sys/vfs/nfs/nfs_syscalls.c

   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 1.31 2008/01/05 14:02:41 swildner 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/priv.h>
  53 #include <sys/buf.h>
  54 #include <sys/mbuf.h>
  55 #include <sys/resourcevar.h>
  56 #include <sys/socket.h>
  57 #include <sys/socketvar.h>
  58 #include <sys/domain.h>
  59 #include <sys/protosw.h>
  60 #include <sys/nlookup.h>
  61 #include <vm/vm_zone.h>
  62
  63 #include <netinet/in.h>
  64 #include <netinet/tcp.h>
  65 #include "xdr_subs.h"
  66 #include "rpcv2.h"
  67 #include "nfsproto.h"
  68 #include "nfs.h"
  69 #include "nfsm_subs.h"
  70 #include "nfsrvcache.h"
  71 #include "nfsmount.h"
  72 #include "nfsnode.h"
  73 #include "nfsrtt.h"
  74
  75 #include <sys/thread2.h>
  76
  77 static MALLOC_DEFINE(M_NFSSVC, "NFS srvsock", "Nfs server structure");
  78
  79 /* Global defs. */
  80 extern int32_t (*nfsrv3_procs[NFS_NPROCS]) (struct nfsrv_descript *nd,
  81                                             struct nfssvc_sock *slp,
  82                                             struct thread *td,
  83                                             struct mbuf **mreqp);
  84 extern int nfs_numasync;
  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 void     nfsd_rt (int sotype, struct nfsrv_descript *nd,
 108                              int cacherep);
 109 static int      nfssvc_addsock (struct file *, struct sockaddr *,
 110                                     struct thread *);
 111 static int      nfssvc_nfsd (struct nfsd_srvargs *,caddr_t,struct thread *);
 112
 113 static int nfs_privport = 0;
 114 SYSCTL_INT(_vfs_nfs, NFS_NFSPRIVPORT, nfs_privport, CTLFLAG_RW, &nfs_privport, 0, "");
 115 SYSCTL_INT(_vfs_nfs, OID_AUTO, gatherdelay, CTLFLAG_RW, &nfsrvw_procrastinate, 0, "");
 116 SYSCTL_INT(_vfs_nfs, OID_AUTO, gatherdelay_v3, CTLFLAG_RW, &nfsrvw_procrastinate_v3, 0, "");
 117 static int      nfs_soreserve = 65535;
 118 SYSCTL_INT(_vfs_nfs, OID_AUTO, soreserve, CTLFLAG_RW, &nfs_soreserve, 0, "");
 119
 120 /*
 121  * NFS server system calls
 122  */
 123
 124 #endif /* NFS_NOSERVER */
 125 /*
 126  * nfssvc_args(int flag, caddr_t argp)
 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 int
 135 sys_nfssvc(struct nfssvc_args *uap)
 136 {
 137 #ifndef NFS_NOSERVER
 138         struct nlookupdata nd;
 139         struct file *fp;
 140         struct sockaddr *nam;
 141         struct nfsd_args nfsdarg;
 142         struct nfsd_srvargs nfsd_srvargs, *nsd = &nfsd_srvargs;
 143         struct nfsd_cargs ncd;
 144         struct nfsd *nfsd;
 145         struct nfssvc_sock *slp;
 146         struct nfsuid *nuidp;
 147         struct nfsmount *nmp;
 148         struct vnode *vp;
 149 #endif /* NFS_NOSERVER */
 150         int error;
 151         struct thread *td = curthread;
 152
 153         /*
 154          * Must be super user
 155          */
 156         error = priv_check(td, PRIV_ROOT);
 157         if(error)
 158                 return (error);
 159         KKASSERT(td->td_proc);  /* for ucred and p_fd */
 160         while (nfssvc_sockhead_flag & SLP_INIT) {
 161                  nfssvc_sockhead_flag |= SLP_WANTINIT;
 162                 (void) tsleep((caddr_t)&nfssvc_sockhead, 0, "nfsd init", 0);
 163         }
 164         if (uap->flag & NFSSVC_BIOD)
 165                 error = nfssvc_iod(td);
 166 #ifdef NFS_NOSERVER
 167         else
 168                 error = ENXIO;
 169 #else /* !NFS_NOSERVER */
 170         else if (uap->flag & NFSSVC_MNTD) {
 171                 error = copyin(uap->argp, (caddr_t)&ncd, sizeof (ncd));
 172                 if (error)
 173                         return (error);
 174                 vp = NULL;
 175                 error = nlookup_init(&nd, ncd.ncd_dirp, UIO_USERSPACE,
 176                                         NLC_FOLLOW);
 177                 if (error == 0)
 178                         error = nlookup(&nd);
 179                 if (error == 0)
 180                         error = cache_vget(&nd.nl_nch, nd.nl_cred, LK_EXCLUSIVE, &vp);
 181                 nlookup_done(&nd);
 182                 if (error)
 183                         return (error);
 184
 185                 if ((vp->v_flag & VROOT) == 0)
 186                         error = EINVAL;
 187                 nmp = VFSTONFS(vp->v_mount);
 188                 vput(vp);
 189                 if (error)
 190                         return (error);
 191                 if ((nmp->nm_state & NFSSTA_MNTD) &&
 192                         (uap->flag & NFSSVC_GOTAUTH) == 0)
 193                         return (0);
 194                 nmp->nm_state |= NFSSTA_MNTD;
 195                 error = nfs_clientd(nmp, td->td_proc->p_ucred, &ncd, uap->flag,
 196                                     uap->argp, td);
 197         } else if (uap->flag & NFSSVC_ADDSOCK) {
 198                 error = copyin(uap->argp, (caddr_t)&nfsdarg, sizeof(nfsdarg));
 199                 if (error)
 200                         return (error);
 201                 error = holdsock(td->td_proc->p_fd, nfsdarg.sock, &fp);
 202                 if (error)
 203                         return (error);
 204                 /*
 205                  * Get the client address for connected sockets.
 206                  */
 207                 if (nfsdarg.name == NULL || nfsdarg.namelen == 0)
 208                         nam = NULL;
 209                 else {
 210                         error = getsockaddr(&nam, nfsdarg.name,
 211                                             nfsdarg.namelen);
 212                         if (error) {
 213                                 fdrop(fp);
 214                                 return (error);
 215                         }
 216                 }
 217                 error = nfssvc_addsock(fp, nam, td);
 218                 fdrop(fp);
 219         } else {
 220                 error = copyin(uap->argp, (caddr_t)nsd, sizeof (*nsd));
 221                 if (error)
 222                         return (error);
 223                 if ((uap->flag & NFSSVC_AUTHIN) &&
 224                     ((nfsd = nsd->nsd_nfsd)) != NULL &&
 225                     (nfsd->nfsd_slp->ns_flag & SLP_VALID)) {
 226                         slp = nfsd->nfsd_slp;
 227
 228                         /*
 229                          * First check to see if another nfsd has already
 230                          * added this credential.
 231                          */
 232                         for (nuidp = NUIDHASH(slp,nsd->nsd_cr.cr_uid)->lh_first;
 233                             nuidp != 0; nuidp = nuidp->nu_hash.le_next) {
 234                                 if (nuidp->nu_cr.cr_uid == nsd->nsd_cr.cr_uid &&
 235                                     (!nfsd->nfsd_nd->nd_nam2 ||
 236                                      netaddr_match(NU_NETFAM(nuidp),
 237                                      &nuidp->nu_haddr, nfsd->nfsd_nd->nd_nam2)))
 238                                         break;
 239                         }
 240                         if (nuidp) {
 241                             nfsrv_setcred(&nuidp->nu_cr,&nfsd->nfsd_nd->nd_cr);
 242                             nfsd->nfsd_nd->nd_flag |= ND_KERBFULL;
 243                         } else {
 244                             /*
 245                              * Nope, so we will.
 246                              */
 247                             if (slp->ns_numuids < nuidhash_max) {
 248                                 slp->ns_numuids++;
 249                                 nuidp = (struct nfsuid *)
 250                                    kmalloc(sizeof (struct nfsuid), M_NFSUID,
 251                                         M_WAITOK);
 252                             } else
 253                                 nuidp = NULL;
 254                             if ((slp->ns_flag & SLP_VALID) == 0) {
 255                                 if (nuidp)
 256                                     kfree((caddr_t)nuidp, M_NFSUID);
 257                             } else {
 258                                 if (nuidp == NULL) {
 259                                     nuidp = TAILQ_FIRST(&slp->ns_uidlruhead);
 260                                     LIST_REMOVE(nuidp, nu_hash);
 261                                     TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp,
 262                                         nu_lru);
 263                                     if (nuidp->nu_flag & NU_NAM)
 264                                         FREE(nuidp->nu_nam, M_SONAME);
 265                                 }
 266                                 nuidp->nu_flag = 0;
 267                                 nuidp->nu_cr = nsd->nsd_cr;
 268                                 if (nuidp->nu_cr.cr_ngroups > NGROUPS)
 269                                     nuidp->nu_cr.cr_ngroups = NGROUPS;
 270                                 nuidp->nu_cr.cr_ref = 1;
 271                                 nuidp->nu_timestamp = nsd->nsd_timestamp;
 272                                 nuidp->nu_expire = time_second + nsd->nsd_ttl;
 273                                 /*
 274                                  * and save the session key in nu_key.
 275                                  */
 276                                 bcopy(nsd->nsd_key, nuidp->nu_key,
 277                                     sizeof (nsd->nsd_key));
 278                                 if (nfsd->nfsd_nd->nd_nam2) {
 279                                     struct sockaddr_in *saddr;
 280
 281                                     saddr = (struct sockaddr_in *)
 282                                             nfsd->nfsd_nd->nd_nam2;
 283                                     switch (saddr->sin_family) {
 284                                     case AF_INET:
 285                                         nuidp->nu_flag |= NU_INETADDR;
 286                                         nuidp->nu_inetaddr =
 287                                              saddr->sin_addr.s_addr;
 288                                         break;
 289                                     case AF_ISO:
 290                                     default:
 291                                         nuidp->nu_flag |= NU_NAM;
 292                                         nuidp->nu_nam =
 293                                           dup_sockaddr(nfsd->nfsd_nd->nd_nam2);
 294                                         break;
 295                                     };
 296                                 }
 297                                 TAILQ_INSERT_TAIL(&slp->ns_uidlruhead, nuidp,
 298                                         nu_lru);
 299                                 LIST_INSERT_HEAD(NUIDHASH(slp, nsd->nsd_uid),
 300                                         nuidp, nu_hash);
 301                                 nfsrv_setcred(&nuidp->nu_cr,
 302                                     &nfsd->nfsd_nd->nd_cr);
 303                                 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL;
 304                             }
 305                         }
 306                 }
 307                 if ((uap->flag & NFSSVC_AUTHINFAIL) && (nfsd = nsd->nsd_nfsd))
 308                         nfsd->nfsd_flag |= NFSD_AUTHFAIL;
 309                 error = nfssvc_nfsd(nsd, uap->argp, td);
 310         }
 311 #endif /* NFS_NOSERVER */
 312         if (error == EINTR || error == ERESTART)
 313                 error = 0;
 314         return (error);
 315 }
 316
 317 #ifndef NFS_NOSERVER
 318 /*
 319  * Adds a socket to the list for servicing by nfsds.
 320  */
 321 static int
 322 nfssvc_addsock(struct file *fp, struct sockaddr *mynam, struct thread *td)
 323 {
 324         int siz;
 325         struct nfssvc_sock *slp;
 326         struct socket *so;
 327         int error;
 328
 329         so = (struct socket *)fp->f_data;
 330 #if 0
 331         tslp = NULL;
 332         /*
 333          * Add it to the list, as required.
 334          */
 335         if (so->so_proto->pr_protocol == IPPROTO_UDP) {
 336                 tslp = nfs_udpsock;
 337                 if (tslp->ns_flag & SLP_VALID) {
 338                         if (mynam != NULL)
 339                                 FREE(mynam, M_SONAME);
 340                         return (EPERM);
 341                 }
 342         }
 343 #endif
 344         /*
 345          * Reserve buffer space in the socket.  Note that due to bugs in
 346          * Linux's delayed-ack code, serious performance degredation may
 347          * occur with linux hosts if the minimum is used.
 348          */
 349         if (so->so_type == SOCK_STREAM)
 350                 siz = NFS_MAXPACKET + sizeof (u_long);
 351         else
 352                 siz = NFS_MAXPACKET;
 353         if (siz < nfs_soreserve)
 354             siz = nfs_soreserve;
 355         if (siz > sb_max_adj) {
 356             kprintf("Warning: vfs.nfs.soreserve (%d) "
 357                 "limited to adjusted sb_max (%ld)\n",
 358                 nfs_soreserve, sb_max_adj);
 359             siz = sb_max_adj;
 360         }
 361
 362         error = soreserve(so, siz, siz, &td->td_proc->p_rlimit[RLIMIT_SBSIZE]);
 363         if (error) {
 364                 if (mynam != NULL)
 365                         FREE(mynam, M_SONAME);
 366                 return (error);
 367         }
 368
 369         /*
 370          * Set protocol specific options { for now TCP only } and
 371          * reserve some space. For datagram sockets, this can get called
 372          * repeatedly for the same socket, but that isn't harmful.
 373          */
 374         if (so->so_type == SOCK_STREAM) {
 375                 struct sockopt sopt;
 376                 int val;
 377
 378                 bzero(&sopt, sizeof sopt);
 379                 sopt.sopt_level = SOL_SOCKET;
 380                 sopt.sopt_name = SO_KEEPALIVE;
 381                 sopt.sopt_val = &val;
 382                 sopt.sopt_valsize = sizeof val;
 383                 val = 1;
 384                 sosetopt(so, &sopt);
 385         }
 386         if (so->so_proto->pr_domain->dom_family == AF_INET &&
 387             so->so_proto->pr_protocol == IPPROTO_TCP) {
 388                 struct sockopt sopt;
 389                 int val;
 390
 391                 bzero(&sopt, sizeof sopt);
 392                 sopt.sopt_level = IPPROTO_TCP;
 393                 sopt.sopt_name = TCP_NODELAY;
 394                 sopt.sopt_val = &val;
 395                 sopt.sopt_valsize = sizeof val;
 396                 val = 1;
 397                 sosetopt(so, &sopt);
 398         }
 399         so->so_rcv.ssb_flags &= ~SSB_NOINTR;
 400         so->so_rcv.ssb_timeo = 0;
 401         so->so_snd.ssb_flags &= ~SSB_NOINTR;
 402         so->so_snd.ssb_timeo = 0;
 403
 404         slp = (struct nfssvc_sock *)kmalloc(sizeof (struct nfssvc_sock),
 405             M_NFSSVC, M_WAITOK | M_ZERO);
 406         STAILQ_INIT(&slp->ns_rec);
 407         TAILQ_INIT(&slp->ns_uidlruhead);
 408         TAILQ_INSERT_TAIL(&nfssvc_sockhead, slp, ns_chain);
 409
 410         slp->ns_so = so;
 411         slp->ns_nam = mynam;
 412         fp->f_count++;
 413         slp->ns_fp = fp;
 414         crit_enter();
 415         so->so_upcallarg = (caddr_t)slp;
 416         so->so_upcall = nfsrv_rcv;
 417         so->so_rcv.ssb_flags |= SSB_UPCALL;
 418         slp->ns_flag = (SLP_VALID | SLP_NEEDQ);
 419         nfsrv_wakenfsd(slp, 1);
 420         crit_exit();
 421         return (0);
 422 }
 423
 424 /*
 425  * Called by nfssvc() for nfsds. Just loops around servicing rpc requests
 426  * until it is killed by a signal.
 427  */
 428 static int
 429 nfssvc_nfsd(struct nfsd_srvargs *nsd, caddr_t argp, struct thread *td)
 430 {
 431         int siz;
 432         struct nfssvc_sock *slp;
 433         struct nfsd *nfsd = nsd->nsd_nfsd;
 434         struct nfsrv_descript *nd = NULL;
 435         struct mbuf *m, *mreq;
 436         int error = 0, cacherep, sotype, writes_todo;
 437         int procrastinate;
 438         u_quad_t cur_usec;
 439
 440 #ifndef nolint
 441         cacherep = RC_DOIT;
 442         writes_todo = 0;
 443 #endif
 444         if (nfsd == NULL) {
 445                 nsd->nsd_nfsd = nfsd = (struct nfsd *)
 446                         kmalloc(sizeof (struct nfsd), M_NFSD, M_WAITOK|M_ZERO);
 447                 crit_enter();
 448                 nfsd->nfsd_td = td;
 449                 TAILQ_INSERT_TAIL(&nfsd_head, nfsd, nfsd_chain);
 450                 nfs_numnfsd++;
 451         } else
 452                 crit_enter();
 453
 454         /*
 455          * Loop getting rpc requests until SIGKILL.
 456          */
 457         for (;;) {
 458                 if ((nfsd->nfsd_flag & NFSD_REQINPROG) == 0) {
 459                         while (nfsd->nfsd_slp == NULL &&
 460                             (nfsd_head_flag & NFSD_CHECKSLP) == 0) {
 461                                 nfsd->nfsd_flag |= NFSD_WAITING;
 462                                 nfsd_waiting++;
 463                                 error = tsleep((caddr_t)nfsd, PCATCH, "nfsd", 0);
 464                                 nfsd_waiting--;
 465                                 if (error)
 466                                         goto done;
 467                         }
 468                         if (nfsd->nfsd_slp == NULL &&
 469                             (nfsd_head_flag & NFSD_CHECKSLP) != 0) {
 470                                 TAILQ_FOREACH(slp, &nfssvc_sockhead, ns_chain) {
 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) == NULL)
 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                                                 MB_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                                 kfree((caddr_t)nd, M_NFSRVDESC);
 512                                 nd = NULL;
 513                         }
 514                         nfsd->nfsd_slp = NULL;
 515                         nfsd->nfsd_flag &= ~NFSD_REQINPROG;
 516                         nfsrv_slpderef(slp);
 517                         continue;
 518                 }
 519                 crit_exit();
 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                     if (nfsd->nfsd_flag & NFSD_AUTHFAIL) {
 550                         nfsd->nfsd_flag &= ~NFSD_AUTHFAIL;
 551                         nd->nd_procnum = NFSPROC_NOOP;
 552                         nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
 553                         cacherep = RC_DOIT;
 554                     } else if (nfs_privport) {
 555                         /* Check if source port is privileged */
 556                         u_short port;
 557                         struct sockaddr *nam = nd->nd_nam;
 558                         struct sockaddr_in *sin;
 559
 560                         sin = (struct sockaddr_in *)nam;
 561                         port = ntohs(sin->sin_port);
 562                         if (port >= IPPORT_RESERVED &&
 563                             nd->nd_procnum != NFSPROC_NULL) {
 564                             nd->nd_procnum = NFSPROC_NOOP;
 565                             nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
 566                             cacherep = RC_DOIT;
 567                             kprintf("NFS request from unprivileged port (%s:%d)\n",
 568                                    inet_ntoa(sin->sin_addr), port);
 569                         }
 570                     }
 571
 572                 }
 573
 574                 /*
 575                  * Loop to get all the write rpc relies that have been
 576                  * gathered together.
 577                  */
 578                 do {
 579                     switch (cacherep) {
 580                     case RC_DOIT:
 581                         if (nd && (nd->nd_flag & ND_NFSV3))
 582                             procrastinate = nfsrvw_procrastinate_v3;
 583                         else
 584                             procrastinate = nfsrvw_procrastinate;
 585                         if (writes_todo || (nd->nd_procnum == NFSPROC_WRITE &&
 586                             procrastinate > 0)
 587                         ) {
 588                             error = nfsrv_writegather(&nd, slp,
 589                                 nfsd->nfsd_td, &mreq);
 590                         } else {
 591                             error = (*(nfsrv3_procs[nd->nd_procnum]))(nd,
 592                                 slp, nfsd->nfsd_td, &mreq);
 593                         }
 594                         if (mreq == NULL)
 595                                 break;
 596                         if (error != 0 && error != NFSERR_RETVOID) {
 597                                 if (nd->nd_procnum != NQNFSPROC_VACATED)
 598                                         nfsstats.srv_errs++;
 599                                 nfsrv_updatecache(nd, FALSE, mreq);
 600                                 if (nd->nd_nam2)
 601                                         FREE(nd->nd_nam2, M_SONAME);
 602                                 break;
 603                         }
 604                         nfsstats.srvrpccnt[nd->nd_procnum]++;
 605                         nfsrv_updatecache(nd, TRUE, mreq);
 606                         nd->nd_mrep = NULL;
 607                     case RC_REPLY:
 608                         m = mreq;
 609                         siz = 0;
 610                         while (m) {
 611                                 siz += m->m_len;
 612                                 m = m->m_next;
 613                         }
 614                         if (siz <= 0 || siz > NFS_MAXPACKET) {
 615                                 kprintf("mbuf siz=%d\n",siz);
 616                                 panic("Bad nfs svc reply");
 617                         }
 618                         m = mreq;
 619                         m->m_pkthdr.len = siz;
 620                         m->m_pkthdr.rcvif = NULL;
 621                         /*
 622                          * For stream protocols, prepend a Sun RPC
 623                          * Record Mark.
 624                          */
 625                         if (sotype == SOCK_STREAM) {
 626                                 M_PREPEND(m, NFSX_UNSIGNED, MB_WAIT);
 627                                 if (m == NULL)
 628                                         return (ENOBUFS);
 629                                 *mtod(m, u_int32_t *) = htonl(0x80000000 | siz);
 630                         }
 631                         if (slp->ns_so->so_proto->pr_flags & PR_CONNREQUIRED)
 632                                 (void) nfs_slplock(slp, 1);
 633                         if (slp->ns_flag & SLP_VALID)
 634                             error = nfs_send(slp->ns_so, nd->nd_nam2, m, NULL);
 635                         else {
 636                             error = EPIPE;
 637                             m_freem(m);
 638                         }
 639                         if (nfsrtton)
 640                                 nfsd_rt(sotype, nd, cacherep);
 641                         if (nd->nd_nam2)
 642                                 FREE(nd->nd_nam2, M_SONAME);
 643                         if (nd->nd_mrep)
 644                                 m_freem(nd->nd_mrep);
 645                         if (error == EPIPE)
 646                                 nfsrv_zapsock(slp);
 647                         if (slp->ns_so->so_proto->pr_flags & PR_CONNREQUIRED)
 648                                 nfs_slpunlock(slp);
 649                         if (error == EINTR || error == ERESTART) {
 650                                 kfree((caddr_t)nd, M_NFSRVDESC);
 651                                 nfsrv_slpderef(slp);
 652                                 crit_enter();
 653                                 goto done;
 654                         }
 655                         break;
 656                     case RC_DROPIT:
 657                         if (nfsrtton)
 658                                 nfsd_rt(sotype, nd, cacherep);
 659                         m_freem(nd->nd_mrep);
 660                         if (nd->nd_nam2)
 661                                 FREE(nd->nd_nam2, M_SONAME);
 662                         break;
 663                     };
 664                     if (nd) {
 665                         FREE((caddr_t)nd, M_NFSRVDESC);
 666                         nd = NULL;
 667                     }
 668
 669                     /*
 670                      * Check to see if there are outstanding writes that
 671                      * need to be serviced.
 672                      */
 673                     cur_usec = nfs_curusec();
 674                     crit_enter();
 675                     if (slp->ns_tq.lh_first &&
 676                         slp->ns_tq.lh_first->nd_time <= cur_usec) {
 677                         cacherep = RC_DOIT;
 678                         writes_todo = 1;
 679                     } else
 680                         writes_todo = 0;
 681                     crit_exit();
 682                 } while (writes_todo);
 683                 crit_enter();
 684                 if (nfsrv_dorec(slp, nfsd, &nd)) {
 685                         nfsd->nfsd_flag &= ~NFSD_REQINPROG;
 686                         nfsd->nfsd_slp = NULL;
 687                         nfsrv_slpderef(slp);
 688                 }
 689         }
 690 done:
 691         TAILQ_REMOVE(&nfsd_head, nfsd, nfsd_chain);
 692         crit_exit();
 693         kfree((caddr_t)nfsd, M_NFSD);
 694         nsd->nsd_nfsd = NULL;
 695         if (--nfs_numnfsd == 0)
 696                 nfsrv_init(TRUE);       /* Reinitialize everything */
 697         return (error);
 698 }
 699
 700 /*
 701  * Shut down a socket associated with an nfssvc_sock structure.
 702  * Should be called with the send lock set, if required.
 703  * The trick here is to increment the sref at the start, so that the nfsds
 704  * will stop using it and clear ns_flag at the end so that it will not be
 705  * reassigned during cleanup.
 706  */
 707 static void
 708 nfsrv_zapsock(struct nfssvc_sock *slp)
 709 {
 710         struct nfsuid *nuidp, *nnuidp;
 711         struct nfsrv_descript *nwp, *nnwp;
 712         struct socket *so;
 713         struct file *fp;
 714         struct nfsrv_rec *rec;
 715
 716         slp->ns_flag &= ~SLP_ALLFLAGS;
 717         fp = slp->ns_fp;
 718         if (fp) {
 719                 slp->ns_fp = NULL;
 720                 so = slp->ns_so;
 721                 so->so_rcv.ssb_flags &= ~SSB_UPCALL;
 722                 so->so_upcall = NULL;
 723                 so->so_upcallarg = NULL;
 724                 soshutdown(so, SHUT_RDWR);
 725                 closef(fp, NULL);
 726                 if (slp->ns_nam)
 727                         FREE(slp->ns_nam, M_SONAME);
 728                 m_freem(slp->ns_raw);
 729                 while ((rec = STAILQ_FIRST(&slp->ns_rec)) != NULL) {
 730                         --slp->ns_numrec;
 731                         STAILQ_REMOVE_HEAD(&slp->ns_rec, nr_link);
 732                         if (rec->nr_address)
 733                                 FREE(rec->nr_address, M_SONAME);
 734                         m_freem(rec->nr_packet);
 735                         kfree(rec, M_NFSRVDESC);
 736                 }
 737                 TAILQ_FOREACH_MUTABLE(nuidp, &slp->ns_uidlruhead, nu_lru,
 738                                       nnuidp) {
 739                         LIST_REMOVE(nuidp, nu_hash);
 740                         TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, nu_lru);
 741                         if (nuidp->nu_flag & NU_NAM)
 742                                 FREE(nuidp->nu_nam, M_SONAME);
 743                         kfree((caddr_t)nuidp, M_NFSUID);
 744                 }
 745                 crit_enter();
 746                 for (nwp = slp->ns_tq.lh_first; nwp; nwp = nnwp) {
 747                         nnwp = nwp->nd_tq.le_next;
 748                         LIST_REMOVE(nwp, nd_tq);
 749                         kfree((caddr_t)nwp, M_NFSRVDESC);
 750                 }
 751                 LIST_INIT(&slp->ns_tq);
 752                 crit_exit();
 753         }
 754 }
 755
 756 /*
 757  * Derefence a server socket structure. If it has no more references and
 758  * is no longer valid, you can throw it away.
 759  */
 760 void
 761 nfsrv_slpderef(struct nfssvc_sock *slp)
 762 {
 763         if (--(slp->ns_sref) == 0 && (slp->ns_flag & SLP_VALID) == 0) {
 764                 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain);
 765                 kfree((caddr_t)slp, M_NFSSVC);
 766         }
 767 }
 768
 769 /*
 770  * Lock a socket against others.
 771  */
 772 int
 773 nfs_slplock(struct nfssvc_sock *slp, int wait)
 774 {
 775         int *statep = &slp->ns_solock;
 776
 777         if (!wait && (*statep & NFSSTA_SNDLOCK))
 778                 return(0);      /* already locked, fail */
 779         while (*statep & NFSSTA_SNDLOCK) {
 780                 *statep |= NFSSTA_WANTSND;
 781                 (void) tsleep((caddr_t)statep, 0, "nfsslplck", 0);
 782         }
 783         *statep |= NFSSTA_SNDLOCK;
 784         return (1);
 785 }
 786
 787 /*
 788  * Unlock the stream socket for others.
 789  */
 790 void
 791 nfs_slpunlock(struct nfssvc_sock *slp)
 792 {
 793         int *statep = &slp->ns_solock;
 794
 795         if ((*statep & NFSSTA_SNDLOCK) == 0)
 796                 panic("nfs slpunlock");
 797         *statep &= ~NFSSTA_SNDLOCK;
 798         if (*statep & NFSSTA_WANTSND) {
 799                 *statep &= ~NFSSTA_WANTSND;
 800                 wakeup((caddr_t)statep);
 801         }
 802 }
 803
 804 /*
 805  * Initialize the data structures for the server.
 806  * Handshake with any new nfsds starting up to avoid any chance of
 807  * corruption.
 808  */
 809 void
 810 nfsrv_init(int terminating)
 811 {
 812         struct nfssvc_sock *slp, *nslp;
 813
 814         if (nfssvc_sockhead_flag & SLP_INIT)
 815                 panic("nfsd init");
 816         nfssvc_sockhead_flag |= SLP_INIT;
 817         if (terminating) {
 818                 TAILQ_FOREACH_MUTABLE(slp, &nfssvc_sockhead, ns_chain, nslp) {
 819                         if (slp->ns_flag & SLP_VALID)
 820                                 nfsrv_zapsock(slp);
 821                         TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain);
 822                         kfree((caddr_t)slp, M_NFSSVC);
 823                 }
 824                 nfsrv_cleancache();     /* And clear out server cache */
 825         } else
 826                 nfs_pub.np_valid = 0;
 827
 828         TAILQ_INIT(&nfssvc_sockhead);
 829         nfssvc_sockhead_flag &= ~SLP_INIT;
 830         if (nfssvc_sockhead_flag & SLP_WANTINIT) {
 831                 nfssvc_sockhead_flag &= ~SLP_WANTINIT;
 832                 wakeup((caddr_t)&nfssvc_sockhead);
 833         }
 834
 835         TAILQ_INIT(&nfsd_head);
 836         nfsd_head_flag &= ~NFSD_CHECKSLP;
 837
 838 #if 0
 839         nfs_udpsock = (struct nfssvc_sock *)
 840             kmalloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK | M_ZERO);
 841         STAILQ_INIT(&nfs_udpsock->ns_rec);
 842         TAILQ_INIT(&nfs_udpsock->ns_uidlruhead);
 843         TAILQ_INSERT_HEAD(&nfssvc_sockhead, nfs_udpsock, ns_chain);
 844
 845         nfs_cltpsock = (struct nfssvc_sock *)
 846             kmalloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK | M_ZERO);
 847         STAILQ_INIT(&nfs_cltpsock->ns_rec);
 848         TAILQ_INIT(&nfs_cltpsock->ns_uidlruhead);
 849         TAILQ_INSERT_TAIL(&nfssvc_sockhead, nfs_cltpsock, ns_chain);
 850 #endif
 851 }
 852
 853 /*
 854  * Add entries to the server monitor log.
 855  */
 856 static void
 857 nfsd_rt(int sotype, struct nfsrv_descript *nd, int cacherep)
 858 {
 859         struct drt *rt;
 860
 861         rt = &nfsdrt.drt[nfsdrt.pos];
 862         if (cacherep == RC_DOIT)
 863                 rt->flag = 0;
 864         else if (cacherep == RC_REPLY)
 865                 rt->flag = DRT_CACHEREPLY;
 866         else
 867                 rt->flag = DRT_CACHEDROP;
 868         if (sotype == SOCK_STREAM)
 869                 rt->flag |= DRT_TCP;
 870         if (nd->nd_flag & ND_NFSV3)
 871                 rt->flag |= DRT_NFSV3;
 872         rt->proc = nd->nd_procnum;
 873         if (nd->nd_nam->sa_family == AF_INET)
 874             rt->ipadr = ((struct sockaddr_in *)nd->nd_nam)->sin_addr.s_addr;
 875         else
 876             rt->ipadr = INADDR_ANY;
 877         rt->resptime = nfs_curusec() - (nd->nd_starttime.tv_sec * 1000000 + nd->nd_starttime.tv_usec);
 878         getmicrotime(&rt->tstamp);
 879         nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ;
 880 }
 881 #endif /* NFS_NOSERVER */
 882
 883 static int nfs_defect = 0;
 884 SYSCTL_INT(_vfs_nfs, OID_AUTO, defect, CTLFLAG_RW, &nfs_defect, 0, "");
 885
 886 /*
 887  * Asynchronous I/O daemons for client nfs.
 888  * They do read-ahead and write-behind operations on the block I/O cache.
 889  * Never returns unless it fails or gets killed.
 890  */
 891 static int
 892 nfssvc_iod(struct thread *td)
 893 {
 894         struct bio *bio;
 895         int i, myiod;
 896         struct nfsmount *nmp;
 897         int error = 0;
 898
 899         /*
 900          * Assign my position or return error if too many already running
 901          */
 902         myiod = -1;
 903         for (i = 0; i < NFS_MAXASYNCDAEMON; i++)
 904                 if (nfs_asyncdaemon[i] == 0) {
 905                         nfs_asyncdaemon[i]++;
 906                         myiod = i;
 907                         break;
 908                 }
 909         if (myiod == -1)
 910                 return (EBUSY);
 911         nfs_numasync++;
 912         /*
 913          * Just loop around doin our stuff until SIGKILL
 914          */
 915         for (;;) {
 916             while (((nmp = nfs_iodmount[myiod]) == NULL
 917                      || TAILQ_EMPTY(&nmp->nm_bioq))
 918                    && error == 0) {
 919                 if (nmp)
 920                     nmp->nm_bioqiods--;
 921                 nfs_iodwant[myiod] = td;
 922                 nfs_iodmount[myiod] = NULL;
 923                 error = tsleep((caddr_t)&nfs_iodwant[myiod],
 924                         PCATCH, "nfsidl", 0);
 925             }
 926             if (error) {
 927                 nfs_asyncdaemon[myiod] = 0;
 928                 if (nmp)
 929                     nmp->nm_bioqiods--;
 930                 nfs_iodwant[myiod] = NULL;
 931                 nfs_iodmount[myiod] = NULL;
 932                 nfs_numasync--;
 933                 return (error);
 934             }
 935             while ((bio = TAILQ_FIRST(&nmp->nm_bioq)) != NULL) {
 936                 /*
 937                  * Take one off the front of the list.   The BIO's
 938                  * block number is normalized for DEV_BSIZE.
 939                  */
 940                 TAILQ_REMOVE(&nmp->nm_bioq, bio, bio_act);
 941                 nmp->nm_bioqlen--;
 942                 if (nmp->nm_bioqwant && nmp->nm_bioqlen <= nfs_numasync) {
 943                     nmp->nm_bioqwant = FALSE;
 944                     wakeup(&nmp->nm_bioq);
 945                 }
 946                 nfs_doio((struct vnode *)bio->bio_driver_info, bio, NULL);
 947                 /*
 948                  * If there are more than one iod on this mount, then defect
 949                  * so that the iods can be shared out fairly between the mounts
 950                  */
 951                 if (nfs_defect && nmp->nm_bioqiods > 1) {
 952                     NFS_DPF(ASYNCIO,
 953                             ("nfssvc_iod: iod %d defecting from mount %p\n",
 954                              myiod, nmp));
 955                     nfs_iodmount[myiod] = NULL;
 956                     nmp->nm_bioqiods--;
 957                     break;
 958                 }
 959             }
 960         }
 961 }
 962
 963
 964 /*
 965  * Get an authorization string for the uid by having the mount_nfs sitting
 966  * on this mount point porpous out of the kernel and do it.
 967  */
 968 int
 969 nfs_getauth(struct nfsmount *nmp, struct nfsreq *rep,
 970             struct ucred *cred, char **auth_str, int *auth_len, char *verf_str,
 971             int *verf_len, NFSKERBKEY_T key /* return session key */)
 972 {
 973         int error = 0;
 974
 975         while ((nmp->nm_state & NFSSTA_WAITAUTH) == 0) {
 976                 nmp->nm_state |= NFSSTA_WANTAUTH;
 977                 (void) tsleep((caddr_t)&nmp->nm_authtype, 0,
 978                         "nfsauth1", 2 * hz);
 979                 error = nfs_sigintr(nmp, rep, rep->r_td);
 980                 if (error) {
 981                         nmp->nm_state &= ~NFSSTA_WANTAUTH;
 982                         return (error);
 983                 }
 984         }
 985         nmp->nm_state &= ~(NFSSTA_WAITAUTH | NFSSTA_WANTAUTH);
 986         nmp->nm_authstr = *auth_str = (char *)kmalloc(RPCAUTH_MAXSIZ, M_TEMP, M_WAITOK);
 987         nmp->nm_authlen = RPCAUTH_MAXSIZ;
 988         nmp->nm_verfstr = verf_str;
 989         nmp->nm_verflen = *verf_len;
 990         nmp->nm_authuid = cred->cr_uid;
 991         wakeup((caddr_t)&nmp->nm_authstr);
 992
 993         /*
 994          * And wait for mount_nfs to do its stuff.
 995          */
 996         while ((nmp->nm_state & NFSSTA_HASAUTH) == 0 && error == 0) {
 997                 (void) tsleep((caddr_t)&nmp->nm_authlen, 0,
 998                         "nfsauth2", 2 * hz);
 999                 error = nfs_sigintr(nmp, rep, rep->r_td);
1000         }
1001         if (nmp->nm_state & NFSSTA_AUTHERR) {
1002                 nmp->nm_state &= ~NFSSTA_AUTHERR;
1003                 error = EAUTH;
1004         }
1005         if (error)
1006                 kfree((caddr_t)*auth_str, M_TEMP);
1007         else {
1008                 *auth_len = nmp->nm_authlen;
1009                 *verf_len = nmp->nm_verflen;
1010                 bcopy((caddr_t)nmp->nm_key, (caddr_t)key, sizeof (key));
1011         }
1012         nmp->nm_state &= ~NFSSTA_HASAUTH;
1013         nmp->nm_state |= NFSSTA_WAITAUTH;
1014         if (nmp->nm_state & NFSSTA_WANTAUTH) {
1015                 nmp->nm_state &= ~NFSSTA_WANTAUTH;
1016                 wakeup((caddr_t)&nmp->nm_authtype);
1017         }
1018         return (error);
1019 }
1020
1021 /*
1022  * Get a nickname authenticator and verifier.
1023  */
1024 int
1025 nfs_getnickauth(struct nfsmount *nmp, struct ucred *cred, char **auth_str,
1026                 int *auth_len, char *verf_str, int verf_len)
1027 {
1028         struct nfsuid *nuidp;
1029         u_int32_t *nickp, *verfp;
1030         struct timeval ktvin, ktvout;
1031
1032 #ifdef DIAGNOSTIC
1033         if (verf_len < (4 * NFSX_UNSIGNED))
1034                 panic("nfs_getnickauth verf too small");
1035 #endif
1036         for (nuidp = NMUIDHASH(nmp, cred->cr_uid)->lh_first;
1037             nuidp != 0; nuidp = nuidp->nu_hash.le_next) {
1038                 if (nuidp->nu_cr.cr_uid == cred->cr_uid)
1039                         break;
1040         }
1041         if (!nuidp || nuidp->nu_expire < time_second)
1042                 return (EACCES);
1043
1044         /*
1045          * Move to the end of the lru list (end of lru == most recently used).
1046          */
1047         TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru);
1048         TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, nu_lru);
1049
1050         nickp = (u_int32_t *)kmalloc(2 * NFSX_UNSIGNED, M_TEMP, M_WAITOK);
1051         *nickp++ = txdr_unsigned(RPCAKN_NICKNAME);
1052         *nickp = txdr_unsigned(nuidp->nu_nickname);
1053         *auth_str = (char *)nickp;
1054         *auth_len = 2 * NFSX_UNSIGNED;
1055
1056         /*
1057          * Now we must encrypt the verifier and package it up.
1058          */
1059         verfp = (u_int32_t *)verf_str;
1060         *verfp++ = txdr_unsigned(RPCAKN_NICKNAME);
1061         if (time_second > nuidp->nu_timestamp.tv_sec ||
1062             (time_second == nuidp->nu_timestamp.tv_sec &&
1063              time_second > nuidp->nu_timestamp.tv_usec))
1064                 getmicrotime(&nuidp->nu_timestamp);
1065         else
1066                 nuidp->nu_timestamp.tv_usec++;
1067         ktvin.tv_sec = txdr_unsigned(nuidp->nu_timestamp.tv_sec);
1068         ktvin.tv_usec = txdr_unsigned(nuidp->nu_timestamp.tv_usec);
1069
1070         /*
1071          * Now encrypt the timestamp verifier in ecb mode using the session
1072          * key.
1073          */
1074 #ifdef NFSKERB
1075         XXX
1076 #endif
1077
1078         *verfp++ = ktvout.tv_sec;
1079         *verfp++ = ktvout.tv_usec;
1080         *verfp = 0;
1081         return (0);
1082 }
1083
1084 /*
1085  * Save the current nickname in a hash list entry on the mount point.
1086  */
1087 int
1088 nfs_savenickauth(struct nfsmount *nmp, struct ucred *cred, int len,
1089                  NFSKERBKEY_T key, struct mbuf **mdp, char **dposp,
1090                  struct mbuf *mrep)
1091 {
1092         struct nfsuid *nuidp;
1093         u_int32_t *tl;
1094         int32_t t1;
1095         struct mbuf *md = *mdp;
1096         struct timeval ktvin, ktvout;
1097         u_int32_t nick;
1098         char *dpos = *dposp, *cp2;
1099         int deltasec, error = 0;
1100
1101         if (len == (3 * NFSX_UNSIGNED)) {
1102                 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
1103                 ktvin.tv_sec = *tl++;
1104                 ktvin.tv_usec = *tl++;
1105                 nick = fxdr_unsigned(u_int32_t, *tl);
1106
1107                 /*
1108                  * Decrypt the timestamp in ecb mode.
1109                  */
1110 #ifdef NFSKERB
1111                 XXX
1112 #endif
1113                 ktvout.tv_sec = fxdr_unsigned(long, ktvout.tv_sec);
1114                 ktvout.tv_usec = fxdr_unsigned(long, ktvout.tv_usec);
1115                 deltasec = time_second - ktvout.tv_sec;
1116                 if (deltasec < 0)
1117                         deltasec = -deltasec;
1118                 /*
1119                  * If ok, add it to the hash list for the mount point.
1120                  */
1121                 if (deltasec <= NFS_KERBCLOCKSKEW) {
1122                         if (nmp->nm_numuids < nuidhash_max) {
1123                                 nmp->nm_numuids++;
1124                                 nuidp = (struct nfsuid *)
1125                                    kmalloc(sizeof (struct nfsuid), M_NFSUID,
1126                                         M_WAITOK);
1127                         } else {
1128                                 nuidp = TAILQ_FIRST(&nmp->nm_uidlruhead);
1129                                 LIST_REMOVE(nuidp, nu_hash);
1130                                 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp,
1131                                         nu_lru);
1132                         }
1133                         nuidp->nu_flag = 0;
1134                         nuidp->nu_cr.cr_uid = cred->cr_uid;
1135                         nuidp->nu_expire = time_second + NFS_KERBTTL;
1136                         nuidp->nu_timestamp = ktvout;
1137                         nuidp->nu_nickname = nick;
1138                         bcopy(key, nuidp->nu_key, sizeof (key));
1139                         TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp,
1140                                 nu_lru);
1141                         LIST_INSERT_HEAD(NMUIDHASH(nmp, cred->cr_uid),
1142                                 nuidp, nu_hash);
1143                 }
1144         } else
1145                 nfsm_adv(nfsm_rndup(len));
1146 nfsmout:
1147         *mdp = md;
1148         *dposp = dpos;
1149         return (error);
1150 }