1 /* 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Rick Macklem at The University of Guelph. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#)nfs_syscalls.c 8.5 (Berkeley) 3/30/95 33 * $FreeBSD: src/sys/nfs/nfs_syscalls.c,v 1.58.2.1 2000/11/26 02:30:06 dillon Exp $ 34 */ 35 36 #include <sys/param.h> 37 #include <sys/systm.h> 38 #include <sys/sysmsg.h> 39 #include <sys/kernel.h> 40 #include <sys/sysctl.h> 41 #include <sys/file.h> 42 #include <sys/filedesc.h> 43 #include <sys/vnode.h> 44 #include <sys/malloc.h> 45 #include <sys/mount.h> 46 #include <sys/proc.h> 47 #include <sys/caps.h> 48 #include <sys/buf.h> 49 #include <sys/mbuf.h> 50 #include <sys/resourcevar.h> 51 #include <sys/socket.h> 52 #include <sys/socketvar.h> 53 #include <sys/domain.h> 54 #include <sys/protosw.h> 55 #include <sys/nlookup.h> 56 57 #include <sys/mutex2.h> 58 #include <sys/thread2.h> 59 60 #include <netinet/in.h> 61 #include <netinet/tcp.h> 62 #include "xdr_subs.h" 63 #include "rpcv2.h" 64 #include "nfsproto.h" 65 #include "nfs.h" 66 #include "nfsm_subs.h" 67 #include "nfsrvcache.h" 68 #include "nfsmount.h" 69 #include "nfsnode.h" 70 #include "nfsrtt.h" 71 72 static MALLOC_DEFINE(M_NFSSVC, "NFS srvsock", "Nfs server structure"); 73 74 static int nuidhash_max = NFS_MAXUIDHASH; 75 76 #ifndef NFS_NOSERVER 77 static void nfsrv_zapsock (struct nfssvc_sock *slp); 78 #endif 79 80 #define TRUE 1 81 #define FALSE 0 82 83 SYSCTL_DECL(_vfs_nfs); 84 85 #ifndef NFS_NOSERVER 86 int nfsd_waiting = 0; 87 static struct nfsdrt nfsdrt; 88 static int nfs_numnfsd = 0; 89 static void nfsd_rt (int sotype, struct nfsrv_descript *nd, 90 int cacherep); 91 static int nfssvc_addsock (struct file *, struct sockaddr *, 92 struct thread *); 93 static int nfssvc_nfsd (struct nfsd_srvargs *,caddr_t,struct thread *); 94 95 static int nfs_privport = 0; 96 SYSCTL_INT(_vfs_nfs, NFS_NFSPRIVPORT, nfs_privport, CTLFLAG_RW, &nfs_privport, 97 0, "Enable privileged source port checks"); 98 SYSCTL_INT(_vfs_nfs, OID_AUTO, gatherdelay, CTLFLAG_RW, &nfsrvw_procrastinate, 0, 99 "Enable NFS request procrastination"); 100 SYSCTL_INT(_vfs_nfs, OID_AUTO, gatherdelay_v3, CTLFLAG_RW, &nfsrvw_procrastinate_v3, 0, 101 "Enable NFSv3 request procrastination"); 102 int nfs_soreserve = NFS_MAXPACKET * NFS_MAXASYNCBIO; 103 SYSCTL_INT(_vfs_nfs, OID_AUTO, soreserve, CTLFLAG_RW, &nfs_soreserve, 0, 104 "Minimum NFS socket buffer size reservation"); 105 106 /* 107 * NFS server system calls 108 */ 109 110 #endif /* NFS_NOSERVER */ 111 /* 112 * nfssvc_args(int flag, caddr_t argp) 113 * 114 * Nfs server psuedo system call for the nfsd's 115 * Based on the flag value it either: 116 * - adds a socket to the selection list 117 * - remains in the kernel as an nfsd 118 * - remains in the kernel as an nfsiod 119 * 120 * MPALMOSTSAFE 121 */ 122 int 123 sys_nfssvc(struct sysmsg *sysmsg, const struct nfssvc_args *uap) 124 { 125 #ifndef NFS_NOSERVER 126 struct nlookupdata nd; 127 struct file *fp; 128 struct sockaddr *nam; 129 struct nfsd_args nfsdarg; 130 struct nfsd_srvargs nfsd_srvargs, *nsd = &nfsd_srvargs; 131 struct nfsd_cargs ncd; 132 struct nfsd *nfsd; 133 struct nfssvc_sock *slp; 134 struct nfsuid *nuidp; 135 struct nfsmount *nmp; 136 struct vnode *vp; 137 #endif /* NFS_NOSERVER */ 138 int error; 139 struct thread *td = curthread; 140 141 /* 142 * Must be super user 143 */ 144 error = caps_priv_check_td(td, SYSCAP_RESTRICTEDROOT); 145 if (error) 146 return (error); 147 148 lwkt_gettoken(&nfs_token); 149 150 while (nfssvc_sockhead_flag & SLP_INIT) { 151 nfssvc_sockhead_flag |= SLP_WANTINIT; 152 tsleep((caddr_t)&nfssvc_sockhead, 0, "nfsd init", 0); 153 } 154 if (uap->flag & NFSSVC_BIOD) 155 error = ENXIO; /* no longer need nfsiod's */ 156 #ifdef NFS_NOSERVER 157 else 158 error = ENXIO; 159 #else /* !NFS_NOSERVER */ 160 else if (uap->flag & NFSSVC_MNTD) { 161 error = copyin(uap->argp, (caddr_t)&ncd, sizeof (ncd)); 162 if (error) 163 goto done; 164 vp = NULL; 165 error = nlookup_init(&nd, ncd.ncd_dirp, UIO_USERSPACE, 166 NLC_FOLLOW); 167 if (error == 0) 168 error = nlookup(&nd); 169 if (error == 0) 170 error = cache_vget(&nd.nl_nch, nd.nl_cred, LK_EXCLUSIVE, &vp); 171 nlookup_done(&nd); 172 if (error) 173 goto done; 174 175 if ((vp->v_flag & VROOT) == 0) 176 error = EINVAL; 177 nmp = VFSTONFS(vp->v_mount); 178 vput(vp); 179 if (error) 180 goto done; 181 if ((nmp->nm_state & NFSSTA_MNTD) && 182 (uap->flag & NFSSVC_GOTAUTH) == 0) { 183 error = 0; 184 goto done; 185 } 186 nmp->nm_state |= NFSSTA_MNTD; 187 error = nfs_clientd(nmp, td->td_ucred, &ncd, uap->flag, 188 uap->argp, td); 189 } else if (uap->flag & NFSSVC_ADDSOCK) { 190 error = copyin(uap->argp, (caddr_t)&nfsdarg, sizeof(nfsdarg)); 191 if (error) 192 goto done; 193 error = holdsock(td, nfsdarg.sock, &fp); 194 if (error) 195 goto done; 196 /* 197 * Get the client address for connected sockets. 198 */ 199 if (nfsdarg.name == NULL || nfsdarg.namelen == 0) 200 nam = NULL; 201 else { 202 error = getsockaddr(&nam, nfsdarg.name, 203 nfsdarg.namelen); 204 if (error) { 205 fdrop(fp); 206 goto done; 207 } 208 } 209 error = nfssvc_addsock(fp, nam, td); 210 fdrop(fp); 211 } else { 212 error = copyin(uap->argp, (caddr_t)nsd, sizeof (*nsd)); 213 if (error) 214 goto done; 215 if ((uap->flag & NFSSVC_AUTHIN) && 216 ((nfsd = nsd->nsd_nfsd)) != NULL && 217 (nfsd->nfsd_slp->ns_flag & SLP_VALID)) { 218 slp = nfsd->nfsd_slp; 219 220 /* 221 * First check to see if another nfsd has already 222 * added this credential. 223 */ 224 for (nuidp = NUIDHASH(slp,nsd->nsd_cr.cr_uid)->lh_first; 225 nuidp != 0; nuidp = nuidp->nu_hash.le_next) { 226 if (nuidp->nu_cr.cr_uid == nsd->nsd_cr.cr_uid && 227 (!nfsd->nfsd_nd->nd_nam2 || 228 netaddr_match(AF_INET, 229 &nuidp->nu_haddr, nfsd->nfsd_nd->nd_nam2))) 230 break; 231 } 232 if (nuidp) { 233 nfsrv_setcred(&nuidp->nu_cr,&nfsd->nfsd_nd->nd_cr); 234 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL; 235 } else { 236 /* 237 * Nope, so we will. 238 */ 239 if (slp->ns_numuids < nuidhash_max) { 240 slp->ns_numuids++; 241 nuidp = (struct nfsuid *) 242 kmalloc(sizeof (struct nfsuid), M_NFSUID, 243 M_WAITOK); 244 } else 245 nuidp = NULL; 246 if ((slp->ns_flag & SLP_VALID) == 0) { 247 if (nuidp) 248 kfree((caddr_t)nuidp, M_NFSUID); 249 } else { 250 if (nuidp == NULL) { 251 nuidp = TAILQ_FIRST(&slp->ns_uidlruhead); 252 LIST_REMOVE(nuidp, nu_hash); 253 TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, 254 nu_lru); 255 if (nuidp->nu_flag & NU_NAM) 256 kfree(nuidp->nu_nam, M_SONAME); 257 } 258 nuidp->nu_flag = 0; 259 nuidp->nu_cr = nsd->nsd_cr; 260 if (nuidp->nu_cr.cr_ngroups > NGROUPS) 261 nuidp->nu_cr.cr_ngroups = NGROUPS; 262 nuidp->nu_cr.cr_ref = 1; 263 nuidp->nu_timestamp = nsd->nsd_timestamp; 264 nuidp->nu_expire = time_uptime + nsd->nsd_ttl; 265 /* 266 * and save the session key in nu_key. 267 */ 268 bcopy(nsd->nsd_key, nuidp->nu_key, 269 sizeof (nsd->nsd_key)); 270 if (nfsd->nfsd_nd->nd_nam2) { 271 struct sockaddr_in *saddr; 272 273 saddr = (struct sockaddr_in *) 274 nfsd->nfsd_nd->nd_nam2; 275 switch (saddr->sin_family) { 276 case AF_INET: 277 nuidp->nu_flag |= NU_INETADDR; 278 nuidp->nu_inetaddr = 279 saddr->sin_addr.s_addr; 280 break; 281 default: 282 nuidp->nu_flag |= NU_NAM; 283 nuidp->nu_nam = 284 dup_sockaddr(nfsd->nfsd_nd->nd_nam2); 285 break; 286 }; 287 } 288 TAILQ_INSERT_TAIL(&slp->ns_uidlruhead, nuidp, 289 nu_lru); 290 LIST_INSERT_HEAD(NUIDHASH(slp, nsd->nsd_uid), 291 nuidp, nu_hash); 292 nfsrv_setcred(&nuidp->nu_cr, 293 &nfsd->nfsd_nd->nd_cr); 294 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL; 295 } 296 } 297 } 298 if ((uap->flag & NFSSVC_AUTHINFAIL) && (nfsd = nsd->nsd_nfsd)) 299 nfsd->nfsd_flag |= NFSD_AUTHFAIL; 300 error = nfssvc_nfsd(nsd, uap->argp, td); 301 } 302 #endif /* NFS_NOSERVER */ 303 if (error == EINTR || error == ERESTART) 304 error = 0; 305 done: 306 lwkt_reltoken(&nfs_token); 307 return (error); 308 } 309 310 #ifndef NFS_NOSERVER 311 /* 312 * Adds a socket to the list for servicing by nfsds. 313 */ 314 static int 315 nfssvc_addsock(struct file *fp, struct sockaddr *mynam, struct thread *td) 316 { 317 int siz; 318 struct nfssvc_sock *slp; 319 struct socket *so; 320 int error; 321 322 so = (struct socket *)fp->f_data; 323 #if 0 324 tslp = NULL; 325 /* 326 * Add it to the list, as required. 327 */ 328 if (so->so_proto->pr_protocol == IPPROTO_UDP) { 329 tslp = nfs_udpsock; 330 if (tslp->ns_flag & SLP_VALID) { 331 if (mynam != NULL) 332 kfree(mynam, M_SONAME); 333 return (EPERM); 334 } 335 } 336 #endif 337 /* 338 * Reserve buffer space in the socket. Note that due to bugs in 339 * Linux's delayed-ack code, serious performance degredation may 340 * occur with linux hosts if the minimum is used. 341 * 342 * NFS sockets are not limited to the standard sb_max or by 343 * resource limits. 344 */ 345 if (so->so_type == SOCK_STREAM) 346 siz = NFS_MAXPACKET + sizeof (u_long); 347 else 348 siz = NFS_MAXPACKET; 349 if (siz < nfs_soreserve) 350 siz = nfs_soreserve; 351 352 error = soreserve(so, siz, siz, NULL); 353 if (error) { 354 if (mynam != NULL) 355 kfree(mynam, M_SONAME); 356 return (error); 357 } 358 359 /* 360 * Set protocol specific options { for now TCP only } and 361 * reserve some space. For datagram sockets, this can get called 362 * repeatedly for the same socket, but that isn't harmful. 363 */ 364 if (so->so_type == SOCK_STREAM) { 365 struct sockopt sopt; 366 int val; 367 368 bzero(&sopt, sizeof sopt); 369 sopt.sopt_level = SOL_SOCKET; 370 sopt.sopt_name = SO_KEEPALIVE; 371 sopt.sopt_val = &val; 372 sopt.sopt_valsize = sizeof val; 373 val = 1; 374 sosetopt(so, &sopt); 375 } 376 if (so->so_proto->pr_domain->dom_family == AF_INET && 377 so->so_proto->pr_protocol == IPPROTO_TCP) { 378 struct sockopt sopt; 379 int val; 380 381 bzero(&sopt, sizeof sopt); 382 sopt.sopt_level = IPPROTO_TCP; 383 sopt.sopt_name = TCP_NODELAY; 384 sopt.sopt_val = &val; 385 sopt.sopt_valsize = sizeof val; 386 val = 1; 387 sosetopt(so, &sopt); 388 389 bzero(&sopt, sizeof sopt); 390 sopt.sopt_level = IPPROTO_TCP; 391 sopt.sopt_name = TCP_FASTKEEP; 392 sopt.sopt_val = &val; 393 sopt.sopt_valsize = sizeof val; 394 val = 1; 395 sosetopt(so, &sopt); 396 } 397 atomic_clear_int(&so->so_rcv.ssb_flags, SSB_NOINTR); 398 so->so_rcv.ssb_timeo = 0; 399 atomic_clear_int(&so->so_snd.ssb_flags, SSB_NOINTR); 400 so->so_snd.ssb_timeo = 0; 401 402 /* 403 * Clear AUTOSIZE, otherwise the socket buffer could be reduced 404 * to the point where rpc's cannot be queued using the mbuf 405 * interface. 406 */ 407 atomic_clear_int(&so->so_rcv.ssb_flags, SSB_AUTOSIZE); 408 atomic_clear_int(&so->so_snd.ssb_flags, SSB_AUTOSIZE); 409 410 slp = kmalloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK | M_ZERO); 411 mtx_init(&slp->ns_solock, "nfsvc"); 412 STAILQ_INIT(&slp->ns_rec); 413 TAILQ_INIT(&slp->ns_uidlruhead); 414 lwkt_token_init(&slp->ns_token, "nfssrv_token"); 415 416 lwkt_gettoken(&nfs_token); 417 nfsrv_slpref(slp); 418 TAILQ_INSERT_TAIL(&nfssvc_sockhead, slp, ns_chain); 419 lwkt_gettoken(&slp->ns_token); 420 421 slp->ns_so = so; 422 slp->ns_nam = mynam; 423 fhold(fp); 424 slp->ns_fp = fp; 425 426 so->so_upcallarg = (caddr_t)slp; 427 so->so_upcall = nfsrv_rcv_upcall; 428 atomic_set_int(&so->so_rcv.ssb_flags, SSB_UPCALL); 429 slp->ns_flag = (SLP_VALID | SLP_NEEDQ); 430 nfsrv_wakenfsd(slp, 1); 431 432 lwkt_reltoken(&slp->ns_token); 433 lwkt_reltoken(&nfs_token); 434 435 return (0); 436 } 437 438 /* 439 * Called by nfssvc() for nfsds. Just loops around servicing rpc requests 440 * until it is killed by a signal. 441 */ 442 static int 443 nfssvc_nfsd(struct nfsd_srvargs *nsd, caddr_t argp, struct thread *td) 444 { 445 int siz; 446 struct nfssvc_sock *slp; 447 struct nfsd *nfsd = nsd->nsd_nfsd; 448 struct nfsrv_descript *nd = NULL; 449 struct mbuf *m, *mreq; 450 int error, cacherep, sotype, writes_todo; 451 int procrastinate; 452 int slplocked; 453 u_quad_t cur_usec; 454 455 #ifndef nolint 456 cacherep = RC_DOIT; 457 writes_todo = 0; 458 #endif 459 lwkt_gettoken(&nfs_token); 460 461 if (nfsd == NULL) { 462 nsd->nsd_nfsd = nfsd = (struct nfsd *) 463 kmalloc(sizeof (struct nfsd), M_NFSD, M_WAITOK|M_ZERO); 464 nfsd->nfsd_td = td; 465 TAILQ_INSERT_TAIL(&nfsd_head, nfsd, nfsd_chain); 466 nfs_numnfsd++; 467 } 468 469 /* 470 * Loop getting rpc requests until SIGKILL. 471 */ 472 for (;;) { 473 if ((nfsd->nfsd_flag & NFSD_REQINPROG) == 0) { 474 while (nfsd->nfsd_slp == NULL && 475 (nfsd_head_flag & NFSD_CHECKSLP) == 0) { 476 nfsd->nfsd_flag |= NFSD_WAITING; 477 nfsd_waiting++; 478 error = tsleep(nfsd, PCATCH, "nfsd", 0); 479 nfsd_waiting--; 480 if (error && nfsd->nfsd_slp == NULL) 481 goto done; 482 } 483 if (nfsd->nfsd_slp == NULL && 484 (nfsd_head_flag & NFSD_CHECKSLP)) { 485 TAILQ_FOREACH(slp, &nfssvc_sockhead, ns_chain) { 486 if ((slp->ns_flag & SLP_ACTION_MASK) || 487 slp->ns_needq_upcall) { 488 nfsrv_slpref(slp); 489 nfsd->nfsd_slp = slp; 490 break; 491 } 492 } 493 if (slp == NULL) 494 nfsd_head_flag &= ~NFSD_CHECKSLP; 495 } 496 if ((slp = nfsd->nfsd_slp) == NULL) 497 continue; 498 499 lwkt_reltoken(&nfs_token); 500 lwkt_gettoken(&slp->ns_token); 501 502 if (slp->ns_needq_upcall) { 503 slp->ns_needq_upcall = 0; 504 slp->ns_flag |= SLP_NEEDQ; 505 } 506 507 if (slp->ns_flag & SLP_VALID) { 508 /* 509 * We can both process additional received 510 * data into new records and process existing 511 * records. This keeps the pipeline hot by 512 * allowing the tcp socket to continue to 513 * drain while we are processing records. 514 */ 515 while (slp->ns_flag & (SLP_DISCONN|SLP_NEEDQ)) { 516 if (slp->ns_flag & SLP_DISCONN) { 517 nfsrv_zapsock(slp); 518 break; 519 } 520 if (slp->ns_flag & SLP_NEEDQ) { 521 nfs_slplock(slp, 1); 522 if ((slp->ns_flag & 523 SLP_NEEDQ) == 0) { 524 nfs_slpunlock(slp); 525 continue; 526 } 527 nfsrv_rcv(slp->ns_so, 528 (caddr_t)slp, 529 M_WAITOK); 530 nfs_slpunlock(slp); 531 break; 532 } 533 } 534 error = nfsrv_dorec(slp, nfsd, &nd); 535 cur_usec = nfs_curusec(); 536 if (error && slp->ns_tq.lh_first && 537 slp->ns_tq.lh_first->nd_time <= cur_usec) { 538 error = 0; 539 cacherep = RC_DOIT; 540 writes_todo = 1; 541 } else { 542 writes_todo = 0; 543 } 544 nfsd->nfsd_flag |= NFSD_REQINPROG; 545 } else { 546 slp->ns_flag &= ~SLP_ACTION_MASK; 547 error = 0; 548 } 549 } else { 550 error = 0; 551 slp = nfsd->nfsd_slp; 552 553 lwkt_reltoken(&nfs_token); 554 lwkt_gettoken(&slp->ns_token); 555 556 if (slp->ns_needq_upcall) { 557 slp->ns_needq_upcall = 0; 558 slp->ns_flag |= SLP_NEEDQ; 559 } 560 if (NFSRV_RECLIMIT(slp) == 0 && 561 (slp->ns_flag & SLP_NEEDQ)) { 562 nfs_slplock(slp, 1); 563 if (NFSRV_RECLIMIT(slp) == 0 && 564 (slp->ns_flag & SLP_NEEDQ)) { 565 nfsrv_rcv(slp->ns_so, (caddr_t)slp, 566 M_WAITOK); 567 } 568 nfs_slpunlock(slp); 569 } 570 } 571 572 /* 573 * nfs_token not held here. slp token is held. 574 */ 575 if (error || (slp->ns_flag & SLP_VALID) == 0) { 576 if (nd) { 577 kfree((caddr_t)nd, M_NFSRVDESC); 578 nd = NULL; 579 } 580 nfsd->nfsd_flag &= ~NFSD_REQINPROG; 581 if (slp->ns_flag & SLP_ACTION_MASK) { 582 lwkt_reltoken(&slp->ns_token); 583 lwkt_gettoken(&nfs_token); 584 } else { 585 nfsd->nfsd_slp = NULL; 586 lwkt_reltoken(&slp->ns_token); 587 lwkt_gettoken(&nfs_token); 588 nfsrv_slpderef(slp); 589 } 590 continue; 591 } 592 sotype = slp->ns_so->so_type; 593 594 /* 595 * Execute the NFS request - handle the server side cache 596 * 597 * nfs_token not held here. slp token is held. 598 */ 599 if (nd) { 600 getmicrotime(&nd->nd_starttime); 601 if (nd->nd_nam2) 602 nd->nd_nam = nd->nd_nam2; 603 else 604 nd->nd_nam = slp->ns_nam; 605 606 /* 607 * Check to see if authorization is needed. 608 */ 609 if (nfsd->nfsd_flag & NFSD_NEEDAUTH) { 610 nfsd->nfsd_flag &= ~NFSD_NEEDAUTH; 611 nsd->nsd_haddr = 612 ((struct sockaddr_in *) 613 nd->nd_nam)->sin_addr.s_addr; 614 nsd->nsd_authlen = nfsd->nfsd_authlen; 615 nsd->nsd_verflen = nfsd->nfsd_verflen; 616 if (!copyout(nfsd->nfsd_authstr,nsd->nsd_authstr, 617 nfsd->nfsd_authlen) && 618 !copyout(nfsd->nfsd_verfstr, nsd->nsd_verfstr, 619 nfsd->nfsd_verflen) && 620 !copyout((caddr_t)nsd, argp, sizeof (*nsd))) 621 { 622 lwkt_reltoken(&slp->ns_token); 623 return (ENEEDAUTH); 624 } 625 cacherep = RC_DROPIT; 626 } else { 627 cacherep = nfsrv_getcache(nd, slp, &mreq); 628 } 629 630 if (nfsd->nfsd_flag & NFSD_AUTHFAIL) { 631 nfsd->nfsd_flag &= ~NFSD_AUTHFAIL; 632 nd->nd_procnum = NFSPROC_NOOP; 633 nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK); 634 cacherep = RC_DOIT; 635 } else if (nfs_privport) { 636 /* Check if source port is privileged */ 637 u_short port; 638 struct sockaddr *nam = nd->nd_nam; 639 struct sockaddr_in *sin; 640 641 sin = (struct sockaddr_in *)nam; 642 port = ntohs(sin->sin_port); 643 if (port >= IPPORT_RESERVED && 644 nd->nd_procnum != NFSPROC_NULL) { 645 char addr[INET_ADDRSTRLEN]; 646 647 nd->nd_procnum = NFSPROC_NOOP; 648 nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK); 649 cacherep = RC_DOIT; 650 kprintf("NFS request from unprivileged port (%s:%d)\n", 651 kinet_ntoa(sin->sin_addr, addr), port); 652 } 653 } 654 } 655 656 /* 657 * Execute the NFS request - direct execution 658 * 659 * Loop to get all the write rpc replies that have been 660 * gathered together. 661 * 662 * nfs_token not held here. slp token is held. 663 */ 664 do { 665 switch (cacherep) { 666 case RC_DOIT: 667 if (nd && (nd->nd_flag & ND_NFSV3)) 668 procrastinate = nfsrvw_procrastinate_v3; 669 else 670 procrastinate = nfsrvw_procrastinate; 671 if (writes_todo || (nd->nd_procnum == NFSPROC_WRITE && 672 procrastinate > 0) 673 ) { 674 error = nfsrv_writegather(&nd, slp, 675 nfsd->nfsd_td, &mreq); 676 } else { 677 /* NOT YET lwkt_reltoken(&slp->ns_token); */ 678 error = (*(nfsrv3_procs[nd->nd_procnum]))(nd, 679 slp, nfsd->nfsd_td, &mreq); 680 /* NOT YET lwkt_gettoken(&slp->ns_token); */ 681 lwpkthreaddeferred(); /* vnlru issues */ 682 } 683 if (mreq == NULL) 684 break; 685 if (error != 0 && error != NFSERR_RETVOID) { 686 if (nd->nd_procnum != NQNFSPROC_VACATED) 687 nfsstats.srv_errs++; 688 nfsrv_updatecache(nd, FALSE, mreq); 689 if (nd->nd_nam2) 690 kfree(nd->nd_nam2, M_SONAME); 691 break; 692 } 693 nfsstats.srvrpccnt[nd->nd_procnum]++; 694 nfsrv_updatecache(nd, TRUE, mreq); 695 nd->nd_mrep = NULL; 696 /* FALL THROUGH */ 697 case RC_REPLY: 698 m = mreq; 699 siz = 0; 700 while (m) { 701 siz += m->m_len; 702 m = m->m_next; 703 } 704 if (siz <= 0 || siz > NFS_MAXPACKET) { 705 kprintf("mbuf siz=%d\n",siz); 706 panic("Bad nfs svc reply"); 707 } 708 m = mreq; 709 m->m_pkthdr.len = siz; 710 m->m_pkthdr.rcvif = NULL; 711 /* 712 * For stream protocols, prepend a Sun RPC 713 * Record Mark. 714 */ 715 if (sotype == SOCK_STREAM) { 716 M_PREPEND(m, NFSX_UNSIGNED, M_WAITOK); 717 *mtod(m, u_int32_t *) = htonl(0x80000000 | siz); 718 } 719 if ((slp->ns_flag & SLP_VALID) && 720 (slp->ns_so->so_proto->pr_flags & PR_CONNREQUIRED)){ 721 nfs_slplock(slp, 1); 722 slplocked = 1; 723 } else { 724 slplocked = 0; 725 } 726 if (slp->ns_flag & SLP_VALID) { 727 error = nfs_send(slp->ns_so, nd->nd_nam2, m, NULL); 728 } else { 729 error = EPIPE; 730 m_freem(m); 731 } 732 if (nfsrtton) 733 nfsd_rt(sotype, nd, cacherep); 734 if (nd->nd_nam2) 735 kfree(nd->nd_nam2, M_SONAME); 736 if (nd->nd_mrep) 737 m_freem(nd->nd_mrep); 738 if (error == EPIPE || error == ENOBUFS) 739 nfsrv_zapsock(slp); 740 if (slplocked) 741 nfs_slpunlock(slp); 742 if (error == EINTR || error == ERESTART) { 743 kfree((caddr_t)nd, M_NFSRVDESC); 744 lwkt_reltoken(&slp->ns_token); 745 lwkt_gettoken(&nfs_token); 746 nfsd->nfsd_slp = NULL; 747 nfsrv_slpderef(slp); 748 goto done; 749 } 750 break; 751 case RC_DROPIT: 752 if (nfsrtton) 753 nfsd_rt(sotype, nd, cacherep); 754 m_freem(nd->nd_mrep); 755 if (nd->nd_nam2) 756 kfree(nd->nd_nam2, M_SONAME); 757 break; 758 } 759 if (nd) { 760 kfree((caddr_t)nd, M_NFSRVDESC); 761 nd = NULL; 762 } 763 764 /* 765 * Check to see if there are outstanding writes that 766 * need to be serviced. 767 */ 768 cur_usec = nfs_curusec(); 769 if (slp->ns_tq.lh_first && 770 slp->ns_tq.lh_first->nd_time <= cur_usec) { 771 cacherep = RC_DOIT; 772 writes_todo = 1; 773 } else { 774 writes_todo = 0; 775 } 776 } while (writes_todo); 777 778 /* 779 * nfs_token not held here. slp token is held. 780 */ 781 if (nfsrv_dorec(slp, nfsd, &nd)) { 782 nfsd->nfsd_flag &= ~NFSD_REQINPROG; 783 if (slp->ns_flag & SLP_ACTION_MASK) { 784 lwkt_reltoken(&slp->ns_token); 785 lwkt_gettoken(&nfs_token); 786 } else { 787 nfsd->nfsd_slp = NULL; 788 lwkt_reltoken(&slp->ns_token); 789 lwkt_gettoken(&nfs_token); 790 nfsrv_slpderef(slp); 791 } 792 } else { 793 lwkt_reltoken(&slp->ns_token); 794 lwkt_gettoken(&nfs_token); 795 } 796 } 797 done: 798 TAILQ_REMOVE(&nfsd_head, nfsd, nfsd_chain); 799 kfree((caddr_t)nfsd, M_NFSD); 800 nsd->nsd_nfsd = NULL; 801 if (--nfs_numnfsd == 0) 802 nfsrv_init(TRUE); /* Reinitialize everything */ 803 804 lwkt_reltoken(&nfs_token); 805 return (error); 806 } 807 808 /* 809 * Shut down a socket associated with an nfssvc_sock structure. 810 * Should be called with the send lock set, if required. 811 * 812 * The trick here is to increment the sref at the start, so that the nfsds 813 * will stop using it and clear ns_flag at the end so that it will not be 814 * reassigned during cleanup. 815 * 816 * That said, while we shutdown() the socket here, we don't actually destroy 817 * it until the final deref as there might be other code in the middle of 818 * using it. 819 */ 820 static void 821 nfsrv_zapsock(struct nfssvc_sock *slp) 822 { 823 struct nfsuid *nuidp, *nnuidp; 824 struct nfsrv_descript *nwp, *nnwp; 825 struct socket *so; 826 struct nfsrv_rec *rec; 827 int wasvalid; 828 829 wasvalid = slp->ns_flag & SLP_VALID; 830 slp->ns_flag &= ~SLP_ALLFLAGS; 831 if (wasvalid && slp->ns_fp) { 832 so = slp->ns_so; 833 atomic_clear_int(&so->so_rcv.ssb_flags, SSB_UPCALL); 834 so->so_upcall = NULL; 835 so->so_upcallarg = NULL; 836 soshutdown(so, SHUT_RDWR); 837 if (slp->ns_nam) { 838 kfree(slp->ns_nam, M_SONAME); 839 slp->ns_nam = NULL; 840 } 841 842 m_freem(slp->ns_raw); 843 slp->ns_raw = NULL; 844 845 while ((rec = STAILQ_FIRST(&slp->ns_rec)) != NULL) { 846 --slp->ns_numrec; 847 STAILQ_REMOVE_HEAD(&slp->ns_rec, nr_link); 848 if (rec->nr_address) 849 kfree(rec->nr_address, M_SONAME); 850 m_freem(rec->nr_packet); 851 kfree(rec, M_NFSRVDESC); 852 } 853 KKASSERT(slp->ns_numrec == 0); 854 855 TAILQ_FOREACH_MUTABLE(nuidp, &slp->ns_uidlruhead, nu_lru, 856 nnuidp) { 857 LIST_REMOVE(nuidp, nu_hash); 858 TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, nu_lru); 859 if (nuidp->nu_flag & NU_NAM) 860 kfree(nuidp->nu_nam, M_SONAME); 861 kfree((caddr_t)nuidp, M_NFSUID); 862 } 863 crit_enter(); /* XXX doesn't do anything any more */ 864 for (nwp = slp->ns_tq.lh_first; nwp; nwp = nnwp) { 865 nnwp = nwp->nd_tq.le_next; 866 LIST_REMOVE(nwp, nd_tq); 867 kfree((caddr_t)nwp, M_NFSRVDESC); 868 } 869 LIST_INIT(&slp->ns_tq); 870 crit_exit(); 871 872 nfsrv_slpderef(slp); 873 } 874 } 875 876 /* 877 * Derefence a server socket structure. If it has no more references and 878 * is no longer valid, you can throw it away. 879 * 880 * Must be holding nfs_token! 881 */ 882 void 883 nfsrv_slpderef(struct nfssvc_sock *slp) 884 { 885 struct file *fp; 886 887 ASSERT_LWKT_TOKEN_HELD(&nfs_token); 888 if (slp->ns_sref == 1) { 889 KKASSERT((slp->ns_flag & SLP_VALID) == 0); 890 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain); 891 slp->ns_sref = 0; 892 fp = slp->ns_fp; 893 slp->ns_fp = NULL; 894 slp->ns_so = NULL; 895 if (fp) 896 closef(fp, NULL); 897 kfree((caddr_t)slp, M_NFSSVC); 898 } else { 899 --slp->ns_sref; 900 } 901 } 902 903 void 904 nfsrv_slpref(struct nfssvc_sock *slp) 905 { 906 ASSERT_LWKT_TOKEN_HELD(&nfs_token); 907 ++slp->ns_sref; 908 } 909 910 /* 911 * Lock a socket against others. 912 * 913 * Returns 0 on failure, 1 on success. 914 */ 915 int 916 nfs_slplock(struct nfssvc_sock *slp, int wait) 917 { 918 mtx_t *mtx = &slp->ns_solock; 919 920 if (wait) { 921 mtx_lock_ex(mtx, 0, 0); 922 return(1); 923 } else if (mtx_lock_ex_try(mtx) == 0) { 924 return(1); 925 } else { 926 return(0); 927 } 928 } 929 930 /* 931 * Unlock the stream socket for others. 932 */ 933 void 934 nfs_slpunlock(struct nfssvc_sock *slp) 935 { 936 mtx_t *mtx = &slp->ns_solock; 937 938 mtx_unlock(mtx); 939 } 940 941 /* 942 * Initialize the data structures for the server. 943 * Handshake with any new nfsds starting up to avoid any chance of 944 * corruption. 945 */ 946 void 947 nfsrv_init(int terminating) 948 { 949 struct nfssvc_sock *slp, *nslp; 950 951 lwkt_gettoken(&nfs_token); 952 if (nfssvc_sockhead_flag & SLP_INIT) 953 panic("nfsd init"); 954 nfssvc_sockhead_flag |= SLP_INIT; 955 956 if (terminating) { 957 TAILQ_FOREACH_MUTABLE(slp, &nfssvc_sockhead, ns_chain, nslp) { 958 nfsrv_slpref(slp); 959 lwkt_gettoken(&slp->ns_token); 960 if (slp->ns_flag & SLP_VALID) 961 nfsrv_zapsock(slp); 962 lwkt_reltoken(&slp->ns_token); 963 nfsrv_slpderef(slp); 964 } 965 nfsrv_cleancache(); /* And clear out server cache */ 966 } else { 967 nfs_pub.np_valid = 0; 968 } 969 970 TAILQ_INIT(&nfssvc_sockhead); 971 nfssvc_sockhead_flag &= ~SLP_INIT; 972 if (nfssvc_sockhead_flag & SLP_WANTINIT) { 973 nfssvc_sockhead_flag &= ~SLP_WANTINIT; 974 wakeup((caddr_t)&nfssvc_sockhead); 975 } 976 977 TAILQ_INIT(&nfsd_head); 978 nfsd_head_flag &= ~NFSD_CHECKSLP; 979 980 lwkt_reltoken(&nfs_token); 981 982 #if 0 983 nfs_udpsock = (struct nfssvc_sock *) 984 kmalloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK | M_ZERO); 985 mtx_init(&nfs_udpsock->ns_solock); 986 STAILQ_INIT(&nfs_udpsock->ns_rec); 987 TAILQ_INIT(&nfs_udpsock->ns_uidlruhead); 988 TAILQ_INSERT_HEAD(&nfssvc_sockhead, nfs_udpsock, ns_chain); 989 990 nfs_cltpsock = (struct nfssvc_sock *) 991 kmalloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK | M_ZERO); 992 mtx_init(&nfs_cltpsock->ns_solock); 993 STAILQ_INIT(&nfs_cltpsock->ns_rec); 994 TAILQ_INIT(&nfs_cltpsock->ns_uidlruhead); 995 TAILQ_INSERT_TAIL(&nfssvc_sockhead, nfs_cltpsock, ns_chain); 996 #endif 997 } 998 999 /* 1000 * Add entries to the server monitor log. 1001 */ 1002 static void 1003 nfsd_rt(int sotype, struct nfsrv_descript *nd, int cacherep) 1004 { 1005 struct drt *rt; 1006 1007 rt = &nfsdrt.drt[nfsdrt.pos]; 1008 if (cacherep == RC_DOIT) 1009 rt->flag = 0; 1010 else if (cacherep == RC_REPLY) 1011 rt->flag = DRT_CACHEREPLY; 1012 else 1013 rt->flag = DRT_CACHEDROP; 1014 if (sotype == SOCK_STREAM) 1015 rt->flag |= DRT_TCP; 1016 if (nd->nd_flag & ND_NFSV3) 1017 rt->flag |= DRT_NFSV3; 1018 rt->proc = nd->nd_procnum; 1019 if (nd->nd_nam->sa_family == AF_INET) 1020 rt->ipadr = ((struct sockaddr_in *)nd->nd_nam)->sin_addr.s_addr; 1021 else 1022 rt->ipadr = INADDR_ANY; 1023 rt->resptime = nfs_curusec() - (nd->nd_starttime.tv_sec * 1000000 + nd->nd_starttime.tv_usec); 1024 getmicrotime(&rt->tstamp); 1025 nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ; 1026 } 1027 #endif /* NFS_NOSERVER */ 1028 1029 /* 1030 * Get an authorization string for the uid by having the mount_nfs sitting 1031 * on this mount point porpous out of the kernel and do it. 1032 */ 1033 int 1034 nfs_getauth(struct nfsmount *nmp, struct nfsreq *rep, 1035 struct ucred *cred, char **auth_str, int *auth_len, char *verf_str, 1036 int *verf_len, NFSKERBKEY_T key /* return session key */) 1037 { 1038 int error = 0; 1039 1040 while ((nmp->nm_state & NFSSTA_WAITAUTH) == 0) { 1041 nmp->nm_state |= NFSSTA_WANTAUTH; 1042 (void) tsleep((caddr_t)&nmp->nm_authtype, 0, 1043 "nfsauth1", 2 * hz); 1044 error = nfs_sigintr(nmp, rep, rep->r_td); 1045 if (error) { 1046 nmp->nm_state &= ~NFSSTA_WANTAUTH; 1047 return (error); 1048 } 1049 } 1050 nmp->nm_state &= ~(NFSSTA_WAITAUTH | NFSSTA_WANTAUTH); 1051 nmp->nm_authstr = *auth_str = (char *)kmalloc(RPCAUTH_MAXSIZ, M_TEMP, M_WAITOK); 1052 nmp->nm_authlen = RPCAUTH_MAXSIZ; 1053 nmp->nm_verfstr = verf_str; 1054 nmp->nm_verflen = *verf_len; 1055 nmp->nm_authuid = cred->cr_uid; 1056 wakeup((caddr_t)&nmp->nm_authstr); 1057 1058 /* 1059 * And wait for mount_nfs to do its stuff. 1060 */ 1061 while ((nmp->nm_state & NFSSTA_HASAUTH) == 0 && error == 0) { 1062 (void) tsleep((caddr_t)&nmp->nm_authlen, 0, 1063 "nfsauth2", 2 * hz); 1064 error = nfs_sigintr(nmp, rep, rep->r_td); 1065 } 1066 if (nmp->nm_state & NFSSTA_AUTHERR) { 1067 nmp->nm_state &= ~NFSSTA_AUTHERR; 1068 error = EAUTH; 1069 } 1070 if (error) 1071 kfree((caddr_t)*auth_str, M_TEMP); 1072 else { 1073 *auth_len = nmp->nm_authlen; 1074 *verf_len = nmp->nm_verflen; 1075 bcopy((caddr_t)nmp->nm_key, (caddr_t)key, sizeof (NFSKERBKEY_T)); 1076 } 1077 nmp->nm_state &= ~NFSSTA_HASAUTH; 1078 nmp->nm_state |= NFSSTA_WAITAUTH; 1079 if (nmp->nm_state & NFSSTA_WANTAUTH) { 1080 nmp->nm_state &= ~NFSSTA_WANTAUTH; 1081 wakeup((caddr_t)&nmp->nm_authtype); 1082 } 1083 return (error); 1084 } 1085 1086 /* 1087 * Get a nickname authenticator and verifier. 1088 */ 1089 int 1090 nfs_getnickauth(struct nfsmount *nmp, struct ucred *cred, char **auth_str, 1091 int *auth_len, char *verf_str, int verf_len) 1092 { 1093 struct nfsuid *nuidp; 1094 u_int32_t *nickp, *verfp; 1095 struct timeval ktvout; 1096 1097 #ifdef DIAGNOSTIC 1098 if (verf_len < (4 * NFSX_UNSIGNED)) 1099 panic("nfs_getnickauth verf too small"); 1100 #endif 1101 for (nuidp = NMUIDHASH(nmp, cred->cr_uid)->lh_first; 1102 nuidp != NULL; nuidp = nuidp->nu_hash.le_next) { 1103 if (nuidp->nu_cr.cr_uid == cred->cr_uid) 1104 break; 1105 } 1106 if (!nuidp || nuidp->nu_expire < time_uptime) 1107 return (EACCES); 1108 1109 /* 1110 * Move to the end of the lru list (end of lru == most recently used). 1111 */ 1112 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru); 1113 TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, nu_lru); 1114 1115 nickp = (u_int32_t *)kmalloc(2 * NFSX_UNSIGNED, M_TEMP, M_WAITOK); 1116 *nickp++ = txdr_unsigned(RPCAKN_NICKNAME); 1117 *nickp = txdr_unsigned(nuidp->nu_nickname); 1118 *auth_str = (char *)nickp; 1119 *auth_len = 2 * NFSX_UNSIGNED; 1120 1121 /* 1122 * Now we must encrypt the verifier and package it up. 1123 */ 1124 verfp = (u_int32_t *)verf_str; 1125 *verfp++ = txdr_unsigned(RPCAKN_NICKNAME); 1126 if (time_second != nuidp->nu_timestamp.tv_sec || 1127 time_second > nuidp->nu_timestamp.tv_usec) /* XXX */ 1128 getmicrotime(&nuidp->nu_timestamp); 1129 else 1130 nuidp->nu_timestamp.tv_usec++; 1131 1132 /* 1133 * Now encrypt the timestamp verifier in ecb mode using the session 1134 * key. 1135 */ 1136 #ifdef NFSKERB 1137 XXX 1138 #else 1139 ktvout.tv_sec = 0; 1140 ktvout.tv_usec = 0; 1141 #endif 1142 1143 *verfp++ = ktvout.tv_sec; 1144 *verfp++ = ktvout.tv_usec; 1145 *verfp = 0; 1146 return (0); 1147 } 1148 1149 /* 1150 * Save the current nickname in a hash list entry on the mount point. 1151 */ 1152 int 1153 nfs_savenickauth(struct nfsmount *nmp, struct ucred *cred, int len, 1154 NFSKERBKEY_T key, struct mbuf **mdp, char **dposp, 1155 struct mbuf *mrep) 1156 { 1157 struct nfsuid *nuidp; 1158 u_int32_t *tl; 1159 struct timeval ktvin, ktvout; 1160 u_int32_t nick; 1161 int deltasec, error = 0; 1162 struct nfsm_info info; 1163 1164 info.md = *mdp; 1165 info.dpos = *dposp; 1166 info.mrep = mrep; 1167 1168 if (len == (3 * NFSX_UNSIGNED)) { 1169 NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED)); 1170 ktvin.tv_sec = *tl++; 1171 ktvin.tv_usec = *tl++; 1172 nick = fxdr_unsigned(u_int32_t, *tl); 1173 1174 /* 1175 * Decrypt the timestamp in ecb mode. 1176 */ 1177 #ifdef NFSKERB 1178 XXX 1179 #else 1180 ktvout.tv_sec = 0; 1181 ktvout.tv_usec = 0; 1182 #endif 1183 ktvout.tv_sec = fxdr_unsigned(long, ktvout.tv_sec); 1184 ktvout.tv_usec = fxdr_unsigned(long, ktvout.tv_usec); 1185 deltasec = time_second - ktvout.tv_sec; 1186 if (deltasec < 0) 1187 deltasec = -deltasec; 1188 /* 1189 * If ok, add it to the hash list for the mount point. 1190 */ 1191 if (deltasec <= NFS_KERBCLOCKSKEW) { 1192 if (nmp->nm_numuids < nuidhash_max) { 1193 nmp->nm_numuids++; 1194 nuidp = (struct nfsuid *) 1195 kmalloc(sizeof (struct nfsuid), M_NFSUID, 1196 M_WAITOK); 1197 } else { 1198 nuidp = TAILQ_FIRST(&nmp->nm_uidlruhead); 1199 LIST_REMOVE(nuidp, nu_hash); 1200 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, 1201 nu_lru); 1202 } 1203 nuidp->nu_flag = 0; 1204 nuidp->nu_cr.cr_uid = cred->cr_uid; 1205 nuidp->nu_expire = time_uptime + NFS_KERBTTL; 1206 nuidp->nu_timestamp = ktvout; 1207 nuidp->nu_nickname = nick; 1208 bcopy(key, nuidp->nu_key, sizeof (NFSKERBKEY_T)); 1209 TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, 1210 nu_lru); 1211 LIST_INSERT_HEAD(NMUIDHASH(nmp, cred->cr_uid), 1212 nuidp, nu_hash); 1213 } 1214 } else { 1215 ERROROUT(nfsm_adv(&info, nfsm_rndup(len))); 1216 } 1217 nfsmout: 1218 *mdp = info.md; 1219 *dposp = info.dpos; 1220 return (error); 1221 } 1222