nfs_nfsiod.c revision 75631
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. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)nfs_syscalls.c 8.5 (Berkeley) 3/30/95 37 * $FreeBSD: head/sys/nfsclient/nfs_nfsiod.c 75631 2001-04-17 20:45:23Z alfred $ 38 */ 39 40#include <sys/param.h> 41#include <sys/systm.h> 42#include <sys/sysproto.h> 43#include <sys/kernel.h> 44#include <sys/sysctl.h> 45#include <sys/file.h> 46#include <sys/filedesc.h> 47#include <sys/vnode.h> 48#include <sys/malloc.h> 49#include <sys/mount.h> 50#include <sys/proc.h> 51#include <sys/bio.h> 52#include <sys/buf.h> 53#include <sys/mbuf.h> 54#include <sys/socket.h> 55#include <sys/socketvar.h> 56#include <sys/domain.h> 57#include <sys/protosw.h> 58#include <sys/namei.h> 59#include <sys/fcntl.h> 60#include <sys/lockf.h> 61 62#include <netinet/in.h> 63#include <netinet/tcp.h> 64#include <nfs/xdr_subs.h> 65#include <nfs/rpcv2.h> 66#include <nfs/nfsproto.h> 67#include <nfs/nfs.h> 68#include <nfs/nfsm_subs.h> 69#include <nfs/nfsrvcache.h> 70#include <nfs/nfsmount.h> 71#include <nfs/nfsnode.h> 72#include <nfs/nqnfs.h> 73#include <nfs/nfsrtt.h> 74#include <nfs/nfs_lock.h> 75 76static MALLOC_DEFINE(M_NFSSVC, "NFS srvsock", "Nfs server structure"); 77 78/* Global defs. */ 79extern int32_t (*nfsrv3_procs[NFS_NPROCS]) __P((struct nfsrv_descript *nd, 80 struct nfssvc_sock *slp, 81 struct proc *procp, 82 struct mbuf **mreqp)); 83extern int nfs_numasync; 84extern time_t nqnfsstarttime; 85extern int nqsrv_writeslack; 86extern int nfsrtton; 87extern struct nfsstats nfsstats; 88extern int nfsrvw_procrastinate; 89extern int nfsrvw_procrastinate_v3; 90static int nuidhash_max = NFS_MAXUIDHASH; 91 92#ifndef NFS_NOSERVER 93static void nfsrv_zapsock __P((struct nfssvc_sock *slp)); 94#endif 95static int nfssvc_iod __P((struct proc *)); 96 97#define TRUE 1 98#define FALSE 0 99 100static int nfs_asyncdaemon[NFS_MAXASYNCDAEMON]; 101 102SYSCTL_DECL(_vfs_nfs); 103 104#ifndef NFS_NOSERVER 105int nfsd_waiting = 0; 106static struct nfsdrt nfsdrt; 107static int nfs_numnfsd = 0; 108static int notstarted = 1; 109static int modify_flag = 0; 110static void nfsd_rt __P((int sotype, struct nfsrv_descript *nd, 111 int cacherep)); 112static int nfssvc_addsock __P((struct file *, struct sockaddr *, 113 struct proc *)); 114static int nfssvc_nfsd __P((struct nfsd_srvargs *,caddr_t,struct proc *)); 115 116static int nfs_privport = 0; 117SYSCTL_INT(_vfs_nfs, NFS_NFSPRIVPORT, nfs_privport, CTLFLAG_RW, &nfs_privport, 0, ""); 118SYSCTL_INT(_vfs_nfs, OID_AUTO, gatherdelay, CTLFLAG_RW, &nfsrvw_procrastinate, 0, ""); 119SYSCTL_INT(_vfs_nfs, OID_AUTO, gatherdelay_v3, CTLFLAG_RW, &nfsrvw_procrastinate_v3, 0, ""); 120 121/* 122 * NFS server system calls 123 */ 124 125#endif /* NFS_NOSERVER */ 126/* 127 * Nfs server psuedo system call for the nfsd's 128 * Based on the flag value it either: 129 * - adds a socket to the selection list 130 * - remains in the kernel as an nfsd 131 * - remains in the kernel as an nfsiod 132 */ 133#ifndef _SYS_SYSPROTO_H_ 134struct nfssvc_args { 135 int flag; 136 caddr_t argp; 137}; 138#endif 139int 140nfssvc(p, uap) 141 struct proc *p; 142 register struct nfssvc_args *uap; 143{ 144#ifndef NFS_NOSERVER 145 struct nameidata nd; 146 struct file *fp; 147 struct sockaddr *nam; 148 struct nfsd_args nfsdarg; 149 struct nfsd_srvargs nfsd_srvargs, *nsd = &nfsd_srvargs; 150 struct nfsd_cargs ncd; 151 struct nfsd *nfsd; 152 struct nfssvc_sock *slp; 153 struct nfsuid *nuidp; 154 struct nfsmount *nmp; 155#endif /* NFS_NOSERVER */ 156 int error; 157 158 if ((uap->flag & NFSSVC_LOCKDANS) != 0) { 159 struct lockd_ans la; 160 161 error = copyin(uap->argp, &la, sizeof(la)); 162 return (error != 0 ? error : nfslockdans(p, &la)); 163 } 164 /* 165 * Must be super user 166 */ 167 error = suser(p); 168 if(error) 169 return (error); 170 while (nfssvc_sockhead_flag & SLP_INIT) { 171 nfssvc_sockhead_flag |= SLP_WANTINIT; 172 (void) tsleep((caddr_t)&nfssvc_sockhead, PSOCK, "nfsd init", 0); 173 } 174 if (uap->flag & NFSSVC_BIOD) 175 error = nfssvc_iod(p); 176#ifdef NFS_NOSERVER 177 else 178 error = ENXIO; 179#else /* !NFS_NOSERVER */ 180 else if (uap->flag & NFSSVC_MNTD) { 181 error = copyin(uap->argp, (caddr_t)&ncd, sizeof (ncd)); 182 if (error) 183 return (error); 184 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 185 ncd.ncd_dirp, p); 186 error = namei(&nd); 187 if (error) 188 return (error); 189 NDFREE(&nd, NDF_ONLY_PNBUF); 190 if ((nd.ni_vp->v_flag & VROOT) == 0) 191 error = EINVAL; 192 nmp = VFSTONFS(nd.ni_vp->v_mount); 193 vput(nd.ni_vp); 194 if (error) 195 return (error); 196 if ((nmp->nm_state & NFSSTA_MNTD) && 197 (uap->flag & NFSSVC_GOTAUTH) == 0) 198 return (0); 199 nmp->nm_state |= NFSSTA_MNTD; 200 error = nqnfs_clientd(nmp, p->p_ucred, &ncd, uap->flag, 201 uap->argp, p); 202 } else if (uap->flag & NFSSVC_ADDSOCK) { 203 error = copyin(uap->argp, (caddr_t)&nfsdarg, sizeof(nfsdarg)); 204 if (error) 205 return (error); 206 error = holdsock(p->p_fd, nfsdarg.sock, &fp); 207 if (error) 208 return (error); 209 /* 210 * Get the client address for connected sockets. 211 */ 212 if (nfsdarg.name == NULL || nfsdarg.namelen == 0) 213 nam = (struct sockaddr *)0; 214 else { 215 error = getsockaddr(&nam, nfsdarg.name, 216 nfsdarg.namelen); 217 if (error) { 218 fdrop(fp, p); 219 return (error); 220 } 221 } 222 error = nfssvc_addsock(fp, nam, p); 223 fdrop(fp, p); 224 } else { 225 error = copyin(uap->argp, (caddr_t)nsd, sizeof (*nsd)); 226 if (error) 227 return (error); 228 if ((uap->flag & NFSSVC_AUTHIN) && 229 ((nfsd = nsd->nsd_nfsd)) != NULL && 230 (nfsd->nfsd_slp->ns_flag & SLP_VALID)) { 231 slp = nfsd->nfsd_slp; 232 233 /* 234 * First check to see if another nfsd has already 235 * added this credential. 236 */ 237 for (nuidp = NUIDHASH(slp,nsd->nsd_cr.cr_uid)->lh_first; 238 nuidp != 0; nuidp = nuidp->nu_hash.le_next) { 239 if (nuidp->nu_cr.cr_uid == nsd->nsd_cr.cr_uid && 240 (!nfsd->nfsd_nd->nd_nam2 || 241 netaddr_match(NU_NETFAM(nuidp), 242 &nuidp->nu_haddr, nfsd->nfsd_nd->nd_nam2))) 243 break; 244 } 245 if (nuidp) { 246 nfsrv_setcred(&nuidp->nu_cr,&nfsd->nfsd_nd->nd_cr); 247 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL; 248 } else { 249 /* 250 * Nope, so we will. 251 */ 252 if (slp->ns_numuids < nuidhash_max) { 253 slp->ns_numuids++; 254 nuidp = (struct nfsuid *) 255 malloc(sizeof (struct nfsuid), M_NFSUID, 256 M_WAITOK); 257 } else 258 nuidp = (struct nfsuid *)0; 259 if ((slp->ns_flag & SLP_VALID) == 0) { 260 if (nuidp) 261 free((caddr_t)nuidp, M_NFSUID); 262 } else { 263 if (nuidp == (struct nfsuid *)0) { 264 nuidp = slp->ns_uidlruhead.tqh_first; 265 LIST_REMOVE(nuidp, nu_hash); 266 TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, 267 nu_lru); 268 if (nuidp->nu_flag & NU_NAM) 269 FREE(nuidp->nu_nam, M_SONAME); 270 } 271 nuidp->nu_flag = 0; 272 bzero(&nuidp->nu_cr, sizeof(nuidp->nu_cr)); 273 nuidp->nu_cr.cr_uid = nsd->nsd_cr.cr_uid; 274 nuidp->nu_cr.cr_ngroups = 275 nsd->nsd_cr.cr_ngroups; 276 bcopy(nsd->nsd_cr.cr_groups, 277 nuidp->nu_cr.cr_groups, 278 sizeof(nuidp->nu_cr.cr_groups)); 279 if (nuidp->nu_cr.cr_ngroups > NGROUPS) 280 nuidp->nu_cr.cr_ngroups = NGROUPS; 281 nuidp->nu_cr.cr_ref = 1; 282 nuidp->nu_timestamp = nsd->nsd_timestamp; 283 nuidp->nu_expire = time_second + nsd->nsd_ttl; 284 /* 285 * and save the session key in nu_key. 286 */ 287 bcopy(nsd->nsd_key, nuidp->nu_key, 288 sizeof (nsd->nsd_key)); 289 if (nfsd->nfsd_nd->nd_nam2) { 290 struct sockaddr_in *saddr; 291 292 saddr = (struct sockaddr_in *) 293 nfsd->nfsd_nd->nd_nam2; 294 switch (saddr->sin_family) { 295 case AF_INET: 296 nuidp->nu_flag |= NU_INETADDR; 297 nuidp->nu_inetaddr = 298 saddr->sin_addr.s_addr; 299 break; 300 case AF_ISO: 301 default: 302 nuidp->nu_flag |= NU_NAM; 303 nuidp->nu_nam = 304 dup_sockaddr(nfsd->nfsd_nd-> 305 nd_nam2, 1); 306 break; 307 }; 308 } 309 TAILQ_INSERT_TAIL(&slp->ns_uidlruhead, nuidp, 310 nu_lru); 311 LIST_INSERT_HEAD(NUIDHASH(slp, nsd->nsd_uid), 312 nuidp, nu_hash); 313 nfsrv_setcred(&nuidp->nu_cr, 314 &nfsd->nfsd_nd->nd_cr); 315 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL; 316 } 317 } 318 } 319 if ((uap->flag & NFSSVC_AUTHINFAIL) && (nfsd = nsd->nsd_nfsd)) 320 nfsd->nfsd_flag |= NFSD_AUTHFAIL; 321 error = nfssvc_nfsd(nsd, uap->argp, p); 322 } 323#endif /* NFS_NOSERVER */ 324 if (error == EINTR || error == ERESTART) 325 error = 0; 326 return (error); 327} 328 329#ifndef NFS_NOSERVER 330/* 331 * Adds a socket to the list for servicing by nfsds. 332 */ 333static int 334nfssvc_addsock(fp, mynam, p) 335 struct file *fp; 336 struct sockaddr *mynam; 337 struct proc *p; 338{ 339 register int siz; 340 register struct nfssvc_sock *slp; 341 register struct socket *so; 342 int error, s; 343 344 so = (struct socket *)fp->f_data; 345#if 0 346 tslp = (struct nfssvc_sock *)0; 347 /* 348 * Add it to the list, as required. 349 */ 350 if (so->so_proto->pr_protocol == IPPROTO_UDP) { 351 tslp = nfs_udpsock; 352 if (tslp->ns_flag & SLP_VALID) { 353 if (mynam != NULL) 354 FREE(mynam, M_SONAME); 355 return (EPERM); 356 } 357 } 358#endif 359 if (so->so_type == SOCK_STREAM) 360 siz = NFS_MAXPACKET + sizeof (u_long); 361 else 362 siz = NFS_MAXPACKET; 363 error = soreserve(so, siz, siz); 364 if (error) { 365 if (mynam != NULL) 366 FREE(mynam, M_SONAME); 367 return (error); 368 } 369 370 /* 371 * Set protocol specific options { for now TCP only } and 372 * reserve some space. For datagram sockets, this can get called 373 * repeatedly for the same socket, but that isn't harmful. 374 */ 375 if (so->so_type == SOCK_STREAM) { 376 struct sockopt sopt; 377 int val; 378 379 bzero(&sopt, sizeof sopt); 380 sopt.sopt_level = SOL_SOCKET; 381 sopt.sopt_name = SO_KEEPALIVE; 382 sopt.sopt_val = &val; 383 sopt.sopt_valsize = sizeof val; 384 val = 1; 385 sosetopt(so, &sopt); 386 } 387 if (so->so_proto->pr_domain->dom_family == AF_INET && 388 so->so_proto->pr_protocol == IPPROTO_TCP) { 389 struct sockopt sopt; 390 int val; 391 392 bzero(&sopt, sizeof sopt); 393 sopt.sopt_level = IPPROTO_TCP; 394 sopt.sopt_name = TCP_NODELAY; 395 sopt.sopt_val = &val; 396 sopt.sopt_valsize = sizeof val; 397 val = 1; 398 sosetopt(so, &sopt); 399 } 400 so->so_rcv.sb_flags &= ~SB_NOINTR; 401 so->so_rcv.sb_timeo = 0; 402 so->so_snd.sb_flags &= ~SB_NOINTR; 403 so->so_snd.sb_timeo = 0; 404 405 slp = (struct nfssvc_sock *) 406 malloc(sizeof (struct nfssvc_sock), M_NFSSVC, 407 M_WAITOK | M_ZERO); 408 STAILQ_INIT(&slp->ns_rec); 409 TAILQ_INIT(&slp->ns_uidlruhead); 410 TAILQ_INSERT_TAIL(&nfssvc_sockhead, slp, ns_chain); 411 412 slp->ns_so = so; 413 slp->ns_nam = mynam; 414 fp->f_count++; 415 slp->ns_fp = fp; 416 s = splnet(); 417 so->so_upcallarg = (caddr_t)slp; 418 so->so_upcall = nfsrv_rcv; 419 so->so_rcv.sb_flags |= SB_UPCALL; 420 slp->ns_flag = (SLP_VALID | SLP_NEEDQ); 421 nfsrv_wakenfsd(slp); 422 splx(s); 423 return (0); 424} 425 426/* 427 * Called by nfssvc() for nfsds. Just loops around servicing rpc requests 428 * until it is killed by a signal. 429 */ 430static int 431nfssvc_nfsd(nsd, argp, p) 432 struct nfsd_srvargs *nsd; 433 caddr_t argp; 434 struct proc *p; 435{ 436 register int siz; 437 register struct nfssvc_sock *slp; 438 struct nfsd *nfsd = nsd->nsd_nfsd; 439 struct nfsrv_descript *nd = NULL; 440 struct mbuf *m, *mreq; 441 int error = 0, cacherep, s, sotype, writes_todo; 442 int procrastinate; 443 u_quad_t cur_usec; 444 445#ifndef nolint 446 cacherep = RC_DOIT; 447 writes_todo = 0; 448#endif 449 if (nfsd == (struct nfsd *)0) { 450 nsd->nsd_nfsd = nfsd = (struct nfsd *) 451 malloc(sizeof (struct nfsd), M_NFSD, M_WAITOK | M_ZERO); 452 s = splnet(); 453 nfsd->nfsd_procp = p; 454 TAILQ_INSERT_TAIL(&nfsd_head, nfsd, nfsd_chain); 455 nfs_numnfsd++; 456 } else 457 s = splnet(); 458 459 /* 460 * Loop getting rpc requests until SIGKILL. 461 */ 462 for (;;) { 463 if ((nfsd->nfsd_flag & NFSD_REQINPROG) == 0) { 464 while (nfsd->nfsd_slp == (struct nfssvc_sock *)0 && 465 (nfsd_head_flag & NFSD_CHECKSLP) == 0) { 466 nfsd->nfsd_flag |= NFSD_WAITING; 467 nfsd_waiting++; 468 error = tsleep((caddr_t)nfsd, PSOCK | PCATCH, 469 "nfsd", 0); 470 nfsd_waiting--; 471 if (error) 472 goto done; 473 } 474 if (nfsd->nfsd_slp == (struct nfssvc_sock *)0 && 475 (nfsd_head_flag & NFSD_CHECKSLP) != 0) { 476 for (slp = nfssvc_sockhead.tqh_first; slp != 0; 477 slp = slp->ns_chain.tqe_next) { 478 if ((slp->ns_flag & (SLP_VALID | SLP_DOREC)) 479 == (SLP_VALID | SLP_DOREC)) { 480 slp->ns_flag &= ~SLP_DOREC; 481 slp->ns_sref++; 482 nfsd->nfsd_slp = slp; 483 break; 484 } 485 } 486 if (slp == 0) 487 nfsd_head_flag &= ~NFSD_CHECKSLP; 488 } 489 if ((slp = nfsd->nfsd_slp) == (struct nfssvc_sock *)0) 490 continue; 491 if (slp->ns_flag & SLP_VALID) { 492 if (slp->ns_flag & SLP_DISCONN) 493 nfsrv_zapsock(slp); 494 else if (slp->ns_flag & SLP_NEEDQ) { 495 slp->ns_flag &= ~SLP_NEEDQ; 496 (void) nfs_slplock(slp, 1); 497 nfsrv_rcv(slp->ns_so, (caddr_t)slp, 498 M_TRYWAIT); 499 nfs_slpunlock(slp); 500 } 501 error = nfsrv_dorec(slp, nfsd, &nd); 502 cur_usec = nfs_curusec(); 503 if (error && slp->ns_tq.lh_first && 504 slp->ns_tq.lh_first->nd_time <= cur_usec) { 505 error = 0; 506 cacherep = RC_DOIT; 507 writes_todo = 1; 508 } else 509 writes_todo = 0; 510 nfsd->nfsd_flag |= NFSD_REQINPROG; 511 } 512 } else { 513 error = 0; 514 slp = nfsd->nfsd_slp; 515 } 516 if (error || (slp->ns_flag & SLP_VALID) == 0) { 517 if (nd) { 518 free((caddr_t)nd, M_NFSRVDESC); 519 nd = NULL; 520 } 521 nfsd->nfsd_slp = (struct nfssvc_sock *)0; 522 nfsd->nfsd_flag &= ~NFSD_REQINPROG; 523 nfsrv_slpderef(slp); 524 continue; 525 } 526 splx(s); 527 sotype = slp->ns_so->so_type; 528 if (nd) { 529 getmicrotime(&nd->nd_starttime); 530 if (nd->nd_nam2) 531 nd->nd_nam = nd->nd_nam2; 532 else 533 nd->nd_nam = slp->ns_nam; 534 535 /* 536 * Check to see if authorization is needed. 537 */ 538 if (nfsd->nfsd_flag & NFSD_NEEDAUTH) { 539 nfsd->nfsd_flag &= ~NFSD_NEEDAUTH; 540 nsd->nsd_haddr = 541 ((struct sockaddr_in *) 542 nd->nd_nam)->sin_addr.s_addr; 543 nsd->nsd_authlen = nfsd->nfsd_authlen; 544 nsd->nsd_verflen = nfsd->nfsd_verflen; 545 if (!copyout(nfsd->nfsd_authstr,nsd->nsd_authstr, 546 nfsd->nfsd_authlen) && 547 !copyout(nfsd->nfsd_verfstr, nsd->nsd_verfstr, 548 nfsd->nfsd_verflen) && 549 !copyout((caddr_t)nsd, argp, sizeof (*nsd))) 550 return (ENEEDAUTH); 551 cacherep = RC_DROPIT; 552 } else 553 cacherep = nfsrv_getcache(nd, slp, &mreq); 554 555 /* 556 * Check for just starting up for NQNFS and send 557 * fake "try again later" replies to the NQNFS clients. 558 */ 559 if (notstarted && nqnfsstarttime <= time_second) { 560 if (modify_flag) { 561 nqnfsstarttime = time_second + nqsrv_writeslack; 562 modify_flag = 0; 563 } else 564 notstarted = 0; 565 } 566 if (notstarted) { 567 if ((nd->nd_flag & ND_NQNFS) == 0) 568 cacherep = RC_DROPIT; 569 else if (nd->nd_procnum != NFSPROC_WRITE) { 570 nd->nd_procnum = NFSPROC_NOOP; 571 nd->nd_repstat = NQNFS_TRYLATER; 572 cacherep = RC_DOIT; 573 } else 574 modify_flag = 1; 575 } else if (nfsd->nfsd_flag & NFSD_AUTHFAIL) { 576 nfsd->nfsd_flag &= ~NFSD_AUTHFAIL; 577 nd->nd_procnum = NFSPROC_NOOP; 578 nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK); 579 cacherep = RC_DOIT; 580 } else if (nfs_privport) { 581 /* Check if source port is privileged */ 582 u_short port; 583 struct sockaddr *nam = nd->nd_nam; 584 struct sockaddr_in *sin; 585 586 sin = (struct sockaddr_in *)nam; 587 port = ntohs(sin->sin_port); 588 if (port >= IPPORT_RESERVED && 589 nd->nd_procnum != NFSPROC_NULL) { 590 nd->nd_procnum = NFSPROC_NOOP; 591 nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK); 592 cacherep = RC_DOIT; 593 printf("NFS request from unprivileged port (%s:%d)\n", 594 inet_ntoa(sin->sin_addr), port); 595 } 596 } 597 598 } 599 600 /* 601 * Loop to get all the write rpc relies that have been 602 * gathered together. 603 */ 604 do { 605 switch (cacherep) { 606 case RC_DOIT: 607 if (nd && (nd->nd_flag & ND_NFSV3)) 608 procrastinate = nfsrvw_procrastinate_v3; 609 else 610 procrastinate = nfsrvw_procrastinate; 611 if (writes_todo || (nd->nd_procnum == NFSPROC_WRITE && 612 procrastinate > 0 && !notstarted)) 613 error = nfsrv_writegather(&nd, slp, 614 nfsd->nfsd_procp, &mreq); 615 else 616 error = (*(nfsrv3_procs[nd->nd_procnum]))(nd, 617 slp, nfsd->nfsd_procp, &mreq); 618 if (mreq == NULL) 619 break; 620 if (error != 0 && error != NFSERR_RETVOID) { 621 if (nd->nd_procnum != NQNFSPROC_VACATED) 622 nfsstats.srv_errs++; 623 nfsrv_updatecache(nd, FALSE, mreq); 624 if (nd->nd_nam2) 625 FREE(nd->nd_nam2, M_SONAME); 626 break; 627 } 628 nfsstats.srvrpccnt[nd->nd_procnum]++; 629 nfsrv_updatecache(nd, TRUE, mreq); 630 nd->nd_mrep = (struct mbuf *)0; 631 case RC_REPLY: 632 m = mreq; 633 siz = 0; 634 while (m) { 635 siz += m->m_len; 636 m = m->m_next; 637 } 638 if (siz <= 0 || siz > NFS_MAXPACKET) { 639 printf("mbuf siz=%d\n",siz); 640 panic("Bad nfs svc reply"); 641 } 642 m = mreq; 643 m->m_pkthdr.len = siz; 644 m->m_pkthdr.rcvif = (struct ifnet *)0; 645 /* 646 * For stream protocols, prepend a Sun RPC 647 * Record Mark. 648 */ 649 if (sotype == SOCK_STREAM) { 650 M_PREPEND(m, NFSX_UNSIGNED, M_TRYWAIT); 651 *mtod(m, u_int32_t *) = htonl(0x80000000 | siz); 652 } 653 if (slp->ns_so->so_proto->pr_flags & PR_CONNREQUIRED) 654 (void) nfs_slplock(slp, 1); 655 if (slp->ns_flag & SLP_VALID) 656 error = nfs_send(slp->ns_so, nd->nd_nam2, m, NULL); 657 else { 658 error = EPIPE; 659 m_freem(m); 660 } 661 if (nfsrtton) 662 nfsd_rt(sotype, nd, cacherep); 663 if (nd->nd_nam2) 664 FREE(nd->nd_nam2, M_SONAME); 665 if (nd->nd_mrep) 666 m_freem(nd->nd_mrep); 667 if (error == EPIPE) 668 nfsrv_zapsock(slp); 669 if (slp->ns_so->so_proto->pr_flags & PR_CONNREQUIRED) 670 nfs_slpunlock(slp); 671 if (error == EINTR || error == ERESTART) { 672 free((caddr_t)nd, M_NFSRVDESC); 673 nfsrv_slpderef(slp); 674 s = splnet(); 675 goto done; 676 } 677 break; 678 case RC_DROPIT: 679 if (nfsrtton) 680 nfsd_rt(sotype, nd, cacherep); 681 m_freem(nd->nd_mrep); 682 if (nd->nd_nam2) 683 FREE(nd->nd_nam2, M_SONAME); 684 break; 685 }; 686 if (nd) { 687 FREE((caddr_t)nd, M_NFSRVDESC); 688 nd = NULL; 689 } 690 691 /* 692 * Check to see if there are outstanding writes that 693 * need to be serviced. 694 */ 695 cur_usec = nfs_curusec(); 696 s = splsoftclock(); 697 if (slp->ns_tq.lh_first && 698 slp->ns_tq.lh_first->nd_time <= cur_usec) { 699 cacherep = RC_DOIT; 700 writes_todo = 1; 701 } else 702 writes_todo = 0; 703 splx(s); 704 } while (writes_todo); 705 s = splnet(); 706 if (nfsrv_dorec(slp, nfsd, &nd)) { 707 nfsd->nfsd_flag &= ~NFSD_REQINPROG; 708 nfsd->nfsd_slp = NULL; 709 nfsrv_slpderef(slp); 710 } 711 } 712done: 713 TAILQ_REMOVE(&nfsd_head, nfsd, nfsd_chain); 714 splx(s); 715 free((caddr_t)nfsd, M_NFSD); 716 nsd->nsd_nfsd = (struct nfsd *)0; 717 if (--nfs_numnfsd == 0) 718 nfsrv_init(TRUE); /* Reinitialize everything */ 719 return (error); 720} 721 722/* 723 * Shut down a socket associated with an nfssvc_sock structure. 724 * Should be called with the send lock set, if required. 725 * The trick here is to increment the sref at the start, so that the nfsds 726 * will stop using it and clear ns_flag at the end so that it will not be 727 * reassigned during cleanup. 728 */ 729static void 730nfsrv_zapsock(slp) 731 register struct nfssvc_sock *slp; 732{ 733 register struct nfsuid *nuidp, *nnuidp; 734 register struct nfsrv_descript *nwp, *nnwp; 735 struct socket *so; 736 struct file *fp; 737 struct nfsrv_rec *rec; 738 int s; 739 740 slp->ns_flag &= ~SLP_ALLFLAGS; 741 fp = slp->ns_fp; 742 if (fp) { 743 slp->ns_fp = (struct file *)0; 744 so = slp->ns_so; 745 so->so_rcv.sb_flags &= ~SB_UPCALL; 746 so->so_upcall = NULL; 747 so->so_upcallarg = NULL; 748 soshutdown(so, 2); 749 closef(fp, (struct proc *)0); 750 if (slp->ns_nam) 751 FREE(slp->ns_nam, M_SONAME); 752 m_freem(slp->ns_raw); 753 while ((rec = STAILQ_FIRST(&slp->ns_rec)) != NULL) { 754 STAILQ_REMOVE_HEAD(&slp->ns_rec, nr_link); 755 if (rec->nr_address) 756 FREE(rec->nr_address, M_SONAME); 757 m_freem(rec->nr_packet); 758 free(rec, M_NFSRVDESC); 759 } 760 for (nuidp = slp->ns_uidlruhead.tqh_first; nuidp != 0; 761 nuidp = nnuidp) { 762 nnuidp = nuidp->nu_lru.tqe_next; 763 LIST_REMOVE(nuidp, nu_hash); 764 TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, nu_lru); 765 if (nuidp->nu_flag & NU_NAM) 766 FREE(nuidp->nu_nam, M_SONAME); 767 free((caddr_t)nuidp, M_NFSUID); 768 } 769 s = splsoftclock(); 770 for (nwp = slp->ns_tq.lh_first; nwp; nwp = nnwp) { 771 nnwp = nwp->nd_tq.le_next; 772 LIST_REMOVE(nwp, nd_tq); 773 free((caddr_t)nwp, M_NFSRVDESC); 774 } 775 LIST_INIT(&slp->ns_tq); 776 splx(s); 777 } 778} 779 780/* 781 * Derefence a server socket structure. If it has no more references and 782 * is no longer valid, you can throw it away. 783 */ 784void 785nfsrv_slpderef(slp) 786 register struct nfssvc_sock *slp; 787{ 788 if (--(slp->ns_sref) == 0 && (slp->ns_flag & SLP_VALID) == 0) { 789 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain); 790 free((caddr_t)slp, M_NFSSVC); 791 } 792} 793 794/* 795 * Lock a socket against others. 796 */ 797int 798nfs_slplock(slp, wait) 799 register struct nfssvc_sock *slp; 800 int wait; 801{ 802 int *statep = &slp->ns_solock; 803 804 if (!wait && (*statep & NFSSTA_SNDLOCK)) 805 return(0); /* already locked, fail */ 806 while (*statep & NFSSTA_SNDLOCK) { 807 *statep |= NFSSTA_WANTSND; 808 (void) tsleep((caddr_t)statep, PZERO - 1, "nfsslplck", 0); 809 } 810 *statep |= NFSSTA_SNDLOCK; 811 return (1); 812} 813 814/* 815 * Unlock the stream socket for others. 816 */ 817void 818nfs_slpunlock(slp) 819 register struct nfssvc_sock *slp; 820{ 821 int *statep = &slp->ns_solock; 822 823 if ((*statep & NFSSTA_SNDLOCK) == 0) 824 panic("nfs slpunlock"); 825 *statep &= ~NFSSTA_SNDLOCK; 826 if (*statep & NFSSTA_WANTSND) { 827 *statep &= ~NFSSTA_WANTSND; 828 wakeup((caddr_t)statep); 829 } 830} 831 832/* 833 * Initialize the data structures for the server. 834 * Handshake with any new nfsds starting up to avoid any chance of 835 * corruption. 836 */ 837void 838nfsrv_init(terminating) 839 int terminating; 840{ 841 register struct nfssvc_sock *slp, *nslp; 842 843 if (nfssvc_sockhead_flag & SLP_INIT) 844 panic("nfsd init"); 845 nfssvc_sockhead_flag |= SLP_INIT; 846 if (terminating) { 847 for (slp = nfssvc_sockhead.tqh_first; slp != 0; slp = nslp) { 848 nslp = slp->ns_chain.tqe_next; 849 if (slp->ns_flag & SLP_VALID) 850 nfsrv_zapsock(slp); 851 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain); 852 free((caddr_t)slp, M_NFSSVC); 853 } 854 nfsrv_cleancache(); /* And clear out server cache */ 855 } else 856 nfs_pub.np_valid = 0; 857 858 TAILQ_INIT(&nfssvc_sockhead); 859 nfssvc_sockhead_flag &= ~SLP_INIT; 860 if (nfssvc_sockhead_flag & SLP_WANTINIT) { 861 nfssvc_sockhead_flag &= ~SLP_WANTINIT; 862 wakeup((caddr_t)&nfssvc_sockhead); 863 } 864 865 TAILQ_INIT(&nfsd_head); 866 nfsd_head_flag &= ~NFSD_CHECKSLP; 867 868#if 0 869 nfs_udpsock = (struct nfssvc_sock *) 870 malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK | M_ZERO); 871 STAILQ_INIT(&nfs_udpsock->ns_rec); 872 TAILQ_INIT(&nfs_udpsock->ns_uidlruhead); 873 TAILQ_INSERT_HEAD(&nfssvc_sockhead, nfs_udpsock, ns_chain); 874 875 nfs_cltpsock = (struct nfssvc_sock *) 876 malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK | M_ZERO); 877 STAILQ_INIT(&nfs_cltpsock->ns_rec); 878 TAILQ_INIT(&nfs_cltpsock->ns_uidlruhead); 879 TAILQ_INSERT_TAIL(&nfssvc_sockhead, nfs_cltpsock, ns_chain); 880#endif 881} 882 883/* 884 * Add entries to the server monitor log. 885 */ 886static void 887nfsd_rt(sotype, nd, cacherep) 888 int sotype; 889 register struct nfsrv_descript *nd; 890 int cacherep; 891{ 892 register struct drt *rt; 893 894 rt = &nfsdrt.drt[nfsdrt.pos]; 895 if (cacherep == RC_DOIT) 896 rt->flag = 0; 897 else if (cacherep == RC_REPLY) 898 rt->flag = DRT_CACHEREPLY; 899 else 900 rt->flag = DRT_CACHEDROP; 901 if (sotype == SOCK_STREAM) 902 rt->flag |= DRT_TCP; 903 if (nd->nd_flag & ND_NQNFS) 904 rt->flag |= DRT_NQNFS; 905 else if (nd->nd_flag & ND_NFSV3) 906 rt->flag |= DRT_NFSV3; 907 rt->proc = nd->nd_procnum; 908 if (nd->nd_nam->sa_family == AF_INET) 909 rt->ipadr = ((struct sockaddr_in *)nd->nd_nam)->sin_addr.s_addr; 910 else 911 rt->ipadr = INADDR_ANY; 912 rt->resptime = nfs_curusec() - (nd->nd_starttime.tv_sec * 1000000 + nd->nd_starttime.tv_usec); 913 getmicrotime(&rt->tstamp); 914 nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ; 915} 916#endif /* NFS_NOSERVER */ 917 918static int nfs_defect = 0; 919SYSCTL_INT(_vfs_nfs, OID_AUTO, defect, CTLFLAG_RW, &nfs_defect, 0, ""); 920 921/* 922 * Asynchronous I/O daemons for client nfs. 923 * They do read-ahead and write-behind operations on the block I/O cache. 924 * Never returns unless it fails or gets killed. 925 */ 926static int 927nfssvc_iod(p) 928 struct proc *p; 929{ 930 register struct buf *bp; 931 register int i, myiod; 932 struct nfsmount *nmp; 933 int error = 0; 934 935 /* 936 * Assign my position or return error if too many already running 937 */ 938 myiod = -1; 939 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) 940 if (nfs_asyncdaemon[i] == 0) { 941 nfs_asyncdaemon[i]++; 942 myiod = i; 943 break; 944 } 945 if (myiod == -1) 946 return (EBUSY); 947 nfs_numasync++; 948 /* 949 * Just loop around doin our stuff until SIGKILL 950 */ 951 for (;;) { 952 while (((nmp = nfs_iodmount[myiod]) == NULL 953 || nmp->nm_bufq.tqh_first == NULL) 954 && error == 0) { 955 if (nmp) 956 nmp->nm_bufqiods--; 957 nfs_iodwant[myiod] = p; 958 nfs_iodmount[myiod] = NULL; 959 error = tsleep((caddr_t)&nfs_iodwant[myiod], 960 PWAIT | PCATCH, "nfsidl", 0); 961 } 962 if (error) { 963 nfs_asyncdaemon[myiod] = 0; 964 if (nmp) 965 nmp->nm_bufqiods--; 966 nfs_iodwant[myiod] = NULL; 967 nfs_iodmount[myiod] = NULL; 968 nfs_numasync--; 969 return (error); 970 } 971 while ((bp = nmp->nm_bufq.tqh_first) != NULL) { 972 /* Take one off the front of the list */ 973 TAILQ_REMOVE(&nmp->nm_bufq, bp, b_freelist); 974 nmp->nm_bufqlen--; 975 if (nmp->nm_bufqwant && nmp->nm_bufqlen <= nfs_numasync) { 976 nmp->nm_bufqwant = FALSE; 977 wakeup(&nmp->nm_bufq); 978 } 979 if (bp->b_iocmd == BIO_READ) 980 (void) nfs_doio(bp, bp->b_rcred, (struct proc *)0); 981 else 982 (void) nfs_doio(bp, bp->b_wcred, (struct proc *)0); 983 /* 984 * If there are more than one iod on this mount, then defect 985 * so that the iods can be shared out fairly between the mounts 986 */ 987 if (nfs_defect && nmp->nm_bufqiods > 1) { 988 NFS_DPF(ASYNCIO, 989 ("nfssvc_iod: iod %d defecting from mount %p\n", 990 myiod, nmp)); 991 nfs_iodmount[myiod] = NULL; 992 nmp->nm_bufqiods--; 993 break; 994 } 995 } 996 } 997} 998 999 1000/* 1001 * Get an authorization string for the uid by having the mount_nfs sitting 1002 * on this mount point porpous out of the kernel and do it. 1003 */ 1004int 1005nfs_getauth(nmp, rep, cred, auth_str, auth_len, verf_str, verf_len, key) 1006 register struct nfsmount *nmp; 1007 struct nfsreq *rep; 1008 struct ucred *cred; 1009 char **auth_str; 1010 int *auth_len; 1011 char *verf_str; 1012 int *verf_len; 1013 NFSKERBKEY_T key; /* return session key */ 1014{ 1015 int error = 0; 1016 1017 while ((nmp->nm_state & NFSSTA_WAITAUTH) == 0) { 1018 nmp->nm_state |= NFSSTA_WANTAUTH; 1019 (void) tsleep((caddr_t)&nmp->nm_authtype, PSOCK, 1020 "nfsauth1", 2 * hz); 1021 error = nfs_sigintr(nmp, rep, rep->r_procp); 1022 if (error) { 1023 nmp->nm_state &= ~NFSSTA_WANTAUTH; 1024 return (error); 1025 } 1026 } 1027 nmp->nm_state &= ~(NFSSTA_WAITAUTH | NFSSTA_WANTAUTH); 1028 nmp->nm_authstr = *auth_str = (char *)malloc(RPCAUTH_MAXSIZ, M_TEMP, M_WAITOK); 1029 nmp->nm_authlen = RPCAUTH_MAXSIZ; 1030 nmp->nm_verfstr = verf_str; 1031 nmp->nm_verflen = *verf_len; 1032 nmp->nm_authuid = cred->cr_uid; 1033 wakeup((caddr_t)&nmp->nm_authstr); 1034 1035 /* 1036 * And wait for mount_nfs to do its stuff. 1037 */ 1038 while ((nmp->nm_state & NFSSTA_HASAUTH) == 0 && error == 0) { 1039 (void) tsleep((caddr_t)&nmp->nm_authlen, PSOCK, 1040 "nfsauth2", 2 * hz); 1041 error = nfs_sigintr(nmp, rep, rep->r_procp); 1042 } 1043 if (nmp->nm_state & NFSSTA_AUTHERR) { 1044 nmp->nm_state &= ~NFSSTA_AUTHERR; 1045 error = EAUTH; 1046 } 1047 if (error) 1048 free((caddr_t)*auth_str, M_TEMP); 1049 else { 1050 *auth_len = nmp->nm_authlen; 1051 *verf_len = nmp->nm_verflen; 1052 bcopy((caddr_t)nmp->nm_key, (caddr_t)key, sizeof (key)); 1053 } 1054 nmp->nm_state &= ~NFSSTA_HASAUTH; 1055 nmp->nm_state |= NFSSTA_WAITAUTH; 1056 if (nmp->nm_state & NFSSTA_WANTAUTH) { 1057 nmp->nm_state &= ~NFSSTA_WANTAUTH; 1058 wakeup((caddr_t)&nmp->nm_authtype); 1059 } 1060 return (error); 1061} 1062 1063/* 1064 * Get a nickname authenticator and verifier. 1065 */ 1066int 1067nfs_getnickauth(nmp, cred, auth_str, auth_len, verf_str, verf_len) 1068 struct nfsmount *nmp; 1069 struct ucred *cred; 1070 char **auth_str; 1071 int *auth_len; 1072 char *verf_str; 1073 int verf_len; 1074{ 1075 register struct nfsuid *nuidp; 1076 register u_int32_t *nickp, *verfp; 1077 struct timeval ktvin, ktvout; 1078 1079#ifdef DIAGNOSTIC 1080 if (verf_len < (4 * NFSX_UNSIGNED)) 1081 panic("nfs_getnickauth verf too small"); 1082#endif 1083 for (nuidp = NMUIDHASH(nmp, cred->cr_uid)->lh_first; 1084 nuidp != 0; nuidp = nuidp->nu_hash.le_next) { 1085 if (nuidp->nu_cr.cr_uid == cred->cr_uid) 1086 break; 1087 } 1088 if (!nuidp || nuidp->nu_expire < time_second) 1089 return (EACCES); 1090 1091 /* 1092 * Move to the end of the lru list (end of lru == most recently used). 1093 */ 1094 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru); 1095 TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, nu_lru); 1096 1097 nickp = (u_int32_t *)malloc(2 * NFSX_UNSIGNED, M_TEMP, M_WAITOK); 1098 *nickp++ = txdr_unsigned(RPCAKN_NICKNAME); 1099 *nickp = txdr_unsigned(nuidp->nu_nickname); 1100 *auth_str = (char *)nickp; 1101 *auth_len = 2 * NFSX_UNSIGNED; 1102 1103 /* 1104 * Now we must encrypt the verifier and package it up. 1105 */ 1106 verfp = (u_int32_t *)verf_str; 1107 *verfp++ = txdr_unsigned(RPCAKN_NICKNAME); 1108 if (time_second > nuidp->nu_timestamp.tv_sec || 1109 (time_second == nuidp->nu_timestamp.tv_sec && 1110 time_second > nuidp->nu_timestamp.tv_usec)) 1111 getmicrotime(&nuidp->nu_timestamp); 1112 else 1113 nuidp->nu_timestamp.tv_usec++; 1114 ktvin.tv_sec = txdr_unsigned(nuidp->nu_timestamp.tv_sec); 1115 ktvin.tv_usec = txdr_unsigned(nuidp->nu_timestamp.tv_usec); 1116 1117 /* 1118 * Now encrypt the timestamp verifier in ecb mode using the session 1119 * key. 1120 */ 1121#ifdef NFSKERB 1122 XXX 1123#endif 1124 1125 *verfp++ = ktvout.tv_sec; 1126 *verfp++ = ktvout.tv_usec; 1127 *verfp = 0; 1128 return (0); 1129} 1130 1131/* 1132 * Save the current nickname in a hash list entry on the mount point. 1133 */ 1134int 1135nfs_savenickauth(nmp, cred, len, key, mdp, dposp, mrep) 1136 register struct nfsmount *nmp; 1137 struct ucred *cred; 1138 int len; 1139 NFSKERBKEY_T key; 1140 struct mbuf **mdp; 1141 char **dposp; 1142 struct mbuf *mrep; 1143{ 1144 register struct nfsuid *nuidp; 1145 register u_int32_t *tl; 1146 register int32_t t1; 1147 struct mbuf *md = *mdp; 1148 struct timeval ktvin, ktvout; 1149 u_int32_t nick; 1150 char *dpos = *dposp, *cp2; 1151 int deltasec, error = 0; 1152 1153 if (len == (3 * NFSX_UNSIGNED)) { 1154 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 1155 ktvin.tv_sec = *tl++; 1156 ktvin.tv_usec = *tl++; 1157 nick = fxdr_unsigned(u_int32_t, *tl); 1158 1159 /* 1160 * Decrypt the timestamp in ecb mode. 1161 */ 1162#ifdef NFSKERB 1163 XXX 1164#endif 1165 ktvout.tv_sec = fxdr_unsigned(long, ktvout.tv_sec); 1166 ktvout.tv_usec = fxdr_unsigned(long, ktvout.tv_usec); 1167 deltasec = time_second - ktvout.tv_sec; 1168 if (deltasec < 0) 1169 deltasec = -deltasec; 1170 /* 1171 * If ok, add it to the hash list for the mount point. 1172 */ 1173 if (deltasec <= NFS_KERBCLOCKSKEW) { 1174 if (nmp->nm_numuids < nuidhash_max) { 1175 nmp->nm_numuids++; 1176 nuidp = (struct nfsuid *) 1177 malloc(sizeof (struct nfsuid), M_NFSUID, 1178 M_WAITOK); 1179 } else { 1180 nuidp = nmp->nm_uidlruhead.tqh_first; 1181 LIST_REMOVE(nuidp, nu_hash); 1182 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, 1183 nu_lru); 1184 } 1185 nuidp->nu_flag = 0; 1186 nuidp->nu_cr.cr_uid = cred->cr_uid; 1187 nuidp->nu_expire = time_second + NFS_KERBTTL; 1188 nuidp->nu_timestamp = ktvout; 1189 nuidp->nu_nickname = nick; 1190 bcopy(key, nuidp->nu_key, sizeof (key)); 1191 TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, 1192 nu_lru); 1193 LIST_INSERT_HEAD(NMUIDHASH(nmp, cred->cr_uid), 1194 nuidp, nu_hash); 1195 } 1196 } else 1197 nfsm_adv(nfsm_rndup(len)); 1198nfsmout: 1199 *mdp = md; 1200 *dposp = dpos; 1201 return (error); 1202} 1203