1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2009 Rick Macklem, University of Guelph 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #ifndef APPLEKEXT 34 #include <sys/extattr.h> 35 #include <fs/nfs/nfsport.h> 36 37 struct nfsrv_stablefirst nfsrv_stablefirst; 38 int nfsrv_issuedelegs = 0; 39 int nfsrv_dolocallocks = 0; 40 struct nfsv4lock nfsv4rootfs_lock; 41 time_t nfsdev_time = 0; 42 int nfsrv_layouthashsize; 43 volatile int nfsrv_layoutcnt = 0; 44 45 extern int newnfs_numnfsd; 46 extern struct nfsstatsv1 nfsstatsv1; 47 extern int nfsrv_lease; 48 extern struct timeval nfsboottime; 49 extern u_int32_t newnfs_true, newnfs_false; 50 extern struct mtx nfsrv_dslock_mtx; 51 extern struct mtx nfsrv_recalllock_mtx; 52 extern struct mtx nfsrv_dontlistlock_mtx; 53 extern int nfsd_debuglevel; 54 extern u_int nfsrv_dsdirsize; 55 extern struct nfsdevicehead nfsrv_devidhead; 56 extern int nfsrv_doflexfile; 57 extern int nfsrv_maxpnfsmirror; 58 NFSV4ROOTLOCKMUTEX; 59 NFSSTATESPINLOCK; 60 extern struct nfsdontlisthead nfsrv_dontlisthead; 61 extern volatile int nfsrv_devidcnt; 62 extern struct nfslayouthead nfsrv_recalllisthead; 63 extern char *nfsrv_zeropnfsdat; 64 65 SYSCTL_DECL(_vfs_nfsd); 66 int nfsrv_statehashsize = NFSSTATEHASHSIZE; 67 SYSCTL_INT(_vfs_nfsd, OID_AUTO, statehashsize, CTLFLAG_RDTUN, 68 &nfsrv_statehashsize, 0, 69 "Size of state hash table set via loader.conf"); 70 71 int nfsrv_clienthashsize = NFSCLIENTHASHSIZE; 72 SYSCTL_INT(_vfs_nfsd, OID_AUTO, clienthashsize, CTLFLAG_RDTUN, 73 &nfsrv_clienthashsize, 0, 74 "Size of client hash table set via loader.conf"); 75 76 int nfsrv_lockhashsize = NFSLOCKHASHSIZE; 77 SYSCTL_INT(_vfs_nfsd, OID_AUTO, fhhashsize, CTLFLAG_RDTUN, 78 &nfsrv_lockhashsize, 0, 79 "Size of file handle hash table set via loader.conf"); 80 81 int nfsrv_sessionhashsize = NFSSESSIONHASHSIZE; 82 SYSCTL_INT(_vfs_nfsd, OID_AUTO, sessionhashsize, CTLFLAG_RDTUN, 83 &nfsrv_sessionhashsize, 0, 84 "Size of session hash table set via loader.conf"); 85 86 int nfsrv_layouthighwater = NFSLAYOUTHIGHWATER; 87 SYSCTL_INT(_vfs_nfsd, OID_AUTO, layouthighwater, CTLFLAG_RDTUN, 88 &nfsrv_layouthighwater, 0, 89 "High water mark for number of layouts set via loader.conf"); 90 91 static int nfsrv_v4statelimit = NFSRV_V4STATELIMIT; 92 SYSCTL_INT(_vfs_nfsd, OID_AUTO, v4statelimit, CTLFLAG_RWTUN, 93 &nfsrv_v4statelimit, 0, 94 "High water limit for NFSv4 opens+locks+delegations"); 95 96 static int nfsrv_writedelegifpos = 0; 97 SYSCTL_INT(_vfs_nfsd, OID_AUTO, writedelegifpos, CTLFLAG_RW, 98 &nfsrv_writedelegifpos, 0, 99 "Issue a write delegation for read opens if possible"); 100 101 static int nfsrv_allowreadforwriteopen = 1; 102 SYSCTL_INT(_vfs_nfsd, OID_AUTO, allowreadforwriteopen, CTLFLAG_RW, 103 &nfsrv_allowreadforwriteopen, 0, 104 "Allow Reads to be done with Write Access StateIDs"); 105 106 int nfsrv_pnfsatime = 0; 107 SYSCTL_INT(_vfs_nfsd, OID_AUTO, pnfsstrictatime, CTLFLAG_RW, 108 &nfsrv_pnfsatime, 0, 109 "For pNFS service, do Getattr ops to keep atime up-to-date"); 110 111 int nfsrv_flexlinuxhack = 0; 112 SYSCTL_INT(_vfs_nfsd, OID_AUTO, flexlinuxhack, CTLFLAG_RW, 113 &nfsrv_flexlinuxhack, 0, 114 "For Linux clients, hack around Flex File Layout bug"); 115 116 /* 117 * Hash lists for nfs V4. 118 */ 119 struct nfsclienthashhead *nfsclienthash; 120 struct nfslockhashhead *nfslockhash; 121 struct nfssessionhash *nfssessionhash; 122 struct nfslayouthash *nfslayouthash; 123 volatile int nfsrv_dontlistlen = 0; 124 #endif /* !APPLEKEXT */ 125 126 static u_int32_t nfsrv_openpluslock = 0, nfsrv_delegatecnt = 0; 127 static time_t nfsrvboottime; 128 static int nfsrv_returnoldstateid = 0, nfsrv_clients = 0; 129 static int nfsrv_clienthighwater = NFSRV_CLIENTHIGHWATER; 130 static int nfsrv_nogsscallback = 0; 131 static volatile int nfsrv_writedelegcnt = 0; 132 static int nfsrv_faildscnt; 133 134 /* local functions */ 135 static void nfsrv_dumpaclient(struct nfsclient *clp, 136 struct nfsd_dumpclients *dumpp); 137 static void nfsrv_freeopenowner(struct nfsstate *stp, int cansleep, 138 NFSPROC_T *p); 139 static int nfsrv_freeopen(struct nfsstate *stp, vnode_t vp, int cansleep, 140 NFSPROC_T *p); 141 static void nfsrv_freelockowner(struct nfsstate *stp, vnode_t vp, int cansleep, 142 NFSPROC_T *p); 143 static void nfsrv_freeallnfslocks(struct nfsstate *stp, vnode_t vp, 144 int cansleep, NFSPROC_T *p); 145 static void nfsrv_freenfslock(struct nfslock *lop); 146 static void nfsrv_freenfslockfile(struct nfslockfile *lfp); 147 static void nfsrv_freedeleg(struct nfsstate *); 148 static int nfsrv_getstate(struct nfsclient *clp, nfsv4stateid_t *stateidp, 149 u_int32_t flags, struct nfsstate **stpp); 150 static void nfsrv_getowner(struct nfsstatehead *hp, struct nfsstate *new_stp, 151 struct nfsstate **stpp); 152 static int nfsrv_getlockfh(vnode_t vp, u_short flags, 153 struct nfslockfile *new_lfp, fhandle_t *nfhp, NFSPROC_T *p); 154 static int nfsrv_getlockfile(u_short flags, struct nfslockfile **new_lfpp, 155 struct nfslockfile **lfpp, fhandle_t *nfhp, int lockit); 156 static void nfsrv_insertlock(struct nfslock *new_lop, 157 struct nfslock *insert_lop, struct nfsstate *stp, struct nfslockfile *lfp); 158 static void nfsrv_updatelock(struct nfsstate *stp, struct nfslock **new_lopp, 159 struct nfslock **other_lopp, struct nfslockfile *lfp); 160 static int nfsrv_getipnumber(u_char *cp); 161 static int nfsrv_checkrestart(nfsquad_t clientid, u_int32_t flags, 162 nfsv4stateid_t *stateidp, int specialid); 163 static int nfsrv_checkgrace(struct nfsrv_descript *nd, struct nfsclient *clp, 164 u_int32_t flags); 165 static int nfsrv_docallback(struct nfsclient *clp, int procnum, 166 nfsv4stateid_t *stateidp, int trunc, fhandle_t *fhp, 167 struct nfsvattr *nap, nfsattrbit_t *attrbitp, int laytype, NFSPROC_T *p); 168 static int nfsrv_cbcallargs(struct nfsrv_descript *nd, struct nfsclient *clp, 169 uint32_t callback, int op, const char *optag, struct nfsdsession **sepp); 170 static u_int32_t nfsrv_nextclientindex(void); 171 static u_int32_t nfsrv_nextstateindex(struct nfsclient *clp); 172 static void nfsrv_markstable(struct nfsclient *clp); 173 static void nfsrv_markreclaim(struct nfsclient *clp); 174 static int nfsrv_checkstable(struct nfsclient *clp); 175 static int nfsrv_clientconflict(struct nfsclient *clp, int *haslockp, struct 176 vnode *vp, NFSPROC_T *p); 177 static int nfsrv_delegconflict(struct nfsstate *stp, int *haslockp, 178 NFSPROC_T *p, vnode_t vp); 179 static int nfsrv_cleandeleg(vnode_t vp, struct nfslockfile *lfp, 180 struct nfsclient *clp, int *haslockp, NFSPROC_T *p); 181 static int nfsrv_notsamecredname(struct nfsrv_descript *nd, 182 struct nfsclient *clp); 183 static time_t nfsrv_leaseexpiry(void); 184 static void nfsrv_delaydelegtimeout(struct nfsstate *stp); 185 static int nfsrv_checkseqid(struct nfsrv_descript *nd, u_int32_t seqid, 186 struct nfsstate *stp, struct nfsrvcache *op); 187 static int nfsrv_nootherstate(struct nfsstate *stp); 188 static int nfsrv_locallock(vnode_t vp, struct nfslockfile *lfp, int flags, 189 uint64_t first, uint64_t end, struct nfslockconflict *cfp, NFSPROC_T *p); 190 static void nfsrv_localunlock(vnode_t vp, struct nfslockfile *lfp, 191 uint64_t init_first, uint64_t init_end, NFSPROC_T *p); 192 static int nfsrv_dolocal(vnode_t vp, struct nfslockfile *lfp, int flags, 193 int oldflags, uint64_t first, uint64_t end, struct nfslockconflict *cfp, 194 NFSPROC_T *p); 195 static void nfsrv_locallock_rollback(vnode_t vp, struct nfslockfile *lfp, 196 NFSPROC_T *p); 197 static void nfsrv_locallock_commit(struct nfslockfile *lfp, int flags, 198 uint64_t first, uint64_t end); 199 static void nfsrv_locklf(struct nfslockfile *lfp); 200 static void nfsrv_unlocklf(struct nfslockfile *lfp); 201 static struct nfsdsession *nfsrv_findsession(uint8_t *sessionid); 202 static int nfsrv_freesession(struct nfsdsession *sep, uint8_t *sessionid); 203 static int nfsv4_setcbsequence(struct nfsrv_descript *nd, struct nfsclient *clp, 204 int dont_replycache, struct nfsdsession **sepp); 205 static int nfsv4_getcbsession(struct nfsclient *clp, struct nfsdsession **sepp); 206 static int nfsrv_addlayout(struct nfsrv_descript *nd, struct nfslayout **lypp, 207 nfsv4stateid_t *stateidp, char *layp, int *layoutlenp, NFSPROC_T *p); 208 static void nfsrv_freelayout(struct nfslayouthead *lhp, struct nfslayout *lyp); 209 static void nfsrv_freelayoutlist(nfsquad_t clientid); 210 static void nfsrv_freelayouts(nfsquad_t *clid, fsid_t *fs, int laytype, 211 int iomode); 212 static void nfsrv_freealllayouts(void); 213 static void nfsrv_freedevid(struct nfsdevice *ds); 214 static int nfsrv_setdsserver(char *dspathp, char *mdspathp, NFSPROC_T *p, 215 struct nfsdevice **dsp); 216 static int nfsrv_delds(char *devid, NFSPROC_T *p); 217 static void nfsrv_deleteds(struct nfsdevice *fndds); 218 static void nfsrv_allocdevid(struct nfsdevice *ds, char *addr, char *dnshost); 219 static void nfsrv_freealldevids(void); 220 static void nfsrv_flexlayouterr(struct nfsrv_descript *nd, uint32_t *layp, 221 int maxcnt, NFSPROC_T *p); 222 static int nfsrv_recalllayout(nfsquad_t clid, nfsv4stateid_t *stateidp, 223 fhandle_t *fhp, struct nfslayout *lyp, struct nfslayouthead *lyheadp, 224 int laytype, NFSPROC_T *p); 225 static int nfsrv_findlayout(nfsquad_t *clientidp, fhandle_t *fhp, int laytype, 226 NFSPROC_T *, struct nfslayout **lypp); 227 static int nfsrv_fndclid(nfsquad_t *clidvec, nfsquad_t clid, int clidcnt); 228 static struct nfslayout *nfsrv_filelayout(struct nfsrv_descript *nd, int iomode, 229 fhandle_t *fhp, fhandle_t *dsfhp, char *devid, fsid_t fs); 230 static struct nfslayout *nfsrv_flexlayout(struct nfsrv_descript *nd, int iomode, 231 int mirrorcnt, fhandle_t *fhp, fhandle_t *dsfhp, char *devid, fsid_t fs); 232 static int nfsrv_dontlayout(fhandle_t *fhp); 233 static int nfsrv_createdsfile(vnode_t vp, fhandle_t *fhp, struct pnfsdsfile *pf, 234 vnode_t dvp, struct nfsdevice *ds, struct ucred *cred, NFSPROC_T *p, 235 vnode_t *tvpp); 236 static struct nfsdevice *nfsrv_findmirroredds(struct nfsmount *nmp); 237 238 /* 239 * Scan the client list for a match and either return the current one, 240 * create a new entry or return an error. 241 * If returning a non-error, the clp structure must either be linked into 242 * the client list or free'd. 243 */ 244 APPLESTATIC int 245 nfsrv_setclient(struct nfsrv_descript *nd, struct nfsclient **new_clpp, 246 nfsquad_t *clientidp, nfsquad_t *confirmp, NFSPROC_T *p) 247 { 248 struct nfsclient *clp = NULL, *new_clp = *new_clpp; 249 int i, error = 0, ret; 250 struct nfsstate *stp, *tstp; 251 struct sockaddr_in *sad, *rad; 252 struct nfsdsession *sep, *nsep; 253 int zapit = 0, gotit, hasstate = 0, igotlock; 254 static u_int64_t confirm_index = 0; 255 256 /* 257 * Check for state resource limit exceeded. 258 */ 259 if (nfsrv_openpluslock > nfsrv_v4statelimit) { 260 error = NFSERR_RESOURCE; 261 goto out; 262 } 263 264 if (nfsrv_issuedelegs == 0 || 265 ((nd->nd_flag & ND_GSS) != 0 && nfsrv_nogsscallback != 0)) 266 /* 267 * Don't do callbacks when delegations are disabled or 268 * for AUTH_GSS unless enabled via nfsrv_nogsscallback. 269 * If establishing a callback connection is attempted 270 * when a firewall is blocking the callback path, the 271 * server may wait too long for the connect attempt to 272 * succeed during the Open. Some clients, such as Linux, 273 * may timeout and give up on the Open before the server 274 * replies. Also, since AUTH_GSS callbacks are not 275 * yet interoperability tested, they might cause the 276 * server to crap out, if they get past the Init call to 277 * the client. 278 */ 279 new_clp->lc_program = 0; 280 281 /* Lock out other nfsd threads */ 282 NFSLOCKV4ROOTMUTEX(); 283 nfsv4_relref(&nfsv4rootfs_lock); 284 do { 285 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 286 NFSV4ROOTLOCKMUTEXPTR, NULL); 287 } while (!igotlock); 288 NFSUNLOCKV4ROOTMUTEX(); 289 290 /* 291 * Search for a match in the client list. 292 */ 293 gotit = i = 0; 294 while (i < nfsrv_clienthashsize && !gotit) { 295 LIST_FOREACH(clp, &nfsclienthash[i], lc_hash) { 296 if (new_clp->lc_idlen == clp->lc_idlen && 297 !NFSBCMP(new_clp->lc_id, clp->lc_id, clp->lc_idlen)) { 298 gotit = 1; 299 break; 300 } 301 } 302 if (gotit == 0) 303 i++; 304 } 305 if (!gotit || 306 (clp->lc_flags & (LCL_NEEDSCONFIRM | LCL_ADMINREVOKED))) { 307 if ((nd->nd_flag & ND_NFSV41) != 0 && confirmp->lval[1] != 0) { 308 /* 309 * For NFSv4.1, if confirmp->lval[1] is non-zero, the 310 * client is trying to update a confirmed clientid. 311 */ 312 NFSLOCKV4ROOTMUTEX(); 313 nfsv4_unlock(&nfsv4rootfs_lock, 1); 314 NFSUNLOCKV4ROOTMUTEX(); 315 confirmp->lval[1] = 0; 316 error = NFSERR_NOENT; 317 goto out; 318 } 319 /* 320 * Get rid of the old one. 321 */ 322 if (i != nfsrv_clienthashsize) { 323 LIST_REMOVE(clp, lc_hash); 324 nfsrv_cleanclient(clp, p); 325 nfsrv_freedeleglist(&clp->lc_deleg); 326 nfsrv_freedeleglist(&clp->lc_olddeleg); 327 zapit = 1; 328 } 329 /* 330 * Add it after assigning a client id to it. 331 */ 332 new_clp->lc_flags |= LCL_NEEDSCONFIRM; 333 if ((nd->nd_flag & ND_NFSV41) != 0) 334 new_clp->lc_confirm.lval[0] = confirmp->lval[0] = 335 ++confirm_index; 336 else 337 confirmp->qval = new_clp->lc_confirm.qval = 338 ++confirm_index; 339 clientidp->lval[0] = new_clp->lc_clientid.lval[0] = 340 (u_int32_t)nfsrvboottime; 341 clientidp->lval[1] = new_clp->lc_clientid.lval[1] = 342 nfsrv_nextclientindex(); 343 new_clp->lc_stateindex = 0; 344 new_clp->lc_statemaxindex = 0; 345 new_clp->lc_cbref = 0; 346 new_clp->lc_expiry = nfsrv_leaseexpiry(); 347 LIST_INIT(&new_clp->lc_open); 348 LIST_INIT(&new_clp->lc_deleg); 349 LIST_INIT(&new_clp->lc_olddeleg); 350 LIST_INIT(&new_clp->lc_session); 351 for (i = 0; i < nfsrv_statehashsize; i++) 352 LIST_INIT(&new_clp->lc_stateid[i]); 353 LIST_INSERT_HEAD(NFSCLIENTHASH(new_clp->lc_clientid), new_clp, 354 lc_hash); 355 nfsstatsv1.srvclients++; 356 nfsrv_openpluslock++; 357 nfsrv_clients++; 358 NFSLOCKV4ROOTMUTEX(); 359 nfsv4_unlock(&nfsv4rootfs_lock, 1); 360 NFSUNLOCKV4ROOTMUTEX(); 361 if (zapit) 362 nfsrv_zapclient(clp, p); 363 *new_clpp = NULL; 364 goto out; 365 } 366 367 /* 368 * Now, handle the cases where the id is already issued. 369 */ 370 if (nfsrv_notsamecredname(nd, clp)) { 371 /* 372 * Check to see if there is expired state that should go away. 373 */ 374 if (clp->lc_expiry < NFSD_MONOSEC && 375 (!LIST_EMPTY(&clp->lc_open) || !LIST_EMPTY(&clp->lc_deleg))) { 376 nfsrv_cleanclient(clp, p); 377 nfsrv_freedeleglist(&clp->lc_deleg); 378 } 379 380 /* 381 * If there is outstanding state, then reply NFSERR_CLIDINUSE per 382 * RFC3530 Sec. 8.1.2 last para. 383 */ 384 if (!LIST_EMPTY(&clp->lc_deleg)) { 385 hasstate = 1; 386 } else if (LIST_EMPTY(&clp->lc_open)) { 387 hasstate = 0; 388 } else { 389 hasstate = 0; 390 /* Look for an Open on the OpenOwner */ 391 LIST_FOREACH(stp, &clp->lc_open, ls_list) { 392 if (!LIST_EMPTY(&stp->ls_open)) { 393 hasstate = 1; 394 break; 395 } 396 } 397 } 398 if (hasstate) { 399 /* 400 * If the uid doesn't match, return NFSERR_CLIDINUSE after 401 * filling out the correct ipaddr and portnum. 402 */ 403 sad = NFSSOCKADDR(new_clp->lc_req.nr_nam, struct sockaddr_in *); 404 rad = NFSSOCKADDR(clp->lc_req.nr_nam, struct sockaddr_in *); 405 sad->sin_addr.s_addr = rad->sin_addr.s_addr; 406 sad->sin_port = rad->sin_port; 407 NFSLOCKV4ROOTMUTEX(); 408 nfsv4_unlock(&nfsv4rootfs_lock, 1); 409 NFSUNLOCKV4ROOTMUTEX(); 410 error = NFSERR_CLIDINUSE; 411 goto out; 412 } 413 } 414 415 if (NFSBCMP(new_clp->lc_verf, clp->lc_verf, NFSX_VERF)) { 416 /* 417 * If the verifier has changed, the client has rebooted 418 * and a new client id is issued. The old state info 419 * can be thrown away once the SETCLIENTID_CONFIRM occurs. 420 */ 421 LIST_REMOVE(clp, lc_hash); 422 423 /* Get rid of all sessions on this clientid. */ 424 LIST_FOREACH_SAFE(sep, &clp->lc_session, sess_list, nsep) { 425 ret = nfsrv_freesession(sep, NULL); 426 if (ret != 0) 427 printf("nfsrv_setclient: verifier changed free" 428 " session failed=%d\n", ret); 429 } 430 431 new_clp->lc_flags |= LCL_NEEDSCONFIRM; 432 if ((nd->nd_flag & ND_NFSV41) != 0) 433 new_clp->lc_confirm.lval[0] = confirmp->lval[0] = 434 ++confirm_index; 435 else 436 confirmp->qval = new_clp->lc_confirm.qval = 437 ++confirm_index; 438 clientidp->lval[0] = new_clp->lc_clientid.lval[0] = 439 nfsrvboottime; 440 clientidp->lval[1] = new_clp->lc_clientid.lval[1] = 441 nfsrv_nextclientindex(); 442 new_clp->lc_stateindex = 0; 443 new_clp->lc_statemaxindex = 0; 444 new_clp->lc_cbref = 0; 445 new_clp->lc_expiry = nfsrv_leaseexpiry(); 446 447 /* 448 * Save the state until confirmed. 449 */ 450 LIST_NEWHEAD(&new_clp->lc_open, &clp->lc_open, ls_list); 451 LIST_FOREACH(tstp, &new_clp->lc_open, ls_list) 452 tstp->ls_clp = new_clp; 453 LIST_NEWHEAD(&new_clp->lc_deleg, &clp->lc_deleg, ls_list); 454 LIST_FOREACH(tstp, &new_clp->lc_deleg, ls_list) 455 tstp->ls_clp = new_clp; 456 LIST_NEWHEAD(&new_clp->lc_olddeleg, &clp->lc_olddeleg, 457 ls_list); 458 LIST_FOREACH(tstp, &new_clp->lc_olddeleg, ls_list) 459 tstp->ls_clp = new_clp; 460 for (i = 0; i < nfsrv_statehashsize; i++) { 461 LIST_NEWHEAD(&new_clp->lc_stateid[i], 462 &clp->lc_stateid[i], ls_hash); 463 LIST_FOREACH(tstp, &new_clp->lc_stateid[i], ls_hash) 464 tstp->ls_clp = new_clp; 465 } 466 LIST_INIT(&new_clp->lc_session); 467 LIST_INSERT_HEAD(NFSCLIENTHASH(new_clp->lc_clientid), new_clp, 468 lc_hash); 469 nfsstatsv1.srvclients++; 470 nfsrv_openpluslock++; 471 nfsrv_clients++; 472 NFSLOCKV4ROOTMUTEX(); 473 nfsv4_unlock(&nfsv4rootfs_lock, 1); 474 NFSUNLOCKV4ROOTMUTEX(); 475 476 /* 477 * Must wait until any outstanding callback on the old clp 478 * completes. 479 */ 480 NFSLOCKSTATE(); 481 while (clp->lc_cbref) { 482 clp->lc_flags |= LCL_WAKEUPWANTED; 483 (void)mtx_sleep(clp, NFSSTATEMUTEXPTR, PZERO - 1, 484 "nfsd clp", 10 * hz); 485 } 486 NFSUNLOCKSTATE(); 487 nfsrv_zapclient(clp, p); 488 *new_clpp = NULL; 489 goto out; 490 } 491 492 /* For NFSv4.1, mark that we found a confirmed clientid. */ 493 if ((nd->nd_flag & ND_NFSV41) != 0) { 494 clientidp->lval[0] = clp->lc_clientid.lval[0]; 495 clientidp->lval[1] = clp->lc_clientid.lval[1]; 496 confirmp->lval[0] = 0; /* Ignored by client */ 497 confirmp->lval[1] = 1; 498 } else { 499 /* 500 * id and verifier match, so update the net address info 501 * and get rid of any existing callback authentication 502 * handle, so a new one will be acquired. 503 */ 504 LIST_REMOVE(clp, lc_hash); 505 new_clp->lc_flags |= (LCL_NEEDSCONFIRM | LCL_DONTCLEAN); 506 new_clp->lc_expiry = nfsrv_leaseexpiry(); 507 confirmp->qval = new_clp->lc_confirm.qval = ++confirm_index; 508 clientidp->lval[0] = new_clp->lc_clientid.lval[0] = 509 clp->lc_clientid.lval[0]; 510 clientidp->lval[1] = new_clp->lc_clientid.lval[1] = 511 clp->lc_clientid.lval[1]; 512 new_clp->lc_delegtime = clp->lc_delegtime; 513 new_clp->lc_stateindex = clp->lc_stateindex; 514 new_clp->lc_statemaxindex = clp->lc_statemaxindex; 515 new_clp->lc_cbref = 0; 516 LIST_NEWHEAD(&new_clp->lc_open, &clp->lc_open, ls_list); 517 LIST_FOREACH(tstp, &new_clp->lc_open, ls_list) 518 tstp->ls_clp = new_clp; 519 LIST_NEWHEAD(&new_clp->lc_deleg, &clp->lc_deleg, ls_list); 520 LIST_FOREACH(tstp, &new_clp->lc_deleg, ls_list) 521 tstp->ls_clp = new_clp; 522 LIST_NEWHEAD(&new_clp->lc_olddeleg, &clp->lc_olddeleg, ls_list); 523 LIST_FOREACH(tstp, &new_clp->lc_olddeleg, ls_list) 524 tstp->ls_clp = new_clp; 525 for (i = 0; i < nfsrv_statehashsize; i++) { 526 LIST_NEWHEAD(&new_clp->lc_stateid[i], 527 &clp->lc_stateid[i], ls_hash); 528 LIST_FOREACH(tstp, &new_clp->lc_stateid[i], ls_hash) 529 tstp->ls_clp = new_clp; 530 } 531 LIST_INIT(&new_clp->lc_session); 532 LIST_INSERT_HEAD(NFSCLIENTHASH(new_clp->lc_clientid), new_clp, 533 lc_hash); 534 nfsstatsv1.srvclients++; 535 nfsrv_openpluslock++; 536 nfsrv_clients++; 537 } 538 NFSLOCKV4ROOTMUTEX(); 539 nfsv4_unlock(&nfsv4rootfs_lock, 1); 540 NFSUNLOCKV4ROOTMUTEX(); 541 542 if ((nd->nd_flag & ND_NFSV41) == 0) { 543 /* 544 * Must wait until any outstanding callback on the old clp 545 * completes. 546 */ 547 NFSLOCKSTATE(); 548 while (clp->lc_cbref) { 549 clp->lc_flags |= LCL_WAKEUPWANTED; 550 (void)mtx_sleep(clp, NFSSTATEMUTEXPTR, PZERO - 1, 551 "nfsdclp", 10 * hz); 552 } 553 NFSUNLOCKSTATE(); 554 nfsrv_zapclient(clp, p); 555 *new_clpp = NULL; 556 } 557 558 out: 559 NFSEXITCODE2(error, nd); 560 return (error); 561 } 562 563 /* 564 * Check to see if the client id exists and optionally confirm it. 565 */ 566 APPLESTATIC int 567 nfsrv_getclient(nfsquad_t clientid, int opflags, struct nfsclient **clpp, 568 struct nfsdsession *nsep, nfsquad_t confirm, uint32_t cbprogram, 569 struct nfsrv_descript *nd, NFSPROC_T *p) 570 { 571 struct nfsclient *clp; 572 struct nfsstate *stp; 573 int i; 574 struct nfsclienthashhead *hp; 575 int error = 0, igotlock, doneok; 576 struct nfssessionhash *shp; 577 struct nfsdsession *sep; 578 uint64_t sessid[2]; 579 static uint64_t next_sess = 0; 580 581 if (clpp) 582 *clpp = NULL; 583 if ((nd == NULL || (nd->nd_flag & ND_NFSV41) == 0 || 584 opflags != CLOPS_RENEW) && nfsrvboottime != clientid.lval[0]) { 585 error = NFSERR_STALECLIENTID; 586 goto out; 587 } 588 589 /* 590 * If called with opflags == CLOPS_RENEW, the State Lock is 591 * already held. Otherwise, we need to get either that or, 592 * for the case of Confirm, lock out the nfsd threads. 593 */ 594 if (opflags & CLOPS_CONFIRM) { 595 NFSLOCKV4ROOTMUTEX(); 596 nfsv4_relref(&nfsv4rootfs_lock); 597 do { 598 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 599 NFSV4ROOTLOCKMUTEXPTR, NULL); 600 } while (!igotlock); 601 /* 602 * Create a new sessionid here, since we need to do it where 603 * there is a mutex held to serialize update of next_sess. 604 */ 605 if ((nd->nd_flag & ND_NFSV41) != 0) { 606 sessid[0] = ++next_sess; 607 sessid[1] = clientid.qval; 608 } 609 NFSUNLOCKV4ROOTMUTEX(); 610 } else if (opflags != CLOPS_RENEW) { 611 NFSLOCKSTATE(); 612 } 613 614 /* For NFSv4.1, the clp is acquired from the associated session. */ 615 if (nd != NULL && (nd->nd_flag & ND_NFSV41) != 0 && 616 opflags == CLOPS_RENEW) { 617 clp = NULL; 618 if ((nd->nd_flag & ND_HASSEQUENCE) != 0) { 619 shp = NFSSESSIONHASH(nd->nd_sessionid); 620 NFSLOCKSESSION(shp); 621 sep = nfsrv_findsession(nd->nd_sessionid); 622 if (sep != NULL) 623 clp = sep->sess_clp; 624 NFSUNLOCKSESSION(shp); 625 } 626 } else { 627 hp = NFSCLIENTHASH(clientid); 628 LIST_FOREACH(clp, hp, lc_hash) { 629 if (clp->lc_clientid.lval[1] == clientid.lval[1]) 630 break; 631 } 632 } 633 if (clp == NULL) { 634 if (opflags & CLOPS_CONFIRM) 635 error = NFSERR_STALECLIENTID; 636 else 637 error = NFSERR_EXPIRED; 638 } else if (clp->lc_flags & LCL_ADMINREVOKED) { 639 /* 640 * If marked admin revoked, just return the error. 641 */ 642 error = NFSERR_ADMINREVOKED; 643 } 644 if (error) { 645 if (opflags & CLOPS_CONFIRM) { 646 NFSLOCKV4ROOTMUTEX(); 647 nfsv4_unlock(&nfsv4rootfs_lock, 1); 648 NFSUNLOCKV4ROOTMUTEX(); 649 } else if (opflags != CLOPS_RENEW) { 650 NFSUNLOCKSTATE(); 651 } 652 goto out; 653 } 654 655 /* 656 * Perform any operations specified by the opflags. 657 */ 658 if (opflags & CLOPS_CONFIRM) { 659 if (((nd->nd_flag & ND_NFSV41) != 0 && 660 clp->lc_confirm.lval[0] != confirm.lval[0]) || 661 ((nd->nd_flag & ND_NFSV41) == 0 && 662 clp->lc_confirm.qval != confirm.qval)) 663 error = NFSERR_STALECLIENTID; 664 else if (nfsrv_notsamecredname(nd, clp)) 665 error = NFSERR_CLIDINUSE; 666 667 if (!error) { 668 if ((clp->lc_flags & (LCL_NEEDSCONFIRM | LCL_DONTCLEAN)) == 669 LCL_NEEDSCONFIRM) { 670 /* 671 * Hang onto the delegations (as old delegations) 672 * for an Open with CLAIM_DELEGATE_PREV unless in 673 * grace, but get rid of the rest of the state. 674 */ 675 nfsrv_cleanclient(clp, p); 676 nfsrv_freedeleglist(&clp->lc_olddeleg); 677 if (nfsrv_checkgrace(nd, clp, 0)) { 678 /* In grace, so just delete delegations */ 679 nfsrv_freedeleglist(&clp->lc_deleg); 680 } else { 681 LIST_FOREACH(stp, &clp->lc_deleg, ls_list) 682 stp->ls_flags |= NFSLCK_OLDDELEG; 683 clp->lc_delegtime = NFSD_MONOSEC + 684 nfsrv_lease + NFSRV_LEASEDELTA; 685 LIST_NEWHEAD(&clp->lc_olddeleg, &clp->lc_deleg, 686 ls_list); 687 } 688 if ((nd->nd_flag & ND_NFSV41) != 0) 689 clp->lc_program = cbprogram; 690 } 691 clp->lc_flags &= ~(LCL_NEEDSCONFIRM | LCL_DONTCLEAN); 692 if (clp->lc_program) 693 clp->lc_flags |= LCL_NEEDSCBNULL; 694 /* For NFSv4.1, link the session onto the client. */ 695 if (nsep != NULL) { 696 /* Hold a reference on the xprt for a backchannel. */ 697 if ((nsep->sess_crflags & NFSV4CRSESS_CONNBACKCHAN) 698 != 0) { 699 if (clp->lc_req.nr_client == NULL) 700 clp->lc_req.nr_client = (struct __rpc_client *) 701 clnt_bck_create(nd->nd_xprt->xp_socket, 702 cbprogram, NFSV4_CBVERS); 703 if (clp->lc_req.nr_client != NULL) { 704 SVC_ACQUIRE(nd->nd_xprt); 705 nd->nd_xprt->xp_p2 = 706 clp->lc_req.nr_client->cl_private; 707 /* Disable idle timeout. */ 708 nd->nd_xprt->xp_idletimeout = 0; 709 nsep->sess_cbsess.nfsess_xprt = nd->nd_xprt; 710 } else 711 nsep->sess_crflags &= ~NFSV4CRSESS_CONNBACKCHAN; 712 } 713 NFSBCOPY(sessid, nsep->sess_sessionid, 714 NFSX_V4SESSIONID); 715 NFSBCOPY(sessid, nsep->sess_cbsess.nfsess_sessionid, 716 NFSX_V4SESSIONID); 717 shp = NFSSESSIONHASH(nsep->sess_sessionid); 718 NFSLOCKSTATE(); 719 NFSLOCKSESSION(shp); 720 LIST_INSERT_HEAD(&shp->list, nsep, sess_hash); 721 LIST_INSERT_HEAD(&clp->lc_session, nsep, sess_list); 722 nsep->sess_clp = clp; 723 NFSUNLOCKSESSION(shp); 724 NFSUNLOCKSTATE(); 725 } 726 } 727 } else if (clp->lc_flags & LCL_NEEDSCONFIRM) { 728 error = NFSERR_EXPIRED; 729 } 730 731 /* 732 * If called by the Renew Op, we must check the principal. 733 */ 734 if (!error && (opflags & CLOPS_RENEWOP)) { 735 if (nfsrv_notsamecredname(nd, clp)) { 736 doneok = 0; 737 for (i = 0; i < nfsrv_statehashsize && doneok == 0; i++) { 738 LIST_FOREACH(stp, &clp->lc_stateid[i], ls_hash) { 739 if ((stp->ls_flags & NFSLCK_OPEN) && 740 stp->ls_uid == nd->nd_cred->cr_uid) { 741 doneok = 1; 742 break; 743 } 744 } 745 } 746 if (!doneok) 747 error = NFSERR_ACCES; 748 } 749 if (!error && (clp->lc_flags & LCL_CBDOWN)) 750 error = NFSERR_CBPATHDOWN; 751 } 752 if ((!error || error == NFSERR_CBPATHDOWN) && 753 (opflags & CLOPS_RENEW)) { 754 clp->lc_expiry = nfsrv_leaseexpiry(); 755 } 756 if (opflags & CLOPS_CONFIRM) { 757 NFSLOCKV4ROOTMUTEX(); 758 nfsv4_unlock(&nfsv4rootfs_lock, 1); 759 NFSUNLOCKV4ROOTMUTEX(); 760 } else if (opflags != CLOPS_RENEW) { 761 NFSUNLOCKSTATE(); 762 } 763 if (clpp) 764 *clpp = clp; 765 766 out: 767 NFSEXITCODE2(error, nd); 768 return (error); 769 } 770 771 /* 772 * Perform the NFSv4.1 destroy clientid. 773 */ 774 int 775 nfsrv_destroyclient(nfsquad_t clientid, NFSPROC_T *p) 776 { 777 struct nfsclient *clp; 778 struct nfsclienthashhead *hp; 779 int error = 0, i, igotlock; 780 781 if (nfsrvboottime != clientid.lval[0]) { 782 error = NFSERR_STALECLIENTID; 783 goto out; 784 } 785 786 /* Lock out other nfsd threads */ 787 NFSLOCKV4ROOTMUTEX(); 788 nfsv4_relref(&nfsv4rootfs_lock); 789 do { 790 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 791 NFSV4ROOTLOCKMUTEXPTR, NULL); 792 } while (igotlock == 0); 793 NFSUNLOCKV4ROOTMUTEX(); 794 795 hp = NFSCLIENTHASH(clientid); 796 LIST_FOREACH(clp, hp, lc_hash) { 797 if (clp->lc_clientid.lval[1] == clientid.lval[1]) 798 break; 799 } 800 if (clp == NULL) { 801 NFSLOCKV4ROOTMUTEX(); 802 nfsv4_unlock(&nfsv4rootfs_lock, 1); 803 NFSUNLOCKV4ROOTMUTEX(); 804 /* Just return ok, since it is gone. */ 805 goto out; 806 } 807 808 /* 809 * Free up all layouts on the clientid. Should the client return the 810 * layouts? 811 */ 812 nfsrv_freelayoutlist(clientid); 813 814 /* Scan for state on the clientid. */ 815 for (i = 0; i < nfsrv_statehashsize; i++) 816 if (!LIST_EMPTY(&clp->lc_stateid[i])) { 817 NFSLOCKV4ROOTMUTEX(); 818 nfsv4_unlock(&nfsv4rootfs_lock, 1); 819 NFSUNLOCKV4ROOTMUTEX(); 820 error = NFSERR_CLIENTIDBUSY; 821 goto out; 822 } 823 if (!LIST_EMPTY(&clp->lc_session) || !LIST_EMPTY(&clp->lc_deleg)) { 824 NFSLOCKV4ROOTMUTEX(); 825 nfsv4_unlock(&nfsv4rootfs_lock, 1); 826 NFSUNLOCKV4ROOTMUTEX(); 827 error = NFSERR_CLIENTIDBUSY; 828 goto out; 829 } 830 831 /* Destroy the clientid and return ok. */ 832 nfsrv_cleanclient(clp, p); 833 nfsrv_freedeleglist(&clp->lc_deleg); 834 nfsrv_freedeleglist(&clp->lc_olddeleg); 835 LIST_REMOVE(clp, lc_hash); 836 NFSLOCKV4ROOTMUTEX(); 837 nfsv4_unlock(&nfsv4rootfs_lock, 1); 838 NFSUNLOCKV4ROOTMUTEX(); 839 nfsrv_zapclient(clp, p); 840 out: 841 NFSEXITCODE2(error, nd); 842 return (error); 843 } 844 845 /* 846 * Called from the new nfssvc syscall to admin revoke a clientid. 847 * Returns 0 for success, error otherwise. 848 */ 849 APPLESTATIC int 850 nfsrv_adminrevoke(struct nfsd_clid *revokep, NFSPROC_T *p) 851 { 852 struct nfsclient *clp = NULL; 853 int i, error = 0; 854 int gotit, igotlock; 855 856 /* 857 * First, lock out the nfsd so that state won't change while the 858 * revocation record is being written to the stable storage restart 859 * file. 860 */ 861 NFSLOCKV4ROOTMUTEX(); 862 do { 863 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 864 NFSV4ROOTLOCKMUTEXPTR, NULL); 865 } while (!igotlock); 866 NFSUNLOCKV4ROOTMUTEX(); 867 868 /* 869 * Search for a match in the client list. 870 */ 871 gotit = i = 0; 872 while (i < nfsrv_clienthashsize && !gotit) { 873 LIST_FOREACH(clp, &nfsclienthash[i], lc_hash) { 874 if (revokep->nclid_idlen == clp->lc_idlen && 875 !NFSBCMP(revokep->nclid_id, clp->lc_id, clp->lc_idlen)) { 876 gotit = 1; 877 break; 878 } 879 } 880 i++; 881 } 882 if (!gotit) { 883 NFSLOCKV4ROOTMUTEX(); 884 nfsv4_unlock(&nfsv4rootfs_lock, 0); 885 NFSUNLOCKV4ROOTMUTEX(); 886 error = EPERM; 887 goto out; 888 } 889 890 /* 891 * Now, write out the revocation record 892 */ 893 nfsrv_writestable(clp->lc_id, clp->lc_idlen, NFSNST_REVOKE, p); 894 nfsrv_backupstable(); 895 896 /* 897 * and clear out the state, marking the clientid revoked. 898 */ 899 clp->lc_flags &= ~LCL_CALLBACKSON; 900 clp->lc_flags |= LCL_ADMINREVOKED; 901 nfsrv_cleanclient(clp, p); 902 nfsrv_freedeleglist(&clp->lc_deleg); 903 nfsrv_freedeleglist(&clp->lc_olddeleg); 904 NFSLOCKV4ROOTMUTEX(); 905 nfsv4_unlock(&nfsv4rootfs_lock, 0); 906 NFSUNLOCKV4ROOTMUTEX(); 907 908 out: 909 NFSEXITCODE(error); 910 return (error); 911 } 912 913 /* 914 * Dump out stats for all clients. Called from nfssvc(2), that is used 915 * nfsstatsv1. 916 */ 917 APPLESTATIC void 918 nfsrv_dumpclients(struct nfsd_dumpclients *dumpp, int maxcnt) 919 { 920 struct nfsclient *clp; 921 int i = 0, cnt = 0; 922 923 /* 924 * First, get a reference on the nfsv4rootfs_lock so that an 925 * exclusive lock cannot be acquired while dumping the clients. 926 */ 927 NFSLOCKV4ROOTMUTEX(); 928 nfsv4_getref(&nfsv4rootfs_lock, NULL, NFSV4ROOTLOCKMUTEXPTR, NULL); 929 NFSUNLOCKV4ROOTMUTEX(); 930 NFSLOCKSTATE(); 931 /* 932 * Rattle through the client lists until done. 933 */ 934 while (i < nfsrv_clienthashsize && cnt < maxcnt) { 935 clp = LIST_FIRST(&nfsclienthash[i]); 936 while (clp != LIST_END(&nfsclienthash[i]) && cnt < maxcnt) { 937 nfsrv_dumpaclient(clp, &dumpp[cnt]); 938 cnt++; 939 clp = LIST_NEXT(clp, lc_hash); 940 } 941 i++; 942 } 943 if (cnt < maxcnt) 944 dumpp[cnt].ndcl_clid.nclid_idlen = 0; 945 NFSUNLOCKSTATE(); 946 NFSLOCKV4ROOTMUTEX(); 947 nfsv4_relref(&nfsv4rootfs_lock); 948 NFSUNLOCKV4ROOTMUTEX(); 949 } 950 951 /* 952 * Dump stats for a client. Must be called with the NFSSTATELOCK and spl'd. 953 */ 954 static void 955 nfsrv_dumpaclient(struct nfsclient *clp, struct nfsd_dumpclients *dumpp) 956 { 957 struct nfsstate *stp, *openstp, *lckownstp; 958 struct nfslock *lop; 959 struct sockaddr *sad; 960 struct sockaddr_in *rad; 961 struct sockaddr_in6 *rad6; 962 963 dumpp->ndcl_nopenowners = dumpp->ndcl_nlockowners = 0; 964 dumpp->ndcl_nopens = dumpp->ndcl_nlocks = 0; 965 dumpp->ndcl_ndelegs = dumpp->ndcl_nolddelegs = 0; 966 dumpp->ndcl_flags = clp->lc_flags; 967 dumpp->ndcl_clid.nclid_idlen = clp->lc_idlen; 968 NFSBCOPY(clp->lc_id, dumpp->ndcl_clid.nclid_id, clp->lc_idlen); 969 sad = NFSSOCKADDR(clp->lc_req.nr_nam, struct sockaddr *); 970 dumpp->ndcl_addrfam = sad->sa_family; 971 if (sad->sa_family == AF_INET) { 972 rad = (struct sockaddr_in *)sad; 973 dumpp->ndcl_cbaddr.sin_addr = rad->sin_addr; 974 } else { 975 rad6 = (struct sockaddr_in6 *)sad; 976 dumpp->ndcl_cbaddr.sin6_addr = rad6->sin6_addr; 977 } 978 979 /* 980 * Now, scan the state lists and total up the opens and locks. 981 */ 982 LIST_FOREACH(stp, &clp->lc_open, ls_list) { 983 dumpp->ndcl_nopenowners++; 984 LIST_FOREACH(openstp, &stp->ls_open, ls_list) { 985 dumpp->ndcl_nopens++; 986 LIST_FOREACH(lckownstp, &openstp->ls_open, ls_list) { 987 dumpp->ndcl_nlockowners++; 988 LIST_FOREACH(lop, &lckownstp->ls_lock, lo_lckowner) { 989 dumpp->ndcl_nlocks++; 990 } 991 } 992 } 993 } 994 995 /* 996 * and the delegation lists. 997 */ 998 LIST_FOREACH(stp, &clp->lc_deleg, ls_list) { 999 dumpp->ndcl_ndelegs++; 1000 } 1001 LIST_FOREACH(stp, &clp->lc_olddeleg, ls_list) { 1002 dumpp->ndcl_nolddelegs++; 1003 } 1004 } 1005 1006 /* 1007 * Dump out lock stats for a file. 1008 */ 1009 APPLESTATIC void 1010 nfsrv_dumplocks(vnode_t vp, struct nfsd_dumplocks *ldumpp, int maxcnt, 1011 NFSPROC_T *p) 1012 { 1013 struct nfsstate *stp; 1014 struct nfslock *lop; 1015 int cnt = 0; 1016 struct nfslockfile *lfp; 1017 struct sockaddr *sad; 1018 struct sockaddr_in *rad; 1019 struct sockaddr_in6 *rad6; 1020 int ret; 1021 fhandle_t nfh; 1022 1023 ret = nfsrv_getlockfh(vp, 0, NULL, &nfh, p); 1024 /* 1025 * First, get a reference on the nfsv4rootfs_lock so that an 1026 * exclusive lock on it cannot be acquired while dumping the locks. 1027 */ 1028 NFSLOCKV4ROOTMUTEX(); 1029 nfsv4_getref(&nfsv4rootfs_lock, NULL, NFSV4ROOTLOCKMUTEXPTR, NULL); 1030 NFSUNLOCKV4ROOTMUTEX(); 1031 NFSLOCKSTATE(); 1032 if (!ret) 1033 ret = nfsrv_getlockfile(0, NULL, &lfp, &nfh, 0); 1034 if (ret) { 1035 ldumpp[0].ndlck_clid.nclid_idlen = 0; 1036 NFSUNLOCKSTATE(); 1037 NFSLOCKV4ROOTMUTEX(); 1038 nfsv4_relref(&nfsv4rootfs_lock); 1039 NFSUNLOCKV4ROOTMUTEX(); 1040 return; 1041 } 1042 1043 /* 1044 * For each open share on file, dump it out. 1045 */ 1046 stp = LIST_FIRST(&lfp->lf_open); 1047 while (stp != LIST_END(&lfp->lf_open) && cnt < maxcnt) { 1048 ldumpp[cnt].ndlck_flags = stp->ls_flags; 1049 ldumpp[cnt].ndlck_stateid.seqid = stp->ls_stateid.seqid; 1050 ldumpp[cnt].ndlck_stateid.other[0] = stp->ls_stateid.other[0]; 1051 ldumpp[cnt].ndlck_stateid.other[1] = stp->ls_stateid.other[1]; 1052 ldumpp[cnt].ndlck_stateid.other[2] = stp->ls_stateid.other[2]; 1053 ldumpp[cnt].ndlck_owner.nclid_idlen = 1054 stp->ls_openowner->ls_ownerlen; 1055 NFSBCOPY(stp->ls_openowner->ls_owner, 1056 ldumpp[cnt].ndlck_owner.nclid_id, 1057 stp->ls_openowner->ls_ownerlen); 1058 ldumpp[cnt].ndlck_clid.nclid_idlen = stp->ls_clp->lc_idlen; 1059 NFSBCOPY(stp->ls_clp->lc_id, ldumpp[cnt].ndlck_clid.nclid_id, 1060 stp->ls_clp->lc_idlen); 1061 sad=NFSSOCKADDR(stp->ls_clp->lc_req.nr_nam, struct sockaddr *); 1062 ldumpp[cnt].ndlck_addrfam = sad->sa_family; 1063 if (sad->sa_family == AF_INET) { 1064 rad = (struct sockaddr_in *)sad; 1065 ldumpp[cnt].ndlck_cbaddr.sin_addr = rad->sin_addr; 1066 } else { 1067 rad6 = (struct sockaddr_in6 *)sad; 1068 ldumpp[cnt].ndlck_cbaddr.sin6_addr = rad6->sin6_addr; 1069 } 1070 stp = LIST_NEXT(stp, ls_file); 1071 cnt++; 1072 } 1073 1074 /* 1075 * and all locks. 1076 */ 1077 lop = LIST_FIRST(&lfp->lf_lock); 1078 while (lop != LIST_END(&lfp->lf_lock) && cnt < maxcnt) { 1079 stp = lop->lo_stp; 1080 ldumpp[cnt].ndlck_flags = lop->lo_flags; 1081 ldumpp[cnt].ndlck_first = lop->lo_first; 1082 ldumpp[cnt].ndlck_end = lop->lo_end; 1083 ldumpp[cnt].ndlck_stateid.seqid = stp->ls_stateid.seqid; 1084 ldumpp[cnt].ndlck_stateid.other[0] = stp->ls_stateid.other[0]; 1085 ldumpp[cnt].ndlck_stateid.other[1] = stp->ls_stateid.other[1]; 1086 ldumpp[cnt].ndlck_stateid.other[2] = stp->ls_stateid.other[2]; 1087 ldumpp[cnt].ndlck_owner.nclid_idlen = stp->ls_ownerlen; 1088 NFSBCOPY(stp->ls_owner, ldumpp[cnt].ndlck_owner.nclid_id, 1089 stp->ls_ownerlen); 1090 ldumpp[cnt].ndlck_clid.nclid_idlen = stp->ls_clp->lc_idlen; 1091 NFSBCOPY(stp->ls_clp->lc_id, ldumpp[cnt].ndlck_clid.nclid_id, 1092 stp->ls_clp->lc_idlen); 1093 sad=NFSSOCKADDR(stp->ls_clp->lc_req.nr_nam, struct sockaddr *); 1094 ldumpp[cnt].ndlck_addrfam = sad->sa_family; 1095 if (sad->sa_family == AF_INET) { 1096 rad = (struct sockaddr_in *)sad; 1097 ldumpp[cnt].ndlck_cbaddr.sin_addr = rad->sin_addr; 1098 } else { 1099 rad6 = (struct sockaddr_in6 *)sad; 1100 ldumpp[cnt].ndlck_cbaddr.sin6_addr = rad6->sin6_addr; 1101 } 1102 lop = LIST_NEXT(lop, lo_lckfile); 1103 cnt++; 1104 } 1105 1106 /* 1107 * and the delegations. 1108 */ 1109 stp = LIST_FIRST(&lfp->lf_deleg); 1110 while (stp != LIST_END(&lfp->lf_deleg) && cnt < maxcnt) { 1111 ldumpp[cnt].ndlck_flags = stp->ls_flags; 1112 ldumpp[cnt].ndlck_stateid.seqid = stp->ls_stateid.seqid; 1113 ldumpp[cnt].ndlck_stateid.other[0] = stp->ls_stateid.other[0]; 1114 ldumpp[cnt].ndlck_stateid.other[1] = stp->ls_stateid.other[1]; 1115 ldumpp[cnt].ndlck_stateid.other[2] = stp->ls_stateid.other[2]; 1116 ldumpp[cnt].ndlck_owner.nclid_idlen = 0; 1117 ldumpp[cnt].ndlck_clid.nclid_idlen = stp->ls_clp->lc_idlen; 1118 NFSBCOPY(stp->ls_clp->lc_id, ldumpp[cnt].ndlck_clid.nclid_id, 1119 stp->ls_clp->lc_idlen); 1120 sad=NFSSOCKADDR(stp->ls_clp->lc_req.nr_nam, struct sockaddr *); 1121 ldumpp[cnt].ndlck_addrfam = sad->sa_family; 1122 if (sad->sa_family == AF_INET) { 1123 rad = (struct sockaddr_in *)sad; 1124 ldumpp[cnt].ndlck_cbaddr.sin_addr = rad->sin_addr; 1125 } else { 1126 rad6 = (struct sockaddr_in6 *)sad; 1127 ldumpp[cnt].ndlck_cbaddr.sin6_addr = rad6->sin6_addr; 1128 } 1129 stp = LIST_NEXT(stp, ls_file); 1130 cnt++; 1131 } 1132 1133 /* 1134 * If list isn't full, mark end of list by setting the client name 1135 * to zero length. 1136 */ 1137 if (cnt < maxcnt) 1138 ldumpp[cnt].ndlck_clid.nclid_idlen = 0; 1139 NFSUNLOCKSTATE(); 1140 NFSLOCKV4ROOTMUTEX(); 1141 nfsv4_relref(&nfsv4rootfs_lock); 1142 NFSUNLOCKV4ROOTMUTEX(); 1143 } 1144 1145 /* 1146 * Server timer routine. It can scan any linked list, so long 1147 * as it holds the spin/mutex lock and there is no exclusive lock on 1148 * nfsv4rootfs_lock. 1149 * (For OpenBSD, a kthread is ok. For FreeBSD, I think it is ok 1150 * to do this from a callout, since the spin locks work. For 1151 * Darwin, I'm not sure what will work correctly yet.) 1152 * Should be called once per second. 1153 */ 1154 APPLESTATIC void 1155 nfsrv_servertimer(void) 1156 { 1157 struct nfsclient *clp, *nclp; 1158 struct nfsstate *stp, *nstp; 1159 int got_ref, i; 1160 1161 /* 1162 * Make sure nfsboottime is set. This is used by V3 as well 1163 * as V4. Note that nfsboottime is not nfsrvboottime, which is 1164 * only used by the V4 server for leases. 1165 */ 1166 if (nfsboottime.tv_sec == 0) 1167 NFSSETBOOTTIME(nfsboottime); 1168 1169 /* 1170 * If server hasn't started yet, just return. 1171 */ 1172 NFSLOCKSTATE(); 1173 if (nfsrv_stablefirst.nsf_eograce == 0) { 1174 NFSUNLOCKSTATE(); 1175 return; 1176 } 1177 if (!(nfsrv_stablefirst.nsf_flags & NFSNSF_UPDATEDONE)) { 1178 if (!(nfsrv_stablefirst.nsf_flags & NFSNSF_GRACEOVER) && 1179 NFSD_MONOSEC > nfsrv_stablefirst.nsf_eograce) 1180 nfsrv_stablefirst.nsf_flags |= 1181 (NFSNSF_GRACEOVER | NFSNSF_NEEDLOCK); 1182 NFSUNLOCKSTATE(); 1183 return; 1184 } 1185 1186 /* 1187 * Try and get a reference count on the nfsv4rootfs_lock so that 1188 * no nfsd thread can acquire an exclusive lock on it before this 1189 * call is done. If it is already exclusively locked, just return. 1190 */ 1191 NFSLOCKV4ROOTMUTEX(); 1192 got_ref = nfsv4_getref_nonblock(&nfsv4rootfs_lock); 1193 NFSUNLOCKV4ROOTMUTEX(); 1194 if (got_ref == 0) { 1195 NFSUNLOCKSTATE(); 1196 return; 1197 } 1198 1199 /* 1200 * For each client... 1201 */ 1202 for (i = 0; i < nfsrv_clienthashsize; i++) { 1203 clp = LIST_FIRST(&nfsclienthash[i]); 1204 while (clp != LIST_END(&nfsclienthash[i])) { 1205 nclp = LIST_NEXT(clp, lc_hash); 1206 if (!(clp->lc_flags & LCL_EXPIREIT)) { 1207 if (((clp->lc_expiry + NFSRV_STALELEASE) < NFSD_MONOSEC 1208 && ((LIST_EMPTY(&clp->lc_deleg) 1209 && LIST_EMPTY(&clp->lc_open)) || 1210 nfsrv_clients > nfsrv_clienthighwater)) || 1211 (clp->lc_expiry + NFSRV_MOULDYLEASE) < NFSD_MONOSEC || 1212 (clp->lc_expiry < NFSD_MONOSEC && 1213 (nfsrv_openpluslock * 10 / 9) > nfsrv_v4statelimit)) { 1214 /* 1215 * Lease has expired several nfsrv_lease times ago: 1216 * PLUS 1217 * - no state is associated with it 1218 * OR 1219 * - above high water mark for number of clients 1220 * (nfsrv_clienthighwater should be large enough 1221 * that this only occurs when clients fail to 1222 * use the same nfs_client_id4.id. Maybe somewhat 1223 * higher that the maximum number of clients that 1224 * will mount this server?) 1225 * OR 1226 * Lease has expired a very long time ago 1227 * OR 1228 * Lease has expired PLUS the number of opens + locks 1229 * has exceeded 90% of capacity 1230 * 1231 * --> Mark for expiry. The actual expiry will be done 1232 * by an nfsd sometime soon. 1233 */ 1234 clp->lc_flags |= LCL_EXPIREIT; 1235 nfsrv_stablefirst.nsf_flags |= 1236 (NFSNSF_NEEDLOCK | NFSNSF_EXPIREDCLIENT); 1237 } else { 1238 /* 1239 * If there are no opens, increment no open tick cnt 1240 * If time exceeds NFSNOOPEN, mark it to be thrown away 1241 * otherwise, if there is an open, reset no open time 1242 * Hopefully, this will avoid excessive re-creation 1243 * of open owners and subsequent open confirms. 1244 */ 1245 stp = LIST_FIRST(&clp->lc_open); 1246 while (stp != LIST_END(&clp->lc_open)) { 1247 nstp = LIST_NEXT(stp, ls_list); 1248 if (LIST_EMPTY(&stp->ls_open)) { 1249 stp->ls_noopens++; 1250 if (stp->ls_noopens > NFSNOOPEN || 1251 (nfsrv_openpluslock * 2) > 1252 nfsrv_v4statelimit) 1253 nfsrv_stablefirst.nsf_flags |= 1254 NFSNSF_NOOPENS; 1255 } else { 1256 stp->ls_noopens = 0; 1257 } 1258 stp = nstp; 1259 } 1260 } 1261 } 1262 clp = nclp; 1263 } 1264 } 1265 NFSUNLOCKSTATE(); 1266 NFSLOCKV4ROOTMUTEX(); 1267 nfsv4_relref(&nfsv4rootfs_lock); 1268 NFSUNLOCKV4ROOTMUTEX(); 1269 } 1270 1271 /* 1272 * The following set of functions free up the various data structures. 1273 */ 1274 /* 1275 * Clear out all open/lock state related to this nfsclient. 1276 * Caller must hold an exclusive lock on nfsv4rootfs_lock, so that 1277 * there are no other active nfsd threads. 1278 */ 1279 APPLESTATIC void 1280 nfsrv_cleanclient(struct nfsclient *clp, NFSPROC_T *p) 1281 { 1282 struct nfsstate *stp, *nstp; 1283 struct nfsdsession *sep, *nsep; 1284 1285 LIST_FOREACH_SAFE(stp, &clp->lc_open, ls_list, nstp) 1286 nfsrv_freeopenowner(stp, 1, p); 1287 if ((clp->lc_flags & LCL_ADMINREVOKED) == 0) 1288 LIST_FOREACH_SAFE(sep, &clp->lc_session, sess_list, nsep) 1289 (void)nfsrv_freesession(sep, NULL); 1290 } 1291 1292 /* 1293 * Free a client that has been cleaned. It should also already have been 1294 * removed from the lists. 1295 * (Just to be safe w.r.t. newnfs_disconnect(), call this function when 1296 * softclock interrupts are enabled.) 1297 */ 1298 APPLESTATIC void 1299 nfsrv_zapclient(struct nfsclient *clp, NFSPROC_T *p) 1300 { 1301 1302 #ifdef notyet 1303 if ((clp->lc_flags & (LCL_GSS | LCL_CALLBACKSON)) == 1304 (LCL_GSS | LCL_CALLBACKSON) && 1305 (clp->lc_hand.nfsh_flag & NFSG_COMPLETE) && 1306 clp->lc_handlelen > 0) { 1307 clp->lc_hand.nfsh_flag &= ~NFSG_COMPLETE; 1308 clp->lc_hand.nfsh_flag |= NFSG_DESTROYED; 1309 (void) nfsrv_docallback(clp, NFSV4PROC_CBNULL, 1310 NULL, 0, NULL, NULL, NULL, 0, p); 1311 } 1312 #endif 1313 newnfs_disconnect(&clp->lc_req); 1314 free(clp->lc_req.nr_nam, M_SONAME); 1315 NFSFREEMUTEX(&clp->lc_req.nr_mtx); 1316 free(clp->lc_stateid, M_NFSDCLIENT); 1317 free(clp, M_NFSDCLIENT); 1318 NFSLOCKSTATE(); 1319 nfsstatsv1.srvclients--; 1320 nfsrv_openpluslock--; 1321 nfsrv_clients--; 1322 NFSUNLOCKSTATE(); 1323 } 1324 1325 /* 1326 * Free a list of delegation state structures. 1327 * (This function will also free all nfslockfile structures that no 1328 * longer have associated state.) 1329 */ 1330 APPLESTATIC void 1331 nfsrv_freedeleglist(struct nfsstatehead *sthp) 1332 { 1333 struct nfsstate *stp, *nstp; 1334 1335 LIST_FOREACH_SAFE(stp, sthp, ls_list, nstp) { 1336 nfsrv_freedeleg(stp); 1337 } 1338 LIST_INIT(sthp); 1339 } 1340 1341 /* 1342 * Free up a delegation. 1343 */ 1344 static void 1345 nfsrv_freedeleg(struct nfsstate *stp) 1346 { 1347 struct nfslockfile *lfp; 1348 1349 LIST_REMOVE(stp, ls_hash); 1350 LIST_REMOVE(stp, ls_list); 1351 LIST_REMOVE(stp, ls_file); 1352 if ((stp->ls_flags & NFSLCK_DELEGWRITE) != 0) 1353 nfsrv_writedelegcnt--; 1354 lfp = stp->ls_lfp; 1355 if (LIST_EMPTY(&lfp->lf_open) && 1356 LIST_EMPTY(&lfp->lf_lock) && LIST_EMPTY(&lfp->lf_deleg) && 1357 LIST_EMPTY(&lfp->lf_locallock) && LIST_EMPTY(&lfp->lf_rollback) && 1358 lfp->lf_usecount == 0 && 1359 nfsv4_testlock(&lfp->lf_locallock_lck) == 0) 1360 nfsrv_freenfslockfile(lfp); 1361 free(stp, M_NFSDSTATE); 1362 nfsstatsv1.srvdelegates--; 1363 nfsrv_openpluslock--; 1364 nfsrv_delegatecnt--; 1365 } 1366 1367 /* 1368 * This function frees an open owner and all associated opens. 1369 */ 1370 static void 1371 nfsrv_freeopenowner(struct nfsstate *stp, int cansleep, NFSPROC_T *p) 1372 { 1373 struct nfsstate *nstp, *tstp; 1374 1375 LIST_REMOVE(stp, ls_list); 1376 /* 1377 * Now, free all associated opens. 1378 */ 1379 nstp = LIST_FIRST(&stp->ls_open); 1380 while (nstp != LIST_END(&stp->ls_open)) { 1381 tstp = nstp; 1382 nstp = LIST_NEXT(nstp, ls_list); 1383 (void) nfsrv_freeopen(tstp, NULL, cansleep, p); 1384 } 1385 if (stp->ls_op) 1386 nfsrvd_derefcache(stp->ls_op); 1387 free(stp, M_NFSDSTATE); 1388 nfsstatsv1.srvopenowners--; 1389 nfsrv_openpluslock--; 1390 } 1391 1392 /* 1393 * This function frees an open (nfsstate open structure) with all associated 1394 * lock_owners and locks. It also frees the nfslockfile structure iff there 1395 * are no other opens on the file. 1396 * Returns 1 if it free'd the nfslockfile, 0 otherwise. 1397 */ 1398 static int 1399 nfsrv_freeopen(struct nfsstate *stp, vnode_t vp, int cansleep, NFSPROC_T *p) 1400 { 1401 struct nfsstate *nstp, *tstp; 1402 struct nfslockfile *lfp; 1403 int ret; 1404 1405 LIST_REMOVE(stp, ls_hash); 1406 LIST_REMOVE(stp, ls_list); 1407 LIST_REMOVE(stp, ls_file); 1408 1409 lfp = stp->ls_lfp; 1410 /* 1411 * Now, free all lockowners associated with this open. 1412 */ 1413 LIST_FOREACH_SAFE(tstp, &stp->ls_open, ls_list, nstp) 1414 nfsrv_freelockowner(tstp, vp, cansleep, p); 1415 1416 /* 1417 * The nfslockfile is freed here if there are no locks 1418 * associated with the open. 1419 * If there are locks associated with the open, the 1420 * nfslockfile structure can be freed via nfsrv_freelockowner(). 1421 * Acquire the state mutex to avoid races with calls to 1422 * nfsrv_getlockfile(). 1423 */ 1424 if (cansleep != 0) 1425 NFSLOCKSTATE(); 1426 if (lfp != NULL && LIST_EMPTY(&lfp->lf_open) && 1427 LIST_EMPTY(&lfp->lf_deleg) && LIST_EMPTY(&lfp->lf_lock) && 1428 LIST_EMPTY(&lfp->lf_locallock) && LIST_EMPTY(&lfp->lf_rollback) && 1429 lfp->lf_usecount == 0 && 1430 (cansleep != 0 || nfsv4_testlock(&lfp->lf_locallock_lck) == 0)) { 1431 nfsrv_freenfslockfile(lfp); 1432 ret = 1; 1433 } else 1434 ret = 0; 1435 if (cansleep != 0) 1436 NFSUNLOCKSTATE(); 1437 free(stp, M_NFSDSTATE); 1438 nfsstatsv1.srvopens--; 1439 nfsrv_openpluslock--; 1440 return (ret); 1441 } 1442 1443 /* 1444 * Frees a lockowner and all associated locks. 1445 */ 1446 static void 1447 nfsrv_freelockowner(struct nfsstate *stp, vnode_t vp, int cansleep, 1448 NFSPROC_T *p) 1449 { 1450 1451 LIST_REMOVE(stp, ls_hash); 1452 LIST_REMOVE(stp, ls_list); 1453 nfsrv_freeallnfslocks(stp, vp, cansleep, p); 1454 if (stp->ls_op) 1455 nfsrvd_derefcache(stp->ls_op); 1456 free(stp, M_NFSDSTATE); 1457 nfsstatsv1.srvlockowners--; 1458 nfsrv_openpluslock--; 1459 } 1460 1461 /* 1462 * Free all the nfs locks on a lockowner. 1463 */ 1464 static void 1465 nfsrv_freeallnfslocks(struct nfsstate *stp, vnode_t vp, int cansleep, 1466 NFSPROC_T *p) 1467 { 1468 struct nfslock *lop, *nlop; 1469 struct nfsrollback *rlp, *nrlp; 1470 struct nfslockfile *lfp = NULL; 1471 int gottvp = 0; 1472 vnode_t tvp = NULL; 1473 uint64_t first, end; 1474 1475 if (vp != NULL) 1476 ASSERT_VOP_UNLOCKED(vp, "nfsrv_freeallnfslocks: vnode locked"); 1477 lop = LIST_FIRST(&stp->ls_lock); 1478 while (lop != LIST_END(&stp->ls_lock)) { 1479 nlop = LIST_NEXT(lop, lo_lckowner); 1480 /* 1481 * Since all locks should be for the same file, lfp should 1482 * not change. 1483 */ 1484 if (lfp == NULL) 1485 lfp = lop->lo_lfp; 1486 else if (lfp != lop->lo_lfp) 1487 panic("allnfslocks"); 1488 /* 1489 * If vp is NULL and cansleep != 0, a vnode must be acquired 1490 * from the file handle. This only occurs when called from 1491 * nfsrv_cleanclient(). 1492 */ 1493 if (gottvp == 0) { 1494 if (nfsrv_dolocallocks == 0) 1495 tvp = NULL; 1496 else if (vp == NULL && cansleep != 0) { 1497 tvp = nfsvno_getvp(&lfp->lf_fh); 1498 NFSVOPUNLOCK(tvp, 0); 1499 } else 1500 tvp = vp; 1501 gottvp = 1; 1502 } 1503 1504 if (tvp != NULL) { 1505 if (cansleep == 0) 1506 panic("allnfs2"); 1507 first = lop->lo_first; 1508 end = lop->lo_end; 1509 nfsrv_freenfslock(lop); 1510 nfsrv_localunlock(tvp, lfp, first, end, p); 1511 LIST_FOREACH_SAFE(rlp, &lfp->lf_rollback, rlck_list, 1512 nrlp) 1513 free(rlp, M_NFSDROLLBACK); 1514 LIST_INIT(&lfp->lf_rollback); 1515 } else 1516 nfsrv_freenfslock(lop); 1517 lop = nlop; 1518 } 1519 if (vp == NULL && tvp != NULL) 1520 vrele(tvp); 1521 } 1522 1523 /* 1524 * Free an nfslock structure. 1525 */ 1526 static void 1527 nfsrv_freenfslock(struct nfslock *lop) 1528 { 1529 1530 if (lop->lo_lckfile.le_prev != NULL) { 1531 LIST_REMOVE(lop, lo_lckfile); 1532 nfsstatsv1.srvlocks--; 1533 nfsrv_openpluslock--; 1534 } 1535 LIST_REMOVE(lop, lo_lckowner); 1536 free(lop, M_NFSDLOCK); 1537 } 1538 1539 /* 1540 * This function frees an nfslockfile structure. 1541 */ 1542 static void 1543 nfsrv_freenfslockfile(struct nfslockfile *lfp) 1544 { 1545 1546 LIST_REMOVE(lfp, lf_hash); 1547 free(lfp, M_NFSDLOCKFILE); 1548 } 1549 1550 /* 1551 * This function looks up an nfsstate structure via stateid. 1552 */ 1553 static int 1554 nfsrv_getstate(struct nfsclient *clp, nfsv4stateid_t *stateidp, __unused u_int32_t flags, 1555 struct nfsstate **stpp) 1556 { 1557 struct nfsstate *stp; 1558 struct nfsstatehead *hp; 1559 int error = 0; 1560 1561 *stpp = NULL; 1562 hp = NFSSTATEHASH(clp, *stateidp); 1563 LIST_FOREACH(stp, hp, ls_hash) { 1564 if (!NFSBCMP(stp->ls_stateid.other, stateidp->other, 1565 NFSX_STATEIDOTHER)) 1566 break; 1567 } 1568 1569 /* 1570 * If no state id in list, return NFSERR_BADSTATEID. 1571 */ 1572 if (stp == LIST_END(hp)) { 1573 error = NFSERR_BADSTATEID; 1574 goto out; 1575 } 1576 *stpp = stp; 1577 1578 out: 1579 NFSEXITCODE(error); 1580 return (error); 1581 } 1582 1583 /* 1584 * This function gets an nfsstate structure via owner string. 1585 */ 1586 static void 1587 nfsrv_getowner(struct nfsstatehead *hp, struct nfsstate *new_stp, 1588 struct nfsstate **stpp) 1589 { 1590 struct nfsstate *stp; 1591 1592 *stpp = NULL; 1593 LIST_FOREACH(stp, hp, ls_list) { 1594 if (new_stp->ls_ownerlen == stp->ls_ownerlen && 1595 !NFSBCMP(new_stp->ls_owner,stp->ls_owner,stp->ls_ownerlen)) { 1596 *stpp = stp; 1597 return; 1598 } 1599 } 1600 } 1601 1602 /* 1603 * Lock control function called to update lock status. 1604 * Returns 0 upon success, -1 if there is no lock and the flags indicate 1605 * that one isn't to be created and an NFSERR_xxx for other errors. 1606 * The structures new_stp and new_lop are passed in as pointers that should 1607 * be set to NULL if the structure is used and shouldn't be free'd. 1608 * For the NFSLCK_TEST and NFSLCK_CHECK cases, the structures are 1609 * never used and can safely be allocated on the stack. For all other 1610 * cases, *new_stpp and *new_lopp should be malloc'd before the call, 1611 * in case they are used. 1612 */ 1613 APPLESTATIC int 1614 nfsrv_lockctrl(vnode_t vp, struct nfsstate **new_stpp, 1615 struct nfslock **new_lopp, struct nfslockconflict *cfp, 1616 nfsquad_t clientid, nfsv4stateid_t *stateidp, 1617 __unused struct nfsexstuff *exp, 1618 struct nfsrv_descript *nd, NFSPROC_T *p) 1619 { 1620 struct nfslock *lop; 1621 struct nfsstate *new_stp = *new_stpp; 1622 struct nfslock *new_lop = *new_lopp; 1623 struct nfsstate *tstp, *mystp, *nstp; 1624 int specialid = 0; 1625 struct nfslockfile *lfp; 1626 struct nfslock *other_lop = NULL; 1627 struct nfsstate *stp, *lckstp = NULL; 1628 struct nfsclient *clp = NULL; 1629 u_int32_t bits; 1630 int error = 0, haslock = 0, ret, reterr; 1631 int getlckret, delegation = 0, filestruct_locked, vnode_unlocked = 0; 1632 fhandle_t nfh; 1633 uint64_t first, end; 1634 uint32_t lock_flags; 1635 1636 if (new_stp->ls_flags & (NFSLCK_CHECK | NFSLCK_SETATTR)) { 1637 /* 1638 * Note the special cases of "all 1s" or "all 0s" stateids and 1639 * let reads with all 1s go ahead. 1640 */ 1641 if (new_stp->ls_stateid.seqid == 0x0 && 1642 new_stp->ls_stateid.other[0] == 0x0 && 1643 new_stp->ls_stateid.other[1] == 0x0 && 1644 new_stp->ls_stateid.other[2] == 0x0) 1645 specialid = 1; 1646 else if (new_stp->ls_stateid.seqid == 0xffffffff && 1647 new_stp->ls_stateid.other[0] == 0xffffffff && 1648 new_stp->ls_stateid.other[1] == 0xffffffff && 1649 new_stp->ls_stateid.other[2] == 0xffffffff) 1650 specialid = 2; 1651 } 1652 1653 /* 1654 * Check for restart conditions (client and server). 1655 */ 1656 error = nfsrv_checkrestart(clientid, new_stp->ls_flags, 1657 &new_stp->ls_stateid, specialid); 1658 if (error) 1659 goto out; 1660 1661 /* 1662 * Check for state resource limit exceeded. 1663 */ 1664 if ((new_stp->ls_flags & NFSLCK_LOCK) && 1665 nfsrv_openpluslock > nfsrv_v4statelimit) { 1666 error = NFSERR_RESOURCE; 1667 goto out; 1668 } 1669 1670 /* 1671 * For the lock case, get another nfslock structure, 1672 * just in case we need it. 1673 * Malloc now, before we start sifting through the linked lists, 1674 * in case we have to wait for memory. 1675 */ 1676 tryagain: 1677 if (new_stp->ls_flags & NFSLCK_LOCK) 1678 other_lop = malloc(sizeof (struct nfslock), 1679 M_NFSDLOCK, M_WAITOK); 1680 filestruct_locked = 0; 1681 reterr = 0; 1682 lfp = NULL; 1683 1684 /* 1685 * Get the lockfile structure for CFH now, so we can do a sanity 1686 * check against the stateid, before incrementing the seqid#, since 1687 * we want to return NFSERR_BADSTATEID on failure and the seqid# 1688 * shouldn't be incremented for this case. 1689 * If nfsrv_getlockfile() returns -1, it means "not found", which 1690 * will be handled later. 1691 * If we are doing Lock/LockU and local locking is enabled, sleep 1692 * lock the nfslockfile structure. 1693 */ 1694 getlckret = nfsrv_getlockfh(vp, new_stp->ls_flags, NULL, &nfh, p); 1695 NFSLOCKSTATE(); 1696 if (getlckret == 0) { 1697 if ((new_stp->ls_flags & (NFSLCK_LOCK | NFSLCK_UNLOCK)) != 0 && 1698 nfsrv_dolocallocks != 0 && nd->nd_repstat == 0) { 1699 getlckret = nfsrv_getlockfile(new_stp->ls_flags, NULL, 1700 &lfp, &nfh, 1); 1701 if (getlckret == 0) 1702 filestruct_locked = 1; 1703 } else 1704 getlckret = nfsrv_getlockfile(new_stp->ls_flags, NULL, 1705 &lfp, &nfh, 0); 1706 } 1707 if (getlckret != 0 && getlckret != -1) 1708 reterr = getlckret; 1709 1710 if (filestruct_locked != 0) { 1711 LIST_INIT(&lfp->lf_rollback); 1712 if ((new_stp->ls_flags & NFSLCK_LOCK)) { 1713 /* 1714 * For local locking, do the advisory locking now, so 1715 * that any conflict can be detected. A failure later 1716 * can be rolled back locally. If an error is returned, 1717 * struct nfslockfile has been unlocked and any local 1718 * locking rolled back. 1719 */ 1720 NFSUNLOCKSTATE(); 1721 if (vnode_unlocked == 0) { 1722 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl1"); 1723 vnode_unlocked = 1; 1724 NFSVOPUNLOCK(vp, 0); 1725 } 1726 reterr = nfsrv_locallock(vp, lfp, 1727 (new_lop->lo_flags & (NFSLCK_READ | NFSLCK_WRITE)), 1728 new_lop->lo_first, new_lop->lo_end, cfp, p); 1729 NFSLOCKSTATE(); 1730 } 1731 } 1732 1733 if (specialid == 0) { 1734 if (new_stp->ls_flags & NFSLCK_TEST) { 1735 /* 1736 * RFC 3530 does not list LockT as an op that renews a 1737 * lease, but the consensus seems to be that it is ok 1738 * for a server to do so. 1739 */ 1740 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 1741 (nfsquad_t)((u_quad_t)0), 0, nd, p); 1742 1743 /* 1744 * Since NFSERR_EXPIRED, NFSERR_ADMINREVOKED are not valid 1745 * error returns for LockT, just go ahead and test for a lock, 1746 * since there are no locks for this client, but other locks 1747 * can conflict. (ie. same client will always be false) 1748 */ 1749 if (error == NFSERR_EXPIRED || error == NFSERR_ADMINREVOKED) 1750 error = 0; 1751 lckstp = new_stp; 1752 } else { 1753 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 1754 (nfsquad_t)((u_quad_t)0), 0, nd, p); 1755 if (error == 0) 1756 /* 1757 * Look up the stateid 1758 */ 1759 error = nfsrv_getstate(clp, &new_stp->ls_stateid, 1760 new_stp->ls_flags, &stp); 1761 /* 1762 * do some sanity checks for an unconfirmed open or a 1763 * stateid that refers to the wrong file, for an open stateid 1764 */ 1765 if (error == 0 && (stp->ls_flags & NFSLCK_OPEN) && 1766 ((stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM) || 1767 (getlckret == 0 && stp->ls_lfp != lfp))){ 1768 /* 1769 * NFSLCK_SETATTR should return OK rather than NFSERR_BADSTATEID 1770 * The only exception is using SETATTR with SIZE. 1771 * */ 1772 if ((new_stp->ls_flags & 1773 (NFSLCK_SETATTR | NFSLCK_CHECK)) != NFSLCK_SETATTR) 1774 error = NFSERR_BADSTATEID; 1775 } 1776 1777 if (error == 0 && 1778 (stp->ls_flags & (NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) && 1779 getlckret == 0 && stp->ls_lfp != lfp) 1780 error = NFSERR_BADSTATEID; 1781 1782 /* 1783 * If the lockowner stateid doesn't refer to the same file, 1784 * I believe that is considered ok, since some clients will 1785 * only create a single lockowner and use that for all locks 1786 * on all files. 1787 * For now, log it as a diagnostic, instead of considering it 1788 * a BadStateid. 1789 */ 1790 if (error == 0 && (stp->ls_flags & 1791 (NFSLCK_OPEN | NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) == 0 && 1792 getlckret == 0 && stp->ls_lfp != lfp) { 1793 #ifdef DIAGNOSTIC 1794 printf("Got a lock statid for different file open\n"); 1795 #endif 1796 /* 1797 error = NFSERR_BADSTATEID; 1798 */ 1799 } 1800 1801 if (error == 0) { 1802 if (new_stp->ls_flags & NFSLCK_OPENTOLOCK) { 1803 /* 1804 * If haslock set, we've already checked the seqid. 1805 */ 1806 if (!haslock) { 1807 if (stp->ls_flags & NFSLCK_OPEN) 1808 error = nfsrv_checkseqid(nd, new_stp->ls_seq, 1809 stp->ls_openowner, new_stp->ls_op); 1810 else 1811 error = NFSERR_BADSTATEID; 1812 } 1813 if (!error) 1814 nfsrv_getowner(&stp->ls_open, new_stp, &lckstp); 1815 if (lckstp) 1816 /* 1817 * I believe this should be an error, but it 1818 * isn't obvious what NFSERR_xxx would be 1819 * appropriate, so I'll use NFSERR_INVAL for now. 1820 */ 1821 error = NFSERR_INVAL; 1822 else 1823 lckstp = new_stp; 1824 } else if (new_stp->ls_flags&(NFSLCK_LOCK|NFSLCK_UNLOCK)) { 1825 /* 1826 * If haslock set, ditto above. 1827 */ 1828 if (!haslock) { 1829 if (stp->ls_flags & NFSLCK_OPEN) 1830 error = NFSERR_BADSTATEID; 1831 else 1832 error = nfsrv_checkseqid(nd, new_stp->ls_seq, 1833 stp, new_stp->ls_op); 1834 } 1835 lckstp = stp; 1836 } else { 1837 lckstp = stp; 1838 } 1839 } 1840 /* 1841 * If the seqid part of the stateid isn't the same, return 1842 * NFSERR_OLDSTATEID for cases other than I/O Ops. 1843 * For I/O Ops, only return NFSERR_OLDSTATEID if 1844 * nfsrv_returnoldstateid is set. (The consensus on the email 1845 * list was that most clients would prefer to not receive 1846 * NFSERR_OLDSTATEID for I/O Ops, but the RFC suggests that that 1847 * is what will happen, so I use the nfsrv_returnoldstateid to 1848 * allow for either server configuration.) 1849 */ 1850 if (!error && stp->ls_stateid.seqid!=new_stp->ls_stateid.seqid && 1851 (((nd->nd_flag & ND_NFSV41) == 0 && 1852 (!(new_stp->ls_flags & NFSLCK_CHECK) || 1853 nfsrv_returnoldstateid)) || 1854 ((nd->nd_flag & ND_NFSV41) != 0 && 1855 new_stp->ls_stateid.seqid != 0))) 1856 error = NFSERR_OLDSTATEID; 1857 } 1858 } 1859 1860 /* 1861 * Now we can check for grace. 1862 */ 1863 if (!error) 1864 error = nfsrv_checkgrace(nd, clp, new_stp->ls_flags); 1865 if ((new_stp->ls_flags & NFSLCK_RECLAIM) && !error && 1866 nfsrv_checkstable(clp)) 1867 error = NFSERR_NOGRACE; 1868 /* 1869 * If we successfully Reclaimed state, note that. 1870 */ 1871 if ((new_stp->ls_flags & NFSLCK_RECLAIM) && !error) 1872 nfsrv_markstable(clp); 1873 1874 /* 1875 * At this point, either error == NFSERR_BADSTATEID or the 1876 * seqid# has been updated, so we can return any error. 1877 * If error == 0, there may be an error in: 1878 * nd_repstat - Set by the calling function. 1879 * reterr - Set above, if getting the nfslockfile structure 1880 * or acquiring the local lock failed. 1881 * (If both of these are set, nd_repstat should probably be 1882 * returned, since that error was detected before this 1883 * function call.) 1884 */ 1885 if (error != 0 || nd->nd_repstat != 0 || reterr != 0) { 1886 if (error == 0) { 1887 if (nd->nd_repstat != 0) 1888 error = nd->nd_repstat; 1889 else 1890 error = reterr; 1891 } 1892 if (filestruct_locked != 0) { 1893 /* Roll back local locks. */ 1894 NFSUNLOCKSTATE(); 1895 if (vnode_unlocked == 0) { 1896 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl2"); 1897 vnode_unlocked = 1; 1898 NFSVOPUNLOCK(vp, 0); 1899 } 1900 nfsrv_locallock_rollback(vp, lfp, p); 1901 NFSLOCKSTATE(); 1902 nfsrv_unlocklf(lfp); 1903 } 1904 NFSUNLOCKSTATE(); 1905 goto out; 1906 } 1907 1908 /* 1909 * Check the nfsrv_getlockfile return. 1910 * Returned -1 if no structure found. 1911 */ 1912 if (getlckret == -1) { 1913 error = NFSERR_EXPIRED; 1914 /* 1915 * Called from lockt, so no lock is OK. 1916 */ 1917 if (new_stp->ls_flags & NFSLCK_TEST) { 1918 error = 0; 1919 } else if (new_stp->ls_flags & 1920 (NFSLCK_CHECK | NFSLCK_SETATTR)) { 1921 /* 1922 * Called to check for a lock, OK if the stateid is all 1923 * 1s or all 0s, but there should be an nfsstate 1924 * otherwise. 1925 * (ie. If there is no open, I'll assume no share 1926 * deny bits.) 1927 */ 1928 if (specialid) 1929 error = 0; 1930 else 1931 error = NFSERR_BADSTATEID; 1932 } 1933 NFSUNLOCKSTATE(); 1934 goto out; 1935 } 1936 1937 /* 1938 * For NFSLCK_CHECK and NFSLCK_LOCK, test for a share conflict. 1939 * For NFSLCK_CHECK, allow a read if write access is granted, 1940 * but check for a deny. For NFSLCK_LOCK, require correct access, 1941 * which implies a conflicting deny can't exist. 1942 */ 1943 if (new_stp->ls_flags & (NFSLCK_CHECK | NFSLCK_LOCK)) { 1944 /* 1945 * Four kinds of state id: 1946 * - specialid (all 0s or all 1s), only for NFSLCK_CHECK 1947 * - stateid for an open 1948 * - stateid for a delegation 1949 * - stateid for a lock owner 1950 */ 1951 if (!specialid) { 1952 if (stp->ls_flags & (NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) { 1953 delegation = 1; 1954 mystp = stp; 1955 nfsrv_delaydelegtimeout(stp); 1956 } else if (stp->ls_flags & NFSLCK_OPEN) { 1957 mystp = stp; 1958 } else { 1959 mystp = stp->ls_openstp; 1960 } 1961 /* 1962 * If locking or checking, require correct access 1963 * bit set. 1964 */ 1965 if (((new_stp->ls_flags & NFSLCK_LOCK) && 1966 !((new_lop->lo_flags >> NFSLCK_LOCKSHIFT) & 1967 mystp->ls_flags & NFSLCK_ACCESSBITS)) || 1968 ((new_stp->ls_flags & (NFSLCK_CHECK|NFSLCK_READACCESS)) == 1969 (NFSLCK_CHECK | NFSLCK_READACCESS) && 1970 !(mystp->ls_flags & NFSLCK_READACCESS) && 1971 nfsrv_allowreadforwriteopen == 0) || 1972 ((new_stp->ls_flags & (NFSLCK_CHECK|NFSLCK_WRITEACCESS)) == 1973 (NFSLCK_CHECK | NFSLCK_WRITEACCESS) && 1974 !(mystp->ls_flags & NFSLCK_WRITEACCESS))) { 1975 if (filestruct_locked != 0) { 1976 /* Roll back local locks. */ 1977 NFSUNLOCKSTATE(); 1978 if (vnode_unlocked == 0) { 1979 ASSERT_VOP_ELOCKED(vp, 1980 "nfsrv_lockctrl3"); 1981 vnode_unlocked = 1; 1982 NFSVOPUNLOCK(vp, 0); 1983 } 1984 nfsrv_locallock_rollback(vp, lfp, p); 1985 NFSLOCKSTATE(); 1986 nfsrv_unlocklf(lfp); 1987 } 1988 NFSUNLOCKSTATE(); 1989 error = NFSERR_OPENMODE; 1990 goto out; 1991 } 1992 } else 1993 mystp = NULL; 1994 if ((new_stp->ls_flags & NFSLCK_CHECK) && !delegation) { 1995 /* 1996 * Check for a conflicting deny bit. 1997 */ 1998 LIST_FOREACH(tstp, &lfp->lf_open, ls_file) { 1999 if (tstp != mystp) { 2000 bits = tstp->ls_flags; 2001 bits >>= NFSLCK_SHIFT; 2002 if (new_stp->ls_flags & bits & NFSLCK_ACCESSBITS) { 2003 KASSERT(vnode_unlocked == 0, 2004 ("nfsrv_lockctrl: vnode unlocked1")); 2005 ret = nfsrv_clientconflict(tstp->ls_clp, &haslock, 2006 vp, p); 2007 if (ret == 1) { 2008 /* 2009 * nfsrv_clientconflict unlocks state 2010 * when it returns non-zero. 2011 */ 2012 lckstp = NULL; 2013 goto tryagain; 2014 } 2015 if (ret == 0) 2016 NFSUNLOCKSTATE(); 2017 if (ret == 2) 2018 error = NFSERR_PERM; 2019 else 2020 error = NFSERR_OPENMODE; 2021 goto out; 2022 } 2023 } 2024 } 2025 2026 /* We're outta here */ 2027 NFSUNLOCKSTATE(); 2028 goto out; 2029 } 2030 } 2031 2032 /* 2033 * For setattr, just get rid of all the Delegations for other clients. 2034 */ 2035 if (new_stp->ls_flags & NFSLCK_SETATTR) { 2036 KASSERT(vnode_unlocked == 0, 2037 ("nfsrv_lockctrl: vnode unlocked2")); 2038 ret = nfsrv_cleandeleg(vp, lfp, clp, &haslock, p); 2039 if (ret) { 2040 /* 2041 * nfsrv_cleandeleg() unlocks state when it 2042 * returns non-zero. 2043 */ 2044 if (ret == -1) { 2045 lckstp = NULL; 2046 goto tryagain; 2047 } 2048 error = ret; 2049 goto out; 2050 } 2051 if (!(new_stp->ls_flags & NFSLCK_CHECK) || 2052 (LIST_EMPTY(&lfp->lf_open) && LIST_EMPTY(&lfp->lf_lock) && 2053 LIST_EMPTY(&lfp->lf_deleg))) { 2054 NFSUNLOCKSTATE(); 2055 goto out; 2056 } 2057 } 2058 2059 /* 2060 * Check for a conflicting delegation. If one is found, call 2061 * nfsrv_delegconflict() to handle it. If the v4root lock hasn't 2062 * been set yet, it will get the lock. Otherwise, it will recall 2063 * the delegation. Then, we try try again... 2064 * I currently believe the conflict algorithm to be: 2065 * For Lock Ops (Lock/LockT/LockU) 2066 * - there is a conflict iff a different client has a write delegation 2067 * For Reading (Read Op) 2068 * - there is a conflict iff a different client has a write delegation 2069 * (the specialids are always a different client) 2070 * For Writing (Write/Setattr of size) 2071 * - there is a conflict if a different client has any delegation 2072 * - there is a conflict if the same client has a read delegation 2073 * (I don't understand why this isn't allowed, but that seems to be 2074 * the current consensus?) 2075 */ 2076 tstp = LIST_FIRST(&lfp->lf_deleg); 2077 while (tstp != LIST_END(&lfp->lf_deleg)) { 2078 nstp = LIST_NEXT(tstp, ls_file); 2079 if ((((new_stp->ls_flags&(NFSLCK_LOCK|NFSLCK_UNLOCK|NFSLCK_TEST))|| 2080 ((new_stp->ls_flags & NFSLCK_CHECK) && 2081 (new_lop->lo_flags & NFSLCK_READ))) && 2082 clp != tstp->ls_clp && 2083 (tstp->ls_flags & NFSLCK_DELEGWRITE)) || 2084 ((new_stp->ls_flags & NFSLCK_CHECK) && 2085 (new_lop->lo_flags & NFSLCK_WRITE) && 2086 (clp != tstp->ls_clp || 2087 (tstp->ls_flags & NFSLCK_DELEGREAD)))) { 2088 ret = 0; 2089 if (filestruct_locked != 0) { 2090 /* Roll back local locks. */ 2091 NFSUNLOCKSTATE(); 2092 if (vnode_unlocked == 0) { 2093 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl4"); 2094 NFSVOPUNLOCK(vp, 0); 2095 } 2096 nfsrv_locallock_rollback(vp, lfp, p); 2097 NFSLOCKSTATE(); 2098 nfsrv_unlocklf(lfp); 2099 NFSUNLOCKSTATE(); 2100 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 2101 vnode_unlocked = 0; 2102 if ((vp->v_iflag & VI_DOOMED) != 0) 2103 ret = NFSERR_SERVERFAULT; 2104 NFSLOCKSTATE(); 2105 } 2106 if (ret == 0) 2107 ret = nfsrv_delegconflict(tstp, &haslock, p, vp); 2108 if (ret) { 2109 /* 2110 * nfsrv_delegconflict unlocks state when it 2111 * returns non-zero, which it always does. 2112 */ 2113 if (other_lop) { 2114 free(other_lop, M_NFSDLOCK); 2115 other_lop = NULL; 2116 } 2117 if (ret == -1) { 2118 lckstp = NULL; 2119 goto tryagain; 2120 } 2121 error = ret; 2122 goto out; 2123 } 2124 /* Never gets here. */ 2125 } 2126 tstp = nstp; 2127 } 2128 2129 /* 2130 * Handle the unlock case by calling nfsrv_updatelock(). 2131 * (Should I have done some access checking above for unlock? For now, 2132 * just let it happen.) 2133 */ 2134 if (new_stp->ls_flags & NFSLCK_UNLOCK) { 2135 first = new_lop->lo_first; 2136 end = new_lop->lo_end; 2137 nfsrv_updatelock(stp, new_lopp, &other_lop, lfp); 2138 stateidp->seqid = ++(stp->ls_stateid.seqid); 2139 if ((nd->nd_flag & ND_NFSV41) != 0 && stateidp->seqid == 0) 2140 stateidp->seqid = stp->ls_stateid.seqid = 1; 2141 stateidp->other[0] = stp->ls_stateid.other[0]; 2142 stateidp->other[1] = stp->ls_stateid.other[1]; 2143 stateidp->other[2] = stp->ls_stateid.other[2]; 2144 if (filestruct_locked != 0) { 2145 NFSUNLOCKSTATE(); 2146 if (vnode_unlocked == 0) { 2147 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl5"); 2148 vnode_unlocked = 1; 2149 NFSVOPUNLOCK(vp, 0); 2150 } 2151 /* Update the local locks. */ 2152 nfsrv_localunlock(vp, lfp, first, end, p); 2153 NFSLOCKSTATE(); 2154 nfsrv_unlocklf(lfp); 2155 } 2156 NFSUNLOCKSTATE(); 2157 goto out; 2158 } 2159 2160 /* 2161 * Search for a conflicting lock. A lock conflicts if: 2162 * - the lock range overlaps and 2163 * - at least one lock is a write lock and 2164 * - it is not owned by the same lock owner 2165 */ 2166 if (!delegation) { 2167 LIST_FOREACH(lop, &lfp->lf_lock, lo_lckfile) { 2168 if (new_lop->lo_end > lop->lo_first && 2169 new_lop->lo_first < lop->lo_end && 2170 (new_lop->lo_flags == NFSLCK_WRITE || 2171 lop->lo_flags == NFSLCK_WRITE) && 2172 lckstp != lop->lo_stp && 2173 (clp != lop->lo_stp->ls_clp || 2174 lckstp->ls_ownerlen != lop->lo_stp->ls_ownerlen || 2175 NFSBCMP(lckstp->ls_owner, lop->lo_stp->ls_owner, 2176 lckstp->ls_ownerlen))) { 2177 if (other_lop) { 2178 free(other_lop, M_NFSDLOCK); 2179 other_lop = NULL; 2180 } 2181 if (vnode_unlocked != 0) 2182 ret = nfsrv_clientconflict(lop->lo_stp->ls_clp, &haslock, 2183 NULL, p); 2184 else 2185 ret = nfsrv_clientconflict(lop->lo_stp->ls_clp, &haslock, 2186 vp, p); 2187 if (ret == 1) { 2188 if (filestruct_locked != 0) { 2189 if (vnode_unlocked == 0) { 2190 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl6"); 2191 NFSVOPUNLOCK(vp, 0); 2192 } 2193 /* Roll back local locks. */ 2194 nfsrv_locallock_rollback(vp, lfp, p); 2195 NFSLOCKSTATE(); 2196 nfsrv_unlocklf(lfp); 2197 NFSUNLOCKSTATE(); 2198 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 2199 vnode_unlocked = 0; 2200 if ((vp->v_iflag & VI_DOOMED) != 0) { 2201 error = NFSERR_SERVERFAULT; 2202 goto out; 2203 } 2204 } 2205 /* 2206 * nfsrv_clientconflict() unlocks state when it 2207 * returns non-zero. 2208 */ 2209 lckstp = NULL; 2210 goto tryagain; 2211 } 2212 /* 2213 * Found a conflicting lock, so record the conflict and 2214 * return the error. 2215 */ 2216 if (cfp != NULL && ret == 0) { 2217 cfp->cl_clientid.lval[0]=lop->lo_stp->ls_stateid.other[0]; 2218 cfp->cl_clientid.lval[1]=lop->lo_stp->ls_stateid.other[1]; 2219 cfp->cl_first = lop->lo_first; 2220 cfp->cl_end = lop->lo_end; 2221 cfp->cl_flags = lop->lo_flags; 2222 cfp->cl_ownerlen = lop->lo_stp->ls_ownerlen; 2223 NFSBCOPY(lop->lo_stp->ls_owner, cfp->cl_owner, 2224 cfp->cl_ownerlen); 2225 } 2226 if (ret == 2) 2227 error = NFSERR_PERM; 2228 else if (new_stp->ls_flags & NFSLCK_RECLAIM) 2229 error = NFSERR_RECLAIMCONFLICT; 2230 else if (new_stp->ls_flags & NFSLCK_CHECK) 2231 error = NFSERR_LOCKED; 2232 else 2233 error = NFSERR_DENIED; 2234 if (filestruct_locked != 0 && ret == 0) { 2235 /* Roll back local locks. */ 2236 NFSUNLOCKSTATE(); 2237 if (vnode_unlocked == 0) { 2238 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl7"); 2239 vnode_unlocked = 1; 2240 NFSVOPUNLOCK(vp, 0); 2241 } 2242 nfsrv_locallock_rollback(vp, lfp, p); 2243 NFSLOCKSTATE(); 2244 nfsrv_unlocklf(lfp); 2245 } 2246 if (ret == 0) 2247 NFSUNLOCKSTATE(); 2248 goto out; 2249 } 2250 } 2251 } 2252 2253 /* 2254 * We only get here if there was no lock that conflicted. 2255 */ 2256 if (new_stp->ls_flags & (NFSLCK_TEST | NFSLCK_CHECK)) { 2257 NFSUNLOCKSTATE(); 2258 goto out; 2259 } 2260 2261 /* 2262 * We only get here when we are creating or modifying a lock. 2263 * There are two variants: 2264 * - exist_lock_owner where lock_owner exists 2265 * - open_to_lock_owner with new lock_owner 2266 */ 2267 first = new_lop->lo_first; 2268 end = new_lop->lo_end; 2269 lock_flags = new_lop->lo_flags; 2270 if (!(new_stp->ls_flags & NFSLCK_OPENTOLOCK)) { 2271 nfsrv_updatelock(lckstp, new_lopp, &other_lop, lfp); 2272 stateidp->seqid = ++(lckstp->ls_stateid.seqid); 2273 if ((nd->nd_flag & ND_NFSV41) != 0 && stateidp->seqid == 0) 2274 stateidp->seqid = lckstp->ls_stateid.seqid = 1; 2275 stateidp->other[0] = lckstp->ls_stateid.other[0]; 2276 stateidp->other[1] = lckstp->ls_stateid.other[1]; 2277 stateidp->other[2] = lckstp->ls_stateid.other[2]; 2278 } else { 2279 /* 2280 * The new open_to_lock_owner case. 2281 * Link the new nfsstate into the lists. 2282 */ 2283 new_stp->ls_seq = new_stp->ls_opentolockseq; 2284 nfsrvd_refcache(new_stp->ls_op); 2285 stateidp->seqid = new_stp->ls_stateid.seqid = 1; 2286 stateidp->other[0] = new_stp->ls_stateid.other[0] = 2287 clp->lc_clientid.lval[0]; 2288 stateidp->other[1] = new_stp->ls_stateid.other[1] = 2289 clp->lc_clientid.lval[1]; 2290 stateidp->other[2] = new_stp->ls_stateid.other[2] = 2291 nfsrv_nextstateindex(clp); 2292 new_stp->ls_clp = clp; 2293 LIST_INIT(&new_stp->ls_lock); 2294 new_stp->ls_openstp = stp; 2295 new_stp->ls_lfp = lfp; 2296 nfsrv_insertlock(new_lop, (struct nfslock *)new_stp, new_stp, 2297 lfp); 2298 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_stp->ls_stateid), 2299 new_stp, ls_hash); 2300 LIST_INSERT_HEAD(&stp->ls_open, new_stp, ls_list); 2301 *new_lopp = NULL; 2302 *new_stpp = NULL; 2303 nfsstatsv1.srvlockowners++; 2304 nfsrv_openpluslock++; 2305 } 2306 if (filestruct_locked != 0) { 2307 NFSUNLOCKSTATE(); 2308 nfsrv_locallock_commit(lfp, lock_flags, first, end); 2309 NFSLOCKSTATE(); 2310 nfsrv_unlocklf(lfp); 2311 } 2312 NFSUNLOCKSTATE(); 2313 2314 out: 2315 if (haslock) { 2316 NFSLOCKV4ROOTMUTEX(); 2317 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2318 NFSUNLOCKV4ROOTMUTEX(); 2319 } 2320 if (vnode_unlocked != 0) { 2321 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 2322 if (error == 0 && (vp->v_iflag & VI_DOOMED) != 0) 2323 error = NFSERR_SERVERFAULT; 2324 } 2325 if (other_lop) 2326 free(other_lop, M_NFSDLOCK); 2327 NFSEXITCODE2(error, nd); 2328 return (error); 2329 } 2330 2331 /* 2332 * Check for state errors for Open. 2333 * repstat is passed back out as an error if more critical errors 2334 * are not detected. 2335 */ 2336 APPLESTATIC int 2337 nfsrv_opencheck(nfsquad_t clientid, nfsv4stateid_t *stateidp, 2338 struct nfsstate *new_stp, vnode_t vp, struct nfsrv_descript *nd, 2339 NFSPROC_T *p, int repstat) 2340 { 2341 struct nfsstate *stp, *nstp; 2342 struct nfsclient *clp; 2343 struct nfsstate *ownerstp; 2344 struct nfslockfile *lfp, *new_lfp; 2345 int error = 0, haslock = 0, ret, readonly = 0, getfhret = 0; 2346 2347 if ((new_stp->ls_flags & NFSLCK_SHAREBITS) == NFSLCK_READACCESS) 2348 readonly = 1; 2349 /* 2350 * Check for restart conditions (client and server). 2351 */ 2352 error = nfsrv_checkrestart(clientid, new_stp->ls_flags, 2353 &new_stp->ls_stateid, 0); 2354 if (error) 2355 goto out; 2356 2357 /* 2358 * Check for state resource limit exceeded. 2359 * Technically this should be SMP protected, but the worst 2360 * case error is "out by one or two" on the count when it 2361 * returns NFSERR_RESOURCE and the limit is just a rather 2362 * arbitrary high water mark, so no harm is done. 2363 */ 2364 if (nfsrv_openpluslock > nfsrv_v4statelimit) { 2365 error = NFSERR_RESOURCE; 2366 goto out; 2367 } 2368 2369 tryagain: 2370 new_lfp = malloc(sizeof (struct nfslockfile), 2371 M_NFSDLOCKFILE, M_WAITOK); 2372 if (vp) 2373 getfhret = nfsrv_getlockfh(vp, new_stp->ls_flags, new_lfp, 2374 NULL, p); 2375 NFSLOCKSTATE(); 2376 /* 2377 * Get the nfsclient structure. 2378 */ 2379 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 2380 (nfsquad_t)((u_quad_t)0), 0, nd, p); 2381 2382 /* 2383 * Look up the open owner. See if it needs confirmation and 2384 * check the seq#, as required. 2385 */ 2386 if (!error) 2387 nfsrv_getowner(&clp->lc_open, new_stp, &ownerstp); 2388 2389 if (!error && ownerstp) { 2390 error = nfsrv_checkseqid(nd, new_stp->ls_seq, ownerstp, 2391 new_stp->ls_op); 2392 /* 2393 * If the OpenOwner hasn't been confirmed, assume the 2394 * old one was a replay and this one is ok. 2395 * See: RFC3530 Sec. 14.2.18. 2396 */ 2397 if (error == NFSERR_BADSEQID && 2398 (ownerstp->ls_flags & NFSLCK_NEEDSCONFIRM)) 2399 error = 0; 2400 } 2401 2402 /* 2403 * Check for grace. 2404 */ 2405 if (!error) 2406 error = nfsrv_checkgrace(nd, clp, new_stp->ls_flags); 2407 if ((new_stp->ls_flags & NFSLCK_RECLAIM) && !error && 2408 nfsrv_checkstable(clp)) 2409 error = NFSERR_NOGRACE; 2410 2411 /* 2412 * If none of the above errors occurred, let repstat be 2413 * returned. 2414 */ 2415 if (repstat && !error) 2416 error = repstat; 2417 if (error) { 2418 NFSUNLOCKSTATE(); 2419 if (haslock) { 2420 NFSLOCKV4ROOTMUTEX(); 2421 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2422 NFSUNLOCKV4ROOTMUTEX(); 2423 } 2424 free(new_lfp, M_NFSDLOCKFILE); 2425 goto out; 2426 } 2427 2428 /* 2429 * If vp == NULL, the file doesn't exist yet, so return ok. 2430 * (This always happens on the first pass, so haslock must be 0.) 2431 */ 2432 if (vp == NULL) { 2433 NFSUNLOCKSTATE(); 2434 free(new_lfp, M_NFSDLOCKFILE); 2435 goto out; 2436 } 2437 2438 /* 2439 * Get the structure for the underlying file. 2440 */ 2441 if (getfhret) 2442 error = getfhret; 2443 else 2444 error = nfsrv_getlockfile(new_stp->ls_flags, &new_lfp, &lfp, 2445 NULL, 0); 2446 if (new_lfp) 2447 free(new_lfp, M_NFSDLOCKFILE); 2448 if (error) { 2449 NFSUNLOCKSTATE(); 2450 if (haslock) { 2451 NFSLOCKV4ROOTMUTEX(); 2452 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2453 NFSUNLOCKV4ROOTMUTEX(); 2454 } 2455 goto out; 2456 } 2457 2458 /* 2459 * Search for a conflicting open/share. 2460 */ 2461 if (new_stp->ls_flags & NFSLCK_DELEGCUR) { 2462 /* 2463 * For Delegate_Cur, search for the matching Delegation, 2464 * which indicates no conflict. 2465 * An old delegation should have been recovered by the 2466 * client doing a Claim_DELEGATE_Prev, so I won't let 2467 * it match and return NFSERR_EXPIRED. Should I let it 2468 * match? 2469 */ 2470 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) { 2471 if (!(stp->ls_flags & NFSLCK_OLDDELEG) && 2472 (((nd->nd_flag & ND_NFSV41) != 0 && 2473 stateidp->seqid == 0) || 2474 stateidp->seqid == stp->ls_stateid.seqid) && 2475 !NFSBCMP(stateidp->other, stp->ls_stateid.other, 2476 NFSX_STATEIDOTHER)) 2477 break; 2478 } 2479 if (stp == LIST_END(&lfp->lf_deleg) || 2480 ((new_stp->ls_flags & NFSLCK_WRITEACCESS) && 2481 (stp->ls_flags & NFSLCK_DELEGREAD))) { 2482 NFSUNLOCKSTATE(); 2483 if (haslock) { 2484 NFSLOCKV4ROOTMUTEX(); 2485 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2486 NFSUNLOCKV4ROOTMUTEX(); 2487 } 2488 error = NFSERR_EXPIRED; 2489 goto out; 2490 } 2491 } 2492 2493 /* 2494 * Check for access/deny bit conflicts. I check for the same 2495 * owner as well, in case the client didn't bother. 2496 */ 2497 LIST_FOREACH(stp, &lfp->lf_open, ls_file) { 2498 if (!(new_stp->ls_flags & NFSLCK_DELEGCUR) && 2499 (((new_stp->ls_flags & NFSLCK_ACCESSBITS) & 2500 ((stp->ls_flags>>NFSLCK_SHIFT) & NFSLCK_ACCESSBITS))|| 2501 ((stp->ls_flags & NFSLCK_ACCESSBITS) & 2502 ((new_stp->ls_flags>>NFSLCK_SHIFT)&NFSLCK_ACCESSBITS)))){ 2503 ret = nfsrv_clientconflict(stp->ls_clp,&haslock,vp,p); 2504 if (ret == 1) { 2505 /* 2506 * nfsrv_clientconflict() unlocks 2507 * state when it returns non-zero. 2508 */ 2509 goto tryagain; 2510 } 2511 if (ret == 2) 2512 error = NFSERR_PERM; 2513 else if (new_stp->ls_flags & NFSLCK_RECLAIM) 2514 error = NFSERR_RECLAIMCONFLICT; 2515 else 2516 error = NFSERR_SHAREDENIED; 2517 if (ret == 0) 2518 NFSUNLOCKSTATE(); 2519 if (haslock) { 2520 NFSLOCKV4ROOTMUTEX(); 2521 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2522 NFSUNLOCKV4ROOTMUTEX(); 2523 } 2524 goto out; 2525 } 2526 } 2527 2528 /* 2529 * Check for a conflicting delegation. If one is found, call 2530 * nfsrv_delegconflict() to handle it. If the v4root lock hasn't 2531 * been set yet, it will get the lock. Otherwise, it will recall 2532 * the delegation. Then, we try try again... 2533 * (If NFSLCK_DELEGCUR is set, it has a delegation, so there 2534 * isn't a conflict.) 2535 * I currently believe the conflict algorithm to be: 2536 * For Open with Read Access and Deny None 2537 * - there is a conflict iff a different client has a write delegation 2538 * For Open with other Write Access or any Deny except None 2539 * - there is a conflict if a different client has any delegation 2540 * - there is a conflict if the same client has a read delegation 2541 * (The current consensus is that this last case should be 2542 * considered a conflict since the client with a read delegation 2543 * could have done an Open with ReadAccess and WriteDeny 2544 * locally and then not have checked for the WriteDeny.) 2545 * Don't check for a Reclaim, since that will be dealt with 2546 * by nfsrv_openctrl(). 2547 */ 2548 if (!(new_stp->ls_flags & 2549 (NFSLCK_DELEGPREV | NFSLCK_DELEGCUR | NFSLCK_RECLAIM))) { 2550 stp = LIST_FIRST(&lfp->lf_deleg); 2551 while (stp != LIST_END(&lfp->lf_deleg)) { 2552 nstp = LIST_NEXT(stp, ls_file); 2553 if ((readonly && stp->ls_clp != clp && 2554 (stp->ls_flags & NFSLCK_DELEGWRITE)) || 2555 (!readonly && (stp->ls_clp != clp || 2556 (stp->ls_flags & NFSLCK_DELEGREAD)))) { 2557 ret = nfsrv_delegconflict(stp, &haslock, p, vp); 2558 if (ret) { 2559 /* 2560 * nfsrv_delegconflict() unlocks state 2561 * when it returns non-zero. 2562 */ 2563 if (ret == -1) 2564 goto tryagain; 2565 error = ret; 2566 goto out; 2567 } 2568 } 2569 stp = nstp; 2570 } 2571 } 2572 NFSUNLOCKSTATE(); 2573 if (haslock) { 2574 NFSLOCKV4ROOTMUTEX(); 2575 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2576 NFSUNLOCKV4ROOTMUTEX(); 2577 } 2578 2579 out: 2580 NFSEXITCODE2(error, nd); 2581 return (error); 2582 } 2583 2584 /* 2585 * Open control function to create/update open state for an open. 2586 */ 2587 APPLESTATIC int 2588 nfsrv_openctrl(struct nfsrv_descript *nd, vnode_t vp, 2589 struct nfsstate **new_stpp, nfsquad_t clientid, nfsv4stateid_t *stateidp, 2590 nfsv4stateid_t *delegstateidp, u_int32_t *rflagsp, struct nfsexstuff *exp, 2591 NFSPROC_T *p, u_quad_t filerev) 2592 { 2593 struct nfsstate *new_stp = *new_stpp; 2594 struct nfsstate *stp, *nstp; 2595 struct nfsstate *openstp = NULL, *new_open, *ownerstp, *new_deleg; 2596 struct nfslockfile *lfp, *new_lfp; 2597 struct nfsclient *clp; 2598 int error = 0, haslock = 0, ret, delegate = 1, writedeleg = 1; 2599 int readonly = 0, cbret = 1, getfhret = 0; 2600 int gotstate = 0, len = 0; 2601 u_char *clidp = NULL; 2602 2603 if ((new_stp->ls_flags & NFSLCK_SHAREBITS) == NFSLCK_READACCESS) 2604 readonly = 1; 2605 /* 2606 * Check for restart conditions (client and server). 2607 * (Paranoia, should have been detected by nfsrv_opencheck().) 2608 * If an error does show up, return NFSERR_EXPIRED, since the 2609 * the seqid# has already been incremented. 2610 */ 2611 error = nfsrv_checkrestart(clientid, new_stp->ls_flags, 2612 &new_stp->ls_stateid, 0); 2613 if (error) { 2614 printf("Nfsd: openctrl unexpected restart err=%d\n", 2615 error); 2616 error = NFSERR_EXPIRED; 2617 goto out; 2618 } 2619 2620 clidp = malloc(NFSV4_OPAQUELIMIT, M_TEMP, M_WAITOK); 2621 tryagain: 2622 new_lfp = malloc(sizeof (struct nfslockfile), 2623 M_NFSDLOCKFILE, M_WAITOK); 2624 new_open = malloc(sizeof (struct nfsstate), 2625 M_NFSDSTATE, M_WAITOK); 2626 new_deleg = malloc(sizeof (struct nfsstate), 2627 M_NFSDSTATE, M_WAITOK); 2628 getfhret = nfsrv_getlockfh(vp, new_stp->ls_flags, new_lfp, 2629 NULL, p); 2630 NFSLOCKSTATE(); 2631 /* 2632 * Get the client structure. Since the linked lists could be changed 2633 * by other nfsd processes if this process does a tsleep(), one of 2634 * two things must be done. 2635 * 1 - don't tsleep() 2636 * or 2637 * 2 - get the nfsv4_lock() { indicated by haslock == 1 } 2638 * before using the lists, since this lock stops the other 2639 * nfsd. This should only be used for rare cases, since it 2640 * essentially single threads the nfsd. 2641 * At this time, it is only done for cases where the stable 2642 * storage file must be written prior to completion of state 2643 * expiration. 2644 */ 2645 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 2646 (nfsquad_t)((u_quad_t)0), 0, nd, p); 2647 if (!error && (clp->lc_flags & LCL_NEEDSCBNULL) && 2648 clp->lc_program) { 2649 /* 2650 * This happens on the first open for a client 2651 * that supports callbacks. 2652 */ 2653 NFSUNLOCKSTATE(); 2654 /* 2655 * Although nfsrv_docallback() will sleep, clp won't 2656 * go away, since they are only removed when the 2657 * nfsv4_lock() has blocked the nfsd threads. The 2658 * fields in clp can change, but having multiple 2659 * threads do this Null callback RPC should be 2660 * harmless. 2661 */ 2662 cbret = nfsrv_docallback(clp, NFSV4PROC_CBNULL, 2663 NULL, 0, NULL, NULL, NULL, 0, p); 2664 NFSLOCKSTATE(); 2665 clp->lc_flags &= ~LCL_NEEDSCBNULL; 2666 if (!cbret) 2667 clp->lc_flags |= LCL_CALLBACKSON; 2668 } 2669 2670 /* 2671 * Look up the open owner. See if it needs confirmation and 2672 * check the seq#, as required. 2673 */ 2674 if (!error) 2675 nfsrv_getowner(&clp->lc_open, new_stp, &ownerstp); 2676 2677 if (error) { 2678 NFSUNLOCKSTATE(); 2679 printf("Nfsd: openctrl unexpected state err=%d\n", 2680 error); 2681 free(new_lfp, M_NFSDLOCKFILE); 2682 free(new_open, M_NFSDSTATE); 2683 free(new_deleg, M_NFSDSTATE); 2684 if (haslock) { 2685 NFSLOCKV4ROOTMUTEX(); 2686 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2687 NFSUNLOCKV4ROOTMUTEX(); 2688 } 2689 error = NFSERR_EXPIRED; 2690 goto out; 2691 } 2692 2693 if (new_stp->ls_flags & NFSLCK_RECLAIM) 2694 nfsrv_markstable(clp); 2695 2696 /* 2697 * Get the structure for the underlying file. 2698 */ 2699 if (getfhret) 2700 error = getfhret; 2701 else 2702 error = nfsrv_getlockfile(new_stp->ls_flags, &new_lfp, &lfp, 2703 NULL, 0); 2704 if (new_lfp) 2705 free(new_lfp, M_NFSDLOCKFILE); 2706 if (error) { 2707 NFSUNLOCKSTATE(); 2708 printf("Nfsd openctrl unexpected getlockfile err=%d\n", 2709 error); 2710 free(new_open, M_NFSDSTATE); 2711 free(new_deleg, M_NFSDSTATE); 2712 if (haslock) { 2713 NFSLOCKV4ROOTMUTEX(); 2714 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2715 NFSUNLOCKV4ROOTMUTEX(); 2716 } 2717 goto out; 2718 } 2719 2720 /* 2721 * Search for a conflicting open/share. 2722 */ 2723 if (new_stp->ls_flags & NFSLCK_DELEGCUR) { 2724 /* 2725 * For Delegate_Cur, search for the matching Delegation, 2726 * which indicates no conflict. 2727 * An old delegation should have been recovered by the 2728 * client doing a Claim_DELEGATE_Prev, so I won't let 2729 * it match and return NFSERR_EXPIRED. Should I let it 2730 * match? 2731 */ 2732 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) { 2733 if (!(stp->ls_flags & NFSLCK_OLDDELEG) && 2734 (((nd->nd_flag & ND_NFSV41) != 0 && 2735 stateidp->seqid == 0) || 2736 stateidp->seqid == stp->ls_stateid.seqid) && 2737 !NFSBCMP(stateidp->other, stp->ls_stateid.other, 2738 NFSX_STATEIDOTHER)) 2739 break; 2740 } 2741 if (stp == LIST_END(&lfp->lf_deleg) || 2742 ((new_stp->ls_flags & NFSLCK_WRITEACCESS) && 2743 (stp->ls_flags & NFSLCK_DELEGREAD))) { 2744 NFSUNLOCKSTATE(); 2745 printf("Nfsd openctrl unexpected expiry\n"); 2746 free(new_open, M_NFSDSTATE); 2747 free(new_deleg, M_NFSDSTATE); 2748 if (haslock) { 2749 NFSLOCKV4ROOTMUTEX(); 2750 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2751 NFSUNLOCKV4ROOTMUTEX(); 2752 } 2753 error = NFSERR_EXPIRED; 2754 goto out; 2755 } 2756 2757 /* 2758 * Don't issue a Delegation, since one already exists and 2759 * delay delegation timeout, as required. 2760 */ 2761 delegate = 0; 2762 nfsrv_delaydelegtimeout(stp); 2763 } 2764 2765 /* 2766 * Check for access/deny bit conflicts. I also check for the 2767 * same owner, since the client might not have bothered to check. 2768 * Also, note an open for the same file and owner, if found, 2769 * which is all we do here for Delegate_Cur, since conflict 2770 * checking is already done. 2771 */ 2772 LIST_FOREACH(stp, &lfp->lf_open, ls_file) { 2773 if (ownerstp && stp->ls_openowner == ownerstp) 2774 openstp = stp; 2775 if (!(new_stp->ls_flags & NFSLCK_DELEGCUR)) { 2776 /* 2777 * If another client has the file open, the only 2778 * delegation that can be issued is a Read delegation 2779 * and only if it is a Read open with Deny none. 2780 */ 2781 if (clp != stp->ls_clp) { 2782 if ((stp->ls_flags & NFSLCK_SHAREBITS) == 2783 NFSLCK_READACCESS) 2784 writedeleg = 0; 2785 else 2786 delegate = 0; 2787 } 2788 if(((new_stp->ls_flags & NFSLCK_ACCESSBITS) & 2789 ((stp->ls_flags>>NFSLCK_SHIFT) & NFSLCK_ACCESSBITS))|| 2790 ((stp->ls_flags & NFSLCK_ACCESSBITS) & 2791 ((new_stp->ls_flags>>NFSLCK_SHIFT)&NFSLCK_ACCESSBITS))){ 2792 ret = nfsrv_clientconflict(stp->ls_clp,&haslock,vp,p); 2793 if (ret == 1) { 2794 /* 2795 * nfsrv_clientconflict() unlocks state 2796 * when it returns non-zero. 2797 */ 2798 free(new_open, M_NFSDSTATE); 2799 free(new_deleg, M_NFSDSTATE); 2800 openstp = NULL; 2801 goto tryagain; 2802 } 2803 if (ret == 2) 2804 error = NFSERR_PERM; 2805 else if (new_stp->ls_flags & NFSLCK_RECLAIM) 2806 error = NFSERR_RECLAIMCONFLICT; 2807 else 2808 error = NFSERR_SHAREDENIED; 2809 if (ret == 0) 2810 NFSUNLOCKSTATE(); 2811 if (haslock) { 2812 NFSLOCKV4ROOTMUTEX(); 2813 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2814 NFSUNLOCKV4ROOTMUTEX(); 2815 } 2816 free(new_open, M_NFSDSTATE); 2817 free(new_deleg, M_NFSDSTATE); 2818 printf("nfsd openctrl unexpected client cnfl\n"); 2819 goto out; 2820 } 2821 } 2822 } 2823 2824 /* 2825 * Check for a conflicting delegation. If one is found, call 2826 * nfsrv_delegconflict() to handle it. If the v4root lock hasn't 2827 * been set yet, it will get the lock. Otherwise, it will recall 2828 * the delegation. Then, we try try again... 2829 * (If NFSLCK_DELEGCUR is set, it has a delegation, so there 2830 * isn't a conflict.) 2831 * I currently believe the conflict algorithm to be: 2832 * For Open with Read Access and Deny None 2833 * - there is a conflict iff a different client has a write delegation 2834 * For Open with other Write Access or any Deny except None 2835 * - there is a conflict if a different client has any delegation 2836 * - there is a conflict if the same client has a read delegation 2837 * (The current consensus is that this last case should be 2838 * considered a conflict since the client with a read delegation 2839 * could have done an Open with ReadAccess and WriteDeny 2840 * locally and then not have checked for the WriteDeny.) 2841 */ 2842 if (!(new_stp->ls_flags & (NFSLCK_DELEGPREV | NFSLCK_DELEGCUR))) { 2843 stp = LIST_FIRST(&lfp->lf_deleg); 2844 while (stp != LIST_END(&lfp->lf_deleg)) { 2845 nstp = LIST_NEXT(stp, ls_file); 2846 if (stp->ls_clp != clp && (stp->ls_flags & NFSLCK_DELEGREAD)) 2847 writedeleg = 0; 2848 else 2849 delegate = 0; 2850 if ((readonly && stp->ls_clp != clp && 2851 (stp->ls_flags & NFSLCK_DELEGWRITE)) || 2852 (!readonly && (stp->ls_clp != clp || 2853 (stp->ls_flags & NFSLCK_DELEGREAD)))) { 2854 if (new_stp->ls_flags & NFSLCK_RECLAIM) { 2855 delegate = 2; 2856 } else { 2857 ret = nfsrv_delegconflict(stp, &haslock, p, vp); 2858 if (ret) { 2859 /* 2860 * nfsrv_delegconflict() unlocks state 2861 * when it returns non-zero. 2862 */ 2863 printf("Nfsd openctrl unexpected deleg cnfl\n"); 2864 free(new_open, M_NFSDSTATE); 2865 free(new_deleg, M_NFSDSTATE); 2866 if (ret == -1) { 2867 openstp = NULL; 2868 goto tryagain; 2869 } 2870 error = ret; 2871 goto out; 2872 } 2873 } 2874 } 2875 stp = nstp; 2876 } 2877 } 2878 2879 /* 2880 * We only get here if there was no open that conflicted. 2881 * If an open for the owner exists, or in the access/deny bits. 2882 * Otherwise it is a new open. If the open_owner hasn't been 2883 * confirmed, replace the open with the new one needing confirmation, 2884 * otherwise add the open. 2885 */ 2886 if (new_stp->ls_flags & NFSLCK_DELEGPREV) { 2887 /* 2888 * Handle NFSLCK_DELEGPREV by searching the old delegations for 2889 * a match. If found, just move the old delegation to the current 2890 * delegation list and issue open. If not found, return 2891 * NFSERR_EXPIRED. 2892 */ 2893 LIST_FOREACH(stp, &clp->lc_olddeleg, ls_list) { 2894 if (stp->ls_lfp == lfp) { 2895 /* Found it */ 2896 if (stp->ls_clp != clp) 2897 panic("olddeleg clp"); 2898 LIST_REMOVE(stp, ls_list); 2899 LIST_REMOVE(stp, ls_hash); 2900 stp->ls_flags &= ~NFSLCK_OLDDELEG; 2901 stp->ls_stateid.seqid = delegstateidp->seqid = 1; 2902 stp->ls_stateid.other[0] = delegstateidp->other[0] = 2903 clp->lc_clientid.lval[0]; 2904 stp->ls_stateid.other[1] = delegstateidp->other[1] = 2905 clp->lc_clientid.lval[1]; 2906 stp->ls_stateid.other[2] = delegstateidp->other[2] = 2907 nfsrv_nextstateindex(clp); 2908 stp->ls_compref = nd->nd_compref; 2909 LIST_INSERT_HEAD(&clp->lc_deleg, stp, ls_list); 2910 LIST_INSERT_HEAD(NFSSTATEHASH(clp, 2911 stp->ls_stateid), stp, ls_hash); 2912 if (stp->ls_flags & NFSLCK_DELEGWRITE) 2913 *rflagsp |= NFSV4OPEN_WRITEDELEGATE; 2914 else 2915 *rflagsp |= NFSV4OPEN_READDELEGATE; 2916 clp->lc_delegtime = NFSD_MONOSEC + 2917 nfsrv_lease + NFSRV_LEASEDELTA; 2918 2919 /* 2920 * Now, do the associated open. 2921 */ 2922 new_open->ls_stateid.seqid = 1; 2923 new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0]; 2924 new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1]; 2925 new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp); 2926 new_open->ls_flags = (new_stp->ls_flags&NFSLCK_DENYBITS)| 2927 NFSLCK_OPEN; 2928 if (stp->ls_flags & NFSLCK_DELEGWRITE) 2929 new_open->ls_flags |= (NFSLCK_READACCESS | 2930 NFSLCK_WRITEACCESS); 2931 else 2932 new_open->ls_flags |= NFSLCK_READACCESS; 2933 new_open->ls_uid = new_stp->ls_uid; 2934 new_open->ls_lfp = lfp; 2935 new_open->ls_clp = clp; 2936 LIST_INIT(&new_open->ls_open); 2937 LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file); 2938 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid), 2939 new_open, ls_hash); 2940 /* 2941 * and handle the open owner 2942 */ 2943 if (ownerstp) { 2944 new_open->ls_openowner = ownerstp; 2945 LIST_INSERT_HEAD(&ownerstp->ls_open,new_open,ls_list); 2946 } else { 2947 new_open->ls_openowner = new_stp; 2948 new_stp->ls_flags = 0; 2949 nfsrvd_refcache(new_stp->ls_op); 2950 new_stp->ls_noopens = 0; 2951 LIST_INIT(&new_stp->ls_open); 2952 LIST_INSERT_HEAD(&new_stp->ls_open, new_open, ls_list); 2953 LIST_INSERT_HEAD(&clp->lc_open, new_stp, ls_list); 2954 *new_stpp = NULL; 2955 nfsstatsv1.srvopenowners++; 2956 nfsrv_openpluslock++; 2957 } 2958 openstp = new_open; 2959 new_open = NULL; 2960 nfsstatsv1.srvopens++; 2961 nfsrv_openpluslock++; 2962 break; 2963 } 2964 } 2965 if (stp == LIST_END(&clp->lc_olddeleg)) 2966 error = NFSERR_EXPIRED; 2967 } else if (new_stp->ls_flags & (NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) { 2968 /* 2969 * Scan to see that no delegation for this client and file 2970 * doesn't already exist. 2971 * There also shouldn't yet be an Open for this file and 2972 * openowner. 2973 */ 2974 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) { 2975 if (stp->ls_clp == clp) 2976 break; 2977 } 2978 if (stp == LIST_END(&lfp->lf_deleg) && openstp == NULL) { 2979 /* 2980 * This is the Claim_Previous case with a delegation 2981 * type != Delegate_None. 2982 */ 2983 /* 2984 * First, add the delegation. (Although we must issue the 2985 * delegation, we can also ask for an immediate return.) 2986 */ 2987 new_deleg->ls_stateid.seqid = delegstateidp->seqid = 1; 2988 new_deleg->ls_stateid.other[0] = delegstateidp->other[0] = 2989 clp->lc_clientid.lval[0]; 2990 new_deleg->ls_stateid.other[1] = delegstateidp->other[1] = 2991 clp->lc_clientid.lval[1]; 2992 new_deleg->ls_stateid.other[2] = delegstateidp->other[2] = 2993 nfsrv_nextstateindex(clp); 2994 if (new_stp->ls_flags & NFSLCK_DELEGWRITE) { 2995 new_deleg->ls_flags = (NFSLCK_DELEGWRITE | 2996 NFSLCK_READACCESS | NFSLCK_WRITEACCESS); 2997 *rflagsp |= NFSV4OPEN_WRITEDELEGATE; 2998 nfsrv_writedelegcnt++; 2999 } else { 3000 new_deleg->ls_flags = (NFSLCK_DELEGREAD | 3001 NFSLCK_READACCESS); 3002 *rflagsp |= NFSV4OPEN_READDELEGATE; 3003 } 3004 new_deleg->ls_uid = new_stp->ls_uid; 3005 new_deleg->ls_lfp = lfp; 3006 new_deleg->ls_clp = clp; 3007 new_deleg->ls_filerev = filerev; 3008 new_deleg->ls_compref = nd->nd_compref; 3009 LIST_INSERT_HEAD(&lfp->lf_deleg, new_deleg, ls_file); 3010 LIST_INSERT_HEAD(NFSSTATEHASH(clp, 3011 new_deleg->ls_stateid), new_deleg, ls_hash); 3012 LIST_INSERT_HEAD(&clp->lc_deleg, new_deleg, ls_list); 3013 new_deleg = NULL; 3014 if (delegate == 2 || nfsrv_issuedelegs == 0 || 3015 (clp->lc_flags & (LCL_CALLBACKSON | LCL_CBDOWN)) != 3016 LCL_CALLBACKSON || 3017 NFSRV_V4DELEGLIMIT(nfsrv_delegatecnt) || 3018 !NFSVNO_DELEGOK(vp)) 3019 *rflagsp |= NFSV4OPEN_RECALL; 3020 nfsstatsv1.srvdelegates++; 3021 nfsrv_openpluslock++; 3022 nfsrv_delegatecnt++; 3023 3024 /* 3025 * Now, do the associated open. 3026 */ 3027 new_open->ls_stateid.seqid = 1; 3028 new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0]; 3029 new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1]; 3030 new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp); 3031 new_open->ls_flags = (new_stp->ls_flags & NFSLCK_DENYBITS) | 3032 NFSLCK_OPEN; 3033 if (new_stp->ls_flags & NFSLCK_DELEGWRITE) 3034 new_open->ls_flags |= (NFSLCK_READACCESS | 3035 NFSLCK_WRITEACCESS); 3036 else 3037 new_open->ls_flags |= NFSLCK_READACCESS; 3038 new_open->ls_uid = new_stp->ls_uid; 3039 new_open->ls_lfp = lfp; 3040 new_open->ls_clp = clp; 3041 LIST_INIT(&new_open->ls_open); 3042 LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file); 3043 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid), 3044 new_open, ls_hash); 3045 /* 3046 * and handle the open owner 3047 */ 3048 if (ownerstp) { 3049 new_open->ls_openowner = ownerstp; 3050 LIST_INSERT_HEAD(&ownerstp->ls_open, new_open, ls_list); 3051 } else { 3052 new_open->ls_openowner = new_stp; 3053 new_stp->ls_flags = 0; 3054 nfsrvd_refcache(new_stp->ls_op); 3055 new_stp->ls_noopens = 0; 3056 LIST_INIT(&new_stp->ls_open); 3057 LIST_INSERT_HEAD(&new_stp->ls_open, new_open, ls_list); 3058 LIST_INSERT_HEAD(&clp->lc_open, new_stp, ls_list); 3059 *new_stpp = NULL; 3060 nfsstatsv1.srvopenowners++; 3061 nfsrv_openpluslock++; 3062 } 3063 openstp = new_open; 3064 new_open = NULL; 3065 nfsstatsv1.srvopens++; 3066 nfsrv_openpluslock++; 3067 } else { 3068 error = NFSERR_RECLAIMCONFLICT; 3069 } 3070 } else if (ownerstp) { 3071 if (ownerstp->ls_flags & NFSLCK_NEEDSCONFIRM) { 3072 /* Replace the open */ 3073 if (ownerstp->ls_op) 3074 nfsrvd_derefcache(ownerstp->ls_op); 3075 ownerstp->ls_op = new_stp->ls_op; 3076 nfsrvd_refcache(ownerstp->ls_op); 3077 ownerstp->ls_seq = new_stp->ls_seq; 3078 *rflagsp |= NFSV4OPEN_RESULTCONFIRM; 3079 stp = LIST_FIRST(&ownerstp->ls_open); 3080 stp->ls_flags = (new_stp->ls_flags & NFSLCK_SHAREBITS) | 3081 NFSLCK_OPEN; 3082 stp->ls_stateid.seqid = 1; 3083 stp->ls_uid = new_stp->ls_uid; 3084 if (lfp != stp->ls_lfp) { 3085 LIST_REMOVE(stp, ls_file); 3086 LIST_INSERT_HEAD(&lfp->lf_open, stp, ls_file); 3087 stp->ls_lfp = lfp; 3088 } 3089 openstp = stp; 3090 } else if (openstp) { 3091 openstp->ls_flags |= (new_stp->ls_flags & NFSLCK_SHAREBITS); 3092 openstp->ls_stateid.seqid++; 3093 if ((nd->nd_flag & ND_NFSV41) != 0 && 3094 openstp->ls_stateid.seqid == 0) 3095 openstp->ls_stateid.seqid = 1; 3096 3097 /* 3098 * This is where we can choose to issue a delegation. 3099 */ 3100 if ((new_stp->ls_flags & NFSLCK_WANTNODELEG) != 0) 3101 *rflagsp |= NFSV4OPEN_WDNOTWANTED; 3102 else if (nfsrv_issuedelegs == 0) 3103 *rflagsp |= NFSV4OPEN_WDSUPPFTYPE; 3104 else if (NFSRV_V4DELEGLIMIT(nfsrv_delegatecnt)) 3105 *rflagsp |= NFSV4OPEN_WDRESOURCE; 3106 else if (delegate == 0 || writedeleg == 0 || 3107 NFSVNO_EXRDONLY(exp) || (readonly != 0 && 3108 nfsrv_writedelegifpos == 0) || 3109 !NFSVNO_DELEGOK(vp) || 3110 (new_stp->ls_flags & NFSLCK_WANTRDELEG) != 0 || 3111 (clp->lc_flags & (LCL_CALLBACKSON | LCL_CBDOWN)) != 3112 LCL_CALLBACKSON) 3113 *rflagsp |= NFSV4OPEN_WDCONTENTION; 3114 else { 3115 new_deleg->ls_stateid.seqid = delegstateidp->seqid = 1; 3116 new_deleg->ls_stateid.other[0] = delegstateidp->other[0] 3117 = clp->lc_clientid.lval[0]; 3118 new_deleg->ls_stateid.other[1] = delegstateidp->other[1] 3119 = clp->lc_clientid.lval[1]; 3120 new_deleg->ls_stateid.other[2] = delegstateidp->other[2] 3121 = nfsrv_nextstateindex(clp); 3122 new_deleg->ls_flags = (NFSLCK_DELEGWRITE | 3123 NFSLCK_READACCESS | NFSLCK_WRITEACCESS); 3124 *rflagsp |= NFSV4OPEN_WRITEDELEGATE; 3125 new_deleg->ls_uid = new_stp->ls_uid; 3126 new_deleg->ls_lfp = lfp; 3127 new_deleg->ls_clp = clp; 3128 new_deleg->ls_filerev = filerev; 3129 new_deleg->ls_compref = nd->nd_compref; 3130 nfsrv_writedelegcnt++; 3131 LIST_INSERT_HEAD(&lfp->lf_deleg, new_deleg, ls_file); 3132 LIST_INSERT_HEAD(NFSSTATEHASH(clp, 3133 new_deleg->ls_stateid), new_deleg, ls_hash); 3134 LIST_INSERT_HEAD(&clp->lc_deleg, new_deleg, ls_list); 3135 new_deleg = NULL; 3136 nfsstatsv1.srvdelegates++; 3137 nfsrv_openpluslock++; 3138 nfsrv_delegatecnt++; 3139 } 3140 } else { 3141 new_open->ls_stateid.seqid = 1; 3142 new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0]; 3143 new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1]; 3144 new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp); 3145 new_open->ls_flags = (new_stp->ls_flags & NFSLCK_SHAREBITS)| 3146 NFSLCK_OPEN; 3147 new_open->ls_uid = new_stp->ls_uid; 3148 new_open->ls_openowner = ownerstp; 3149 new_open->ls_lfp = lfp; 3150 new_open->ls_clp = clp; 3151 LIST_INIT(&new_open->ls_open); 3152 LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file); 3153 LIST_INSERT_HEAD(&ownerstp->ls_open, new_open, ls_list); 3154 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid), 3155 new_open, ls_hash); 3156 openstp = new_open; 3157 new_open = NULL; 3158 nfsstatsv1.srvopens++; 3159 nfsrv_openpluslock++; 3160 3161 /* 3162 * This is where we can choose to issue a delegation. 3163 */ 3164 if ((new_stp->ls_flags & NFSLCK_WANTNODELEG) != 0) 3165 *rflagsp |= NFSV4OPEN_WDNOTWANTED; 3166 else if (nfsrv_issuedelegs == 0) 3167 *rflagsp |= NFSV4OPEN_WDSUPPFTYPE; 3168 else if (NFSRV_V4DELEGLIMIT(nfsrv_delegatecnt)) 3169 *rflagsp |= NFSV4OPEN_WDRESOURCE; 3170 else if (delegate == 0 || (writedeleg == 0 && 3171 readonly == 0) || !NFSVNO_DELEGOK(vp) || 3172 (clp->lc_flags & (LCL_CALLBACKSON | LCL_CBDOWN)) != 3173 LCL_CALLBACKSON) 3174 *rflagsp |= NFSV4OPEN_WDCONTENTION; 3175 else { 3176 new_deleg->ls_stateid.seqid = delegstateidp->seqid = 1; 3177 new_deleg->ls_stateid.other[0] = delegstateidp->other[0] 3178 = clp->lc_clientid.lval[0]; 3179 new_deleg->ls_stateid.other[1] = delegstateidp->other[1] 3180 = clp->lc_clientid.lval[1]; 3181 new_deleg->ls_stateid.other[2] = delegstateidp->other[2] 3182 = nfsrv_nextstateindex(clp); 3183 if (writedeleg && !NFSVNO_EXRDONLY(exp) && 3184 (nfsrv_writedelegifpos || !readonly) && 3185 (new_stp->ls_flags & NFSLCK_WANTRDELEG) == 0) { 3186 new_deleg->ls_flags = (NFSLCK_DELEGWRITE | 3187 NFSLCK_READACCESS | NFSLCK_WRITEACCESS); 3188 *rflagsp |= NFSV4OPEN_WRITEDELEGATE; 3189 nfsrv_writedelegcnt++; 3190 } else { 3191 new_deleg->ls_flags = (NFSLCK_DELEGREAD | 3192 NFSLCK_READACCESS); 3193 *rflagsp |= NFSV4OPEN_READDELEGATE; 3194 } 3195 new_deleg->ls_uid = new_stp->ls_uid; 3196 new_deleg->ls_lfp = lfp; 3197 new_deleg->ls_clp = clp; 3198 new_deleg->ls_filerev = filerev; 3199 new_deleg->ls_compref = nd->nd_compref; 3200 LIST_INSERT_HEAD(&lfp->lf_deleg, new_deleg, ls_file); 3201 LIST_INSERT_HEAD(NFSSTATEHASH(clp, 3202 new_deleg->ls_stateid), new_deleg, ls_hash); 3203 LIST_INSERT_HEAD(&clp->lc_deleg, new_deleg, ls_list); 3204 new_deleg = NULL; 3205 nfsstatsv1.srvdelegates++; 3206 nfsrv_openpluslock++; 3207 nfsrv_delegatecnt++; 3208 } 3209 } 3210 } else { 3211 /* 3212 * New owner case. Start the open_owner sequence with a 3213 * Needs confirmation (unless a reclaim) and hang the 3214 * new open off it. 3215 */ 3216 new_open->ls_stateid.seqid = 1; 3217 new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0]; 3218 new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1]; 3219 new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp); 3220 new_open->ls_flags = (new_stp->ls_flags & NFSLCK_SHAREBITS) | 3221 NFSLCK_OPEN; 3222 new_open->ls_uid = new_stp->ls_uid; 3223 LIST_INIT(&new_open->ls_open); 3224 new_open->ls_openowner = new_stp; 3225 new_open->ls_lfp = lfp; 3226 new_open->ls_clp = clp; 3227 LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file); 3228 if (new_stp->ls_flags & NFSLCK_RECLAIM) { 3229 new_stp->ls_flags = 0; 3230 } else if ((nd->nd_flag & ND_NFSV41) != 0) { 3231 /* NFSv4.1 never needs confirmation. */ 3232 new_stp->ls_flags = 0; 3233 3234 /* 3235 * This is where we can choose to issue a delegation. 3236 */ 3237 if (delegate && nfsrv_issuedelegs && 3238 (writedeleg || readonly) && 3239 (clp->lc_flags & (LCL_CALLBACKSON | LCL_CBDOWN)) == 3240 LCL_CALLBACKSON && 3241 !NFSRV_V4DELEGLIMIT(nfsrv_delegatecnt) && 3242 NFSVNO_DELEGOK(vp) && 3243 ((nd->nd_flag & ND_NFSV41) == 0 || 3244 (new_stp->ls_flags & NFSLCK_WANTNODELEG) == 0)) { 3245 new_deleg->ls_stateid.seqid = 3246 delegstateidp->seqid = 1; 3247 new_deleg->ls_stateid.other[0] = 3248 delegstateidp->other[0] 3249 = clp->lc_clientid.lval[0]; 3250 new_deleg->ls_stateid.other[1] = 3251 delegstateidp->other[1] 3252 = clp->lc_clientid.lval[1]; 3253 new_deleg->ls_stateid.other[2] = 3254 delegstateidp->other[2] 3255 = nfsrv_nextstateindex(clp); 3256 if (writedeleg && !NFSVNO_EXRDONLY(exp) && 3257 (nfsrv_writedelegifpos || !readonly) && 3258 ((nd->nd_flag & ND_NFSV41) == 0 || 3259 (new_stp->ls_flags & NFSLCK_WANTRDELEG) == 3260 0)) { 3261 new_deleg->ls_flags = 3262 (NFSLCK_DELEGWRITE | 3263 NFSLCK_READACCESS | 3264 NFSLCK_WRITEACCESS); 3265 *rflagsp |= NFSV4OPEN_WRITEDELEGATE; 3266 nfsrv_writedelegcnt++; 3267 } else { 3268 new_deleg->ls_flags = 3269 (NFSLCK_DELEGREAD | 3270 NFSLCK_READACCESS); 3271 *rflagsp |= NFSV4OPEN_READDELEGATE; 3272 } 3273 new_deleg->ls_uid = new_stp->ls_uid; 3274 new_deleg->ls_lfp = lfp; 3275 new_deleg->ls_clp = clp; 3276 new_deleg->ls_filerev = filerev; 3277 new_deleg->ls_compref = nd->nd_compref; 3278 LIST_INSERT_HEAD(&lfp->lf_deleg, new_deleg, 3279 ls_file); 3280 LIST_INSERT_HEAD(NFSSTATEHASH(clp, 3281 new_deleg->ls_stateid), new_deleg, ls_hash); 3282 LIST_INSERT_HEAD(&clp->lc_deleg, new_deleg, 3283 ls_list); 3284 new_deleg = NULL; 3285 nfsstatsv1.srvdelegates++; 3286 nfsrv_openpluslock++; 3287 nfsrv_delegatecnt++; 3288 } 3289 /* 3290 * Since NFSv4.1 never does an OpenConfirm, the first 3291 * open state will be acquired here. 3292 */ 3293 if (!(clp->lc_flags & LCL_STAMPEDSTABLE)) { 3294 clp->lc_flags |= LCL_STAMPEDSTABLE; 3295 len = clp->lc_idlen; 3296 NFSBCOPY(clp->lc_id, clidp, len); 3297 gotstate = 1; 3298 } 3299 } else { 3300 *rflagsp |= NFSV4OPEN_RESULTCONFIRM; 3301 new_stp->ls_flags = NFSLCK_NEEDSCONFIRM; 3302 } 3303 nfsrvd_refcache(new_stp->ls_op); 3304 new_stp->ls_noopens = 0; 3305 LIST_INIT(&new_stp->ls_open); 3306 LIST_INSERT_HEAD(&new_stp->ls_open, new_open, ls_list); 3307 LIST_INSERT_HEAD(&clp->lc_open, new_stp, ls_list); 3308 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid), 3309 new_open, ls_hash); 3310 openstp = new_open; 3311 new_open = NULL; 3312 *new_stpp = NULL; 3313 nfsstatsv1.srvopens++; 3314 nfsrv_openpluslock++; 3315 nfsstatsv1.srvopenowners++; 3316 nfsrv_openpluslock++; 3317 } 3318 if (!error) { 3319 stateidp->seqid = openstp->ls_stateid.seqid; 3320 stateidp->other[0] = openstp->ls_stateid.other[0]; 3321 stateidp->other[1] = openstp->ls_stateid.other[1]; 3322 stateidp->other[2] = openstp->ls_stateid.other[2]; 3323 } 3324 NFSUNLOCKSTATE(); 3325 if (haslock) { 3326 NFSLOCKV4ROOTMUTEX(); 3327 nfsv4_unlock(&nfsv4rootfs_lock, 1); 3328 NFSUNLOCKV4ROOTMUTEX(); 3329 } 3330 if (new_open) 3331 free(new_open, M_NFSDSTATE); 3332 if (new_deleg) 3333 free(new_deleg, M_NFSDSTATE); 3334 3335 /* 3336 * If the NFSv4.1 client just acquired its first open, write a timestamp 3337 * to the stable storage file. 3338 */ 3339 if (gotstate != 0) { 3340 nfsrv_writestable(clidp, len, NFSNST_NEWSTATE, p); 3341 nfsrv_backupstable(); 3342 } 3343 3344 out: 3345 free(clidp, M_TEMP); 3346 NFSEXITCODE2(error, nd); 3347 return (error); 3348 } 3349 3350 /* 3351 * Open update. Does the confirm, downgrade and close. 3352 */ 3353 APPLESTATIC int 3354 nfsrv_openupdate(vnode_t vp, struct nfsstate *new_stp, nfsquad_t clientid, 3355 nfsv4stateid_t *stateidp, struct nfsrv_descript *nd, NFSPROC_T *p, 3356 int *retwriteaccessp) 3357 { 3358 struct nfsstate *stp; 3359 struct nfsclient *clp; 3360 struct nfslockfile *lfp; 3361 u_int32_t bits; 3362 int error = 0, gotstate = 0, len = 0; 3363 u_char *clidp = NULL; 3364 3365 /* 3366 * Check for restart conditions (client and server). 3367 */ 3368 error = nfsrv_checkrestart(clientid, new_stp->ls_flags, 3369 &new_stp->ls_stateid, 0); 3370 if (error) 3371 goto out; 3372 3373 clidp = malloc(NFSV4_OPAQUELIMIT, M_TEMP, M_WAITOK); 3374 NFSLOCKSTATE(); 3375 /* 3376 * Get the open structure via clientid and stateid. 3377 */ 3378 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 3379 (nfsquad_t)((u_quad_t)0), 0, nd, p); 3380 if (!error) 3381 error = nfsrv_getstate(clp, &new_stp->ls_stateid, 3382 new_stp->ls_flags, &stp); 3383 3384 /* 3385 * Sanity check the open. 3386 */ 3387 if (!error && (!(stp->ls_flags & NFSLCK_OPEN) || 3388 (!(new_stp->ls_flags & NFSLCK_CONFIRM) && 3389 (stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM)) || 3390 ((new_stp->ls_flags & NFSLCK_CONFIRM) && 3391 (!(stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM))))) 3392 error = NFSERR_BADSTATEID; 3393 3394 if (!error) 3395 error = nfsrv_checkseqid(nd, new_stp->ls_seq, 3396 stp->ls_openowner, new_stp->ls_op); 3397 if (!error && stp->ls_stateid.seqid != new_stp->ls_stateid.seqid && 3398 (((nd->nd_flag & ND_NFSV41) == 0 && 3399 !(new_stp->ls_flags & NFSLCK_CONFIRM)) || 3400 ((nd->nd_flag & ND_NFSV41) != 0 && 3401 new_stp->ls_stateid.seqid != 0))) 3402 error = NFSERR_OLDSTATEID; 3403 if (!error && vnode_vtype(vp) != VREG) { 3404 if (vnode_vtype(vp) == VDIR) 3405 error = NFSERR_ISDIR; 3406 else 3407 error = NFSERR_INVAL; 3408 } 3409 3410 if (error) { 3411 /* 3412 * If a client tries to confirm an Open with a bad 3413 * seqid# and there are no byte range locks or other Opens 3414 * on the openowner, just throw it away, so the next use of the 3415 * openowner will start a fresh seq#. 3416 */ 3417 if (error == NFSERR_BADSEQID && 3418 (new_stp->ls_flags & NFSLCK_CONFIRM) && 3419 nfsrv_nootherstate(stp)) 3420 nfsrv_freeopenowner(stp->ls_openowner, 0, p); 3421 NFSUNLOCKSTATE(); 3422 goto out; 3423 } 3424 3425 /* 3426 * Set the return stateid. 3427 */ 3428 stateidp->seqid = stp->ls_stateid.seqid + 1; 3429 if ((nd->nd_flag & ND_NFSV41) != 0 && stateidp->seqid == 0) 3430 stateidp->seqid = 1; 3431 stateidp->other[0] = stp->ls_stateid.other[0]; 3432 stateidp->other[1] = stp->ls_stateid.other[1]; 3433 stateidp->other[2] = stp->ls_stateid.other[2]; 3434 /* 3435 * Now, handle the three cases. 3436 */ 3437 if (new_stp->ls_flags & NFSLCK_CONFIRM) { 3438 /* 3439 * If the open doesn't need confirmation, it seems to me that 3440 * there is a client error, but I'll just log it and keep going? 3441 */ 3442 if (!(stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM)) 3443 printf("Nfsv4d: stray open confirm\n"); 3444 stp->ls_openowner->ls_flags = 0; 3445 stp->ls_stateid.seqid++; 3446 if ((nd->nd_flag & ND_NFSV41) != 0 && 3447 stp->ls_stateid.seqid == 0) 3448 stp->ls_stateid.seqid = 1; 3449 if (!(clp->lc_flags & LCL_STAMPEDSTABLE)) { 3450 clp->lc_flags |= LCL_STAMPEDSTABLE; 3451 len = clp->lc_idlen; 3452 NFSBCOPY(clp->lc_id, clidp, len); 3453 gotstate = 1; 3454 } 3455 NFSUNLOCKSTATE(); 3456 } else if (new_stp->ls_flags & NFSLCK_CLOSE) { 3457 lfp = stp->ls_lfp; 3458 if (retwriteaccessp != NULL) { 3459 if ((stp->ls_flags & NFSLCK_WRITEACCESS) != 0) 3460 *retwriteaccessp = 1; 3461 else 3462 *retwriteaccessp = 0; 3463 } 3464 if (nfsrv_dolocallocks != 0 && !LIST_EMPTY(&stp->ls_open)) { 3465 /* Get the lf lock */ 3466 nfsrv_locklf(lfp); 3467 NFSUNLOCKSTATE(); 3468 ASSERT_VOP_ELOCKED(vp, "nfsrv_openupdate"); 3469 NFSVOPUNLOCK(vp, 0); 3470 if (nfsrv_freeopen(stp, vp, 1, p) == 0) { 3471 NFSLOCKSTATE(); 3472 nfsrv_unlocklf(lfp); 3473 NFSUNLOCKSTATE(); 3474 } 3475 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 3476 } else { 3477 (void) nfsrv_freeopen(stp, NULL, 0, p); 3478 NFSUNLOCKSTATE(); 3479 } 3480 } else { 3481 /* 3482 * Update the share bits, making sure that the new set are a 3483 * subset of the old ones. 3484 */ 3485 bits = (new_stp->ls_flags & NFSLCK_SHAREBITS); 3486 if (~(stp->ls_flags) & bits) { 3487 NFSUNLOCKSTATE(); 3488 error = NFSERR_INVAL; 3489 goto out; 3490 } 3491 stp->ls_flags = (bits | NFSLCK_OPEN); 3492 stp->ls_stateid.seqid++; 3493 if ((nd->nd_flag & ND_NFSV41) != 0 && 3494 stp->ls_stateid.seqid == 0) 3495 stp->ls_stateid.seqid = 1; 3496 NFSUNLOCKSTATE(); 3497 } 3498 3499 /* 3500 * If the client just confirmed its first open, write a timestamp 3501 * to the stable storage file. 3502 */ 3503 if (gotstate != 0) { 3504 nfsrv_writestable(clidp, len, NFSNST_NEWSTATE, p); 3505 nfsrv_backupstable(); 3506 } 3507 3508 out: 3509 free(clidp, M_TEMP); 3510 NFSEXITCODE2(error, nd); 3511 return (error); 3512 } 3513 3514 /* 3515 * Delegation update. Does the purge and return. 3516 */ 3517 APPLESTATIC int 3518 nfsrv_delegupdate(struct nfsrv_descript *nd, nfsquad_t clientid, 3519 nfsv4stateid_t *stateidp, vnode_t vp, int op, struct ucred *cred, 3520 NFSPROC_T *p, int *retwriteaccessp) 3521 { 3522 struct nfsstate *stp; 3523 struct nfsclient *clp; 3524 int error = 0; 3525 fhandle_t fh; 3526 3527 /* 3528 * Do a sanity check against the file handle for DelegReturn. 3529 */ 3530 if (vp) { 3531 error = nfsvno_getfh(vp, &fh, p); 3532 if (error) 3533 goto out; 3534 } 3535 /* 3536 * Check for restart conditions (client and server). 3537 */ 3538 if (op == NFSV4OP_DELEGRETURN) 3539 error = nfsrv_checkrestart(clientid, NFSLCK_DELEGRETURN, 3540 stateidp, 0); 3541 else 3542 error = nfsrv_checkrestart(clientid, NFSLCK_DELEGPURGE, 3543 stateidp, 0); 3544 3545 NFSLOCKSTATE(); 3546 /* 3547 * Get the open structure via clientid and stateid. 3548 */ 3549 if (!error) 3550 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 3551 (nfsquad_t)((u_quad_t)0), 0, nd, p); 3552 if (error) { 3553 if (error == NFSERR_CBPATHDOWN) 3554 error = 0; 3555 if (error == NFSERR_STALECLIENTID && op == NFSV4OP_DELEGRETURN) 3556 error = NFSERR_STALESTATEID; 3557 } 3558 if (!error && op == NFSV4OP_DELEGRETURN) { 3559 error = nfsrv_getstate(clp, stateidp, NFSLCK_DELEGRETURN, &stp); 3560 if (!error && stp->ls_stateid.seqid != stateidp->seqid && 3561 ((nd->nd_flag & ND_NFSV41) == 0 || stateidp->seqid != 0)) 3562 error = NFSERR_OLDSTATEID; 3563 } 3564 /* 3565 * NFSERR_EXPIRED means that the state has gone away, 3566 * so Delegations have been purged. Just return ok. 3567 */ 3568 if (error == NFSERR_EXPIRED && op == NFSV4OP_DELEGPURGE) { 3569 NFSUNLOCKSTATE(); 3570 error = 0; 3571 goto out; 3572 } 3573 if (error) { 3574 NFSUNLOCKSTATE(); 3575 goto out; 3576 } 3577 3578 if (op == NFSV4OP_DELEGRETURN) { 3579 if (NFSBCMP((caddr_t)&fh, (caddr_t)&stp->ls_lfp->lf_fh, 3580 sizeof (fhandle_t))) { 3581 NFSUNLOCKSTATE(); 3582 error = NFSERR_BADSTATEID; 3583 goto out; 3584 } 3585 if (retwriteaccessp != NULL) { 3586 if ((stp->ls_flags & NFSLCK_DELEGWRITE) != 0) 3587 *retwriteaccessp = 1; 3588 else 3589 *retwriteaccessp = 0; 3590 } 3591 nfsrv_freedeleg(stp); 3592 } else { 3593 nfsrv_freedeleglist(&clp->lc_olddeleg); 3594 } 3595 NFSUNLOCKSTATE(); 3596 error = 0; 3597 3598 out: 3599 NFSEXITCODE(error); 3600 return (error); 3601 } 3602 3603 /* 3604 * Release lock owner. 3605 */ 3606 APPLESTATIC int 3607 nfsrv_releaselckown(struct nfsstate *new_stp, nfsquad_t clientid, 3608 NFSPROC_T *p) 3609 { 3610 struct nfsstate *stp, *nstp, *openstp, *ownstp; 3611 struct nfsclient *clp; 3612 int error = 0; 3613 3614 /* 3615 * Check for restart conditions (client and server). 3616 */ 3617 error = nfsrv_checkrestart(clientid, new_stp->ls_flags, 3618 &new_stp->ls_stateid, 0); 3619 if (error) 3620 goto out; 3621 3622 NFSLOCKSTATE(); 3623 /* 3624 * Get the lock owner by name. 3625 */ 3626 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 3627 (nfsquad_t)((u_quad_t)0), 0, NULL, p); 3628 if (error) { 3629 NFSUNLOCKSTATE(); 3630 goto out; 3631 } 3632 LIST_FOREACH(ownstp, &clp->lc_open, ls_list) { 3633 LIST_FOREACH(openstp, &ownstp->ls_open, ls_list) { 3634 stp = LIST_FIRST(&openstp->ls_open); 3635 while (stp != LIST_END(&openstp->ls_open)) { 3636 nstp = LIST_NEXT(stp, ls_list); 3637 /* 3638 * If the owner matches, check for locks and 3639 * then free or return an error. 3640 */ 3641 if (stp->ls_ownerlen == new_stp->ls_ownerlen && 3642 !NFSBCMP(stp->ls_owner, new_stp->ls_owner, 3643 stp->ls_ownerlen)){ 3644 if (LIST_EMPTY(&stp->ls_lock)) { 3645 nfsrv_freelockowner(stp, NULL, 0, p); 3646 } else { 3647 NFSUNLOCKSTATE(); 3648 error = NFSERR_LOCKSHELD; 3649 goto out; 3650 } 3651 } 3652 stp = nstp; 3653 } 3654 } 3655 } 3656 NFSUNLOCKSTATE(); 3657 3658 out: 3659 NFSEXITCODE(error); 3660 return (error); 3661 } 3662 3663 /* 3664 * Get the file handle for a lock structure. 3665 */ 3666 static int 3667 nfsrv_getlockfh(vnode_t vp, u_short flags, struct nfslockfile *new_lfp, 3668 fhandle_t *nfhp, NFSPROC_T *p) 3669 { 3670 fhandle_t *fhp = NULL; 3671 int error; 3672 3673 /* 3674 * For lock, use the new nfslock structure, otherwise just 3675 * a fhandle_t on the stack. 3676 */ 3677 if (flags & NFSLCK_OPEN) { 3678 KASSERT(new_lfp != NULL, ("nfsrv_getlockfh: new_lfp NULL")); 3679 fhp = &new_lfp->lf_fh; 3680 } else if (nfhp) { 3681 fhp = nfhp; 3682 } else { 3683 panic("nfsrv_getlockfh"); 3684 } 3685 error = nfsvno_getfh(vp, fhp, p); 3686 NFSEXITCODE(error); 3687 return (error); 3688 } 3689 3690 /* 3691 * Get an nfs lock structure. Allocate one, as required, and return a 3692 * pointer to it. 3693 * Returns an NFSERR_xxx upon failure or -1 to indicate no current lock. 3694 */ 3695 static int 3696 nfsrv_getlockfile(u_short flags, struct nfslockfile **new_lfpp, 3697 struct nfslockfile **lfpp, fhandle_t *nfhp, int lockit) 3698 { 3699 struct nfslockfile *lfp; 3700 fhandle_t *fhp = NULL, *tfhp; 3701 struct nfslockhashhead *hp; 3702 struct nfslockfile *new_lfp = NULL; 3703 3704 /* 3705 * For lock, use the new nfslock structure, otherwise just 3706 * a fhandle_t on the stack. 3707 */ 3708 if (flags & NFSLCK_OPEN) { 3709 new_lfp = *new_lfpp; 3710 fhp = &new_lfp->lf_fh; 3711 } else if (nfhp) { 3712 fhp = nfhp; 3713 } else { 3714 panic("nfsrv_getlockfile"); 3715 } 3716 3717 hp = NFSLOCKHASH(fhp); 3718 LIST_FOREACH(lfp, hp, lf_hash) { 3719 tfhp = &lfp->lf_fh; 3720 if (NFSVNO_CMPFH(fhp, tfhp)) { 3721 if (lockit) 3722 nfsrv_locklf(lfp); 3723 *lfpp = lfp; 3724 return (0); 3725 } 3726 } 3727 if (!(flags & NFSLCK_OPEN)) 3728 return (-1); 3729 3730 /* 3731 * No match, so chain the new one into the list. 3732 */ 3733 LIST_INIT(&new_lfp->lf_open); 3734 LIST_INIT(&new_lfp->lf_lock); 3735 LIST_INIT(&new_lfp->lf_deleg); 3736 LIST_INIT(&new_lfp->lf_locallock); 3737 LIST_INIT(&new_lfp->lf_rollback); 3738 new_lfp->lf_locallock_lck.nfslock_usecnt = 0; 3739 new_lfp->lf_locallock_lck.nfslock_lock = 0; 3740 new_lfp->lf_usecount = 0; 3741 LIST_INSERT_HEAD(hp, new_lfp, lf_hash); 3742 *lfpp = new_lfp; 3743 *new_lfpp = NULL; 3744 return (0); 3745 } 3746 3747 /* 3748 * This function adds a nfslock lock structure to the list for the associated 3749 * nfsstate and nfslockfile structures. It will be inserted after the 3750 * entry pointed at by insert_lop. 3751 */ 3752 static void 3753 nfsrv_insertlock(struct nfslock *new_lop, struct nfslock *insert_lop, 3754 struct nfsstate *stp, struct nfslockfile *lfp) 3755 { 3756 struct nfslock *lop, *nlop; 3757 3758 new_lop->lo_stp = stp; 3759 new_lop->lo_lfp = lfp; 3760 3761 if (stp != NULL) { 3762 /* Insert in increasing lo_first order */ 3763 lop = LIST_FIRST(&lfp->lf_lock); 3764 if (lop == LIST_END(&lfp->lf_lock) || 3765 new_lop->lo_first <= lop->lo_first) { 3766 LIST_INSERT_HEAD(&lfp->lf_lock, new_lop, lo_lckfile); 3767 } else { 3768 nlop = LIST_NEXT(lop, lo_lckfile); 3769 while (nlop != LIST_END(&lfp->lf_lock) && 3770 nlop->lo_first < new_lop->lo_first) { 3771 lop = nlop; 3772 nlop = LIST_NEXT(lop, lo_lckfile); 3773 } 3774 LIST_INSERT_AFTER(lop, new_lop, lo_lckfile); 3775 } 3776 } else { 3777 new_lop->lo_lckfile.le_prev = NULL; /* list not used */ 3778 } 3779 3780 /* 3781 * Insert after insert_lop, which is overloaded as stp or lfp for 3782 * an empty list. 3783 */ 3784 if (stp == NULL && (struct nfslockfile *)insert_lop == lfp) 3785 LIST_INSERT_HEAD(&lfp->lf_locallock, new_lop, lo_lckowner); 3786 else if ((struct nfsstate *)insert_lop == stp) 3787 LIST_INSERT_HEAD(&stp->ls_lock, new_lop, lo_lckowner); 3788 else 3789 LIST_INSERT_AFTER(insert_lop, new_lop, lo_lckowner); 3790 if (stp != NULL) { 3791 nfsstatsv1.srvlocks++; 3792 nfsrv_openpluslock++; 3793 } 3794 } 3795 3796 /* 3797 * This function updates the locking for a lock owner and given file. It 3798 * maintains a list of lock ranges ordered on increasing file offset that 3799 * are NFSLCK_READ or NFSLCK_WRITE and non-overlapping (aka POSIX style). 3800 * It always adds new_lop to the list and sometimes uses the one pointed 3801 * at by other_lopp. 3802 */ 3803 static void 3804 nfsrv_updatelock(struct nfsstate *stp, struct nfslock **new_lopp, 3805 struct nfslock **other_lopp, struct nfslockfile *lfp) 3806 { 3807 struct nfslock *new_lop = *new_lopp; 3808 struct nfslock *lop, *tlop, *ilop; 3809 struct nfslock *other_lop = *other_lopp; 3810 int unlock = 0, myfile = 0; 3811 u_int64_t tmp; 3812 3813 /* 3814 * Work down the list until the lock is merged. 3815 */ 3816 if (new_lop->lo_flags & NFSLCK_UNLOCK) 3817 unlock = 1; 3818 if (stp != NULL) { 3819 ilop = (struct nfslock *)stp; 3820 lop = LIST_FIRST(&stp->ls_lock); 3821 } else { 3822 ilop = (struct nfslock *)lfp; 3823 lop = LIST_FIRST(&lfp->lf_locallock); 3824 } 3825 while (lop != NULL) { 3826 /* 3827 * Only check locks for this file that aren't before the start of 3828 * new lock's range. 3829 */ 3830 if (lop->lo_lfp == lfp) { 3831 myfile = 1; 3832 if (lop->lo_end >= new_lop->lo_first) { 3833 if (new_lop->lo_end < lop->lo_first) { 3834 /* 3835 * If the new lock ends before the start of the 3836 * current lock's range, no merge, just insert 3837 * the new lock. 3838 */ 3839 break; 3840 } 3841 if (new_lop->lo_flags == lop->lo_flags || 3842 (new_lop->lo_first <= lop->lo_first && 3843 new_lop->lo_end >= lop->lo_end)) { 3844 /* 3845 * This lock can be absorbed by the new lock/unlock. 3846 * This happens when it covers the entire range 3847 * of the old lock or is contiguous 3848 * with the old lock and is of the same type or an 3849 * unlock. 3850 */ 3851 if (lop->lo_first < new_lop->lo_first) 3852 new_lop->lo_first = lop->lo_first; 3853 if (lop->lo_end > new_lop->lo_end) 3854 new_lop->lo_end = lop->lo_end; 3855 tlop = lop; 3856 lop = LIST_NEXT(lop, lo_lckowner); 3857 nfsrv_freenfslock(tlop); 3858 continue; 3859 } 3860 3861 /* 3862 * All these cases are for contiguous locks that are not the 3863 * same type, so they can't be merged. 3864 */ 3865 if (new_lop->lo_first <= lop->lo_first) { 3866 /* 3867 * This case is where the new lock overlaps with the 3868 * first part of the old lock. Move the start of the 3869 * old lock to just past the end of the new lock. The 3870 * new lock will be inserted in front of the old, since 3871 * ilop hasn't been updated. (We are done now.) 3872 */ 3873 lop->lo_first = new_lop->lo_end; 3874 break; 3875 } 3876 if (new_lop->lo_end >= lop->lo_end) { 3877 /* 3878 * This case is where the new lock overlaps with the 3879 * end of the old lock's range. Move the old lock's 3880 * end to just before the new lock's first and insert 3881 * the new lock after the old lock. 3882 * Might not be done yet, since the new lock could 3883 * overlap further locks with higher ranges. 3884 */ 3885 lop->lo_end = new_lop->lo_first; 3886 ilop = lop; 3887 lop = LIST_NEXT(lop, lo_lckowner); 3888 continue; 3889 } 3890 /* 3891 * The final case is where the new lock's range is in the 3892 * middle of the current lock's and splits the current lock 3893 * up. Use *other_lopp to handle the second part of the 3894 * split old lock range. (We are done now.) 3895 * For unlock, we use new_lop as other_lop and tmp, since 3896 * other_lop and new_lop are the same for this case. 3897 * We noted the unlock case above, so we don't need 3898 * new_lop->lo_flags any longer. 3899 */ 3900 tmp = new_lop->lo_first; 3901 if (other_lop == NULL) { 3902 if (!unlock) 3903 panic("nfsd srv update unlock"); 3904 other_lop = new_lop; 3905 *new_lopp = NULL; 3906 } 3907 other_lop->lo_first = new_lop->lo_end; 3908 other_lop->lo_end = lop->lo_end; 3909 other_lop->lo_flags = lop->lo_flags; 3910 other_lop->lo_stp = stp; 3911 other_lop->lo_lfp = lfp; 3912 lop->lo_end = tmp; 3913 nfsrv_insertlock(other_lop, lop, stp, lfp); 3914 *other_lopp = NULL; 3915 ilop = lop; 3916 break; 3917 } 3918 } 3919 ilop = lop; 3920 lop = LIST_NEXT(lop, lo_lckowner); 3921 if (myfile && (lop == NULL || lop->lo_lfp != lfp)) 3922 break; 3923 } 3924 3925 /* 3926 * Insert the new lock in the list at the appropriate place. 3927 */ 3928 if (!unlock) { 3929 nfsrv_insertlock(new_lop, ilop, stp, lfp); 3930 *new_lopp = NULL; 3931 } 3932 } 3933 3934 /* 3935 * This function handles sequencing of locks, etc. 3936 * It returns an error that indicates what the caller should do. 3937 */ 3938 static int 3939 nfsrv_checkseqid(struct nfsrv_descript *nd, u_int32_t seqid, 3940 struct nfsstate *stp, struct nfsrvcache *op) 3941 { 3942 int error = 0; 3943 3944 if ((nd->nd_flag & ND_NFSV41) != 0) 3945 /* NFSv4.1 ignores the open_seqid and lock_seqid. */ 3946 goto out; 3947 if (op != nd->nd_rp) 3948 panic("nfsrvstate checkseqid"); 3949 if (!(op->rc_flag & RC_INPROG)) 3950 panic("nfsrvstate not inprog"); 3951 if (stp->ls_op && stp->ls_op->rc_refcnt <= 0) { 3952 printf("refcnt=%d\n", stp->ls_op->rc_refcnt); 3953 panic("nfsrvstate op refcnt"); 3954 } 3955 if ((stp->ls_seq + 1) == seqid) { 3956 if (stp->ls_op) 3957 nfsrvd_derefcache(stp->ls_op); 3958 stp->ls_op = op; 3959 nfsrvd_refcache(op); 3960 stp->ls_seq = seqid; 3961 goto out; 3962 } else if (stp->ls_seq == seqid && stp->ls_op && 3963 op->rc_xid == stp->ls_op->rc_xid && 3964 op->rc_refcnt == 0 && 3965 op->rc_reqlen == stp->ls_op->rc_reqlen && 3966 op->rc_cksum == stp->ls_op->rc_cksum) { 3967 if (stp->ls_op->rc_flag & RC_INPROG) { 3968 error = NFSERR_DONTREPLY; 3969 goto out; 3970 } 3971 nd->nd_rp = stp->ls_op; 3972 nd->nd_rp->rc_flag |= RC_INPROG; 3973 nfsrvd_delcache(op); 3974 error = NFSERR_REPLYFROMCACHE; 3975 goto out; 3976 } 3977 error = NFSERR_BADSEQID; 3978 3979 out: 3980 NFSEXITCODE2(error, nd); 3981 return (error); 3982 } 3983 3984 /* 3985 * Get the client ip address for callbacks. If the strings can't be parsed, 3986 * just set lc_program to 0 to indicate no callbacks are possible. 3987 * (For cases where the address can't be parsed or is 0.0.0.0.0.0, set 3988 * the address to the client's transport address. This won't be used 3989 * for callbacks, but can be printed out by nfsstats for info.) 3990 * Return error if the xdr can't be parsed, 0 otherwise. 3991 */ 3992 APPLESTATIC int 3993 nfsrv_getclientipaddr(struct nfsrv_descript *nd, struct nfsclient *clp) 3994 { 3995 u_int32_t *tl; 3996 u_char *cp, *cp2; 3997 int i, j; 3998 struct sockaddr_in *rad, *sad; 3999 u_char protocol[5], addr[24]; 4000 int error = 0, cantparse = 0; 4001 union { 4002 in_addr_t ival; 4003 u_char cval[4]; 4004 } ip; 4005 union { 4006 in_port_t sval; 4007 u_char cval[2]; 4008 } port; 4009 4010 rad = NFSSOCKADDR(clp->lc_req.nr_nam, struct sockaddr_in *); 4011 rad->sin_family = AF_INET; 4012 rad->sin_len = sizeof (struct sockaddr_in); 4013 rad->sin_addr.s_addr = 0; 4014 rad->sin_port = 0; 4015 clp->lc_req.nr_client = NULL; 4016 clp->lc_req.nr_lock = 0; 4017 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 4018 i = fxdr_unsigned(int, *tl); 4019 if (i >= 3 && i <= 4) { 4020 error = nfsrv_mtostr(nd, protocol, i); 4021 if (error) 4022 goto nfsmout; 4023 if (!strcmp(protocol, "tcp")) { 4024 clp->lc_flags |= LCL_TCPCALLBACK; 4025 clp->lc_req.nr_sotype = SOCK_STREAM; 4026 clp->lc_req.nr_soproto = IPPROTO_TCP; 4027 } else if (!strcmp(protocol, "udp")) { 4028 clp->lc_req.nr_sotype = SOCK_DGRAM; 4029 clp->lc_req.nr_soproto = IPPROTO_UDP; 4030 } else { 4031 cantparse = 1; 4032 } 4033 } else { 4034 cantparse = 1; 4035 if (i > 0) { 4036 error = nfsm_advance(nd, NFSM_RNDUP(i), -1); 4037 if (error) 4038 goto nfsmout; 4039 } 4040 } 4041 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 4042 i = fxdr_unsigned(int, *tl); 4043 if (i < 0) { 4044 error = NFSERR_BADXDR; 4045 goto nfsmout; 4046 } else if (i == 0) { 4047 cantparse = 1; 4048 } else if (!cantparse && i <= 23 && i >= 11) { 4049 error = nfsrv_mtostr(nd, addr, i); 4050 if (error) 4051 goto nfsmout; 4052 4053 /* 4054 * Parse out the address fields. We expect 6 decimal numbers 4055 * separated by '.'s. 4056 */ 4057 cp = addr; 4058 i = 0; 4059 while (*cp && i < 6) { 4060 cp2 = cp; 4061 while (*cp2 && *cp2 != '.') 4062 cp2++; 4063 if (*cp2) 4064 *cp2++ = '\0'; 4065 else if (i != 5) { 4066 cantparse = 1; 4067 break; 4068 } 4069 j = nfsrv_getipnumber(cp); 4070 if (j >= 0) { 4071 if (i < 4) 4072 ip.cval[3 - i] = j; 4073 else 4074 port.cval[5 - i] = j; 4075 } else { 4076 cantparse = 1; 4077 break; 4078 } 4079 cp = cp2; 4080 i++; 4081 } 4082 if (!cantparse) { 4083 if (ip.ival != 0x0) { 4084 rad->sin_addr.s_addr = htonl(ip.ival); 4085 rad->sin_port = htons(port.sval); 4086 } else { 4087 cantparse = 1; 4088 } 4089 } 4090 } else { 4091 cantparse = 1; 4092 if (i > 0) { 4093 error = nfsm_advance(nd, NFSM_RNDUP(i), -1); 4094 if (error) 4095 goto nfsmout; 4096 } 4097 } 4098 if (cantparse) { 4099 sad = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in *); 4100 if (sad->sin_family == AF_INET) { 4101 rad->sin_addr.s_addr = sad->sin_addr.s_addr; 4102 rad->sin_port = 0x0; 4103 } 4104 clp->lc_program = 0; 4105 } 4106 nfsmout: 4107 NFSEXITCODE2(error, nd); 4108 return (error); 4109 } 4110 4111 /* 4112 * Turn a string of up to three decimal digits into a number. Return -1 upon 4113 * error. 4114 */ 4115 static int 4116 nfsrv_getipnumber(u_char *cp) 4117 { 4118 int i = 0, j = 0; 4119 4120 while (*cp) { 4121 if (j > 2 || *cp < '0' || *cp > '9') 4122 return (-1); 4123 i *= 10; 4124 i += (*cp - '0'); 4125 cp++; 4126 j++; 4127 } 4128 if (i < 256) 4129 return (i); 4130 return (-1); 4131 } 4132 4133 /* 4134 * This function checks for restart conditions. 4135 */ 4136 static int 4137 nfsrv_checkrestart(nfsquad_t clientid, u_int32_t flags, 4138 nfsv4stateid_t *stateidp, int specialid) 4139 { 4140 int ret = 0; 4141 4142 /* 4143 * First check for a server restart. Open, LockT, ReleaseLockOwner 4144 * and DelegPurge have a clientid, the rest a stateid. 4145 */ 4146 if (flags & 4147 (NFSLCK_OPEN | NFSLCK_TEST | NFSLCK_RELEASE | NFSLCK_DELEGPURGE)) { 4148 if (clientid.lval[0] != nfsrvboottime) { 4149 ret = NFSERR_STALECLIENTID; 4150 goto out; 4151 } 4152 } else if (stateidp->other[0] != nfsrvboottime && 4153 specialid == 0) { 4154 ret = NFSERR_STALESTATEID; 4155 goto out; 4156 } 4157 4158 /* 4159 * Read, Write, Setattr and LockT can return NFSERR_GRACE and do 4160 * not use a lock/open owner seqid#, so the check can be done now. 4161 * (The others will be checked, as required, later.) 4162 */ 4163 if (!(flags & (NFSLCK_CHECK | NFSLCK_TEST))) 4164 goto out; 4165 4166 NFSLOCKSTATE(); 4167 ret = nfsrv_checkgrace(NULL, NULL, flags); 4168 NFSUNLOCKSTATE(); 4169 4170 out: 4171 NFSEXITCODE(ret); 4172 return (ret); 4173 } 4174 4175 /* 4176 * Check for grace. 4177 */ 4178 static int 4179 nfsrv_checkgrace(struct nfsrv_descript *nd, struct nfsclient *clp, 4180 u_int32_t flags) 4181 { 4182 int error = 0, notreclaimed; 4183 struct nfsrv_stable *sp; 4184 4185 if ((nfsrv_stablefirst.nsf_flags & (NFSNSF_UPDATEDONE | 4186 NFSNSF_GRACEOVER)) == 0) { 4187 /* 4188 * First, check to see if all of the clients have done a 4189 * ReclaimComplete. If so, grace can end now. 4190 */ 4191 notreclaimed = 0; 4192 LIST_FOREACH(sp, &nfsrv_stablefirst.nsf_head, nst_list) { 4193 if ((sp->nst_flag & NFSNST_RECLAIMED) == 0) { 4194 notreclaimed = 1; 4195 break; 4196 } 4197 } 4198 if (notreclaimed == 0) 4199 nfsrv_stablefirst.nsf_flags |= (NFSNSF_GRACEOVER | 4200 NFSNSF_NEEDLOCK); 4201 } 4202 4203 if ((nfsrv_stablefirst.nsf_flags & NFSNSF_GRACEOVER) != 0) { 4204 if (flags & NFSLCK_RECLAIM) { 4205 error = NFSERR_NOGRACE; 4206 goto out; 4207 } 4208 } else { 4209 if (!(flags & NFSLCK_RECLAIM)) { 4210 error = NFSERR_GRACE; 4211 goto out; 4212 } 4213 if (nd != NULL && clp != NULL && 4214 (nd->nd_flag & ND_NFSV41) != 0 && 4215 (clp->lc_flags & LCL_RECLAIMCOMPLETE) != 0) { 4216 error = NFSERR_NOGRACE; 4217 goto out; 4218 } 4219 4220 /* 4221 * If grace is almost over and we are still getting Reclaims, 4222 * extend grace a bit. 4223 */ 4224 if ((NFSD_MONOSEC + NFSRV_LEASEDELTA) > 4225 nfsrv_stablefirst.nsf_eograce) 4226 nfsrv_stablefirst.nsf_eograce = NFSD_MONOSEC + 4227 NFSRV_LEASEDELTA; 4228 } 4229 4230 out: 4231 NFSEXITCODE(error); 4232 return (error); 4233 } 4234 4235 /* 4236 * Do a server callback. 4237 */ 4238 static int 4239 nfsrv_docallback(struct nfsclient *clp, int procnum, nfsv4stateid_t *stateidp, 4240 int trunc, fhandle_t *fhp, struct nfsvattr *nap, nfsattrbit_t *attrbitp, 4241 int laytype, NFSPROC_T *p) 4242 { 4243 mbuf_t m; 4244 u_int32_t *tl; 4245 struct nfsrv_descript *nd; 4246 struct ucred *cred; 4247 int error = 0; 4248 u_int32_t callback; 4249 struct nfsdsession *sep = NULL; 4250 uint64_t tval; 4251 4252 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 4253 cred = newnfs_getcred(); 4254 NFSLOCKSTATE(); /* mostly for lc_cbref++ */ 4255 if (clp->lc_flags & LCL_NEEDSCONFIRM) { 4256 NFSUNLOCKSTATE(); 4257 panic("docallb"); 4258 } 4259 clp->lc_cbref++; 4260 4261 /* 4262 * Fill the callback program# and version into the request 4263 * structure for newnfs_connect() to use. 4264 */ 4265 clp->lc_req.nr_prog = clp->lc_program; 4266 #ifdef notnow 4267 if ((clp->lc_flags & LCL_NFSV41) != 0) 4268 clp->lc_req.nr_vers = NFSV41_CBVERS; 4269 else 4270 #endif 4271 clp->lc_req.nr_vers = NFSV4_CBVERS; 4272 4273 /* 4274 * First, fill in some of the fields of nd and cr. 4275 */ 4276 nd->nd_flag = ND_NFSV4; 4277 if (clp->lc_flags & LCL_GSS) 4278 nd->nd_flag |= ND_KERBV; 4279 if ((clp->lc_flags & LCL_NFSV41) != 0) 4280 nd->nd_flag |= ND_NFSV41; 4281 nd->nd_repstat = 0; 4282 cred->cr_uid = clp->lc_uid; 4283 cred->cr_gid = clp->lc_gid; 4284 callback = clp->lc_callback; 4285 NFSUNLOCKSTATE(); 4286 cred->cr_ngroups = 1; 4287 4288 /* 4289 * Get the first mbuf for the request. 4290 */ 4291 MGET(m, M_WAITOK, MT_DATA); 4292 mbuf_setlen(m, 0); 4293 nd->nd_mreq = nd->nd_mb = m; 4294 nd->nd_bpos = NFSMTOD(m, caddr_t); 4295 4296 /* 4297 * and build the callback request. 4298 */ 4299 if (procnum == NFSV4OP_CBGETATTR) { 4300 nd->nd_procnum = NFSV4PROC_CBCOMPOUND; 4301 error = nfsrv_cbcallargs(nd, clp, callback, NFSV4OP_CBGETATTR, 4302 "CB Getattr", &sep); 4303 if (error != 0) { 4304 mbuf_freem(nd->nd_mreq); 4305 goto errout; 4306 } 4307 (void)nfsm_fhtom(nd, (u_int8_t *)fhp, NFSX_MYFH, 0); 4308 (void)nfsrv_putattrbit(nd, attrbitp); 4309 } else if (procnum == NFSV4OP_CBRECALL) { 4310 nd->nd_procnum = NFSV4PROC_CBCOMPOUND; 4311 error = nfsrv_cbcallargs(nd, clp, callback, NFSV4OP_CBRECALL, 4312 "CB Recall", &sep); 4313 if (error != 0) { 4314 mbuf_freem(nd->nd_mreq); 4315 goto errout; 4316 } 4317 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_STATEID); 4318 *tl++ = txdr_unsigned(stateidp->seqid); 4319 NFSBCOPY((caddr_t)stateidp->other, (caddr_t)tl, 4320 NFSX_STATEIDOTHER); 4321 tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED); 4322 if (trunc) 4323 *tl = newnfs_true; 4324 else 4325 *tl = newnfs_false; 4326 (void)nfsm_fhtom(nd, (u_int8_t *)fhp, NFSX_MYFH, 0); 4327 } else if (procnum == NFSV4OP_CBLAYOUTRECALL) { 4328 NFSD_DEBUG(4, "docallback layout recall\n"); 4329 nd->nd_procnum = NFSV4PROC_CBCOMPOUND; 4330 error = nfsrv_cbcallargs(nd, clp, callback, 4331 NFSV4OP_CBLAYOUTRECALL, "CB Reclayout", &sep); 4332 NFSD_DEBUG(4, "aft cbcallargs=%d\n", error); 4333 if (error != 0) { 4334 mbuf_freem(nd->nd_mreq); 4335 goto errout; 4336 } 4337 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 4338 *tl++ = txdr_unsigned(laytype); 4339 *tl++ = txdr_unsigned(NFSLAYOUTIOMODE_ANY); 4340 *tl++ = newnfs_true; 4341 *tl = txdr_unsigned(NFSV4LAYOUTRET_FILE); 4342 nfsm_fhtom(nd, (uint8_t *)fhp, NFSX_MYFH, 0); 4343 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_HYPER + NFSX_STATEID); 4344 tval = 0; 4345 txdr_hyper(tval, tl); tl += 2; 4346 tval = UINT64_MAX; 4347 txdr_hyper(tval, tl); tl += 2; 4348 *tl++ = txdr_unsigned(stateidp->seqid); 4349 NFSBCOPY(stateidp->other, tl, NFSX_STATEIDOTHER); 4350 tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED); 4351 NFSD_DEBUG(4, "aft args\n"); 4352 } else if (procnum == NFSV4PROC_CBNULL) { 4353 nd->nd_procnum = NFSV4PROC_CBNULL; 4354 if ((clp->lc_flags & LCL_NFSV41) != 0) { 4355 error = nfsv4_getcbsession(clp, &sep); 4356 if (error != 0) { 4357 mbuf_freem(nd->nd_mreq); 4358 goto errout; 4359 } 4360 } 4361 } else { 4362 error = NFSERR_SERVERFAULT; 4363 mbuf_freem(nd->nd_mreq); 4364 goto errout; 4365 } 4366 4367 /* 4368 * Call newnfs_connect(), as required, and then newnfs_request(). 4369 */ 4370 (void) newnfs_sndlock(&clp->lc_req.nr_lock); 4371 if (clp->lc_req.nr_client == NULL) { 4372 if ((clp->lc_flags & LCL_NFSV41) != 0) { 4373 error = ECONNREFUSED; 4374 nfsrv_freesession(sep, NULL); 4375 } else if (nd->nd_procnum == NFSV4PROC_CBNULL) 4376 error = newnfs_connect(NULL, &clp->lc_req, cred, 4377 NULL, 1); 4378 else 4379 error = newnfs_connect(NULL, &clp->lc_req, cred, 4380 NULL, 3); 4381 } 4382 newnfs_sndunlock(&clp->lc_req.nr_lock); 4383 NFSD_DEBUG(4, "aft sndunlock=%d\n", error); 4384 if (!error) { 4385 if ((nd->nd_flag & ND_NFSV41) != 0) { 4386 KASSERT(sep != NULL, ("sep NULL")); 4387 if (sep->sess_cbsess.nfsess_xprt != NULL) 4388 error = newnfs_request(nd, NULL, clp, 4389 &clp->lc_req, NULL, NULL, cred, 4390 clp->lc_program, clp->lc_req.nr_vers, NULL, 4391 1, NULL, &sep->sess_cbsess); 4392 else { 4393 /* 4394 * This should probably never occur, but if a 4395 * client somehow does an RPC without a 4396 * SequenceID Op that causes a callback just 4397 * after the nfsd threads have been terminated 4398 * and restared we could conceivably get here 4399 * without a backchannel xprt. 4400 */ 4401 printf("nfsrv_docallback: no xprt\n"); 4402 error = ECONNREFUSED; 4403 } 4404 NFSD_DEBUG(4, "aft newnfs_request=%d\n", error); 4405 nfsrv_freesession(sep, NULL); 4406 } else 4407 error = newnfs_request(nd, NULL, clp, &clp->lc_req, 4408 NULL, NULL, cred, clp->lc_program, 4409 clp->lc_req.nr_vers, NULL, 1, NULL, NULL); 4410 } 4411 errout: 4412 NFSFREECRED(cred); 4413 4414 /* 4415 * If error is set here, the Callback path isn't working 4416 * properly, so twiddle the appropriate LCL_ flags. 4417 * (nd_repstat != 0 indicates the Callback path is working, 4418 * but the callback failed on the client.) 4419 */ 4420 if (error) { 4421 /* 4422 * Mark the callback pathway down, which disabled issuing 4423 * of delegations and gets Renew to return NFSERR_CBPATHDOWN. 4424 */ 4425 NFSLOCKSTATE(); 4426 clp->lc_flags |= LCL_CBDOWN; 4427 NFSUNLOCKSTATE(); 4428 } else { 4429 /* 4430 * Callback worked. If the callback path was down, disable 4431 * callbacks, so no more delegations will be issued. (This 4432 * is done on the assumption that the callback pathway is 4433 * flakey.) 4434 */ 4435 NFSLOCKSTATE(); 4436 if (clp->lc_flags & LCL_CBDOWN) 4437 clp->lc_flags &= ~(LCL_CBDOWN | LCL_CALLBACKSON); 4438 NFSUNLOCKSTATE(); 4439 if (nd->nd_repstat) { 4440 error = nd->nd_repstat; 4441 NFSD_DEBUG(1, "nfsrv_docallback op=%d err=%d\n", 4442 procnum, error); 4443 } else if (error == 0 && procnum == NFSV4OP_CBGETATTR) 4444 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, 4445 NULL, NULL, NULL, NULL, NULL, 0, NULL, NULL, NULL, 4446 p, NULL); 4447 mbuf_freem(nd->nd_mrep); 4448 } 4449 NFSLOCKSTATE(); 4450 clp->lc_cbref--; 4451 if ((clp->lc_flags & LCL_WAKEUPWANTED) && clp->lc_cbref == 0) { 4452 clp->lc_flags &= ~LCL_WAKEUPWANTED; 4453 wakeup(clp); 4454 } 4455 NFSUNLOCKSTATE(); 4456 4457 free(nd, M_TEMP); 4458 NFSEXITCODE(error); 4459 return (error); 4460 } 4461 4462 /* 4463 * Set up the compound RPC for the callback. 4464 */ 4465 static int 4466 nfsrv_cbcallargs(struct nfsrv_descript *nd, struct nfsclient *clp, 4467 uint32_t callback, int op, const char *optag, struct nfsdsession **sepp) 4468 { 4469 uint32_t *tl; 4470 int error, len; 4471 4472 len = strlen(optag); 4473 (void)nfsm_strtom(nd, optag, len); 4474 NFSM_BUILD(tl, uint32_t *, 4 * NFSX_UNSIGNED); 4475 if ((nd->nd_flag & ND_NFSV41) != 0) { 4476 *tl++ = txdr_unsigned(NFSV41_MINORVERSION); 4477 *tl++ = txdr_unsigned(callback); 4478 *tl++ = txdr_unsigned(2); 4479 *tl = txdr_unsigned(NFSV4OP_CBSEQUENCE); 4480 error = nfsv4_setcbsequence(nd, clp, 1, sepp); 4481 if (error != 0) 4482 return (error); 4483 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 4484 *tl = txdr_unsigned(op); 4485 } else { 4486 *tl++ = txdr_unsigned(NFSV4_MINORVERSION); 4487 *tl++ = txdr_unsigned(callback); 4488 *tl++ = txdr_unsigned(1); 4489 *tl = txdr_unsigned(op); 4490 } 4491 return (0); 4492 } 4493 4494 /* 4495 * Return the next index# for a clientid. Mostly just increment and return 4496 * the next one, but... if the 32bit unsigned does actually wrap around, 4497 * it should be rebooted. 4498 * At an average rate of one new client per second, it will wrap around in 4499 * approximately 136 years. (I think the server will have been shut 4500 * down or rebooted before then.) 4501 */ 4502 static u_int32_t 4503 nfsrv_nextclientindex(void) 4504 { 4505 static u_int32_t client_index = 0; 4506 4507 client_index++; 4508 if (client_index != 0) 4509 return (client_index); 4510 4511 printf("%s: out of clientids\n", __func__); 4512 return (client_index); 4513 } 4514 4515 /* 4516 * Return the next index# for a stateid. Mostly just increment and return 4517 * the next one, but... if the 32bit unsigned does actually wrap around 4518 * (will a BSD server stay up that long?), find 4519 * new start and end values. 4520 */ 4521 static u_int32_t 4522 nfsrv_nextstateindex(struct nfsclient *clp) 4523 { 4524 struct nfsstate *stp; 4525 int i; 4526 u_int32_t canuse, min_index, max_index; 4527 4528 if (!(clp->lc_flags & LCL_INDEXNOTOK)) { 4529 clp->lc_stateindex++; 4530 if (clp->lc_stateindex != clp->lc_statemaxindex) 4531 return (clp->lc_stateindex); 4532 } 4533 4534 /* 4535 * Yuck, we've hit the end. 4536 * Look for a new min and max. 4537 */ 4538 min_index = 0; 4539 max_index = 0xffffffff; 4540 for (i = 0; i < nfsrv_statehashsize; i++) { 4541 LIST_FOREACH(stp, &clp->lc_stateid[i], ls_hash) { 4542 if (stp->ls_stateid.other[2] > 0x80000000) { 4543 if (stp->ls_stateid.other[2] < max_index) 4544 max_index = stp->ls_stateid.other[2]; 4545 } else { 4546 if (stp->ls_stateid.other[2] > min_index) 4547 min_index = stp->ls_stateid.other[2]; 4548 } 4549 } 4550 } 4551 4552 /* 4553 * Yikes, highly unlikely, but I'll handle it anyhow. 4554 */ 4555 if (min_index == 0x80000000 && max_index == 0x80000001) { 4556 canuse = 0; 4557 /* 4558 * Loop around until we find an unused entry. Return that 4559 * and set LCL_INDEXNOTOK, so the search will continue next time. 4560 * (This is one of those rare cases where a goto is the 4561 * cleanest way to code the loop.) 4562 */ 4563 tryagain: 4564 for (i = 0; i < nfsrv_statehashsize; i++) { 4565 LIST_FOREACH(stp, &clp->lc_stateid[i], ls_hash) { 4566 if (stp->ls_stateid.other[2] == canuse) { 4567 canuse++; 4568 goto tryagain; 4569 } 4570 } 4571 } 4572 clp->lc_flags |= LCL_INDEXNOTOK; 4573 return (canuse); 4574 } 4575 4576 /* 4577 * Ok to start again from min + 1. 4578 */ 4579 clp->lc_stateindex = min_index + 1; 4580 clp->lc_statemaxindex = max_index; 4581 clp->lc_flags &= ~LCL_INDEXNOTOK; 4582 return (clp->lc_stateindex); 4583 } 4584 4585 /* 4586 * The following functions handle the stable storage file that deals with 4587 * the edge conditions described in RFC3530 Sec. 8.6.3. 4588 * The file is as follows: 4589 * - a single record at the beginning that has the lease time of the 4590 * previous server instance (before the last reboot) and the nfsrvboottime 4591 * values for the previous server boots. 4592 * These previous boot times are used to ensure that the current 4593 * nfsrvboottime does not, somehow, get set to a previous one. 4594 * (This is important so that Stale ClientIDs and StateIDs can 4595 * be recognized.) 4596 * The number of previous nfsvrboottime values precedes the list. 4597 * - followed by some number of appended records with: 4598 * - client id string 4599 * - flag that indicates it is a record revoking state via lease 4600 * expiration or similar 4601 * OR has successfully acquired state. 4602 * These structures vary in length, with the client string at the end, up 4603 * to NFSV4_OPAQUELIMIT in size. 4604 * 4605 * At the end of the grace period, the file is truncated, the first 4606 * record is rewritten with updated information and any acquired state 4607 * records for successful reclaims of state are written. 4608 * 4609 * Subsequent records are appended when the first state is issued to 4610 * a client and when state is revoked for a client. 4611 * 4612 * When reading the file in, state issued records that come later in 4613 * the file override older ones, since the append log is in cronological order. 4614 * If, for some reason, the file can't be read, the grace period is 4615 * immediately terminated and all reclaims get NFSERR_NOGRACE. 4616 */ 4617 4618 /* 4619 * Read in the stable storage file. Called by nfssvc() before the nfsd 4620 * processes start servicing requests. 4621 */ 4622 APPLESTATIC void 4623 nfsrv_setupstable(NFSPROC_T *p) 4624 { 4625 struct nfsrv_stablefirst *sf = &nfsrv_stablefirst; 4626 struct nfsrv_stable *sp, *nsp; 4627 struct nfst_rec *tsp; 4628 int error, i, tryagain; 4629 off_t off = 0; 4630 ssize_t aresid, len; 4631 4632 /* 4633 * If NFSNSF_UPDATEDONE is set, this is a restart of the nfsds without 4634 * a reboot, so state has not been lost. 4635 */ 4636 if (sf->nsf_flags & NFSNSF_UPDATEDONE) 4637 return; 4638 /* 4639 * Set Grace over just until the file reads successfully. 4640 */ 4641 nfsrvboottime = time_second; 4642 LIST_INIT(&sf->nsf_head); 4643 sf->nsf_flags = (NFSNSF_GRACEOVER | NFSNSF_NEEDLOCK); 4644 sf->nsf_eograce = NFSD_MONOSEC + NFSRV_LEASEDELTA; 4645 if (sf->nsf_fp == NULL) 4646 return; 4647 error = NFSD_RDWR(UIO_READ, NFSFPVNODE(sf->nsf_fp), 4648 (caddr_t)&sf->nsf_rec, sizeof (struct nfsf_rec), off, UIO_SYSSPACE, 4649 0, NFSFPCRED(sf->nsf_fp), &aresid, p); 4650 if (error || aresid || sf->nsf_numboots == 0 || 4651 sf->nsf_numboots > NFSNSF_MAXNUMBOOTS) 4652 return; 4653 4654 /* 4655 * Now, read in the boottimes. 4656 */ 4657 sf->nsf_bootvals = (time_t *)malloc((sf->nsf_numboots + 1) * 4658 sizeof (time_t), M_TEMP, M_WAITOK); 4659 off = sizeof (struct nfsf_rec); 4660 error = NFSD_RDWR(UIO_READ, NFSFPVNODE(sf->nsf_fp), 4661 (caddr_t)sf->nsf_bootvals, sf->nsf_numboots * sizeof (time_t), off, 4662 UIO_SYSSPACE, 0, NFSFPCRED(sf->nsf_fp), &aresid, p); 4663 if (error || aresid) { 4664 free(sf->nsf_bootvals, M_TEMP); 4665 sf->nsf_bootvals = NULL; 4666 return; 4667 } 4668 4669 /* 4670 * Make sure this nfsrvboottime is different from all recorded 4671 * previous ones. 4672 */ 4673 do { 4674 tryagain = 0; 4675 for (i = 0; i < sf->nsf_numboots; i++) { 4676 if (nfsrvboottime == sf->nsf_bootvals[i]) { 4677 nfsrvboottime++; 4678 tryagain = 1; 4679 break; 4680 } 4681 } 4682 } while (tryagain); 4683 4684 sf->nsf_flags |= NFSNSF_OK; 4685 off += (sf->nsf_numboots * sizeof (time_t)); 4686 4687 /* 4688 * Read through the file, building a list of records for grace 4689 * checking. 4690 * Each record is between sizeof (struct nfst_rec) and 4691 * sizeof (struct nfst_rec) + NFSV4_OPAQUELIMIT - 1 4692 * and is actually sizeof (struct nfst_rec) + nst_len - 1. 4693 */ 4694 tsp = (struct nfst_rec *)malloc(sizeof (struct nfst_rec) + 4695 NFSV4_OPAQUELIMIT - 1, M_TEMP, M_WAITOK); 4696 do { 4697 error = NFSD_RDWR(UIO_READ, NFSFPVNODE(sf->nsf_fp), 4698 (caddr_t)tsp, sizeof (struct nfst_rec) + NFSV4_OPAQUELIMIT - 1, 4699 off, UIO_SYSSPACE, 0, NFSFPCRED(sf->nsf_fp), &aresid, p); 4700 len = (sizeof (struct nfst_rec) + NFSV4_OPAQUELIMIT - 1) - aresid; 4701 if (error || (len > 0 && (len < sizeof (struct nfst_rec) || 4702 len < (sizeof (struct nfst_rec) + tsp->len - 1)))) { 4703 /* 4704 * Yuck, the file has been corrupted, so just return 4705 * after clearing out any restart state, so the grace period 4706 * is over. 4707 */ 4708 LIST_FOREACH_SAFE(sp, &sf->nsf_head, nst_list, nsp) { 4709 LIST_REMOVE(sp, nst_list); 4710 free(sp, M_TEMP); 4711 } 4712 free(tsp, M_TEMP); 4713 sf->nsf_flags &= ~NFSNSF_OK; 4714 free(sf->nsf_bootvals, M_TEMP); 4715 sf->nsf_bootvals = NULL; 4716 return; 4717 } 4718 if (len > 0) { 4719 off += sizeof (struct nfst_rec) + tsp->len - 1; 4720 /* 4721 * Search the list for a matching client. 4722 */ 4723 LIST_FOREACH(sp, &sf->nsf_head, nst_list) { 4724 if (tsp->len == sp->nst_len && 4725 !NFSBCMP(tsp->client, sp->nst_client, tsp->len)) 4726 break; 4727 } 4728 if (sp == LIST_END(&sf->nsf_head)) { 4729 sp = (struct nfsrv_stable *)malloc(tsp->len + 4730 sizeof (struct nfsrv_stable) - 1, M_TEMP, 4731 M_WAITOK); 4732 NFSBCOPY((caddr_t)tsp, (caddr_t)&sp->nst_rec, 4733 sizeof (struct nfst_rec) + tsp->len - 1); 4734 LIST_INSERT_HEAD(&sf->nsf_head, sp, nst_list); 4735 } else { 4736 if (tsp->flag == NFSNST_REVOKE) 4737 sp->nst_flag |= NFSNST_REVOKE; 4738 else 4739 /* 4740 * A subsequent timestamp indicates the client 4741 * did a setclientid/confirm and any previous 4742 * revoke is no longer relevant. 4743 */ 4744 sp->nst_flag &= ~NFSNST_REVOKE; 4745 } 4746 } 4747 } while (len > 0); 4748 free(tsp, M_TEMP); 4749 sf->nsf_flags = NFSNSF_OK; 4750 sf->nsf_eograce = NFSD_MONOSEC + sf->nsf_lease + 4751 NFSRV_LEASEDELTA; 4752 } 4753 4754 /* 4755 * Update the stable storage file, now that the grace period is over. 4756 */ 4757 APPLESTATIC void 4758 nfsrv_updatestable(NFSPROC_T *p) 4759 { 4760 struct nfsrv_stablefirst *sf = &nfsrv_stablefirst; 4761 struct nfsrv_stable *sp, *nsp; 4762 int i; 4763 struct nfsvattr nva; 4764 vnode_t vp; 4765 #if defined(__FreeBSD_version) && (__FreeBSD_version >= 500000) 4766 mount_t mp = NULL; 4767 #endif 4768 int error; 4769 4770 if (sf->nsf_fp == NULL || (sf->nsf_flags & NFSNSF_UPDATEDONE)) 4771 return; 4772 sf->nsf_flags |= NFSNSF_UPDATEDONE; 4773 /* 4774 * Ok, we need to rewrite the stable storage file. 4775 * - truncate to 0 length 4776 * - write the new first structure 4777 * - loop through the data structures, writing out any that 4778 * have timestamps older than the old boot 4779 */ 4780 if (sf->nsf_bootvals) { 4781 sf->nsf_numboots++; 4782 for (i = sf->nsf_numboots - 2; i >= 0; i--) 4783 sf->nsf_bootvals[i + 1] = sf->nsf_bootvals[i]; 4784 } else { 4785 sf->nsf_numboots = 1; 4786 sf->nsf_bootvals = (time_t *)malloc(sizeof (time_t), 4787 M_TEMP, M_WAITOK); 4788 } 4789 sf->nsf_bootvals[0] = nfsrvboottime; 4790 sf->nsf_lease = nfsrv_lease; 4791 NFSVNO_ATTRINIT(&nva); 4792 NFSVNO_SETATTRVAL(&nva, size, 0); 4793 vp = NFSFPVNODE(sf->nsf_fp); 4794 vn_start_write(vp, &mp, V_WAIT); 4795 if (NFSVOPLOCK(vp, LK_EXCLUSIVE) == 0) { 4796 error = nfsvno_setattr(vp, &nva, NFSFPCRED(sf->nsf_fp), p, 4797 NULL); 4798 NFSVOPUNLOCK(vp, 0); 4799 } else 4800 error = EPERM; 4801 vn_finished_write(mp); 4802 if (!error) 4803 error = NFSD_RDWR(UIO_WRITE, vp, 4804 (caddr_t)&sf->nsf_rec, sizeof (struct nfsf_rec), (off_t)0, 4805 UIO_SYSSPACE, IO_SYNC, NFSFPCRED(sf->nsf_fp), NULL, p); 4806 if (!error) 4807 error = NFSD_RDWR(UIO_WRITE, vp, 4808 (caddr_t)sf->nsf_bootvals, 4809 sf->nsf_numboots * sizeof (time_t), 4810 (off_t)(sizeof (struct nfsf_rec)), 4811 UIO_SYSSPACE, IO_SYNC, NFSFPCRED(sf->nsf_fp), NULL, p); 4812 free(sf->nsf_bootvals, M_TEMP); 4813 sf->nsf_bootvals = NULL; 4814 if (error) { 4815 sf->nsf_flags &= ~NFSNSF_OK; 4816 printf("EEK! Can't write NfsV4 stable storage file\n"); 4817 return; 4818 } 4819 sf->nsf_flags |= NFSNSF_OK; 4820 4821 /* 4822 * Loop through the list and write out timestamp records for 4823 * any clients that successfully reclaimed state. 4824 */ 4825 LIST_FOREACH_SAFE(sp, &sf->nsf_head, nst_list, nsp) { 4826 if (sp->nst_flag & NFSNST_GOTSTATE) { 4827 nfsrv_writestable(sp->nst_client, sp->nst_len, 4828 NFSNST_NEWSTATE, p); 4829 sp->nst_clp->lc_flags |= LCL_STAMPEDSTABLE; 4830 } 4831 LIST_REMOVE(sp, nst_list); 4832 free(sp, M_TEMP); 4833 } 4834 nfsrv_backupstable(); 4835 } 4836 4837 /* 4838 * Append a record to the stable storage file. 4839 */ 4840 APPLESTATIC void 4841 nfsrv_writestable(u_char *client, int len, int flag, NFSPROC_T *p) 4842 { 4843 struct nfsrv_stablefirst *sf = &nfsrv_stablefirst; 4844 struct nfst_rec *sp; 4845 int error; 4846 4847 if (!(sf->nsf_flags & NFSNSF_OK) || sf->nsf_fp == NULL) 4848 return; 4849 sp = (struct nfst_rec *)malloc(sizeof (struct nfst_rec) + 4850 len - 1, M_TEMP, M_WAITOK); 4851 sp->len = len; 4852 NFSBCOPY(client, sp->client, len); 4853 sp->flag = flag; 4854 error = NFSD_RDWR(UIO_WRITE, NFSFPVNODE(sf->nsf_fp), 4855 (caddr_t)sp, sizeof (struct nfst_rec) + len - 1, (off_t)0, 4856 UIO_SYSSPACE, (IO_SYNC | IO_APPEND), NFSFPCRED(sf->nsf_fp), NULL, p); 4857 free(sp, M_TEMP); 4858 if (error) { 4859 sf->nsf_flags &= ~NFSNSF_OK; 4860 printf("EEK! Can't write NfsV4 stable storage file\n"); 4861 } 4862 } 4863 4864 /* 4865 * This function is called during the grace period to mark a client 4866 * that successfully reclaimed state. 4867 */ 4868 static void 4869 nfsrv_markstable(struct nfsclient *clp) 4870 { 4871 struct nfsrv_stable *sp; 4872 4873 /* 4874 * First find the client structure. 4875 */ 4876 LIST_FOREACH(sp, &nfsrv_stablefirst.nsf_head, nst_list) { 4877 if (sp->nst_len == clp->lc_idlen && 4878 !NFSBCMP(sp->nst_client, clp->lc_id, sp->nst_len)) 4879 break; 4880 } 4881 if (sp == LIST_END(&nfsrv_stablefirst.nsf_head)) 4882 return; 4883 4884 /* 4885 * Now, just mark it and set the nfsclient back pointer. 4886 */ 4887 sp->nst_flag |= NFSNST_GOTSTATE; 4888 sp->nst_clp = clp; 4889 } 4890 4891 /* 4892 * This function is called when a NFSv4.1 client does a ReclaimComplete. 4893 * Very similar to nfsrv_markstable(), except for the flag being set. 4894 */ 4895 static void 4896 nfsrv_markreclaim(struct nfsclient *clp) 4897 { 4898 struct nfsrv_stable *sp; 4899 4900 /* 4901 * First find the client structure. 4902 */ 4903 LIST_FOREACH(sp, &nfsrv_stablefirst.nsf_head, nst_list) { 4904 if (sp->nst_len == clp->lc_idlen && 4905 !NFSBCMP(sp->nst_client, clp->lc_id, sp->nst_len)) 4906 break; 4907 } 4908 if (sp == LIST_END(&nfsrv_stablefirst.nsf_head)) 4909 return; 4910 4911 /* 4912 * Now, just set the flag. 4913 */ 4914 sp->nst_flag |= NFSNST_RECLAIMED; 4915 } 4916 4917 /* 4918 * This function is called for a reclaim, to see if it gets grace. 4919 * It returns 0 if a reclaim is allowed, 1 otherwise. 4920 */ 4921 static int 4922 nfsrv_checkstable(struct nfsclient *clp) 4923 { 4924 struct nfsrv_stable *sp; 4925 4926 /* 4927 * First, find the entry for the client. 4928 */ 4929 LIST_FOREACH(sp, &nfsrv_stablefirst.nsf_head, nst_list) { 4930 if (sp->nst_len == clp->lc_idlen && 4931 !NFSBCMP(sp->nst_client, clp->lc_id, sp->nst_len)) 4932 break; 4933 } 4934 4935 /* 4936 * If not in the list, state was revoked or no state was issued 4937 * since the previous reboot, a reclaim is denied. 4938 */ 4939 if (sp == LIST_END(&nfsrv_stablefirst.nsf_head) || 4940 (sp->nst_flag & NFSNST_REVOKE) || 4941 !(nfsrv_stablefirst.nsf_flags & NFSNSF_OK)) 4942 return (1); 4943 return (0); 4944 } 4945 4946 /* 4947 * Test for and try to clear out a conflicting client. This is called by 4948 * nfsrv_lockctrl() and nfsrv_openctrl() when conflicts with other clients 4949 * a found. 4950 * The trick here is that it can't revoke a conflicting client with an 4951 * expired lease unless it holds the v4root lock, so... 4952 * If no v4root lock, get the lock and return 1 to indicate "try again". 4953 * Return 0 to indicate the conflict can't be revoked and 1 to indicate 4954 * the revocation worked and the conflicting client is "bye, bye", so it 4955 * can be tried again. 4956 * Return 2 to indicate that the vnode is VI_DOOMED after NFSVOPLOCK(). 4957 * Unlocks State before a non-zero value is returned. 4958 */ 4959 static int 4960 nfsrv_clientconflict(struct nfsclient *clp, int *haslockp, vnode_t vp, 4961 NFSPROC_T *p) 4962 { 4963 int gotlock, lktype = 0; 4964 4965 /* 4966 * If lease hasn't expired, we can't fix it. 4967 */ 4968 if (clp->lc_expiry >= NFSD_MONOSEC || 4969 !(nfsrv_stablefirst.nsf_flags & NFSNSF_UPDATEDONE)) 4970 return (0); 4971 if (*haslockp == 0) { 4972 NFSUNLOCKSTATE(); 4973 if (vp != NULL) { 4974 lktype = NFSVOPISLOCKED(vp); 4975 NFSVOPUNLOCK(vp, 0); 4976 } 4977 NFSLOCKV4ROOTMUTEX(); 4978 nfsv4_relref(&nfsv4rootfs_lock); 4979 do { 4980 gotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 4981 NFSV4ROOTLOCKMUTEXPTR, NULL); 4982 } while (!gotlock); 4983 NFSUNLOCKV4ROOTMUTEX(); 4984 *haslockp = 1; 4985 if (vp != NULL) { 4986 NFSVOPLOCK(vp, lktype | LK_RETRY); 4987 if ((vp->v_iflag & VI_DOOMED) != 0) 4988 return (2); 4989 } 4990 return (1); 4991 } 4992 NFSUNLOCKSTATE(); 4993 4994 /* 4995 * Ok, we can expire the conflicting client. 4996 */ 4997 nfsrv_writestable(clp->lc_id, clp->lc_idlen, NFSNST_REVOKE, p); 4998 nfsrv_backupstable(); 4999 nfsrv_cleanclient(clp, p); 5000 nfsrv_freedeleglist(&clp->lc_deleg); 5001 nfsrv_freedeleglist(&clp->lc_olddeleg); 5002 LIST_REMOVE(clp, lc_hash); 5003 nfsrv_zapclient(clp, p); 5004 return (1); 5005 } 5006 5007 /* 5008 * Resolve a delegation conflict. 5009 * Returns 0 to indicate the conflict was resolved without sleeping. 5010 * Return -1 to indicate that the caller should check for conflicts again. 5011 * Return > 0 for an error that should be returned, normally NFSERR_DELAY. 5012 * 5013 * Also, manipulate the nfsv4root_lock, as required. It isn't changed 5014 * for a return of 0, since there was no sleep and it could be required 5015 * later. It is released for a return of NFSERR_DELAY, since the caller 5016 * will return that error. It is released when a sleep was done waiting 5017 * for the delegation to be returned or expire (so that other nfsds can 5018 * handle ops). Then, it must be acquired for the write to stable storage. 5019 * (This function is somewhat similar to nfsrv_clientconflict(), but 5020 * the semantics differ in a couple of subtle ways. The return of 0 5021 * indicates the conflict was resolved without sleeping here, not 5022 * that the conflict can't be resolved and the handling of nfsv4root_lock 5023 * differs, as noted above.) 5024 * Unlocks State before returning a non-zero value. 5025 */ 5026 static int 5027 nfsrv_delegconflict(struct nfsstate *stp, int *haslockp, NFSPROC_T *p, 5028 vnode_t vp) 5029 { 5030 struct nfsclient *clp = stp->ls_clp; 5031 int gotlock, error, lktype = 0, retrycnt, zapped_clp; 5032 nfsv4stateid_t tstateid; 5033 fhandle_t tfh; 5034 5035 /* 5036 * If the conflict is with an old delegation... 5037 */ 5038 if (stp->ls_flags & NFSLCK_OLDDELEG) { 5039 /* 5040 * You can delete it, if it has expired. 5041 */ 5042 if (clp->lc_delegtime < NFSD_MONOSEC) { 5043 nfsrv_freedeleg(stp); 5044 NFSUNLOCKSTATE(); 5045 error = -1; 5046 goto out; 5047 } 5048 NFSUNLOCKSTATE(); 5049 /* 5050 * During this delay, the old delegation could expire or it 5051 * could be recovered by the client via an Open with 5052 * CLAIM_DELEGATE_PREV. 5053 * Release the nfsv4root_lock, if held. 5054 */ 5055 if (*haslockp) { 5056 *haslockp = 0; 5057 NFSLOCKV4ROOTMUTEX(); 5058 nfsv4_unlock(&nfsv4rootfs_lock, 1); 5059 NFSUNLOCKV4ROOTMUTEX(); 5060 } 5061 error = NFSERR_DELAY; 5062 goto out; 5063 } 5064 5065 /* 5066 * It's a current delegation, so: 5067 * - check to see if the delegation has expired 5068 * - if so, get the v4root lock and then expire it 5069 */ 5070 if (!(stp->ls_flags & NFSLCK_DELEGRECALL)) { 5071 /* 5072 * - do a recall callback, since not yet done 5073 * For now, never allow truncate to be set. To use 5074 * truncate safely, it must be guaranteed that the 5075 * Remove, Rename or Setattr with size of 0 will 5076 * succeed and that would require major changes to 5077 * the VFS/Vnode OPs. 5078 * Set the expiry time large enough so that it won't expire 5079 * until after the callback, then set it correctly, once 5080 * the callback is done. (The delegation will now time 5081 * out whether or not the Recall worked ok. The timeout 5082 * will be extended when ops are done on the delegation 5083 * stateid, up to the timelimit.) 5084 */ 5085 stp->ls_delegtime = NFSD_MONOSEC + (2 * nfsrv_lease) + 5086 NFSRV_LEASEDELTA; 5087 stp->ls_delegtimelimit = NFSD_MONOSEC + (6 * nfsrv_lease) + 5088 NFSRV_LEASEDELTA; 5089 stp->ls_flags |= NFSLCK_DELEGRECALL; 5090 5091 /* 5092 * Loop NFSRV_CBRETRYCNT times while the CBRecall replies 5093 * NFSERR_BADSTATEID or NFSERR_BADHANDLE. This is done 5094 * in order to try and avoid a race that could happen 5095 * when a CBRecall request passed the Open reply with 5096 * the delegation in it when transitting the network. 5097 * Since nfsrv_docallback will sleep, don't use stp after 5098 * the call. 5099 */ 5100 NFSBCOPY((caddr_t)&stp->ls_stateid, (caddr_t)&tstateid, 5101 sizeof (tstateid)); 5102 NFSBCOPY((caddr_t)&stp->ls_lfp->lf_fh, (caddr_t)&tfh, 5103 sizeof (tfh)); 5104 NFSUNLOCKSTATE(); 5105 if (*haslockp) { 5106 *haslockp = 0; 5107 NFSLOCKV4ROOTMUTEX(); 5108 nfsv4_unlock(&nfsv4rootfs_lock, 1); 5109 NFSUNLOCKV4ROOTMUTEX(); 5110 } 5111 retrycnt = 0; 5112 do { 5113 error = nfsrv_docallback(clp, NFSV4OP_CBRECALL, 5114 &tstateid, 0, &tfh, NULL, NULL, 0, p); 5115 retrycnt++; 5116 } while ((error == NFSERR_BADSTATEID || 5117 error == NFSERR_BADHANDLE) && retrycnt < NFSV4_CBRETRYCNT); 5118 error = NFSERR_DELAY; 5119 goto out; 5120 } 5121 5122 if (clp->lc_expiry >= NFSD_MONOSEC && 5123 stp->ls_delegtime >= NFSD_MONOSEC) { 5124 NFSUNLOCKSTATE(); 5125 /* 5126 * A recall has been done, but it has not yet expired. 5127 * So, RETURN_DELAY. 5128 */ 5129 if (*haslockp) { 5130 *haslockp = 0; 5131 NFSLOCKV4ROOTMUTEX(); 5132 nfsv4_unlock(&nfsv4rootfs_lock, 1); 5133 NFSUNLOCKV4ROOTMUTEX(); 5134 } 5135 error = NFSERR_DELAY; 5136 goto out; 5137 } 5138 5139 /* 5140 * If we don't yet have the lock, just get it and then return, 5141 * since we need that before deleting expired state, such as 5142 * this delegation. 5143 * When getting the lock, unlock the vnode, so other nfsds that 5144 * are in progress, won't get stuck waiting for the vnode lock. 5145 */ 5146 if (*haslockp == 0) { 5147 NFSUNLOCKSTATE(); 5148 if (vp != NULL) { 5149 lktype = NFSVOPISLOCKED(vp); 5150 NFSVOPUNLOCK(vp, 0); 5151 } 5152 NFSLOCKV4ROOTMUTEX(); 5153 nfsv4_relref(&nfsv4rootfs_lock); 5154 do { 5155 gotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 5156 NFSV4ROOTLOCKMUTEXPTR, NULL); 5157 } while (!gotlock); 5158 NFSUNLOCKV4ROOTMUTEX(); 5159 *haslockp = 1; 5160 if (vp != NULL) { 5161 NFSVOPLOCK(vp, lktype | LK_RETRY); 5162 if ((vp->v_iflag & VI_DOOMED) != 0) { 5163 *haslockp = 0; 5164 NFSLOCKV4ROOTMUTEX(); 5165 nfsv4_unlock(&nfsv4rootfs_lock, 1); 5166 NFSUNLOCKV4ROOTMUTEX(); 5167 error = NFSERR_PERM; 5168 goto out; 5169 } 5170 } 5171 error = -1; 5172 goto out; 5173 } 5174 5175 NFSUNLOCKSTATE(); 5176 /* 5177 * Ok, we can delete the expired delegation. 5178 * First, write the Revoke record to stable storage and then 5179 * clear out the conflict. 5180 * Since all other nfsd threads are now blocked, we can safely 5181 * sleep without the state changing. 5182 */ 5183 nfsrv_writestable(clp->lc_id, clp->lc_idlen, NFSNST_REVOKE, p); 5184 nfsrv_backupstable(); 5185 if (clp->lc_expiry < NFSD_MONOSEC) { 5186 nfsrv_cleanclient(clp, p); 5187 nfsrv_freedeleglist(&clp->lc_deleg); 5188 nfsrv_freedeleglist(&clp->lc_olddeleg); 5189 LIST_REMOVE(clp, lc_hash); 5190 zapped_clp = 1; 5191 } else { 5192 nfsrv_freedeleg(stp); 5193 zapped_clp = 0; 5194 } 5195 if (zapped_clp) 5196 nfsrv_zapclient(clp, p); 5197 error = -1; 5198 5199 out: 5200 NFSEXITCODE(error); 5201 return (error); 5202 } 5203 5204 /* 5205 * Check for a remove allowed, if remove is set to 1 and get rid of 5206 * delegations. 5207 */ 5208 APPLESTATIC int 5209 nfsrv_checkremove(vnode_t vp, int remove, NFSPROC_T *p) 5210 { 5211 struct nfsstate *stp; 5212 struct nfslockfile *lfp; 5213 int error, haslock = 0; 5214 fhandle_t nfh; 5215 5216 /* 5217 * First, get the lock file structure. 5218 * (A return of -1 means no associated state, so remove ok.) 5219 */ 5220 error = nfsrv_getlockfh(vp, NFSLCK_CHECK, NULL, &nfh, p); 5221 tryagain: 5222 NFSLOCKSTATE(); 5223 if (!error) 5224 error = nfsrv_getlockfile(NFSLCK_CHECK, NULL, &lfp, &nfh, 0); 5225 if (error) { 5226 NFSUNLOCKSTATE(); 5227 if (haslock) { 5228 NFSLOCKV4ROOTMUTEX(); 5229 nfsv4_unlock(&nfsv4rootfs_lock, 1); 5230 NFSUNLOCKV4ROOTMUTEX(); 5231 } 5232 if (error == -1) 5233 error = 0; 5234 goto out; 5235 } 5236 5237 /* 5238 * Now, we must Recall any delegations. 5239 */ 5240 error = nfsrv_cleandeleg(vp, lfp, NULL, &haslock, p); 5241 if (error) { 5242 /* 5243 * nfsrv_cleandeleg() unlocks state for non-zero 5244 * return. 5245 */ 5246 if (error == -1) 5247 goto tryagain; 5248 if (haslock) { 5249 NFSLOCKV4ROOTMUTEX(); 5250 nfsv4_unlock(&nfsv4rootfs_lock, 1); 5251 NFSUNLOCKV4ROOTMUTEX(); 5252 } 5253 goto out; 5254 } 5255 5256 /* 5257 * Now, look for a conflicting open share. 5258 */ 5259 if (remove) { 5260 /* 5261 * If the entry in the directory was the last reference to the 5262 * corresponding filesystem object, the object can be destroyed 5263 * */ 5264 if(lfp->lf_usecount>1) 5265 LIST_FOREACH(stp, &lfp->lf_open, ls_file) { 5266 if (stp->ls_flags & NFSLCK_WRITEDENY) { 5267 error = NFSERR_FILEOPEN; 5268 break; 5269 } 5270 } 5271 } 5272 5273 NFSUNLOCKSTATE(); 5274 if (haslock) { 5275 NFSLOCKV4ROOTMUTEX(); 5276 nfsv4_unlock(&nfsv4rootfs_lock, 1); 5277 NFSUNLOCKV4ROOTMUTEX(); 5278 } 5279 5280 out: 5281 NFSEXITCODE(error); 5282 return (error); 5283 } 5284 5285 /* 5286 * Clear out all delegations for the file referred to by lfp. 5287 * May return NFSERR_DELAY, if there will be a delay waiting for 5288 * delegations to expire. 5289 * Returns -1 to indicate it slept while recalling a delegation. 5290 * This function has the side effect of deleting the nfslockfile structure, 5291 * if it no longer has associated state and didn't have to sleep. 5292 * Unlocks State before a non-zero value is returned. 5293 */ 5294 static int 5295 nfsrv_cleandeleg(vnode_t vp, struct nfslockfile *lfp, 5296 struct nfsclient *clp, int *haslockp, NFSPROC_T *p) 5297 { 5298 struct nfsstate *stp, *nstp; 5299 int ret = 0; 5300 5301 stp = LIST_FIRST(&lfp->lf_deleg); 5302 while (stp != LIST_END(&lfp->lf_deleg)) { 5303 nstp = LIST_NEXT(stp, ls_file); 5304 if (stp->ls_clp != clp) { 5305 ret = nfsrv_delegconflict(stp, haslockp, p, vp); 5306 if (ret) { 5307 /* 5308 * nfsrv_delegconflict() unlocks state 5309 * when it returns non-zero. 5310 */ 5311 goto out; 5312 } 5313 } 5314 stp = nstp; 5315 } 5316 out: 5317 NFSEXITCODE(ret); 5318 return (ret); 5319 } 5320 5321 /* 5322 * There are certain operations that, when being done outside of NFSv4, 5323 * require that any NFSv4 delegation for the file be recalled. 5324 * This function is to be called for those cases: 5325 * VOP_RENAME() - When a delegation is being recalled for any reason, 5326 * the client may have to do Opens against the server, using the file's 5327 * final component name. If the file has been renamed on the server, 5328 * that component name will be incorrect and the Open will fail. 5329 * VOP_REMOVE() - Theoretically, a client could Open a file after it has 5330 * been removed on the server, if there is a delegation issued to 5331 * that client for the file. I say "theoretically" since clients 5332 * normally do an Access Op before the Open and that Access Op will 5333 * fail with ESTALE. Note that NFSv2 and 3 don't even do Opens, so 5334 * they will detect the file's removal in the same manner. (There is 5335 * one case where RFC3530 allows a client to do an Open without first 5336 * doing an Access Op, which is passage of a check against the ACE 5337 * returned with a Write delegation, but current practice is to ignore 5338 * the ACE and always do an Access Op.) 5339 * Since the functions can only be called with an unlocked vnode, this 5340 * can't be done at this time. 5341 * VOP_ADVLOCK() - When a client holds a delegation, it can issue byte range 5342 * locks locally in the client, which are not visible to the server. To 5343 * deal with this, issuing of delegations for a vnode must be disabled 5344 * and all delegations for the vnode recalled. This is done via the 5345 * second function, using the VV_DISABLEDELEG vflag on the vnode. 5346 */ 5347 APPLESTATIC void 5348 nfsd_recalldelegation(vnode_t vp, NFSPROC_T *p) 5349 { 5350 time_t starttime; 5351 int error; 5352 5353 /* 5354 * First, check to see if the server is currently running and it has 5355 * been called for a regular file when issuing delegations. 5356 */ 5357 if (newnfs_numnfsd == 0 || vp->v_type != VREG || 5358 nfsrv_issuedelegs == 0) 5359 return; 5360 5361 KASSERT((NFSVOPISLOCKED(vp) != LK_EXCLUSIVE), ("vp %p is locked", vp)); 5362 /* 5363 * First, get a reference on the nfsv4rootfs_lock so that an 5364 * exclusive lock cannot be acquired by another thread. 5365 */ 5366 NFSLOCKV4ROOTMUTEX(); 5367 nfsv4_getref(&nfsv4rootfs_lock, NULL, NFSV4ROOTLOCKMUTEXPTR, NULL); 5368 NFSUNLOCKV4ROOTMUTEX(); 5369 5370 /* 5371 * Now, call nfsrv_checkremove() in a loop while it returns 5372 * NFSERR_DELAY. Return upon any other error or when timed out. 5373 */ 5374 starttime = NFSD_MONOSEC; 5375 do { 5376 if (NFSVOPLOCK(vp, LK_EXCLUSIVE) == 0) { 5377 error = nfsrv_checkremove(vp, 0, p); 5378 NFSVOPUNLOCK(vp, 0); 5379 } else 5380 error = EPERM; 5381 if (error == NFSERR_DELAY) { 5382 if (NFSD_MONOSEC - starttime > NFS_REMOVETIMEO) 5383 break; 5384 /* Sleep for a short period of time */ 5385 (void) nfs_catnap(PZERO, 0, "nfsremove"); 5386 } 5387 } while (error == NFSERR_DELAY); 5388 NFSLOCKV4ROOTMUTEX(); 5389 nfsv4_relref(&nfsv4rootfs_lock); 5390 NFSUNLOCKV4ROOTMUTEX(); 5391 } 5392 5393 APPLESTATIC void 5394 nfsd_disabledelegation(vnode_t vp, NFSPROC_T *p) 5395 { 5396 5397 #ifdef VV_DISABLEDELEG 5398 /* 5399 * First, flag issuance of delegations disabled. 5400 */ 5401 atomic_set_long(&vp->v_vflag, VV_DISABLEDELEG); 5402 #endif 5403 5404 /* 5405 * Then call nfsd_recalldelegation() to get rid of all extant 5406 * delegations. 5407 */ 5408 nfsd_recalldelegation(vp, p); 5409 } 5410 5411 /* 5412 * Check for conflicting locks, etc. and then get rid of delegations. 5413 * (At one point I thought that I should get rid of delegations for any 5414 * Setattr, since it could potentially disallow the I/O op (read or write) 5415 * allowed by the delegation. However, Setattr Ops that aren't changing 5416 * the size get a stateid of all 0s, so you can't tell if it is a delegation 5417 * for the same client or a different one, so I decided to only get rid 5418 * of delegations for other clients when the size is being changed.) 5419 * In general, a Setattr can disable NFS I/O Ops that are outstanding, such 5420 * as Write backs, even if there is no delegation, so it really isn't any 5421 * different?) 5422 */ 5423 APPLESTATIC int 5424 nfsrv_checksetattr(vnode_t vp, struct nfsrv_descript *nd, 5425 nfsv4stateid_t *stateidp, struct nfsvattr *nvap, nfsattrbit_t *attrbitp, 5426 struct nfsexstuff *exp, NFSPROC_T *p) 5427 { 5428 struct nfsstate st, *stp = &st; 5429 struct nfslock lo, *lop = &lo; 5430 int error = 0; 5431 nfsquad_t clientid; 5432 5433 if (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_SIZE)) { 5434 stp->ls_flags = (NFSLCK_CHECK | NFSLCK_WRITEACCESS); 5435 lop->lo_first = nvap->na_size; 5436 } else { 5437 stp->ls_flags = 0; 5438 lop->lo_first = 0; 5439 } 5440 if (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_OWNER) || 5441 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_OWNERGROUP) || 5442 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_MODE) || 5443 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_ACL)) 5444 stp->ls_flags |= NFSLCK_SETATTR; 5445 if (stp->ls_flags == 0) 5446 goto out; 5447 lop->lo_end = NFS64BITSSET; 5448 lop->lo_flags = NFSLCK_WRITE; 5449 stp->ls_ownerlen = 0; 5450 stp->ls_op = NULL; 5451 stp->ls_uid = nd->nd_cred->cr_uid; 5452 stp->ls_stateid.seqid = stateidp->seqid; 5453 clientid.lval[0] = stp->ls_stateid.other[0] = stateidp->other[0]; 5454 clientid.lval[1] = stp->ls_stateid.other[1] = stateidp->other[1]; 5455 stp->ls_stateid.other[2] = stateidp->other[2]; 5456 error = nfsrv_lockctrl(vp, &stp, &lop, NULL, clientid, 5457 stateidp, exp, nd, p); 5458 5459 out: 5460 NFSEXITCODE2(error, nd); 5461 return (error); 5462 } 5463 5464 /* 5465 * Check for a write delegation and do a CBGETATTR if there is one, updating 5466 * the attributes, as required. 5467 * Should I return an error if I can't get the attributes? (For now, I'll 5468 * just return ok. 5469 */ 5470 APPLESTATIC int 5471 nfsrv_checkgetattr(struct nfsrv_descript *nd, vnode_t vp, 5472 struct nfsvattr *nvap, nfsattrbit_t *attrbitp, NFSPROC_T *p) 5473 { 5474 struct nfsstate *stp; 5475 struct nfslockfile *lfp; 5476 struct nfsclient *clp; 5477 struct nfsvattr nva; 5478 fhandle_t nfh; 5479 int error = 0; 5480 nfsattrbit_t cbbits; 5481 u_quad_t delegfilerev; 5482 5483 NFSCBGETATTR_ATTRBIT(attrbitp, &cbbits); 5484 if (!NFSNONZERO_ATTRBIT(&cbbits)) 5485 goto out; 5486 if (nfsrv_writedelegcnt == 0) 5487 goto out; 5488 5489 /* 5490 * Get the lock file structure. 5491 * (A return of -1 means no associated state, so return ok.) 5492 */ 5493 error = nfsrv_getlockfh(vp, NFSLCK_CHECK, NULL, &nfh, p); 5494 NFSLOCKSTATE(); 5495 if (!error) 5496 error = nfsrv_getlockfile(NFSLCK_CHECK, NULL, &lfp, &nfh, 0); 5497 if (error) { 5498 NFSUNLOCKSTATE(); 5499 if (error == -1) 5500 error = 0; 5501 goto out; 5502 } 5503 5504 /* 5505 * Now, look for a write delegation. 5506 */ 5507 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) { 5508 if (stp->ls_flags & NFSLCK_DELEGWRITE) 5509 break; 5510 } 5511 if (stp == LIST_END(&lfp->lf_deleg)) { 5512 NFSUNLOCKSTATE(); 5513 goto out; 5514 } 5515 clp = stp->ls_clp; 5516 delegfilerev = stp->ls_filerev; 5517 5518 /* 5519 * If the Write delegation was issued as a part of this Compound RPC 5520 * or if we have an Implied Clientid (used in a previous Op in this 5521 * compound) and it is the client the delegation was issued to, 5522 * just return ok. 5523 * I also assume that it is from the same client iff the network 5524 * host IP address is the same as the callback address. (Not 5525 * exactly correct by the RFC, but avoids a lot of Getattr 5526 * callbacks.) 5527 */ 5528 if (nd->nd_compref == stp->ls_compref || 5529 ((nd->nd_flag & ND_IMPLIEDCLID) && 5530 clp->lc_clientid.qval == nd->nd_clientid.qval) || 5531 nfsaddr2_match(clp->lc_req.nr_nam, nd->nd_nam)) { 5532 NFSUNLOCKSTATE(); 5533 goto out; 5534 } 5535 5536 /* 5537 * We are now done with the delegation state structure, 5538 * so the statelock can be released and we can now tsleep(). 5539 */ 5540 5541 /* 5542 * Now, we must do the CB Getattr callback, to see if Change or Size 5543 * has changed. 5544 */ 5545 if (clp->lc_expiry >= NFSD_MONOSEC) { 5546 NFSUNLOCKSTATE(); 5547 NFSVNO_ATTRINIT(&nva); 5548 nva.na_filerev = NFS64BITSSET; 5549 error = nfsrv_docallback(clp, NFSV4OP_CBGETATTR, NULL, 5550 0, &nfh, &nva, &cbbits, 0, p); 5551 if (!error) { 5552 if ((nva.na_filerev != NFS64BITSSET && 5553 nva.na_filerev > delegfilerev) || 5554 (NFSVNO_ISSETSIZE(&nva) && 5555 nva.na_size != nvap->na_size)) { 5556 error = nfsvno_updfilerev(vp, nvap, nd, p); 5557 if (NFSVNO_ISSETSIZE(&nva)) 5558 nvap->na_size = nva.na_size; 5559 } 5560 } else 5561 error = 0; /* Ignore callback errors for now. */ 5562 } else { 5563 NFSUNLOCKSTATE(); 5564 } 5565 5566 out: 5567 NFSEXITCODE2(error, nd); 5568 return (error); 5569 } 5570 5571 /* 5572 * This function looks for openowners that haven't had any opens for 5573 * a while and throws them away. Called by an nfsd when NFSNSF_NOOPENS 5574 * is set. 5575 */ 5576 APPLESTATIC void 5577 nfsrv_throwawayopens(NFSPROC_T *p) 5578 { 5579 struct nfsclient *clp, *nclp; 5580 struct nfsstate *stp, *nstp; 5581 int i; 5582 5583 NFSLOCKSTATE(); 5584 nfsrv_stablefirst.nsf_flags &= ~NFSNSF_NOOPENS; 5585 /* 5586 * For each client... 5587 */ 5588 for (i = 0; i < nfsrv_clienthashsize; i++) { 5589 LIST_FOREACH_SAFE(clp, &nfsclienthash[i], lc_hash, nclp) { 5590 LIST_FOREACH_SAFE(stp, &clp->lc_open, ls_list, nstp) { 5591 if (LIST_EMPTY(&stp->ls_open) && 5592 (stp->ls_noopens > NFSNOOPEN || 5593 (nfsrv_openpluslock * 2) > 5594 nfsrv_v4statelimit)) 5595 nfsrv_freeopenowner(stp, 0, p); 5596 } 5597 } 5598 } 5599 NFSUNLOCKSTATE(); 5600 } 5601 5602 /* 5603 * This function checks to see if the credentials are the same. 5604 * Returns 1 for not same, 0 otherwise. 5605 */ 5606 static int 5607 nfsrv_notsamecredname(struct nfsrv_descript *nd, struct nfsclient *clp) 5608 { 5609 5610 if (nd->nd_flag & ND_GSS) { 5611 if (!(clp->lc_flags & LCL_GSS)) 5612 return (1); 5613 if (clp->lc_flags & LCL_NAME) { 5614 if (nd->nd_princlen != clp->lc_namelen || 5615 NFSBCMP(nd->nd_principal, clp->lc_name, 5616 clp->lc_namelen)) 5617 return (1); 5618 else 5619 return (0); 5620 } 5621 if (nd->nd_cred->cr_uid == clp->lc_uid) 5622 return (0); 5623 else 5624 return (1); 5625 } else if (clp->lc_flags & LCL_GSS) 5626 return (1); 5627 /* 5628 * For AUTH_SYS, allow the same uid or root. (This is underspecified 5629 * in RFC3530, which talks about principals, but doesn't say anything 5630 * about uids for AUTH_SYS.) 5631 */ 5632 if (nd->nd_cred->cr_uid == clp->lc_uid || nd->nd_cred->cr_uid == 0) 5633 return (0); 5634 else 5635 return (1); 5636 } 5637 5638 /* 5639 * Calculate the lease expiry time. 5640 */ 5641 static time_t 5642 nfsrv_leaseexpiry(void) 5643 { 5644 5645 if (nfsrv_stablefirst.nsf_eograce > NFSD_MONOSEC) 5646 return (NFSD_MONOSEC + 2 * (nfsrv_lease + NFSRV_LEASEDELTA)); 5647 return (NFSD_MONOSEC + nfsrv_lease + NFSRV_LEASEDELTA); 5648 } 5649 5650 /* 5651 * Delay the delegation timeout as far as ls_delegtimelimit, as required. 5652 */ 5653 static void 5654 nfsrv_delaydelegtimeout(struct nfsstate *stp) 5655 { 5656 5657 if ((stp->ls_flags & NFSLCK_DELEGRECALL) == 0) 5658 return; 5659 5660 if ((stp->ls_delegtime + 15) > NFSD_MONOSEC && 5661 stp->ls_delegtime < stp->ls_delegtimelimit) { 5662 stp->ls_delegtime += nfsrv_lease; 5663 if (stp->ls_delegtime > stp->ls_delegtimelimit) 5664 stp->ls_delegtime = stp->ls_delegtimelimit; 5665 } 5666 } 5667 5668 /* 5669 * This function checks to see if there is any other state associated 5670 * with the openowner for this Open. 5671 * It returns 1 if there is no other state, 0 otherwise. 5672 */ 5673 static int 5674 nfsrv_nootherstate(struct nfsstate *stp) 5675 { 5676 struct nfsstate *tstp; 5677 5678 LIST_FOREACH(tstp, &stp->ls_openowner->ls_open, ls_list) { 5679 if (tstp != stp || !LIST_EMPTY(&tstp->ls_lock)) 5680 return (0); 5681 } 5682 return (1); 5683 } 5684 5685 /* 5686 * Create a list of lock deltas (changes to local byte range locking 5687 * that can be rolled back using the list) and apply the changes via 5688 * nfsvno_advlock(). Optionally, lock the list. It is expected that either 5689 * the rollback or update function will be called after this. 5690 * It returns an error (and rolls back, as required), if any nfsvno_advlock() 5691 * call fails. If it returns an error, it will unlock the list. 5692 */ 5693 static int 5694 nfsrv_locallock(vnode_t vp, struct nfslockfile *lfp, int flags, 5695 uint64_t first, uint64_t end, struct nfslockconflict *cfp, NFSPROC_T *p) 5696 { 5697 struct nfslock *lop, *nlop; 5698 int error = 0; 5699 5700 /* Loop through the list of locks. */ 5701 lop = LIST_FIRST(&lfp->lf_locallock); 5702 while (first < end && lop != NULL) { 5703 nlop = LIST_NEXT(lop, lo_lckowner); 5704 if (first >= lop->lo_end) { 5705 /* not there yet */ 5706 lop = nlop; 5707 } else if (first < lop->lo_first) { 5708 /* new one starts before entry in list */ 5709 if (end <= lop->lo_first) { 5710 /* no overlap between old and new */ 5711 error = nfsrv_dolocal(vp, lfp, flags, 5712 NFSLCK_UNLOCK, first, end, cfp, p); 5713 if (error != 0) 5714 break; 5715 first = end; 5716 } else { 5717 /* handle fragment overlapped with new one */ 5718 error = nfsrv_dolocal(vp, lfp, flags, 5719 NFSLCK_UNLOCK, first, lop->lo_first, cfp, 5720 p); 5721 if (error != 0) 5722 break; 5723 first = lop->lo_first; 5724 } 5725 } else { 5726 /* new one overlaps this entry in list */ 5727 if (end <= lop->lo_end) { 5728 /* overlaps all of new one */ 5729 error = nfsrv_dolocal(vp, lfp, flags, 5730 lop->lo_flags, first, end, cfp, p); 5731 if (error != 0) 5732 break; 5733 first = end; 5734 } else { 5735 /* handle fragment overlapped with new one */ 5736 error = nfsrv_dolocal(vp, lfp, flags, 5737 lop->lo_flags, first, lop->lo_end, cfp, p); 5738 if (error != 0) 5739 break; 5740 first = lop->lo_end; 5741 lop = nlop; 5742 } 5743 } 5744 } 5745 if (first < end && error == 0) 5746 /* handle fragment past end of list */ 5747 error = nfsrv_dolocal(vp, lfp, flags, NFSLCK_UNLOCK, first, 5748 end, cfp, p); 5749 5750 NFSEXITCODE(error); 5751 return (error); 5752 } 5753 5754 /* 5755 * Local lock unlock. Unlock all byte ranges that are no longer locked 5756 * by NFSv4. To do this, unlock any subranges of first-->end that 5757 * do not overlap with the byte ranges of any lock in the lfp->lf_lock 5758 * list. This list has all locks for the file held by other 5759 * <clientid, lockowner> tuples. The list is ordered by increasing 5760 * lo_first value, but may have entries that overlap each other, for 5761 * the case of read locks. 5762 */ 5763 static void 5764 nfsrv_localunlock(vnode_t vp, struct nfslockfile *lfp, uint64_t init_first, 5765 uint64_t init_end, NFSPROC_T *p) 5766 { 5767 struct nfslock *lop; 5768 uint64_t first, end, prevfirst; 5769 5770 first = init_first; 5771 end = init_end; 5772 while (first < init_end) { 5773 /* Loop through all nfs locks, adjusting first and end */ 5774 prevfirst = 0; 5775 LIST_FOREACH(lop, &lfp->lf_lock, lo_lckfile) { 5776 KASSERT(prevfirst <= lop->lo_first, 5777 ("nfsv4 locks out of order")); 5778 KASSERT(lop->lo_first < lop->lo_end, 5779 ("nfsv4 bogus lock")); 5780 prevfirst = lop->lo_first; 5781 if (first >= lop->lo_first && 5782 first < lop->lo_end) 5783 /* 5784 * Overlaps with initial part, so trim 5785 * off that initial part by moving first past 5786 * it. 5787 */ 5788 first = lop->lo_end; 5789 else if (end > lop->lo_first && 5790 lop->lo_first > first) { 5791 /* 5792 * This lock defines the end of the 5793 * segment to unlock, so set end to the 5794 * start of it and break out of the loop. 5795 */ 5796 end = lop->lo_first; 5797 break; 5798 } 5799 if (first >= end) 5800 /* 5801 * There is no segment left to do, so 5802 * break out of this loop and then exit 5803 * the outer while() since first will be set 5804 * to end, which must equal init_end here. 5805 */ 5806 break; 5807 } 5808 if (first < end) { 5809 /* Unlock this segment */ 5810 (void) nfsrv_dolocal(vp, lfp, NFSLCK_UNLOCK, 5811 NFSLCK_READ, first, end, NULL, p); 5812 nfsrv_locallock_commit(lfp, NFSLCK_UNLOCK, 5813 first, end); 5814 } 5815 /* 5816 * Now move past this segment and look for any further 5817 * segment in the range, if there is one. 5818 */ 5819 first = end; 5820 end = init_end; 5821 } 5822 } 5823 5824 /* 5825 * Do the local lock operation and update the rollback list, as required. 5826 * Perform the rollback and return the error if nfsvno_advlock() fails. 5827 */ 5828 static int 5829 nfsrv_dolocal(vnode_t vp, struct nfslockfile *lfp, int flags, int oldflags, 5830 uint64_t first, uint64_t end, struct nfslockconflict *cfp, NFSPROC_T *p) 5831 { 5832 struct nfsrollback *rlp; 5833 int error = 0, ltype, oldltype; 5834 5835 if (flags & NFSLCK_WRITE) 5836 ltype = F_WRLCK; 5837 else if (flags & NFSLCK_READ) 5838 ltype = F_RDLCK; 5839 else 5840 ltype = F_UNLCK; 5841 if (oldflags & NFSLCK_WRITE) 5842 oldltype = F_WRLCK; 5843 else if (oldflags & NFSLCK_READ) 5844 oldltype = F_RDLCK; 5845 else 5846 oldltype = F_UNLCK; 5847 if (ltype == oldltype || (oldltype == F_WRLCK && ltype == F_RDLCK)) 5848 /* nothing to do */ 5849 goto out; 5850 error = nfsvno_advlock(vp, ltype, first, end, p); 5851 if (error != 0) { 5852 if (cfp != NULL) { 5853 cfp->cl_clientid.lval[0] = 0; 5854 cfp->cl_clientid.lval[1] = 0; 5855 cfp->cl_first = 0; 5856 cfp->cl_end = NFS64BITSSET; 5857 cfp->cl_flags = NFSLCK_WRITE; 5858 cfp->cl_ownerlen = 5; 5859 NFSBCOPY("LOCAL", cfp->cl_owner, 5); 5860 } 5861 nfsrv_locallock_rollback(vp, lfp, p); 5862 } else if (ltype != F_UNLCK) { 5863 rlp = malloc(sizeof (struct nfsrollback), M_NFSDROLLBACK, 5864 M_WAITOK); 5865 rlp->rlck_first = first; 5866 rlp->rlck_end = end; 5867 rlp->rlck_type = oldltype; 5868 LIST_INSERT_HEAD(&lfp->lf_rollback, rlp, rlck_list); 5869 } 5870 5871 out: 5872 NFSEXITCODE(error); 5873 return (error); 5874 } 5875 5876 /* 5877 * Roll back local lock changes and free up the rollback list. 5878 */ 5879 static void 5880 nfsrv_locallock_rollback(vnode_t vp, struct nfslockfile *lfp, NFSPROC_T *p) 5881 { 5882 struct nfsrollback *rlp, *nrlp; 5883 5884 LIST_FOREACH_SAFE(rlp, &lfp->lf_rollback, rlck_list, nrlp) { 5885 (void) nfsvno_advlock(vp, rlp->rlck_type, rlp->rlck_first, 5886 rlp->rlck_end, p); 5887 free(rlp, M_NFSDROLLBACK); 5888 } 5889 LIST_INIT(&lfp->lf_rollback); 5890 } 5891 5892 /* 5893 * Update local lock list and delete rollback list (ie now committed to the 5894 * local locks). Most of the work is done by the internal function. 5895 */ 5896 static void 5897 nfsrv_locallock_commit(struct nfslockfile *lfp, int flags, uint64_t first, 5898 uint64_t end) 5899 { 5900 struct nfsrollback *rlp, *nrlp; 5901 struct nfslock *new_lop, *other_lop; 5902 5903 new_lop = malloc(sizeof (struct nfslock), M_NFSDLOCK, M_WAITOK); 5904 if (flags & (NFSLCK_READ | NFSLCK_WRITE)) 5905 other_lop = malloc(sizeof (struct nfslock), M_NFSDLOCK, 5906 M_WAITOK); 5907 else 5908 other_lop = NULL; 5909 new_lop->lo_flags = flags; 5910 new_lop->lo_first = first; 5911 new_lop->lo_end = end; 5912 nfsrv_updatelock(NULL, &new_lop, &other_lop, lfp); 5913 if (new_lop != NULL) 5914 free(new_lop, M_NFSDLOCK); 5915 if (other_lop != NULL) 5916 free(other_lop, M_NFSDLOCK); 5917 5918 /* and get rid of the rollback list */ 5919 LIST_FOREACH_SAFE(rlp, &lfp->lf_rollback, rlck_list, nrlp) 5920 free(rlp, M_NFSDROLLBACK); 5921 LIST_INIT(&lfp->lf_rollback); 5922 } 5923 5924 /* 5925 * Lock the struct nfslockfile for local lock updating. 5926 */ 5927 static void 5928 nfsrv_locklf(struct nfslockfile *lfp) 5929 { 5930 int gotlock; 5931 5932 /* lf_usecount ensures *lfp won't be free'd */ 5933 lfp->lf_usecount++; 5934 do { 5935 gotlock = nfsv4_lock(&lfp->lf_locallock_lck, 1, NULL, 5936 NFSSTATEMUTEXPTR, NULL); 5937 } while (gotlock == 0); 5938 lfp->lf_usecount--; 5939 } 5940 5941 /* 5942 * Unlock the struct nfslockfile after local lock updating. 5943 */ 5944 static void 5945 nfsrv_unlocklf(struct nfslockfile *lfp) 5946 { 5947 5948 nfsv4_unlock(&lfp->lf_locallock_lck, 0); 5949 } 5950 5951 /* 5952 * Clear out all state for the NFSv4 server. 5953 * Must be called by a thread that can sleep when no nfsds are running. 5954 */ 5955 void 5956 nfsrv_throwawayallstate(NFSPROC_T *p) 5957 { 5958 struct nfsclient *clp, *nclp; 5959 struct nfslockfile *lfp, *nlfp; 5960 int i; 5961 5962 /* 5963 * For each client, clean out the state and then free the structure. 5964 */ 5965 for (i = 0; i < nfsrv_clienthashsize; i++) { 5966 LIST_FOREACH_SAFE(clp, &nfsclienthash[i], lc_hash, nclp) { 5967 nfsrv_cleanclient(clp, p); 5968 nfsrv_freedeleglist(&clp->lc_deleg); 5969 nfsrv_freedeleglist(&clp->lc_olddeleg); 5970 free(clp->lc_stateid, M_NFSDCLIENT); 5971 free(clp, M_NFSDCLIENT); 5972 } 5973 } 5974 5975 /* 5976 * Also, free up any remaining lock file structures. 5977 */ 5978 for (i = 0; i < nfsrv_lockhashsize; i++) { 5979 LIST_FOREACH_SAFE(lfp, &nfslockhash[i], lf_hash, nlfp) { 5980 printf("nfsd unload: fnd a lock file struct\n"); 5981 nfsrv_freenfslockfile(lfp); 5982 } 5983 } 5984 5985 /* And get rid of the deviceid structures and layouts. */ 5986 nfsrv_freealllayoutsanddevids(); 5987 } 5988 5989 /* 5990 * Check the sequence# for the session and slot provided as an argument. 5991 * Also, renew the lease if the session will return NFS_OK. 5992 */ 5993 int 5994 nfsrv_checksequence(struct nfsrv_descript *nd, uint32_t sequenceid, 5995 uint32_t *highest_slotidp, uint32_t *target_highest_slotidp, int cache_this, 5996 uint32_t *sflagsp, NFSPROC_T *p) 5997 { 5998 struct nfsdsession *sep; 5999 struct nfssessionhash *shp; 6000 int error; 6001 SVCXPRT *savxprt; 6002 6003 shp = NFSSESSIONHASH(nd->nd_sessionid); 6004 NFSLOCKSESSION(shp); 6005 sep = nfsrv_findsession(nd->nd_sessionid); 6006 if (sep == NULL) { 6007 NFSUNLOCKSESSION(shp); 6008 return (NFSERR_BADSESSION); 6009 } 6010 error = nfsv4_seqsession(sequenceid, nd->nd_slotid, *highest_slotidp, 6011 sep->sess_slots, NULL, NFSV4_SLOTS - 1); 6012 if (error != 0) { 6013 NFSUNLOCKSESSION(shp); 6014 return (error); 6015 } 6016 if (cache_this != 0) 6017 nd->nd_flag |= ND_SAVEREPLY; 6018 /* Renew the lease. */ 6019 sep->sess_clp->lc_expiry = nfsrv_leaseexpiry(); 6020 nd->nd_clientid.qval = sep->sess_clp->lc_clientid.qval; 6021 nd->nd_flag |= ND_IMPLIEDCLID; 6022 6023 /* 6024 * If this session handles the backchannel, save the nd_xprt for this 6025 * RPC, since this is the one being used. 6026 * RFC-5661 specifies that the fore channel will be implicitly 6027 * bound by a Sequence operation. However, since some NFSv4.1 clients 6028 * erroneously assumed that the back channel would be implicitly 6029 * bound as well, do the implicit binding unless a 6030 * BindConnectiontoSession has already been done on the session. 6031 */ 6032 if (sep->sess_clp->lc_req.nr_client != NULL && 6033 sep->sess_cbsess.nfsess_xprt != nd->nd_xprt && 6034 (sep->sess_crflags & NFSV4CRSESS_CONNBACKCHAN) != 0 && 6035 (sep->sess_clp->lc_flags & LCL_DONEBINDCONN) == 0) { 6036 NFSD_DEBUG(2, 6037 "nfsrv_checksequence: implicit back channel bind\n"); 6038 savxprt = sep->sess_cbsess.nfsess_xprt; 6039 SVC_ACQUIRE(nd->nd_xprt); 6040 nd->nd_xprt->xp_p2 = 6041 sep->sess_clp->lc_req.nr_client->cl_private; 6042 nd->nd_xprt->xp_idletimeout = 0; /* Disable timeout. */ 6043 sep->sess_cbsess.nfsess_xprt = nd->nd_xprt; 6044 if (savxprt != NULL) 6045 SVC_RELEASE(savxprt); 6046 } 6047 6048 *sflagsp = 0; 6049 if (sep->sess_clp->lc_req.nr_client == NULL) 6050 *sflagsp |= NFSV4SEQ_CBPATHDOWN; 6051 NFSUNLOCKSESSION(shp); 6052 if (error == NFSERR_EXPIRED) { 6053 *sflagsp |= NFSV4SEQ_EXPIREDALLSTATEREVOKED; 6054 error = 0; 6055 } else if (error == NFSERR_ADMINREVOKED) { 6056 *sflagsp |= NFSV4SEQ_ADMINSTATEREVOKED; 6057 error = 0; 6058 } 6059 *highest_slotidp = *target_highest_slotidp = NFSV4_SLOTS - 1; 6060 return (0); 6061 } 6062 6063 /* 6064 * Check/set reclaim complete for this session/clientid. 6065 */ 6066 int 6067 nfsrv_checkreclaimcomplete(struct nfsrv_descript *nd) 6068 { 6069 struct nfsdsession *sep; 6070 struct nfssessionhash *shp; 6071 int error = 0; 6072 6073 shp = NFSSESSIONHASH(nd->nd_sessionid); 6074 NFSLOCKSTATE(); 6075 NFSLOCKSESSION(shp); 6076 sep = nfsrv_findsession(nd->nd_sessionid); 6077 if (sep == NULL) { 6078 NFSUNLOCKSESSION(shp); 6079 NFSUNLOCKSTATE(); 6080 return (NFSERR_BADSESSION); 6081 } 6082 6083 /* Check to see if reclaim complete has already happened. */ 6084 if ((sep->sess_clp->lc_flags & LCL_RECLAIMCOMPLETE) != 0) 6085 error = NFSERR_COMPLETEALREADY; 6086 else { 6087 sep->sess_clp->lc_flags |= LCL_RECLAIMCOMPLETE; 6088 nfsrv_markreclaim(sep->sess_clp); 6089 } 6090 NFSUNLOCKSESSION(shp); 6091 NFSUNLOCKSTATE(); 6092 return (error); 6093 } 6094 6095 /* 6096 * Cache the reply in a session slot. 6097 */ 6098 void 6099 nfsrv_cache_session(uint8_t *sessionid, uint32_t slotid, int repstat, 6100 struct mbuf **m) 6101 { 6102 struct nfsdsession *sep; 6103 struct nfssessionhash *shp; 6104 6105 shp = NFSSESSIONHASH(sessionid); 6106 NFSLOCKSESSION(shp); 6107 sep = nfsrv_findsession(sessionid); 6108 if (sep == NULL) { 6109 NFSUNLOCKSESSION(shp); 6110 printf("nfsrv_cache_session: no session\n"); 6111 m_freem(*m); 6112 return; 6113 } 6114 nfsv4_seqsess_cacherep(slotid, sep->sess_slots, repstat, m); 6115 NFSUNLOCKSESSION(shp); 6116 } 6117 6118 /* 6119 * Search for a session that matches the sessionid. 6120 */ 6121 static struct nfsdsession * 6122 nfsrv_findsession(uint8_t *sessionid) 6123 { 6124 struct nfsdsession *sep; 6125 struct nfssessionhash *shp; 6126 6127 shp = NFSSESSIONHASH(sessionid); 6128 LIST_FOREACH(sep, &shp->list, sess_hash) { 6129 if (!NFSBCMP(sessionid, sep->sess_sessionid, NFSX_V4SESSIONID)) 6130 break; 6131 } 6132 return (sep); 6133 } 6134 6135 /* 6136 * Destroy a session. 6137 */ 6138 int 6139 nfsrv_destroysession(struct nfsrv_descript *nd, uint8_t *sessionid) 6140 { 6141 int error, igotlock, samesess; 6142 6143 samesess = 0; 6144 if (!NFSBCMP(sessionid, nd->nd_sessionid, NFSX_V4SESSIONID) && 6145 (nd->nd_flag & ND_HASSEQUENCE) != 0) { 6146 samesess = 1; 6147 if ((nd->nd_flag & ND_LASTOP) == 0) 6148 return (NFSERR_BADSESSION); 6149 } 6150 6151 /* Lock out other nfsd threads */ 6152 NFSLOCKV4ROOTMUTEX(); 6153 nfsv4_relref(&nfsv4rootfs_lock); 6154 do { 6155 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 6156 NFSV4ROOTLOCKMUTEXPTR, NULL); 6157 } while (igotlock == 0); 6158 NFSUNLOCKV4ROOTMUTEX(); 6159 6160 error = nfsrv_freesession(NULL, sessionid); 6161 if (error == 0 && samesess != 0) 6162 nd->nd_flag &= ~ND_HASSEQUENCE; 6163 6164 NFSLOCKV4ROOTMUTEX(); 6165 nfsv4_unlock(&nfsv4rootfs_lock, 1); 6166 NFSUNLOCKV4ROOTMUTEX(); 6167 return (error); 6168 } 6169 6170 /* 6171 * Bind a connection to a session. 6172 * For now, only certain variants are supported, since the current session 6173 * structure can only handle a single backchannel entry, which will be 6174 * applied to all connections if it is set. 6175 */ 6176 int 6177 nfsrv_bindconnsess(struct nfsrv_descript *nd, uint8_t *sessionid, int *foreaftp) 6178 { 6179 struct nfssessionhash *shp; 6180 struct nfsdsession *sep; 6181 struct nfsclient *clp; 6182 SVCXPRT *savxprt; 6183 int error; 6184 6185 error = 0; 6186 shp = NFSSESSIONHASH(sessionid); 6187 NFSLOCKSTATE(); 6188 NFSLOCKSESSION(shp); 6189 sep = nfsrv_findsession(sessionid); 6190 if (sep != NULL) { 6191 clp = sep->sess_clp; 6192 if (*foreaftp == NFSCDFC4_BACK || 6193 *foreaftp == NFSCDFC4_BACK_OR_BOTH || 6194 *foreaftp == NFSCDFC4_FORE_OR_BOTH) { 6195 /* Try to set up a backchannel. */ 6196 if (clp->lc_req.nr_client == NULL) { 6197 NFSD_DEBUG(2, "nfsrv_bindconnsess: acquire " 6198 "backchannel\n"); 6199 clp->lc_req.nr_client = (struct __rpc_client *) 6200 clnt_bck_create(nd->nd_xprt->xp_socket, 6201 sep->sess_cbprogram, NFSV4_CBVERS); 6202 } 6203 if (clp->lc_req.nr_client != NULL) { 6204 NFSD_DEBUG(2, "nfsrv_bindconnsess: set up " 6205 "backchannel\n"); 6206 savxprt = sep->sess_cbsess.nfsess_xprt; 6207 SVC_ACQUIRE(nd->nd_xprt); 6208 nd->nd_xprt->xp_p2 = 6209 clp->lc_req.nr_client->cl_private; 6210 /* Disable idle timeout. */ 6211 nd->nd_xprt->xp_idletimeout = 0; 6212 sep->sess_cbsess.nfsess_xprt = nd->nd_xprt; 6213 if (savxprt != NULL) 6214 SVC_RELEASE(savxprt); 6215 sep->sess_crflags |= NFSV4CRSESS_CONNBACKCHAN; 6216 clp->lc_flags |= LCL_DONEBINDCONN; 6217 if (*foreaftp == NFSCDFS4_BACK) 6218 *foreaftp = NFSCDFS4_BACK; 6219 else 6220 *foreaftp = NFSCDFS4_BOTH; 6221 } else if (*foreaftp != NFSCDFC4_BACK) { 6222 NFSD_DEBUG(2, "nfsrv_bindconnsess: can't set " 6223 "up backchannel\n"); 6224 sep->sess_crflags &= ~NFSV4CRSESS_CONNBACKCHAN; 6225 clp->lc_flags |= LCL_DONEBINDCONN; 6226 *foreaftp = NFSCDFS4_FORE; 6227 } else { 6228 error = NFSERR_NOTSUPP; 6229 printf("nfsrv_bindconnsess: Can't add " 6230 "backchannel\n"); 6231 } 6232 } else { 6233 NFSD_DEBUG(2, "nfsrv_bindconnsess: Set forechannel\n"); 6234 clp->lc_flags |= LCL_DONEBINDCONN; 6235 *foreaftp = NFSCDFS4_FORE; 6236 } 6237 } else 6238 error = NFSERR_BADSESSION; 6239 NFSUNLOCKSESSION(shp); 6240 NFSUNLOCKSTATE(); 6241 return (error); 6242 } 6243 6244 /* 6245 * Free up a session structure. 6246 */ 6247 static int 6248 nfsrv_freesession(struct nfsdsession *sep, uint8_t *sessionid) 6249 { 6250 struct nfssessionhash *shp; 6251 int i; 6252 6253 NFSLOCKSTATE(); 6254 if (sep == NULL) { 6255 shp = NFSSESSIONHASH(sessionid); 6256 NFSLOCKSESSION(shp); 6257 sep = nfsrv_findsession(sessionid); 6258 } else { 6259 shp = NFSSESSIONHASH(sep->sess_sessionid); 6260 NFSLOCKSESSION(shp); 6261 } 6262 if (sep != NULL) { 6263 sep->sess_refcnt--; 6264 if (sep->sess_refcnt > 0) { 6265 NFSUNLOCKSESSION(shp); 6266 NFSUNLOCKSTATE(); 6267 return (NFSERR_BACKCHANBUSY); 6268 } 6269 LIST_REMOVE(sep, sess_hash); 6270 LIST_REMOVE(sep, sess_list); 6271 } 6272 NFSUNLOCKSESSION(shp); 6273 NFSUNLOCKSTATE(); 6274 if (sep == NULL) 6275 return (NFSERR_BADSESSION); 6276 for (i = 0; i < NFSV4_SLOTS; i++) 6277 if (sep->sess_slots[i].nfssl_reply != NULL) 6278 m_freem(sep->sess_slots[i].nfssl_reply); 6279 if (sep->sess_cbsess.nfsess_xprt != NULL) 6280 SVC_RELEASE(sep->sess_cbsess.nfsess_xprt); 6281 free(sep, M_NFSDSESSION); 6282 return (0); 6283 } 6284 6285 /* 6286 * Free a stateid. 6287 * RFC5661 says that it should fail when there are associated opens, locks 6288 * or delegations. Since stateids represent opens, I don't see how you can 6289 * free an open stateid (it will be free'd when closed), so this function 6290 * only works for lock stateids (freeing the lock_owner) or delegations. 6291 */ 6292 int 6293 nfsrv_freestateid(struct nfsrv_descript *nd, nfsv4stateid_t *stateidp, 6294 NFSPROC_T *p) 6295 { 6296 struct nfsclient *clp; 6297 struct nfsstate *stp; 6298 int error; 6299 6300 NFSLOCKSTATE(); 6301 /* 6302 * Look up the stateid 6303 */ 6304 error = nfsrv_getclient((nfsquad_t)((u_quad_t)0), CLOPS_RENEW, &clp, 6305 NULL, (nfsquad_t)((u_quad_t)0), 0, nd, p); 6306 if (error == 0) { 6307 /* First, check for a delegation. */ 6308 LIST_FOREACH(stp, &clp->lc_deleg, ls_list) { 6309 if (!NFSBCMP(stp->ls_stateid.other, stateidp->other, 6310 NFSX_STATEIDOTHER)) 6311 break; 6312 } 6313 if (stp != NULL) { 6314 nfsrv_freedeleg(stp); 6315 NFSUNLOCKSTATE(); 6316 return (error); 6317 } 6318 } 6319 /* Not a delegation, try for a lock_owner. */ 6320 if (error == 0) 6321 error = nfsrv_getstate(clp, stateidp, 0, &stp); 6322 if (error == 0 && ((stp->ls_flags & (NFSLCK_OPEN | NFSLCK_DELEGREAD | 6323 NFSLCK_DELEGWRITE)) != 0 || (stp->ls_flags & NFSLCK_LOCK) == 0)) 6324 /* Not a lock_owner stateid. */ 6325 error = NFSERR_LOCKSHELD; 6326 if (error == 0 && !LIST_EMPTY(&stp->ls_lock)) 6327 error = NFSERR_LOCKSHELD; 6328 if (error == 0) 6329 nfsrv_freelockowner(stp, NULL, 0, p); 6330 NFSUNLOCKSTATE(); 6331 return (error); 6332 } 6333 6334 /* 6335 * Test a stateid. 6336 */ 6337 int 6338 nfsrv_teststateid(struct nfsrv_descript *nd, nfsv4stateid_t *stateidp, 6339 NFSPROC_T *p) 6340 { 6341 struct nfsclient *clp; 6342 struct nfsstate *stp; 6343 int error; 6344 6345 NFSLOCKSTATE(); 6346 /* 6347 * Look up the stateid 6348 */ 6349 error = nfsrv_getclient((nfsquad_t)((u_quad_t)0), CLOPS_RENEW, &clp, 6350 NULL, (nfsquad_t)((u_quad_t)0), 0, nd, p); 6351 if (error == 0) 6352 error = nfsrv_getstate(clp, stateidp, 0, &stp); 6353 if (error == 0 && stateidp->seqid != 0 && 6354 SEQ_LT(stateidp->seqid, stp->ls_stateid.seqid)) 6355 error = NFSERR_OLDSTATEID; 6356 NFSUNLOCKSTATE(); 6357 return (error); 6358 } 6359 6360 /* 6361 * Generate the xdr for an NFSv4.1 CBSequence Operation. 6362 */ 6363 static int 6364 nfsv4_setcbsequence(struct nfsrv_descript *nd, struct nfsclient *clp, 6365 int dont_replycache, struct nfsdsession **sepp) 6366 { 6367 struct nfsdsession *sep; 6368 uint32_t *tl, slotseq = 0; 6369 int maxslot, slotpos; 6370 uint8_t sessionid[NFSX_V4SESSIONID]; 6371 int error; 6372 6373 error = nfsv4_getcbsession(clp, sepp); 6374 if (error != 0) 6375 return (error); 6376 sep = *sepp; 6377 (void)nfsv4_sequencelookup(NULL, &sep->sess_cbsess, &slotpos, &maxslot, 6378 &slotseq, sessionid); 6379 KASSERT(maxslot >= 0, ("nfsv4_setcbsequence neg maxslot")); 6380 6381 /* Build the Sequence arguments. */ 6382 NFSM_BUILD(tl, uint32_t *, NFSX_V4SESSIONID + 5 * NFSX_UNSIGNED); 6383 bcopy(sessionid, tl, NFSX_V4SESSIONID); 6384 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED; 6385 nd->nd_slotseq = tl; 6386 *tl++ = txdr_unsigned(slotseq); 6387 *tl++ = txdr_unsigned(slotpos); 6388 *tl++ = txdr_unsigned(maxslot); 6389 if (dont_replycache == 0) 6390 *tl++ = newnfs_true; 6391 else 6392 *tl++ = newnfs_false; 6393 *tl = 0; /* No referring call list, for now. */ 6394 nd->nd_flag |= ND_HASSEQUENCE; 6395 return (0); 6396 } 6397 6398 /* 6399 * Get a session for the callback. 6400 */ 6401 static int 6402 nfsv4_getcbsession(struct nfsclient *clp, struct nfsdsession **sepp) 6403 { 6404 struct nfsdsession *sep; 6405 6406 NFSLOCKSTATE(); 6407 LIST_FOREACH(sep, &clp->lc_session, sess_list) { 6408 if ((sep->sess_crflags & NFSV4CRSESS_CONNBACKCHAN) != 0) 6409 break; 6410 } 6411 if (sep == NULL) { 6412 NFSUNLOCKSTATE(); 6413 return (NFSERR_BADSESSION); 6414 } 6415 sep->sess_refcnt++; 6416 *sepp = sep; 6417 NFSUNLOCKSTATE(); 6418 return (0); 6419 } 6420 6421 /* 6422 * Free up all backchannel xprts. This needs to be done when the nfsd threads 6423 * exit, since those transports will all be going away. 6424 * This is only called after all the nfsd threads are done performing RPCs, 6425 * so locking shouldn't be an issue. 6426 */ 6427 APPLESTATIC void 6428 nfsrv_freeallbackchannel_xprts(void) 6429 { 6430 struct nfsdsession *sep; 6431 struct nfsclient *clp; 6432 SVCXPRT *xprt; 6433 int i; 6434 6435 for (i = 0; i < nfsrv_clienthashsize; i++) { 6436 LIST_FOREACH(clp, &nfsclienthash[i], lc_hash) { 6437 LIST_FOREACH(sep, &clp->lc_session, sess_list) { 6438 xprt = sep->sess_cbsess.nfsess_xprt; 6439 sep->sess_cbsess.nfsess_xprt = NULL; 6440 if (xprt != NULL) 6441 SVC_RELEASE(xprt); 6442 } 6443 } 6444 } 6445 } 6446 6447 /* 6448 * Do a layout commit. Actually just call nfsrv_updatemdsattr(). 6449 * I have no idea if the rest of these arguments will ever be useful? 6450 */ 6451 int 6452 nfsrv_layoutcommit(struct nfsrv_descript *nd, vnode_t vp, int layouttype, 6453 int hasnewoff, uint64_t newoff, uint64_t offset, uint64_t len, 6454 int hasnewmtime, struct timespec *newmtimep, int reclaim, 6455 nfsv4stateid_t *stateidp, int maxcnt, char *layp, int *hasnewsizep, 6456 uint64_t *newsizep, struct ucred *cred, NFSPROC_T *p) 6457 { 6458 struct nfsvattr na; 6459 int error; 6460 6461 error = nfsrv_updatemdsattr(vp, &na, p); 6462 if (error == 0) { 6463 *hasnewsizep = 1; 6464 *newsizep = na.na_size; 6465 } 6466 return (error); 6467 } 6468 6469 /* 6470 * Try and get a layout. 6471 */ 6472 int 6473 nfsrv_layoutget(struct nfsrv_descript *nd, vnode_t vp, struct nfsexstuff *exp, 6474 int layouttype, int *iomode, uint64_t *offset, uint64_t *len, 6475 uint64_t minlen, nfsv4stateid_t *stateidp, int maxcnt, int *retonclose, 6476 int *layoutlenp, char *layp, struct ucred *cred, NFSPROC_T *p) 6477 { 6478 struct nfslayouthash *lhyp; 6479 struct nfslayout *lyp; 6480 char *devid; 6481 fhandle_t fh, *dsfhp; 6482 int error, mirrorcnt; 6483 6484 if (nfsrv_devidcnt == 0) 6485 return (NFSERR_UNKNLAYOUTTYPE); 6486 6487 if (*offset != 0) 6488 printf("nfsrv_layoutget: off=%ju len=%ju\n", (uintmax_t)*offset, 6489 (uintmax_t)*len); 6490 error = nfsvno_getfh(vp, &fh, p); 6491 NFSD_DEBUG(4, "layoutget getfh=%d\n", error); 6492 if (error != 0) 6493 return (error); 6494 6495 /* 6496 * For now, all layouts are for entire files. 6497 * Only issue Read/Write layouts if requested for a non-readonly fs. 6498 */ 6499 if (NFSVNO_EXRDONLY(exp)) { 6500 if (*iomode == NFSLAYOUTIOMODE_RW) 6501 return (NFSERR_LAYOUTTRYLATER); 6502 *iomode = NFSLAYOUTIOMODE_READ; 6503 } 6504 if (*iomode != NFSLAYOUTIOMODE_RW) 6505 *iomode = NFSLAYOUTIOMODE_READ; 6506 6507 /* 6508 * Check to see if a write layout can be issued for this file. 6509 * This is used during mirror recovery to avoid RW layouts being 6510 * issued for a file while it is being copied to the recovered 6511 * mirror. 6512 */ 6513 if (*iomode == NFSLAYOUTIOMODE_RW && nfsrv_dontlayout(&fh) != 0) 6514 return (NFSERR_LAYOUTTRYLATER); 6515 6516 *retonclose = 0; 6517 *offset = 0; 6518 *len = UINT64_MAX; 6519 6520 /* First, see if a layout already exists and return if found. */ 6521 lhyp = NFSLAYOUTHASH(&fh); 6522 NFSLOCKLAYOUT(lhyp); 6523 error = nfsrv_findlayout(&nd->nd_clientid, &fh, layouttype, p, &lyp); 6524 NFSD_DEBUG(4, "layoutget findlay=%d\n", error); 6525 /* 6526 * Not sure if the seqid must be the same, so I won't check it. 6527 */ 6528 if (error == 0 && (stateidp->other[0] != lyp->lay_stateid.other[0] || 6529 stateidp->other[1] != lyp->lay_stateid.other[1] || 6530 stateidp->other[2] != lyp->lay_stateid.other[2])) { 6531 if ((lyp->lay_flags & NFSLAY_CALLB) == 0) { 6532 NFSUNLOCKLAYOUT(lhyp); 6533 NFSD_DEBUG(1, "ret bad stateid\n"); 6534 return (NFSERR_BADSTATEID); 6535 } 6536 /* 6537 * I believe we get here because there is a race between 6538 * the client processing the CBLAYOUTRECALL and the layout 6539 * being deleted here on the server. 6540 * The client has now done a LayoutGet with a non-layout 6541 * stateid, as it would when there is no layout. 6542 * As such, free this layout and set error == NFSERR_BADSTATEID 6543 * so the code below will create a new layout structure as 6544 * would happen if no layout was found. 6545 * "lyp" will be set before being used below, but set it NULL 6546 * as a safety belt. 6547 */ 6548 nfsrv_freelayout(&lhyp->list, lyp); 6549 lyp = NULL; 6550 error = NFSERR_BADSTATEID; 6551 } 6552 if (error == 0) { 6553 if (lyp->lay_layoutlen > maxcnt) { 6554 NFSUNLOCKLAYOUT(lhyp); 6555 NFSD_DEBUG(1, "ret layout too small\n"); 6556 return (NFSERR_TOOSMALL); 6557 } 6558 if (*iomode == NFSLAYOUTIOMODE_RW) 6559 lyp->lay_flags |= NFSLAY_RW; 6560 else 6561 lyp->lay_flags |= NFSLAY_READ; 6562 NFSBCOPY(lyp->lay_xdr, layp, lyp->lay_layoutlen); 6563 *layoutlenp = lyp->lay_layoutlen; 6564 if (++lyp->lay_stateid.seqid == 0) 6565 lyp->lay_stateid.seqid = 1; 6566 stateidp->seqid = lyp->lay_stateid.seqid; 6567 NFSUNLOCKLAYOUT(lhyp); 6568 NFSD_DEBUG(4, "ret fnd layout\n"); 6569 return (0); 6570 } 6571 NFSUNLOCKLAYOUT(lhyp); 6572 6573 /* Find the device id and file handle. */ 6574 dsfhp = malloc(sizeof(fhandle_t) * NFSDEV_MAXMIRRORS, M_TEMP, M_WAITOK); 6575 devid = malloc(NFSX_V4DEVICEID * NFSDEV_MAXMIRRORS, M_TEMP, M_WAITOK); 6576 error = nfsrv_dsgetdevandfh(vp, p, &mirrorcnt, dsfhp, devid); 6577 NFSD_DEBUG(4, "layoutget devandfh=%d\n", error); 6578 if (error == 0) { 6579 if (layouttype == NFSLAYOUT_NFSV4_1_FILES) { 6580 if (NFSX_V4FILELAYOUT > maxcnt) 6581 error = NFSERR_TOOSMALL; 6582 else 6583 lyp = nfsrv_filelayout(nd, *iomode, &fh, dsfhp, 6584 devid, vp->v_mount->mnt_stat.f_fsid); 6585 } else { 6586 if (NFSX_V4FLEXLAYOUT(mirrorcnt) > maxcnt) 6587 error = NFSERR_TOOSMALL; 6588 else 6589 lyp = nfsrv_flexlayout(nd, *iomode, mirrorcnt, 6590 &fh, dsfhp, devid, 6591 vp->v_mount->mnt_stat.f_fsid); 6592 } 6593 } 6594 free(dsfhp, M_TEMP); 6595 free(devid, M_TEMP); 6596 if (error != 0) 6597 return (error); 6598 6599 /* 6600 * Now, add this layout to the list. 6601 */ 6602 error = nfsrv_addlayout(nd, &lyp, stateidp, layp, layoutlenp, p); 6603 NFSD_DEBUG(4, "layoutget addl=%d\n", error); 6604 /* 6605 * The lyp will be set to NULL by nfsrv_addlayout() if it 6606 * linked the new structure into the lists. 6607 */ 6608 free(lyp, M_NFSDSTATE); 6609 return (error); 6610 } 6611 6612 /* 6613 * Generate a File Layout. 6614 */ 6615 static struct nfslayout * 6616 nfsrv_filelayout(struct nfsrv_descript *nd, int iomode, fhandle_t *fhp, 6617 fhandle_t *dsfhp, char *devid, fsid_t fs) 6618 { 6619 uint32_t *tl; 6620 struct nfslayout *lyp; 6621 uint64_t pattern_offset; 6622 6623 lyp = malloc(sizeof(struct nfslayout) + NFSX_V4FILELAYOUT, M_NFSDSTATE, 6624 M_WAITOK | M_ZERO); 6625 lyp->lay_type = NFSLAYOUT_NFSV4_1_FILES; 6626 if (iomode == NFSLAYOUTIOMODE_RW) 6627 lyp->lay_flags = NFSLAY_RW; 6628 else 6629 lyp->lay_flags = NFSLAY_READ; 6630 NFSBCOPY(fhp, &lyp->lay_fh, sizeof(*fhp)); 6631 lyp->lay_clientid.qval = nd->nd_clientid.qval; 6632 lyp->lay_fsid = fs; 6633 6634 /* Fill in the xdr for the files layout. */ 6635 tl = (uint32_t *)lyp->lay_xdr; 6636 NFSBCOPY(devid, tl, NFSX_V4DEVICEID); /* Device ID. */ 6637 tl += (NFSX_V4DEVICEID / NFSX_UNSIGNED); 6638 6639 /* 6640 * Make the stripe size as many 64K blocks as will fit in the stripe 6641 * mask. Since there is only one stripe, the stripe size doesn't really 6642 * matter, except that the Linux client will only handle an exact 6643 * multiple of their PAGE_SIZE (usually 4K). I chose 64K as a value 6644 * that should cover most/all arches w.r.t. PAGE_SIZE. 6645 */ 6646 *tl++ = txdr_unsigned(NFSFLAYUTIL_STRIPE_MASK & ~0xffff); 6647 *tl++ = 0; /* 1st stripe index. */ 6648 pattern_offset = 0; 6649 txdr_hyper(pattern_offset, tl); tl += 2; /* Pattern offset. */ 6650 *tl++ = txdr_unsigned(1); /* 1 file handle. */ 6651 *tl++ = txdr_unsigned(NFSX_V4PNFSFH); 6652 NFSBCOPY(dsfhp, tl, sizeof(*dsfhp)); 6653 lyp->lay_layoutlen = NFSX_V4FILELAYOUT; 6654 return (lyp); 6655 } 6656 6657 #define FLEX_OWNERID "999" 6658 #define FLEX_UID0 "0" 6659 /* 6660 * Generate a Flex File Layout. 6661 * The FLEX_OWNERID can be any string of 3 decimal digits. Although this 6662 * string goes on the wire, it isn't supposed to be used by the client, 6663 * since this server uses tight coupling. 6664 * Although not recommended by the spec., if vfs.nfsd.flexlinuxhack=1 use 6665 * a string of "0". This works around the Linux Flex File Layout driver bug 6666 * which uses the synthetic uid/gid strings for the "tightly coupled" case. 6667 */ 6668 static struct nfslayout * 6669 nfsrv_flexlayout(struct nfsrv_descript *nd, int iomode, int mirrorcnt, 6670 fhandle_t *fhp, fhandle_t *dsfhp, char *devid, fsid_t fs) 6671 { 6672 uint32_t *tl; 6673 struct nfslayout *lyp; 6674 uint64_t lenval; 6675 int i; 6676 6677 lyp = malloc(sizeof(struct nfslayout) + NFSX_V4FLEXLAYOUT(mirrorcnt), 6678 M_NFSDSTATE, M_WAITOK | M_ZERO); 6679 lyp->lay_type = NFSLAYOUT_FLEXFILE; 6680 if (iomode == NFSLAYOUTIOMODE_RW) 6681 lyp->lay_flags = NFSLAY_RW; 6682 else 6683 lyp->lay_flags = NFSLAY_READ; 6684 NFSBCOPY(fhp, &lyp->lay_fh, sizeof(*fhp)); 6685 lyp->lay_clientid.qval = nd->nd_clientid.qval; 6686 lyp->lay_fsid = fs; 6687 lyp->lay_mirrorcnt = mirrorcnt; 6688 6689 /* Fill in the xdr for the files layout. */ 6690 tl = (uint32_t *)lyp->lay_xdr; 6691 lenval = 0; 6692 txdr_hyper(lenval, tl); tl += 2; /* Stripe unit. */ 6693 *tl++ = txdr_unsigned(mirrorcnt); /* # of mirrors. */ 6694 for (i = 0; i < mirrorcnt; i++) { 6695 *tl++ = txdr_unsigned(1); /* One stripe. */ 6696 NFSBCOPY(devid, tl, NFSX_V4DEVICEID); /* Device ID. */ 6697 tl += (NFSX_V4DEVICEID / NFSX_UNSIGNED); 6698 devid += NFSX_V4DEVICEID; 6699 *tl++ = txdr_unsigned(1); /* Efficiency. */ 6700 *tl++ = 0; /* Proxy Stateid. */ 6701 *tl++ = 0x55555555; 6702 *tl++ = 0x55555555; 6703 *tl++ = 0x55555555; 6704 *tl++ = txdr_unsigned(1); /* 1 file handle. */ 6705 *tl++ = txdr_unsigned(NFSX_V4PNFSFH); 6706 NFSBCOPY(dsfhp, tl, sizeof(*dsfhp)); 6707 tl += (NFSM_RNDUP(NFSX_V4PNFSFH) / NFSX_UNSIGNED); 6708 dsfhp++; 6709 if (nfsrv_flexlinuxhack != 0) { 6710 *tl++ = txdr_unsigned(strlen(FLEX_UID0)); 6711 *tl = 0; /* 0 pad string. */ 6712 NFSBCOPY(FLEX_UID0, tl++, strlen(FLEX_UID0)); 6713 *tl++ = txdr_unsigned(strlen(FLEX_UID0)); 6714 *tl = 0; /* 0 pad string. */ 6715 NFSBCOPY(FLEX_UID0, tl++, strlen(FLEX_UID0)); 6716 } else { 6717 *tl++ = txdr_unsigned(strlen(FLEX_OWNERID)); 6718 NFSBCOPY(FLEX_OWNERID, tl++, NFSX_UNSIGNED); 6719 *tl++ = txdr_unsigned(strlen(FLEX_OWNERID)); 6720 NFSBCOPY(FLEX_OWNERID, tl++, NFSX_UNSIGNED); 6721 } 6722 } 6723 *tl++ = txdr_unsigned(0); /* ff_flags. */ 6724 *tl = txdr_unsigned(60); /* Status interval hint. */ 6725 lyp->lay_layoutlen = NFSX_V4FLEXLAYOUT(mirrorcnt); 6726 return (lyp); 6727 } 6728 6729 /* 6730 * Parse and process Flex File errors returned via LayoutReturn. 6731 */ 6732 static void 6733 nfsrv_flexlayouterr(struct nfsrv_descript *nd, uint32_t *layp, int maxcnt, 6734 NFSPROC_T *p) 6735 { 6736 uint32_t *tl; 6737 int cnt, errcnt, i, j, opnum, stat; 6738 char devid[NFSX_V4DEVICEID]; 6739 6740 tl = layp; 6741 cnt = fxdr_unsigned(int, *tl++); 6742 NFSD_DEBUG(4, "flexlayouterr cnt=%d\n", cnt); 6743 for (i = 0; i < cnt; i++) { 6744 /* Skip offset, length and stateid for now. */ 6745 tl += (4 + NFSX_STATEID / NFSX_UNSIGNED); 6746 errcnt = fxdr_unsigned(int, *tl++); 6747 NFSD_DEBUG(4, "flexlayouterr errcnt=%d\n", errcnt); 6748 for (j = 0; j < errcnt; j++) { 6749 NFSBCOPY(tl, devid, NFSX_V4DEVICEID); 6750 tl += (NFSX_V4DEVICEID / NFSX_UNSIGNED); 6751 stat = fxdr_unsigned(int, *tl++); 6752 opnum = fxdr_unsigned(int, *tl++); 6753 NFSD_DEBUG(4, "flexlayouterr op=%d stat=%d\n", opnum, 6754 stat); 6755 /* 6756 * Except for NFSERR_ACCES and NFSERR_STALE errors, 6757 * disable the mirror. 6758 */ 6759 if (stat != NFSERR_ACCES && stat != NFSERR_STALE) 6760 nfsrv_delds(devid, p); 6761 } 6762 } 6763 } 6764 6765 /* 6766 * This function removes all flex file layouts which has a mirror with 6767 * a device id that matches the argument. 6768 * Called when the DS represented by the device id has failed. 6769 */ 6770 void 6771 nfsrv_flexmirrordel(char *devid, NFSPROC_T *p) 6772 { 6773 uint32_t *tl; 6774 struct nfslayout *lyp, *nlyp; 6775 struct nfslayouthash *lhyp; 6776 struct nfslayouthead loclyp; 6777 int i, j; 6778 6779 NFSD_DEBUG(4, "flexmirrordel\n"); 6780 /* Move all layouts found onto a local list. */ 6781 TAILQ_INIT(&loclyp); 6782 for (i = 0; i < nfsrv_layouthashsize; i++) { 6783 lhyp = &nfslayouthash[i]; 6784 NFSLOCKLAYOUT(lhyp); 6785 TAILQ_FOREACH_SAFE(lyp, &lhyp->list, lay_list, nlyp) { 6786 if (lyp->lay_type == NFSLAYOUT_FLEXFILE && 6787 lyp->lay_mirrorcnt > 1) { 6788 NFSD_DEBUG(4, "possible match\n"); 6789 tl = lyp->lay_xdr; 6790 tl += 3; 6791 for (j = 0; j < lyp->lay_mirrorcnt; j++) { 6792 tl++; 6793 if (NFSBCMP(devid, tl, NFSX_V4DEVICEID) 6794 == 0) { 6795 /* Found one. */ 6796 NFSD_DEBUG(4, "fnd one\n"); 6797 TAILQ_REMOVE(&lhyp->list, lyp, 6798 lay_list); 6799 TAILQ_INSERT_HEAD(&loclyp, lyp, 6800 lay_list); 6801 break; 6802 } 6803 tl += (NFSX_V4DEVICEID / NFSX_UNSIGNED + 6804 NFSM_RNDUP(NFSX_V4PNFSFH) / 6805 NFSX_UNSIGNED + 11 * NFSX_UNSIGNED); 6806 } 6807 } 6808 } 6809 NFSUNLOCKLAYOUT(lhyp); 6810 } 6811 6812 /* Now, try to do a Layout recall for each one found. */ 6813 TAILQ_FOREACH_SAFE(lyp, &loclyp, lay_list, nlyp) { 6814 NFSD_DEBUG(4, "do layout recall\n"); 6815 /* 6816 * The layout stateid.seqid needs to be incremented 6817 * before doing a LAYOUT_RECALL callback. 6818 * Set lay_trycnt to UINT16_MAX so it won't set up a retry. 6819 */ 6820 if (++lyp->lay_stateid.seqid == 0) 6821 lyp->lay_stateid.seqid = 1; 6822 lyp->lay_trycnt = UINT16_MAX; 6823 nfsrv_recalllayout(lyp->lay_clientid, &lyp->lay_stateid, 6824 &lyp->lay_fh, lyp, &loclyp, lyp->lay_type, p); 6825 nfsrv_freelayout(&loclyp, lyp); 6826 } 6827 } 6828 6829 /* 6830 * Do a recall callback to the client for this layout. 6831 */ 6832 static int 6833 nfsrv_recalllayout(nfsquad_t clid, nfsv4stateid_t *stateidp, fhandle_t *fhp, 6834 struct nfslayout *lyp, struct nfslayouthead *lyheadp, int laytype, 6835 NFSPROC_T *p) 6836 { 6837 struct nfsclient *clp; 6838 int error; 6839 6840 NFSD_DEBUG(4, "nfsrv_recalllayout\n"); 6841 error = nfsrv_getclient(clid, 0, &clp, NULL, (nfsquad_t)((u_quad_t)0), 6842 0, NULL, p); 6843 NFSD_DEBUG(4, "aft nfsrv_getclient=%d\n", error); 6844 if (error != 0) 6845 return (error); 6846 if ((clp->lc_flags & LCL_NFSV41) != 0) { 6847 error = nfsrv_docallback(clp, NFSV4OP_CBLAYOUTRECALL, 6848 stateidp, 0, fhp, NULL, NULL, laytype, p); 6849 /* If lyp != NULL, handle an error return here. */ 6850 if (error != 0 && lyp != NULL) { 6851 NFSDRECALLLOCK(); 6852 if (error == NFSERR_NOMATCHLAYOUT) { 6853 /* 6854 * Mark it returned, since there is no layout. 6855 */ 6856 if ((lyp->lay_flags & NFSLAY_RECALL) != 0) { 6857 lyp->lay_flags |= NFSLAY_RETURNED; 6858 wakeup(lyp); 6859 } 6860 NFSDRECALLUNLOCK(); 6861 } else if ((lyp->lay_flags & NFSLAY_RETURNED) == 0 && 6862 lyp->lay_trycnt < 10) { 6863 /* 6864 * Clear recall, so it can be tried again 6865 * and put it at the end of the list to 6866 * delay the retry a little longer. 6867 */ 6868 lyp->lay_flags &= ~NFSLAY_RECALL; 6869 lyp->lay_trycnt++; 6870 TAILQ_REMOVE(lyheadp, lyp, lay_list); 6871 TAILQ_INSERT_TAIL(lyheadp, lyp, lay_list); 6872 NFSDRECALLUNLOCK(); 6873 nfs_catnap(PVFS, 0, "nfsrclay"); 6874 } else 6875 NFSDRECALLUNLOCK(); 6876 } 6877 } else 6878 printf("nfsrv_recalllayout: clp not NFSv4.1\n"); 6879 return (error); 6880 } 6881 6882 /* 6883 * Find a layout to recall when we exceed our high water mark. 6884 */ 6885 void 6886 nfsrv_recalloldlayout(NFSPROC_T *p) 6887 { 6888 struct nfslayouthash *lhyp; 6889 struct nfslayout *lyp; 6890 nfsquad_t clientid; 6891 nfsv4stateid_t stateid; 6892 fhandle_t fh; 6893 int error, laytype, ret; 6894 6895 lhyp = &nfslayouthash[arc4random() % nfsrv_layouthashsize]; 6896 NFSLOCKLAYOUT(lhyp); 6897 TAILQ_FOREACH_REVERSE(lyp, &lhyp->list, nfslayouthead, lay_list) { 6898 if ((lyp->lay_flags & NFSLAY_CALLB) == 0) { 6899 lyp->lay_flags |= NFSLAY_CALLB; 6900 /* 6901 * The layout stateid.seqid needs to be incremented 6902 * before doing a LAYOUT_RECALL callback. 6903 */ 6904 if (++lyp->lay_stateid.seqid == 0) 6905 lyp->lay_stateid.seqid = 1; 6906 clientid = lyp->lay_clientid; 6907 stateid = lyp->lay_stateid; 6908 fh = lyp->lay_fh; 6909 laytype = lyp->lay_type; 6910 break; 6911 } 6912 } 6913 NFSUNLOCKLAYOUT(lhyp); 6914 if (lyp != NULL) { 6915 error = nfsrv_recalllayout(clientid, &stateid, &fh, NULL, NULL, 6916 laytype, p); 6917 if (error != 0 && error != NFSERR_NOMATCHLAYOUT) 6918 printf("recallold=%d\n", error); 6919 if (error != 0) { 6920 NFSLOCKLAYOUT(lhyp); 6921 /* 6922 * Since the hash list was unlocked, we need to 6923 * find it again. 6924 */ 6925 ret = nfsrv_findlayout(&clientid, &fh, laytype, p, 6926 &lyp); 6927 if (ret == 0 && 6928 (lyp->lay_flags & NFSLAY_CALLB) != 0 && 6929 lyp->lay_stateid.other[0] == stateid.other[0] && 6930 lyp->lay_stateid.other[1] == stateid.other[1] && 6931 lyp->lay_stateid.other[2] == stateid.other[2]) { 6932 /* 6933 * The client no longer knows this layout, so 6934 * it can be free'd now. 6935 */ 6936 if (error == NFSERR_NOMATCHLAYOUT) 6937 nfsrv_freelayout(&lhyp->list, lyp); 6938 else { 6939 /* 6940 * Leave it to be tried later by 6941 * clearing NFSLAY_CALLB and moving 6942 * it to the head of the list, so it 6943 * won't be tried again for a while. 6944 */ 6945 lyp->lay_flags &= ~NFSLAY_CALLB; 6946 TAILQ_REMOVE(&lhyp->list, lyp, 6947 lay_list); 6948 TAILQ_INSERT_HEAD(&lhyp->list, lyp, 6949 lay_list); 6950 } 6951 } 6952 NFSUNLOCKLAYOUT(lhyp); 6953 } 6954 } 6955 } 6956 6957 /* 6958 * Try and return layout(s). 6959 */ 6960 int 6961 nfsrv_layoutreturn(struct nfsrv_descript *nd, vnode_t vp, 6962 int layouttype, int iomode, uint64_t offset, uint64_t len, int reclaim, 6963 int kind, nfsv4stateid_t *stateidp, int maxcnt, uint32_t *layp, int *fndp, 6964 struct ucred *cred, NFSPROC_T *p) 6965 { 6966 struct nfsvattr na; 6967 struct nfslayouthash *lhyp; 6968 struct nfslayout *lyp; 6969 fhandle_t fh; 6970 int error = 0; 6971 6972 *fndp = 0; 6973 if (kind == NFSV4LAYOUTRET_FILE) { 6974 error = nfsvno_getfh(vp, &fh, p); 6975 if (error == 0) { 6976 error = nfsrv_updatemdsattr(vp, &na, p); 6977 if (error != 0) 6978 printf("nfsrv_layoutreturn: updatemdsattr" 6979 " failed=%d\n", error); 6980 } 6981 if (error == 0) { 6982 if (reclaim == newnfs_true) { 6983 error = nfsrv_checkgrace(NULL, NULL, 6984 NFSLCK_RECLAIM); 6985 if (error != NFSERR_NOGRACE) 6986 error = 0; 6987 return (error); 6988 } 6989 lhyp = NFSLAYOUTHASH(&fh); 6990 NFSDRECALLLOCK(); 6991 NFSLOCKLAYOUT(lhyp); 6992 error = nfsrv_findlayout(&nd->nd_clientid, &fh, 6993 layouttype, p, &lyp); 6994 NFSD_DEBUG(4, "layoutret findlay=%d\n", error); 6995 if (error == 0 && 6996 stateidp->other[0] == lyp->lay_stateid.other[0] && 6997 stateidp->other[1] == lyp->lay_stateid.other[1] && 6998 stateidp->other[2] == lyp->lay_stateid.other[2]) { 6999 NFSD_DEBUG(4, "nfsrv_layoutreturn: stateid %d" 7000 " %x %x %x laystateid %d %x %x %x" 7001 " off=%ju len=%ju flgs=0x%x\n", 7002 stateidp->seqid, stateidp->other[0], 7003 stateidp->other[1], stateidp->other[2], 7004 lyp->lay_stateid.seqid, 7005 lyp->lay_stateid.other[0], 7006 lyp->lay_stateid.other[1], 7007 lyp->lay_stateid.other[2], 7008 (uintmax_t)offset, (uintmax_t)len, 7009 lyp->lay_flags); 7010 if (++lyp->lay_stateid.seqid == 0) 7011 lyp->lay_stateid.seqid = 1; 7012 stateidp->seqid = lyp->lay_stateid.seqid; 7013 if (offset == 0 && len == UINT64_MAX) { 7014 if ((iomode & NFSLAYOUTIOMODE_READ) != 7015 0) 7016 lyp->lay_flags &= ~NFSLAY_READ; 7017 if ((iomode & NFSLAYOUTIOMODE_RW) != 0) 7018 lyp->lay_flags &= ~NFSLAY_RW; 7019 if ((lyp->lay_flags & (NFSLAY_READ | 7020 NFSLAY_RW)) == 0) 7021 nfsrv_freelayout(&lhyp->list, 7022 lyp); 7023 else 7024 *fndp = 1; 7025 } else 7026 *fndp = 1; 7027 } 7028 NFSUNLOCKLAYOUT(lhyp); 7029 /* Search the nfsrv_recalllist for a match. */ 7030 TAILQ_FOREACH(lyp, &nfsrv_recalllisthead, lay_list) { 7031 if (NFSBCMP(&lyp->lay_fh, &fh, 7032 sizeof(fh)) == 0 && 7033 lyp->lay_clientid.qval == 7034 nd->nd_clientid.qval && 7035 stateidp->other[0] == 7036 lyp->lay_stateid.other[0] && 7037 stateidp->other[1] == 7038 lyp->lay_stateid.other[1] && 7039 stateidp->other[2] == 7040 lyp->lay_stateid.other[2]) { 7041 lyp->lay_flags |= NFSLAY_RETURNED; 7042 wakeup(lyp); 7043 error = 0; 7044 } 7045 } 7046 NFSDRECALLUNLOCK(); 7047 } 7048 if (layouttype == NFSLAYOUT_FLEXFILE) 7049 nfsrv_flexlayouterr(nd, layp, maxcnt, p); 7050 } else if (kind == NFSV4LAYOUTRET_FSID) 7051 nfsrv_freelayouts(&nd->nd_clientid, 7052 &vp->v_mount->mnt_stat.f_fsid, layouttype, iomode); 7053 else if (kind == NFSV4LAYOUTRET_ALL) 7054 nfsrv_freelayouts(&nd->nd_clientid, NULL, layouttype, iomode); 7055 else 7056 error = NFSERR_INVAL; 7057 if (error == -1) 7058 error = 0; 7059 return (error); 7060 } 7061 7062 /* 7063 * Look for an existing layout. 7064 */ 7065 static int 7066 nfsrv_findlayout(nfsquad_t *clientidp, fhandle_t *fhp, int laytype, 7067 NFSPROC_T *p, struct nfslayout **lypp) 7068 { 7069 struct nfslayouthash *lhyp; 7070 struct nfslayout *lyp; 7071 int ret; 7072 7073 *lypp = NULL; 7074 ret = 0; 7075 lhyp = NFSLAYOUTHASH(fhp); 7076 TAILQ_FOREACH(lyp, &lhyp->list, lay_list) { 7077 if (NFSBCMP(&lyp->lay_fh, fhp, sizeof(*fhp)) == 0 && 7078 lyp->lay_clientid.qval == clientidp->qval && 7079 lyp->lay_type == laytype) 7080 break; 7081 } 7082 if (lyp != NULL) 7083 *lypp = lyp; 7084 else 7085 ret = -1; 7086 return (ret); 7087 } 7088 7089 /* 7090 * Add the new layout, as required. 7091 */ 7092 static int 7093 nfsrv_addlayout(struct nfsrv_descript *nd, struct nfslayout **lypp, 7094 nfsv4stateid_t *stateidp, char *layp, int *layoutlenp, NFSPROC_T *p) 7095 { 7096 struct nfsclient *clp; 7097 struct nfslayouthash *lhyp; 7098 struct nfslayout *lyp, *nlyp; 7099 fhandle_t *fhp; 7100 int error; 7101 7102 KASSERT((nd->nd_flag & ND_IMPLIEDCLID) != 0, 7103 ("nfsrv_layoutget: no nd_clientid\n")); 7104 lyp = *lypp; 7105 fhp = &lyp->lay_fh; 7106 NFSLOCKSTATE(); 7107 error = nfsrv_getclient((nfsquad_t)((u_quad_t)0), CLOPS_RENEW, &clp, 7108 NULL, (nfsquad_t)((u_quad_t)0), 0, nd, p); 7109 if (error != 0) { 7110 NFSUNLOCKSTATE(); 7111 return (error); 7112 } 7113 lyp->lay_stateid.seqid = stateidp->seqid = 1; 7114 lyp->lay_stateid.other[0] = stateidp->other[0] = 7115 clp->lc_clientid.lval[0]; 7116 lyp->lay_stateid.other[1] = stateidp->other[1] = 7117 clp->lc_clientid.lval[1]; 7118 lyp->lay_stateid.other[2] = stateidp->other[2] = 7119 nfsrv_nextstateindex(clp); 7120 NFSUNLOCKSTATE(); 7121 7122 lhyp = NFSLAYOUTHASH(fhp); 7123 NFSLOCKLAYOUT(lhyp); 7124 TAILQ_FOREACH(nlyp, &lhyp->list, lay_list) { 7125 if (NFSBCMP(&nlyp->lay_fh, fhp, sizeof(*fhp)) == 0 && 7126 nlyp->lay_clientid.qval == nd->nd_clientid.qval) 7127 break; 7128 } 7129 if (nlyp != NULL) { 7130 /* A layout already exists, so use it. */ 7131 nlyp->lay_flags |= (lyp->lay_flags & (NFSLAY_READ | NFSLAY_RW)); 7132 NFSBCOPY(nlyp->lay_xdr, layp, nlyp->lay_layoutlen); 7133 *layoutlenp = nlyp->lay_layoutlen; 7134 if (++nlyp->lay_stateid.seqid == 0) 7135 nlyp->lay_stateid.seqid = 1; 7136 stateidp->seqid = nlyp->lay_stateid.seqid; 7137 stateidp->other[0] = nlyp->lay_stateid.other[0]; 7138 stateidp->other[1] = nlyp->lay_stateid.other[1]; 7139 stateidp->other[2] = nlyp->lay_stateid.other[2]; 7140 NFSUNLOCKLAYOUT(lhyp); 7141 return (0); 7142 } 7143 7144 /* Insert the new layout in the lists. */ 7145 *lypp = NULL; 7146 atomic_add_int(&nfsrv_layoutcnt, 1); 7147 NFSBCOPY(lyp->lay_xdr, layp, lyp->lay_layoutlen); 7148 *layoutlenp = lyp->lay_layoutlen; 7149 TAILQ_INSERT_HEAD(&lhyp->list, lyp, lay_list); 7150 NFSUNLOCKLAYOUT(lhyp); 7151 return (0); 7152 } 7153 7154 /* 7155 * Get the devinfo for a deviceid. 7156 */ 7157 int 7158 nfsrv_getdevinfo(char *devid, int layouttype, uint32_t *maxcnt, 7159 uint32_t *notify, int *devaddrlen, char **devaddr) 7160 { 7161 struct nfsdevice *ds; 7162 7163 if ((layouttype != NFSLAYOUT_NFSV4_1_FILES && layouttype != 7164 NFSLAYOUT_FLEXFILE) || 7165 (nfsrv_maxpnfsmirror > 1 && layouttype == NFSLAYOUT_NFSV4_1_FILES)) 7166 return (NFSERR_UNKNLAYOUTTYPE); 7167 7168 /* 7169 * Now, search for the device id. Note that the structures won't go 7170 * away, but the order changes in the list. As such, the lock only 7171 * needs to be held during the search through the list. 7172 */ 7173 NFSDDSLOCK(); 7174 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 7175 if (NFSBCMP(devid, ds->nfsdev_deviceid, NFSX_V4DEVICEID) == 0 && 7176 ds->nfsdev_nmp != NULL) 7177 break; 7178 } 7179 NFSDDSUNLOCK(); 7180 if (ds == NULL) 7181 return (NFSERR_NOENT); 7182 7183 /* If the correct nfsdev_XXXXaddrlen is > 0, we have the device info. */ 7184 *devaddrlen = 0; 7185 if (layouttype == NFSLAYOUT_NFSV4_1_FILES) { 7186 *devaddrlen = ds->nfsdev_fileaddrlen; 7187 *devaddr = ds->nfsdev_fileaddr; 7188 } else if (layouttype == NFSLAYOUT_FLEXFILE) { 7189 *devaddrlen = ds->nfsdev_flexaddrlen; 7190 *devaddr = ds->nfsdev_flexaddr; 7191 } 7192 if (*devaddrlen == 0) 7193 return (NFSERR_UNKNLAYOUTTYPE); 7194 7195 /* 7196 * The XDR overhead is 3 unsigned values: layout_type, 7197 * length_of_address and notify bitmap. 7198 * If the notify array is changed to not all zeros, the 7199 * count of unsigned values must be increased. 7200 */ 7201 if (*maxcnt > 0 && *maxcnt < NFSM_RNDUP(*devaddrlen) + 7202 3 * NFSX_UNSIGNED) { 7203 *maxcnt = NFSM_RNDUP(*devaddrlen) + 3 * NFSX_UNSIGNED; 7204 return (NFSERR_TOOSMALL); 7205 } 7206 return (0); 7207 } 7208 7209 /* 7210 * Free a list of layout state structures. 7211 */ 7212 static void 7213 nfsrv_freelayoutlist(nfsquad_t clientid) 7214 { 7215 struct nfslayouthash *lhyp; 7216 struct nfslayout *lyp, *nlyp; 7217 int i; 7218 7219 for (i = 0; i < nfsrv_layouthashsize; i++) { 7220 lhyp = &nfslayouthash[i]; 7221 NFSLOCKLAYOUT(lhyp); 7222 TAILQ_FOREACH_SAFE(lyp, &lhyp->list, lay_list, nlyp) { 7223 if (lyp->lay_clientid.qval == clientid.qval) 7224 nfsrv_freelayout(&lhyp->list, lyp); 7225 } 7226 NFSUNLOCKLAYOUT(lhyp); 7227 } 7228 } 7229 7230 /* 7231 * Free up a layout. 7232 */ 7233 static void 7234 nfsrv_freelayout(struct nfslayouthead *lhp, struct nfslayout *lyp) 7235 { 7236 7237 NFSD_DEBUG(4, "Freelayout=%p\n", lyp); 7238 atomic_add_int(&nfsrv_layoutcnt, -1); 7239 TAILQ_REMOVE(lhp, lyp, lay_list); 7240 free(lyp, M_NFSDSTATE); 7241 } 7242 7243 /* 7244 * Free up a device id. 7245 */ 7246 void 7247 nfsrv_freeonedevid(struct nfsdevice *ds) 7248 { 7249 int i; 7250 7251 atomic_add_int(&nfsrv_devidcnt, -1); 7252 vrele(ds->nfsdev_dvp); 7253 for (i = 0; i < nfsrv_dsdirsize; i++) 7254 if (ds->nfsdev_dsdir[i] != NULL) 7255 vrele(ds->nfsdev_dsdir[i]); 7256 free(ds->nfsdev_fileaddr, M_NFSDSTATE); 7257 free(ds->nfsdev_flexaddr, M_NFSDSTATE); 7258 free(ds->nfsdev_host, M_NFSDSTATE); 7259 free(ds, M_NFSDSTATE); 7260 } 7261 7262 /* 7263 * Free up a device id and its mirrors. 7264 */ 7265 static void 7266 nfsrv_freedevid(struct nfsdevice *ds) 7267 { 7268 7269 TAILQ_REMOVE(&nfsrv_devidhead, ds, nfsdev_list); 7270 nfsrv_freeonedevid(ds); 7271 } 7272 7273 /* 7274 * Free all layouts and device ids. 7275 * Done when the nfsd threads are shut down since there may be a new 7276 * modified device id list created when the nfsd is restarted. 7277 */ 7278 void 7279 nfsrv_freealllayoutsanddevids(void) 7280 { 7281 struct nfsdontlist *mrp, *nmrp; 7282 struct nfslayout *lyp, *nlyp; 7283 7284 /* Get rid of the deviceid structures. */ 7285 nfsrv_freealldevids(); 7286 TAILQ_INIT(&nfsrv_devidhead); 7287 nfsrv_devidcnt = 0; 7288 7289 /* Get rid of all layouts. */ 7290 nfsrv_freealllayouts(); 7291 7292 /* Get rid of any nfsdontlist entries. */ 7293 LIST_FOREACH_SAFE(mrp, &nfsrv_dontlisthead, nfsmr_list, nmrp) 7294 free(mrp, M_NFSDSTATE); 7295 LIST_INIT(&nfsrv_dontlisthead); 7296 nfsrv_dontlistlen = 0; 7297 7298 /* Free layouts in the recall list. */ 7299 TAILQ_FOREACH_SAFE(lyp, &nfsrv_recalllisthead, lay_list, nlyp) 7300 nfsrv_freelayout(&nfsrv_recalllisthead, lyp); 7301 TAILQ_INIT(&nfsrv_recalllisthead); 7302 } 7303 7304 /* 7305 * Free layouts that match the arguments. 7306 */ 7307 static void 7308 nfsrv_freelayouts(nfsquad_t *clid, fsid_t *fs, int laytype, int iomode) 7309 { 7310 struct nfslayouthash *lhyp; 7311 struct nfslayout *lyp, *nlyp; 7312 int i; 7313 7314 for (i = 0; i < nfsrv_layouthashsize; i++) { 7315 lhyp = &nfslayouthash[i]; 7316 NFSLOCKLAYOUT(lhyp); 7317 TAILQ_FOREACH_SAFE(lyp, &lhyp->list, lay_list, nlyp) { 7318 if (clid->qval != lyp->lay_clientid.qval) 7319 continue; 7320 if (fs != NULL && (fs->val[0] != lyp->lay_fsid.val[0] || 7321 fs->val[1] != lyp->lay_fsid.val[1])) 7322 continue; 7323 if (laytype != lyp->lay_type) 7324 continue; 7325 if ((iomode & NFSLAYOUTIOMODE_READ) != 0) 7326 lyp->lay_flags &= ~NFSLAY_READ; 7327 if ((iomode & NFSLAYOUTIOMODE_RW) != 0) 7328 lyp->lay_flags &= ~NFSLAY_RW; 7329 if ((lyp->lay_flags & (NFSLAY_READ | NFSLAY_RW)) == 0) 7330 nfsrv_freelayout(&lhyp->list, lyp); 7331 } 7332 NFSUNLOCKLAYOUT(lhyp); 7333 } 7334 } 7335 7336 /* 7337 * Free all layouts for the argument file. 7338 */ 7339 void 7340 nfsrv_freefilelayouts(fhandle_t *fhp) 7341 { 7342 struct nfslayouthash *lhyp; 7343 struct nfslayout *lyp, *nlyp; 7344 7345 lhyp = NFSLAYOUTHASH(fhp); 7346 NFSLOCKLAYOUT(lhyp); 7347 TAILQ_FOREACH_SAFE(lyp, &lhyp->list, lay_list, nlyp) { 7348 if (NFSBCMP(&lyp->lay_fh, fhp, sizeof(*fhp)) == 0) 7349 nfsrv_freelayout(&lhyp->list, lyp); 7350 } 7351 NFSUNLOCKLAYOUT(lhyp); 7352 } 7353 7354 /* 7355 * Free all layouts. 7356 */ 7357 static void 7358 nfsrv_freealllayouts(void) 7359 { 7360 struct nfslayouthash *lhyp; 7361 struct nfslayout *lyp, *nlyp; 7362 int i; 7363 7364 for (i = 0; i < nfsrv_layouthashsize; i++) { 7365 lhyp = &nfslayouthash[i]; 7366 NFSLOCKLAYOUT(lhyp); 7367 TAILQ_FOREACH_SAFE(lyp, &lhyp->list, lay_list, nlyp) 7368 nfsrv_freelayout(&lhyp->list, lyp); 7369 NFSUNLOCKLAYOUT(lhyp); 7370 } 7371 } 7372 7373 /* 7374 * Look up the mount path for the DS server. 7375 */ 7376 static int 7377 nfsrv_setdsserver(char *dspathp, char *mdspathp, NFSPROC_T *p, 7378 struct nfsdevice **dsp) 7379 { 7380 struct nameidata nd; 7381 struct nfsdevice *ds; 7382 struct mount *mp; 7383 int error, i; 7384 char *dsdirpath; 7385 size_t dsdirsize; 7386 7387 NFSD_DEBUG(4, "setdssrv path=%s\n", dspathp); 7388 *dsp = NULL; 7389 NDINIT(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF, UIO_SYSSPACE, 7390 dspathp, p); 7391 error = namei(&nd); 7392 NFSD_DEBUG(4, "lookup=%d\n", error); 7393 if (error != 0) 7394 return (error); 7395 if (nd.ni_vp->v_type != VDIR) { 7396 vput(nd.ni_vp); 7397 NFSD_DEBUG(4, "dspath not dir\n"); 7398 return (ENOTDIR); 7399 } 7400 if (strcmp(nd.ni_vp->v_mount->mnt_vfc->vfc_name, "nfs") != 0) { 7401 vput(nd.ni_vp); 7402 NFSD_DEBUG(4, "dspath not an NFS mount\n"); 7403 return (ENXIO); 7404 } 7405 7406 /* 7407 * Allocate a DS server structure with the NFS mounted directory 7408 * vnode reference counted, so that a non-forced dismount will 7409 * fail with EBUSY. 7410 * This structure is always linked into the list, even if an error 7411 * is being returned. The caller will free the entire list upon 7412 * an error return. 7413 */ 7414 *dsp = ds = malloc(sizeof(*ds) + nfsrv_dsdirsize * sizeof(vnode_t), 7415 M_NFSDSTATE, M_WAITOK | M_ZERO); 7416 ds->nfsdev_dvp = nd.ni_vp; 7417 ds->nfsdev_nmp = VFSTONFS(nd.ni_vp->v_mount); 7418 NFSVOPUNLOCK(nd.ni_vp, 0); 7419 7420 dsdirsize = strlen(dspathp) + 16; 7421 dsdirpath = malloc(dsdirsize, M_TEMP, M_WAITOK); 7422 /* Now, create the DS directory structures. */ 7423 for (i = 0; i < nfsrv_dsdirsize; i++) { 7424 snprintf(dsdirpath, dsdirsize, "%s/ds%d", dspathp, i); 7425 NDINIT(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF, 7426 UIO_SYSSPACE, dsdirpath, p); 7427 error = namei(&nd); 7428 NFSD_DEBUG(4, "dsdirpath=%s lookup=%d\n", dsdirpath, error); 7429 if (error != 0) 7430 break; 7431 if (nd.ni_vp->v_type != VDIR) { 7432 vput(nd.ni_vp); 7433 error = ENOTDIR; 7434 NFSD_DEBUG(4, "dsdirpath not a VDIR\n"); 7435 break; 7436 } 7437 if (strcmp(nd.ni_vp->v_mount->mnt_vfc->vfc_name, "nfs") != 0) { 7438 vput(nd.ni_vp); 7439 error = ENXIO; 7440 NFSD_DEBUG(4, "dsdirpath not an NFS mount\n"); 7441 break; 7442 } 7443 ds->nfsdev_dsdir[i] = nd.ni_vp; 7444 NFSVOPUNLOCK(nd.ni_vp, 0); 7445 } 7446 free(dsdirpath, M_TEMP); 7447 7448 if (strlen(mdspathp) > 0) { 7449 /* 7450 * This DS stores file for a specific MDS exported file 7451 * system. 7452 */ 7453 NDINIT(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF, 7454 UIO_SYSSPACE, mdspathp, p); 7455 error = namei(&nd); 7456 NFSD_DEBUG(4, "mds lookup=%d\n", error); 7457 if (error != 0) 7458 goto out; 7459 if (nd.ni_vp->v_type != VDIR) { 7460 vput(nd.ni_vp); 7461 error = ENOTDIR; 7462 NFSD_DEBUG(4, "mdspath not dir\n"); 7463 goto out; 7464 } 7465 mp = nd.ni_vp->v_mount; 7466 if ((mp->mnt_flag & MNT_EXPORTED) == 0) { 7467 vput(nd.ni_vp); 7468 error = ENXIO; 7469 NFSD_DEBUG(4, "mdspath not an exported fs\n"); 7470 goto out; 7471 } 7472 ds->nfsdev_mdsfsid = mp->mnt_stat.f_fsid; 7473 ds->nfsdev_mdsisset = 1; 7474 vput(nd.ni_vp); 7475 } 7476 7477 out: 7478 TAILQ_INSERT_TAIL(&nfsrv_devidhead, ds, nfsdev_list); 7479 atomic_add_int(&nfsrv_devidcnt, 1); 7480 return (error); 7481 } 7482 7483 /* 7484 * Look up the mount path for the DS server and delete it. 7485 */ 7486 int 7487 nfsrv_deldsserver(int op, char *dspathp, NFSPROC_T *p) 7488 { 7489 struct mount *mp; 7490 struct nfsmount *nmp; 7491 struct nfsdevice *ds; 7492 int error; 7493 7494 NFSD_DEBUG(4, "deldssrv path=%s\n", dspathp); 7495 /* 7496 * Search for the path in the mount list. Avoid looking the path 7497 * up, since this mount point may be hung, with associated locked 7498 * vnodes, etc. 7499 * Set NFSMNTP_CANCELRPCS so that any forced dismount will be blocked 7500 * until this completes. 7501 * As noted in the man page, this should be done before any forced 7502 * dismount on the mount point, but at least the handshake on 7503 * NFSMNTP_CANCELRPCS should make it safe. 7504 */ 7505 error = 0; 7506 ds = NULL; 7507 nmp = NULL; 7508 mtx_lock(&mountlist_mtx); 7509 TAILQ_FOREACH(mp, &mountlist, mnt_list) { 7510 if (strcmp(mp->mnt_stat.f_mntonname, dspathp) == 0 && 7511 strcmp(mp->mnt_stat.f_fstypename, "nfs") == 0 && 7512 mp->mnt_data != NULL) { 7513 nmp = VFSTONFS(mp); 7514 NFSLOCKMNT(nmp); 7515 if ((nmp->nm_privflag & (NFSMNTP_FORCEDISM | 7516 NFSMNTP_CANCELRPCS)) == 0) { 7517 nmp->nm_privflag |= NFSMNTP_CANCELRPCS; 7518 NFSUNLOCKMNT(nmp); 7519 } else { 7520 NFSUNLOCKMNT(nmp); 7521 nmp = NULL; 7522 } 7523 break; 7524 } 7525 } 7526 mtx_unlock(&mountlist_mtx); 7527 7528 if (nmp != NULL) { 7529 ds = nfsrv_deldsnmp(op, nmp, p); 7530 NFSD_DEBUG(4, "deldsnmp=%p\n", ds); 7531 if (ds != NULL) { 7532 nfsrv_killrpcs(nmp); 7533 NFSD_DEBUG(4, "aft killrpcs\n"); 7534 } else 7535 error = ENXIO; 7536 NFSLOCKMNT(nmp); 7537 nmp->nm_privflag &= ~NFSMNTP_CANCELRPCS; 7538 wakeup(nmp); 7539 NFSUNLOCKMNT(nmp); 7540 } else 7541 error = EINVAL; 7542 return (error); 7543 } 7544 7545 /* 7546 * Search for and remove a DS entry which matches the "nmp" argument. 7547 * The nfsdevice structure pointer is returned so that the caller can 7548 * free it via nfsrv_freeonedevid(). 7549 * For the forced case, do not try to do LayoutRecalls, since the server 7550 * must be shut down now anyhow. 7551 */ 7552 struct nfsdevice * 7553 nfsrv_deldsnmp(int op, struct nfsmount *nmp, NFSPROC_T *p) 7554 { 7555 struct nfsdevice *fndds; 7556 7557 NFSD_DEBUG(4, "deldsdvp\n"); 7558 NFSDDSLOCK(); 7559 if (op == PNFSDOP_FORCEDELDS) 7560 fndds = nfsv4_findmirror(nmp); 7561 else 7562 fndds = nfsrv_findmirroredds(nmp); 7563 if (fndds != NULL) 7564 nfsrv_deleteds(fndds); 7565 NFSDDSUNLOCK(); 7566 if (fndds != NULL) { 7567 if (op != PNFSDOP_FORCEDELDS) 7568 nfsrv_flexmirrordel(fndds->nfsdev_deviceid, p); 7569 printf("pNFS server: mirror %s failed\n", fndds->nfsdev_host); 7570 } 7571 return (fndds); 7572 } 7573 7574 /* 7575 * Similar to nfsrv_deldsnmp(), except that the DS is indicated by deviceid. 7576 * This function also calls nfsrv_killrpcs() to unblock RPCs on the mount 7577 * point. 7578 * Also, returns an error instead of the nfsdevice found. 7579 */ 7580 static int 7581 nfsrv_delds(char *devid, NFSPROC_T *p) 7582 { 7583 struct nfsdevice *ds, *fndds; 7584 struct nfsmount *nmp; 7585 int fndmirror; 7586 7587 NFSD_DEBUG(4, "delds\n"); 7588 /* 7589 * Search the DS server list for a match with devid. 7590 * Remove the DS entry if found and there is a mirror. 7591 */ 7592 fndds = NULL; 7593 nmp = NULL; 7594 fndmirror = 0; 7595 NFSDDSLOCK(); 7596 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 7597 if (NFSBCMP(ds->nfsdev_deviceid, devid, NFSX_V4DEVICEID) == 0 && 7598 ds->nfsdev_nmp != NULL) { 7599 NFSD_DEBUG(4, "fnd main ds\n"); 7600 fndds = ds; 7601 break; 7602 } 7603 } 7604 if (fndds == NULL) { 7605 NFSDDSUNLOCK(); 7606 return (ENXIO); 7607 } 7608 if (fndds->nfsdev_mdsisset == 0 && nfsrv_faildscnt > 0) 7609 fndmirror = 1; 7610 else if (fndds->nfsdev_mdsisset != 0) { 7611 /* For the fsid is set case, search for a mirror. */ 7612 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 7613 if (ds != fndds && ds->nfsdev_nmp != NULL && 7614 ds->nfsdev_mdsisset != 0 && 7615 ds->nfsdev_mdsfsid.val[0] == 7616 fndds->nfsdev_mdsfsid.val[0] && 7617 ds->nfsdev_mdsfsid.val[1] == 7618 fndds->nfsdev_mdsfsid.val[1]) { 7619 fndmirror = 1; 7620 break; 7621 } 7622 } 7623 } 7624 if (fndmirror != 0) { 7625 nmp = fndds->nfsdev_nmp; 7626 NFSLOCKMNT(nmp); 7627 if ((nmp->nm_privflag & (NFSMNTP_FORCEDISM | 7628 NFSMNTP_CANCELRPCS)) == 0) { 7629 nmp->nm_privflag |= NFSMNTP_CANCELRPCS; 7630 NFSUNLOCKMNT(nmp); 7631 nfsrv_deleteds(fndds); 7632 } else { 7633 NFSUNLOCKMNT(nmp); 7634 nmp = NULL; 7635 } 7636 } 7637 NFSDDSUNLOCK(); 7638 if (nmp != NULL) { 7639 nfsrv_flexmirrordel(fndds->nfsdev_deviceid, p); 7640 printf("pNFS server: mirror %s failed\n", fndds->nfsdev_host); 7641 nfsrv_killrpcs(nmp); 7642 NFSLOCKMNT(nmp); 7643 nmp->nm_privflag &= ~NFSMNTP_CANCELRPCS; 7644 wakeup(nmp); 7645 NFSUNLOCKMNT(nmp); 7646 return (0); 7647 } 7648 return (ENXIO); 7649 } 7650 7651 /* 7652 * Mark a DS as disabled by setting nfsdev_nmp = NULL. 7653 */ 7654 static void 7655 nfsrv_deleteds(struct nfsdevice *fndds) 7656 { 7657 7658 NFSD_DEBUG(4, "deleteds: deleting a mirror\n"); 7659 fndds->nfsdev_nmp = NULL; 7660 if (fndds->nfsdev_mdsisset == 0) 7661 nfsrv_faildscnt--; 7662 } 7663 7664 /* 7665 * Fill in the addr structures for the File and Flex File layouts. 7666 */ 7667 static void 7668 nfsrv_allocdevid(struct nfsdevice *ds, char *addr, char *dnshost) 7669 { 7670 uint32_t *tl; 7671 char *netprot; 7672 int addrlen; 7673 static uint64_t new_devid = 0; 7674 7675 if (strchr(addr, ':') != NULL) 7676 netprot = "tcp6"; 7677 else 7678 netprot = "tcp"; 7679 7680 /* Fill in the device id. */ 7681 NFSBCOPY(&nfsdev_time, ds->nfsdev_deviceid, sizeof(nfsdev_time)); 7682 new_devid++; 7683 NFSBCOPY(&new_devid, &ds->nfsdev_deviceid[sizeof(nfsdev_time)], 7684 sizeof(new_devid)); 7685 7686 /* 7687 * Fill in the file addr (actually the nfsv4_file_layout_ds_addr4 7688 * as defined in RFC5661) in XDR. 7689 */ 7690 addrlen = NFSM_RNDUP(strlen(addr)) + NFSM_RNDUP(strlen(netprot)) + 7691 6 * NFSX_UNSIGNED; 7692 NFSD_DEBUG(4, "hn=%s addr=%s netprot=%s\n", dnshost, addr, netprot); 7693 ds->nfsdev_fileaddrlen = addrlen; 7694 tl = malloc(addrlen, M_NFSDSTATE, M_WAITOK | M_ZERO); 7695 ds->nfsdev_fileaddr = (char *)tl; 7696 *tl++ = txdr_unsigned(1); /* One stripe with index 0. */ 7697 *tl++ = 0; 7698 *tl++ = txdr_unsigned(1); /* One multipath list */ 7699 *tl++ = txdr_unsigned(1); /* with one entry in it. */ 7700 /* The netaddr for this one entry. */ 7701 *tl++ = txdr_unsigned(strlen(netprot)); 7702 NFSBCOPY(netprot, tl, strlen(netprot)); 7703 tl += (NFSM_RNDUP(strlen(netprot)) / NFSX_UNSIGNED); 7704 *tl++ = txdr_unsigned(strlen(addr)); 7705 NFSBCOPY(addr, tl, strlen(addr)); 7706 7707 /* 7708 * Fill in the flex file addr (actually the ff_device_addr4 7709 * as defined for Flexible File Layout) in XDR. 7710 */ 7711 addrlen = NFSM_RNDUP(strlen(addr)) + NFSM_RNDUP(strlen(netprot)) + 7712 9 * NFSX_UNSIGNED; 7713 ds->nfsdev_flexaddrlen = addrlen; 7714 tl = malloc(addrlen, M_NFSDSTATE, M_WAITOK | M_ZERO); 7715 ds->nfsdev_flexaddr = (char *)tl; 7716 *tl++ = txdr_unsigned(1); /* One multipath entry. */ 7717 /* The netaddr for this one entry. */ 7718 *tl++ = txdr_unsigned(strlen(netprot)); 7719 NFSBCOPY(netprot, tl, strlen(netprot)); 7720 tl += (NFSM_RNDUP(strlen(netprot)) / NFSX_UNSIGNED); 7721 *tl++ = txdr_unsigned(strlen(addr)); 7722 NFSBCOPY(addr, tl, strlen(addr)); 7723 tl += (NFSM_RNDUP(strlen(addr)) / NFSX_UNSIGNED); 7724 *tl++ = txdr_unsigned(1); /* One NFS Version. */ 7725 *tl++ = txdr_unsigned(NFS_VER4); /* NFSv4. */ 7726 *tl++ = txdr_unsigned(NFSV41_MINORVERSION); /* Minor version 1. */ 7727 *tl++ = txdr_unsigned(NFS_SRVMAXIO); /* DS max rsize. */ 7728 *tl++ = txdr_unsigned(NFS_SRVMAXIO); /* DS max wsize. */ 7729 *tl = newnfs_true; /* Tightly coupled. */ 7730 7731 ds->nfsdev_hostnamelen = strlen(dnshost); 7732 ds->nfsdev_host = malloc(ds->nfsdev_hostnamelen + 1, M_NFSDSTATE, 7733 M_WAITOK); 7734 NFSBCOPY(dnshost, ds->nfsdev_host, ds->nfsdev_hostnamelen + 1); 7735 } 7736 7737 7738 /* 7739 * Create the device id list. 7740 * Return 0 if the nfsd threads are to run and ENXIO if the "-p" argument 7741 * is misconfigured. 7742 */ 7743 int 7744 nfsrv_createdevids(struct nfsd_nfsd_args *args, NFSPROC_T *p) 7745 { 7746 struct nfsdevice *ds; 7747 char *addrp, *dnshostp, *dspathp, *mdspathp; 7748 int error, i; 7749 7750 addrp = args->addr; 7751 dnshostp = args->dnshost; 7752 dspathp = args->dspath; 7753 mdspathp = args->mdspath; 7754 nfsrv_maxpnfsmirror = args->mirrorcnt; 7755 if (addrp == NULL || dnshostp == NULL || dspathp == NULL || 7756 mdspathp == NULL) 7757 return (0); 7758 7759 /* 7760 * Loop around for each nul-terminated string in args->addr, 7761 * args->dnshost, args->dnspath and args->mdspath. 7762 */ 7763 while (addrp < (args->addr + args->addrlen) && 7764 dnshostp < (args->dnshost + args->dnshostlen) && 7765 dspathp < (args->dspath + args->dspathlen) && 7766 mdspathp < (args->mdspath + args->mdspathlen)) { 7767 error = nfsrv_setdsserver(dspathp, mdspathp, p, &ds); 7768 if (error != 0) { 7769 /* Free all DS servers. */ 7770 nfsrv_freealldevids(); 7771 nfsrv_devidcnt = 0; 7772 return (ENXIO); 7773 } 7774 nfsrv_allocdevid(ds, addrp, dnshostp); 7775 addrp += (strlen(addrp) + 1); 7776 dnshostp += (strlen(dnshostp) + 1); 7777 dspathp += (strlen(dspathp) + 1); 7778 mdspathp += (strlen(mdspathp) + 1); 7779 } 7780 if (nfsrv_devidcnt < nfsrv_maxpnfsmirror) { 7781 /* Free all DS servers. */ 7782 nfsrv_freealldevids(); 7783 nfsrv_devidcnt = 0; 7784 nfsrv_maxpnfsmirror = 1; 7785 return (ENXIO); 7786 } 7787 /* We can fail at most one less DS than the mirror level. */ 7788 nfsrv_faildscnt = nfsrv_maxpnfsmirror - 1; 7789 7790 /* 7791 * Allocate the nfslayout hash table now, since this is a pNFS server. 7792 * Make it 1% of the high water mark and at least 100. 7793 */ 7794 if (nfslayouthash == NULL) { 7795 nfsrv_layouthashsize = nfsrv_layouthighwater / 100; 7796 if (nfsrv_layouthashsize < 100) 7797 nfsrv_layouthashsize = 100; 7798 nfslayouthash = mallocarray(nfsrv_layouthashsize, 7799 sizeof(struct nfslayouthash), M_NFSDSESSION, M_WAITOK | 7800 M_ZERO); 7801 for (i = 0; i < nfsrv_layouthashsize; i++) { 7802 mtx_init(&nfslayouthash[i].mtx, "nfslm", NULL, MTX_DEF); 7803 TAILQ_INIT(&nfslayouthash[i].list); 7804 } 7805 } 7806 return (0); 7807 } 7808 7809 /* 7810 * Free all device ids. 7811 */ 7812 static void 7813 nfsrv_freealldevids(void) 7814 { 7815 struct nfsdevice *ds, *nds; 7816 7817 TAILQ_FOREACH_SAFE(ds, &nfsrv_devidhead, nfsdev_list, nds) 7818 nfsrv_freedevid(ds); 7819 } 7820 7821 /* 7822 * Check to see if there is a Read/Write Layout plus either: 7823 * - A Write Delegation 7824 * or 7825 * - An Open with Write_access. 7826 * Return 1 if this is the case and 0 otherwise. 7827 * This function is used by nfsrv_proxyds() to decide if doing a Proxy 7828 * Getattr RPC to the Data Server (DS) is necessary. 7829 */ 7830 #define NFSCLIDVECSIZE 6 7831 APPLESTATIC int 7832 nfsrv_checkdsattr(struct nfsrv_descript *nd, vnode_t vp, NFSPROC_T *p) 7833 { 7834 fhandle_t fh, *tfhp; 7835 struct nfsstate *stp; 7836 struct nfslayout *lyp; 7837 struct nfslayouthash *lhyp; 7838 struct nfslockhashhead *hp; 7839 struct nfslockfile *lfp; 7840 nfsquad_t clid[NFSCLIDVECSIZE]; 7841 int clidcnt, ret; 7842 7843 ret = nfsvno_getfh(vp, &fh, p); 7844 if (ret != 0) 7845 return (0); 7846 7847 /* First check for a Read/Write Layout. */ 7848 clidcnt = 0; 7849 lhyp = NFSLAYOUTHASH(&fh); 7850 NFSLOCKLAYOUT(lhyp); 7851 TAILQ_FOREACH(lyp, &lhyp->list, lay_list) { 7852 if (NFSBCMP(&lyp->lay_fh, &fh, sizeof(fh)) == 0 && 7853 ((lyp->lay_flags & NFSLAY_RW) != 0 || 7854 ((lyp->lay_flags & NFSLAY_READ) != 0 && 7855 nfsrv_pnfsatime != 0))) { 7856 if (clidcnt < NFSCLIDVECSIZE) 7857 clid[clidcnt].qval = lyp->lay_clientid.qval; 7858 clidcnt++; 7859 } 7860 } 7861 NFSUNLOCKLAYOUT(lhyp); 7862 if (clidcnt == 0) { 7863 /* None found, so return 0. */ 7864 return (0); 7865 } 7866 7867 /* Get the nfslockfile for this fh. */ 7868 NFSLOCKSTATE(); 7869 hp = NFSLOCKHASH(&fh); 7870 LIST_FOREACH(lfp, hp, lf_hash) { 7871 tfhp = &lfp->lf_fh; 7872 if (NFSVNO_CMPFH(&fh, tfhp)) 7873 break; 7874 } 7875 if (lfp == NULL) { 7876 /* None found, so return 0. */ 7877 NFSUNLOCKSTATE(); 7878 return (0); 7879 } 7880 7881 /* Now, look for a Write delegation for this clientid. */ 7882 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) { 7883 if ((stp->ls_flags & NFSLCK_DELEGWRITE) != 0 && 7884 nfsrv_fndclid(clid, stp->ls_clp->lc_clientid, clidcnt) != 0) 7885 break; 7886 } 7887 if (stp != NULL) { 7888 /* Found one, so return 1. */ 7889 NFSUNLOCKSTATE(); 7890 return (1); 7891 } 7892 7893 /* No Write delegation, so look for an Open with Write_access. */ 7894 LIST_FOREACH(stp, &lfp->lf_open, ls_file) { 7895 KASSERT((stp->ls_flags & NFSLCK_OPEN) != 0, 7896 ("nfsrv_checkdsattr: Non-open in Open list\n")); 7897 if ((stp->ls_flags & NFSLCK_WRITEACCESS) != 0 && 7898 nfsrv_fndclid(clid, stp->ls_clp->lc_clientid, clidcnt) != 0) 7899 break; 7900 } 7901 NFSUNLOCKSTATE(); 7902 if (stp != NULL) 7903 return (1); 7904 return (0); 7905 } 7906 7907 /* 7908 * Look for a matching clientid in the vector. Return 1 if one might match. 7909 */ 7910 static int 7911 nfsrv_fndclid(nfsquad_t *clidvec, nfsquad_t clid, int clidcnt) 7912 { 7913 int i; 7914 7915 /* If too many for the vector, return 1 since there might be a match. */ 7916 if (clidcnt > NFSCLIDVECSIZE) 7917 return (1); 7918 7919 for (i = 0; i < clidcnt; i++) 7920 if (clidvec[i].qval == clid.qval) 7921 return (1); 7922 return (0); 7923 } 7924 7925 /* 7926 * Check the don't list for "vp" and see if issuing an rw layout is allowed. 7927 * Return 1 if issuing an rw layout isn't allowed, 0 otherwise. 7928 */ 7929 static int 7930 nfsrv_dontlayout(fhandle_t *fhp) 7931 { 7932 struct nfsdontlist *mrp; 7933 int ret; 7934 7935 if (nfsrv_dontlistlen == 0) 7936 return (0); 7937 ret = 0; 7938 NFSDDONTLISTLOCK(); 7939 LIST_FOREACH(mrp, &nfsrv_dontlisthead, nfsmr_list) { 7940 if (NFSBCMP(fhp, &mrp->nfsmr_fh, sizeof(*fhp)) == 0 && 7941 (mrp->nfsmr_flags & NFSMR_DONTLAYOUT) != 0) { 7942 ret = 1; 7943 break; 7944 } 7945 } 7946 NFSDDONTLISTUNLOCK(); 7947 return (ret); 7948 } 7949 7950 #define PNFSDS_COPYSIZ 65536 7951 /* 7952 * Create a new file on a DS and copy the contents of an extant DS file to it. 7953 * This can be used for recovery of a DS file onto a recovered DS. 7954 * The steps are: 7955 * - When called, the MDS file's vnode is locked, blocking LayoutGet operations. 7956 * - Disable issuing of read/write layouts for the file via the nfsdontlist, 7957 * so that they will be disabled after the MDS file's vnode is unlocked. 7958 * - Set up the nfsrv_recalllist so that recall of read/write layouts can 7959 * be done. 7960 * - Unlock the MDS file's vnode, so that the client(s) can perform proxied 7961 * writes, LayoutCommits and LayoutReturns for the file when completing the 7962 * LayoutReturn requested by the LayoutRecall callback. 7963 * - Issue a LayoutRecall callback for all read/write layouts and wait for 7964 * them to be returned. (If the LayoutRecall callback replies 7965 * NFSERR_NOMATCHLAYOUT, they are gone and no LayoutReturn is needed.) 7966 * - Exclusively lock the MDS file's vnode. This ensures that no proxied 7967 * writes are in progress or can occur during the DS file copy. 7968 * It also blocks Setattr operations. 7969 * - Create the file on the recovered mirror. 7970 * - Copy the file from the operational DS. 7971 * - Copy any ACL from the MDS file to the new DS file. 7972 * - Set the modify time of the new DS file to that of the MDS file. 7973 * - Update the extended attribute for the MDS file. 7974 * - Enable issuing of rw layouts by deleting the nfsdontlist entry. 7975 * - The caller will unlock the MDS file's vnode allowing operations 7976 * to continue normally, since it is now on the mirror again. 7977 */ 7978 int 7979 nfsrv_copymr(vnode_t vp, vnode_t fvp, vnode_t dvp, struct nfsdevice *ds, 7980 struct pnfsdsfile *pf, struct pnfsdsfile *wpf, int mirrorcnt, 7981 struct ucred *cred, NFSPROC_T *p) 7982 { 7983 struct nfsdontlist *mrp, *nmrp; 7984 struct nfslayouthash *lhyp; 7985 struct nfslayout *lyp, *nlyp; 7986 struct nfslayouthead thl; 7987 struct mount *mp; 7988 struct acl *aclp; 7989 struct vattr va; 7990 struct timespec mtime; 7991 fhandle_t fh; 7992 vnode_t tvp; 7993 off_t rdpos, wrpos; 7994 ssize_t aresid; 7995 char *dat; 7996 int didprintf, ret, retacl, xfer; 7997 7998 ASSERT_VOP_LOCKED(fvp, "nfsrv_copymr fvp"); 7999 ASSERT_VOP_LOCKED(vp, "nfsrv_copymr vp"); 8000 /* 8001 * Allocate a nfsdontlist entry and set the NFSMR_DONTLAYOUT flag 8002 * so that no more RW layouts will get issued. 8003 */ 8004 ret = nfsvno_getfh(vp, &fh, p); 8005 if (ret != 0) { 8006 NFSD_DEBUG(4, "nfsrv_copymr: getfh=%d\n", ret); 8007 return (ret); 8008 } 8009 nmrp = malloc(sizeof(*nmrp), M_NFSDSTATE, M_WAITOK); 8010 nmrp->nfsmr_flags = NFSMR_DONTLAYOUT; 8011 NFSBCOPY(&fh, &nmrp->nfsmr_fh, sizeof(fh)); 8012 NFSDDONTLISTLOCK(); 8013 LIST_FOREACH(mrp, &nfsrv_dontlisthead, nfsmr_list) { 8014 if (NFSBCMP(&fh, &mrp->nfsmr_fh, sizeof(fh)) == 0) 8015 break; 8016 } 8017 if (mrp == NULL) { 8018 LIST_INSERT_HEAD(&nfsrv_dontlisthead, nmrp, nfsmr_list); 8019 mrp = nmrp; 8020 nmrp = NULL; 8021 nfsrv_dontlistlen++; 8022 NFSD_DEBUG(4, "nfsrv_copymr: in dontlist\n"); 8023 } else { 8024 NFSDDONTLISTUNLOCK(); 8025 free(nmrp, M_NFSDSTATE); 8026 NFSD_DEBUG(4, "nfsrv_copymr: dup dontlist\n"); 8027 return (ENXIO); 8028 } 8029 NFSDDONTLISTUNLOCK(); 8030 8031 /* 8032 * Search for all RW layouts for this file. Move them to the 8033 * recall list, so they can be recalled and their return noted. 8034 */ 8035 lhyp = NFSLAYOUTHASH(&fh); 8036 NFSDRECALLLOCK(); 8037 NFSLOCKLAYOUT(lhyp); 8038 TAILQ_FOREACH_SAFE(lyp, &lhyp->list, lay_list, nlyp) { 8039 if (NFSBCMP(&lyp->lay_fh, &fh, sizeof(fh)) == 0 && 8040 (lyp->lay_flags & NFSLAY_RW) != 0) { 8041 TAILQ_REMOVE(&lhyp->list, lyp, lay_list); 8042 TAILQ_INSERT_HEAD(&nfsrv_recalllisthead, lyp, lay_list); 8043 lyp->lay_trycnt = 0; 8044 } 8045 } 8046 NFSUNLOCKLAYOUT(lhyp); 8047 NFSDRECALLUNLOCK(); 8048 8049 ret = 0; 8050 didprintf = 0; 8051 TAILQ_INIT(&thl); 8052 /* Unlock the MDS vp, so that a LayoutReturn can be done on it. */ 8053 NFSVOPUNLOCK(vp, 0); 8054 /* Now, do a recall for all layouts not yet recalled. */ 8055 tryagain: 8056 NFSDRECALLLOCK(); 8057 TAILQ_FOREACH(lyp, &nfsrv_recalllisthead, lay_list) { 8058 if (NFSBCMP(&lyp->lay_fh, &fh, sizeof(fh)) == 0 && 8059 (lyp->lay_flags & NFSLAY_RECALL) == 0) { 8060 lyp->lay_flags |= NFSLAY_RECALL; 8061 /* 8062 * The layout stateid.seqid needs to be incremented 8063 * before doing a LAYOUT_RECALL callback. 8064 */ 8065 if (++lyp->lay_stateid.seqid == 0) 8066 lyp->lay_stateid.seqid = 1; 8067 NFSDRECALLUNLOCK(); 8068 nfsrv_recalllayout(lyp->lay_clientid, &lyp->lay_stateid, 8069 &lyp->lay_fh, lyp, &nfsrv_recalllisthead, 8070 lyp->lay_type, p); 8071 NFSD_DEBUG(4, "nfsrv_copymr: recalled layout\n"); 8072 goto tryagain; 8073 } 8074 } 8075 8076 /* Now wait for them to be returned. */ 8077 tryagain2: 8078 TAILQ_FOREACH(lyp, &nfsrv_recalllisthead, lay_list) { 8079 if (NFSBCMP(&lyp->lay_fh, &fh, sizeof(fh)) == 0) { 8080 if ((lyp->lay_flags & NFSLAY_RETURNED) != 0) { 8081 TAILQ_REMOVE(&nfsrv_recalllisthead, lyp, 8082 lay_list); 8083 TAILQ_INSERT_HEAD(&thl, lyp, lay_list); 8084 NFSD_DEBUG(4, 8085 "nfsrv_copymr: layout returned\n"); 8086 } else { 8087 ret = mtx_sleep(lyp, NFSDRECALLMUTEXPTR, 8088 PVFS | PCATCH, "nfsmrl", hz); 8089 NFSD_DEBUG(4, "nfsrv_copymr: aft sleep=%d\n", 8090 ret); 8091 if (ret == EINTR || ret == ERESTART) 8092 break; 8093 if ((lyp->lay_flags & NFSLAY_RETURNED) == 0 && 8094 didprintf == 0) { 8095 printf("nfsrv_copymr: layout not " 8096 "returned\n"); 8097 didprintf = 1; 8098 } 8099 } 8100 goto tryagain2; 8101 } 8102 } 8103 NFSDRECALLUNLOCK(); 8104 /* We can now get rid of the layouts that have been returned. */ 8105 TAILQ_FOREACH_SAFE(lyp, &thl, lay_list, nlyp) 8106 nfsrv_freelayout(&thl, lyp); 8107 8108 /* 8109 * LK_EXCLUSIVE lock the MDS vnode, so that any 8110 * proxied writes through the MDS will be blocked until we have 8111 * completed the copy and update of the extended attributes. 8112 * This will also ensure that any attributes and ACL will not be 8113 * changed until the copy is complete. 8114 */ 8115 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 8116 if ((vp->v_iflag & VI_DOOMED) != 0) { 8117 NFSD_DEBUG(4, "nfsrv_copymr: lk_exclusive doomed\n"); 8118 ret = ESTALE; 8119 } 8120 8121 /* Create the data file on the recovered DS. */ 8122 if (ret == 0) 8123 ret = nfsrv_createdsfile(vp, &fh, pf, dvp, ds, cred, p, &tvp); 8124 8125 /* Copy the DS file, if created successfully. */ 8126 if (ret == 0) { 8127 /* 8128 * Get any NFSv4 ACL on the MDS file, so that it can be set 8129 * on the new DS file. 8130 */ 8131 aclp = acl_alloc(M_WAITOK | M_ZERO); 8132 retacl = VOP_GETACL(vp, ACL_TYPE_NFS4, aclp, cred, p); 8133 if (retacl != 0 && retacl != ENOATTR) 8134 NFSD_DEBUG(1, "nfsrv_copymr: vop_getacl=%d\n", retacl); 8135 dat = malloc(PNFSDS_COPYSIZ, M_TEMP, M_WAITOK); 8136 /* Malloc a block of 0s used to check for holes. */ 8137 if (nfsrv_zeropnfsdat == NULL) 8138 nfsrv_zeropnfsdat = malloc(PNFSDS_COPYSIZ, M_TEMP, 8139 M_WAITOK | M_ZERO); 8140 rdpos = wrpos = 0; 8141 mp = NULL; 8142 ret = vn_start_write(tvp, &mp, V_WAIT | PCATCH); 8143 if (ret == 0) 8144 ret = VOP_GETATTR(fvp, &va, cred); 8145 aresid = 0; 8146 while (ret == 0 && aresid == 0) { 8147 ret = vn_rdwr(UIO_READ, fvp, dat, PNFSDS_COPYSIZ, 8148 rdpos, UIO_SYSSPACE, IO_NODELOCKED, cred, NULL, 8149 &aresid, p); 8150 xfer = PNFSDS_COPYSIZ - aresid; 8151 if (ret == 0 && xfer > 0) { 8152 rdpos += xfer; 8153 /* 8154 * Skip the write for holes, except for the 8155 * last block. 8156 */ 8157 if (xfer < PNFSDS_COPYSIZ || rdpos == 8158 va.va_size || NFSBCMP(dat, 8159 nfsrv_zeropnfsdat, PNFSDS_COPYSIZ) != 0) 8160 ret = vn_rdwr(UIO_WRITE, tvp, dat, xfer, 8161 wrpos, UIO_SYSSPACE, IO_NODELOCKED, 8162 cred, NULL, NULL, p); 8163 if (ret == 0) 8164 wrpos += xfer; 8165 } 8166 } 8167 8168 /* If there is an ACL and the copy succeeded, set the ACL. */ 8169 if (ret == 0 && retacl == 0) { 8170 ret = VOP_SETACL(tvp, ACL_TYPE_NFS4, aclp, cred, p); 8171 /* 8172 * Don't consider these as errors, since VOP_GETACL() 8173 * can return an ACL when they are not actually 8174 * supported. For example, for UFS, VOP_GETACL() 8175 * will return a trivial ACL based on the uid/gid/mode 8176 * when there is no ACL on the file. 8177 * This case should be recognized as a trivial ACL 8178 * by UFS's VOP_SETACL() and succeed, but... 8179 */ 8180 if (ret == ENOATTR || ret == EOPNOTSUPP || ret == EPERM) 8181 ret = 0; 8182 } 8183 8184 if (mp != NULL) 8185 vn_finished_write(mp); 8186 if (ret == 0) 8187 ret = VOP_FSYNC(tvp, MNT_WAIT, p); 8188 8189 /* Set the DS data file's modify time that of the MDS file. */ 8190 if (ret == 0) 8191 ret = VOP_GETATTR(vp, &va, cred); 8192 if (ret == 0) { 8193 mtime = va.va_mtime; 8194 VATTR_NULL(&va); 8195 va.va_mtime = mtime; 8196 ret = VOP_SETATTR(tvp, &va, cred); 8197 } 8198 8199 vput(tvp); 8200 acl_free(aclp); 8201 free(dat, M_TEMP); 8202 } 8203 8204 /* Update the extended attributes for the newly created DS file. */ 8205 if (ret == 0) { 8206 mp = NULL; 8207 ret = vn_start_write(vp, &mp, V_WAIT | PCATCH); 8208 if (ret == 0) 8209 ret = vn_extattr_set(vp, IO_NODELOCKED, 8210 EXTATTR_NAMESPACE_SYSTEM, "pnfsd.dsfile", 8211 sizeof(*wpf) * mirrorcnt, (char *)wpf, p); 8212 if (mp != NULL) 8213 vn_finished_write(mp); 8214 } 8215 8216 /* Get rid of the dontlist entry, so that Layouts can be issued. */ 8217 NFSDDONTLISTLOCK(); 8218 LIST_REMOVE(mrp, nfsmr_list); 8219 NFSDDONTLISTUNLOCK(); 8220 free(mrp, M_NFSDSTATE); 8221 return (ret); 8222 } 8223 8224 /* 8225 * Create a data storage file on the recovered DS. 8226 */ 8227 static int 8228 nfsrv_createdsfile(vnode_t vp, fhandle_t *fhp, struct pnfsdsfile *pf, 8229 vnode_t dvp, struct nfsdevice *ds, struct ucred *cred, NFSPROC_T *p, 8230 vnode_t *tvpp) 8231 { 8232 struct vattr va, nva; 8233 int error; 8234 8235 /* Make data file name based on FH. */ 8236 error = VOP_GETATTR(vp, &va, cred); 8237 if (error == 0) { 8238 /* Set the attributes for "vp" to Setattr the DS vp. */ 8239 VATTR_NULL(&nva); 8240 nva.va_uid = va.va_uid; 8241 nva.va_gid = va.va_gid; 8242 nva.va_mode = va.va_mode; 8243 nva.va_size = 0; 8244 VATTR_NULL(&va); 8245 va.va_type = VREG; 8246 va.va_mode = nva.va_mode; 8247 NFSD_DEBUG(4, "nfsrv_dscreatefile: dvp=%p pf=%p\n", dvp, pf); 8248 error = nfsrv_dscreate(dvp, &va, &nva, fhp, pf, NULL, 8249 pf->dsf_filename, cred, p, tvpp); 8250 } 8251 return (error); 8252 } 8253 8254 /* 8255 * Look up the MDS file shared locked, and then get the extended attribute 8256 * to find the extant DS file to be copied to the new mirror. 8257 * If successful, *vpp is set to the MDS file's vp and *nvpp is 8258 * set to a DS data file for the MDS file, both exclusively locked. 8259 * The "buf" argument has the pnfsdsfile structure from the MDS file 8260 * in it and buflen is set to its length. 8261 */ 8262 int 8263 nfsrv_mdscopymr(char *mdspathp, char *dspathp, char *curdspathp, char *buf, 8264 int *buflenp, char *fname, NFSPROC_T *p, struct vnode **vpp, 8265 struct vnode **nvpp, struct pnfsdsfile **pfp, struct nfsdevice **dsp, 8266 struct nfsdevice **fdsp) 8267 { 8268 struct nameidata nd; 8269 struct vnode *vp, *curvp; 8270 struct pnfsdsfile *pf; 8271 struct nfsmount *nmp, *curnmp; 8272 int dsdir, error, mirrorcnt, ippos; 8273 8274 vp = NULL; 8275 curvp = NULL; 8276 curnmp = NULL; 8277 *dsp = NULL; 8278 *fdsp = NULL; 8279 if (dspathp == NULL && curdspathp != NULL) 8280 return (EPERM); 8281 8282 /* 8283 * Look up the MDS file shared locked. The lock will be upgraded 8284 * to an exclusive lock after any rw layouts have been returned. 8285 */ 8286 NFSD_DEBUG(4, "mdsopen path=%s\n", mdspathp); 8287 NDINIT(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF, UIO_SYSSPACE, 8288 mdspathp, p); 8289 error = namei(&nd); 8290 NFSD_DEBUG(4, "lookup=%d\n", error); 8291 if (error != 0) 8292 return (error); 8293 if (nd.ni_vp->v_type != VREG) { 8294 vput(nd.ni_vp); 8295 NFSD_DEBUG(4, "mdspath not reg\n"); 8296 return (EISDIR); 8297 } 8298 vp = nd.ni_vp; 8299 8300 if (curdspathp != NULL) { 8301 /* 8302 * Look up the current DS path and find the nfsdev structure for 8303 * it. 8304 */ 8305 NFSD_DEBUG(4, "curmdsdev path=%s\n", curdspathp); 8306 NDINIT(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF, 8307 UIO_SYSSPACE, curdspathp, p); 8308 error = namei(&nd); 8309 NFSD_DEBUG(4, "ds lookup=%d\n", error); 8310 if (error != 0) { 8311 vput(vp); 8312 return (error); 8313 } 8314 if (nd.ni_vp->v_type != VDIR) { 8315 vput(nd.ni_vp); 8316 vput(vp); 8317 NFSD_DEBUG(4, "curdspath not dir\n"); 8318 return (ENOTDIR); 8319 } 8320 if (strcmp(nd.ni_vp->v_mount->mnt_vfc->vfc_name, "nfs") != 0) { 8321 vput(nd.ni_vp); 8322 vput(vp); 8323 NFSD_DEBUG(4, "curdspath not an NFS mount\n"); 8324 return (ENXIO); 8325 } 8326 curnmp = VFSTONFS(nd.ni_vp->v_mount); 8327 8328 /* Search the nfsdev list for a match. */ 8329 NFSDDSLOCK(); 8330 *fdsp = nfsv4_findmirror(curnmp); 8331 NFSDDSUNLOCK(); 8332 if (*fdsp == NULL) 8333 curnmp = NULL; 8334 if (curnmp == NULL) { 8335 vput(nd.ni_vp); 8336 vput(vp); 8337 NFSD_DEBUG(4, "mdscopymr: no current ds\n"); 8338 return (ENXIO); 8339 } 8340 curvp = nd.ni_vp; 8341 } 8342 8343 if (dspathp != NULL) { 8344 /* Look up the nfsdev path and find the nfsdev structure. */ 8345 NFSD_DEBUG(4, "mdsdev path=%s\n", dspathp); 8346 NDINIT(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF, 8347 UIO_SYSSPACE, dspathp, p); 8348 error = namei(&nd); 8349 NFSD_DEBUG(4, "ds lookup=%d\n", error); 8350 if (error != 0) { 8351 vput(vp); 8352 if (curvp != NULL) 8353 vput(curvp); 8354 return (error); 8355 } 8356 if (nd.ni_vp->v_type != VDIR || nd.ni_vp == curvp) { 8357 vput(nd.ni_vp); 8358 vput(vp); 8359 if (curvp != NULL) 8360 vput(curvp); 8361 NFSD_DEBUG(4, "dspath not dir\n"); 8362 if (nd.ni_vp == curvp) 8363 return (EPERM); 8364 return (ENOTDIR); 8365 } 8366 if (strcmp(nd.ni_vp->v_mount->mnt_vfc->vfc_name, "nfs") != 0) { 8367 vput(nd.ni_vp); 8368 vput(vp); 8369 if (curvp != NULL) 8370 vput(curvp); 8371 NFSD_DEBUG(4, "dspath not an NFS mount\n"); 8372 return (ENXIO); 8373 } 8374 nmp = VFSTONFS(nd.ni_vp->v_mount); 8375 8376 /* 8377 * Search the nfsdevice list for a match. If curnmp == NULL, 8378 * this is a recovery and there must be a mirror. 8379 */ 8380 NFSDDSLOCK(); 8381 if (curnmp == NULL) 8382 *dsp = nfsrv_findmirroredds(nmp); 8383 else 8384 *dsp = nfsv4_findmirror(nmp); 8385 NFSDDSUNLOCK(); 8386 if (*dsp == NULL) { 8387 vput(nd.ni_vp); 8388 vput(vp); 8389 if (curvp != NULL) 8390 vput(curvp); 8391 NFSD_DEBUG(4, "mdscopymr: no ds\n"); 8392 return (ENXIO); 8393 } 8394 } else { 8395 nd.ni_vp = NULL; 8396 nmp = NULL; 8397 } 8398 8399 /* 8400 * Get a vp for an available DS data file using the extended 8401 * attribute on the MDS file. 8402 * If there is a valid entry for the new DS in the extended attribute 8403 * on the MDS file (as checked via the nmp argument), 8404 * nfsrv_dsgetsockmnt() returns EEXIST, so no copying will occur. 8405 */ 8406 error = nfsrv_dsgetsockmnt(vp, 0, buf, buflenp, &mirrorcnt, p, 8407 NULL, NULL, NULL, fname, nvpp, &nmp, curnmp, &ippos, &dsdir); 8408 if (curvp != NULL) 8409 vput(curvp); 8410 if (nd.ni_vp == NULL) { 8411 if (error == 0 && nmp != NULL) { 8412 /* Search the nfsdev list for a match. */ 8413 NFSDDSLOCK(); 8414 *dsp = nfsrv_findmirroredds(nmp); 8415 NFSDDSUNLOCK(); 8416 } 8417 if (error == 0 && (nmp == NULL || *dsp == NULL)) { 8418 if (nvpp != NULL && *nvpp != NULL) { 8419 vput(*nvpp); 8420 *nvpp = NULL; 8421 } 8422 error = ENXIO; 8423 } 8424 } else 8425 vput(nd.ni_vp); 8426 8427 /* 8428 * When dspathp != NULL and curdspathp == NULL, this is a recovery 8429 * and is only allowed if there is a 0.0.0.0 IP address entry. 8430 * When curdspathp != NULL, the ippos will be set to that entry. 8431 */ 8432 if (error == 0 && dspathp != NULL && ippos == -1) { 8433 if (nvpp != NULL && *nvpp != NULL) { 8434 vput(*nvpp); 8435 *nvpp = NULL; 8436 } 8437 error = ENXIO; 8438 } 8439 if (error == 0) { 8440 *vpp = vp; 8441 8442 pf = (struct pnfsdsfile *)buf; 8443 if (ippos == -1) { 8444 /* If no zeroip pnfsdsfile, add one. */ 8445 ippos = *buflenp / sizeof(*pf); 8446 *buflenp += sizeof(*pf); 8447 pf += ippos; 8448 pf->dsf_dir = dsdir; 8449 strlcpy(pf->dsf_filename, fname, 8450 sizeof(pf->dsf_filename)); 8451 } else 8452 pf += ippos; 8453 *pfp = pf; 8454 } else 8455 vput(vp); 8456 return (error); 8457 } 8458 8459 /* 8460 * Search for a matching pnfsd mirror device structure, base on the nmp arg. 8461 * Return one if found, NULL otherwise. 8462 */ 8463 static struct nfsdevice * 8464 nfsrv_findmirroredds(struct nfsmount *nmp) 8465 { 8466 struct nfsdevice *ds, *fndds; 8467 int fndmirror; 8468 8469 mtx_assert(NFSDDSMUTEXPTR, MA_OWNED); 8470 /* 8471 * Search the DS server list for a match with nmp. 8472 * Remove the DS entry if found and there is a mirror. 8473 */ 8474 fndds = NULL; 8475 fndmirror = 0; 8476 if (nfsrv_devidcnt == 0) 8477 return (fndds); 8478 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 8479 if (ds->nfsdev_nmp == nmp) { 8480 NFSD_DEBUG(4, "nfsrv_findmirroredds: fnd main ds\n"); 8481 fndds = ds; 8482 break; 8483 } 8484 } 8485 if (fndds == NULL) 8486 return (fndds); 8487 if (fndds->nfsdev_mdsisset == 0 && nfsrv_faildscnt > 0) 8488 fndmirror = 1; 8489 else if (fndds->nfsdev_mdsisset != 0) { 8490 /* For the fsid is set case, search for a mirror. */ 8491 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 8492 if (ds != fndds && ds->nfsdev_nmp != NULL && 8493 ds->nfsdev_mdsisset != 0 && 8494 ds->nfsdev_mdsfsid.val[0] == 8495 fndds->nfsdev_mdsfsid.val[0] && 8496 ds->nfsdev_mdsfsid.val[1] == 8497 fndds->nfsdev_mdsfsid.val[1]) { 8498 fndmirror = 1; 8499 break; 8500 } 8501 } 8502 } 8503 if (fndmirror == 0) { 8504 NFSD_DEBUG(4, "nfsrv_findmirroredds: no mirror for DS\n"); 8505 return (NULL); 8506 } 8507 return (fndds); 8508 } 8509 8510