nfs_nfsiod.c revision 83366
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 83366 2001-09-12 08:38:13Z julian $ 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 thread *td, 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 thread *)); 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 thread *)); 114static int nfssvc_nfsd __P((struct nfsd_srvargs *,caddr_t, 115 struct thread *)); 116 117static int nfs_privport = 0; 118SYSCTL_INT(_vfs_nfs, NFS_NFSPRIVPORT, nfs_privport, CTLFLAG_RW, &nfs_privport, 0, ""); 119SYSCTL_INT(_vfs_nfs, OID_AUTO, gatherdelay, CTLFLAG_RW, &nfsrvw_procrastinate, 0, ""); 120SYSCTL_INT(_vfs_nfs, OID_AUTO, gatherdelay_v3, CTLFLAG_RW, &nfsrvw_procrastinate_v3, 0, ""); 121 122/* 123 * NFS server system calls 124 */ 125 126#endif /* NFS_NOSERVER */ 127/* 128 * Nfs server psuedo system call for the nfsd's 129 * Based on the flag value it either: 130 * - adds a socket to the selection list 131 * - remains in the kernel as an nfsd 132 * - remains in the kernel as an nfsiod 133 */ 134#ifndef _SYS_SYSPROTO_H_ 135struct nfssvc_args { 136 int flag; 137 caddr_t argp; 138}; 139#endif 140/* 141 * MPSAFE 142 */ 143int 144nfssvc(td, uap) 145 struct thread *td; 146 register struct nfssvc_args *uap; 147{ 148#ifndef NFS_NOSERVER 149 struct nameidata nd; 150 struct file *fp; 151 struct sockaddr *nam; 152 struct nfsd_args nfsdarg; 153 struct nfsd_srvargs nfsd_srvargs, *nsd = &nfsd_srvargs; 154 struct nfsd_cargs ncd; 155 struct nfsd *nfsd; 156 struct nfssvc_sock *slp; 157 struct nfsuid *nuidp; 158 struct nfsmount *nmp; 159#endif /* NFS_NOSERVER */ 160 int error; 161 162 mtx_lock(&Giant); 163 164 if ((uap->flag & NFSSVC_LOCKDANS) != 0) { 165 struct lockd_ans la; 166 167 error = copyin(uap->argp, &la, sizeof(la)); 168 if (error == 0) 169 error = nfslockdans(td->td_proc, &la); 170 goto done2; 171 } 172 /* 173 * Must be super user 174 */ 175 error = suser_td(td); 176 if (error) 177 goto done2; 178 while (nfssvc_sockhead_flag & SLP_INIT) { 179 nfssvc_sockhead_flag |= SLP_WANTINIT; 180 (void) tsleep((caddr_t)&nfssvc_sockhead, PSOCK, "nfsd init", 0); 181 } 182 if (uap->flag & NFSSVC_BIOD) 183 error = nfssvc_iod(td); 184#ifdef NFS_NOSERVER 185 else 186 error = ENXIO; 187#else /* !NFS_NOSERVER */ 188 else if (uap->flag & NFSSVC_MNTD) { 189 error = copyin(uap->argp, (caddr_t)&ncd, sizeof (ncd)); 190 if (error) 191 goto done2; 192 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 193 ncd.ncd_dirp, td); 194 error = namei(&nd); 195 if (error) 196 goto done2; 197 NDFREE(&nd, NDF_ONLY_PNBUF); 198 if ((nd.ni_vp->v_flag & VROOT) == 0) 199 error = EINVAL; 200 nmp = VFSTONFS(nd.ni_vp->v_mount); 201 vput(nd.ni_vp); 202 if (error) 203 goto done2; 204 if ((nmp->nm_state & NFSSTA_MNTD) && 205 (uap->flag & NFSSVC_GOTAUTH) == 0) { 206 error = 0; 207 goto done2; 208 } 209 nmp->nm_state |= NFSSTA_MNTD; 210 error = nqnfs_clientd(nmp, td->td_proc->p_ucred, &ncd, uap->flag, 211 uap->argp, td); 212 } else if (uap->flag & NFSSVC_ADDSOCK) { 213 error = copyin(uap->argp, (caddr_t)&nfsdarg, sizeof(nfsdarg)); 214 if (error) 215 goto done2; 216 error = holdsock(td->td_proc->p_fd, nfsdarg.sock, &fp); 217 if (error) 218 goto done2; 219 /* 220 * Get the client address for connected sockets. 221 */ 222 if (nfsdarg.name == NULL || nfsdarg.namelen == 0) 223 nam = (struct sockaddr *)0; 224 else { 225 error = getsockaddr(&nam, nfsdarg.name, 226 nfsdarg.namelen); 227 if (error) { 228 fdrop(fp, td); 229 goto done2; 230 } 231 } 232 error = nfssvc_addsock(fp, nam, td); 233 fdrop(fp, td); 234 } else { 235 error = copyin(uap->argp, (caddr_t)nsd, sizeof (*nsd)); 236 if (error) 237 goto done2; 238 if ((uap->flag & NFSSVC_AUTHIN) && 239 ((nfsd = nsd->nsd_nfsd)) != NULL && 240 (nfsd->nfsd_slp->ns_flag & SLP_VALID)) { 241 slp = nfsd->nfsd_slp; 242 243 /* 244 * First check to see if another nfsd has already 245 * added this credential. 246 */ 247 for (nuidp = NUIDHASH(slp,nsd->nsd_cr.cr_uid)->lh_first; 248 nuidp != 0; nuidp = nuidp->nu_hash.le_next) { 249 if (nuidp->nu_cr.cr_uid == nsd->nsd_cr.cr_uid && 250 (!nfsd->nfsd_nd->nd_nam2 || 251 netaddr_match(NU_NETFAM(nuidp), 252 &nuidp->nu_haddr, nfsd->nfsd_nd->nd_nam2))) 253 break; 254 } 255 if (nuidp) { 256 nfsrv_setcred(&nuidp->nu_cr,&nfsd->nfsd_nd->nd_cr); 257 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL; 258 } else { 259 /* 260 * Nope, so we will. 261 */ 262 if (slp->ns_numuids < nuidhash_max) { 263 slp->ns_numuids++; 264 nuidp = (struct nfsuid *) 265 malloc(sizeof (struct nfsuid), M_NFSUID, 266 M_WAITOK); 267 } else 268 nuidp = (struct nfsuid *)0; 269 if ((slp->ns_flag & SLP_VALID) == 0) { 270 if (nuidp) 271 free((caddr_t)nuidp, M_NFSUID); 272 } else { 273 if (nuidp == (struct nfsuid *)0) { 274 nuidp = slp->ns_uidlruhead.tqh_first; 275 LIST_REMOVE(nuidp, nu_hash); 276 TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, 277 nu_lru); 278 if (nuidp->nu_flag & NU_NAM) 279 FREE(nuidp->nu_nam, M_SONAME); 280 } 281 nuidp->nu_flag = 0; 282 bzero(&nuidp->nu_cr, sizeof(nuidp->nu_cr)); 283 nuidp->nu_cr.cr_uid = nsd->nsd_cr.cr_uid; 284 nuidp->nu_cr.cr_ngroups = 285 nsd->nsd_cr.cr_ngroups; 286 bcopy(nsd->nsd_cr.cr_groups, 287 nuidp->nu_cr.cr_groups, 288 sizeof(nuidp->nu_cr.cr_groups)); 289 if (nuidp->nu_cr.cr_ngroups > NGROUPS) 290 nuidp->nu_cr.cr_ngroups = NGROUPS; 291 nuidp->nu_cr.cr_ref = 1; 292 nuidp->nu_timestamp = nsd->nsd_timestamp; 293 nuidp->nu_expire = time_second + nsd->nsd_ttl; 294 /* 295 * and save the session key in nu_key. 296 */ 297 bcopy(nsd->nsd_key, nuidp->nu_key, 298 sizeof (nsd->nsd_key)); 299 if (nfsd->nfsd_nd->nd_nam2) { 300 struct sockaddr_in *saddr; 301 302 saddr = (struct sockaddr_in *) 303 nfsd->nfsd_nd->nd_nam2; 304 switch (saddr->sin_family) { 305 case AF_INET: 306 nuidp->nu_flag |= NU_INETADDR; 307 nuidp->nu_inetaddr = 308 saddr->sin_addr.s_addr; 309 break; 310 case AF_ISO: 311 default: 312 nuidp->nu_flag |= NU_NAM; 313 nuidp->nu_nam = 314 dup_sockaddr(nfsd->nfsd_nd-> 315 nd_nam2, 1); 316 break; 317 }; 318 } 319 TAILQ_INSERT_TAIL(&slp->ns_uidlruhead, nuidp, 320 nu_lru); 321 LIST_INSERT_HEAD(NUIDHASH(slp, nsd->nsd_uid), 322 nuidp, nu_hash); 323 nfsrv_setcred(&nuidp->nu_cr, 324 &nfsd->nfsd_nd->nd_cr); 325 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL; 326 } 327 } 328 } 329 if ((uap->flag & NFSSVC_AUTHINFAIL) && (nfsd = nsd->nsd_nfsd)) 330 nfsd->nfsd_flag |= NFSD_AUTHFAIL; 331 error = nfssvc_nfsd(nsd, uap->argp, td); 332 } 333#endif /* NFS_NOSERVER */ 334 if (error == EINTR || error == ERESTART) 335 error = 0; 336done2: 337 mtx_unlock(&Giant); 338 return (error); 339} 340 341#ifndef NFS_NOSERVER 342/* 343 * Adds a socket to the list for servicing by nfsds. 344 */ 345static int 346nfssvc_addsock(fp, mynam, td) 347 struct file *fp; 348 struct sockaddr *mynam; 349 struct thread *td; 350{ 351 register int siz; 352 register struct nfssvc_sock *slp; 353 register struct socket *so; 354 int error, s; 355 356 so = (struct socket *)fp->f_data; 357#if 0 358 tslp = (struct nfssvc_sock *)0; 359 /* 360 * Add it to the list, as required. 361 */ 362 if (so->so_proto->pr_protocol == IPPROTO_UDP) { 363 tslp = nfs_udpsock; 364 if (tslp->ns_flag & SLP_VALID) { 365 if (mynam != NULL) 366 FREE(mynam, M_SONAME); 367 return (EPERM); 368 } 369 } 370#endif 371 if (so->so_type == SOCK_STREAM) 372 siz = NFS_MAXPACKET + sizeof (u_long); 373 else 374 siz = NFS_MAXPACKET; 375 error = soreserve(so, siz, siz); 376 if (error) { 377 if (mynam != NULL) 378 FREE(mynam, M_SONAME); 379 return (error); 380 } 381 382 /* 383 * Set protocol specific options { for now TCP only } and 384 * reserve some space. For datagram sockets, this can get called 385 * repeatedly for the same socket, but that isn't harmful. 386 */ 387 if (so->so_type == SOCK_STREAM) { 388 struct sockopt sopt; 389 int val; 390 391 bzero(&sopt, sizeof sopt); 392 sopt.sopt_level = SOL_SOCKET; 393 sopt.sopt_name = SO_KEEPALIVE; 394 sopt.sopt_val = &val; 395 sopt.sopt_valsize = sizeof val; 396 val = 1; 397 sosetopt(so, &sopt); 398 } 399 if (so->so_proto->pr_domain->dom_family == AF_INET && 400 so->so_proto->pr_protocol == IPPROTO_TCP) { 401 struct sockopt sopt; 402 int val; 403 404 bzero(&sopt, sizeof sopt); 405 sopt.sopt_level = IPPROTO_TCP; 406 sopt.sopt_name = TCP_NODELAY; 407 sopt.sopt_val = &val; 408 sopt.sopt_valsize = sizeof val; 409 val = 1; 410 sosetopt(so, &sopt); 411 } 412 so->so_rcv.sb_flags &= ~SB_NOINTR; 413 so->so_rcv.sb_timeo = 0; 414 so->so_snd.sb_flags &= ~SB_NOINTR; 415 so->so_snd.sb_timeo = 0; 416 417 slp = (struct nfssvc_sock *) 418 malloc(sizeof (struct nfssvc_sock), M_NFSSVC, 419 M_WAITOK | M_ZERO); 420 STAILQ_INIT(&slp->ns_rec); 421 TAILQ_INIT(&slp->ns_uidlruhead); 422 TAILQ_INSERT_TAIL(&nfssvc_sockhead, slp, ns_chain); 423 424 slp->ns_so = so; 425 slp->ns_nam = mynam; 426 fp->f_count++; 427 slp->ns_fp = fp; 428 s = splnet(); 429 so->so_upcallarg = (caddr_t)slp; 430 so->so_upcall = nfsrv_rcv; 431 so->so_rcv.sb_flags |= SB_UPCALL; 432 slp->ns_flag = (SLP_VALID | SLP_NEEDQ); 433 nfsrv_wakenfsd(slp); 434 splx(s); 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 */ 442static int 443nfssvc_nfsd(nsd, argp, td) 444 struct nfsd_srvargs *nsd; 445 caddr_t argp; 446 struct thread *td; 447{ 448 register int siz; 449 register struct nfssvc_sock *slp; 450 struct nfsd *nfsd = nsd->nsd_nfsd; 451 struct nfsrv_descript *nd = NULL; 452 struct mbuf *m, *mreq; 453 int error = 0, cacherep, s, sotype, writes_todo; 454 int procrastinate; 455 u_quad_t cur_usec; 456 457#ifndef nolint 458 cacherep = RC_DOIT; 459 writes_todo = 0; 460#endif 461 if (nfsd == (struct nfsd *)0) { 462 nsd->nsd_nfsd = nfsd = (struct nfsd *) 463 malloc(sizeof (struct nfsd), M_NFSD, M_WAITOK | M_ZERO); 464 s = splnet(); 465 nfsd->nfsd_td = td; 466 TAILQ_INSERT_TAIL(&nfsd_head, nfsd, nfsd_chain); 467 nfs_numnfsd++; 468 } else 469 s = splnet(); 470 471 /* 472 * Loop getting rpc requests until SIGKILL. 473 */ 474 for (;;) { 475 if ((nfsd->nfsd_flag & NFSD_REQINPROG) == 0) { 476 while (nfsd->nfsd_slp == (struct nfssvc_sock *)0 && 477 (nfsd_head_flag & NFSD_CHECKSLP) == 0) { 478 nfsd->nfsd_flag |= NFSD_WAITING; 479 nfsd_waiting++; 480 error = tsleep((caddr_t)nfsd, PSOCK | PCATCH, 481 "nfsd", 0); 482 nfsd_waiting--; 483 if (error) 484 goto done; 485 } 486 if (nfsd->nfsd_slp == (struct nfssvc_sock *)0 && 487 (nfsd_head_flag & NFSD_CHECKSLP) != 0) { 488 for (slp = nfssvc_sockhead.tqh_first; slp != 0; 489 slp = slp->ns_chain.tqe_next) { 490 if ((slp->ns_flag & (SLP_VALID | SLP_DOREC)) 491 == (SLP_VALID | SLP_DOREC)) { 492 slp->ns_flag &= ~SLP_DOREC; 493 slp->ns_sref++; 494 nfsd->nfsd_slp = slp; 495 break; 496 } 497 } 498 if (slp == 0) 499 nfsd_head_flag &= ~NFSD_CHECKSLP; 500 } 501 if ((slp = nfsd->nfsd_slp) == (struct nfssvc_sock *)0) 502 continue; 503 if (slp->ns_flag & SLP_VALID) { 504 if (slp->ns_flag & SLP_DISCONN) 505 nfsrv_zapsock(slp); 506 else if (slp->ns_flag & SLP_NEEDQ) { 507 slp->ns_flag &= ~SLP_NEEDQ; 508 (void) nfs_slplock(slp, 1); 509 nfsrv_rcv(slp->ns_so, (caddr_t)slp, 510 M_TRYWAIT); 511 nfs_slpunlock(slp); 512 } 513 error = nfsrv_dorec(slp, nfsd, &nd); 514 cur_usec = nfs_curusec(); 515 if (error && slp->ns_tq.lh_first && 516 slp->ns_tq.lh_first->nd_time <= cur_usec) { 517 error = 0; 518 cacherep = RC_DOIT; 519 writes_todo = 1; 520 } else 521 writes_todo = 0; 522 nfsd->nfsd_flag |= NFSD_REQINPROG; 523 } 524 } else { 525 error = 0; 526 slp = nfsd->nfsd_slp; 527 } 528 if (error || (slp->ns_flag & SLP_VALID) == 0) { 529 if (nd) { 530 free((caddr_t)nd, M_NFSRVDESC); 531 nd = NULL; 532 } 533 nfsd->nfsd_slp = (struct nfssvc_sock *)0; 534 nfsd->nfsd_flag &= ~NFSD_REQINPROG; 535 nfsrv_slpderef(slp); 536 continue; 537 } 538 splx(s); 539 sotype = slp->ns_so->so_type; 540 if (nd) { 541 getmicrotime(&nd->nd_starttime); 542 if (nd->nd_nam2) 543 nd->nd_nam = nd->nd_nam2; 544 else 545 nd->nd_nam = slp->ns_nam; 546 547 /* 548 * Check to see if authorization is needed. 549 */ 550 if (nfsd->nfsd_flag & NFSD_NEEDAUTH) { 551 nfsd->nfsd_flag &= ~NFSD_NEEDAUTH; 552 nsd->nsd_haddr = 553 ((struct sockaddr_in *) 554 nd->nd_nam)->sin_addr.s_addr; 555 nsd->nsd_authlen = nfsd->nfsd_authlen; 556 nsd->nsd_verflen = nfsd->nfsd_verflen; 557 if (!copyout(nfsd->nfsd_authstr,nsd->nsd_authstr, 558 nfsd->nfsd_authlen) && 559 !copyout(nfsd->nfsd_verfstr, nsd->nsd_verfstr, 560 nfsd->nfsd_verflen) && 561 !copyout((caddr_t)nsd, argp, sizeof (*nsd))) 562 return (ENEEDAUTH); 563 cacherep = RC_DROPIT; 564 } else 565 cacherep = nfsrv_getcache(nd, slp, &mreq); 566 567 /* 568 * Check for just starting up for NQNFS and send 569 * fake "try again later" replies to the NQNFS clients. 570 */ 571 if (notstarted && nqnfsstarttime <= time_second) { 572 if (modify_flag) { 573 nqnfsstarttime = time_second + nqsrv_writeslack; 574 modify_flag = 0; 575 } else 576 notstarted = 0; 577 } 578 if (notstarted) { 579 if ((nd->nd_flag & ND_NQNFS) == 0) 580 cacherep = RC_DROPIT; 581 else if (nd->nd_procnum != NFSPROC_WRITE) { 582 nd->nd_procnum = NFSPROC_NOOP; 583 nd->nd_repstat = NQNFS_TRYLATER; 584 cacherep = RC_DOIT; 585 } else 586 modify_flag = 1; 587 } else if (nfsd->nfsd_flag & NFSD_AUTHFAIL) { 588 nfsd->nfsd_flag &= ~NFSD_AUTHFAIL; 589 nd->nd_procnum = NFSPROC_NOOP; 590 nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK); 591 cacherep = RC_DOIT; 592 } else if (nfs_privport) { 593 /* Check if source port is privileged */ 594 u_short port; 595 struct sockaddr *nam = nd->nd_nam; 596 struct sockaddr_in *sin; 597 598 sin = (struct sockaddr_in *)nam; 599 port = ntohs(sin->sin_port); 600 if (port >= IPPORT_RESERVED && 601 nd->nd_procnum != NFSPROC_NULL) { 602 nd->nd_procnum = NFSPROC_NOOP; 603 nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK); 604 cacherep = RC_DOIT; 605 printf("NFS request from unprivileged port (%s:%d)\n", 606 inet_ntoa(sin->sin_addr), port); 607 } 608 } 609 610 } 611 612 /* 613 * Loop to get all the write rpc relies that have been 614 * gathered together. 615 */ 616 do { 617 switch (cacherep) { 618 case RC_DOIT: 619 if (nd && (nd->nd_flag & ND_NFSV3)) 620 procrastinate = nfsrvw_procrastinate_v3; 621 else 622 procrastinate = nfsrvw_procrastinate; 623 if (writes_todo || (nd->nd_procnum == NFSPROC_WRITE && 624 procrastinate > 0 && !notstarted)) 625 error = nfsrv_writegather(&nd, slp, 626 nfsd->nfsd_td, &mreq); 627 else 628 error = (*(nfsrv3_procs[nd->nd_procnum]))(nd, 629 slp, nfsd->nfsd_td, &mreq); 630 if (mreq == NULL) 631 break; 632 if (error != 0 && error != NFSERR_RETVOID) { 633 if (nd->nd_procnum != NQNFSPROC_VACATED) 634 nfsstats.srv_errs++; 635 nfsrv_updatecache(nd, FALSE, mreq); 636 if (nd->nd_nam2) 637 FREE(nd->nd_nam2, M_SONAME); 638 break; 639 } 640 nfsstats.srvrpccnt[nd->nd_procnum]++; 641 nfsrv_updatecache(nd, TRUE, mreq); 642 nd->nd_mrep = (struct mbuf *)0; 643 case RC_REPLY: 644 m = mreq; 645 siz = 0; 646 while (m) { 647 siz += m->m_len; 648 m = m->m_next; 649 } 650 if (siz <= 0 || siz > NFS_MAXPACKET) { 651 printf("mbuf siz=%d\n",siz); 652 panic("Bad nfs svc reply"); 653 } 654 m = mreq; 655 m->m_pkthdr.len = siz; 656 m->m_pkthdr.rcvif = (struct ifnet *)0; 657 /* 658 * For stream protocols, prepend a Sun RPC 659 * Record Mark. 660 */ 661 if (sotype == SOCK_STREAM) { 662 M_PREPEND(m, NFSX_UNSIGNED, M_TRYWAIT); 663 *mtod(m, u_int32_t *) = htonl(0x80000000 | siz); 664 } 665 if (slp->ns_so->so_proto->pr_flags & PR_CONNREQUIRED) 666 (void) nfs_slplock(slp, 1); 667 if (slp->ns_flag & SLP_VALID) 668 error = nfs_send(slp->ns_so, nd->nd_nam2, m, NULL); 669 else { 670 error = EPIPE; 671 m_freem(m); 672 } 673 if (nfsrtton) 674 nfsd_rt(sotype, nd, cacherep); 675 if (nd->nd_nam2) 676 FREE(nd->nd_nam2, M_SONAME); 677 if (nd->nd_mrep) 678 m_freem(nd->nd_mrep); 679 if (error == EPIPE) 680 nfsrv_zapsock(slp); 681 if (slp->ns_so->so_proto->pr_flags & PR_CONNREQUIRED) 682 nfs_slpunlock(slp); 683 if (error == EINTR || error == ERESTART) { 684 free((caddr_t)nd, M_NFSRVDESC); 685 nfsrv_slpderef(slp); 686 s = splnet(); 687 goto done; 688 } 689 break; 690 case RC_DROPIT: 691 if (nfsrtton) 692 nfsd_rt(sotype, nd, cacherep); 693 m_freem(nd->nd_mrep); 694 if (nd->nd_nam2) 695 FREE(nd->nd_nam2, M_SONAME); 696 break; 697 }; 698 if (nd) { 699 FREE((caddr_t)nd, M_NFSRVDESC); 700 nd = NULL; 701 } 702 703 /* 704 * Check to see if there are outstanding writes that 705 * need to be serviced. 706 */ 707 cur_usec = nfs_curusec(); 708 s = splsoftclock(); 709 if (slp->ns_tq.lh_first && 710 slp->ns_tq.lh_first->nd_time <= cur_usec) { 711 cacherep = RC_DOIT; 712 writes_todo = 1; 713 } else 714 writes_todo = 0; 715 splx(s); 716 } while (writes_todo); 717 s = splnet(); 718 if (nfsrv_dorec(slp, nfsd, &nd)) { 719 nfsd->nfsd_flag &= ~NFSD_REQINPROG; 720 nfsd->nfsd_slp = NULL; 721 nfsrv_slpderef(slp); 722 } 723 } 724done: 725 TAILQ_REMOVE(&nfsd_head, nfsd, nfsd_chain); 726 splx(s); 727 free((caddr_t)nfsd, M_NFSD); 728 nsd->nsd_nfsd = (struct nfsd *)0; 729 if (--nfs_numnfsd == 0) 730 nfsrv_init(TRUE); /* Reinitialize everything */ 731 return (error); 732} 733 734/* 735 * Shut down a socket associated with an nfssvc_sock structure. 736 * Should be called with the send lock set, if required. 737 * The trick here is to increment the sref at the start, so that the nfsds 738 * will stop using it and clear ns_flag at the end so that it will not be 739 * reassigned during cleanup. 740 */ 741static void 742nfsrv_zapsock(slp) 743 register struct nfssvc_sock *slp; 744{ 745 register struct nfsuid *nuidp, *nnuidp; 746 register struct nfsrv_descript *nwp, *nnwp; 747 struct socket *so; 748 struct file *fp; 749 struct nfsrv_rec *rec; 750 int s; 751 752 slp->ns_flag &= ~SLP_ALLFLAGS; 753 fp = slp->ns_fp; 754 if (fp) { 755 slp->ns_fp = (struct file *)0; 756 so = slp->ns_so; 757 so->so_rcv.sb_flags &= ~SB_UPCALL; 758 so->so_upcall = NULL; 759 so->so_upcallarg = NULL; 760 soshutdown(so, 2); 761 closef(fp, (struct thread *)0); 762 if (slp->ns_nam) 763 FREE(slp->ns_nam, M_SONAME); 764 m_freem(slp->ns_raw); 765 while ((rec = STAILQ_FIRST(&slp->ns_rec)) != NULL) { 766 STAILQ_REMOVE_HEAD(&slp->ns_rec, nr_link); 767 if (rec->nr_address) 768 FREE(rec->nr_address, M_SONAME); 769 m_freem(rec->nr_packet); 770 free(rec, M_NFSRVDESC); 771 } 772 for (nuidp = slp->ns_uidlruhead.tqh_first; nuidp != 0; 773 nuidp = nnuidp) { 774 nnuidp = nuidp->nu_lru.tqe_next; 775 LIST_REMOVE(nuidp, nu_hash); 776 TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, nu_lru); 777 if (nuidp->nu_flag & NU_NAM) 778 FREE(nuidp->nu_nam, M_SONAME); 779 free((caddr_t)nuidp, M_NFSUID); 780 } 781 s = splsoftclock(); 782 for (nwp = slp->ns_tq.lh_first; nwp; nwp = nnwp) { 783 nnwp = nwp->nd_tq.le_next; 784 LIST_REMOVE(nwp, nd_tq); 785 free((caddr_t)nwp, M_NFSRVDESC); 786 } 787 LIST_INIT(&slp->ns_tq); 788 splx(s); 789 } 790} 791 792/* 793 * Derefence a server socket structure. If it has no more references and 794 * is no longer valid, you can throw it away. 795 */ 796void 797nfsrv_slpderef(slp) 798 register struct nfssvc_sock *slp; 799{ 800 if (--(slp->ns_sref) == 0 && (slp->ns_flag & SLP_VALID) == 0) { 801 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain); 802 free((caddr_t)slp, M_NFSSVC); 803 } 804} 805 806/* 807 * Lock a socket against others. 808 */ 809int 810nfs_slplock(slp, wait) 811 register struct nfssvc_sock *slp; 812 int wait; 813{ 814 int *statep = &slp->ns_solock; 815 816 if (!wait && (*statep & NFSSTA_SNDLOCK)) 817 return(0); /* already locked, fail */ 818 while (*statep & NFSSTA_SNDLOCK) { 819 *statep |= NFSSTA_WANTSND; 820 (void) tsleep((caddr_t)statep, PZERO - 1, "nfsslplck", 0); 821 } 822 *statep |= NFSSTA_SNDLOCK; 823 return (1); 824} 825 826/* 827 * Unlock the stream socket for others. 828 */ 829void 830nfs_slpunlock(slp) 831 register struct nfssvc_sock *slp; 832{ 833 int *statep = &slp->ns_solock; 834 835 if ((*statep & NFSSTA_SNDLOCK) == 0) 836 panic("nfs slpunlock"); 837 *statep &= ~NFSSTA_SNDLOCK; 838 if (*statep & NFSSTA_WANTSND) { 839 *statep &= ~NFSSTA_WANTSND; 840 wakeup((caddr_t)statep); 841 } 842} 843 844/* 845 * Initialize the data structures for the server. 846 * Handshake with any new nfsds starting up to avoid any chance of 847 * corruption. 848 */ 849void 850nfsrv_init(terminating) 851 int terminating; 852{ 853 register struct nfssvc_sock *slp, *nslp; 854 855 if (nfssvc_sockhead_flag & SLP_INIT) 856 panic("nfsd init"); 857 nfssvc_sockhead_flag |= SLP_INIT; 858 if (terminating) { 859 for (slp = nfssvc_sockhead.tqh_first; slp != 0; slp = nslp) { 860 nslp = slp->ns_chain.tqe_next; 861 if (slp->ns_flag & SLP_VALID) 862 nfsrv_zapsock(slp); 863 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain); 864 free((caddr_t)slp, M_NFSSVC); 865 } 866 nfsrv_cleancache(); /* And clear out server cache */ 867 } else 868 nfs_pub.np_valid = 0; 869 870 TAILQ_INIT(&nfssvc_sockhead); 871 nfssvc_sockhead_flag &= ~SLP_INIT; 872 if (nfssvc_sockhead_flag & SLP_WANTINIT) { 873 nfssvc_sockhead_flag &= ~SLP_WANTINIT; 874 wakeup((caddr_t)&nfssvc_sockhead); 875 } 876 877 TAILQ_INIT(&nfsd_head); 878 nfsd_head_flag &= ~NFSD_CHECKSLP; 879 880#if 0 881 nfs_udpsock = (struct nfssvc_sock *) 882 malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK | M_ZERO); 883 STAILQ_INIT(&nfs_udpsock->ns_rec); 884 TAILQ_INIT(&nfs_udpsock->ns_uidlruhead); 885 TAILQ_INSERT_HEAD(&nfssvc_sockhead, nfs_udpsock, ns_chain); 886 887 nfs_cltpsock = (struct nfssvc_sock *) 888 malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK | M_ZERO); 889 STAILQ_INIT(&nfs_cltpsock->ns_rec); 890 TAILQ_INIT(&nfs_cltpsock->ns_uidlruhead); 891 TAILQ_INSERT_TAIL(&nfssvc_sockhead, nfs_cltpsock, ns_chain); 892#endif 893} 894 895/* 896 * Add entries to the server monitor log. 897 */ 898static void 899nfsd_rt(sotype, nd, cacherep) 900 int sotype; 901 register struct nfsrv_descript *nd; 902 int cacherep; 903{ 904 register struct drt *rt; 905 906 rt = &nfsdrt.drt[nfsdrt.pos]; 907 if (cacherep == RC_DOIT) 908 rt->flag = 0; 909 else if (cacherep == RC_REPLY) 910 rt->flag = DRT_CACHEREPLY; 911 else 912 rt->flag = DRT_CACHEDROP; 913 if (sotype == SOCK_STREAM) 914 rt->flag |= DRT_TCP; 915 if (nd->nd_flag & ND_NQNFS) 916 rt->flag |= DRT_NQNFS; 917 else if (nd->nd_flag & ND_NFSV3) 918 rt->flag |= DRT_NFSV3; 919 rt->proc = nd->nd_procnum; 920 if (nd->nd_nam->sa_family == AF_INET) 921 rt->ipadr = ((struct sockaddr_in *)nd->nd_nam)->sin_addr.s_addr; 922 else 923 rt->ipadr = INADDR_ANY; 924 rt->resptime = nfs_curusec() - (nd->nd_starttime.tv_sec * 1000000 + nd->nd_starttime.tv_usec); 925 getmicrotime(&rt->tstamp); 926 nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ; 927} 928#endif /* NFS_NOSERVER */ 929 930static int nfs_defect = 0; 931SYSCTL_INT(_vfs_nfs, OID_AUTO, defect, CTLFLAG_RW, &nfs_defect, 0, ""); 932 933/* 934 * Asynchronous I/O daemons for client nfs. 935 * They do read-ahead and write-behind operations on the block I/O cache. 936 * Never returns unless it fails or gets killed. 937 */ 938static int 939nfssvc_iod(td) 940 struct thread *td; 941{ 942 register struct buf *bp; 943 register int i, myiod; 944 struct nfsmount *nmp; 945 int error = 0; 946 947 /* 948 * Assign my position or return error if too many already running 949 */ 950 myiod = -1; 951 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) 952 if (nfs_asyncdaemon[i] == 0) { 953 nfs_asyncdaemon[i]++; 954 myiod = i; 955 break; 956 } 957 if (myiod == -1) 958 return (EBUSY); 959 nfs_numasync++; 960 /* 961 * Just loop around doin our stuff until SIGKILL 962 */ 963 for (;;) { 964 while (((nmp = nfs_iodmount[myiod]) == NULL 965 || nmp->nm_bufq.tqh_first == NULL) 966 && error == 0) { 967 if (nmp) 968 nmp->nm_bufqiods--; 969 nfs_iodwant[myiod] = td->td_proc; 970 nfs_iodmount[myiod] = NULL; 971 error = tsleep((caddr_t)&nfs_iodwant[myiod], 972 PWAIT | PCATCH, "nfsidl", 0); 973 } 974 if (error) { 975 nfs_asyncdaemon[myiod] = 0; 976 if (nmp) 977 nmp->nm_bufqiods--; 978 nfs_iodwant[myiod] = NULL; 979 nfs_iodmount[myiod] = NULL; 980 nfs_numasync--; 981 return (error); 982 } 983 while ((bp = nmp->nm_bufq.tqh_first) != NULL) { 984 /* Take one off the front of the list */ 985 TAILQ_REMOVE(&nmp->nm_bufq, bp, b_freelist); 986 nmp->nm_bufqlen--; 987 if (nmp->nm_bufqwant && nmp->nm_bufqlen <= nfs_numasync) { 988 nmp->nm_bufqwant = FALSE; 989 wakeup(&nmp->nm_bufq); 990 } 991 if (bp->b_iocmd == BIO_READ) 992 (void) nfs_doio(bp, bp->b_rcred, (struct thread *)0); 993 else 994 (void) nfs_doio(bp, bp->b_wcred, (struct thread *)0); 995 /* 996 * If there are more than one iod on this mount, then defect 997 * so that the iods can be shared out fairly between the mounts 998 */ 999 if (nfs_defect && nmp->nm_bufqiods > 1) { 1000 NFS_DPF(ASYNCIO, 1001 ("nfssvc_iod: iod %d defecting from mount %p\n", 1002 myiod, nmp)); 1003 nfs_iodmount[myiod] = NULL; 1004 nmp->nm_bufqiods--; 1005 break; 1006 } 1007 } 1008 } 1009} 1010 1011 1012/* 1013 * Get an authorization string for the uid by having the mount_nfs sitting 1014 * on this mount point porpous out of the kernel and do it. 1015 */ 1016int 1017nfs_getauth(nmp, rep, cred, auth_str, auth_len, verf_str, verf_len, key) 1018 register struct nfsmount *nmp; 1019 struct nfsreq *rep; 1020 struct ucred *cred; 1021 char **auth_str; 1022 int *auth_len; 1023 char *verf_str; 1024 int *verf_len; 1025 NFSKERBKEY_T key; /* return session key */ 1026{ 1027 int error = 0; 1028 1029 while ((nmp->nm_state & NFSSTA_WAITAUTH) == 0) { 1030 nmp->nm_state |= NFSSTA_WANTAUTH; 1031 (void) tsleep((caddr_t)&nmp->nm_authtype, PSOCK, 1032 "nfsauth1", 2 * hz); 1033 error = nfs_sigintr(nmp, rep, rep->r_td->td_proc); 1034 if (error) { 1035 nmp->nm_state &= ~NFSSTA_WANTAUTH; 1036 return (error); 1037 } 1038 } 1039 nmp->nm_state &= ~(NFSSTA_WAITAUTH | NFSSTA_WANTAUTH); 1040 nmp->nm_authstr = *auth_str = (char *)malloc(RPCAUTH_MAXSIZ, M_TEMP, M_WAITOK); 1041 nmp->nm_authlen = RPCAUTH_MAXSIZ; 1042 nmp->nm_verfstr = verf_str; 1043 nmp->nm_verflen = *verf_len; 1044 nmp->nm_authuid = cred->cr_uid; 1045 wakeup((caddr_t)&nmp->nm_authstr); 1046 1047 /* 1048 * And wait for mount_nfs to do its stuff. 1049 */ 1050 while ((nmp->nm_state & NFSSTA_HASAUTH) == 0 && error == 0) { 1051 (void) tsleep((caddr_t)&nmp->nm_authlen, PSOCK, 1052 "nfsauth2", 2 * hz); 1053 error = nfs_sigintr(nmp, rep, rep->r_td->td_proc); 1054 } 1055 if (nmp->nm_state & NFSSTA_AUTHERR) { 1056 nmp->nm_state &= ~NFSSTA_AUTHERR; 1057 error = EAUTH; 1058 } 1059 if (error) 1060 free((caddr_t)*auth_str, M_TEMP); 1061 else { 1062 *auth_len = nmp->nm_authlen; 1063 *verf_len = nmp->nm_verflen; 1064 bcopy((caddr_t)nmp->nm_key, (caddr_t)key, sizeof (key)); 1065 } 1066 nmp->nm_state &= ~NFSSTA_HASAUTH; 1067 nmp->nm_state |= NFSSTA_WAITAUTH; 1068 if (nmp->nm_state & NFSSTA_WANTAUTH) { 1069 nmp->nm_state &= ~NFSSTA_WANTAUTH; 1070 wakeup((caddr_t)&nmp->nm_authtype); 1071 } 1072 return (error); 1073} 1074 1075/* 1076 * Get a nickname authenticator and verifier. 1077 */ 1078int 1079nfs_getnickauth(nmp, cred, auth_str, auth_len, verf_str, verf_len) 1080 struct nfsmount *nmp; 1081 struct ucred *cred; 1082 char **auth_str; 1083 int *auth_len; 1084 char *verf_str; 1085 int verf_len; 1086{ 1087 register struct nfsuid *nuidp; 1088 register u_int32_t *nickp, *verfp; 1089 struct timeval ktvin, ktvout; 1090 1091#ifdef DIAGNOSTIC 1092 if (verf_len < (4 * NFSX_UNSIGNED)) 1093 panic("nfs_getnickauth verf too small"); 1094#endif 1095 for (nuidp = NMUIDHASH(nmp, cred->cr_uid)->lh_first; 1096 nuidp != 0; nuidp = nuidp->nu_hash.le_next) { 1097 if (nuidp->nu_cr.cr_uid == cred->cr_uid) 1098 break; 1099 } 1100 if (!nuidp || nuidp->nu_expire < time_second) 1101 return (EACCES); 1102 1103 /* 1104 * Move to the end of the lru list (end of lru == most recently used). 1105 */ 1106 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru); 1107 TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, nu_lru); 1108 1109 nickp = (u_int32_t *)malloc(2 * NFSX_UNSIGNED, M_TEMP, M_WAITOK); 1110 *nickp++ = txdr_unsigned(RPCAKN_NICKNAME); 1111 *nickp = txdr_unsigned(nuidp->nu_nickname); 1112 *auth_str = (char *)nickp; 1113 *auth_len = 2 * NFSX_UNSIGNED; 1114 1115 /* 1116 * Now we must encrypt the verifier and package it up. 1117 */ 1118 verfp = (u_int32_t *)verf_str; 1119 *verfp++ = txdr_unsigned(RPCAKN_NICKNAME); 1120 if (time_second > nuidp->nu_timestamp.tv_sec || 1121 (time_second == nuidp->nu_timestamp.tv_sec && 1122 time_second > nuidp->nu_timestamp.tv_usec)) 1123 getmicrotime(&nuidp->nu_timestamp); 1124 else 1125 nuidp->nu_timestamp.tv_usec++; 1126 ktvin.tv_sec = txdr_unsigned(nuidp->nu_timestamp.tv_sec); 1127 ktvin.tv_usec = txdr_unsigned(nuidp->nu_timestamp.tv_usec); 1128 1129 /* 1130 * Now encrypt the timestamp verifier in ecb mode using the session 1131 * key. 1132 */ 1133#ifdef NFSKERB 1134 XXX 1135#endif 1136 1137 *verfp++ = ktvout.tv_sec; 1138 *verfp++ = ktvout.tv_usec; 1139 *verfp = 0; 1140 return (0); 1141} 1142 1143/* 1144 * Save the current nickname in a hash list entry on the mount point. 1145 */ 1146int 1147nfs_savenickauth(nmp, cred, len, key, mdp, dposp, mrep) 1148 register struct nfsmount *nmp; 1149 struct ucred *cred; 1150 int len; 1151 NFSKERBKEY_T key; 1152 struct mbuf **mdp; 1153 char **dposp; 1154 struct mbuf *mrep; 1155{ 1156 register struct nfsuid *nuidp; 1157 register u_int32_t *tl; 1158 register int32_t t1; 1159 struct mbuf *md = *mdp; 1160 struct timeval ktvin, ktvout; 1161 u_int32_t nick; 1162 char *dpos = *dposp, *cp2; 1163 int deltasec, error = 0; 1164 1165 if (len == (3 * NFSX_UNSIGNED)) { 1166 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 1167 ktvin.tv_sec = *tl++; 1168 ktvin.tv_usec = *tl++; 1169 nick = fxdr_unsigned(u_int32_t, *tl); 1170 1171 /* 1172 * Decrypt the timestamp in ecb mode. 1173 */ 1174#ifdef NFSKERB 1175 XXX 1176#endif 1177 ktvout.tv_sec = fxdr_unsigned(long, ktvout.tv_sec); 1178 ktvout.tv_usec = fxdr_unsigned(long, ktvout.tv_usec); 1179 deltasec = time_second - ktvout.tv_sec; 1180 if (deltasec < 0) 1181 deltasec = -deltasec; 1182 /* 1183 * If ok, add it to the hash list for the mount point. 1184 */ 1185 if (deltasec <= NFS_KERBCLOCKSKEW) { 1186 if (nmp->nm_numuids < nuidhash_max) { 1187 nmp->nm_numuids++; 1188 nuidp = (struct nfsuid *) 1189 malloc(sizeof (struct nfsuid), M_NFSUID, 1190 M_WAITOK); 1191 } else { 1192 nuidp = nmp->nm_uidlruhead.tqh_first; 1193 LIST_REMOVE(nuidp, nu_hash); 1194 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, 1195 nu_lru); 1196 } 1197 nuidp->nu_flag = 0; 1198 nuidp->nu_cr.cr_uid = cred->cr_uid; 1199 nuidp->nu_expire = time_second + NFS_KERBTTL; 1200 nuidp->nu_timestamp = ktvout; 1201 nuidp->nu_nickname = nick; 1202 bcopy(key, nuidp->nu_key, sizeof (key)); 1203 TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, 1204 nu_lru); 1205 LIST_INSERT_HEAD(NMUIDHASH(nmp, cred->cr_uid), 1206 nuidp, nu_hash); 1207 } 1208 } else 1209 nfsm_adv(nfsm_rndup(len)); 1210nfsmout: 1211 *mdp = md; 1212 *dposp = dpos; 1213 return (error); 1214} 1215