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