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/sysproto.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/priv.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 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 = priv_check(td, PRIV_ROOT); 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->td_proc->p_fd, 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 nd->nd_procnum = NFSPROC_NOOP; 646 nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK); 647 cacherep = RC_DOIT; 648 kprintf("NFS request from unprivileged port (%s:%d)\n", 649 inet_ntoa(sin->sin_addr), port); 650 } 651 } 652 } 653 654 /* 655 * Execute the NFS request - direct execution 656 * 657 * Loop to get all the write rpc replies that have been 658 * gathered together. 659 * 660 * nfs_token not held here. slp token is held. 661 */ 662 do { 663 switch (cacherep) { 664 case RC_DOIT: 665 if (nd && (nd->nd_flag & ND_NFSV3)) 666 procrastinate = nfsrvw_procrastinate_v3; 667 else 668 procrastinate = nfsrvw_procrastinate; 669 if (writes_todo || (nd->nd_procnum == NFSPROC_WRITE && 670 procrastinate > 0) 671 ) { 672 error = nfsrv_writegather(&nd, slp, 673 nfsd->nfsd_td, &mreq); 674 } else { 675 /* NOT YET lwkt_reltoken(&slp->ns_token); */ 676 error = (*(nfsrv3_procs[nd->nd_procnum]))(nd, 677 slp, nfsd->nfsd_td, &mreq); 678 /* NOT YET lwkt_gettoken(&slp->ns_token); */ 679 lwpkthreaddeferred(); /* vnlru issues */ 680 } 681 if (mreq == NULL) 682 break; 683 if (error != 0 && error != NFSERR_RETVOID) { 684 if (nd->nd_procnum != NQNFSPROC_VACATED) 685 nfsstats.srv_errs++; 686 nfsrv_updatecache(nd, FALSE, mreq); 687 if (nd->nd_nam2) 688 kfree(nd->nd_nam2, M_SONAME); 689 break; 690 } 691 nfsstats.srvrpccnt[nd->nd_procnum]++; 692 nfsrv_updatecache(nd, TRUE, mreq); 693 nd->nd_mrep = NULL; 694 /* FALL THROUGH */ 695 case RC_REPLY: 696 m = mreq; 697 siz = 0; 698 while (m) { 699 siz += m->m_len; 700 m = m->m_next; 701 } 702 if (siz <= 0 || siz > NFS_MAXPACKET) { 703 kprintf("mbuf siz=%d\n",siz); 704 panic("Bad nfs svc reply"); 705 } 706 m = mreq; 707 m->m_pkthdr.len = siz; 708 m->m_pkthdr.rcvif = NULL; 709 /* 710 * For stream protocols, prepend a Sun RPC 711 * Record Mark. 712 */ 713 if (sotype == SOCK_STREAM) { 714 M_PREPEND(m, NFSX_UNSIGNED, M_WAITOK); 715 if (m == NULL) { 716 error = ENOBUFS; 717 slplocked = 0; 718 goto skip; 719 } 720 *mtod(m, u_int32_t *) = htonl(0x80000000 | siz); 721 } 722 if ((slp->ns_flag & SLP_VALID) && 723 (slp->ns_so->so_proto->pr_flags & PR_CONNREQUIRED)){ 724 nfs_slplock(slp, 1); 725 slplocked = 1; 726 } else { 727 slplocked = 0; 728 } 729 if (slp->ns_flag & SLP_VALID) { 730 error = nfs_send(slp->ns_so, nd->nd_nam2, m, NULL); 731 } else { 732 error = EPIPE; 733 m_freem(m); 734 } 735 skip: 736 if (nfsrtton) 737 nfsd_rt(sotype, nd, cacherep); 738 if (nd->nd_nam2) 739 kfree(nd->nd_nam2, M_SONAME); 740 if (nd->nd_mrep) 741 m_freem(nd->nd_mrep); 742 if (error == EPIPE || error == ENOBUFS) 743 nfsrv_zapsock(slp); 744 if (slplocked) 745 nfs_slpunlock(slp); 746 if (error == EINTR || error == ERESTART) { 747 kfree((caddr_t)nd, M_NFSRVDESC); 748 lwkt_reltoken(&slp->ns_token); 749 lwkt_gettoken(&nfs_token); 750 nfsd->nfsd_slp = NULL; 751 nfsrv_slpderef(slp); 752 goto done; 753 } 754 break; 755 case RC_DROPIT: 756 if (nfsrtton) 757 nfsd_rt(sotype, nd, cacherep); 758 m_freem(nd->nd_mrep); 759 if (nd->nd_nam2) 760 kfree(nd->nd_nam2, M_SONAME); 761 break; 762 } 763 if (nd) { 764 kfree((caddr_t)nd, M_NFSRVDESC); 765 nd = NULL; 766 } 767 768 /* 769 * Check to see if there are outstanding writes that 770 * need to be serviced. 771 */ 772 cur_usec = nfs_curusec(); 773 if (slp->ns_tq.lh_first && 774 slp->ns_tq.lh_first->nd_time <= cur_usec) { 775 cacherep = RC_DOIT; 776 writes_todo = 1; 777 } else { 778 writes_todo = 0; 779 } 780 } while (writes_todo); 781 782 /* 783 * nfs_token not held here. slp token is held. 784 */ 785 if (nfsrv_dorec(slp, nfsd, &nd)) { 786 nfsd->nfsd_flag &= ~NFSD_REQINPROG; 787 if (slp->ns_flag & SLP_ACTION_MASK) { 788 lwkt_reltoken(&slp->ns_token); 789 lwkt_gettoken(&nfs_token); 790 } else { 791 nfsd->nfsd_slp = NULL; 792 lwkt_reltoken(&slp->ns_token); 793 lwkt_gettoken(&nfs_token); 794 nfsrv_slpderef(slp); 795 } 796 } else { 797 lwkt_reltoken(&slp->ns_token); 798 lwkt_gettoken(&nfs_token); 799 } 800 } 801 done: 802 TAILQ_REMOVE(&nfsd_head, nfsd, nfsd_chain); 803 kfree((caddr_t)nfsd, M_NFSD); 804 nsd->nsd_nfsd = NULL; 805 if (--nfs_numnfsd == 0) 806 nfsrv_init(TRUE); /* Reinitialize everything */ 807 808 lwkt_reltoken(&nfs_token); 809 return (error); 810 } 811 812 /* 813 * Shut down a socket associated with an nfssvc_sock structure. 814 * Should be called with the send lock set, if required. 815 * 816 * The trick here is to increment the sref at the start, so that the nfsds 817 * will stop using it and clear ns_flag at the end so that it will not be 818 * reassigned during cleanup. 819 * 820 * That said, while we shutdown() the socket here, we don't actually destroy 821 * it until the final deref as there might be other code in the middle of 822 * using it. 823 */ 824 static void 825 nfsrv_zapsock(struct nfssvc_sock *slp) 826 { 827 struct nfsuid *nuidp, *nnuidp; 828 struct nfsrv_descript *nwp, *nnwp; 829 struct socket *so; 830 struct nfsrv_rec *rec; 831 int wasvalid; 832 833 wasvalid = slp->ns_flag & SLP_VALID; 834 slp->ns_flag &= ~SLP_ALLFLAGS; 835 if (wasvalid && slp->ns_fp) { 836 so = slp->ns_so; 837 atomic_clear_int(&so->so_rcv.ssb_flags, SSB_UPCALL); 838 so->so_upcall = NULL; 839 so->so_upcallarg = NULL; 840 soshutdown(so, SHUT_RDWR); 841 if (slp->ns_nam) { 842 kfree(slp->ns_nam, M_SONAME); 843 slp->ns_nam = NULL; 844 } 845 846 m_freem(slp->ns_raw); 847 slp->ns_raw = NULL; 848 849 while ((rec = STAILQ_FIRST(&slp->ns_rec)) != NULL) { 850 --slp->ns_numrec; 851 STAILQ_REMOVE_HEAD(&slp->ns_rec, nr_link); 852 if (rec->nr_address) 853 kfree(rec->nr_address, M_SONAME); 854 m_freem(rec->nr_packet); 855 kfree(rec, M_NFSRVDESC); 856 } 857 KKASSERT(slp->ns_numrec == 0); 858 859 TAILQ_FOREACH_MUTABLE(nuidp, &slp->ns_uidlruhead, nu_lru, 860 nnuidp) { 861 LIST_REMOVE(nuidp, nu_hash); 862 TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, nu_lru); 863 if (nuidp->nu_flag & NU_NAM) 864 kfree(nuidp->nu_nam, M_SONAME); 865 kfree((caddr_t)nuidp, M_NFSUID); 866 } 867 crit_enter(); /* XXX doesn't do anything any more */ 868 for (nwp = slp->ns_tq.lh_first; nwp; nwp = nnwp) { 869 nnwp = nwp->nd_tq.le_next; 870 LIST_REMOVE(nwp, nd_tq); 871 kfree((caddr_t)nwp, M_NFSRVDESC); 872 } 873 LIST_INIT(&slp->ns_tq); 874 crit_exit(); 875 876 nfsrv_slpderef(slp); 877 } 878 } 879 880 /* 881 * Derefence a server socket structure. If it has no more references and 882 * is no longer valid, you can throw it away. 883 * 884 * Must be holding nfs_token! 885 */ 886 void 887 nfsrv_slpderef(struct nfssvc_sock *slp) 888 { 889 struct file *fp; 890 891 ASSERT_LWKT_TOKEN_HELD(&nfs_token); 892 if (slp->ns_sref == 1) { 893 KKASSERT((slp->ns_flag & SLP_VALID) == 0); 894 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain); 895 slp->ns_sref = 0; 896 fp = slp->ns_fp; 897 slp->ns_fp = NULL; 898 slp->ns_so = NULL; 899 if (fp) 900 closef(fp, NULL); 901 kfree((caddr_t)slp, M_NFSSVC); 902 } else { 903 --slp->ns_sref; 904 } 905 } 906 907 void 908 nfsrv_slpref(struct nfssvc_sock *slp) 909 { 910 ASSERT_LWKT_TOKEN_HELD(&nfs_token); 911 ++slp->ns_sref; 912 } 913 914 /* 915 * Lock a socket against others. 916 * 917 * Returns 0 on failure, 1 on success. 918 */ 919 int 920 nfs_slplock(struct nfssvc_sock *slp, int wait) 921 { 922 mtx_t *mtx = &slp->ns_solock; 923 924 if (wait) { 925 mtx_lock_ex(mtx, 0, 0); 926 return(1); 927 } else if (mtx_lock_ex_try(mtx) == 0) { 928 return(1); 929 } else { 930 return(0); 931 } 932 } 933 934 /* 935 * Unlock the stream socket for others. 936 */ 937 void 938 nfs_slpunlock(struct nfssvc_sock *slp) 939 { 940 mtx_t *mtx = &slp->ns_solock; 941 942 mtx_unlock(mtx); 943 } 944 945 /* 946 * Initialize the data structures for the server. 947 * Handshake with any new nfsds starting up to avoid any chance of 948 * corruption. 949 */ 950 void 951 nfsrv_init(int terminating) 952 { 953 struct nfssvc_sock *slp, *nslp; 954 955 lwkt_gettoken(&nfs_token); 956 if (nfssvc_sockhead_flag & SLP_INIT) 957 panic("nfsd init"); 958 nfssvc_sockhead_flag |= SLP_INIT; 959 960 if (terminating) { 961 TAILQ_FOREACH_MUTABLE(slp, &nfssvc_sockhead, ns_chain, nslp) { 962 nfsrv_slpref(slp); 963 lwkt_gettoken(&slp->ns_token); 964 if (slp->ns_flag & SLP_VALID) 965 nfsrv_zapsock(slp); 966 lwkt_reltoken(&slp->ns_token); 967 nfsrv_slpderef(slp); 968 } 969 nfsrv_cleancache(); /* And clear out server cache */ 970 } else { 971 nfs_pub.np_valid = 0; 972 } 973 974 TAILQ_INIT(&nfssvc_sockhead); 975 nfssvc_sockhead_flag &= ~SLP_INIT; 976 if (nfssvc_sockhead_flag & SLP_WANTINIT) { 977 nfssvc_sockhead_flag &= ~SLP_WANTINIT; 978 wakeup((caddr_t)&nfssvc_sockhead); 979 } 980 981 TAILQ_INIT(&nfsd_head); 982 nfsd_head_flag &= ~NFSD_CHECKSLP; 983 984 lwkt_reltoken(&nfs_token); 985 986 #if 0 987 nfs_udpsock = (struct nfssvc_sock *) 988 kmalloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK | M_ZERO); 989 mtx_init(&nfs_udpsock->ns_solock); 990 STAILQ_INIT(&nfs_udpsock->ns_rec); 991 TAILQ_INIT(&nfs_udpsock->ns_uidlruhead); 992 TAILQ_INSERT_HEAD(&nfssvc_sockhead, nfs_udpsock, ns_chain); 993 994 nfs_cltpsock = (struct nfssvc_sock *) 995 kmalloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK | M_ZERO); 996 mtx_init(&nfs_cltpsock->ns_solock); 997 STAILQ_INIT(&nfs_cltpsock->ns_rec); 998 TAILQ_INIT(&nfs_cltpsock->ns_uidlruhead); 999 TAILQ_INSERT_TAIL(&nfssvc_sockhead, nfs_cltpsock, ns_chain); 1000 #endif 1001 } 1002 1003 /* 1004 * Add entries to the server monitor log. 1005 */ 1006 static void 1007 nfsd_rt(int sotype, struct nfsrv_descript *nd, int cacherep) 1008 { 1009 struct drt *rt; 1010 1011 rt = &nfsdrt.drt[nfsdrt.pos]; 1012 if (cacherep == RC_DOIT) 1013 rt->flag = 0; 1014 else if (cacherep == RC_REPLY) 1015 rt->flag = DRT_CACHEREPLY; 1016 else 1017 rt->flag = DRT_CACHEDROP; 1018 if (sotype == SOCK_STREAM) 1019 rt->flag |= DRT_TCP; 1020 if (nd->nd_flag & ND_NFSV3) 1021 rt->flag |= DRT_NFSV3; 1022 rt->proc = nd->nd_procnum; 1023 if (nd->nd_nam->sa_family == AF_INET) 1024 rt->ipadr = ((struct sockaddr_in *)nd->nd_nam)->sin_addr.s_addr; 1025 else 1026 rt->ipadr = INADDR_ANY; 1027 rt->resptime = nfs_curusec() - (nd->nd_starttime.tv_sec * 1000000 + nd->nd_starttime.tv_usec); 1028 getmicrotime(&rt->tstamp); 1029 nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ; 1030 } 1031 #endif /* NFS_NOSERVER */ 1032 1033 /* 1034 * Get an authorization string for the uid by having the mount_nfs sitting 1035 * on this mount point porpous out of the kernel and do it. 1036 */ 1037 int 1038 nfs_getauth(struct nfsmount *nmp, struct nfsreq *rep, 1039 struct ucred *cred, char **auth_str, int *auth_len, char *verf_str, 1040 int *verf_len, NFSKERBKEY_T key /* return session key */) 1041 { 1042 int error = 0; 1043 1044 while ((nmp->nm_state & NFSSTA_WAITAUTH) == 0) { 1045 nmp->nm_state |= NFSSTA_WANTAUTH; 1046 (void) tsleep((caddr_t)&nmp->nm_authtype, 0, 1047 "nfsauth1", 2 * hz); 1048 error = nfs_sigintr(nmp, rep, rep->r_td); 1049 if (error) { 1050 nmp->nm_state &= ~NFSSTA_WANTAUTH; 1051 return (error); 1052 } 1053 } 1054 nmp->nm_state &= ~(NFSSTA_WAITAUTH | NFSSTA_WANTAUTH); 1055 nmp->nm_authstr = *auth_str = (char *)kmalloc(RPCAUTH_MAXSIZ, M_TEMP, M_WAITOK); 1056 nmp->nm_authlen = RPCAUTH_MAXSIZ; 1057 nmp->nm_verfstr = verf_str; 1058 nmp->nm_verflen = *verf_len; 1059 nmp->nm_authuid = cred->cr_uid; 1060 wakeup((caddr_t)&nmp->nm_authstr); 1061 1062 /* 1063 * And wait for mount_nfs to do its stuff. 1064 */ 1065 while ((nmp->nm_state & NFSSTA_HASAUTH) == 0 && error == 0) { 1066 (void) tsleep((caddr_t)&nmp->nm_authlen, 0, 1067 "nfsauth2", 2 * hz); 1068 error = nfs_sigintr(nmp, rep, rep->r_td); 1069 } 1070 if (nmp->nm_state & NFSSTA_AUTHERR) { 1071 nmp->nm_state &= ~NFSSTA_AUTHERR; 1072 error = EAUTH; 1073 } 1074 if (error) 1075 kfree((caddr_t)*auth_str, M_TEMP); 1076 else { 1077 *auth_len = nmp->nm_authlen; 1078 *verf_len = nmp->nm_verflen; 1079 bcopy((caddr_t)nmp->nm_key, (caddr_t)key, sizeof (NFSKERBKEY_T)); 1080 } 1081 nmp->nm_state &= ~NFSSTA_HASAUTH; 1082 nmp->nm_state |= NFSSTA_WAITAUTH; 1083 if (nmp->nm_state & NFSSTA_WANTAUTH) { 1084 nmp->nm_state &= ~NFSSTA_WANTAUTH; 1085 wakeup((caddr_t)&nmp->nm_authtype); 1086 } 1087 return (error); 1088 } 1089 1090 /* 1091 * Get a nickname authenticator and verifier. 1092 */ 1093 int 1094 nfs_getnickauth(struct nfsmount *nmp, struct ucred *cred, char **auth_str, 1095 int *auth_len, char *verf_str, int verf_len) 1096 { 1097 struct nfsuid *nuidp; 1098 u_int32_t *nickp, *verfp; 1099 struct timeval ktvout; 1100 1101 #ifdef DIAGNOSTIC 1102 if (verf_len < (4 * NFSX_UNSIGNED)) 1103 panic("nfs_getnickauth verf too small"); 1104 #endif 1105 for (nuidp = NMUIDHASH(nmp, cred->cr_uid)->lh_first; 1106 nuidp != NULL; nuidp = nuidp->nu_hash.le_next) { 1107 if (nuidp->nu_cr.cr_uid == cred->cr_uid) 1108 break; 1109 } 1110 if (!nuidp || nuidp->nu_expire < time_uptime) 1111 return (EACCES); 1112 1113 /* 1114 * Move to the end of the lru list (end of lru == most recently used). 1115 */ 1116 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru); 1117 TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, nu_lru); 1118 1119 nickp = (u_int32_t *)kmalloc(2 * NFSX_UNSIGNED, M_TEMP, M_WAITOK); 1120 *nickp++ = txdr_unsigned(RPCAKN_NICKNAME); 1121 *nickp = txdr_unsigned(nuidp->nu_nickname); 1122 *auth_str = (char *)nickp; 1123 *auth_len = 2 * NFSX_UNSIGNED; 1124 1125 /* 1126 * Now we must encrypt the verifier and package it up. 1127 */ 1128 verfp = (u_int32_t *)verf_str; 1129 *verfp++ = txdr_unsigned(RPCAKN_NICKNAME); 1130 if (time_second != nuidp->nu_timestamp.tv_sec || 1131 (time_second == nuidp->nu_timestamp.tv_sec && 1132 time_second > nuidp->nu_timestamp.tv_usec)) /* XXX */ 1133 getmicrotime(&nuidp->nu_timestamp); 1134 else 1135 nuidp->nu_timestamp.tv_usec++; 1136 1137 /* 1138 * Now encrypt the timestamp verifier in ecb mode using the session 1139 * key. 1140 */ 1141 #ifdef NFSKERB 1142 XXX 1143 #else 1144 ktvout.tv_sec = 0; 1145 ktvout.tv_usec = 0; 1146 #endif 1147 1148 *verfp++ = ktvout.tv_sec; 1149 *verfp++ = ktvout.tv_usec; 1150 *verfp = 0; 1151 return (0); 1152 } 1153 1154 /* 1155 * Save the current nickname in a hash list entry on the mount point. 1156 */ 1157 int 1158 nfs_savenickauth(struct nfsmount *nmp, struct ucred *cred, int len, 1159 NFSKERBKEY_T key, struct mbuf **mdp, char **dposp, 1160 struct mbuf *mrep) 1161 { 1162 struct nfsuid *nuidp; 1163 u_int32_t *tl; 1164 struct timeval ktvin, ktvout; 1165 u_int32_t nick; 1166 int deltasec, error = 0; 1167 struct nfsm_info info; 1168 1169 info.md = *mdp; 1170 info.dpos = *dposp; 1171 info.mrep = mrep; 1172 1173 if (len == (3 * NFSX_UNSIGNED)) { 1174 NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED)); 1175 ktvin.tv_sec = *tl++; 1176 ktvin.tv_usec = *tl++; 1177 nick = fxdr_unsigned(u_int32_t, *tl); 1178 1179 /* 1180 * Decrypt the timestamp in ecb mode. 1181 */ 1182 #ifdef NFSKERB 1183 XXX 1184 #else 1185 ktvout.tv_sec = 0; 1186 ktvout.tv_usec = 0; 1187 #endif 1188 ktvout.tv_sec = fxdr_unsigned(long, ktvout.tv_sec); 1189 ktvout.tv_usec = fxdr_unsigned(long, ktvout.tv_usec); 1190 deltasec = time_second - ktvout.tv_sec; 1191 if (deltasec < 0) 1192 deltasec = -deltasec; 1193 /* 1194 * If ok, add it to the hash list for the mount point. 1195 */ 1196 if (deltasec <= NFS_KERBCLOCKSKEW) { 1197 if (nmp->nm_numuids < nuidhash_max) { 1198 nmp->nm_numuids++; 1199 nuidp = (struct nfsuid *) 1200 kmalloc(sizeof (struct nfsuid), M_NFSUID, 1201 M_WAITOK); 1202 } else { 1203 nuidp = TAILQ_FIRST(&nmp->nm_uidlruhead); 1204 LIST_REMOVE(nuidp, nu_hash); 1205 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, 1206 nu_lru); 1207 } 1208 nuidp->nu_flag = 0; 1209 nuidp->nu_cr.cr_uid = cred->cr_uid; 1210 nuidp->nu_expire = time_uptime + NFS_KERBTTL; 1211 nuidp->nu_timestamp = ktvout; 1212 nuidp->nu_nickname = nick; 1213 bcopy(key, nuidp->nu_key, sizeof (NFSKERBKEY_T)); 1214 TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, 1215 nu_lru); 1216 LIST_INSERT_HEAD(NMUIDHASH(nmp, cred->cr_uid), 1217 nuidp, nu_hash); 1218 } 1219 } else { 1220 ERROROUT(nfsm_adv(&info, nfsm_rndup(len))); 1221 } 1222 nfsmout: 1223 *mdp = info.md; 1224 *dposp = info.dpos; 1225 return (error); 1226 } 1227