKSTATE(); 6405 NFSLOCKSESSION(shp); 6406 sep = nfsrv_findsession(sessionid); 6407 if (sep != NULL) { 6408 clp = sep->sess_clp; 6409 error = nfsrv_checkmachcred(NFSV4OP_BINDCONNTOSESS, nd, clp); 6410 if (error != 0) 6411 goto out; 6412 if (*foreaftp == NFSCDFC4_BACK || 6413 *foreaftp == NFSCDFC4_BACK_OR_BOTH || 6414 *foreaftp == NFSCDFC4_FORE_OR_BOTH) { 6415 /* Try to set up a backchannel. */ 6416 if (clp->lc_req.nr_client == NULL) { 6417 NFSD_DEBUG(2, "nfsrv_bindconnsess: acquire " 6418 "backchannel\n"); 6419 clp->lc_req.nr_client = (struct __rpc_client *) 6420 clnt_bck_create(nd->nd_xprt->xp_socket, 6421 sep->sess_cbprogram, NFSV4_CBVERS); 6422 } 6423 if (clp->lc_req.nr_client != NULL) { 6424 NFSD_DEBUG(2, "nfsrv_bindconnsess: set up " 6425 "backchannel\n"); 6426 savxprt = sep->sess_cbsess.nfsess_xprt; 6427 SVC_ACQUIRE(nd->nd_xprt); 6428 CLNT_ACQUIRE(clp->lc_req.nr_client); 6429 nd->nd_xprt->xp_p2 = clp->lc_req.nr_client; 6430 /* Disable idle timeout. */ 6431 nd->nd_xprt->xp_idletimeout = 0; 6432 sep->sess_cbsess.nfsess_xprt = nd->nd_xprt; 6433 sep->sess_crflags |= NFSV4CRSESS_CONNBACKCHAN; 6434 clp->lc_flags |= LCL_DONEBINDCONN | 6435 LCL_NEEDSCBNULL; 6436 clp->lc_flags &= ~LCL_CBDOWN; 6437 if (*foreaftp == NFSCDFS4_BACK) 6438 *foreaftp = NFSCDFS4_BACK; 6439 else 6440 *foreaftp = NFSCDFS4_BOTH; 6441 } else if (*foreaftp != NFSCDFC4_BACK) { 6442 NFSD_DEBUG(2, "nfsrv_bindconnsess: can't set " 6443 "up backchannel\n"); 6444 sep->sess_crflags &= ~NFSV4CRSESS_CONNBACKCHAN; 6445 clp->lc_flags |= LCL_DONEBINDCONN; 6446 *foreaftp = NFSCDFS4_FORE; 6447 } else { 6448 error = NFSERR_NOTSUPP; 6449 printf("nfsrv_bindconnsess: Can't add " 6450 "backchannel\n"); 6451 } 6452 } else { 6453 NFSD_DEBUG(2, "nfsrv_bindconnsess: Set forechannel\n"); 6454 clp->lc_flags |= LCL_DONEBINDCONN; 6455 *foreaftp = NFSCDFS4_FORE; 6456 } 6457 } else 6458 error = NFSERR_BADSESSION; 6459 out: 6460 NFSUNLOCKSESSION(shp); 6461 NFSUNLOCKSTATE(); 6462 if (savxprt != NULL) 6463 SVC_RELEASE(savxprt); 6464 return (error); 6465 } 6466 6467 /* 6468 * Free up a session structure. 6469 */ 6470 static int 6471 nfsrv_freesession(struct nfsrv_descript *nd, struct nfsdsession *sep, 6472 uint8_t *sessionid) 6473 { 6474 struct nfssessionhash *shp; 6475 int i; 6476 6477 NFSLOCKSTATE(); 6478 if (sep == NULL) { 6479 shp = NFSSESSIONHASH(sessionid); 6480 NFSLOCKSESSION(shp); 6481 sep = nfsrv_findsession(sessionid); 6482 } else { 6483 shp = NFSSESSIONHASH(sep->sess_sessionid); 6484 NFSLOCKSESSION(shp); 6485 } 6486 if (sep != NULL) { 6487 /* Check for the SP4_MACH_CRED case. */ 6488 if (nd != NULL && nfsrv_checkmachcred(NFSV4OP_DESTROYSESSION, 6489 nd, sep->sess_clp) != 0) { 6490 NFSUNLOCKSESSION(shp); 6491 NFSUNLOCKSTATE(); 6492 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 6493 } 6494 6495 sep->sess_refcnt--; 6496 if (sep->sess_refcnt > 0) { 6497 NFSUNLOCKSESSION(shp); 6498 NFSUNLOCKSTATE(); 6499 return (NFSERR_BACKCHANBUSY); 6500 } 6501 LIST_REMOVE(sep, sess_hash); 6502 LIST_REMOVE(sep, sess_list); 6503 } 6504 NFSUNLOCKSESSION(shp); 6505 NFSUNLOCKSTATE(); 6506 if (sep == NULL) 6507 return (NFSERR_BADSESSION); 6508 for (i = 0; i < NFSV4_SLOTS; i++) 6509 if (sep->sess_slots[i].nfssl_reply != NULL) 6510 m_freem(sep->sess_slots[i].nfssl_reply); 6511 if (sep->sess_cbsess.nfsess_xprt != NULL) 6512 SVC_RELEASE(sep->sess_cbsess.nfsess_xprt); 6513 free(sep, M_NFSDSESSION); 6514 return (0); 6515 } 6516 6517 /* 6518 * Free a stateid. 6519 * RFC5661 says that it should fail when there are associated opens, locks 6520 * or delegations. Since stateids represent opens, I don't see how you can 6521 * free an open stateid (it will be free'd when closed), so this function 6522 * only works for lock stateids (freeing the lock_owner) or delegations. 6523 */ 6524 int 6525 nfsrv_freestateid(struct nfsrv_descript *nd, nfsv4stateid_t *stateidp, 6526 NFSPROC_T *p) 6527 { 6528 struct nfsclient *clp; 6529 struct nfsstate *stp; 6530 int error; 6531 6532 NFSLOCKSTATE(); 6533 /* 6534 * Look up the stateid 6535 */ 6536 error = nfsrv_getclient((nfsquad_t)((u_quad_t)0), CLOPS_RENEW, &clp, 6537 NULL, (nfsquad_t)((u_quad_t)0), 0, nd, p); 6538 if (error == 0) { 6539 /* First, check for a delegation. */ 6540 LIST_FOREACH(stp, &clp->lc_deleg, ls_list) { 6541 if (!NFSBCMP(stp->ls_stateid.other, stateidp->other, 6542 NFSX_STATEIDOTHER)) 6543 break; 6544 } 6545 if (stp != NULL) { 6546 nfsrv_freedeleg(stp); 6547 NFSUNLOCKSTATE(); 6548 return (error); 6549 } 6550 } 6551 /* Not a delegation, try for a lock_owner. */ 6552 if (error == 0) 6553 error = nfsrv_getstate(clp, stateidp, 0, &stp); 6554 if (error == 0 && ((stp->ls_flags & (NFSLCK_OPEN | NFSLCK_DELEGREAD | 6555 NFSLCK_DELEGWRITE)) != 0 || (stp->ls_flags & NFSLCK_LOCK) == 0)) 6556 /* Not a lock_owner stateid. */ 6557 error = NFSERR_LOCKSHELD; 6558 if (error == 0 && !LIST_EMPTY(&stp->ls_lock)) 6559 error = NFSERR_LOCKSHELD; 6560 if (error == 0) 6561 nfsrv_freelockowner(stp, NULL, 0, p); 6562 NFSUNLOCKSTATE(); 6563 return (error); 6564 } 6565 6566 /* 6567 * Test a stateid. 6568 */ 6569 int 6570 nfsrv_teststateid(struct nfsrv_descript *nd, nfsv4stateid_t *stateidp, 6571 NFSPROC_T *p) 6572 { 6573 struct nfsclient *clp; 6574 struct nfsstate *stp; 6575 int error; 6576 6577 NFSLOCKSTATE(); 6578 /* 6579 * Look up the stateid 6580 */ 6581 error = nfsrv_getclient((nfsquad_t)((u_quad_t)0), CLOPS_RENEW, &clp, 6582 NULL, (nfsquad_t)((u_quad_t)0), 0, nd, p); 6583 if (error == 0) 6584 error = nfsrv_getstate(clp, stateidp, 0, &stp); 6585 if (error == 0 && stateidp->seqid != 0 && 6586 SEQ_LT(stateidp->seqid, stp->ls_stateid.seqid)) 6587 error = NFSERR_OLDSTATEID; 6588 NFSUNLOCKSTATE(); 6589 return (error); 6590 } 6591 6592 /* 6593 * Generate the xdr for an NFSv4.1 CBSequence Operation. 6594 */ 6595 static int 6596 nfsv4_setcbsequence(struct nfsrv_descript *nd, struct nfsclient *clp, 6597 int dont_replycache, struct nfsdsession **sepp, int *slotposp) 6598 { 6599 struct nfsdsession *sep; 6600 uint32_t *tl, slotseq = 0; 6601 int maxslot; 6602 uint8_t sessionid[NFSX_V4SESSIONID]; 6603 int error; 6604 6605 error = nfsv4_getcbsession(clp, sepp); 6606 if (error != 0) 6607 return (error); 6608 sep = *sepp; 6609 nfsv4_sequencelookup(NULL, &sep->sess_cbsess, slotposp, &maxslot, 6610 &slotseq, sessionid, true); 6611 KASSERT(maxslot >= 0, ("nfsv4_setcbsequence neg maxslot")); 6612 6613 /* Build the Sequence arguments. */ 6614 NFSM_BUILD(tl, uint32_t *, NFSX_V4SESSIONID + 5 * NFSX_UNSIGNED); 6615 bcopy(sessionid, tl, NFSX_V4SESSIONID); 6616 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED; 6617 nd->nd_slotseq = tl; 6618 nd->nd_slotid = *slotposp; 6619 nd->nd_flag |= ND_HASSLOTID; 6620 *tl++ = txdr_unsigned(slotseq); 6621 *tl++ = txdr_unsigned(*slotposp); 6622 *tl++ = txdr_unsigned(maxslot); 6623 if (dont_replycache == 0) 6624 *tl++ = newnfs_true; 6625 else 6626 *tl++ = newnfs_false; 6627 *tl = 0; /* No referring call list, for now. */ 6628 nd->nd_flag |= ND_HASSEQUENCE; 6629 return (0); 6630 } 6631 6632 /* 6633 * Get a session for the callback. 6634 */ 6635 static int 6636 nfsv4_getcbsession(struct nfsclient *clp, struct nfsdsession **sepp) 6637 { 6638 struct nfsdsession *sep; 6639 6640 NFSLOCKSTATE(); 6641 LIST_FOREACH(sep, &clp->lc_session, sess_list) { 6642 if ((sep->sess_crflags & NFSV4CRSESS_CONNBACKCHAN) != 0) 6643 break; 6644 } 6645 if (sep == NULL) { 6646 NFSUNLOCKSTATE(); 6647 return (NFSERR_BADSESSION); 6648 } 6649 sep->sess_refcnt++; 6650 *sepp = sep; 6651 NFSUNLOCKSTATE(); 6652 return (0); 6653 } 6654 6655 /* 6656 * Free up all backchannel xprts. This needs to be done when the nfsd threads 6657 * exit, since those transports will all be going away. 6658 * This is only called after all the nfsd threads are done performing RPCs, 6659 * so locking shouldn't be an issue. 6660 */ 6661 void 6662 nfsrv_freeallbackchannel_xprts(void) 6663 { 6664 struct nfsdsession *sep; 6665 struct nfsclient *clp; 6666 SVCXPRT *xprt; 6667 int i; 6668 6669 for (i = 0; i < nfsrv_clienthashsize; i++) { 6670 LIST_FOREACH(clp, &NFSD_VNET(nfsclienthash)[i], lc_hash) { 6671 LIST_FOREACH(sep, &clp->lc_session, sess_list) { 6672 xprt = sep->sess_cbsess.nfsess_xprt; 6673 sep->sess_cbsess.nfsess_xprt = NULL; 6674 if (xprt != NULL) 6675 SVC_RELEASE(xprt); 6676 } 6677 } 6678 } 6679 } 6680 6681 /* 6682 * Do a layout commit. Actually just call nfsrv_updatemdsattr(). 6683 * I have no idea if the rest of these arguments will ever be useful? 6684 */ 6685 int 6686 nfsrv_layoutcommit(struct nfsrv_descript *nd, vnode_t vp, int layouttype, 6687 int hasnewoff, uint64_t newoff, uint64_t offset, uint64_t len, 6688 int hasnewmtime, struct timespec *newmtimep, int reclaim, 6689 nfsv4stateid_t *stateidp, int maxcnt, char *layp, int *hasnewsizep, 6690 uint64_t *newsizep, struct ucred *cred, NFSPROC_T *p) 6691 { 6692 struct nfsvattr na; 6693 int error; 6694 6695 error = nfsrv_updatemdsattr(vp, &na, p); 6696 if (error == 0) { 6697 *hasnewsizep = 1; 6698 *newsizep = na.na_size; 6699 } 6700 return (error); 6701 } 6702 6703 /* 6704 * Try and get a layout. 6705 */ 6706 int 6707 nfsrv_layoutget(struct nfsrv_descript *nd, vnode_t vp, struct nfsexstuff *exp, 6708 int layouttype, int *iomode, uint64_t *offset, uint64_t *len, 6709 uint64_t minlen, nfsv4stateid_t *stateidp, int maxcnt, int *retonclose, 6710 int *layoutlenp, char *layp, struct ucred *cred, NFSPROC_T *p) 6711 { 6712 struct nfslayouthash *lhyp; 6713 struct nfslayout *lyp; 6714 char *devid; 6715 fhandle_t fh, *dsfhp; 6716 int error, mirrorcnt; 6717 6718 if (nfsrv_devidcnt == 0) 6719 return (NFSERR_UNKNLAYOUTTYPE); 6720 6721 if (*offset != 0) 6722 printf("nfsrv_layoutget: off=%ju len=%ju\n", (uintmax_t)*offset, 6723 (uintmax_t)*len); 6724 error = nfsvno_getfh(vp, &fh, p); 6725 NFSD_DEBUG(4, "layoutget getfh=%d\n", error); 6726 if (error != 0) 6727 return (error); 6728 6729 /* 6730 * For now, all layouts are for entire files. 6731 * Only issue Read/Write layouts if requested for a non-readonly fs. 6732 */ 6733 if (NFSVNO_EXRDONLY(exp)) { 6734 if (*iomode == NFSLAYOUTIOMODE_RW) 6735 return (NFSERR_LAYOUTTRYLATER); 6736 *iomode = NFSLAYOUTIOMODE_READ; 6737 } 6738 if (*iomode != NFSLAYOUTIOMODE_RW) 6739 *iomode = NFSLAYOUTIOMODE_READ; 6740 6741 /* 6742 * Check to see if a write layout can be issued for this file. 6743 * This is used during mirror recovery to avoid RW layouts being 6744 * issued for a file while it is being copied to the recovered 6745 * mirror. 6746 */ 6747 if (*iomode == NFSLAYOUTIOMODE_RW && nfsrv_dontlayout(&fh) != 0) 6748 return (NFSERR_LAYOUTTRYLATER); 6749 6750 *retonclose = 0; 6751 *offset = 0; 6752 *len = UINT64_MAX; 6753 6754 /* First, see if a layout already exists and return if found. */ 6755 lhyp = NFSLAYOUTHASH(&fh); 6756 NFSLOCKLAYOUT(lhyp); 6757 error = nfsrv_findlayout(&nd->nd_clientid, &fh, layouttype, p, &lyp); 6758 NFSD_DEBUG(4, "layoutget findlay=%d\n", error); 6759 /* 6760 * Not sure if the seqid must be the same, so I won't check it. 6761 */ 6762 if (error == 0 && (stateidp->other[0] != lyp->lay_stateid.other[0] || 6763 stateidp->other[1] != lyp->lay_stateid.other[1] || 6764 stateidp->other[2] != lyp->lay_stateid.other[2])) { 6765 if ((lyp->lay_flags & NFSLAY_CALLB) == 0) { 6766 NFSUNLOCKLAYOUT(lhyp); 6767 NFSD_DEBUG(1, "ret bad stateid\n"); 6768 return (NFSERR_BADSTATEID); 6769 } 6770 /* 6771 * I believe we get here because there is a race between 6772 * the client processing the CBLAYOUTRECALL and the layout 6773 * being deleted here on the server. 6774 * The client has now done a LayoutGet with a non-layout 6775 * stateid, as it would when there is no layout. 6776 * As such, free this layout and set error == NFSERR_BADSTATEID 6777 * so the code below will create a new layout structure as 6778 * would happen if no layout was found. 6779 * "lyp" will be set before being used below, but set it NULL 6780 * as a safety belt. 6781 */ 6782 nfsrv_freelayout(&lhyp->list, lyp); 6783 lyp = NULL; 6784 error = NFSERR_BADSTATEID; 6785 } 6786 if (error == 0) { 6787 if (lyp->lay_layoutlen > maxcnt) { 6788 NFSUNLOCKLAYOUT(lhyp); 6789 NFSD_DEBUG(1, "ret layout too small\n"); 6790 return (NFSERR_TOOSMALL); 6791 } 6792 if (*iomode == NFSLAYOUTIOMODE_RW) { 6793 if ((lyp->lay_flags & NFSLAY_NOSPC) != 0) { 6794 NFSUNLOCKLAYOUT(lhyp); 6795 NFSD_DEBUG(1, "ret layout nospace\n"); 6796 return (NFSERR_NOSPC); 6797 } 6798 lyp->lay_flags |= NFSLAY_RW; 6799 } else 6800 lyp->lay_flags |= NFSLAY_READ; 6801 NFSBCOPY(lyp->lay_xdr, layp, lyp->lay_layoutlen); 6802 *layoutlenp = lyp->lay_layoutlen; 6803 if (++lyp->lay_stateid.seqid == 0) 6804 lyp->lay_stateid.seqid = 1; 6805 stateidp->seqid = lyp->lay_stateid.seqid; 6806 NFSUNLOCKLAYOUT(lhyp); 6807 NFSD_DEBUG(4, "ret fnd layout\n"); 6808 return (0); 6809 } 6810 NFSUNLOCKLAYOUT(lhyp); 6811 6812 /* Find the device id and file handle. */ 6813 dsfhp = malloc(sizeof(fhandle_t) * NFSDEV_MAXMIRRORS, M_TEMP, M_WAITOK); 6814 devid = malloc(NFSX_V4DEVICEID * NFSDEV_MAXMIRRORS, M_TEMP, M_WAITOK); 6815 error = nfsrv_dsgetdevandfh(vp, p, &mirrorcnt, dsfhp, devid); 6816 NFSD_DEBUG(4, "layoutget devandfh=%d\n", error); 6817 if (error == 0) { 6818 if (layouttype == NFSLAYOUT_NFSV4_1_FILES) { 6819 if (NFSX_V4FILELAYOUT > maxcnt) 6820 error = NFSERR_TOOSMALL; 6821 else 6822 lyp = nfsrv_filelayout(nd, *iomode, &fh, dsfhp, 6823 devid, vp->v_mount->mnt_stat.f_fsid); 6824 } else { 6825 if (NFSX_V4FLEXLAYOUT(mirrorcnt) > maxcnt) 6826 error = NFSERR_TOOSMALL; 6827 else 6828 lyp = nfsrv_flexlayout(nd, *iomode, mirrorcnt, 6829 &fh, dsfhp, devid, 6830 vp->v_mount->mnt_stat.f_fsid); 6831 } 6832 } 6833 free(dsfhp, M_TEMP); 6834 free(devid, M_TEMP); 6835 if (error != 0) 6836 return (error); 6837 6838 /* 6839 * Now, add this layout to the list. 6840 */ 6841 error = nfsrv_addlayout(nd, &lyp, stateidp, layp, layoutlenp, p); 6842 NFSD_DEBUG(4, "layoutget addl=%d\n", error); 6843 /* 6844 * The lyp will be set to NULL by nfsrv_addlayout() if it 6845 * linked the new structure into the lists. 6846 */ 6847 free(lyp, M_NFSDSTATE); 6848 return (error); 6849 } 6850 6851 /* 6852 * Generate a File Layout. 6853 */ 6854 static struct nfslayout * 6855 nfsrv_filelayout(struct nfsrv_descript *nd, int iomode, fhandle_t *fhp, 6856 fhandle_t *dsfhp, char *devid, fsid_t fs) 6857 { 6858 uint32_t *tl; 6859 struct nfslayout *lyp; 6860 uint64_t pattern_offset; 6861 6862 lyp = malloc(sizeof(struct nfslayout) + NFSX_V4FILELAYOUT, M_NFSDSTATE, 6863 M_WAITOK | M_ZERO); 6864 lyp->lay_type = NFSLAYOUT_NFSV4_1_FILES; 6865 if (iomode == NFSLAYOUTIOMODE_RW) 6866 lyp->lay_flags = NFSLAY_RW; 6867 else 6868 lyp->lay_flags = NFSLAY_READ; 6869 NFSBCOPY(fhp, &lyp->lay_fh, sizeof(*fhp)); 6870 lyp->lay_clientid.qval = nd->nd_clientid.qval; 6871 lyp->lay_fsid = fs; 6872 NFSBCOPY(devid, lyp->lay_deviceid, NFSX_V4DEVICEID); 6873 6874 /* Fill in the xdr for the files layout. */ 6875 tl = (uint32_t *)lyp->lay_xdr; 6876 NFSBCOPY(devid, tl, NFSX_V4DEVICEID); /* Device ID. */ 6877 tl += (NFSX_V4DEVICEID / NFSX_UNSIGNED); 6878 6879 /* Set the stripe size to the maximum I/O size. */ 6880 *tl++ = txdr_unsigned(nfs_srvmaxio & NFSFLAYUTIL_STRIPE_MASK); 6881 *tl++ = 0; /* 1st stripe index. */ 6882 pattern_offset = 0; 6883 txdr_hyper(pattern_offset, tl); tl += 2; /* Pattern offset. */ 6884 *tl++ = txdr_unsigned(1); /* 1 file handle. */ 6885 *tl++ = txdr_unsigned(NFSX_V4PNFSFH); 6886 NFSBCOPY(dsfhp, tl, sizeof(*dsfhp)); 6887 lyp->lay_layoutlen = NFSX_V4FILELAYOUT; 6888 return (lyp); 6889 } 6890 6891 #define FLEX_OWNERID "999" 6892 #define FLEX_UID0 "0" 6893 /* 6894 * Generate a Flex File Layout. 6895 * The FLEX_OWNERID can be any string of 3 decimal digits. Although this 6896 * string goes on the wire, it isn't supposed to be used by the client, 6897 * since this server uses tight coupling. 6898 * Although not recommended by the spec., if vfs.nfsd.flexlinuxhack=1 use 6899 * a string of "0". This works around the Linux Flex File Layout driver bug 6900 * which uses the synthetic uid/gid strings for the "tightly coupled" case. 6901 */ 6902 static struct nfslayout * 6903 nfsrv_flexlayout(struct nfsrv_descript *nd, int iomode, int mirrorcnt, 6904 fhandle_t *fhp, fhandle_t *dsfhp, char *devid, fsid_t fs) 6905 { 6906 uint32_t *tl; 6907 struct nfslayout *lyp; 6908 uint64_t lenval; 6909 int i; 6910 6911 lyp = malloc(sizeof(struct nfslayout) + NFSX_V4FLEXLAYOUT(mirrorcnt), 6912 M_NFSDSTATE, M_WAITOK | M_ZERO); 6913 lyp->lay_type = NFSLAYOUT_FLEXFILE; 6914 if (iomode == NFSLAYOUTIOMODE_RW) 6915 lyp->lay_flags = NFSLAY_RW; 6916 else 6917 lyp->lay_flags = NFSLAY_READ; 6918 NFSBCOPY(fhp, &lyp->lay_fh, sizeof(*fhp)); 6919 lyp->lay_clientid.qval = nd->nd_clientid.qval; 6920 lyp->lay_fsid = fs; 6921 lyp->lay_mirrorcnt = mirrorcnt; 6922 NFSBCOPY(devid, lyp->lay_deviceid, NFSX_V4DEVICEID); 6923 6924 /* Fill in the xdr for the files layout. */ 6925 tl = (uint32_t *)lyp->lay_xdr; 6926 lenval = 0; 6927 txdr_hyper(lenval, tl); tl += 2; /* Stripe unit. */ 6928 *tl++ = txdr_unsigned(mirrorcnt); /* # of mirrors. */ 6929 for (i = 0; i < mirrorcnt; i++) { 6930 *tl++ = txdr_unsigned(1); /* One stripe. */ 6931 NFSBCOPY(devid, tl, NFSX_V4DEVICEID); /* Device ID. */ 6932 tl += (NFSX_V4DEVICEID / NFSX_UNSIGNED); 6933 devid += NFSX_V4DEVICEID; 6934 *tl++ = txdr_unsigned(1); /* Efficiency. */ 6935 *tl++ = 0; /* Proxy Stateid. */ 6936 *tl++ = 0x55555555; 6937 *tl++ = 0x55555555; 6938 *tl++ = 0x55555555; 6939 *tl++ = txdr_unsigned(1); /* 1 file handle. */ 6940 *tl++ = txdr_unsigned(NFSX_V4PNFSFH); 6941 NFSBCOPY(dsfhp, tl, sizeof(*dsfhp)); 6942 tl += (NFSM_RNDUP(NFSX_V4PNFSFH) / NFSX_UNSIGNED); 6943 dsfhp++; 6944 if (nfsrv_flexlinuxhack != 0) { 6945 *tl++ = txdr_unsigned(strlen(FLEX_UID0)); 6946 *tl = 0; /* 0 pad string. */ 6947 NFSBCOPY(FLEX_UID0, tl++, strlen(FLEX_UID0)); 6948 *tl++ = txdr_unsigned(strlen(FLEX_UID0)); 6949 *tl = 0; /* 0 pad string. */ 6950 NFSBCOPY(FLEX_UID0, tl++, strlen(FLEX_UID0)); 6951 } else { 6952 *tl++ = txdr_unsigned(strlen(FLEX_OWNERID)); 6953 NFSBCOPY(FLEX_OWNERID, tl++, NFSX_UNSIGNED); 6954 *tl++ = txdr_unsigned(strlen(FLEX_OWNERID)); 6955 NFSBCOPY(FLEX_OWNERID, tl++, NFSX_UNSIGNED); 6956 } 6957 } 6958 *tl++ = txdr_unsigned(0); /* ff_flags. */ 6959 *tl = txdr_unsigned(60); /* Status interval hint. */ 6960 lyp->lay_layoutlen = NFSX_V4FLEXLAYOUT(mirrorcnt); 6961 return (lyp); 6962 } 6963 6964 /* 6965 * Parse and process Flex File errors returned via LayoutReturn. 6966 */ 6967 static void 6968 nfsrv_flexlayouterr(struct nfsrv_descript *nd, uint32_t *layp, int maxcnt, 6969 NFSPROC_T *p) 6970 { 6971 uint32_t *tl; 6972 int cnt, errcnt, i, j, opnum, stat; 6973 char devid[NFSX_V4DEVICEID]; 6974 6975 tl = layp; 6976 maxcnt -= NFSX_UNSIGNED; 6977 if (maxcnt > 0) 6978 cnt = fxdr_unsigned(int, *tl++); 6979 else 6980 cnt = 0; 6981 NFSD_DEBUG(4, "flexlayouterr cnt=%d\n", cnt); 6982 for (i = 0; i < cnt; i++) { 6983 maxcnt -= NFSX_STATEID + 2 * NFSX_HYPER + 6984 NFSX_UNSIGNED; 6985 if (maxcnt <= 0) 6986 break; 6987 /* Skip offset, length and stateid for now. */ 6988 tl += (4 + NFSX_STATEID / NFSX_UNSIGNED); 6989 errcnt = fxdr_unsigned(int, *tl++); 6990 NFSD_DEBUG(4, "flexlayouterr errcnt=%d\n", errcnt); 6991 for (j = 0; j < errcnt; j++) { 6992 maxcnt -= NFSX_V4DEVICEID + 2 * NFSX_UNSIGNED; 6993 if (maxcnt < 0) 6994 break; 6995 NFSBCOPY(tl, devid, NFSX_V4DEVICEID); 6996 tl += (NFSX_V4DEVICEID / NFSX_UNSIGNED); 6997 stat = fxdr_unsigned(int, *tl++); 6998 opnum = fxdr_unsigned(int, *tl++); 6999 NFSD_DEBUG(4, "flexlayouterr op=%d stat=%d\n", opnum, 7000 stat); 7001 /* 7002 * Except for NFSERR_ACCES, NFSERR_STALE and 7003 * NFSERR_NOSPC errors, disable the mirror. 7004 */ 7005 if (stat != NFSERR_ACCES && stat != NFSERR_STALE && 7006 stat != NFSERR_NOSPC) 7007 nfsrv_delds(devid, p); 7008 7009 /* For NFSERR_NOSPC, mark all devids and layouts. */ 7010 if (stat == NFSERR_NOSPC) 7011 nfsrv_marknospc(devid, true); 7012 } 7013 } 7014 } 7015 7016 /* 7017 * This function removes all flex file layouts which has a mirror with 7018 * a device id that matches the argument. 7019 * Called when the DS represented by the device id has failed. 7020 */ 7021 void 7022 nfsrv_flexmirrordel(char *devid, NFSPROC_T *p) 7023 { 7024 uint32_t *tl; 7025 struct nfslayout *lyp, *nlyp; 7026 struct nfslayouthash *lhyp; 7027 struct nfslayouthead loclyp; 7028 int i, j; 7029 7030 NFSD_DEBUG(4, "flexmirrordel\n"); 7031 /* Move all layouts found onto a local list. */ 7032 TAILQ_INIT(&loclyp); 7033 for (i = 0; i < nfsrv_layouthashsize; i++) { 7034 lhyp = &nfslayouthash[i]; 7035 NFSLOCKLAYOUT(lhyp); 7036 TAILQ_FOREACH_SAFE(lyp, &lhyp->list, lay_list, nlyp) { 7037 if (lyp->lay_type == NFSLAYOUT_FLEXFILE && 7038 lyp->lay_mirrorcnt > 1) { 7039 NFSD_DEBUG(4, "possible match\n"); 7040 tl = lyp->lay_xdr; 7041 tl += 3; 7042 for (j = 0; j < lyp->lay_mirrorcnt; j++) { 7043 tl++; 7044 if (NFSBCMP(devid, tl, NFSX_V4DEVICEID) 7045 == 0) { 7046 /* Found one. */ 7047 NFSD_DEBUG(4, "fnd one\n"); 7048 TAILQ_REMOVE(&lhyp->list, lyp, 7049 lay_list); 7050 TAILQ_INSERT_HEAD(&loclyp, lyp, 7051 lay_list); 7052 break; 7053 } 7054 tl += (NFSX_V4DEVICEID / NFSX_UNSIGNED + 7055 NFSM_RNDUP(NFSX_V4PNFSFH) / 7056 NFSX_UNSIGNED + 11 * NFSX_UNSIGNED); 7057 } 7058 } 7059 } 7060 NFSUNLOCKLAYOUT(lhyp); 7061 } 7062 7063 /* Now, try to do a Layout recall for each one found. */ 7064 TAILQ_FOREACH_SAFE(lyp, &loclyp, lay_list, nlyp) { 7065 NFSD_DEBUG(4, "do layout recall\n"); 7066 /* 7067 * The layout stateid.seqid needs to be incremented 7068 * before doing a LAYOUT_RECALL callback. 7069 */ 7070 if (++lyp->lay_stateid.seqid == 0) 7071 lyp->lay_stateid.seqid = 1; 7072 nfsrv_recalllayout(lyp->lay_clientid, &lyp->lay_stateid, 7073 &lyp->lay_fh, lyp, 1, lyp->lay_type, p); 7074 nfsrv_freelayout(&loclyp, lyp); 7075 } 7076 } 7077 7078 /* 7079 * Do a recall callback to the client for this layout. 7080 */ 7081 static int 7082 nfsrv_recalllayout(nfsquad_t clid, nfsv4stateid_t *stateidp, fhandle_t *fhp, 7083 struct nfslayout *lyp, int changed, int laytype, NFSPROC_T *p) 7084 { 7085 struct nfsclient *clp; 7086 int error; 7087 7088 NFSD_DEBUG(4, "nfsrv_recalllayout\n"); 7089 error = nfsrv_getclient(clid, 0, &clp, NULL, (nfsquad_t)((u_quad_t)0), 7090 0, NULL, p); 7091 NFSD_DEBUG(4, "aft nfsrv_getclient=%d\n", error); 7092 if (error != 0) { 7093 printf("nfsrv_recalllayout: getclient err=%d\n", error); 7094 return (error); 7095 } 7096 if ((clp->lc_flags & LCL_NFSV41) != 0) { 7097 error = nfsrv_docallback(clp, NFSV4OP_CBLAYOUTRECALL, 7098 stateidp, changed, fhp, NULL, NULL, laytype, p); 7099 /* If lyp != NULL, handle an error return here. */ 7100 if (error != 0 && lyp != NULL) { 7101 NFSDRECALLLOCK(); 7102 /* 7103 * Mark it returned, since no layout recall 7104 * has been done. 7105 * All errors seem to be non-recoverable, although 7106 * NFSERR_NOMATCHLAYOUT is a normal event. 7107 */ 7108 if ((lyp->lay_flags & NFSLAY_RECALL) != 0) { 7109 lyp->lay_flags |= NFSLAY_RETURNED; 7110 wakeup(lyp); 7111 } 7112 NFSDRECALLUNLOCK(); 7113 if (error != NFSERR_NOMATCHLAYOUT) 7114 printf("nfsrv_recalllayout: err=%d\n", error); 7115 } 7116 } else 7117 printf("nfsrv_recalllayout: clp not NFSv4.1\n"); 7118 return (error); 7119 } 7120 7121 /* 7122 * Find a layout to recall when we exceed our high water mark. 7123 */ 7124 void 7125 nfsrv_recalloldlayout(NFSPROC_T *p) 7126 { 7127 struct nfslayouthash *lhyp; 7128 struct nfslayout *lyp; 7129 nfsquad_t clientid; 7130 nfsv4stateid_t stateid; 7131 fhandle_t fh; 7132 int error, laytype = 0, ret; 7133 7134 lhyp = &nfslayouthash[arc4random() % nfsrv_layouthashsize]; 7135 NFSLOCKLAYOUT(lhyp); 7136 TAILQ_FOREACH_REVERSE(lyp, &lhyp->list, nfslayouthead, lay_list) { 7137 if ((lyp->lay_flags & NFSLAY_CALLB) == 0) { 7138 lyp->lay_flags |= NFSLAY_CALLB; 7139 /* 7140 * The layout stateid.seqid needs to be incremented 7141 * before doing a LAYOUT_RECALL callback. 7142 */ 7143 if (++lyp->lay_stateid.seqid == 0) 7144 lyp->lay_stateid.seqid = 1; 7145 clientid = lyp->lay_clientid; 7146 stateid = lyp->lay_stateid; 7147 NFSBCOPY(&lyp->lay_fh, &fh, sizeof(fh)); 7148 laytype = lyp->lay_type; 7149 break; 7150 } 7151 } 7152 NFSUNLOCKLAYOUT(lhyp); 7153 if (lyp != NULL) { 7154 error = nfsrv_recalllayout(clientid, &stateid, &fh, NULL, 0, 7155 laytype, p); 7156 if (error != 0 && error != NFSERR_NOMATCHLAYOUT) 7157 NFSD_DEBUG(4, "recallold=%d\n", error); 7158 if (error != 0) { 7159 NFSLOCKLAYOUT(lhyp); 7160 /* 7161 * Since the hash list was unlocked, we need to 7162 * find it again. 7163 */ 7164 ret = nfsrv_findlayout(&clientid, &fh, laytype, p, 7165 &lyp); 7166 if (ret == 0 && 7167 (lyp->lay_flags & NFSLAY_CALLB) != 0 && 7168 lyp->lay_stateid.other[0] == stateid.other[0] && 7169 lyp->lay_stateid.other[1] == stateid.other[1] && 7170 lyp->lay_stateid.other[2] == stateid.other[2]) { 7171 /* 7172 * The client no longer knows this layout, so 7173 * it can be free'd now. 7174 */ 7175 if (error == NFSERR_NOMATCHLAYOUT) 7176 nfsrv_freelayout(&lhyp->list, lyp); 7177 else { 7178 /* 7179 * Leave it to be tried later by 7180 * clearing NFSLAY_CALLB and moving 7181 * it to the head of the list, so it 7182 * won't be tried again for a while. 7183 */ 7184 lyp->lay_flags &= ~NFSLAY_CALLB; 7185 TAILQ_REMOVE(&lhyp->list, lyp, 7186 lay_list); 7187 TAILQ_INSERT_HEAD(&lhyp->list, lyp, 7188 lay_list); 7189 } 7190 } 7191 NFSUNLOCKLAYOUT(lhyp); 7192 } 7193 } 7194 } 7195 7196 /* 7197 * Try and return layout(s). 7198 */ 7199 int 7200 nfsrv_layoutreturn(struct nfsrv_descript *nd, vnode_t vp, 7201 int layouttype, int iomode, uint64_t offset, uint64_t len, int reclaim, 7202 int kind, nfsv4stateid_t *stateidp, int maxcnt, uint32_t *layp, int *fndp, 7203 struct ucred *cred, NFSPROC_T *p) 7204 { 7205 struct nfsvattr na; 7206 struct nfslayouthash *lhyp; 7207 struct nfslayout *lyp; 7208 fhandle_t fh; 7209 int error = 0; 7210 7211 *fndp = 0; 7212 if (kind == NFSV4LAYOUTRET_FILE) { 7213 error = nfsvno_getfh(vp, &fh, p); 7214 if (error == 0) { 7215 error = nfsrv_updatemdsattr(vp, &na, p); 7216 if (error != 0) 7217 printf("nfsrv_layoutreturn: updatemdsattr" 7218 " failed=%d\n", error); 7219 } 7220 if (error == 0) { 7221 if (reclaim == newnfs_true) { 7222 error = nfsrv_checkgrace(NULL, NULL, 7223 NFSLCK_RECLAIM); 7224 if (error != NFSERR_NOGRACE) 7225 error = 0; 7226 return (error); 7227 } 7228 lhyp = NFSLAYOUTHASH(&fh); 7229 NFSDRECALLLOCK(); 7230 NFSLOCKLAYOUT(lhyp); 7231 error = nfsrv_findlayout(&nd->nd_clientid, &fh, 7232 layouttype, p, &lyp); 7233 NFSD_DEBUG(4, "layoutret findlay=%d\n", error); 7234 if (error == 0 && 7235 stateidp->other[0] == lyp->lay_stateid.other[0] && 7236 stateidp->other[1] == lyp->lay_stateid.other[1] && 7237 stateidp->other[2] == lyp->lay_stateid.other[2]) { 7238 NFSD_DEBUG(4, "nfsrv_layoutreturn: stateid %d" 7239 " %x %x %x laystateid %d %x %x %x" 7240 " off=%ju len=%ju flgs=0x%x\n", 7241 stateidp->seqid, stateidp->other[0], 7242 stateidp->other[1], stateidp->other[2], 7243 lyp->lay_stateid.seqid, 7244 lyp->lay_stateid.other[0], 7245 lyp->lay_stateid.other[1], 7246 lyp->lay_stateid.other[2], 7247 (uintmax_t)offset, (uintmax_t)len, 7248 lyp->lay_flags); 7249 if (++lyp->lay_stateid.seqid == 0) 7250 lyp->lay_stateid.seqid = 1; 7251 stateidp->seqid = lyp->lay_stateid.seqid; 7252 if (offset == 0 && len == UINT64_MAX) { 7253 if ((iomode & NFSLAYOUTIOMODE_READ) != 7254 0) 7255 lyp->lay_flags &= ~NFSLAY_READ; 7256 if ((iomode & NFSLAYOUTIOMODE_RW) != 0) 7257 lyp->lay_flags &= ~NFSLAY_RW; 7258 if ((lyp->lay_flags & (NFSLAY_READ | 7259 NFSLAY_RW)) == 0) 7260 nfsrv_freelayout(&lhyp->list, 7261 lyp); 7262 else 7263 *fndp = 1; 7264 } else 7265 *fndp = 1; 7266 } 7267 NFSUNLOCKLAYOUT(lhyp); 7268 /* Search the nfsrv_recalllist for a match. */ 7269 TAILQ_FOREACH(lyp, &nfsrv_recalllisthead, lay_list) { 7270 if (NFSBCMP(&lyp->lay_fh, &fh, 7271 sizeof(fh)) == 0 && 7272 lyp->lay_clientid.qval == 7273 nd->nd_clientid.qval && 7274 stateidp->other[0] == 7275 lyp->lay_stateid.other[0] && 7276 stateidp->other[1] == 7277 lyp->lay_stateid.other[1] && 7278 stateidp->other[2] == 7279 lyp->lay_stateid.other[2]) { 7280 lyp->lay_flags |= NFSLAY_RETURNED; 7281 wakeup(lyp); 7282 error = 0; 7283 } 7284 } 7285 NFSDRECALLUNLOCK(); 7286 } 7287 if (layouttype == NFSLAYOUT_FLEXFILE && layp != NULL) 7288 nfsrv_flexlayouterr(nd, layp, maxcnt, p); 7289 } else if (kind == NFSV4LAYOUTRET_FSID) 7290 nfsrv_freelayouts(&nd->nd_clientid, 7291 &vp->v_mount->mnt_stat.f_fsid, layouttype, iomode); 7292 else if (kind == NFSV4LAYOUTRET_ALL) 7293 nfsrv_freelayouts(&nd->nd_clientid, NULL, layouttype, iomode); 7294 else 7295 error = NFSERR_INVAL; 7296 if (error == -1) 7297 error = 0; 7298 return (error); 7299 } 7300 7301 /* 7302 * Look for an existing layout. 7303 */ 7304 static int 7305 nfsrv_findlayout(nfsquad_t *clientidp, fhandle_t *fhp, int laytype, 7306 NFSPROC_T *p, struct nfslayout **lypp) 7307 { 7308 struct nfslayouthash *lhyp; 7309 struct nfslayout *lyp; 7310 int ret; 7311 7312 *lypp = NULL; 7313 ret = 0; 7314 lhyp = NFSLAYOUTHASH(fhp); 7315 TAILQ_FOREACH(lyp, &lhyp->list, lay_list) { 7316 if (NFSBCMP(&lyp->lay_fh, fhp, sizeof(*fhp)) == 0 && 7317 lyp->lay_clientid.qval == clientidp->qval && 7318 lyp->lay_type == laytype) 7319 break; 7320 } 7321 if (lyp != NULL) 7322 *lypp = lyp; 7323 else 7324 ret = -1; 7325 return (ret); 7326 } 7327 7328 /* 7329 * Add the new layout, as required. 7330 */ 7331 static int 7332 nfsrv_addlayout(struct nfsrv_descript *nd, struct nfslayout **lypp, 7333 nfsv4stateid_t *stateidp, char *layp, int *layoutlenp, NFSPROC_T *p) 7334 { 7335 struct nfsclient *clp; 7336 struct nfslayouthash *lhyp; 7337 struct nfslayout *lyp, *nlyp; 7338 fhandle_t *fhp; 7339 int error; 7340 7341 KASSERT((nd->nd_flag & ND_IMPLIEDCLID) != 0, 7342 ("nfsrv_layoutget: no nd_clientid\n")); 7343 lyp = *lypp; 7344 fhp = &lyp->lay_fh; 7345 NFSLOCKSTATE(); 7346 error = nfsrv_getclient((nfsquad_t)((u_quad_t)0), CLOPS_RENEW, &clp, 7347 NULL, (nfsquad_t)((u_quad_t)0), 0, nd, p); 7348 if (error != 0) { 7349 NFSUNLOCKSTATE(); 7350 return (error); 7351 } 7352 lyp->lay_stateid.seqid = stateidp->seqid = 1; 7353 lyp->lay_stateid.other[0] = stateidp->other[0] = 7354 clp->lc_clientid.lval[0]; 7355 lyp->lay_stateid.other[1] = stateidp->other[1] = 7356 clp->lc_clientid.lval[1]; 7357 lyp->lay_stateid.other[2] = stateidp->other[2] = 7358 nfsrv_nextstateindex(clp); 7359 NFSUNLOCKSTATE(); 7360 7361 lhyp = NFSLAYOUTHASH(fhp); 7362 NFSLOCKLAYOUT(lhyp); 7363 TAILQ_FOREACH(nlyp, &lhyp->list, lay_list) { 7364 if (NFSBCMP(&nlyp->lay_fh, fhp, sizeof(*fhp)) == 0 && 7365 nlyp->lay_clientid.qval == nd->nd_clientid.qval) 7366 break; 7367 } 7368 if (nlyp != NULL) { 7369 /* A layout already exists, so use it. */ 7370 nlyp->lay_flags |= (lyp->lay_flags & (NFSLAY_READ | NFSLAY_RW)); 7371 NFSBCOPY(nlyp->lay_xdr, layp, nlyp->lay_layoutlen); 7372 *layoutlenp = nlyp->lay_layoutlen; 7373 if (++nlyp->lay_stateid.seqid == 0) 7374 nlyp->lay_stateid.seqid = 1; 7375 stateidp->seqid = nlyp->lay_stateid.seqid; 7376 stateidp->other[0] = nlyp->lay_stateid.other[0]; 7377 stateidp->other[1] = nlyp->lay_stateid.other[1]; 7378 stateidp->other[2] = nlyp->lay_stateid.other[2]; 7379 NFSUNLOCKLAYOUT(lhyp); 7380 return (0); 7381 } 7382 7383 /* Insert the new layout in the lists. */ 7384 *lypp = NULL; 7385 atomic_add_int(&nfsrv_layoutcnt, 1); 7386 NFSD_VNET(nfsstatsv1_p)->srvlayouts++; 7387 NFSBCOPY(lyp->lay_xdr, layp, lyp->lay_layoutlen); 7388 *layoutlenp = lyp->lay_layoutlen; 7389 TAILQ_INSERT_HEAD(&lhyp->list, lyp, lay_list); 7390 NFSUNLOCKLAYOUT(lhyp); 7391 return (0); 7392 } 7393 7394 /* 7395 * Get the devinfo for a deviceid. 7396 */ 7397 int 7398 nfsrv_getdevinfo(char *devid, int layouttype, uint32_t *maxcnt, 7399 uint32_t *notify, int *devaddrlen, char **devaddr) 7400 { 7401 struct nfsdevice *ds; 7402 7403 if ((layouttype != NFSLAYOUT_NFSV4_1_FILES && layouttype != 7404 NFSLAYOUT_FLEXFILE) || 7405 (nfsrv_maxpnfsmirror > 1 && layouttype == NFSLAYOUT_NFSV4_1_FILES)) 7406 return (NFSERR_UNKNLAYOUTTYPE); 7407 7408 /* 7409 * Now, search for the device id. Note that the structures won't go 7410 * away, but the order changes in the list. As such, the lock only 7411 * needs to be held during the search through the list. 7412 */ 7413 NFSDDSLOCK(); 7414 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 7415 if (NFSBCMP(devid, ds->nfsdev_deviceid, NFSX_V4DEVICEID) == 0 && 7416 ds->nfsdev_nmp != NULL) 7417 break; 7418 } 7419 NFSDDSUNLOCK(); 7420 if (ds == NULL) 7421 return (NFSERR_NOENT); 7422 7423 /* If the correct nfsdev_XXXXaddrlen is > 0, we have the device info. */ 7424 *devaddrlen = 0; 7425 if (layouttype == NFSLAYOUT_NFSV4_1_FILES) { 7426 *devaddrlen = ds->nfsdev_fileaddrlen; 7427 *devaddr = ds->nfsdev_fileaddr; 7428 } else if (layouttype == NFSLAYOUT_FLEXFILE) { 7429 *devaddrlen = ds->nfsdev_flexaddrlen; 7430 *devaddr = ds->nfsdev_flexaddr; 7431 } 7432 if (*devaddrlen == 0) 7433 return (NFSERR_UNKNLAYOUTTYPE); 7434 7435 /* 7436 * The XDR overhead is 3 unsigned values: layout_type, 7437 * length_of_address and notify bitmap. 7438 * If the notify array is changed to not all zeros, the 7439 * count of unsigned values must be increased. 7440 */ 7441 if (*maxcnt > 0 && *maxcnt < NFSM_RNDUP(*devaddrlen) + 7442 3 * NFSX_UNSIGNED) { 7443 *maxcnt = NFSM_RNDUP(*devaddrlen) + 3 * NFSX_UNSIGNED; 7444 return (NFSERR_TOOSMALL); 7445 } 7446 return (0); 7447 } 7448 7449 /* 7450 * Free a list of layout state structures. 7451 */ 7452 static void 7453 nfsrv_freelayoutlist(nfsquad_t clientid) 7454 { 7455 struct nfslayouthash *lhyp; 7456 struct nfslayout *lyp, *nlyp; 7457 int i; 7458 7459 for (i = 0; i < nfsrv_layouthashsize; i++) { 7460 lhyp = &nfslayouthash[i]; 7461 NFSLOCKLAYOUT(lhyp); 7462 TAILQ_FOREACH_SAFE(lyp, &lhyp->list, lay_list, nlyp) { 7463 if (lyp->lay_clientid.qval == clientid.qval) 7464 nfsrv_freelayout(&lhyp->list, lyp); 7465 } 7466 NFSUNLOCKLAYOUT(lhyp); 7467 } 7468 } 7469 7470 /* 7471 * Free up a layout. 7472 */ 7473 static void 7474 nfsrv_freelayout(struct nfslayouthead *lhp, struct nfslayout *lyp) 7475 { 7476 7477 NFSD_DEBUG(4, "Freelayout=%p\n", lyp); 7478 atomic_add_int(&nfsrv_layoutcnt, -1); 7479 NFSD_VNET(nfsstatsv1_p)->srvlayouts--; 7480 TAILQ_REMOVE(lhp, lyp, lay_list); 7481 free(lyp, M_NFSDSTATE); 7482 } 7483 7484 /* 7485 * Free up a device id. 7486 */ 7487 void 7488 nfsrv_freeonedevid(struct nfsdevice *ds) 7489 { 7490 int i; 7491 7492 atomic_add_int(&nfsrv_devidcnt, -1); 7493 vrele(ds->nfsdev_dvp); 7494 for (i = 0; i < nfsrv_dsdirsize; i++) 7495 if (ds->nfsdev_dsdir[i] != NULL) 7496 vrele(ds->nfsdev_dsdir[i]); 7497 free(ds->nfsdev_fileaddr, M_NFSDSTATE); 7498 free(ds->nfsdev_flexaddr, M_NFSDSTATE); 7499 free(ds->nfsdev_host, M_NFSDSTATE); 7500 free(ds, M_NFSDSTATE); 7501 } 7502 7503 /* 7504 * Free up a device id and its mirrors. 7505 */ 7506 static void 7507 nfsrv_freedevid(struct nfsdevice *ds) 7508 { 7509 7510 TAILQ_REMOVE(&nfsrv_devidhead, ds, nfsdev_list); 7511 nfsrv_freeonedevid(ds); 7512 } 7513 7514 /* 7515 * Free all layouts and device ids. 7516 * Done when the nfsd threads are shut down since there may be a new 7517 * modified device id list created when the nfsd is restarted. 7518 */ 7519 void 7520 nfsrv_freealllayoutsanddevids(void) 7521 { 7522 struct nfsdontlist *mrp, *nmrp; 7523 struct nfslayout *lyp, *nlyp; 7524 7525 /* Get rid of the deviceid structures. */ 7526 nfsrv_freealldevids(); 7527 TAILQ_INIT(&nfsrv_devidhead); 7528 nfsrv_devidcnt = 0; 7529 7530 /* Get rid of all layouts. */ 7531 nfsrv_freealllayouts(); 7532 7533 /* Get rid of any nfsdontlist entries. */ 7534 LIST_FOREACH_SAFE(mrp, &nfsrv_dontlisthead, nfsmr_list, nmrp) 7535 free(mrp, M_NFSDSTATE); 7536 LIST_INIT(&nfsrv_dontlisthead); 7537 nfsrv_dontlistlen = 0; 7538 7539 /* Free layouts in the recall list. */ 7540 TAILQ_FOREACH_SAFE(lyp, &nfsrv_recalllisthead, lay_list, nlyp) 7541 nfsrv_freelayout(&nfsrv_recalllisthead, lyp); 7542 TAILQ_INIT(&nfsrv_recalllisthead); 7543 } 7544 7545 /* 7546 * Free layouts that match the arguments. 7547 */ 7548 static void 7549 nfsrv_freelayouts(nfsquad_t *clid, fsid_t *fs, int laytype, int iomode) 7550 { 7551 struct nfslayouthash *lhyp; 7552 struct nfslayout *lyp, *nlyp; 7553 int i; 7554 7555 for (i = 0; i < nfsrv_layouthashsize; i++) { 7556 lhyp = &nfslayouthash[i]; 7557 NFSLOCKLAYOUT(lhyp); 7558 TAILQ_FOREACH_SAFE(lyp, &lhyp->list, lay_list, nlyp) { 7559 if (clid->qval != lyp->lay_clientid.qval) 7560 continue; 7561 if (fs != NULL && fsidcmp(fs, &lyp->lay_fsid) != 0) 7562 continue; 7563 if (laytype != lyp->lay_type) 7564 continue; 7565 if ((iomode & NFSLAYOUTIOMODE_READ) != 0) 7566 lyp->lay_flags &= ~NFSLAY_READ; 7567 if ((iomode & NFSLAYOUTIOMODE_RW) != 0) 7568 lyp->lay_flags &= ~NFSLAY_RW; 7569 if ((lyp->lay_flags & (NFSLAY_READ | NFSLAY_RW)) == 0) 7570 nfsrv_freelayout(&lhyp->list, lyp); 7571 } 7572 NFSUNLOCKLAYOUT(lhyp); 7573 } 7574 } 7575 7576 /* 7577 * Free all layouts for the argument file. 7578 */ 7579 void 7580 nfsrv_freefilelayouts(fhandle_t *fhp) 7581 { 7582 struct nfslayouthash *lhyp; 7583 struct nfslayout *lyp, *nlyp; 7584 7585 lhyp = NFSLAYOUTHASH(fhp); 7586 NFSLOCKLAYOUT(lhyp); 7587 TAILQ_FOREACH_SAFE(lyp, &lhyp->list, lay_list, nlyp) { 7588 if (NFSBCMP(&lyp->lay_fh, fhp, sizeof(*fhp)) == 0) 7589 nfsrv_freelayout(&lhyp->list, lyp); 7590 } 7591 NFSUNLOCKLAYOUT(lhyp); 7592 } 7593 7594 /* 7595 * Free all layouts. 7596 */ 7597 static void 7598 nfsrv_freealllayouts(void) 7599 { 7600 struct nfslayouthash *lhyp; 7601 struct nfslayout *lyp, *nlyp; 7602 int i; 7603 7604 for (i = 0; i < nfsrv_layouthashsize; i++) { 7605 lhyp = &nfslayouthash[i]; 7606 NFSLOCKLAYOUT(lhyp); 7607 TAILQ_FOREACH_SAFE(lyp, &lhyp->list, lay_list, nlyp) 7608 nfsrv_freelayout(&lhyp->list, lyp); 7609 NFSUNLOCKLAYOUT(lhyp); 7610 } 7611 } 7612 7613 /* 7614 * Look up the mount path for the DS server. 7615 */ 7616 static int 7617 nfsrv_setdsserver(char *dspathp, char *mdspathp, NFSPROC_T *p, 7618 struct nfsdevice **dsp) 7619 { 7620 struct nameidata nd; 7621 struct nfsdevice *ds; 7622 struct mount *mp; 7623 int error, i; 7624 char *dsdirpath; 7625 size_t dsdirsize; 7626 7627 NFSD_DEBUG(4, "setdssrv path=%s\n", dspathp); 7628 *dsp = NULL; 7629 if (jailed(p->td_ucred)) { 7630 printf("A pNFS nfsd cannot run in a jail\n"); 7631 return (EPERM); 7632 } 7633 NDINIT(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF, UIO_SYSSPACE, 7634 dspathp); 7635 error = namei(&nd); 7636 NFSD_DEBUG(4, "lookup=%d\n", error); 7637 if (error != 0) 7638 return (error); 7639 if (nd.ni_vp->v_type != VDIR) { 7640 vput(nd.ni_vp); 7641 NFSD_DEBUG(4, "dspath not dir\n"); 7642 return (ENOTDIR); 7643 } 7644 if (strcmp(nd.ni_vp->v_mount->mnt_vfc->vfc_name, "nfs") != 0) { 7645 vput(nd.ni_vp); 7646 NFSD_DEBUG(4, "dspath not an NFS mount\n"); 7647 return (ENXIO); 7648 } 7649 7650 /* 7651 * Allocate a DS server structure with the NFS mounted directory 7652 * vnode reference counted, so that a non-forced dismount will 7653 * fail with EBUSY. 7654 * This structure is always linked into the list, even if an error 7655 * is being returned. The caller will free the entire list upon 7656 * an error return. 7657 */ 7658 *dsp = ds = malloc(sizeof(*ds) + nfsrv_dsdirsize * sizeof(vnode_t), 7659 M_NFSDSTATE, M_WAITOK | M_ZERO); 7660 ds->nfsdev_dvp = nd.ni_vp; 7661 ds->nfsdev_nmp = VFSTONFS(nd.ni_vp->v_mount); 7662 NFSVOPUNLOCK(nd.ni_vp); 7663 7664 dsdirsize = strlen(dspathp) + 16; 7665 dsdirpath = malloc(dsdirsize, M_TEMP, M_WAITOK); 7666 /* Now, create the DS directory structures. */ 7667 for (i = 0; i < nfsrv_dsdirsize; i++) { 7668 snprintf(dsdirpath, dsdirsize, "%s/ds%d", dspathp, i); 7669 NDINIT(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF, 7670 UIO_SYSSPACE, dsdirpath); 7671 error = namei(&nd); 7672 NFSD_DEBUG(4, "dsdirpath=%s lookup=%d\n", dsdirpath, error); 7673 if (error != 0) 7674 break; 7675 if (nd.ni_vp->v_type != VDIR) { 7676 vput(nd.ni_vp); 7677 error = ENOTDIR; 7678 NFSD_DEBUG(4, "dsdirpath not a VDIR\n"); 7679 break; 7680 } 7681 if (strcmp(nd.ni_vp->v_mount->mnt_vfc->vfc_name, "nfs") != 0) { 7682 vput(nd.ni_vp); 7683 error = ENXIO; 7684 NFSD_DEBUG(4, "dsdirpath not an NFS mount\n"); 7685 break; 7686 } 7687 ds->nfsdev_dsdir[i] = nd.ni_vp; 7688 NFSVOPUNLOCK(nd.ni_vp); 7689 } 7690 free(dsdirpath, M_TEMP); 7691 7692 if (strlen(mdspathp) > 0) { 7693 /* 7694 * This DS stores file for a specific MDS exported file 7695 * system. 7696 */ 7697 NDINIT(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF, 7698 UIO_SYSSPACE, mdspathp); 7699 error = namei(&nd); 7700 NFSD_DEBUG(4, "mds lookup=%d\n", error); 7701 if (error != 0) 7702 goto out; 7703 if (nd.ni_vp->v_type != VDIR) { 7704 vput(nd.ni_vp); 7705 error = ENOTDIR; 7706 NFSD_DEBUG(4, "mdspath not dir\n"); 7707 goto out; 7708 } 7709 mp = nd.ni_vp->v_mount; 7710 if ((mp->mnt_flag & MNT_EXPORTED) == 0) { 7711 vput(nd.ni_vp); 7712 error = ENXIO; 7713 NFSD_DEBUG(4, "mdspath not an exported fs\n"); 7714 goto out; 7715 } 7716 ds->nfsdev_mdsfsid = mp->mnt_stat.f_fsid; 7717 ds->nfsdev_mdsisset = 1; 7718 vput(nd.ni_vp); 7719 } 7720 7721 out: 7722 TAILQ_INSERT_TAIL(&nfsrv_devidhead, ds, nfsdev_list); 7723 atomic_add_int(&nfsrv_devidcnt, 1); 7724 return (error); 7725 } 7726 7727 /* 7728 * Look up the mount path for the DS server and delete it. 7729 */ 7730 int 7731 nfsrv_deldsserver(int op, char *dspathp, NFSPROC_T *p) 7732 { 7733 struct mount *mp; 7734 struct nfsmount *nmp; 7735 struct nfsdevice *ds; 7736 int error; 7737 7738 NFSD_DEBUG(4, "deldssrv path=%s\n", dspathp); 7739 /* 7740 * Search for the path in the mount list. Avoid looking the path 7741 * up, since this mount point may be hung, with associated locked 7742 * vnodes, etc. 7743 * Set NFSMNTP_CANCELRPCS so that any forced dismount will be blocked 7744 * until this completes. 7745 * As noted in the man page, this should be done before any forced 7746 * dismount on the mount point, but at least the handshake on 7747 * NFSMNTP_CANCELRPCS should make it safe. 7748 */ 7749 error = 0; 7750 ds = NULL; 7751 nmp = NULL; 7752 mtx_lock(&mountlist_mtx); 7753 TAILQ_FOREACH(mp, &mountlist, mnt_list) { 7754 if (strcmp(mp->mnt_stat.f_mntonname, dspathp) == 0 && 7755 strcmp(mp->mnt_stat.f_fstypename, "nfs") == 0 && 7756 mp->mnt_data != NULL) { 7757 nmp = VFSTONFS(mp); 7758 NFSLOCKMNT(nmp); 7759 if ((nmp->nm_privflag & (NFSMNTP_FORCEDISM | 7760 NFSMNTP_CANCELRPCS)) == 0) { 7761 nmp->nm_privflag |= NFSMNTP_CANCELRPCS; 7762 NFSUNLOCKMNT(nmp); 7763 } else { 7764 NFSUNLOCKMNT(nmp); 7765 nmp = NULL; 7766 } 7767 break; 7768 } 7769 } 7770 mtx_unlock(&mountlist_mtx); 7771 7772 if (nmp != NULL) { 7773 ds = nfsrv_deldsnmp(op, nmp, p); 7774 NFSD_DEBUG(4, "deldsnmp=%p\n", ds); 7775 if (ds != NULL) { 7776 nfsrv_killrpcs(nmp); 7777 NFSD_DEBUG(4, "aft killrpcs\n"); 7778 } else 7779 error = ENXIO; 7780 NFSLOCKMNT(nmp); 7781 nmp->nm_privflag &= ~NFSMNTP_CANCELRPCS; 7782 wakeup(nmp); 7783 NFSUNLOCKMNT(nmp); 7784 } else 7785 error = EINVAL; 7786 return (error); 7787 } 7788 7789 /* 7790 * Search for and remove a DS entry which matches the "nmp" argument. 7791 * The nfsdevice structure pointer is returned so that the caller can 7792 * free it via nfsrv_freeonedevid(). 7793 * For the forced case, do not try to do LayoutRecalls, since the server 7794 * must be shut down now anyhow. 7795 */ 7796 struct nfsdevice * 7797 nfsrv_deldsnmp(int op, struct nfsmount *nmp, NFSPROC_T *p) 7798 { 7799 struct nfsdevice *fndds; 7800 7801 NFSD_DEBUG(4, "deldsdvp\n"); 7802 NFSDDSLOCK(); 7803 if (op == PNFSDOP_FORCEDELDS) 7804 fndds = nfsv4_findmirror(nmp); 7805 else 7806 fndds = nfsrv_findmirroredds(nmp); 7807 if (fndds != NULL) 7808 nfsrv_deleteds(fndds); 7809 NFSDDSUNLOCK(); 7810 if (fndds != NULL) { 7811 if (op != PNFSDOP_FORCEDELDS) 7812 nfsrv_flexmirrordel(fndds->nfsdev_deviceid, p); 7813 printf("pNFS server: mirror %s failed\n", fndds->nfsdev_host); 7814 } 7815 return (fndds); 7816 } 7817 7818 /* 7819 * Similar to nfsrv_deldsnmp(), except that the DS is indicated by deviceid. 7820 * This function also calls nfsrv_killrpcs() to unblock RPCs on the mount 7821 * point. 7822 * Also, returns an error instead of the nfsdevice found. 7823 */ 7824 int 7825 nfsrv_delds(char *devid, NFSPROC_T *p) 7826 { 7827 struct nfsdevice *ds, *fndds; 7828 struct nfsmount *nmp; 7829 int fndmirror; 7830 7831 NFSD_DEBUG(4, "delds\n"); 7832 /* 7833 * Search the DS server list for a match with devid. 7834 * Remove the DS entry if found and there is a mirror. 7835 */ 7836 fndds = NULL; 7837 nmp = NULL; 7838 fndmirror = 0; 7839 NFSDDSLOCK(); 7840 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 7841 if (NFSBCMP(ds->nfsdev_deviceid, devid, NFSX_V4DEVICEID) == 0 && 7842 ds->nfsdev_nmp != NULL) { 7843 NFSD_DEBUG(4, "fnd main ds\n"); 7844 fndds = ds; 7845 break; 7846 } 7847 } 7848 if (fndds == NULL) { 7849 NFSDDSUNLOCK(); 7850 return (ENXIO); 7851 } 7852 if (fndds->nfsdev_mdsisset == 0 && nfsrv_faildscnt > 0) 7853 fndmirror = 1; 7854 else if (fndds->nfsdev_mdsisset != 0) { 7855 /* For the fsid is set case, search for a mirror. */ 7856 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 7857 if (ds != fndds && ds->nfsdev_nmp != NULL && 7858 ds->nfsdev_mdsisset != 0 && 7859 fsidcmp(&ds->nfsdev_mdsfsid, 7860 &fndds->nfsdev_mdsfsid) == 0) { 7861 fndmirror = 1; 7862 break; 7863 } 7864 } 7865 } 7866 if (fndmirror != 0) { 7867 nmp = fndds->nfsdev_nmp; 7868 NFSLOCKMNT(nmp); 7869 if ((nmp->nm_privflag & (NFSMNTP_FORCEDISM | 7870 NFSMNTP_CANCELRPCS)) == 0) { 7871 nmp->nm_privflag |= NFSMNTP_CANCELRPCS; 7872 NFSUNLOCKMNT(nmp); 7873 nfsrv_deleteds(fndds); 7874 } else { 7875 NFSUNLOCKMNT(nmp); 7876 nmp = NULL; 7877 } 7878 } 7879 NFSDDSUNLOCK(); 7880 if (nmp != NULL) { 7881 nfsrv_flexmirrordel(fndds->nfsdev_deviceid, p); 7882 printf("pNFS server: mirror %s failed\n", fndds->nfsdev_host); 7883 nfsrv_killrpcs(nmp); 7884 NFSLOCKMNT(nmp); 7885 nmp->nm_privflag &= ~NFSMNTP_CANCELRPCS; 7886 wakeup(nmp); 7887 NFSUNLOCKMNT(nmp); 7888 return (0); 7889 } 7890 return (ENXIO); 7891 } 7892 7893 /* 7894 * Mark a DS as disabled by setting nfsdev_nmp = NULL. 7895 */ 7896 static void 7897 nfsrv_deleteds(struct nfsdevice *fndds) 7898 { 7899 7900 NFSD_DEBUG(4, "deleteds: deleting a mirror\n"); 7901 fndds->nfsdev_nmp = NULL; 7902 if (fndds->nfsdev_mdsisset == 0) 7903 nfsrv_faildscnt--; 7904 } 7905 7906 /* 7907 * Fill in the addr structures for the File and Flex File layouts. 7908 */ 7909 static void 7910 nfsrv_allocdevid(struct nfsdevice *ds, char *addr, char *dnshost) 7911 { 7912 uint32_t *tl; 7913 char *netprot; 7914 int addrlen; 7915 static uint64_t new_devid = 0; 7916 7917 if (strchr(addr, ':') != NULL) 7918 netprot = "tcp6"; 7919 else 7920 netprot = "tcp"; 7921 7922 /* Fill in the device id. */ 7923 NFSBCOPY(&nfsdev_time, ds->nfsdev_deviceid, sizeof(nfsdev_time)); 7924 new_devid++; 7925 NFSBCOPY(&new_devid, &ds->nfsdev_deviceid[sizeof(nfsdev_time)], 7926 sizeof(new_devid)); 7927 7928 /* 7929 * Fill in the file addr (actually the nfsv4_file_layout_ds_addr4 7930 * as defined in RFC5661) in XDR. 7931 */ 7932 addrlen = NFSM_RNDUP(strlen(addr)) + NFSM_RNDUP(strlen(netprot)) + 7933 6 * NFSX_UNSIGNED; 7934 NFSD_DEBUG(4, "hn=%s addr=%s netprot=%s\n", dnshost, addr, netprot); 7935 ds->nfsdev_fileaddrlen = addrlen; 7936 tl = malloc(addrlen, M_NFSDSTATE, M_WAITOK | M_ZERO); 7937 ds->nfsdev_fileaddr = (char *)tl; 7938 *tl++ = txdr_unsigned(1); /* One stripe with index 0. */ 7939 *tl++ = 0; 7940 *tl++ = txdr_unsigned(1); /* One multipath list */ 7941 *tl++ = txdr_unsigned(1); /* with one entry in it. */ 7942 /* The netaddr for this one entry. */ 7943 *tl++ = txdr_unsigned(strlen(netprot)); 7944 NFSBCOPY(netprot, tl, strlen(netprot)); 7945 tl += (NFSM_RNDUP(strlen(netprot)) / NFSX_UNSIGNED); 7946 *tl++ = txdr_unsigned(strlen(addr)); 7947 NFSBCOPY(addr, tl, strlen(addr)); 7948 7949 /* 7950 * Fill in the flex file addr (actually the ff_device_addr4 7951 * as defined for Flexible File Layout) in XDR. 7952 */ 7953 addrlen = NFSM_RNDUP(strlen(addr)) + NFSM_RNDUP(strlen(netprot)) + 7954 14 * NFSX_UNSIGNED; 7955 ds->nfsdev_flexaddrlen = addrlen; 7956 tl = malloc(addrlen, M_NFSDSTATE, M_WAITOK | M_ZERO); 7957 ds->nfsdev_flexaddr = (char *)tl; 7958 *tl++ = txdr_unsigned(1); /* One multipath entry. */ 7959 /* The netaddr for this one entry. */ 7960 *tl++ = txdr_unsigned(strlen(netprot)); 7961 NFSBCOPY(netprot, tl, strlen(netprot)); 7962 tl += (NFSM_RNDUP(strlen(netprot)) / NFSX_UNSIGNED); 7963 *tl++ = txdr_unsigned(strlen(addr)); 7964 NFSBCOPY(addr, tl, strlen(addr)); 7965 tl += (NFSM_RNDUP(strlen(addr)) / NFSX_UNSIGNED); 7966 *tl++ = txdr_unsigned(2); /* Two NFS Versions. */ 7967 *tl++ = txdr_unsigned(NFS_VER4); /* NFSv4. */ 7968 *tl++ = txdr_unsigned(NFSV42_MINORVERSION); /* Minor version 2. */ 7969 *tl++ = txdr_unsigned(nfs_srvmaxio); /* DS max rsize. */ 7970 *tl++ = txdr_unsigned(nfs_srvmaxio); /* DS max wsize. */ 7971 *tl++ = newnfs_true; /* Tightly coupled. */ 7972 *tl++ = txdr_unsigned(NFS_VER4); /* NFSv4. */ 7973 *tl++ = txdr_unsigned(NFSV41_MINORVERSION); /* Minor version 1. */ 7974 *tl++ = txdr_unsigned(nfs_srvmaxio); /* DS max rsize. */ 7975 *tl++ = txdr_unsigned(nfs_srvmaxio); /* DS max wsize. */ 7976 *tl = newnfs_true; /* Tightly coupled. */ 7977 7978 ds->nfsdev_hostnamelen = strlen(dnshost); 7979 ds->nfsdev_host = malloc(ds->nfsdev_hostnamelen + 1, M_NFSDSTATE, 7980 M_WAITOK); 7981 NFSBCOPY(dnshost, ds->nfsdev_host, ds->nfsdev_hostnamelen + 1); 7982 } 7983 7984 /* 7985 * Create the device id list. 7986 * Return 0 if the nfsd threads are to run and ENXIO if the "-p" argument 7987 * is misconfigured. 7988 */ 7989 int 7990 nfsrv_createdevids(struct nfsd_nfsd_args *args, NFSPROC_T *p) 7991 { 7992 struct nfsdevice *ds; 7993 char *addrp, *dnshostp, *dspathp, *mdspathp; 7994 int error, i; 7995 7996 addrp = args->addr; 7997 dnshostp = args->dnshost; 7998 dspathp = args->dspath; 7999 mdspathp = args->mdspath; 8000 nfsrv_maxpnfsmirror = args->mirrorcnt; 8001 if (addrp == NULL || dnshostp == NULL || dspathp == NULL || 8002 mdspathp == NULL) 8003 return (0); 8004 8005 /* 8006 * Loop around for each nul-terminated string in args->addr, 8007 * args->dnshost, args->dnspath and args->mdspath. 8008 */ 8009 while (addrp < (args->addr + args->addrlen) && 8010 dnshostp < (args->dnshost + args->dnshostlen) && 8011 dspathp < (args->dspath + args->dspathlen) && 8012 mdspathp < (args->mdspath + args->mdspathlen)) { 8013 error = nfsrv_setdsserver(dspathp, mdspathp, p, &ds); 8014 if (error != 0) { 8015 /* Free all DS servers. */ 8016 nfsrv_freealldevids(); 8017 nfsrv_devidcnt = 0; 8018 return (ENXIO); 8019 } 8020 nfsrv_allocdevid(ds, addrp, dnshostp); 8021 addrp += (strlen(addrp) + 1); 8022 dnshostp += (strlen(dnshostp) + 1); 8023 dspathp += (strlen(dspathp) + 1); 8024 mdspathp += (strlen(mdspathp) + 1); 8025 } 8026 if (nfsrv_devidcnt < nfsrv_maxpnfsmirror) { 8027 /* Free all DS servers. */ 8028 nfsrv_freealldevids(); 8029 nfsrv_devidcnt = 0; 8030 nfsrv_maxpnfsmirror = 1; 8031 return (ENXIO); 8032 } 8033 /* We can fail at most one less DS than the mirror level. */ 8034 nfsrv_faildscnt = nfsrv_maxpnfsmirror - 1; 8035 8036 /* 8037 * Allocate the nfslayout hash table now, since this is a pNFS server. 8038 * Make it 1% of the high water mark and at least 100. 8039 */ 8040 if (nfslayouthash == NULL) { 8041 nfsrv_layouthashsize = nfsrv_layouthighwater / 100; 8042 if (nfsrv_layouthashsize < 100) 8043 nfsrv_layouthashsize = 100; 8044 nfslayouthash = mallocarray(nfsrv_layouthashsize, 8045 sizeof(struct nfslayouthash), M_NFSDSESSION, M_WAITOK | 8046 M_ZERO); 8047 for (i = 0; i < nfsrv_layouthashsize; i++) { 8048 mtx_init(&nfslayouthash[i].mtx, "nfslm", NULL, MTX_DEF); 8049 TAILQ_INIT(&nfslayouthash[i].list); 8050 } 8051 } 8052 return (0); 8053 } 8054 8055 /* 8056 * Free all device ids. 8057 */ 8058 static void 8059 nfsrv_freealldevids(void) 8060 { 8061 struct nfsdevice *ds, *nds; 8062 8063 TAILQ_FOREACH_SAFE(ds, &nfsrv_devidhead, nfsdev_list, nds) 8064 nfsrv_freedevid(ds); 8065 } 8066 8067 /* 8068 * Check to see if there is a Read/Write Layout plus either: 8069 * - A Write Delegation 8070 * or 8071 * - An Open with Write_access. 8072 * Return 1 if this is the case and 0 otherwise. 8073 * This function is used by nfsrv_proxyds() to decide if doing a Proxy 8074 * Getattr RPC to the Data Server (DS) is necessary. 8075 */ 8076 #define NFSCLIDVECSIZE 6 8077 int 8078 nfsrv_checkdsattr(vnode_t vp, NFSPROC_T *p) 8079 { 8080 fhandle_t fh, *tfhp; 8081 struct nfsstate *stp; 8082 struct nfslayout *lyp; 8083 struct nfslayouthash *lhyp; 8084 struct nfslockhashhead *hp; 8085 struct nfslockfile *lfp; 8086 nfsquad_t clid[NFSCLIDVECSIZE]; 8087 int clidcnt, ret; 8088 8089 ret = nfsvno_getfh(vp, &fh, p); 8090 if (ret != 0) 8091 return (0); 8092 8093 /* First check for a Read/Write Layout. */ 8094 clidcnt = 0; 8095 lhyp = NFSLAYOUTHASH(&fh); 8096 NFSLOCKLAYOUT(lhyp); 8097 TAILQ_FOREACH(lyp, &lhyp->list, lay_list) { 8098 if (NFSBCMP(&lyp->lay_fh, &fh, sizeof(fh)) == 0 && 8099 ((lyp->lay_flags & NFSLAY_RW) != 0 || 8100 ((lyp->lay_flags & NFSLAY_READ) != 0 && 8101 nfsrv_pnfsatime != 0))) { 8102 if (clidcnt < NFSCLIDVECSIZE) 8103 clid[clidcnt].qval = lyp->lay_clientid.qval; 8104 clidcnt++; 8105 } 8106 } 8107 NFSUNLOCKLAYOUT(lhyp); 8108 if (clidcnt == 0) { 8109 /* None found, so return 0. */ 8110 return (0); 8111 } 8112 8113 /* Get the nfslockfile for this fh. */ 8114 NFSLOCKSTATE(); 8115 hp = NFSLOCKHASH(&fh); 8116 LIST_FOREACH(lfp, hp, lf_hash) { 8117 tfhp = &lfp->lf_fh; 8118 if (NFSVNO_CMPFH(&fh, tfhp)) 8119 break; 8120 } 8121 if (lfp == NULL) { 8122 /* None found, so return 0. */ 8123 NFSUNLOCKSTATE(); 8124 return (0); 8125 } 8126 8127 /* Now, look for a Write delegation for this clientid. */ 8128 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) { 8129 if ((stp->ls_flags & NFSLCK_DELEGWRITE) != 0 && 8130 nfsrv_fndclid(clid, stp->ls_clp->lc_clientid, clidcnt) != 0) 8131 break; 8132 } 8133 if (stp != NULL) { 8134 /* Found one, so return 1. */ 8135 NFSUNLOCKSTATE(); 8136 return (1); 8137 } 8138 8139 /* No Write delegation, so look for an Open with Write_access. */ 8140 LIST_FOREACH(stp, &lfp->lf_open, ls_file) { 8141 KASSERT((stp->ls_flags & NFSLCK_OPEN) != 0, 8142 ("nfsrv_checkdsattr: Non-open in Open list\n")); 8143 if ((stp->ls_flags & NFSLCK_WRITEACCESS) != 0 && 8144 nfsrv_fndclid(clid, stp->ls_clp->lc_clientid, clidcnt) != 0) 8145 break; 8146 } 8147 NFSUNLOCKSTATE(); 8148 if (stp != NULL) 8149 return (1); 8150 return (0); 8151 } 8152 8153 /* 8154 * Look for a matching clientid in the vector. Return 1 if one might match. 8155 */ 8156 static int 8157 nfsrv_fndclid(nfsquad_t *clidvec, nfsquad_t clid, int clidcnt) 8158 { 8159 int i; 8160 8161 /* If too many for the vector, return 1 since there might be a match. */ 8162 if (clidcnt > NFSCLIDVECSIZE) 8163 return (1); 8164 8165 for (i = 0; i < clidcnt; i++) 8166 if (clidvec[i].qval == clid.qval) 8167 return (1); 8168 return (0); 8169 } 8170 8171 /* 8172 * Check the don't list for "vp" and see if issuing an rw layout is allowed. 8173 * Return 1 if issuing an rw layout isn't allowed, 0 otherwise. 8174 */ 8175 static int 8176 nfsrv_dontlayout(fhandle_t *fhp) 8177 { 8178 struct nfsdontlist *mrp; 8179 int ret; 8180 8181 if (nfsrv_dontlistlen == 0) 8182 return (0); 8183 ret = 0; 8184 NFSDDONTLISTLOCK(); 8185 LIST_FOREACH(mrp, &nfsrv_dontlisthead, nfsmr_list) { 8186 if (NFSBCMP(fhp, &mrp->nfsmr_fh, sizeof(*fhp)) == 0 && 8187 (mrp->nfsmr_flags & NFSMR_DONTLAYOUT) != 0) { 8188 ret = 1; 8189 break; 8190 } 8191 } 8192 NFSDDONTLISTUNLOCK(); 8193 return (ret); 8194 } 8195 8196 #define PNFSDS_COPYSIZ 65536 8197 /* 8198 * Create a new file on a DS and copy the contents of an extant DS file to it. 8199 * This can be used for recovery of a DS file onto a recovered DS. 8200 * The steps are: 8201 * - When called, the MDS file's vnode is locked, blocking LayoutGet operations. 8202 * - Disable issuing of read/write layouts for the file via the nfsdontlist, 8203 * so that they will be disabled after the MDS file's vnode is unlocked. 8204 * - Set up the nfsrv_recalllist so that recall of read/write layouts can 8205 * be done. 8206 * - Unlock the MDS file's vnode, so that the client(s) can perform proxied 8207 * writes, LayoutCommits and LayoutReturns for the file when completing the 8208 * LayoutReturn requested by the LayoutRecall callback. 8209 * - Issue a LayoutRecall callback for all read/write layouts and wait for 8210 * them to be returned. (If the LayoutRecall callback replies 8211 * NFSERR_NOMATCHLAYOUT, they are gone and no LayoutReturn is needed.) 8212 * - Exclusively lock the MDS file's vnode. This ensures that no proxied 8213 * writes are in progress or can occur during the DS file copy. 8214 * It also blocks Setattr operations. 8215 * - Create the file on the recovered mirror. 8216 * - Copy the file from the operational DS. 8217 * - Copy any ACL from the MDS file to the new DS file. 8218 * - Set the modify time of the new DS file to that of the MDS file. 8219 * - Update the extended attribute for the MDS file. 8220 * - Enable issuing of rw layouts by deleting the nfsdontlist entry. 8221 * - The caller will unlock the MDS file's vnode allowing operations 8222 * to continue normally, since it is now on the mirror again. 8223 */ 8224 int 8225 nfsrv_copymr(vnode_t vp, vnode_t fvp, vnode_t dvp, struct nfsdevice *ds, 8226 struct pnfsdsfile *pf, struct pnfsdsfile *wpf, int mirrorcnt, 8227 struct ucred *cred, NFSPROC_T *p) 8228 { 8229 struct nfsdontlist *mrp, *nmrp; 8230 struct nfslayouthash *lhyp; 8231 struct nfslayout *lyp, *nlyp; 8232 struct nfslayouthead thl; 8233 struct mount *mp, *tvmp; 8234 struct acl *aclp; 8235 struct vattr va; 8236 struct timespec mtime; 8237 fhandle_t fh; 8238 vnode_t tvp; 8239 off_t rdpos, wrpos; 8240 ssize_t aresid; 8241 char *dat; 8242 int didprintf, ret, retacl, xfer; 8243 8244 ASSERT_VOP_LOCKED(fvp, "nfsrv_copymr fvp"); 8245 ASSERT_VOP_LOCKED(vp, "nfsrv_copymr vp"); 8246 /* 8247 * Allocate a nfsdontlist entry and set the NFSMR_DONTLAYOUT flag 8248 * so that no more RW layouts will get issued. 8249 */ 8250 ret = nfsvno_getfh(vp, &fh, p); 8251 if (ret != 0) { 8252 NFSD_DEBUG(4, "nfsrv_copymr: getfh=%d\n", ret); 8253 return (ret); 8254 } 8255 nmrp = malloc(sizeof(*nmrp), M_NFSDSTATE, M_WAITOK); 8256 nmrp->nfsmr_flags = NFSMR_DONTLAYOUT; 8257 NFSBCOPY(&fh, &nmrp->nfsmr_fh, sizeof(fh)); 8258 NFSDDONTLISTLOCK(); 8259 LIST_FOREACH(mrp, &nfsrv_dontlisthead, nfsmr_list) { 8260 if (NFSBCMP(&fh, &mrp->nfsmr_fh, sizeof(fh)) == 0) 8261 break; 8262 } 8263 if (mrp == NULL) { 8264 LIST_INSERT_HEAD(&nfsrv_dontlisthead, nmrp, nfsmr_list); 8265 mrp = nmrp; 8266 nmrp = NULL; 8267 nfsrv_dontlistlen++; 8268 NFSD_DEBUG(4, "nfsrv_copymr: in dontlist\n"); 8269 } else { 8270 NFSDDONTLISTUNLOCK(); 8271 free(nmrp, M_NFSDSTATE); 8272 NFSD_DEBUG(4, "nfsrv_copymr: dup dontlist\n"); 8273 return (ENXIO); 8274 } 8275 NFSDDONTLISTUNLOCK(); 8276 8277 /* 8278 * Search for all RW layouts for this file. Move them to the 8279 * recall list, so they can be recalled and their return noted. 8280 */ 8281 lhyp = NFSLAYOUTHASH(&fh); 8282 NFSDRECALLLOCK(); 8283 NFSLOCKLAYOUT(lhyp); 8284 TAILQ_FOREACH_SAFE(lyp, &lhyp->list, lay_list, nlyp) { 8285 if (NFSBCMP(&lyp->lay_fh, &fh, sizeof(fh)) == 0 && 8286 (lyp->lay_flags & NFSLAY_RW) != 0) { 8287 TAILQ_REMOVE(&lhyp->list, lyp, lay_list); 8288 TAILQ_INSERT_HEAD(&nfsrv_recalllisthead, lyp, lay_list); 8289 lyp->lay_trycnt = 0; 8290 } 8291 } 8292 NFSUNLOCKLAYOUT(lhyp); 8293 NFSDRECALLUNLOCK(); 8294 8295 ret = 0; 8296 mp = tvmp = NULL; 8297 didprintf = 0; 8298 TAILQ_INIT(&thl); 8299 /* Unlock the MDS vp, so that a LayoutReturn can be done on it. */ 8300 NFSVOPUNLOCK(vp); 8301 /* Now, do a recall for all layouts not yet recalled. */ 8302 tryagain: 8303 NFSDRECALLLOCK(); 8304 TAILQ_FOREACH(lyp, &nfsrv_recalllisthead, lay_list) { 8305 if (NFSBCMP(&lyp->lay_fh, &fh, sizeof(fh)) == 0 && 8306 (lyp->lay_flags & NFSLAY_RECALL) == 0) { 8307 lyp->lay_flags |= NFSLAY_RECALL; 8308 /* 8309 * The layout stateid.seqid needs to be incremented 8310 * before doing a LAYOUT_RECALL callback. 8311 */ 8312 if (++lyp->lay_stateid.seqid == 0) 8313 lyp->lay_stateid.seqid = 1; 8314 NFSDRECALLUNLOCK(); 8315 nfsrv_recalllayout(lyp->lay_clientid, &lyp->lay_stateid, 8316 &lyp->lay_fh, lyp, 0, lyp->lay_type, p); 8317 NFSD_DEBUG(4, "nfsrv_copymr: recalled layout\n"); 8318 goto tryagain; 8319 } 8320 } 8321 8322 /* Now wait for them to be returned. */ 8323 tryagain2: 8324 TAILQ_FOREACH(lyp, &nfsrv_recalllisthead, lay_list) { 8325 if (NFSBCMP(&lyp->lay_fh, &fh, sizeof(fh)) == 0) { 8326 if ((lyp->lay_flags & NFSLAY_RETURNED) != 0) { 8327 TAILQ_REMOVE(&nfsrv_recalllisthead, lyp, 8328 lay_list); 8329 TAILQ_INSERT_HEAD(&thl, lyp, lay_list); 8330 NFSD_DEBUG(4, 8331 "nfsrv_copymr: layout returned\n"); 8332 } else { 8333 lyp->lay_trycnt++; 8334 ret = mtx_sleep(lyp, NFSDRECALLMUTEXPTR, 8335 PVFS | PCATCH, "nfsmrl", hz); 8336 NFSD_DEBUG(4, "nfsrv_copymr: aft sleep=%d\n", 8337 ret); 8338 if (ret == EINTR || ret == ERESTART) 8339 break; 8340 if ((lyp->lay_flags & NFSLAY_RETURNED) == 0) { 8341 /* 8342 * Give up after 60sec and return 8343 * ENXIO, failing the copymr. 8344 * This layout will remain on the 8345 * recalllist. It can only be cleared 8346 * by restarting the nfsd. 8347 * This seems the safe way to handle 8348 * it, since it cannot be safely copied 8349 * with an outstanding RW layout. 8350 */ 8351 if (lyp->lay_trycnt >= 60) { 8352 ret = ENXIO; 8353 break; 8354 } 8355 if (didprintf == 0) { 8356 printf("nfsrv_copymr: layout " 8357 "not returned\n"); 8358 didprintf = 1; 8359 } 8360 } 8361 } 8362 goto tryagain2; 8363 } 8364 } 8365 NFSDRECALLUNLOCK(); 8366 /* We can now get rid of the layouts that have been returned. */ 8367 TAILQ_FOREACH_SAFE(lyp, &thl, lay_list, nlyp) 8368 nfsrv_freelayout(&thl, lyp); 8369 8370 /* 8371 * Do the vn_start_write() calls here, before the MDS vnode is 8372 * locked and the tvp is created (locked) in the NFS file system 8373 * that dvp is in. 8374 * For tvmp, this probably isn't necessary, since it will be an 8375 * NFS mount and they are not suspendable at this time. 8376 */ 8377 if (ret == 0) 8378 ret = vn_start_write(vp, &mp, V_WAIT | V_PCATCH); 8379 if (ret == 0) { 8380 tvmp = dvp->v_mount; 8381 ret = vn_start_write(NULL, &tvmp, V_WAIT | V_PCATCH); 8382 } 8383 8384 /* 8385 * LK_EXCLUSIVE lock the MDS vnode, so that any 8386 * proxied writes through the MDS will be blocked until we have 8387 * completed the copy and update of the extended attributes. 8388 * This will also ensure that any attributes and ACL will not be 8389 * changed until the copy is complete. 8390 */ 8391 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 8392 if (ret == 0 && VN_IS_DOOMED(vp)) { 8393 NFSD_DEBUG(4, "nfsrv_copymr: lk_exclusive doomed\n"); 8394 ret = ESTALE; 8395 } 8396 8397 /* Create the data file on the recovered DS. */ 8398 if (ret == 0) 8399 ret = nfsrv_createdsfile(vp, &fh, pf, dvp, ds, cred, p, &tvp); 8400 8401 /* Copy the DS file, if created successfully. */ 8402 if (ret == 0) { 8403 /* 8404 * Get any NFSv4 ACL on the MDS file, so that it can be set 8405 * on the new DS file. 8406 */ 8407 aclp = acl_alloc(M_WAITOK | M_ZERO); 8408 retacl = VOP_GETACL(vp, ACL_TYPE_NFS4, aclp, cred, p); 8409 if (retacl != 0 && retacl != ENOATTR) 8410 NFSD_DEBUG(1, "nfsrv_copymr: vop_getacl=%d\n", retacl); 8411 dat = malloc(PNFSDS_COPYSIZ, M_TEMP, M_WAITOK); 8412 /* Malloc a block of 0s used to check for holes. */ 8413 if (nfsrv_zeropnfsdat == NULL) 8414 nfsrv_zeropnfsdat = malloc(PNFSDS_COPYSIZ, M_TEMP, 8415 M_WAITOK | M_ZERO); 8416 rdpos = wrpos = 0; 8417 ret = VOP_GETATTR(fvp, &va, cred); 8418 aresid = 0; 8419 while (ret == 0 && aresid == 0) { 8420 ret = vn_rdwr(UIO_READ, fvp, dat, PNFSDS_COPYSIZ, 8421 rdpos, UIO_SYSSPACE, IO_NODELOCKED, cred, NULL, 8422 &aresid, p); 8423 xfer = PNFSDS_COPYSIZ - aresid; 8424 if (ret == 0 && xfer > 0) { 8425 rdpos += xfer; 8426 /* 8427 * Skip the write for holes, except for the 8428 * last block. 8429 */ 8430 if (xfer < PNFSDS_COPYSIZ || rdpos == 8431 va.va_size || NFSBCMP(dat, 8432 nfsrv_zeropnfsdat, PNFSDS_COPYSIZ) != 0) 8433 ret = vn_rdwr(UIO_WRITE, tvp, dat, xfer, 8434 wrpos, UIO_SYSSPACE, IO_NODELOCKED, 8435 cred, NULL, NULL, p); 8436 if (ret == 0) 8437 wrpos += xfer; 8438 } 8439 } 8440 8441 /* If there is an ACL and the copy succeeded, set the ACL. */ 8442 if (ret == 0 && retacl == 0) { 8443 ret = VOP_SETACL(tvp, ACL_TYPE_NFS4, aclp, cred, p); 8444 /* 8445 * Don't consider these as errors, since VOP_GETACL() 8446 * can return an ACL when they are not actually 8447 * supported. For example, for UFS, VOP_GETACL() 8448 * will return a trivial ACL based on the uid/gid/mode 8449 * when there is no ACL on the file. 8450 * This case should be recognized as a trivial ACL 8451 * by UFS's VOP_SETACL() and succeed, but... 8452 */ 8453 if (ret == ENOATTR || ret == EOPNOTSUPP || ret == EPERM) 8454 ret = 0; 8455 } 8456 8457 if (ret == 0) 8458 ret = VOP_FSYNC(tvp, MNT_WAIT, p); 8459 8460 /* Set the DS data file's modify time that of the MDS file. */ 8461 if (ret == 0) 8462 ret = VOP_GETATTR(vp, &va, cred); 8463 if (ret == 0) { 8464 mtime = va.va_mtime; 8465 VATTR_NULL(&va); 8466 va.va_mtime = mtime; 8467 ret = VOP_SETATTR(tvp, &va, cred); 8468 } 8469 8470 vput(tvp); 8471 acl_free(aclp); 8472 free(dat, M_TEMP); 8473 } 8474 if (tvmp != NULL) 8475 vn_finished_write(tvmp); 8476 8477 /* Update the extended attributes for the newly created DS file. */ 8478 if (ret == 0) 8479 ret = vn_extattr_set(vp, IO_NODELOCKED, 8480 EXTATTR_NAMESPACE_SYSTEM, "pnfsd.dsfile", 8481 sizeof(*wpf) * mirrorcnt, (char *)wpf, p); 8482 if (mp != NULL) 8483 vn_finished_write(mp); 8484 8485 /* Get rid of the dontlist entry, so that Layouts can be issued. */ 8486 NFSDDONTLISTLOCK(); 8487 LIST_REMOVE(mrp, nfsmr_list); 8488 NFSDDONTLISTUNLOCK(); 8489 free(mrp, M_NFSDSTATE); 8490 return (ret); 8491 } 8492 8493 /* 8494 * Create a data storage file on the recovered DS. 8495 */ 8496 static int 8497 nfsrv_createdsfile(vnode_t vp, fhandle_t *fhp, struct pnfsdsfile *pf, 8498 vnode_t dvp, struct nfsdevice *ds, struct ucred *cred, NFSPROC_T *p, 8499 vnode_t *tvpp) 8500 { 8501 struct vattr va, nva; 8502 int error; 8503 8504 /* Make data file name based on FH. */ 8505 error = VOP_GETATTR(vp, &va, cred); 8506 if (error == 0) { 8507 /* Set the attributes for "vp" to Setattr the DS vp. */ 8508 VATTR_NULL(&nva); 8509 nva.va_uid = va.va_uid; 8510 nva.va_gid = va.va_gid; 8511 nva.va_mode = va.va_mode; 8512 nva.va_size = 0; 8513 VATTR_NULL(&va); 8514 va.va_type = VREG; 8515 va.va_mode = nva.va_mode; 8516 NFSD_DEBUG(4, "nfsrv_dscreatefile: dvp=%p pf=%p\n", dvp, pf); 8517 error = nfsrv_dscreate(dvp, &va, &nva, fhp, pf, NULL, 8518 pf->dsf_filename, cred, p, tvpp); 8519 } 8520 return (error); 8521 } 8522 8523 /* 8524 * Look up the MDS file shared locked, and then get the extended attribute 8525 * to find the extant DS file to be copied to the new mirror. 8526 * If successful, *vpp is set to the MDS file's vp and *nvpp is 8527 * set to a DS data file for the MDS file, both exclusively locked. 8528 * The "buf" argument has the pnfsdsfile structure from the MDS file 8529 * in it and buflen is set to its length. 8530 */ 8531 int 8532 nfsrv_mdscopymr(char *mdspathp, char *dspathp, char *curdspathp, char *buf, 8533 int *buflenp, char *fname, NFSPROC_T *p, struct vnode **vpp, 8534 struct vnode **nvpp, struct pnfsdsfile **pfp, struct nfsdevice **dsp, 8535 struct nfsdevice **fdsp) 8536 { 8537 struct nameidata nd; 8538 struct vnode *vp, *curvp; 8539 struct pnfsdsfile *pf; 8540 struct nfsmount *nmp, *curnmp; 8541 int dsdir, error, mirrorcnt, ippos; 8542 8543 vp = NULL; 8544 curvp = NULL; 8545 curnmp = NULL; 8546 *dsp = NULL; 8547 *fdsp = NULL; 8548 if (dspathp == NULL && curdspathp != NULL) 8549 return (EPERM); 8550 8551 /* 8552 * Look up the MDS file shared locked. The lock will be upgraded 8553 * to an exclusive lock after any rw layouts have been returned. 8554 */ 8555 NFSD_DEBUG(4, "mdsopen path=%s\n", mdspathp); 8556 NDINIT(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF, UIO_SYSSPACE, 8557 mdspathp); 8558 error = namei(&nd); 8559 NFSD_DEBUG(4, "lookup=%d\n", error); 8560 if (error != 0) 8561 return (error); 8562 if (nd.ni_vp->v_type != VREG) { 8563 vput(nd.ni_vp); 8564 NFSD_DEBUG(4, "mdspath not reg\n"); 8565 return (EISDIR); 8566 } 8567 vp = nd.ni_vp; 8568 8569 if (curdspathp != NULL) { 8570 /* 8571 * Look up the current DS path and find the nfsdev structure for 8572 * it. 8573 */ 8574 NFSD_DEBUG(4, "curmdsdev path=%s\n", curdspathp); 8575 NDINIT(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF, 8576 UIO_SYSSPACE, curdspathp); 8577 error = namei(&nd); 8578 NFSD_DEBUG(4, "ds lookup=%d\n", error); 8579 if (error != 0) { 8580 vput(vp); 8581 return (error); 8582 } 8583 if (nd.ni_vp->v_type != VDIR) { 8584 vput(nd.ni_vp); 8585 vput(vp); 8586 NFSD_DEBUG(4, "curdspath not dir\n"); 8587 return (ENOTDIR); 8588 } 8589 if (strcmp(nd.ni_vp->v_mount->mnt_vfc->vfc_name, "nfs") != 0) { 8590 vput(nd.ni_vp); 8591 vput(vp); 8592 NFSD_DEBUG(4, "curdspath not an NFS mount\n"); 8593 return (ENXIO); 8594 } 8595 curnmp = VFSTONFS(nd.ni_vp->v_mount); 8596 8597 /* Search the nfsdev list for a match. */ 8598 NFSDDSLOCK(); 8599 *fdsp = nfsv4_findmirror(curnmp); 8600 NFSDDSUNLOCK(); 8601 if (*fdsp == NULL) 8602 curnmp = NULL; 8603 if (curnmp == NULL) { 8604 vput(nd.ni_vp); 8605 vput(vp); 8606 NFSD_DEBUG(4, "mdscopymr: no current ds\n"); 8607 return (ENXIO); 8608 } 8609 curvp = nd.ni_vp; 8610 } 8611 8612 if (dspathp != NULL) { 8613 /* Look up the nfsdev path and find the nfsdev structure. */ 8614 NFSD_DEBUG(4, "mdsdev path=%s\n", dspathp); 8615 NDINIT(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF, 8616 UIO_SYSSPACE, dspathp); 8617 error = namei(&nd); 8618 NFSD_DEBUG(4, "ds lookup=%d\n", error); 8619 if (error != 0) { 8620 vput(vp); 8621 if (curvp != NULL) 8622 vput(curvp); 8623 return (error); 8624 } 8625 if (nd.ni_vp->v_type != VDIR || nd.ni_vp == curvp) { 8626 vput(nd.ni_vp); 8627 vput(vp); 8628 if (curvp != NULL) 8629 vput(curvp); 8630 NFSD_DEBUG(4, "dspath not dir\n"); 8631 if (nd.ni_vp == curvp) 8632 return (EPERM); 8633 return (ENOTDIR); 8634 } 8635 if (strcmp(nd.ni_vp->v_mount->mnt_vfc->vfc_name, "nfs") != 0) { 8636 vput(nd.ni_vp); 8637 vput(vp); 8638 if (curvp != NULL) 8639 vput(curvp); 8640 NFSD_DEBUG(4, "dspath not an NFS mount\n"); 8641 return (ENXIO); 8642 } 8643 nmp = VFSTONFS(nd.ni_vp->v_mount); 8644 8645 /* 8646 * Search the nfsdevice list for a match. If curnmp == NULL, 8647 * this is a recovery and there must be a mirror. 8648 */ 8649 NFSDDSLOCK(); 8650 if (curnmp == NULL) 8651 *dsp = nfsrv_findmirroredds(nmp); 8652 else 8653 *dsp = nfsv4_findmirror(nmp); 8654 NFSDDSUNLOCK(); 8655 if (*dsp == NULL) { 8656 vput(nd.ni_vp); 8657 vput(vp); 8658 if (curvp != NULL) 8659 vput(curvp); 8660 NFSD_DEBUG(4, "mdscopymr: no ds\n"); 8661 return (ENXIO); 8662 } 8663 } else { 8664 nd.ni_vp = NULL; 8665 nmp = NULL; 8666 } 8667 8668 /* 8669 * Get a vp for an available DS data file using the extended 8670 * attribute on the MDS file. 8671 * If there is a valid entry for the new DS in the extended attribute 8672 * on the MDS file (as checked via the nmp argument), 8673 * nfsrv_dsgetsockmnt() returns EEXIST, so no copying will occur. 8674 */ 8675 error = nfsrv_dsgetsockmnt(vp, 0, buf, buflenp, &mirrorcnt, p, 8676 NULL, NULL, NULL, fname, nvpp, &nmp, curnmp, &ippos, &dsdir); 8677 if (curvp != NULL) 8678 vput(curvp); 8679 if (nd.ni_vp == NULL) { 8680 if (error == 0 && nmp != NULL) { 8681 /* Search the nfsdev list for a match. */ 8682 NFSDDSLOCK(); 8683 *dsp = nfsrv_findmirroredds(nmp); 8684 NFSDDSUNLOCK(); 8685 } 8686 if (error == 0 && (nmp == NULL || *dsp == NULL)) { 8687 if (nvpp != NULL && *nvpp != NULL) { 8688 vput(*nvpp); 8689 *nvpp = NULL; 8690 } 8691 error = ENXIO; 8692 } 8693 } else 8694 vput(nd.ni_vp); 8695 8696 /* 8697 * When dspathp != NULL and curdspathp == NULL, this is a recovery 8698 * and is only allowed if there is a 0.0.0.0 IP address entry. 8699 * When curdspathp != NULL, the ippos will be set to that entry. 8700 */ 8701 if (error == 0 && dspathp != NULL && ippos == -1) { 8702 if (nvpp != NULL && *nvpp != NULL) { 8703 vput(*nvpp); 8704 *nvpp = NULL; 8705 } 8706 error = ENXIO; 8707 } 8708 if (error == 0) { 8709 *vpp = vp; 8710 8711 pf = (struct pnfsdsfile *)buf; 8712 if (ippos == -1) { 8713 /* If no zeroip pnfsdsfile, add one. */ 8714 ippos = *buflenp / sizeof(*pf); 8715 *buflenp += sizeof(*pf); 8716 pf += ippos; 8717 pf->dsf_dir = dsdir; 8718 strlcpy(pf->dsf_filename, fname, 8719 sizeof(pf->dsf_filename)); 8720 } else 8721 pf += ippos; 8722 *pfp = pf; 8723 } else 8724 vput(vp); 8725 return (error); 8726 } 8727 8728 /* 8729 * Search for a matching pnfsd mirror device structure, base on the nmp arg. 8730 * Return one if found, NULL otherwise. 8731 */ 8732 static struct nfsdevice * 8733 nfsrv_findmirroredds(struct nfsmount *nmp) 8734 { 8735 struct nfsdevice *ds, *fndds; 8736 int fndmirror; 8737 8738 mtx_assert(NFSDDSMUTEXPTR, MA_OWNED); 8739 /* 8740 * Search the DS server list for a match with nmp. 8741 * Remove the DS entry if found and there is a mirror. 8742 */ 8743 fndds = NULL; 8744 fndmirror = 0; 8745 if (nfsrv_devidcnt == 0) 8746 return (fndds); 8747 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 8748 if (ds->nfsdev_nmp == nmp) { 8749 NFSD_DEBUG(4, "nfsrv_findmirroredds: fnd main ds\n"); 8750 fndds = ds; 8751 break; 8752 } 8753 } 8754 if (fndds == NULL) 8755 return (fndds); 8756 if (fndds->nfsdev_mdsisset == 0 && nfsrv_faildscnt > 0) 8757 fndmirror = 1; 8758 else if (fndds->nfsdev_mdsisset != 0) { 8759 /* For the fsid is set case, search for a mirror. */ 8760 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 8761 if (ds != fndds && ds->nfsdev_nmp != NULL && 8762 ds->nfsdev_mdsisset != 0 && 8763 fsidcmp(&ds->nfsdev_mdsfsid, 8764 &fndds->nfsdev_mdsfsid) == 0) { 8765 fndmirror = 1; 8766 break; 8767 } 8768 } 8769 } 8770 if (fndmirror == 0) { 8771 NFSD_DEBUG(4, "nfsrv_findmirroredds: no mirror for DS\n"); 8772 return (NULL); 8773 } 8774 return (fndds); 8775 } 8776 8777 /* 8778 * Mark the appropriate devid and all associated layout as "out of space". 8779 */ 8780 void 8781 nfsrv_marknospc(char *devid, bool setit) 8782 { 8783 struct nfsdevice *ds; 8784 struct nfslayout *lyp; 8785 struct nfslayouthash *lhyp; 8786 int i; 8787 8788 NFSDDSLOCK(); 8789 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 8790 if (NFSBCMP(ds->nfsdev_deviceid, devid, NFSX_V4DEVICEID) == 0) { 8791 NFSD_DEBUG(1, "nfsrv_marknospc: devid %d\n", setit); 8792 ds->nfsdev_nospc = setit; 8793 } 8794 } 8795 NFSDDSUNLOCK(); 8796 8797 for (i = 0; i < nfsrv_layouthashsize; i++) { 8798 lhyp = &nfslayouthash[i]; 8799 NFSLOCKLAYOUT(lhyp); 8800 TAILQ_FOREACH(lyp, &lhyp->list, lay_list) { 8801 if (NFSBCMP(lyp->lay_deviceid, devid, 8802 NFSX_V4DEVICEID) == 0) { 8803 NFSD_DEBUG(1, "nfsrv_marknospc: layout %d\n", 8804 setit); 8805 if (setit) 8806 lyp->lay_flags |= NFSLAY_NOSPC; 8807 else 8808 lyp->lay_flags &= ~NFSLAY_NOSPC; 8809 } 8810 } 8811 NFSUNLOCKLAYOUT(lhyp); 8812 } 8813 } 8814 8815 /* 8816 * Check to see if SP4_MACH_CRED is in use and, if it is, check that the 8817 * correct machine credential is being used. 8818 */ 8819 static int 8820 nfsrv_checkmachcred(int op, struct nfsrv_descript *nd, struct nfsclient *clp) 8821 { 8822 8823 if ((clp->lc_flags & LCL_MACHCRED) == 0 || 8824 !NFSISSET_OPBIT(&clp->lc_mustops, op)) 8825 return (0); 8826 KASSERT((nd->nd_flag & ND_NFSV41) != 0, 8827 ("nfsrv_checkmachcred: MachCred for NFSv4.0")); 8828 if ((nd->nd_flag & (ND_GSSINTEGRITY | ND_GSSPRIVACY)) != 0 && 8829 nd->nd_princlen == clp->lc_namelen && 8830 !NFSBCMP(nd->nd_principal, clp->lc_name, nd->nd_princlen)) 8831 return (0); 8832 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 8833 } 8834 8835 /* 8836 * Issue a delegation and, optionally set rflagsp for why not. 8837 */ 8838 static void 8839 nfsrv_issuedelegation(struct vnode *vp, struct nfsclient *clp, 8840 struct nfsrv_descript *nd, int delegate, int writedeleg, int readonly, 8841 u_quad_t filerev, uint64_t rdonly, struct nfsstate **new_delegp, 8842 struct nfsstate *new_stp, struct nfslockfile *lfp, uint32_t *rflagsp, 8843 nfsv4stateid_t *delegstateidp) 8844 { 8845 struct nfsstate *up_deleg, *new_deleg; 8846 8847 new_deleg = *new_delegp; 8848 up_deleg = LIST_FIRST(&lfp->lf_deleg); 8849 if ((new_stp->ls_flags & NFSLCK_WANTNODELEG) != 0) 8850 *rflagsp |= NFSV4OPEN_WDNOTWANTED; 8851 else if (nfsrv_issuedelegs == 0) 8852 *rflagsp |= NFSV4OPEN_WDSUPPFTYPE; 8853 else if (NFSRV_V4DELEGLIMIT(nfsrv_delegatecnt)) 8854 *rflagsp |= NFSV4OPEN_WDRESOURCE; 8855 else if (delegate == 0 || !NFSVNO_DELEGOK(vp) || 8856 (writedeleg == 0 && (readonly == 0 || 8857 (new_stp->ls_flags & NFSLCK_WANTWDELEG) != 0)) || 8858 (clp->lc_flags & (LCL_CALLBACKSON | LCL_CBDOWN)) != 8859 LCL_CALLBACKSON) { 8860 /* Is this a downgrade attempt? */ 8861 if (up_deleg != NULL && up_deleg->ls_clp == clp && 8862 (up_deleg->ls_flags & NFSLCK_DELEGWRITE) != 0 && 8863 (new_stp->ls_flags & NFSLCK_WANTRDELEG) != 0) 8864 *rflagsp |= NFSV4OPEN_WDNOTSUPPDOWNGRADE; 8865 else 8866 *rflagsp |= NFSV4OPEN_WDCONTENTION; 8867 } else if (up_deleg != NULL && 8868 (up_deleg->ls_flags & NFSLCK_DELEGREAD) != 0 && 8869 (new_stp->ls_flags & NFSLCK_WANTWDELEG) != 0) { 8870 /* This is an atomic upgrade. */ 8871 up_deleg->ls_stateid.seqid++; 8872 delegstateidp->seqid = up_deleg->ls_stateid.seqid; 8873 delegstateidp->other[0] = up_deleg->ls_stateid.other[0]; 8874 delegstateidp->other[1] = up_deleg->ls_stateid.other[1]; 8875 delegstateidp->other[2] = up_deleg->ls_stateid.other[2]; 8876 up_deleg->ls_flags = (NFSLCK_DELEGWRITE | 8877 NFSLCK_READACCESS | NFSLCK_WRITEACCESS); 8878 *rflagsp |= NFSV4OPEN_WRITEDELEGATE; 8879 nfsrv_writedelegcnt++; 8880 } else { 8881 new_deleg->ls_stateid.seqid = delegstateidp->seqid = 1; 8882 new_deleg->ls_stateid.other[0] = delegstateidp->other[0] 8883 = clp->lc_clientid.lval[0]; 8884 new_deleg->ls_stateid.other[1] = delegstateidp->other[1] 8885 = clp->lc_clientid.lval[1]; 8886 new_deleg->ls_stateid.other[2] = delegstateidp->other[2] 8887 = nfsrv_nextstateindex(clp); 8888 if (writedeleg && !rdonly && 8889 (nfsrv_writedelegifpos || !readonly) && 8890 (new_stp->ls_flags & (NFSLCK_WANTRDELEG | 8891 NFSLCK_WANTWDELEG)) != NFSLCK_WANTRDELEG) { 8892 new_deleg->ls_flags = (NFSLCK_DELEGWRITE | 8893 NFSLCK_READACCESS | NFSLCK_WRITEACCESS); 8894 *rflagsp |= NFSV4OPEN_WRITEDELEGATE; 8895 nfsrv_writedelegcnt++; 8896 } else { 8897 new_deleg->ls_flags = (NFSLCK_DELEGREAD | 8898 NFSLCK_READACCESS); 8899 *rflagsp |= NFSV4OPEN_READDELEGATE; 8900 } 8901 new_deleg->ls_uid = new_stp->ls_uid; 8902 new_deleg->ls_lfp = lfp; 8903 new_deleg->ls_clp = clp; 8904 new_deleg->ls_filerev = filerev; 8905 new_deleg->ls_compref = nd->nd_compref; 8906 new_deleg->ls_lastrecall = 0; 8907 LIST_INSERT_HEAD(&lfp->lf_deleg, new_deleg, ls_file); 8908 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_deleg->ls_stateid), 8909 new_deleg, ls_hash); 8910 LIST_INSERT_HEAD(&clp->lc_deleg, new_deleg, ls_list); 8911 *new_delegp = NULL; 8912 NFSD_VNET(nfsstatsv1_p)->srvdelegates++; 8913 nfsrv_openpluslock++; 8914 nfsrv_delegatecnt++; 8915 } 8916 } 8917