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 1.3 2003/06/23 17:55:48 dillon Exp $
  39  */
  40
  41 #include <sys/param.h>
  42 #include <sys/systm.h>
  43 #include <sys/sysproto.h>
  44 #include <sys/kernel.h>
  45 #include <sys/sysctl.h>
  46 #include <sys/file.h>
  47 #include <sys/filedesc.h>
  48 #include <sys/vnode.h>
  49 #include <sys/malloc.h>
  50 #include <sys/mount.h>
  51 #include <sys/proc.h>
  52 #include <sys/buf.h>
  53 #include <sys/mbuf.h>
  54 #include <sys/socket.h>
  55 #include <sys/socketvar.h>
  56 #include <sys/domain.h>
  57 #include <sys/protosw.h>
  58 #include <sys/namei.h>
  59 #include <vm/vm_zone.h>
  60
  61 #include <netinet/in.h>
  62 #include <netinet/tcp.h>
  63 #include <nfs/xdr_subs.h>
  64 #include <nfs/rpcv2.h>
  65 #include <nfs/nfsproto.h>
  66 #include <nfs/nfs.h>
  67 #include <nfs/nfsm_subs.h>
  68 #include <nfs/nfsrvcache.h>
  69 #include <nfs/nfsmount.h>
  70 #include <nfs/nfsnode.h>
  71 #include <nfs/nqnfs.h>
  72 #include <nfs/nfsrtt.h>
  73
  74 static MALLOC_DEFINE(M_NFSSVC, "NFS srvsock", "Nfs server structure");
  75
  76 /* Global defs. */
  77 extern int32_t (*nfsrv3_procs[NFS_NPROCS]) __P((struct nfsrv_descript *nd,
  78                                             struct nfssvc_sock *slp,
  79                                             struct proc *procp,
  80                                             struct mbuf **mreqp));
  81 extern int nfs_numasync;
  82 extern time_t nqnfsstarttime;
  83 extern int nqsrv_writeslack;
  84 extern int nfsrtton;
  85 extern struct nfsstats nfsstats;
  86 extern int nfsrvw_procrastinate;
  87 extern int nfsrvw_procrastinate_v3;
  88 static int nuidhash_max = NFS_MAXUIDHASH;
  89
  90 #ifndef NFS_NOSERVER
  91 static void     nfsrv_zapsock __P((struct nfssvc_sock *slp));
  92 #endif
  93 static int      nfssvc_iod __P((struct proc *));
  94
  95 #define TRUE    1
  96 #define FALSE   0
  97
  98 static int nfs_asyncdaemon[NFS_MAXASYNCDAEMON];
  99
 100 SYSCTL_DECL(_vfs_nfs);
 101
 102 #ifndef NFS_NOSERVER
 103 int nfsd_waiting = 0;
 104 static struct nfsdrt nfsdrt;
 105 static int nfs_numnfsd = 0;
 106 static int notstarted = 1;
 107 static int modify_flag = 0;
 108 static void     nfsd_rt __P((int sotype, struct nfsrv_descript *nd,
 109                              int cacherep));
 110 static int      nfssvc_addsock __P((struct file *, struct sockaddr *,
 111                                     struct proc *));
 112 static int      nfssvc_nfsd __P((struct nfsd_srvargs *,caddr_t,struct proc *));
 113
 114 static int nfs_privport = 0;
 115 SYSCTL_INT(_vfs_nfs, NFS_NFSPRIVPORT, nfs_privport, CTLFLAG_RW, &nfs_privport, 0, "");
 116 SYSCTL_INT(_vfs_nfs, OID_AUTO, gatherdelay, CTLFLAG_RW, &nfsrvw_procrastinate, 0, "");
 117 SYSCTL_INT(_vfs_nfs, OID_AUTO, gatherdelay_v3, CTLFLAG_RW, &nfsrvw_procrastinate_v3, 0, "");
 118
 119 /*
 120  * NFS server system calls
 121  */
 122
 123 #endif /* NFS_NOSERVER */
 124 /*
 125  * nfssvc_args(int flag, caddr_t argp)
 126  *
 127  * Nfs server psuedo system call for the nfsd's
 128  * Based on the flag value it either:
 129  * - adds a socket to the selection list
 130  * - remains in the kernel as an nfsd
 131  * - remains in the kernel as an nfsiod
 132  */
 133 int
 134 nfssvc(struct nfssvc_args *uap)
 135 {
 136 #ifndef NFS_NOSERVER
 137         struct nameidata nd;
 138         struct file *fp;
 139         struct sockaddr *nam;
 140         struct nfsd_args nfsdarg;
 141         struct nfsd_srvargs nfsd_srvargs, *nsd = &nfsd_srvargs;
 142         struct nfsd_cargs ncd;
 143         struct nfsd *nfsd;
 144         struct nfssvc_sock *slp;
 145         struct nfsuid *nuidp;
 146         struct nfsmount *nmp;
 147 #endif /* NFS_NOSERVER */
 148         int error;
 149         struct proc *p = curproc;
 150
 151         /*
 152          * Must be super user
 153          */
 154         error = suser();
 155         if(error)
 156                 return (error);
 157         while (nfssvc_sockhead_flag & SLP_INIT) {
 158                  nfssvc_sockhead_flag |= SLP_WANTINIT;
 159                 (void) tsleep((caddr_t)&nfssvc_sockhead, PSOCK, "nfsd init", 0);
 160         }
 161         if (uap->flag & NFSSVC_BIOD)
 162                 error = nfssvc_iod(p);
 163 #ifdef NFS_NOSERVER
 164         else
 165                 error = ENXIO;
 166 #else /* !NFS_NOSERVER */
 167         else if (uap->flag & NFSSVC_MNTD) {
 168                 error = copyin(uap->argp, (caddr_t)&ncd, sizeof (ncd));
 169                 if (error)
 170                         return (error);
 171                 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
 172                         ncd.ncd_dirp, p);
 173                 error = namei(&nd);
 174                 if (error)
 175                         return (error);
 176                 NDFREE(&nd, NDF_ONLY_PNBUF);
 177                 if ((nd.ni_vp->v_flag & VROOT) == 0)
 178                         error = EINVAL;
 179                 nmp = VFSTONFS(nd.ni_vp->v_mount);
 180                 vput(nd.ni_vp);
 181                 if (error)
 182                         return (error);
 183                 if ((nmp->nm_state & NFSSTA_MNTD) &&
 184                         (uap->flag & NFSSVC_GOTAUTH) == 0)
 185                         return (0);
 186                 nmp->nm_state |= NFSSTA_MNTD;
 187                 error = nqnfs_clientd(nmp, p->p_ucred, &ncd, uap->flag,
 188                         uap->argp, p);
 189         } else if (uap->flag & NFSSVC_ADDSOCK) {
 190                 error = copyin(uap->argp, (caddr_t)&nfsdarg, sizeof(nfsdarg));
 191                 if (error)
 192                         return (error);
 193                 error = holdsock(p->p_fd, nfsdarg.sock, &fp);
 194                 if (error)
 195                         return (error);
 196                 /*
 197                  * Get the client address for connected sockets.
 198                  */
 199                 if (nfsdarg.name == NULL || nfsdarg.namelen == 0)
 200                         nam = (struct sockaddr *)0;
 201                 else {
 202                         error = getsockaddr(&nam, nfsdarg.name,
 203                                             nfsdarg.namelen);
 204                         if (error) {
 205                                 fdrop(fp, p);
 206                                 return (error);
 207                         }
 208                 }
 209                 error = nfssvc_addsock(fp, nam, p);
 210                 fdrop(fp, p);
 211         } else {
 212                 error = copyin(uap->argp, (caddr_t)nsd, sizeof (*nsd));
 213                 if (error)
 214                         return (error);
 215                 if ((uap->flag & NFSSVC_AUTHIN) &&
 216                     ((nfsd = nsd->nsd_nfsd)) != NULL &&
 217                     (nfsd->nfsd_slp->ns_flag & SLP_VALID)) {
 218                         slp = nfsd->nfsd_slp;
 219
 220                         /*
 221                          * First check to see if another nfsd has already
 222                          * added this credential.
 223                          */
 224                         for (nuidp = NUIDHASH(slp,nsd->nsd_cr.cr_uid)->lh_first;
 225                             nuidp != 0; nuidp = nuidp->nu_hash.le_next) {
 226                                 if (nuidp->nu_cr.cr_uid == nsd->nsd_cr.cr_uid &&
 227                                     (!nfsd->nfsd_nd->nd_nam2 ||
 228                                      netaddr_match(NU_NETFAM(nuidp),
 229                                      &nuidp->nu_haddr, nfsd->nfsd_nd->nd_nam2)))
 230                                         break;
 231                         }
 232                         if (nuidp) {
 233                             nfsrv_setcred(&nuidp->nu_cr,&nfsd->nfsd_nd->nd_cr);
 234                             nfsd->nfsd_nd->nd_flag |= ND_KERBFULL;
 235                         } else {
 236                             /*
 237                              * Nope, so we will.
 238                              */
 239                             if (slp->ns_numuids < nuidhash_max) {
 240                                 slp->ns_numuids++;
 241                                 nuidp = (struct nfsuid *)
 242                                    malloc(sizeof (struct nfsuid), M_NFSUID,
 243                                         M_WAITOK);
 244                             } else
 245                                 nuidp = (struct nfsuid *)0;
 246                             if ((slp->ns_flag & SLP_VALID) == 0) {
 247                                 if (nuidp)
 248                                     free((caddr_t)nuidp, M_NFSUID);
 249                             } else {
 250                                 if (nuidp == (struct nfsuid *)0) {
 251                                     nuidp = slp->ns_uidlruhead.tqh_first;
 252                                     LIST_REMOVE(nuidp, nu_hash);
 253                                     TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp,
 254                                         nu_lru);
 255                                     if (nuidp->nu_flag & NU_NAM)
 256                                         FREE(nuidp->nu_nam, M_SONAME);
 257                                 }
 258                                 nuidp->nu_flag = 0;
 259                                 nuidp->nu_cr = nsd->nsd_cr;
 260                                 if (nuidp->nu_cr.cr_ngroups > NGROUPS)
 261                                     nuidp->nu_cr.cr_ngroups = NGROUPS;
 262                                 nuidp->nu_cr.cr_ref = 1;
 263                                 nuidp->nu_timestamp = nsd->nsd_timestamp;
 264                                 nuidp->nu_expire = time_second + nsd->nsd_ttl;
 265                                 /*
 266                                  * and save the session key in nu_key.
 267                                  */
 268                                 bcopy(nsd->nsd_key, nuidp->nu_key,
 269                                     sizeof (nsd->nsd_key));
 270                                 if (nfsd->nfsd_nd->nd_nam2) {
 271                                     struct sockaddr_in *saddr;
 272
 273                                     saddr = (struct sockaddr_in *)
 274                                             nfsd->nfsd_nd->nd_nam2;
 275                                     switch (saddr->sin_family) {
 276                                     case AF_INET:
 277                                         nuidp->nu_flag |= NU_INETADDR;
 278                                         nuidp->nu_inetaddr =
 279                                              saddr->sin_addr.s_addr;
 280                                         break;
 281                                     case AF_ISO:
 282                                     default:
 283                                         nuidp->nu_flag |= NU_NAM;
 284                                         nuidp->nu_nam =
 285                                                 dup_sockaddr(nfsd->nfsd_nd->
 286                                                              nd_nam2, 1);
 287                                         break;
 288                                     };
 289                                 }
 290                                 TAILQ_INSERT_TAIL(&slp->ns_uidlruhead, nuidp,
 291                                         nu_lru);
 292                                 LIST_INSERT_HEAD(NUIDHASH(slp, nsd->nsd_uid),
 293                                         nuidp, nu_hash);
 294                                 nfsrv_setcred(&nuidp->nu_cr,
 295                                     &nfsd->nfsd_nd->nd_cr);
 296                                 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL;
 297                             }
 298                         }
 299                 }
 300                 if ((uap->flag & NFSSVC_AUTHINFAIL) && (nfsd = nsd->nsd_nfsd))
 301                         nfsd->nfsd_flag |= NFSD_AUTHFAIL;
 302                 error = nfssvc_nfsd(nsd, uap->argp, p);
 303         }
 304 #endif /* NFS_NOSERVER */
 305         if (error == EINTR || error == ERESTART)
 306                 error = 0;
 307         return (error);
 308 }
 309
 310 #ifndef NFS_NOSERVER
 311 /*
 312  * Adds a socket to the list for servicing by nfsds.
 313  */
 314 static int
 315 nfssvc_addsock(fp, mynam, p)
 316         struct file *fp;
 317         struct sockaddr *mynam;
 318         struct proc *p;
 319 {
 320         register int siz;
 321         register struct nfssvc_sock *slp;
 322         register struct socket *so;
 323         int error, s;
 324
 325         so = (struct socket *)fp->f_data;
 326 #if 0
 327         tslp = (struct nfssvc_sock *)0;
 328         /*
 329          * Add it to the list, as required.
 330          */
 331         if (so->so_proto->pr_protocol == IPPROTO_UDP) {
 332                 tslp = nfs_udpsock;
 333                 if (tslp->ns_flag & SLP_VALID) {
 334                         if (mynam != NULL)
 335                                 FREE(mynam, M_SONAME);
 336                         return (EPERM);
 337                 }
 338         }
 339 #endif
 340         if (so->so_type == SOCK_STREAM)
 341                 siz = NFS_MAXPACKET + sizeof (u_long);
 342         else
 343                 siz = NFS_MAXPACKET;
 344         error = soreserve(so, siz, siz);
 345         if (error) {
 346                 if (mynam != NULL)
 347                         FREE(mynam, M_SONAME);
 348                 return (error);
 349         }
 350
 351         /*
 352          * Set protocol specific options { for now TCP only } and
 353          * reserve some space. For datagram sockets, this can get called
 354          * repeatedly for the same socket, but that isn't harmful.
 355          */
 356         if (so->so_type == SOCK_STREAM) {
 357                 struct sockopt sopt;
 358                 int val;
 359
 360                 bzero(&sopt, sizeof sopt);
 361                 sopt.sopt_level = SOL_SOCKET;
 362                 sopt.sopt_name = SO_KEEPALIVE;
 363                 sopt.sopt_val = &val;
 364                 sopt.sopt_valsize = sizeof val;
 365                 val = 1;
 366                 sosetopt(so, &sopt);
 367         }
 368         if (so->so_proto->pr_domain->dom_family == AF_INET &&
 369             so->so_proto->pr_protocol == IPPROTO_TCP) {
 370                 struct sockopt sopt;
 371                 int val;
 372
 373                 bzero(&sopt, sizeof sopt);
 374                 sopt.sopt_level = IPPROTO_TCP;
 375                 sopt.sopt_name = TCP_NODELAY;
 376                 sopt.sopt_val = &val;
 377                 sopt.sopt_valsize = sizeof val;
 378                 val = 1;
 379                 sosetopt(so, &sopt);
 380         }
 381         so->so_rcv.sb_flags &= ~SB_NOINTR;
 382         so->so_rcv.sb_timeo = 0;
 383         so->so_snd.sb_flags &= ~SB_NOINTR;
 384         so->so_snd.sb_timeo = 0;
 385
 386         slp = (struct nfssvc_sock *)
 387                 malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK);
 388         bzero((caddr_t)slp, sizeof (struct nfssvc_sock));
 389         STAILQ_INIT(&slp->ns_rec);
 390         TAILQ_INIT(&slp->ns_uidlruhead);
 391         TAILQ_INSERT_TAIL(&nfssvc_sockhead, slp, ns_chain);
 392
 393         slp->ns_so = so;
 394         slp->ns_nam = mynam;
 395         fp->f_count++;
 396         slp->ns_fp = fp;
 397         s = splnet();
 398         so->so_upcallarg = (caddr_t)slp;
 399         so->so_upcall = nfsrv_rcv;
 400         so->so_rcv.sb_flags |= SB_UPCALL;
 401         slp->ns_flag = (SLP_VALID | SLP_NEEDQ);
 402         nfsrv_wakenfsd(slp);
 403         splx(s);
 404         return (0);
 405 }
 406
 407 /*
 408  * Called by nfssvc() for nfsds. Just loops around servicing rpc requests
 409  * until it is killed by a signal.
 410  */
 411 static int
 412 nfssvc_nfsd(nsd, argp, p)
 413         struct nfsd_srvargs *nsd;
 414         caddr_t argp;
 415         struct proc *p;
 416 {
 417         register int siz;
 418         register struct nfssvc_sock *slp;
 419         struct nfsd *nfsd = nsd->nsd_nfsd;
 420         struct nfsrv_descript *nd = NULL;
 421         struct mbuf *m, *mreq;
 422         int error = 0, cacherep, s, sotype, writes_todo;
 423         int procrastinate;
 424         u_quad_t cur_usec;
 425
 426 #ifndef nolint
 427         cacherep = RC_DOIT;
 428         writes_todo = 0;
 429 #endif
 430         if (nfsd == (struct nfsd *)0) {
 431                 nsd->nsd_nfsd = nfsd = (struct nfsd *)
 432                         malloc(sizeof (struct nfsd), M_NFSD, M_WAITOK);
 433                 bzero((caddr_t)nfsd, sizeof (struct nfsd));
 434                 s = splnet();
 435                 nfsd->nfsd_procp = p;
 436                 TAILQ_INSERT_TAIL(&nfsd_head, nfsd, nfsd_chain);
 437                 nfs_numnfsd++;
 438         } else
 439                 s = splnet();
 440
 441         /*
 442          * Loop getting rpc requests until SIGKILL.
 443          */
 444         for (;;) {
 445                 if ((nfsd->nfsd_flag & NFSD_REQINPROG) == 0) {
 446                         while (nfsd->nfsd_slp == (struct nfssvc_sock *)0 &&
 447                             (nfsd_head_flag & NFSD_CHECKSLP) == 0) {
 448                                 nfsd->nfsd_flag |= NFSD_WAITING;
 449                                 nfsd_waiting++;
 450                                 error = tsleep((caddr_t)nfsd, PSOCK | PCATCH,
 451                                     "nfsd", 0);
 452                                 nfsd_waiting--;
 453                                 if (error)
 454                                         goto done;
 455                         }
 456                         if (nfsd->nfsd_slp == (struct nfssvc_sock *)0 &&
 457                             (nfsd_head_flag & NFSD_CHECKSLP) != 0) {
 458                                 for (slp = nfssvc_sockhead.tqh_first; slp != 0;
 459                                     slp = slp->ns_chain.tqe_next) {
 460                                     if ((slp->ns_flag & (SLP_VALID | SLP_DOREC))
 461                                         == (SLP_VALID | SLP_DOREC)) {
 462                                             slp->ns_flag &= ~SLP_DOREC;
 463                                             slp->ns_sref++;
 464                                             nfsd->nfsd_slp = slp;
 465                                             break;
 466                                     }
 467                                 }
 468                                 if (slp == 0)
 469                                         nfsd_head_flag &= ~NFSD_CHECKSLP;
 470                         }
 471                         if ((slp = nfsd->nfsd_slp) == (struct nfssvc_sock *)0)
 472                                 continue;
 473                         if (slp->ns_flag & SLP_VALID) {
 474                                 if (slp->ns_flag & SLP_DISCONN)
 475                                         nfsrv_zapsock(slp);
 476                                 else if (slp->ns_flag & SLP_NEEDQ) {
 477                                         slp->ns_flag &= ~SLP_NEEDQ;
 478                                         (void) nfs_slplock(slp, 1);
 479                                         nfsrv_rcv(slp->ns_so, (caddr_t)slp,
 480                                                 M_WAIT);
 481                                         nfs_slpunlock(slp);
 482                                 }
 483                                 error = nfsrv_dorec(slp, nfsd, &nd);
 484                                 cur_usec = nfs_curusec();
 485                                 if (error && slp->ns_tq.lh_first &&
 486                                     slp->ns_tq.lh_first->nd_time <= cur_usec) {
 487                                         error = 0;
 488                                         cacherep = RC_DOIT;
 489                                         writes_todo = 1;
 490                                 } else
 491                                         writes_todo = 0;
 492                                 nfsd->nfsd_flag |= NFSD_REQINPROG;
 493                         }
 494                 } else {
 495                         error = 0;
 496                         slp = nfsd->nfsd_slp;
 497                 }
 498                 if (error || (slp->ns_flag & SLP_VALID) == 0) {
 499                         if (nd) {
 500                                 free((caddr_t)nd, M_NFSRVDESC);
 501                                 nd = NULL;
 502                         }
 503                         nfsd->nfsd_slp = (struct nfssvc_sock *)0;
 504                         nfsd->nfsd_flag &= ~NFSD_REQINPROG;
 505                         nfsrv_slpderef(slp);
 506                         continue;
 507                 }
 508                 splx(s);
 509                 sotype = slp->ns_so->so_type;
 510                 if (nd) {
 511                     getmicrotime(&nd->nd_starttime);
 512                     if (nd->nd_nam2)
 513                         nd->nd_nam = nd->nd_nam2;
 514                     else
 515                         nd->nd_nam = slp->ns_nam;
 516
 517                     /*
 518                      * Check to see if authorization is needed.
 519                      */
 520                     if (nfsd->nfsd_flag & NFSD_NEEDAUTH) {
 521                         nfsd->nfsd_flag &= ~NFSD_NEEDAUTH;
 522                         nsd->nsd_haddr =
 523                                 ((struct sockaddr_in *)
 524                                  nd->nd_nam)->sin_addr.s_addr;
 525                         nsd->nsd_authlen = nfsd->nfsd_authlen;
 526                         nsd->nsd_verflen = nfsd->nfsd_verflen;
 527                         if (!copyout(nfsd->nfsd_authstr,nsd->nsd_authstr,
 528                                 nfsd->nfsd_authlen) &&
 529                             !copyout(nfsd->nfsd_verfstr, nsd->nsd_verfstr,
 530                                 nfsd->nfsd_verflen) &&
 531                             !copyout((caddr_t)nsd, argp, sizeof (*nsd)))
 532                             return (ENEEDAUTH);
 533                         cacherep = RC_DROPIT;
 534                     } else
 535                         cacherep = nfsrv_getcache(nd, slp, &mreq);
 536
 537                     /*
 538                      * Check for just starting up for NQNFS and send
 539                      * fake "try again later" replies to the NQNFS clients.
 540                      */
 541                     if (notstarted && nqnfsstarttime <= time_second) {
 542                         if (modify_flag) {
 543                                 nqnfsstarttime = time_second + nqsrv_writeslack;
 544                                 modify_flag = 0;
 545                         } else
 546                                 notstarted = 0;
 547                     }
 548                     if (notstarted) {
 549                         if ((nd->nd_flag & ND_NQNFS) == 0)
 550                                 cacherep = RC_DROPIT;
 551                         else if (nd->nd_procnum != NFSPROC_WRITE) {
 552                                 nd->nd_procnum = NFSPROC_NOOP;
 553                                 nd->nd_repstat = NQNFS_TRYLATER;
 554                                 cacherep = RC_DOIT;
 555                         } else
 556                                 modify_flag = 1;
 557                     } else if (nfsd->nfsd_flag & NFSD_AUTHFAIL) {
 558                         nfsd->nfsd_flag &= ~NFSD_AUTHFAIL;
 559                         nd->nd_procnum = NFSPROC_NOOP;
 560                         nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
 561                         cacherep = RC_DOIT;
 562                     } else if (nfs_privport) {
 563                         /* Check if source port is privileged */
 564                         u_short port;
 565                         struct sockaddr *nam = nd->nd_nam;
 566                         struct sockaddr_in *sin;
 567
 568                         sin = (struct sockaddr_in *)nam;
 569                         port = ntohs(sin->sin_port);
 570                         if (port >= IPPORT_RESERVED &&
 571                             nd->nd_procnum != NFSPROC_NULL) {
 572                             nd->nd_procnum = NFSPROC_NOOP;
 573                             nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
 574                             cacherep = RC_DOIT;
 575                             printf("NFS request from unprivileged port (%s:%d)\n",
 576                                    inet_ntoa(sin->sin_addr), port);
 577                         }
 578                     }
 579
 580                 }
 581
 582                 /*
 583                  * Loop to get all the write rpc relies that have been
 584                  * gathered together.
 585                  */
 586                 do {
 587                     switch (cacherep) {
 588                     case RC_DOIT:
 589                         if (nd && (nd->nd_flag & ND_NFSV3))
 590                             procrastinate = nfsrvw_procrastinate_v3;
 591                         else
 592                             procrastinate = nfsrvw_procrastinate;
 593                         if (writes_todo || (nd->nd_procnum == NFSPROC_WRITE &&
 594                             procrastinate > 0 && !notstarted))
 595                             error = nfsrv_writegather(&nd, slp,
 596                                 nfsd->nfsd_procp, &mreq);
 597                         else
 598                             error = (*(nfsrv3_procs[nd->nd_procnum]))(nd,
 599                                 slp, nfsd->nfsd_procp, &mreq);
 600                         if (mreq == NULL)
 601                                 break;
 602                         if (error != 0 && error != NFSERR_RETVOID) {
 603                                 if (nd->nd_procnum != NQNFSPROC_VACATED)
 604                                         nfsstats.srv_errs++;
 605                                 nfsrv_updatecache(nd, FALSE, mreq);
 606                                 if (nd->nd_nam2)
 607                                         FREE(nd->nd_nam2, M_SONAME);
 608                                 break;
 609                         }
 610                         nfsstats.srvrpccnt[nd->nd_procnum]++;
 611                         nfsrv_updatecache(nd, TRUE, mreq);
 612                         nd->nd_mrep = (struct mbuf *)0;
 613                     case RC_REPLY:
 614                         m = mreq;
 615                         siz = 0;
 616                         while (m) {
 617                                 siz += m->m_len;
 618                                 m = m->m_next;
 619                         }
 620                         if (siz <= 0 || siz > NFS_MAXPACKET) {
 621                                 printf("mbuf siz=%d\n",siz);
 622                                 panic("Bad nfs svc reply");
 623                         }
 624                         m = mreq;
 625                         m->m_pkthdr.len = siz;
 626                         m->m_pkthdr.rcvif = (struct ifnet *)0;
 627                         /*
 628                          * For stream protocols, prepend a Sun RPC
 629                          * Record Mark.
 630                          */
 631                         if (sotype == SOCK_STREAM) {
 632                                 M_PREPEND(m, NFSX_UNSIGNED, M_WAIT);
 633                                 *mtod(m, u_int32_t *) = htonl(0x80000000 | siz);
 634                         }
 635                         if (slp->ns_so->so_proto->pr_flags & PR_CONNREQUIRED)
 636                                 (void) nfs_slplock(slp, 1);
 637                         if (slp->ns_flag & SLP_VALID)
 638                             error = nfs_send(slp->ns_so, nd->nd_nam2, m, NULL);
 639                         else {
 640                             error = EPIPE;
 641                             m_freem(m);
 642                         }
 643                         if (nfsrtton)
 644                                 nfsd_rt(sotype, nd, cacherep);
 645                         if (nd->nd_nam2)
 646                                 FREE(nd->nd_nam2, M_SONAME);
 647                         if (nd->nd_mrep)
 648                                 m_freem(nd->nd_mrep);
 649                         if (error == EPIPE)
 650                                 nfsrv_zapsock(slp);
 651                         if (slp->ns_so->so_proto->pr_flags & PR_CONNREQUIRED)
 652                                 nfs_slpunlock(slp);
 653                         if (error == EINTR || error == ERESTART) {
 654                                 free((caddr_t)nd, M_NFSRVDESC);
 655                                 nfsrv_slpderef(slp);
 656                                 s = splnet();
 657                                 goto done;
 658                         }
 659                         break;
 660                     case RC_DROPIT:
 661                         if (nfsrtton)
 662                                 nfsd_rt(sotype, nd, cacherep);
 663                         m_freem(nd->nd_mrep);
 664                         if (nd->nd_nam2)
 665                                 FREE(nd->nd_nam2, M_SONAME);
 666                         break;
 667                     };
 668                     if (nd) {
 669                         FREE((caddr_t)nd, M_NFSRVDESC);
 670                         nd = NULL;
 671                     }
 672
 673                     /*
 674                      * Check to see if there are outstanding writes that
 675                      * need to be serviced.
 676                      */
 677                     cur_usec = nfs_curusec();
 678                     s = splsoftclock();
 679                     if (slp->ns_tq.lh_first &&
 680                         slp->ns_tq.lh_first->nd_time <= cur_usec) {
 681                         cacherep = RC_DOIT;
 682                         writes_todo = 1;
 683                     } else
 684                         writes_todo = 0;
 685                     splx(s);
 686                 } while (writes_todo);
 687                 s = splnet();
 688                 if (nfsrv_dorec(slp, nfsd, &nd)) {
 689                         nfsd->nfsd_flag &= ~NFSD_REQINPROG;
 690                         nfsd->nfsd_slp = NULL;
 691                         nfsrv_slpderef(slp);
 692                 }
 693         }
 694 done:
 695         TAILQ_REMOVE(&nfsd_head, nfsd, nfsd_chain);
 696         splx(s);
 697         free((caddr_t)nfsd, M_NFSD);
 698         nsd->nsd_nfsd = (struct nfsd *)0;
 699         if (--nfs_numnfsd == 0)
 700                 nfsrv_init(TRUE);       /* Reinitialize everything */
 701         return (error);
 702 }
 703
 704 /*
 705  * Shut down a socket associated with an nfssvc_sock structure.
 706  * Should be called with the send lock set, if required.
 707  * The trick here is to increment the sref at the start, so that the nfsds
 708  * will stop using it and clear ns_flag at the end so that it will not be
 709  * reassigned during cleanup.
 710  */
 711 static void
 712 nfsrv_zapsock(slp)
 713         register struct nfssvc_sock *slp;
 714 {
 715         register struct nfsuid *nuidp, *nnuidp;
 716         register struct nfsrv_descript *nwp, *nnwp;
 717         struct socket *so;
 718         struct file *fp;
 719         struct nfsrv_rec *rec;
 720         int s;
 721
 722         slp->ns_flag &= ~SLP_ALLFLAGS;
 723         fp = slp->ns_fp;
 724         if (fp) {
 725                 slp->ns_fp = (struct file *)0;
 726                 so = slp->ns_so;
 727                 so->so_rcv.sb_flags &= ~SB_UPCALL;
 728                 so->so_upcall = NULL;
 729                 so->so_upcallarg = NULL;
 730                 soshutdown(so, 2);
 731                 closef(fp, (struct proc *)0);
 732                 if (slp->ns_nam)
 733                         FREE(slp->ns_nam, M_SONAME);
 734                 m_freem(slp->ns_raw);
 735                 while ((rec = STAILQ_FIRST(&slp->ns_rec)) != NULL) {
 736                         STAILQ_REMOVE_HEAD(&slp->ns_rec, nr_link);
 737                         if (rec->nr_address)
 738                                 FREE(rec->nr_address, M_SONAME);
 739                         m_freem(rec->nr_packet);
 740                         free(rec, M_NFSRVDESC);
 741                 }
 742                 for (nuidp = slp->ns_uidlruhead.tqh_first; nuidp != 0;
 743                     nuidp = nnuidp) {
 744                         nnuidp = nuidp->nu_lru.tqe_next;
 745                         LIST_REMOVE(nuidp, nu_hash);
 746                         TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, nu_lru);
 747                         if (nuidp->nu_flag & NU_NAM)
 748                                 FREE(nuidp->nu_nam, M_SONAME);
 749                         free((caddr_t)nuidp, M_NFSUID);
 750                 }
 751                 s = splsoftclock();
 752                 for (nwp = slp->ns_tq.lh_first; nwp; nwp = nnwp) {
 753                         nnwp = nwp->nd_tq.le_next;
 754                         LIST_REMOVE(nwp, nd_tq);
 755                         free((caddr_t)nwp, M_NFSRVDESC);
 756                 }
 757                 LIST_INIT(&slp->ns_tq);
 758                 splx(s);
 759         }
 760 }
 761
 762 /*
 763  * Derefence a server socket structure. If it has no more references and
 764  * is no longer valid, you can throw it away.
 765  */
 766 void
 767 nfsrv_slpderef(slp)
 768         register struct nfssvc_sock *slp;
 769 {
 770         if (--(slp->ns_sref) == 0 && (slp->ns_flag & SLP_VALID) == 0) {
 771                 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain);
 772                 free((caddr_t)slp, M_NFSSVC);
 773         }
 774 }
 775
 776 /*
 777  * Lock a socket against others.
 778  */
 779 int
 780 nfs_slplock(slp, wait)
 781         register struct nfssvc_sock *slp;
 782         int wait;
 783 {
 784         int *statep = &slp->ns_solock;
 785
 786         if (!wait && (*statep & NFSSTA_SNDLOCK))
 787                 return(0);      /* already locked, fail */
 788         while (*statep & NFSSTA_SNDLOCK) {
 789                 *statep |= NFSSTA_WANTSND;
 790                 (void) tsleep((caddr_t)statep, PZERO - 1, "nfsslplck", 0);
 791         }
 792         *statep |= NFSSTA_SNDLOCK;
 793         return (1);
 794 }
 795
 796 /*
 797  * Unlock the stream socket for others.
 798  */
 799 void
 800 nfs_slpunlock(slp)
 801         register struct nfssvc_sock *slp;
 802 {
 803         int *statep = &slp->ns_solock;
 804
 805         if ((*statep & NFSSTA_SNDLOCK) == 0)
 806                 panic("nfs slpunlock");
 807         *statep &= ~NFSSTA_SNDLOCK;
 808         if (*statep & NFSSTA_WANTSND) {
 809                 *statep &= ~NFSSTA_WANTSND;
 810                 wakeup((caddr_t)statep);
 811         }
 812 }
 813
 814 /*
 815  * Initialize the data structures for the server.
 816  * Handshake with any new nfsds starting up to avoid any chance of
 817  * corruption.
 818  */
 819 void
 820 nfsrv_init(terminating)
 821         int terminating;
 822 {
 823         register struct nfssvc_sock *slp, *nslp;
 824
 825         if (nfssvc_sockhead_flag & SLP_INIT)
 826                 panic("nfsd init");
 827         nfssvc_sockhead_flag |= SLP_INIT;
 828         if (terminating) {
 829                 for (slp = nfssvc_sockhead.tqh_first; slp != 0; slp = nslp) {
 830                         nslp = slp->ns_chain.tqe_next;
 831                         if (slp->ns_flag & SLP_VALID)
 832                                 nfsrv_zapsock(slp);
 833                         TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain);
 834                         free((caddr_t)slp, M_NFSSVC);
 835                 }
 836                 nfsrv_cleancache();     /* And clear out server cache */
 837         } else
 838                 nfs_pub.np_valid = 0;
 839
 840         TAILQ_INIT(&nfssvc_sockhead);
 841         nfssvc_sockhead_flag &= ~SLP_INIT;
 842         if (nfssvc_sockhead_flag & SLP_WANTINIT) {
 843                 nfssvc_sockhead_flag &= ~SLP_WANTINIT;
 844                 wakeup((caddr_t)&nfssvc_sockhead);
 845         }
 846
 847         TAILQ_INIT(&nfsd_head);
 848         nfsd_head_flag &= ~NFSD_CHECKSLP;
 849
 850 #if 0
 851         nfs_udpsock = (struct nfssvc_sock *)
 852             malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK);
 853         bzero((caddr_t)nfs_udpsock, sizeof (struct nfssvc_sock));
 854         STAILQ_INIT(&nfs_udpsock->ns_rec);
 855         TAILQ_INIT(&nfs_udpsock->ns_uidlruhead);
 856         TAILQ_INSERT_HEAD(&nfssvc_sockhead, nfs_udpsock, ns_chain);
 857
 858         nfs_cltpsock = (struct nfssvc_sock *)
 859             malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK);
 860         bzero((caddr_t)nfs_cltpsock, sizeof (struct nfssvc_sock));
 861         STAILQ_INIT(&nfs_cltpsock->ns_rec);
 862         TAILQ_INIT(&nfs_cltpsock->ns_uidlruhead);
 863         TAILQ_INSERT_TAIL(&nfssvc_sockhead, nfs_cltpsock, ns_chain);
 864 #endif
 865 }
 866
 867 /*
 868  * Add entries to the server monitor log.
 869  */
 870 static void
 871 nfsd_rt(sotype, nd, cacherep)
 872         int sotype;
 873         register struct nfsrv_descript *nd;
 874         int cacherep;
 875 {
 876         register struct drt *rt;
 877
 878         rt = &nfsdrt.drt[nfsdrt.pos];
 879         if (cacherep == RC_DOIT)
 880                 rt->flag = 0;
 881         else if (cacherep == RC_REPLY)
 882                 rt->flag = DRT_CACHEREPLY;
 883         else
 884                 rt->flag = DRT_CACHEDROP;
 885         if (sotype == SOCK_STREAM)
 886                 rt->flag |= DRT_TCP;
 887         if (nd->nd_flag & ND_NQNFS)
 888                 rt->flag |= DRT_NQNFS;
 889         else if (nd->nd_flag & ND_NFSV3)
 890                 rt->flag |= DRT_NFSV3;
 891         rt->proc = nd->nd_procnum;
 892         if (nd->nd_nam->sa_family == AF_INET)
 893             rt->ipadr = ((struct sockaddr_in *)nd->nd_nam)->sin_addr.s_addr;
 894         else
 895             rt->ipadr = INADDR_ANY;
 896         rt->resptime = nfs_curusec() - (nd->nd_starttime.tv_sec * 1000000 + nd->nd_starttime.tv_usec);
 897         getmicrotime(&rt->tstamp);
 898         nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ;
 899 }
 900 #endif /* NFS_NOSERVER */
 901
 902 static int nfs_defect = 0;
 903 SYSCTL_INT(_vfs_nfs, OID_AUTO, defect, CTLFLAG_RW, &nfs_defect, 0, "");
 904
 905 /*
 906  * Asynchronous I/O daemons for client nfs.
 907  * They do read-ahead and write-behind operations on the block I/O cache.
 908  * Never returns unless it fails or gets killed.
 909  */
 910 static int
 911 nfssvc_iod(p)
 912         struct proc *p;
 913 {
 914         register struct buf *bp;
 915         register int i, myiod;
 916         struct nfsmount *nmp;
 917         int error = 0;
 918
 919         /*
 920          * Assign my position or return error if too many already running
 921          */
 922         myiod = -1;
 923         for (i = 0; i < NFS_MAXASYNCDAEMON; i++)
 924                 if (nfs_asyncdaemon[i] == 0) {
 925                         nfs_asyncdaemon[i]++;
 926                         myiod = i;
 927                         break;
 928                 }
 929         if (myiod == -1)
 930                 return (EBUSY);
 931         nfs_numasync++;
 932         /*
 933          * Just loop around doin our stuff until SIGKILL
 934          */
 935         for (;;) {
 936             while (((nmp = nfs_iodmount[myiod]) == NULL
 937                     || nmp->nm_bufq.tqh_first == NULL)
 938                    && error == 0) {
 939                 if (nmp)
 940                     nmp->nm_bufqiods--;
 941                 nfs_iodwant[myiod] = p;
 942                 nfs_iodmount[myiod] = NULL;
 943                 error = tsleep((caddr_t)&nfs_iodwant[myiod],
 944                         PWAIT | PCATCH, "nfsidl", 0);
 945             }
 946             if (error) {
 947                 nfs_asyncdaemon[myiod] = 0;
 948                 if (nmp)
 949                     nmp->nm_bufqiods--;
 950                 nfs_iodwant[myiod] = NULL;
 951                 nfs_iodmount[myiod] = NULL;
 952                 nfs_numasync--;
 953                 return (error);
 954             }
 955             while ((bp = nmp->nm_bufq.tqh_first) != NULL) {
 956                 /* Take one off the front of the list */
 957                 TAILQ_REMOVE(&nmp->nm_bufq, bp, b_freelist);
 958                 nmp->nm_bufqlen--;
 959                 if (nmp->nm_bufqwant && nmp->nm_bufqlen <= nfs_numasync) {
 960                     nmp->nm_bufqwant = FALSE;
 961                     wakeup(&nmp->nm_bufq);
 962                 }
 963                 if (bp->b_flags & B_READ)
 964                     (void) nfs_doio(bp, bp->b_rcred, (struct proc *)0);
 965                 else
 966                     (void) nfs_doio(bp, bp->b_wcred, (struct proc *)0);
 967                 /*
 968                  * If there are more than one iod on this mount, then defect
 969                  * so that the iods can be shared out fairly between the mounts
 970                  */
 971                 if (nfs_defect && nmp->nm_bufqiods > 1) {
 972                     NFS_DPF(ASYNCIO,
 973                             ("nfssvc_iod: iod %d defecting from mount %p\n",
 974                              myiod, nmp));
 975                     nfs_iodmount[myiod] = NULL;
 976                     nmp->nm_bufqiods--;
 977                     break;
 978                 }
 979             }
 980         }
 981 }
 982
 983
 984 /*
 985  * Get an authorization string for the uid by having the mount_nfs sitting
 986  * on this mount point porpous out of the kernel and do it.
 987  */
 988 int
 989 nfs_getauth(nmp, rep, cred, auth_str, auth_len, verf_str, verf_len, key)
 990         register struct nfsmount *nmp;
 991         struct nfsreq *rep;
 992         struct ucred *cred;
 993         char **auth_str;
 994         int *auth_len;
 995         char *verf_str;
 996         int *verf_len;
 997         NFSKERBKEY_T key;               /* return session key */
 998 {
 999         int error = 0;
1000
1001         while ((nmp->nm_state & NFSSTA_WAITAUTH) == 0) {
1002                 nmp->nm_state |= NFSSTA_WANTAUTH;
1003                 (void) tsleep((caddr_t)&nmp->nm_authtype, PSOCK,
1004                         "nfsauth1", 2 * hz);
1005                 error = nfs_sigintr(nmp, rep, rep->r_procp);
1006                 if (error) {
1007                         nmp->nm_state &= ~NFSSTA_WANTAUTH;
1008                         return (error);
1009                 }
1010         }
1011         nmp->nm_state &= ~(NFSSTA_WAITAUTH | NFSSTA_WANTAUTH);
1012         nmp->nm_authstr = *auth_str = (char *)malloc(RPCAUTH_MAXSIZ, M_TEMP, M_WAITOK);
1013         nmp->nm_authlen = RPCAUTH_MAXSIZ;
1014         nmp->nm_verfstr = verf_str;
1015         nmp->nm_verflen = *verf_len;
1016         nmp->nm_authuid = cred->cr_uid;
1017         wakeup((caddr_t)&nmp->nm_authstr);
1018
1019         /*
1020          * And wait for mount_nfs to do its stuff.
1021          */
1022         while ((nmp->nm_state & NFSSTA_HASAUTH) == 0 && error == 0) {
1023                 (void) tsleep((caddr_t)&nmp->nm_authlen, PSOCK,
1024                         "nfsauth2", 2 * hz);
1025                 error = nfs_sigintr(nmp, rep, rep->r_procp);
1026         }
1027         if (nmp->nm_state & NFSSTA_AUTHERR) {
1028                 nmp->nm_state &= ~NFSSTA_AUTHERR;
1029                 error = EAUTH;
1030         }
1031         if (error)
1032                 free((caddr_t)*auth_str, M_TEMP);
1033         else {
1034                 *auth_len = nmp->nm_authlen;
1035                 *verf_len = nmp->nm_verflen;
1036                 bcopy((caddr_t)nmp->nm_key, (caddr_t)key, sizeof (key));
1037         }
1038         nmp->nm_state &= ~NFSSTA_HASAUTH;
1039         nmp->nm_state |= NFSSTA_WAITAUTH;
1040         if (nmp->nm_state & NFSSTA_WANTAUTH) {
1041                 nmp->nm_state &= ~NFSSTA_WANTAUTH;
1042                 wakeup((caddr_t)&nmp->nm_authtype);
1043         }
1044         return (error);
1045 }
1046
1047 /*
1048  * Get a nickname authenticator and verifier.
1049  */
1050 int
1051 nfs_getnickauth(nmp, cred, auth_str, auth_len, verf_str, verf_len)
1052         struct nfsmount *nmp;
1053         struct ucred *cred;
1054         char **auth_str;
1055         int *auth_len;
1056         char *verf_str;
1057         int verf_len;
1058 {
1059         register struct nfsuid *nuidp;
1060         register u_int32_t *nickp, *verfp;
1061         struct timeval ktvin, ktvout;
1062
1063 #ifdef DIAGNOSTIC
1064         if (verf_len < (4 * NFSX_UNSIGNED))
1065                 panic("nfs_getnickauth verf too small");
1066 #endif
1067         for (nuidp = NMUIDHASH(nmp, cred->cr_uid)->lh_first;
1068             nuidp != 0; nuidp = nuidp->nu_hash.le_next) {
1069                 if (nuidp->nu_cr.cr_uid == cred->cr_uid)
1070                         break;
1071         }
1072         if (!nuidp || nuidp->nu_expire < time_second)
1073                 return (EACCES);
1074
1075         /*
1076          * Move to the end of the lru list (end of lru == most recently used).
1077          */
1078         TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru);
1079         TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, nu_lru);
1080
1081         nickp = (u_int32_t *)malloc(2 * NFSX_UNSIGNED, M_TEMP, M_WAITOK);
1082         *nickp++ = txdr_unsigned(RPCAKN_NICKNAME);
1083         *nickp = txdr_unsigned(nuidp->nu_nickname);
1084         *auth_str = (char *)nickp;
1085         *auth_len = 2 * NFSX_UNSIGNED;
1086
1087         /*
1088          * Now we must encrypt the verifier and package it up.
1089          */
1090         verfp = (u_int32_t *)verf_str;
1091         *verfp++ = txdr_unsigned(RPCAKN_NICKNAME);
1092         if (time_second > nuidp->nu_timestamp.tv_sec ||
1093             (time_second == nuidp->nu_timestamp.tv_sec &&
1094              time_second > nuidp->nu_timestamp.tv_usec))
1095                 getmicrotime(&nuidp->nu_timestamp);
1096         else
1097                 nuidp->nu_timestamp.tv_usec++;
1098         ktvin.tv_sec = txdr_unsigned(nuidp->nu_timestamp.tv_sec);
1099         ktvin.tv_usec = txdr_unsigned(nuidp->nu_timestamp.tv_usec);
1100
1101         /*
1102          * Now encrypt the timestamp verifier in ecb mode using the session
1103          * key.
1104          */
1105 #ifdef NFSKERB
1106         XXX
1107 #endif
1108
1109         *verfp++ = ktvout.tv_sec;
1110         *verfp++ = ktvout.tv_usec;
1111         *verfp = 0;
1112         return (0);
1113 }
1114
1115 /*
1116  * Save the current nickname in a hash list entry on the mount point.
1117  */
1118 int
1119 nfs_savenickauth(nmp, cred, len, key, mdp, dposp, mrep)
1120         register struct nfsmount *nmp;
1121         struct ucred *cred;
1122         int len;
1123         NFSKERBKEY_T key;
1124         struct mbuf **mdp;
1125         char **dposp;
1126         struct mbuf *mrep;
1127 {
1128         register struct nfsuid *nuidp;
1129         register u_int32_t *tl;
1130         register int32_t t1;
1131         struct mbuf *md = *mdp;
1132         struct timeval ktvin, ktvout;
1133         u_int32_t nick;
1134         char *dpos = *dposp, *cp2;
1135         int deltasec, error = 0;
1136
1137         if (len == (3 * NFSX_UNSIGNED)) {
1138                 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
1139                 ktvin.tv_sec = *tl++;
1140                 ktvin.tv_usec = *tl++;
1141                 nick = fxdr_unsigned(u_int32_t, *tl);
1142
1143                 /*
1144                  * Decrypt the timestamp in ecb mode.
1145                  */
1146 #ifdef NFSKERB
1147                 XXX
1148 #endif
1149                 ktvout.tv_sec = fxdr_unsigned(long, ktvout.tv_sec);
1150                 ktvout.tv_usec = fxdr_unsigned(long, ktvout.tv_usec);
1151                 deltasec = time_second - ktvout.tv_sec;
1152                 if (deltasec < 0)
1153                         deltasec = -deltasec;
1154                 /*
1155                  * If ok, add it to the hash list for the mount point.
1156                  */
1157                 if (deltasec <= NFS_KERBCLOCKSKEW) {
1158                         if (nmp->nm_numuids < nuidhash_max) {
1159                                 nmp->nm_numuids++;
1160                                 nuidp = (struct nfsuid *)
1161                                    malloc(sizeof (struct nfsuid), M_NFSUID,
1162                                         M_WAITOK);
1163                         } else {
1164                                 nuidp = nmp->nm_uidlruhead.tqh_first;
1165                                 LIST_REMOVE(nuidp, nu_hash);
1166                                 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp,
1167                                         nu_lru);
1168                         }
1169                         nuidp->nu_flag = 0;
1170                         nuidp->nu_cr.cr_uid = cred->cr_uid;
1171                         nuidp->nu_expire = time_second + NFS_KERBTTL;
1172                         nuidp->nu_timestamp = ktvout;
1173                         nuidp->nu_nickname = nick;
1174                         bcopy(key, nuidp->nu_key, sizeof (key));
1175                         TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp,
1176                                 nu_lru);
1177                         LIST_INSERT_HEAD(NMUIDHASH(nmp, cred->cr_uid),
1178                                 nuidp, nu_hash);
1179                 }
1180         } else
1181                 nfsm_adv(nfsm_rndup(len));
1182 nfsmout:
1183         *mdp = md;
1184         *dposp = dpos;
1185         return (error);
1186 }