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: src/sys/nfs/nfs_syscalls.c,v 1.58.2.1 2000/11/26 02:30:06 dillon Exp $ 38 * $DragonFly: src/sys/vfs/nfs/nfs_syscalls.c,v 1.14 2004/03/09 02:52:10 dillon Exp $ 39 */ 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/sysproto.h> 44 #include <sys/kernel.h> 45 #include <sys/sysctl.h> 46 #include <sys/file.h> 47 #include <sys/filedesc.h> 48 #include <sys/vnode.h> 49 #include <sys/malloc.h> 50 #include <sys/mount.h> 51 #include <sys/proc.h> 52 #include <sys/buf.h> 53 #include <sys/mbuf.h> 54 #include <sys/resourcevar.h> 55 #include <sys/socket.h> 56 #include <sys/socketvar.h> 57 #include <sys/domain.h> 58 #include <sys/protosw.h> 59 #include <sys/namei.h> 60 #include <vm/vm_zone.h> 61 62 #include <netinet/in.h> 63 #include <netinet/tcp.h> 64 #include "xdr_subs.h" 65 #include "rpcv2.h" 66 #include "nfsproto.h" 67 #include "nfs.h" 68 #include "nfsm_subs.h" 69 #include "nfsrvcache.h" 70 #include "nfsmount.h" 71 #include "nfsnode.h" 72 #include "nqnfs.h" 73 #include "nfsrtt.h" 74 75 static MALLOC_DEFINE(M_NFSSVC, "NFS srvsock", "Nfs server structure"); 76 77 /* Global defs. */ 78 extern int32_t (*nfsrv3_procs[NFS_NPROCS]) (struct nfsrv_descript *nd, 79 struct nfssvc_sock *slp, 80 struct thread *td, 81 struct mbuf **mreqp); 82 extern int nfs_numasync; 83 extern time_t nqnfsstarttime; 84 extern int nqsrv_writeslack; 85 extern int nfsrtton; 86 extern struct nfsstats nfsstats; 87 extern int nfsrvw_procrastinate; 88 extern int nfsrvw_procrastinate_v3; 89 static int nuidhash_max = NFS_MAXUIDHASH; 90 91 #ifndef NFS_NOSERVER 92 static void nfsrv_zapsock (struct nfssvc_sock *slp); 93 #endif 94 static int nfssvc_iod (struct thread *); 95 96 #define TRUE 1 97 #define FALSE 0 98 99 static int nfs_asyncdaemon[NFS_MAXASYNCDAEMON]; 100 101 SYSCTL_DECL(_vfs_nfs); 102 103 #ifndef NFS_NOSERVER 104 int nfsd_waiting = 0; 105 static struct nfsdrt nfsdrt; 106 static int nfs_numnfsd = 0; 107 static int notstarted = 1; 108 static int modify_flag = 0; 109 static void nfsd_rt (int sotype, struct nfsrv_descript *nd, 110 int cacherep); 111 static int nfssvc_addsock (struct file *, struct sockaddr *, 112 struct thread *); 113 static int nfssvc_nfsd (struct nfsd_srvargs *,caddr_t,struct thread *); 114 115 static int nfs_privport = 0; 116 SYSCTL_INT(_vfs_nfs, NFS_NFSPRIVPORT, nfs_privport, CTLFLAG_RW, &nfs_privport, 0, ""); 117 SYSCTL_INT(_vfs_nfs, OID_AUTO, gatherdelay, CTLFLAG_RW, &nfsrvw_procrastinate, 0, ""); 118 SYSCTL_INT(_vfs_nfs, OID_AUTO, gatherdelay_v3, CTLFLAG_RW, &nfsrvw_procrastinate_v3, 0, ""); 119 static int nfs_soreserve = 65535; 120 SYSCTL_INT(_vfs_nfs, OID_AUTO, soreserve, CTLFLAG_RW, &nfs_soreserve, 0, ""); 121 122 /* 123 * NFS server system calls 124 */ 125 126 #endif /* NFS_NOSERVER */ 127 /* 128 * nfssvc_args(int flag, caddr_t argp) 129 * 130 * Nfs server psuedo system call for the nfsd's 131 * Based on the flag value it either: 132 * - adds a socket to the selection list 133 * - remains in the kernel as an nfsd 134 * - remains in the kernel as an nfsiod 135 */ 136 int 137 nfssvc(struct nfssvc_args *uap) 138 { 139 #ifndef NFS_NOSERVER 140 struct nameidata nd; 141 struct file *fp; 142 struct sockaddr *nam; 143 struct nfsd_args nfsdarg; 144 struct nfsd_srvargs nfsd_srvargs, *nsd = &nfsd_srvargs; 145 struct nfsd_cargs ncd; 146 struct nfsd *nfsd; 147 struct nfssvc_sock *slp; 148 struct nfsuid *nuidp; 149 struct nfsmount *nmp; 150 #endif /* NFS_NOSERVER */ 151 int error; 152 struct thread *td = curthread; 153 154 /* 155 * Must be super user 156 */ 157 error = suser(td); 158 if(error) 159 return (error); 160 KKASSERT(td->td_proc); /* for ucred and p_fd */ 161 while (nfssvc_sockhead_flag & SLP_INIT) { 162 nfssvc_sockhead_flag |= SLP_WANTINIT; 163 (void) tsleep((caddr_t)&nfssvc_sockhead, 0, "nfsd init", 0); 164 } 165 if (uap->flag & NFSSVC_BIOD) 166 error = nfssvc_iod(td); 167 #ifdef NFS_NOSERVER 168 else 169 error = ENXIO; 170 #else /* !NFS_NOSERVER */ 171 else if (uap->flag & NFSSVC_MNTD) { 172 error = copyin(uap->argp, (caddr_t)&ncd, sizeof (ncd)); 173 if (error) 174 return (error); 175 NDINIT(&nd, NAMEI_LOOKUP, CNP_FOLLOW | CNP_LOCKLEAF, 176 UIO_USERSPACE, ncd.ncd_dirp, td); 177 error = namei(&nd); 178 if (error) 179 return (error); 180 NDFREE(&nd, NDF_ONLY_PNBUF); 181 if ((nd.ni_vp->v_flag & VROOT) == 0) 182 error = EINVAL; 183 nmp = VFSTONFS(nd.ni_vp->v_mount); 184 vput(nd.ni_vp); 185 if (error) 186 return (error); 187 if ((nmp->nm_state & NFSSTA_MNTD) && 188 (uap->flag & NFSSVC_GOTAUTH) == 0) 189 return (0); 190 nmp->nm_state |= NFSSTA_MNTD; 191 error = nqnfs_clientd(nmp, td->td_proc->p_ucred, &ncd, uap->flag, 192 uap->argp, td); 193 } else if (uap->flag & NFSSVC_ADDSOCK) { 194 error = copyin(uap->argp, (caddr_t)&nfsdarg, sizeof(nfsdarg)); 195 if (error) 196 return (error); 197 error = holdsock(td->td_proc->p_fd, nfsdarg.sock, &fp); 198 if (error) 199 return (error); 200 /* 201 * Get the client address for connected sockets. 202 */ 203 if (nfsdarg.name == NULL || nfsdarg.namelen == 0) 204 nam = (struct sockaddr *)0; 205 else { 206 error = getsockaddr(&nam, nfsdarg.name, 207 nfsdarg.namelen); 208 if (error) { 209 fdrop(fp, td); 210 return (error); 211 } 212 } 213 error = nfssvc_addsock(fp, nam, td); 214 fdrop(fp, td); 215 } else { 216 error = copyin(uap->argp, (caddr_t)nsd, sizeof (*nsd)); 217 if (error) 218 return (error); 219 if ((uap->flag & NFSSVC_AUTHIN) && 220 ((nfsd = nsd->nsd_nfsd)) != NULL && 221 (nfsd->nfsd_slp->ns_flag & SLP_VALID)) { 222 slp = nfsd->nfsd_slp; 223 224 /* 225 * First check to see if another nfsd has already 226 * added this credential. 227 */ 228 for (nuidp = NUIDHASH(slp,nsd->nsd_cr.cr_uid)->lh_first; 229 nuidp != 0; nuidp = nuidp->nu_hash.le_next) { 230 if (nuidp->nu_cr.cr_uid == nsd->nsd_cr.cr_uid && 231 (!nfsd->nfsd_nd->nd_nam2 || 232 netaddr_match(NU_NETFAM(nuidp), 233 &nuidp->nu_haddr, nfsd->nfsd_nd->nd_nam2))) 234 break; 235 } 236 if (nuidp) { 237 nfsrv_setcred(&nuidp->nu_cr,&nfsd->nfsd_nd->nd_cr); 238 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL; 239 } else { 240 /* 241 * Nope, so we will. 242 */ 243 if (slp->ns_numuids < nuidhash_max) { 244 slp->ns_numuids++; 245 nuidp = (struct nfsuid *) 246 malloc(sizeof (struct nfsuid), M_NFSUID, 247 M_WAITOK); 248 } else 249 nuidp = (struct nfsuid *)0; 250 if ((slp->ns_flag & SLP_VALID) == 0) { 251 if (nuidp) 252 free((caddr_t)nuidp, M_NFSUID); 253 } else { 254 if (nuidp == (struct nfsuid *)0) { 255 nuidp = slp->ns_uidlruhead.tqh_first; 256 LIST_REMOVE(nuidp, nu_hash); 257 TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, 258 nu_lru); 259 if (nuidp->nu_flag & NU_NAM) 260 FREE(nuidp->nu_nam, M_SONAME); 261 } 262 nuidp->nu_flag = 0; 263 nuidp->nu_cr = nsd->nsd_cr; 264 if (nuidp->nu_cr.cr_ngroups > NGROUPS) 265 nuidp->nu_cr.cr_ngroups = NGROUPS; 266 nuidp->nu_cr.cr_ref = 1; 267 nuidp->nu_timestamp = nsd->nsd_timestamp; 268 nuidp->nu_expire = time_second + nsd->nsd_ttl; 269 /* 270 * and save the session key in nu_key. 271 */ 272 bcopy(nsd->nsd_key, nuidp->nu_key, 273 sizeof (nsd->nsd_key)); 274 if (nfsd->nfsd_nd->nd_nam2) { 275 struct sockaddr_in *saddr; 276 277 saddr = (struct sockaddr_in *) 278 nfsd->nfsd_nd->nd_nam2; 279 switch (saddr->sin_family) { 280 case AF_INET: 281 nuidp->nu_flag |= NU_INETADDR; 282 nuidp->nu_inetaddr = 283 saddr->sin_addr.s_addr; 284 break; 285 case AF_ISO: 286 default: 287 nuidp->nu_flag |= NU_NAM; 288 nuidp->nu_nam = 289 dup_sockaddr(nfsd->nfsd_nd-> 290 nd_nam2, 1); 291 break; 292 }; 293 } 294 TAILQ_INSERT_TAIL(&slp->ns_uidlruhead, nuidp, 295 nu_lru); 296 LIST_INSERT_HEAD(NUIDHASH(slp, nsd->nsd_uid), 297 nuidp, nu_hash); 298 nfsrv_setcred(&nuidp->nu_cr, 299 &nfsd->nfsd_nd->nd_cr); 300 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL; 301 } 302 } 303 } 304 if ((uap->flag & NFSSVC_AUTHINFAIL) && (nfsd = nsd->nsd_nfsd)) 305 nfsd->nfsd_flag |= NFSD_AUTHFAIL; 306 error = nfssvc_nfsd(nsd, uap->argp, td); 307 } 308 #endif /* NFS_NOSERVER */ 309 if (error == EINTR || error == ERESTART) 310 error = 0; 311 return (error); 312 } 313 314 #ifndef NFS_NOSERVER 315 /* 316 * Adds a socket to the list for servicing by nfsds. 317 */ 318 static int 319 nfssvc_addsock(struct file *fp, struct sockaddr *mynam, struct thread *td) 320 { 321 int siz; 322 struct nfssvc_sock *slp; 323 struct socket *so; 324 int error, s; 325 326 so = (struct socket *)fp->f_data; 327 #if 0 328 tslp = (struct nfssvc_sock *)0; 329 /* 330 * Add it to the list, as required. 331 */ 332 if (so->so_proto->pr_protocol == IPPROTO_UDP) { 333 tslp = nfs_udpsock; 334 if (tslp->ns_flag & SLP_VALID) { 335 if (mynam != NULL) 336 FREE(mynam, M_SONAME); 337 return (EPERM); 338 } 339 } 340 #endif 341 /* 342 * Reserve buffer space in the socket. Note that due to bugs in 343 * Linux's delayed-ack code, serious performance degredation may 344 * occur with linux hosts if the minimum is used. 345 */ 346 if (so->so_type == SOCK_STREAM) 347 siz = NFS_MAXPACKET + sizeof (u_long); 348 else 349 siz = NFS_MAXPACKET; 350 if (siz < nfs_soreserve) 351 siz = nfs_soreserve; 352 if (siz > sb_max_adj) { 353 printf("Warning: vfs.nfs.soreserve (%d) " 354 "limited to adjusted sb_max (%ld)\n", 355 nfs_soreserve, sb_max_adj); 356 siz = sb_max_adj; 357 } 358 359 error = soreserve(so, siz, siz, &td->td_proc->p_rlimit[RLIMIT_SBSIZE]); 360 if (error) { 361 if (mynam != NULL) 362 FREE(mynam, M_SONAME); 363 return (error); 364 } 365 366 /* 367 * Set protocol specific options { for now TCP only } and 368 * reserve some space. For datagram sockets, this can get called 369 * repeatedly for the same socket, but that isn't harmful. 370 */ 371 if (so->so_type == SOCK_STREAM) { 372 struct sockopt sopt; 373 int val; 374 375 bzero(&sopt, sizeof sopt); 376 sopt.sopt_level = SOL_SOCKET; 377 sopt.sopt_name = SO_KEEPALIVE; 378 sopt.sopt_val = &val; 379 sopt.sopt_valsize = sizeof val; 380 val = 1; 381 sosetopt(so, &sopt); 382 } 383 if (so->so_proto->pr_domain->dom_family == AF_INET && 384 so->so_proto->pr_protocol == IPPROTO_TCP) { 385 struct sockopt sopt; 386 int val; 387 388 bzero(&sopt, sizeof sopt); 389 sopt.sopt_level = IPPROTO_TCP; 390 sopt.sopt_name = TCP_NODELAY; 391 sopt.sopt_val = &val; 392 sopt.sopt_valsize = sizeof val; 393 val = 1; 394 sosetopt(so, &sopt); 395 } 396 so->so_rcv.sb_flags &= ~SB_NOINTR; 397 so->so_rcv.sb_timeo = 0; 398 so->so_snd.sb_flags &= ~SB_NOINTR; 399 so->so_snd.sb_timeo = 0; 400 401 slp = (struct nfssvc_sock *) 402 malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK); 403 bzero((caddr_t)slp, sizeof (struct nfssvc_sock)); 404 STAILQ_INIT(&slp->ns_rec); 405 TAILQ_INIT(&slp->ns_uidlruhead); 406 TAILQ_INSERT_TAIL(&nfssvc_sockhead, slp, ns_chain); 407 408 slp->ns_so = so; 409 slp->ns_nam = mynam; 410 fp->f_count++; 411 slp->ns_fp = fp; 412 s = splnet(); 413 so->so_upcallarg = (caddr_t)slp; 414 so->so_upcall = nfsrv_rcv; 415 so->so_rcv.sb_flags |= SB_UPCALL; 416 slp->ns_flag = (SLP_VALID | SLP_NEEDQ); 417 nfsrv_wakenfsd(slp); 418 splx(s); 419 return (0); 420 } 421 422 /* 423 * Called by nfssvc() for nfsds. Just loops around servicing rpc requests 424 * until it is killed by a signal. 425 */ 426 static int 427 nfssvc_nfsd(struct nfsd_srvargs *nsd, caddr_t argp, struct thread *td) 428 { 429 int siz; 430 struct nfssvc_sock *slp; 431 struct nfsd *nfsd = nsd->nsd_nfsd; 432 struct nfsrv_descript *nd = NULL; 433 struct mbuf *m, *mreq; 434 int error = 0, cacherep, s, sotype, writes_todo; 435 int procrastinate; 436 u_quad_t cur_usec; 437 438 #ifndef nolint 439 cacherep = RC_DOIT; 440 writes_todo = 0; 441 #endif 442 if (nfsd == (struct nfsd *)0) { 443 nsd->nsd_nfsd = nfsd = (struct nfsd *) 444 malloc(sizeof (struct nfsd), M_NFSD, M_WAITOK); 445 bzero((caddr_t)nfsd, sizeof (struct nfsd)); 446 s = splnet(); 447 nfsd->nfsd_td = td; 448 TAILQ_INSERT_TAIL(&nfsd_head, nfsd, nfsd_chain); 449 nfs_numnfsd++; 450 } else 451 s = splnet(); 452 453 /* 454 * Loop getting rpc requests until SIGKILL. 455 */ 456 for (;;) { 457 if ((nfsd->nfsd_flag & NFSD_REQINPROG) == 0) { 458 while (nfsd->nfsd_slp == (struct nfssvc_sock *)0 && 459 (nfsd_head_flag & NFSD_CHECKSLP) == 0) { 460 nfsd->nfsd_flag |= NFSD_WAITING; 461 nfsd_waiting++; 462 error = tsleep((caddr_t)nfsd, PCATCH, "nfsd", 0); 463 nfsd_waiting--; 464 if (error) 465 goto done; 466 } 467 if (nfsd->nfsd_slp == (struct nfssvc_sock *)0 && 468 (nfsd_head_flag & NFSD_CHECKSLP) != 0) { 469 for (slp = nfssvc_sockhead.tqh_first; slp != 0; 470 slp = slp->ns_chain.tqe_next) { 471 if ((slp->ns_flag & (SLP_VALID | SLP_DOREC)) 472 == (SLP_VALID | SLP_DOREC)) { 473 slp->ns_flag &= ~SLP_DOREC; 474 slp->ns_sref++; 475 nfsd->nfsd_slp = slp; 476 break; 477 } 478 } 479 if (slp == 0) 480 nfsd_head_flag &= ~NFSD_CHECKSLP; 481 } 482 if ((slp = nfsd->nfsd_slp) == (struct nfssvc_sock *)0) 483 continue; 484 if (slp->ns_flag & SLP_VALID) { 485 if (slp->ns_flag & SLP_DISCONN) 486 nfsrv_zapsock(slp); 487 else if (slp->ns_flag & SLP_NEEDQ) { 488 slp->ns_flag &= ~SLP_NEEDQ; 489 (void) nfs_slplock(slp, 1); 490 nfsrv_rcv(slp->ns_so, (caddr_t)slp, 491 M_WAIT); 492 nfs_slpunlock(slp); 493 } 494 error = nfsrv_dorec(slp, nfsd, &nd); 495 cur_usec = nfs_curusec(); 496 if (error && slp->ns_tq.lh_first && 497 slp->ns_tq.lh_first->nd_time <= cur_usec) { 498 error = 0; 499 cacherep = RC_DOIT; 500 writes_todo = 1; 501 } else 502 writes_todo = 0; 503 nfsd->nfsd_flag |= NFSD_REQINPROG; 504 } 505 } else { 506 error = 0; 507 slp = nfsd->nfsd_slp; 508 } 509 if (error || (slp->ns_flag & SLP_VALID) == 0) { 510 if (nd) { 511 free((caddr_t)nd, M_NFSRVDESC); 512 nd = NULL; 513 } 514 nfsd->nfsd_slp = (struct nfssvc_sock *)0; 515 nfsd->nfsd_flag &= ~NFSD_REQINPROG; 516 nfsrv_slpderef(slp); 517 continue; 518 } 519 splx(s); 520 sotype = slp->ns_so->so_type; 521 if (nd) { 522 getmicrotime(&nd->nd_starttime); 523 if (nd->nd_nam2) 524 nd->nd_nam = nd->nd_nam2; 525 else 526 nd->nd_nam = slp->ns_nam; 527 528 /* 529 * Check to see if authorization is needed. 530 */ 531 if (nfsd->nfsd_flag & NFSD_NEEDAUTH) { 532 nfsd->nfsd_flag &= ~NFSD_NEEDAUTH; 533 nsd->nsd_haddr = 534 ((struct sockaddr_in *) 535 nd->nd_nam)->sin_addr.s_addr; 536 nsd->nsd_authlen = nfsd->nfsd_authlen; 537 nsd->nsd_verflen = nfsd->nfsd_verflen; 538 if (!copyout(nfsd->nfsd_authstr,nsd->nsd_authstr, 539 nfsd->nfsd_authlen) && 540 !copyout(nfsd->nfsd_verfstr, nsd->nsd_verfstr, 541 nfsd->nfsd_verflen) && 542 !copyout((caddr_t)nsd, argp, sizeof (*nsd))) 543 return (ENEEDAUTH); 544 cacherep = RC_DROPIT; 545 } else 546 cacherep = nfsrv_getcache(nd, slp, &mreq); 547 548 /* 549 * Check for just starting up for NQNFS and send 550 * fake "try again later" replies to the NQNFS clients. 551 */ 552 if (notstarted && nqnfsstarttime <= time_second) { 553 if (modify_flag) { 554 nqnfsstarttime = time_second + nqsrv_writeslack; 555 modify_flag = 0; 556 } else 557 notstarted = 0; 558 } 559 if (notstarted) { 560 if ((nd->nd_flag & ND_NQNFS) == 0) 561 cacherep = RC_DROPIT; 562 else if (nd->nd_procnum != NFSPROC_WRITE) { 563 nd->nd_procnum = NFSPROC_NOOP; 564 nd->nd_repstat = NQNFS_TRYLATER; 565 cacherep = RC_DOIT; 566 } else 567 modify_flag = 1; 568 } else if (nfsd->nfsd_flag & NFSD_AUTHFAIL) { 569 nfsd->nfsd_flag &= ~NFSD_AUTHFAIL; 570 nd->nd_procnum = NFSPROC_NOOP; 571 nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK); 572 cacherep = RC_DOIT; 573 } else if (nfs_privport) { 574 /* Check if source port is privileged */ 575 u_short port; 576 struct sockaddr *nam = nd->nd_nam; 577 struct sockaddr_in *sin; 578 579 sin = (struct sockaddr_in *)nam; 580 port = ntohs(sin->sin_port); 581 if (port >= IPPORT_RESERVED && 582 nd->nd_procnum != NFSPROC_NULL) { 583 nd->nd_procnum = NFSPROC_NOOP; 584 nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK); 585 cacherep = RC_DOIT; 586 printf("NFS request from unprivileged port (%s:%d)\n", 587 inet_ntoa(sin->sin_addr), port); 588 } 589 } 590 591 } 592 593 /* 594 * Loop to get all the write rpc relies that have been 595 * gathered together. 596 */ 597 do { 598 switch (cacherep) { 599 case RC_DOIT: 600 if (nd && (nd->nd_flag & ND_NFSV3)) 601 procrastinate = nfsrvw_procrastinate_v3; 602 else 603 procrastinate = nfsrvw_procrastinate; 604 if (writes_todo || (nd->nd_procnum == NFSPROC_WRITE && 605 procrastinate > 0 && !notstarted)) 606 error = nfsrv_writegather(&nd, slp, 607 nfsd->nfsd_td, &mreq); 608 else 609 error = (*(nfsrv3_procs[nd->nd_procnum]))(nd, 610 slp, nfsd->nfsd_td, &mreq); 611 if (mreq == NULL) 612 break; 613 if (error != 0 && error != NFSERR_RETVOID) { 614 if (nd->nd_procnum != NQNFSPROC_VACATED) 615 nfsstats.srv_errs++; 616 nfsrv_updatecache(nd, FALSE, mreq); 617 if (nd->nd_nam2) 618 FREE(nd->nd_nam2, M_SONAME); 619 break; 620 } 621 nfsstats.srvrpccnt[nd->nd_procnum]++; 622 nfsrv_updatecache(nd, TRUE, mreq); 623 nd->nd_mrep = (struct mbuf *)0; 624 case RC_REPLY: 625 m = mreq; 626 siz = 0; 627 while (m) { 628 siz += m->m_len; 629 m = m->m_next; 630 } 631 if (siz <= 0 || siz > NFS_MAXPACKET) { 632 printf("mbuf siz=%d\n",siz); 633 panic("Bad nfs svc reply"); 634 } 635 m = mreq; 636 m->m_pkthdr.len = siz; 637 m->m_pkthdr.rcvif = (struct ifnet *)0; 638 /* 639 * For stream protocols, prepend a Sun RPC 640 * Record Mark. 641 */ 642 if (sotype == SOCK_STREAM) { 643 M_PREPEND(m, NFSX_UNSIGNED, M_WAIT); 644 if (m == NULL) 645 return (ENOBUFS); 646 *mtod(m, u_int32_t *) = htonl(0x80000000 | siz); 647 } 648 if (slp->ns_so->so_proto->pr_flags & PR_CONNREQUIRED) 649 (void) nfs_slplock(slp, 1); 650 if (slp->ns_flag & SLP_VALID) 651 error = nfs_send(slp->ns_so, nd->nd_nam2, m, NULL); 652 else { 653 error = EPIPE; 654 m_freem(m); 655 } 656 if (nfsrtton) 657 nfsd_rt(sotype, nd, cacherep); 658 if (nd->nd_nam2) 659 FREE(nd->nd_nam2, M_SONAME); 660 if (nd->nd_mrep) 661 m_freem(nd->nd_mrep); 662 if (error == EPIPE) 663 nfsrv_zapsock(slp); 664 if (slp->ns_so->so_proto->pr_flags & PR_CONNREQUIRED) 665 nfs_slpunlock(slp); 666 if (error == EINTR || error == ERESTART) { 667 free((caddr_t)nd, M_NFSRVDESC); 668 nfsrv_slpderef(slp); 669 s = splnet(); 670 goto done; 671 } 672 break; 673 case RC_DROPIT: 674 if (nfsrtton) 675 nfsd_rt(sotype, nd, cacherep); 676 m_freem(nd->nd_mrep); 677 if (nd->nd_nam2) 678 FREE(nd->nd_nam2, M_SONAME); 679 break; 680 }; 681 if (nd) { 682 FREE((caddr_t)nd, M_NFSRVDESC); 683 nd = NULL; 684 } 685 686 /* 687 * Check to see if there are outstanding writes that 688 * need to be serviced. 689 */ 690 cur_usec = nfs_curusec(); 691 s = splsoftclock(); 692 if (slp->ns_tq.lh_first && 693 slp->ns_tq.lh_first->nd_time <= cur_usec) { 694 cacherep = RC_DOIT; 695 writes_todo = 1; 696 } else 697 writes_todo = 0; 698 splx(s); 699 } while (writes_todo); 700 s = splnet(); 701 if (nfsrv_dorec(slp, nfsd, &nd)) { 702 nfsd->nfsd_flag &= ~NFSD_REQINPROG; 703 nfsd->nfsd_slp = NULL; 704 nfsrv_slpderef(slp); 705 } 706 } 707 done: 708 TAILQ_REMOVE(&nfsd_head, nfsd, nfsd_chain); 709 splx(s); 710 free((caddr_t)nfsd, M_NFSD); 711 nsd->nsd_nfsd = (struct nfsd *)0; 712 if (--nfs_numnfsd == 0) 713 nfsrv_init(TRUE); /* Reinitialize everything */ 714 return (error); 715 } 716 717 /* 718 * Shut down a socket associated with an nfssvc_sock structure. 719 * Should be called with the send lock set, if required. 720 * The trick here is to increment the sref at the start, so that the nfsds 721 * will stop using it and clear ns_flag at the end so that it will not be 722 * reassigned during cleanup. 723 */ 724 static void 725 nfsrv_zapsock(slp) 726 struct nfssvc_sock *slp; 727 { 728 struct nfsuid *nuidp, *nnuidp; 729 struct nfsrv_descript *nwp, *nnwp; 730 struct socket *so; 731 struct file *fp; 732 struct nfsrv_rec *rec; 733 int s; 734 735 slp->ns_flag &= ~SLP_ALLFLAGS; 736 fp = slp->ns_fp; 737 if (fp) { 738 slp->ns_fp = (struct file *)0; 739 so = slp->ns_so; 740 so->so_rcv.sb_flags &= ~SB_UPCALL; 741 so->so_upcall = NULL; 742 so->so_upcallarg = NULL; 743 soshutdown(so, 2); 744 closef(fp, NULL); 745 if (slp->ns_nam) 746 FREE(slp->ns_nam, M_SONAME); 747 m_freem(slp->ns_raw); 748 while ((rec = STAILQ_FIRST(&slp->ns_rec)) != NULL) { 749 STAILQ_REMOVE_HEAD(&slp->ns_rec, nr_link); 750 if (rec->nr_address) 751 FREE(rec->nr_address, M_SONAME); 752 m_freem(rec->nr_packet); 753 free(rec, M_NFSRVDESC); 754 } 755 for (nuidp = slp->ns_uidlruhead.tqh_first; nuidp != 0; 756 nuidp = nnuidp) { 757 nnuidp = nuidp->nu_lru.tqe_next; 758 LIST_REMOVE(nuidp, nu_hash); 759 TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, nu_lru); 760 if (nuidp->nu_flag & NU_NAM) 761 FREE(nuidp->nu_nam, M_SONAME); 762 free((caddr_t)nuidp, M_NFSUID); 763 } 764 s = splsoftclock(); 765 for (nwp = slp->ns_tq.lh_first; nwp; nwp = nnwp) { 766 nnwp = nwp->nd_tq.le_next; 767 LIST_REMOVE(nwp, nd_tq); 768 free((caddr_t)nwp, M_NFSRVDESC); 769 } 770 LIST_INIT(&slp->ns_tq); 771 splx(s); 772 } 773 } 774 775 /* 776 * Derefence a server socket structure. If it has no more references and 777 * is no longer valid, you can throw it away. 778 */ 779 void 780 nfsrv_slpderef(slp) 781 struct nfssvc_sock *slp; 782 { 783 if (--(slp->ns_sref) == 0 && (slp->ns_flag & SLP_VALID) == 0) { 784 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain); 785 free((caddr_t)slp, M_NFSSVC); 786 } 787 } 788 789 /* 790 * Lock a socket against others. 791 */ 792 int 793 nfs_slplock(slp, wait) 794 struct nfssvc_sock *slp; 795 int wait; 796 { 797 int *statep = &slp->ns_solock; 798 799 if (!wait && (*statep & NFSSTA_SNDLOCK)) 800 return(0); /* already locked, fail */ 801 while (*statep & NFSSTA_SNDLOCK) { 802 *statep |= NFSSTA_WANTSND; 803 (void) tsleep((caddr_t)statep, 0, "nfsslplck", 0); 804 } 805 *statep |= NFSSTA_SNDLOCK; 806 return (1); 807 } 808 809 /* 810 * Unlock the stream socket for others. 811 */ 812 void 813 nfs_slpunlock(slp) 814 struct nfssvc_sock *slp; 815 { 816 int *statep = &slp->ns_solock; 817 818 if ((*statep & NFSSTA_SNDLOCK) == 0) 819 panic("nfs slpunlock"); 820 *statep &= ~NFSSTA_SNDLOCK; 821 if (*statep & NFSSTA_WANTSND) { 822 *statep &= ~NFSSTA_WANTSND; 823 wakeup((caddr_t)statep); 824 } 825 } 826 827 /* 828 * Initialize the data structures for the server. 829 * Handshake with any new nfsds starting up to avoid any chance of 830 * corruption. 831 */ 832 void 833 nfsrv_init(terminating) 834 int terminating; 835 { 836 struct nfssvc_sock *slp, *nslp; 837 838 if (nfssvc_sockhead_flag & SLP_INIT) 839 panic("nfsd init"); 840 nfssvc_sockhead_flag |= SLP_INIT; 841 if (terminating) { 842 for (slp = nfssvc_sockhead.tqh_first; slp != 0; slp = nslp) { 843 nslp = slp->ns_chain.tqe_next; 844 if (slp->ns_flag & SLP_VALID) 845 nfsrv_zapsock(slp); 846 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain); 847 free((caddr_t)slp, M_NFSSVC); 848 } 849 nfsrv_cleancache(); /* And clear out server cache */ 850 } else 851 nfs_pub.np_valid = 0; 852 853 TAILQ_INIT(&nfssvc_sockhead); 854 nfssvc_sockhead_flag &= ~SLP_INIT; 855 if (nfssvc_sockhead_flag & SLP_WANTINIT) { 856 nfssvc_sockhead_flag &= ~SLP_WANTINIT; 857 wakeup((caddr_t)&nfssvc_sockhead); 858 } 859 860 TAILQ_INIT(&nfsd_head); 861 nfsd_head_flag &= ~NFSD_CHECKSLP; 862 863 #if 0 864 nfs_udpsock = (struct nfssvc_sock *) 865 malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK); 866 bzero((caddr_t)nfs_udpsock, sizeof (struct nfssvc_sock)); 867 STAILQ_INIT(&nfs_udpsock->ns_rec); 868 TAILQ_INIT(&nfs_udpsock->ns_uidlruhead); 869 TAILQ_INSERT_HEAD(&nfssvc_sockhead, nfs_udpsock, ns_chain); 870 871 nfs_cltpsock = (struct nfssvc_sock *) 872 malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK); 873 bzero((caddr_t)nfs_cltpsock, sizeof (struct nfssvc_sock)); 874 STAILQ_INIT(&nfs_cltpsock->ns_rec); 875 TAILQ_INIT(&nfs_cltpsock->ns_uidlruhead); 876 TAILQ_INSERT_TAIL(&nfssvc_sockhead, nfs_cltpsock, ns_chain); 877 #endif 878 } 879 880 /* 881 * Add entries to the server monitor log. 882 */ 883 static void 884 nfsd_rt(sotype, nd, cacherep) 885 int sotype; 886 struct nfsrv_descript *nd; 887 int cacherep; 888 { 889 struct drt *rt; 890 891 rt = &nfsdrt.drt[nfsdrt.pos]; 892 if (cacherep == RC_DOIT) 893 rt->flag = 0; 894 else if (cacherep == RC_REPLY) 895 rt->flag = DRT_CACHEREPLY; 896 else 897 rt->flag = DRT_CACHEDROP; 898 if (sotype == SOCK_STREAM) 899 rt->flag |= DRT_TCP; 900 if (nd->nd_flag & ND_NQNFS) 901 rt->flag |= DRT_NQNFS; 902 else if (nd->nd_flag & ND_NFSV3) 903 rt->flag |= DRT_NFSV3; 904 rt->proc = nd->nd_procnum; 905 if (nd->nd_nam->sa_family == AF_INET) 906 rt->ipadr = ((struct sockaddr_in *)nd->nd_nam)->sin_addr.s_addr; 907 else 908 rt->ipadr = INADDR_ANY; 909 rt->resptime = nfs_curusec() - (nd->nd_starttime.tv_sec * 1000000 + nd->nd_starttime.tv_usec); 910 getmicrotime(&rt->tstamp); 911 nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ; 912 } 913 #endif /* NFS_NOSERVER */ 914 915 static int nfs_defect = 0; 916 SYSCTL_INT(_vfs_nfs, OID_AUTO, defect, CTLFLAG_RW, &nfs_defect, 0, ""); 917 918 /* 919 * Asynchronous I/O daemons for client nfs. 920 * They do read-ahead and write-behind operations on the block I/O cache. 921 * Never returns unless it fails or gets killed. 922 */ 923 static int 924 nfssvc_iod(struct thread *td) 925 { 926 struct buf *bp; 927 int i, myiod; 928 struct nfsmount *nmp; 929 int error = 0; 930 931 /* 932 * Assign my position or return error if too many already running 933 */ 934 myiod = -1; 935 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) 936 if (nfs_asyncdaemon[i] == 0) { 937 nfs_asyncdaemon[i]++; 938 myiod = i; 939 break; 940 } 941 if (myiod == -1) 942 return (EBUSY); 943 nfs_numasync++; 944 /* 945 * Just loop around doin our stuff until SIGKILL 946 */ 947 for (;;) { 948 while (((nmp = nfs_iodmount[myiod]) == NULL 949 || nmp->nm_bufq.tqh_first == NULL) 950 && error == 0) { 951 if (nmp) 952 nmp->nm_bufqiods--; 953 nfs_iodwant[myiod] = td; 954 nfs_iodmount[myiod] = NULL; 955 error = tsleep((caddr_t)&nfs_iodwant[myiod], 956 PCATCH, "nfsidl", 0); 957 } 958 if (error) { 959 nfs_asyncdaemon[myiod] = 0; 960 if (nmp) 961 nmp->nm_bufqiods--; 962 nfs_iodwant[myiod] = NULL; 963 nfs_iodmount[myiod] = NULL; 964 nfs_numasync--; 965 return (error); 966 } 967 while ((bp = nmp->nm_bufq.tqh_first) != NULL) { 968 /* Take one off the front of the list */ 969 TAILQ_REMOVE(&nmp->nm_bufq, bp, b_freelist); 970 nmp->nm_bufqlen--; 971 if (nmp->nm_bufqwant && nmp->nm_bufqlen <= nfs_numasync) { 972 nmp->nm_bufqwant = FALSE; 973 wakeup(&nmp->nm_bufq); 974 } 975 (void) nfs_doio(bp, NULL); 976 /* 977 * If there are more than one iod on this mount, then defect 978 * so that the iods can be shared out fairly between the mounts 979 */ 980 if (nfs_defect && nmp->nm_bufqiods > 1) { 981 NFS_DPF(ASYNCIO, 982 ("nfssvc_iod: iod %d defecting from mount %p\n", 983 myiod, nmp)); 984 nfs_iodmount[myiod] = NULL; 985 nmp->nm_bufqiods--; 986 break; 987 } 988 } 989 } 990 } 991 992 993 /* 994 * Get an authorization string for the uid by having the mount_nfs sitting 995 * on this mount point porpous out of the kernel and do it. 996 */ 997 int 998 nfs_getauth(nmp, rep, cred, auth_str, auth_len, verf_str, verf_len, key) 999 struct nfsmount *nmp; 1000 struct nfsreq *rep; 1001 struct ucred *cred; 1002 char **auth_str; 1003 int *auth_len; 1004 char *verf_str; 1005 int *verf_len; 1006 NFSKERBKEY_T key; /* return session key */ 1007 { 1008 int error = 0; 1009 1010 while ((nmp->nm_state & NFSSTA_WAITAUTH) == 0) { 1011 nmp->nm_state |= NFSSTA_WANTAUTH; 1012 (void) tsleep((caddr_t)&nmp->nm_authtype, 0, 1013 "nfsauth1", 2 * hz); 1014 error = nfs_sigintr(nmp, rep, rep->r_td); 1015 if (error) { 1016 nmp->nm_state &= ~NFSSTA_WANTAUTH; 1017 return (error); 1018 } 1019 } 1020 nmp->nm_state &= ~(NFSSTA_WAITAUTH | NFSSTA_WANTAUTH); 1021 nmp->nm_authstr = *auth_str = (char *)malloc(RPCAUTH_MAXSIZ, M_TEMP, M_WAITOK); 1022 nmp->nm_authlen = RPCAUTH_MAXSIZ; 1023 nmp->nm_verfstr = verf_str; 1024 nmp->nm_verflen = *verf_len; 1025 nmp->nm_authuid = cred->cr_uid; 1026 wakeup((caddr_t)&nmp->nm_authstr); 1027 1028 /* 1029 * And wait for mount_nfs to do its stuff. 1030 */ 1031 while ((nmp->nm_state & NFSSTA_HASAUTH) == 0 && error == 0) { 1032 (void) tsleep((caddr_t)&nmp->nm_authlen, 0, 1033 "nfsauth2", 2 * hz); 1034 error = nfs_sigintr(nmp, rep, rep->r_td); 1035 } 1036 if (nmp->nm_state & NFSSTA_AUTHERR) { 1037 nmp->nm_state &= ~NFSSTA_AUTHERR; 1038 error = EAUTH; 1039 } 1040 if (error) 1041 free((caddr_t)*auth_str, M_TEMP); 1042 else { 1043 *auth_len = nmp->nm_authlen; 1044 *verf_len = nmp->nm_verflen; 1045 bcopy((caddr_t)nmp->nm_key, (caddr_t)key, sizeof (key)); 1046 } 1047 nmp->nm_state &= ~NFSSTA_HASAUTH; 1048 nmp->nm_state |= NFSSTA_WAITAUTH; 1049 if (nmp->nm_state & NFSSTA_WANTAUTH) { 1050 nmp->nm_state &= ~NFSSTA_WANTAUTH; 1051 wakeup((caddr_t)&nmp->nm_authtype); 1052 } 1053 return (error); 1054 } 1055 1056 /* 1057 * Get a nickname authenticator and verifier. 1058 */ 1059 int 1060 nfs_getnickauth(nmp, cred, auth_str, auth_len, verf_str, verf_len) 1061 struct nfsmount *nmp; 1062 struct ucred *cred; 1063 char **auth_str; 1064 int *auth_len; 1065 char *verf_str; 1066 int verf_len; 1067 { 1068 struct nfsuid *nuidp; 1069 u_int32_t *nickp, *verfp; 1070 struct timeval ktvin, ktvout; 1071 1072 #ifdef DIAGNOSTIC 1073 if (verf_len < (4 * NFSX_UNSIGNED)) 1074 panic("nfs_getnickauth verf too small"); 1075 #endif 1076 for (nuidp = NMUIDHASH(nmp, cred->cr_uid)->lh_first; 1077 nuidp != 0; nuidp = nuidp->nu_hash.le_next) { 1078 if (nuidp->nu_cr.cr_uid == cred->cr_uid) 1079 break; 1080 } 1081 if (!nuidp || nuidp->nu_expire < time_second) 1082 return (EACCES); 1083 1084 /* 1085 * Move to the end of the lru list (end of lru == most recently used). 1086 */ 1087 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru); 1088 TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, nu_lru); 1089 1090 nickp = (u_int32_t *)malloc(2 * NFSX_UNSIGNED, M_TEMP, M_WAITOK); 1091 *nickp++ = txdr_unsigned(RPCAKN_NICKNAME); 1092 *nickp = txdr_unsigned(nuidp->nu_nickname); 1093 *auth_str = (char *)nickp; 1094 *auth_len = 2 * NFSX_UNSIGNED; 1095 1096 /* 1097 * Now we must encrypt the verifier and package it up. 1098 */ 1099 verfp = (u_int32_t *)verf_str; 1100 *verfp++ = txdr_unsigned(RPCAKN_NICKNAME); 1101 if (time_second > nuidp->nu_timestamp.tv_sec || 1102 (time_second == nuidp->nu_timestamp.tv_sec && 1103 time_second > nuidp->nu_timestamp.tv_usec)) 1104 getmicrotime(&nuidp->nu_timestamp); 1105 else 1106 nuidp->nu_timestamp.tv_usec++; 1107 ktvin.tv_sec = txdr_unsigned(nuidp->nu_timestamp.tv_sec); 1108 ktvin.tv_usec = txdr_unsigned(nuidp->nu_timestamp.tv_usec); 1109 1110 /* 1111 * Now encrypt the timestamp verifier in ecb mode using the session 1112 * key. 1113 */ 1114 #ifdef NFSKERB 1115 XXX 1116 #endif 1117 1118 *verfp++ = ktvout.tv_sec; 1119 *verfp++ = ktvout.tv_usec; 1120 *verfp = 0; 1121 return (0); 1122 } 1123 1124 /* 1125 * Save the current nickname in a hash list entry on the mount point. 1126 */ 1127 int 1128 nfs_savenickauth(nmp, cred, len, key, mdp, dposp, mrep) 1129 struct nfsmount *nmp; 1130 struct ucred *cred; 1131 int len; 1132 NFSKERBKEY_T key; 1133 struct mbuf **mdp; 1134 char **dposp; 1135 struct mbuf *mrep; 1136 { 1137 struct nfsuid *nuidp; 1138 u_int32_t *tl; 1139 int32_t t1; 1140 struct mbuf *md = *mdp; 1141 struct timeval ktvin, ktvout; 1142 u_int32_t nick; 1143 char *dpos = *dposp, *cp2; 1144 int deltasec, error = 0; 1145 1146 if (len == (3 * NFSX_UNSIGNED)) { 1147 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 1148 ktvin.tv_sec = *tl++; 1149 ktvin.tv_usec = *tl++; 1150 nick = fxdr_unsigned(u_int32_t, *tl); 1151 1152 /* 1153 * Decrypt the timestamp in ecb mode. 1154 */ 1155 #ifdef NFSKERB 1156 XXX 1157 #endif 1158 ktvout.tv_sec = fxdr_unsigned(long, ktvout.tv_sec); 1159 ktvout.tv_usec = fxdr_unsigned(long, ktvout.tv_usec); 1160 deltasec = time_second - ktvout.tv_sec; 1161 if (deltasec < 0) 1162 deltasec = -deltasec; 1163 /* 1164 * If ok, add it to the hash list for the mount point. 1165 */ 1166 if (deltasec <= NFS_KERBCLOCKSKEW) { 1167 if (nmp->nm_numuids < nuidhash_max) { 1168 nmp->nm_numuids++; 1169 nuidp = (struct nfsuid *) 1170 malloc(sizeof (struct nfsuid), M_NFSUID, 1171 M_WAITOK); 1172 } else { 1173 nuidp = nmp->nm_uidlruhead.tqh_first; 1174 LIST_REMOVE(nuidp, nu_hash); 1175 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, 1176 nu_lru); 1177 } 1178 nuidp->nu_flag = 0; 1179 nuidp->nu_cr.cr_uid = cred->cr_uid; 1180 nuidp->nu_expire = time_second + NFS_KERBTTL; 1181 nuidp->nu_timestamp = ktvout; 1182 nuidp->nu_nickname = nick; 1183 bcopy(key, nuidp->nu_key, sizeof (key)); 1184 TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, 1185 nu_lru); 1186 LIST_INSERT_HEAD(NMUIDHASH(nmp, cred->cr_uid), 1187 nuidp, nu_hash); 1188 } 1189 } else 1190 nfsm_adv(nfsm_rndup(len)); 1191 nfsmout: 1192 *mdp = md; 1193 *dposp = dpos; 1194 return (error); 1195 } 1196