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 1.9 2003/08/20 09:56:33 rob 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 "xdr_subs.h"
  64 #include "rpcv2.h"
  65 #include "nfsproto.h"
  66 #include "nfs.h"
  67 #include "nfsm_subs.h"
  68 #include "nfsrvcache.h"
  69 #include "nfsmount.h"
  70 #include "nfsnode.h"
  71 #include "nqnfs.h"
  72 #include "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]) (struct nfsrv_descript *nd,
  78                                             struct nfssvc_sock *slp,
  79                                             struct thread *td,
  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 (struct nfssvc_sock *slp);
  92 #endif
  93 static int      nfssvc_iod (struct thread *);
  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 (int sotype, struct nfsrv_descript *nd,
 109                              int cacherep);
 110 static int      nfssvc_addsock (struct file *, struct sockaddr *,
 111                                     struct thread *);
 112 static int      nfssvc_nfsd (struct nfsd_srvargs *,caddr_t,struct thread *);
 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 thread *td = curthread;
 150
 151         /*
 152          * Must be super user
 153          */
 154         error = suser(td);
 155         if(error)
 156                 return (error);
 157         KKASSERT(td->td_proc);  /* for ucred and p_fd */
 158         while (nfssvc_sockhead_flag & SLP_INIT) {
 159                  nfssvc_sockhead_flag |= SLP_WANTINIT;
 160                 (void) tsleep((caddr_t)&nfssvc_sockhead, 0, "nfsd init", 0);
 161         }
 162         if (uap->flag & NFSSVC_BIOD)
 163                 error = nfssvc_iod(td);
 164 #ifdef NFS_NOSERVER
 165         else
 166                 error = ENXIO;
 167 #else /* !NFS_NOSERVER */
 168         else if (uap->flag & NFSSVC_MNTD) {
 169                 error = copyin(uap->argp, (caddr_t)&ncd, sizeof (ncd));
 170                 if (error)
 171                         return (error);
 172                 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
 173                         ncd.ncd_dirp, td);
 174                 error = namei(&nd);
 175                 if (error)
 176                         return (error);
 177                 NDFREE(&nd, NDF_ONLY_PNBUF);
 178                 if ((nd.ni_vp->v_flag & VROOT) == 0)
 179                         error = EINVAL;
 180                 nmp = VFSTONFS(nd.ni_vp->v_mount);
 181                 vput(nd.ni_vp);
 182                 if (error)
 183                         return (error);
 184                 if ((nmp->nm_state & NFSSTA_MNTD) &&
 185                         (uap->flag & NFSSVC_GOTAUTH) == 0)
 186                         return (0);
 187                 nmp->nm_state |= NFSSTA_MNTD;
 188                 error = nqnfs_clientd(nmp, td->td_proc->p_ucred, &ncd, uap->flag,
 189                         uap->argp, td);
 190         } else if (uap->flag & NFSSVC_ADDSOCK) {
 191                 error = copyin(uap->argp, (caddr_t)&nfsdarg, sizeof(nfsdarg));
 192                 if (error)
 193                         return (error);
 194                 error = holdsock(td->td_proc->p_fd, nfsdarg.sock, &fp);
 195                 if (error)
 196                         return (error);
 197                 /*
 198                  * Get the client address for connected sockets.
 199                  */
 200                 if (nfsdarg.name == NULL || nfsdarg.namelen == 0)
 201                         nam = (struct sockaddr *)0;
 202                 else {
 203                         error = getsockaddr(&nam, nfsdarg.name,
 204                                             nfsdarg.namelen);
 205                         if (error) {
 206                                 fdrop(fp, td);
 207                                 return (error);
 208                         }
 209                 }
 210                 error = nfssvc_addsock(fp, nam, td);
 211                 fdrop(fp, td);
 212         } else {
 213                 error = copyin(uap->argp, (caddr_t)nsd, sizeof (*nsd));
 214                 if (error)
 215                         return (error);
 216                 if ((uap->flag & NFSSVC_AUTHIN) &&
 217                     ((nfsd = nsd->nsd_nfsd)) != NULL &&
 218                     (nfsd->nfsd_slp->ns_flag & SLP_VALID)) {
 219                         slp = nfsd->nfsd_slp;
 220
 221                         /*
 222                          * First check to see if another nfsd has already
 223                          * added this credential.
 224                          */
 225                         for (nuidp = NUIDHASH(slp,nsd->nsd_cr.cr_uid)->lh_first;
 226                             nuidp != 0; nuidp = nuidp->nu_hash.le_next) {
 227                                 if (nuidp->nu_cr.cr_uid == nsd->nsd_cr.cr_uid &&
 228                                     (!nfsd->nfsd_nd->nd_nam2 ||
 229                                      netaddr_match(NU_NETFAM(nuidp),
 230                                      &nuidp->nu_haddr, nfsd->nfsd_nd->nd_nam2)))
 231                                         break;
 232                         }
 233                         if (nuidp) {
 234                             nfsrv_setcred(&nuidp->nu_cr,&nfsd->nfsd_nd->nd_cr);
 235                             nfsd->nfsd_nd->nd_flag |= ND_KERBFULL;
 236                         } else {
 237                             /*
 238                              * Nope, so we will.
 239                              */
 240                             if (slp->ns_numuids < nuidhash_max) {
 241                                 slp->ns_numuids++;
 242                                 nuidp = (struct nfsuid *)
 243                                    malloc(sizeof (struct nfsuid), M_NFSUID,
 244                                         M_WAITOK);
 245                             } else
 246                                 nuidp = (struct nfsuid *)0;
 247                             if ((slp->ns_flag & SLP_VALID) == 0) {
 248                                 if (nuidp)
 249                                     free((caddr_t)nuidp, M_NFSUID);
 250                             } else {
 251                                 if (nuidp == (struct nfsuid *)0) {
 252                                     nuidp = slp->ns_uidlruhead.tqh_first;
 253                                     LIST_REMOVE(nuidp, nu_hash);
 254                                     TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp,
 255                                         nu_lru);
 256                                     if (nuidp->nu_flag & NU_NAM)
 257                                         FREE(nuidp->nu_nam, M_SONAME);
 258                                 }
 259                                 nuidp->nu_flag = 0;
 260                                 nuidp->nu_cr = nsd->nsd_cr;
 261                                 if (nuidp->nu_cr.cr_ngroups > NGROUPS)
 262                                     nuidp->nu_cr.cr_ngroups = NGROUPS;
 263                                 nuidp->nu_cr.cr_ref = 1;
 264                                 nuidp->nu_timestamp = nsd->nsd_timestamp;
 265                                 nuidp->nu_expire = time_second + nsd->nsd_ttl;
 266                                 /*
 267                                  * and save the session key in nu_key.
 268                                  */
 269                                 bcopy(nsd->nsd_key, nuidp->nu_key,
 270                                     sizeof (nsd->nsd_key));
 271                                 if (nfsd->nfsd_nd->nd_nam2) {
 272                                     struct sockaddr_in *saddr;
 273
 274                                     saddr = (struct sockaddr_in *)
 275                                             nfsd->nfsd_nd->nd_nam2;
 276                                     switch (saddr->sin_family) {
 277                                     case AF_INET:
 278                                         nuidp->nu_flag |= NU_INETADDR;
 279                                         nuidp->nu_inetaddr =
 280                                              saddr->sin_addr.s_addr;
 281                                         break;
 282                                     case AF_ISO:
 283                                     default:
 284                                         nuidp->nu_flag |= NU_NAM;
 285                                         nuidp->nu_nam =
 286                                                 dup_sockaddr(nfsd->nfsd_nd->
 287                                                              nd_nam2, 1);
 288                                         break;
 289                                     };
 290                                 }
 291                                 TAILQ_INSERT_TAIL(&slp->ns_uidlruhead, nuidp,
 292                                         nu_lru);
 293                                 LIST_INSERT_HEAD(NUIDHASH(slp, nsd->nsd_uid),
 294                                         nuidp, nu_hash);
 295                                 nfsrv_setcred(&nuidp->nu_cr,
 296                                     &nfsd->nfsd_nd->nd_cr);
 297                                 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL;
 298                             }
 299                         }
 300                 }
 301                 if ((uap->flag & NFSSVC_AUTHINFAIL) && (nfsd = nsd->nsd_nfsd))
 302                         nfsd->nfsd_flag |= NFSD_AUTHFAIL;
 303                 error = nfssvc_nfsd(nsd, uap->argp, td);
 304         }
 305 #endif /* NFS_NOSERVER */
 306         if (error == EINTR || error == ERESTART)
 307                 error = 0;
 308         return (error);
 309 }
 310
 311 #ifndef NFS_NOSERVER
 312 /*
 313  * Adds a socket to the list for servicing by nfsds.
 314  */
 315 static int
 316 nfssvc_addsock(struct file *fp, struct sockaddr *mynam, struct thread *td)
 317 {
 318         int siz;
 319         struct nfssvc_sock *slp;
 320         struct socket *so;
 321         int error, s;
 322
 323         so = (struct socket *)fp->f_data;
 324 #if 0
 325         tslp = (struct nfssvc_sock *)0;
 326         /*
 327          * Add it to the list, as required.
 328          */
 329         if (so->so_proto->pr_protocol == IPPROTO_UDP) {
 330                 tslp = nfs_udpsock;
 331                 if (tslp->ns_flag & SLP_VALID) {
 332                         if (mynam != NULL)
 333                                 FREE(mynam, M_SONAME);
 334                         return (EPERM);
 335                 }
 336         }
 337 #endif
 338         if (so->so_type == SOCK_STREAM)
 339                 siz = NFS_MAXPACKET + sizeof (u_long);
 340         else
 341                 siz = NFS_MAXPACKET;
 342         error = soreserve(so, siz, siz);
 343         if (error) {
 344                 if (mynam != NULL)
 345                         FREE(mynam, M_SONAME);
 346                 return (error);
 347         }
 348
 349         /*
 350          * Set protocol specific options { for now TCP only } and
 351          * reserve some space. For datagram sockets, this can get called
 352          * repeatedly for the same socket, but that isn't harmful.
 353          */
 354         if (so->so_type == SOCK_STREAM) {
 355                 struct sockopt sopt;
 356                 int val;
 357
 358                 bzero(&sopt, sizeof sopt);
 359                 sopt.sopt_level = SOL_SOCKET;
 360                 sopt.sopt_name = SO_KEEPALIVE;
 361                 sopt.sopt_val = &val;
 362                 sopt.sopt_valsize = sizeof val;
 363                 val = 1;
 364                 sosetopt(so, &sopt);
 365         }
 366         if (so->so_proto->pr_domain->dom_family == AF_INET &&
 367             so->so_proto->pr_protocol == IPPROTO_TCP) {
 368                 struct sockopt sopt;
 369                 int val;
 370
 371                 bzero(&sopt, sizeof sopt);
 372                 sopt.sopt_level = IPPROTO_TCP;
 373                 sopt.sopt_name = TCP_NODELAY;
 374                 sopt.sopt_val = &val;
 375                 sopt.sopt_valsize = sizeof val;
 376                 val = 1;
 377                 sosetopt(so, &sopt);
 378         }
 379         so->so_rcv.sb_flags &= ~SB_NOINTR;
 380         so->so_rcv.sb_timeo = 0;
 381         so->so_snd.sb_flags &= ~SB_NOINTR;
 382         so->so_snd.sb_timeo = 0;
 383
 384         slp = (struct nfssvc_sock *)
 385                 malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK);
 386         bzero((caddr_t)slp, sizeof (struct nfssvc_sock));
 387         STAILQ_INIT(&slp->ns_rec);
 388         TAILQ_INIT(&slp->ns_uidlruhead);
 389         TAILQ_INSERT_TAIL(&nfssvc_sockhead, slp, ns_chain);
 390
 391         slp->ns_so = so;
 392         slp->ns_nam = mynam;
 393         fp->f_count++;
 394         slp->ns_fp = fp;
 395         s = splnet();
 396         so->so_upcallarg = (caddr_t)slp;
 397         so->so_upcall = nfsrv_rcv;
 398         so->so_rcv.sb_flags |= SB_UPCALL;
 399         slp->ns_flag = (SLP_VALID | SLP_NEEDQ);
 400         nfsrv_wakenfsd(slp);
 401         splx(s);
 402         return (0);
 403 }
 404
 405 /*
 406  * Called by nfssvc() for nfsds. Just loops around servicing rpc requests
 407  * until it is killed by a signal.
 408  */
 409 static int
 410 nfssvc_nfsd(struct nfsd_srvargs *nsd, caddr_t argp, struct thread *td)
 411 {
 412         int siz;
 413         struct nfssvc_sock *slp;
 414         struct nfsd *nfsd = nsd->nsd_nfsd;
 415         struct nfsrv_descript *nd = NULL;
 416         struct mbuf *m, *mreq;
 417         int error = 0, cacherep, s, sotype, writes_todo;
 418         int procrastinate;
 419         u_quad_t cur_usec;
 420
 421 #ifndef nolint
 422         cacherep = RC_DOIT;
 423         writes_todo = 0;
 424 #endif
 425         if (nfsd == (struct nfsd *)0) {
 426                 nsd->nsd_nfsd = nfsd = (struct nfsd *)
 427                         malloc(sizeof (struct nfsd), M_NFSD, M_WAITOK);
 428                 bzero((caddr_t)nfsd, sizeof (struct nfsd));
 429                 s = splnet();
 430                 nfsd->nfsd_td = td;
 431                 TAILQ_INSERT_TAIL(&nfsd_head, nfsd, nfsd_chain);
 432                 nfs_numnfsd++;
 433         } else
 434                 s = splnet();
 435
 436         /*
 437          * Loop getting rpc requests until SIGKILL.
 438          */
 439         for (;;) {
 440                 if ((nfsd->nfsd_flag & NFSD_REQINPROG) == 0) {
 441                         while (nfsd->nfsd_slp == (struct nfssvc_sock *)0 &&
 442                             (nfsd_head_flag & NFSD_CHECKSLP) == 0) {
 443                                 nfsd->nfsd_flag |= NFSD_WAITING;
 444                                 nfsd_waiting++;
 445                                 error = tsleep((caddr_t)nfsd, PCATCH, "nfsd", 0);
 446                                 nfsd_waiting--;
 447                                 if (error)
 448                                         goto done;
 449                         }
 450                         if (nfsd->nfsd_slp == (struct nfssvc_sock *)0 &&
 451                             (nfsd_head_flag & NFSD_CHECKSLP) != 0) {
 452                                 for (slp = nfssvc_sockhead.tqh_first; slp != 0;
 453                                     slp = slp->ns_chain.tqe_next) {
 454                                     if ((slp->ns_flag & (SLP_VALID | SLP_DOREC))
 455                                         == (SLP_VALID | SLP_DOREC)) {
 456                                             slp->ns_flag &= ~SLP_DOREC;
 457                                             slp->ns_sref++;
 458                                             nfsd->nfsd_slp = slp;
 459                                             break;
 460                                     }
 461                                 }
 462                                 if (slp == 0)
 463                                         nfsd_head_flag &= ~NFSD_CHECKSLP;
 464                         }
 465                         if ((slp = nfsd->nfsd_slp) == (struct nfssvc_sock *)0)
 466                                 continue;
 467                         if (slp->ns_flag & SLP_VALID) {
 468                                 if (slp->ns_flag & SLP_DISCONN)
 469                                         nfsrv_zapsock(slp);
 470                                 else if (slp->ns_flag & SLP_NEEDQ) {
 471                                         slp->ns_flag &= ~SLP_NEEDQ;
 472                                         (void) nfs_slplock(slp, 1);
 473                                         nfsrv_rcv(slp->ns_so, (caddr_t)slp,
 474                                                 M_WAIT);
 475                                         nfs_slpunlock(slp);
 476                                 }
 477                                 error = nfsrv_dorec(slp, nfsd, &nd);
 478                                 cur_usec = nfs_curusec();
 479                                 if (error && slp->ns_tq.lh_first &&
 480                                     slp->ns_tq.lh_first->nd_time <= cur_usec) {
 481                                         error = 0;
 482                                         cacherep = RC_DOIT;
 483                                         writes_todo = 1;
 484                                 } else
 485                                         writes_todo = 0;
 486                                 nfsd->nfsd_flag |= NFSD_REQINPROG;
 487                         }
 488                 } else {
 489                         error = 0;
 490                         slp = nfsd->nfsd_slp;
 491                 }
 492                 if (error || (slp->ns_flag & SLP_VALID) == 0) {
 493                         if (nd) {
 494                                 free((caddr_t)nd, M_NFSRVDESC);
 495                                 nd = NULL;
 496                         }
 497                         nfsd->nfsd_slp = (struct nfssvc_sock *)0;
 498                         nfsd->nfsd_flag &= ~NFSD_REQINPROG;
 499                         nfsrv_slpderef(slp);
 500                         continue;
 501                 }
 502                 splx(s);
 503                 sotype = slp->ns_so->so_type;
 504                 if (nd) {
 505                     getmicrotime(&nd->nd_starttime);
 506                     if (nd->nd_nam2)
 507                         nd->nd_nam = nd->nd_nam2;
 508                     else
 509                         nd->nd_nam = slp->ns_nam;
 510
 511                     /*
 512                      * Check to see if authorization is needed.
 513                      */
 514                     if (nfsd->nfsd_flag & NFSD_NEEDAUTH) {
 515                         nfsd->nfsd_flag &= ~NFSD_NEEDAUTH;
 516                         nsd->nsd_haddr =
 517                                 ((struct sockaddr_in *)
 518                                  nd->nd_nam)->sin_addr.s_addr;
 519                         nsd->nsd_authlen = nfsd->nfsd_authlen;
 520                         nsd->nsd_verflen = nfsd->nfsd_verflen;
 521                         if (!copyout(nfsd->nfsd_authstr,nsd->nsd_authstr,
 522                                 nfsd->nfsd_authlen) &&
 523                             !copyout(nfsd->nfsd_verfstr, nsd->nsd_verfstr,
 524                                 nfsd->nfsd_verflen) &&
 525                             !copyout((caddr_t)nsd, argp, sizeof (*nsd)))
 526                             return (ENEEDAUTH);
 527                         cacherep = RC_DROPIT;
 528                     } else
 529                         cacherep = nfsrv_getcache(nd, slp, &mreq);
 530
 531                     /*
 532                      * Check for just starting up for NQNFS and send
 533                      * fake "try again later" replies to the NQNFS clients.
 534                      */
 535                     if (notstarted && nqnfsstarttime <= time_second) {
 536                         if (modify_flag) {
 537                                 nqnfsstarttime = time_second + nqsrv_writeslack;
 538                                 modify_flag = 0;
 539                         } else
 540                                 notstarted = 0;
 541                     }
 542                     if (notstarted) {
 543                         if ((nd->nd_flag & ND_NQNFS) == 0)
 544                                 cacherep = RC_DROPIT;
 545                         else if (nd->nd_procnum != NFSPROC_WRITE) {
 546                                 nd->nd_procnum = NFSPROC_NOOP;
 547                                 nd->nd_repstat = NQNFS_TRYLATER;
 548                                 cacherep = RC_DOIT;
 549                         } else
 550                                 modify_flag = 1;
 551                     } else if (nfsd->nfsd_flag & NFSD_AUTHFAIL) {
 552                         nfsd->nfsd_flag &= ~NFSD_AUTHFAIL;
 553                         nd->nd_procnum = NFSPROC_NOOP;
 554                         nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
 555                         cacherep = RC_DOIT;
 556                     } else if (nfs_privport) {
 557                         /* Check if source port is privileged */
 558                         u_short port;
 559                         struct sockaddr *nam = nd->nd_nam;
 560                         struct sockaddr_in *sin;
 561
 562                         sin = (struct sockaddr_in *)nam;
 563                         port = ntohs(sin->sin_port);
 564                         if (port >= IPPORT_RESERVED &&
 565                             nd->nd_procnum != NFSPROC_NULL) {
 566                             nd->nd_procnum = NFSPROC_NOOP;
 567                             nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
 568                             cacherep = RC_DOIT;
 569                             printf("NFS request from unprivileged port (%s:%d)\n",
 570                                    inet_ntoa(sin->sin_addr), port);
 571                         }
 572                     }
 573
 574                 }
 575
 576                 /*
 577                  * Loop to get all the write rpc relies that have been
 578                  * gathered together.
 579                  */
 580                 do {
 581                     switch (cacherep) {
 582                     case RC_DOIT:
 583                         if (nd && (nd->nd_flag & ND_NFSV3))
 584                             procrastinate = nfsrvw_procrastinate_v3;
 585                         else
 586                             procrastinate = nfsrvw_procrastinate;
 587                         if (writes_todo || (nd->nd_procnum == NFSPROC_WRITE &&
 588                             procrastinate > 0 && !notstarted))
 589                             error = nfsrv_writegather(&nd, slp,
 590                                 nfsd->nfsd_td, &mreq);
 591                         else
 592                             error = (*(nfsrv3_procs[nd->nd_procnum]))(nd,
 593                                 slp, nfsd->nfsd_td, &mreq);
 594                         if (mreq == NULL)
 595                                 break;
 596                         if (error != 0 && error != NFSERR_RETVOID) {
 597                                 if (nd->nd_procnum != NQNFSPROC_VACATED)
 598                                         nfsstats.srv_errs++;
 599                                 nfsrv_updatecache(nd, FALSE, mreq);
 600                                 if (nd->nd_nam2)
 601                                         FREE(nd->nd_nam2, M_SONAME);
 602                                 break;
 603                         }
 604                         nfsstats.srvrpccnt[nd->nd_procnum]++;
 605                         nfsrv_updatecache(nd, TRUE, mreq);
 606                         nd->nd_mrep = (struct mbuf *)0;
 607                     case RC_REPLY:
 608                         m = mreq;
 609                         siz = 0;
 610                         while (m) {
 611                                 siz += m->m_len;
 612                                 m = m->m_next;
 613                         }
 614                         if (siz <= 0 || siz > NFS_MAXPACKET) {
 615                                 printf("mbuf siz=%d\n",siz);
 616                                 panic("Bad nfs svc reply");
 617                         }
 618                         m = mreq;
 619                         m->m_pkthdr.len = siz;
 620                         m->m_pkthdr.rcvif = (struct ifnet *)0;
 621                         /*
 622                          * For stream protocols, prepend a Sun RPC
 623                          * Record Mark.
 624                          */
 625                         if (sotype == SOCK_STREAM) {
 626                                 M_PREPEND(m, NFSX_UNSIGNED, M_WAIT);
 627                                 *mtod(m, u_int32_t *) = htonl(0x80000000 | siz);
 628                         }
 629                         if (slp->ns_so->so_proto->pr_flags & PR_CONNREQUIRED)
 630                                 (void) nfs_slplock(slp, 1);
 631                         if (slp->ns_flag & SLP_VALID)
 632                             error = nfs_send(slp->ns_so, nd->nd_nam2, m, NULL);
 633                         else {
 634                             error = EPIPE;
 635                             m_freem(m);
 636                         }
 637                         if (nfsrtton)
 638                                 nfsd_rt(sotype, nd, cacherep);
 639                         if (nd->nd_nam2)
 640                                 FREE(nd->nd_nam2, M_SONAME);
 641                         if (nd->nd_mrep)
 642                                 m_freem(nd->nd_mrep);
 643                         if (error == EPIPE)
 644                                 nfsrv_zapsock(slp);
 645                         if (slp->ns_so->so_proto->pr_flags & PR_CONNREQUIRED)
 646                                 nfs_slpunlock(slp);
 647                         if (error == EINTR || error == ERESTART) {
 648                                 free((caddr_t)nd, M_NFSRVDESC);
 649                                 nfsrv_slpderef(slp);
 650                                 s = splnet();
 651                                 goto done;
 652                         }
 653                         break;
 654                     case RC_DROPIT:
 655                         if (nfsrtton)
 656                                 nfsd_rt(sotype, nd, cacherep);
 657                         m_freem(nd->nd_mrep);
 658                         if (nd->nd_nam2)
 659                                 FREE(nd->nd_nam2, M_SONAME);
 660                         break;
 661                     };
 662                     if (nd) {
 663                         FREE((caddr_t)nd, M_NFSRVDESC);
 664                         nd = NULL;
 665                     }
 666
 667                     /*
 668                      * Check to see if there are outstanding writes that
 669                      * need to be serviced.
 670                      */
 671                     cur_usec = nfs_curusec();
 672                     s = splsoftclock();
 673                     if (slp->ns_tq.lh_first &&
 674                         slp->ns_tq.lh_first->nd_time <= cur_usec) {
 675                         cacherep = RC_DOIT;
 676                         writes_todo = 1;
 677                     } else
 678                         writes_todo = 0;
 679                     splx(s);
 680                 } while (writes_todo);
 681                 s = splnet();
 682                 if (nfsrv_dorec(slp, nfsd, &nd)) {
 683                         nfsd->nfsd_flag &= ~NFSD_REQINPROG;
 684                         nfsd->nfsd_slp = NULL;
 685                         nfsrv_slpderef(slp);
 686                 }
 687         }
 688 done:
 689         TAILQ_REMOVE(&nfsd_head, nfsd, nfsd_chain);
 690         splx(s);
 691         free((caddr_t)nfsd, M_NFSD);
 692         nsd->nsd_nfsd = (struct nfsd *)0;
 693         if (--nfs_numnfsd == 0)
 694                 nfsrv_init(TRUE);       /* Reinitialize everything */
 695         return (error);
 696 }
 697
 698 /*
 699  * Shut down a socket associated with an nfssvc_sock structure.
 700  * Should be called with the send lock set, if required.
 701  * The trick here is to increment the sref at the start, so that the nfsds
 702  * will stop using it and clear ns_flag at the end so that it will not be
 703  * reassigned during cleanup.
 704  */
 705 static void
 706 nfsrv_zapsock(slp)
 707         struct nfssvc_sock *slp;
 708 {
 709         struct nfsuid *nuidp, *nnuidp;
 710         struct nfsrv_descript *nwp, *nnwp;
 711         struct socket *so;
 712         struct file *fp;
 713         struct nfsrv_rec *rec;
 714         int s;
 715
 716         slp->ns_flag &= ~SLP_ALLFLAGS;
 717         fp = slp->ns_fp;
 718         if (fp) {
 719                 slp->ns_fp = (struct file *)0;
 720                 so = slp->ns_so;
 721                 so->so_rcv.sb_flags &= ~SB_UPCALL;
 722                 so->so_upcall = NULL;
 723                 so->so_upcallarg = NULL;
 724                 soshutdown(so, 2);
 725                 closef(fp, NULL);
 726                 if (slp->ns_nam)
 727                         FREE(slp->ns_nam, M_SONAME);
 728                 m_freem(slp->ns_raw);
 729                 while ((rec = STAILQ_FIRST(&slp->ns_rec)) != NULL) {
 730                         STAILQ_REMOVE_HEAD(&slp->ns_rec, nr_link);
 731                         if (rec->nr_address)
 732                                 FREE(rec->nr_address, M_SONAME);
 733                         m_freem(rec->nr_packet);
 734                         free(rec, M_NFSRVDESC);
 735                 }
 736                 for (nuidp = slp->ns_uidlruhead.tqh_first; nuidp != 0;
 737                     nuidp = nnuidp) {
 738                         nnuidp = nuidp->nu_lru.tqe_next;
 739                         LIST_REMOVE(nuidp, nu_hash);
 740                         TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, nu_lru);
 741                         if (nuidp->nu_flag & NU_NAM)
 742                                 FREE(nuidp->nu_nam, M_SONAME);
 743                         free((caddr_t)nuidp, M_NFSUID);
 744                 }
 745                 s = splsoftclock();
 746                 for (nwp = slp->ns_tq.lh_first; nwp; nwp = nnwp) {
 747                         nnwp = nwp->nd_tq.le_next;
 748                         LIST_REMOVE(nwp, nd_tq);
 749                         free((caddr_t)nwp, M_NFSRVDESC);
 750                 }
 751                 LIST_INIT(&slp->ns_tq);
 752                 splx(s);
 753         }
 754 }
 755
 756 /*
 757  * Derefence a server socket structure. If it has no more references and
 758  * is no longer valid, you can throw it away.
 759  */
 760 void
 761 nfsrv_slpderef(slp)
 762         struct nfssvc_sock *slp;
 763 {
 764         if (--(slp->ns_sref) == 0 && (slp->ns_flag & SLP_VALID) == 0) {
 765                 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain);
 766                 free((caddr_t)slp, M_NFSSVC);
 767         }
 768 }
 769
 770 /*
 771  * Lock a socket against others.
 772  */
 773 int
 774 nfs_slplock(slp, wait)
 775         struct nfssvc_sock *slp;
 776         int wait;
 777 {
 778         int *statep = &slp->ns_solock;
 779
 780         if (!wait && (*statep & NFSSTA_SNDLOCK))
 781                 return(0);      /* already locked, fail */
 782         while (*statep & NFSSTA_SNDLOCK) {
 783                 *statep |= NFSSTA_WANTSND;
 784                 (void) tsleep((caddr_t)statep, 0, "nfsslplck", 0);
 785         }
 786         *statep |= NFSSTA_SNDLOCK;
 787         return (1);
 788 }
 789
 790 /*
 791  * Unlock the stream socket for others.
 792  */
 793 void
 794 nfs_slpunlock(slp)
 795         struct nfssvc_sock *slp;
 796 {
 797         int *statep = &slp->ns_solock;
 798
 799         if ((*statep & NFSSTA_SNDLOCK) == 0)
 800                 panic("nfs slpunlock");
 801         *statep &= ~NFSSTA_SNDLOCK;
 802         if (*statep & NFSSTA_WANTSND) {
 803                 *statep &= ~NFSSTA_WANTSND;
 804                 wakeup((caddr_t)statep);
 805         }
 806 }
 807
 808 /*
 809  * Initialize the data structures for the server.
 810  * Handshake with any new nfsds starting up to avoid any chance of
 811  * corruption.
 812  */
 813 void
 814 nfsrv_init(terminating)
 815         int terminating;
 816 {
 817         struct nfssvc_sock *slp, *nslp;
 818
 819         if (nfssvc_sockhead_flag & SLP_INIT)
 820                 panic("nfsd init");
 821         nfssvc_sockhead_flag |= SLP_INIT;
 822         if (terminating) {
 823                 for (slp = nfssvc_sockhead.tqh_first; slp != 0; slp = nslp) {
 824                         nslp = slp->ns_chain.tqe_next;
 825                         if (slp->ns_flag & SLP_VALID)
 826                                 nfsrv_zapsock(slp);
 827                         TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain);
 828                         free((caddr_t)slp, M_NFSSVC);
 829                 }
 830                 nfsrv_cleancache();     /* And clear out server cache */
 831         } else
 832                 nfs_pub.np_valid = 0;
 833
 834         TAILQ_INIT(&nfssvc_sockhead);
 835         nfssvc_sockhead_flag &= ~SLP_INIT;
 836         if (nfssvc_sockhead_flag & SLP_WANTINIT) {
 837                 nfssvc_sockhead_flag &= ~SLP_WANTINIT;
 838                 wakeup((caddr_t)&nfssvc_sockhead);
 839         }
 840
 841         TAILQ_INIT(&nfsd_head);
 842         nfsd_head_flag &= ~NFSD_CHECKSLP;
 843
 844 #if 0
 845         nfs_udpsock = (struct nfssvc_sock *)
 846             malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK);
 847         bzero((caddr_t)nfs_udpsock, sizeof (struct nfssvc_sock));
 848         STAILQ_INIT(&nfs_udpsock->ns_rec);
 849         TAILQ_INIT(&nfs_udpsock->ns_uidlruhead);
 850         TAILQ_INSERT_HEAD(&nfssvc_sockhead, nfs_udpsock, ns_chain);
 851
 852         nfs_cltpsock = (struct nfssvc_sock *)
 853             malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK);
 854         bzero((caddr_t)nfs_cltpsock, sizeof (struct nfssvc_sock));
 855         STAILQ_INIT(&nfs_cltpsock->ns_rec);
 856         TAILQ_INIT(&nfs_cltpsock->ns_uidlruhead);
 857         TAILQ_INSERT_TAIL(&nfssvc_sockhead, nfs_cltpsock, ns_chain);
 858 #endif
 859 }
 860
 861 /*
 862  * Add entries to the server monitor log.
 863  */
 864 static void
 865 nfsd_rt(sotype, nd, cacherep)
 866         int sotype;
 867         struct nfsrv_descript *nd;
 868         int cacherep;
 869 {
 870         struct drt *rt;
 871
 872         rt = &nfsdrt.drt[nfsdrt.pos];
 873         if (cacherep == RC_DOIT)
 874                 rt->flag = 0;
 875         else if (cacherep == RC_REPLY)
 876                 rt->flag = DRT_CACHEREPLY;
 877         else
 878                 rt->flag = DRT_CACHEDROP;
 879         if (sotype == SOCK_STREAM)
 880                 rt->flag |= DRT_TCP;
 881         if (nd->nd_flag & ND_NQNFS)
 882                 rt->flag |= DRT_NQNFS;
 883         else if (nd->nd_flag & ND_NFSV3)
 884                 rt->flag |= DRT_NFSV3;
 885         rt->proc = nd->nd_procnum;
 886         if (nd->nd_nam->sa_family == AF_INET)
 887             rt->ipadr = ((struct sockaddr_in *)nd->nd_nam)->sin_addr.s_addr;
 888         else
 889             rt->ipadr = INADDR_ANY;
 890         rt->resptime = nfs_curusec() - (nd->nd_starttime.tv_sec * 1000000 + nd->nd_starttime.tv_usec);
 891         getmicrotime(&rt->tstamp);
 892         nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ;
 893 }
 894 #endif /* NFS_NOSERVER */
 895
 896 static int nfs_defect = 0;
 897 SYSCTL_INT(_vfs_nfs, OID_AUTO, defect, CTLFLAG_RW, &nfs_defect, 0, "");
 898
 899 /*
 900  * Asynchronous I/O daemons for client nfs.
 901  * They do read-ahead and write-behind operations on the block I/O cache.
 902  * Never returns unless it fails or gets killed.
 903  */
 904 static int
 905 nfssvc_iod(struct thread *td)
 906 {
 907         struct buf *bp;
 908         int i, myiod;
 909         struct nfsmount *nmp;
 910         int error = 0;
 911
 912         /*
 913          * Assign my position or return error if too many already running
 914          */
 915         myiod = -1;
 916         for (i = 0; i < NFS_MAXASYNCDAEMON; i++)
 917                 if (nfs_asyncdaemon[i] == 0) {
 918                         nfs_asyncdaemon[i]++;
 919                         myiod = i;
 920                         break;
 921                 }
 922         if (myiod == -1)
 923                 return (EBUSY);
 924         nfs_numasync++;
 925         /*
 926          * Just loop around doin our stuff until SIGKILL
 927          */
 928         for (;;) {
 929             while (((nmp = nfs_iodmount[myiod]) == NULL
 930                     || nmp->nm_bufq.tqh_first == NULL)
 931                    && error == 0) {
 932                 if (nmp)
 933                     nmp->nm_bufqiods--;
 934                 nfs_iodwant[myiod] = td;
 935                 nfs_iodmount[myiod] = NULL;
 936                 error = tsleep((caddr_t)&nfs_iodwant[myiod],
 937                         PCATCH, "nfsidl", 0);
 938             }
 939             if (error) {
 940                 nfs_asyncdaemon[myiod] = 0;
 941                 if (nmp)
 942                     nmp->nm_bufqiods--;
 943                 nfs_iodwant[myiod] = NULL;
 944                 nfs_iodmount[myiod] = NULL;
 945                 nfs_numasync--;
 946                 return (error);
 947             }
 948             while ((bp = nmp->nm_bufq.tqh_first) != NULL) {
 949                 /* Take one off the front of the list */
 950                 TAILQ_REMOVE(&nmp->nm_bufq, bp, b_freelist);
 951                 nmp->nm_bufqlen--;
 952                 if (nmp->nm_bufqwant && nmp->nm_bufqlen <= nfs_numasync) {
 953                     nmp->nm_bufqwant = FALSE;
 954                     wakeup(&nmp->nm_bufq);
 955                 }
 956                 (void) nfs_doio(bp, NULL);
 957                 /*
 958                  * If there are more than one iod on this mount, then defect
 959                  * so that the iods can be shared out fairly between the mounts
 960                  */
 961                 if (nfs_defect && nmp->nm_bufqiods > 1) {
 962                     NFS_DPF(ASYNCIO,
 963                             ("nfssvc_iod: iod %d defecting from mount %p\n",
 964                              myiod, nmp));
 965                     nfs_iodmount[myiod] = NULL;
 966                     nmp->nm_bufqiods--;
 967                     break;
 968                 }
 969             }
 970         }
 971 }
 972
 973
 974 /*
 975  * Get an authorization string for the uid by having the mount_nfs sitting
 976  * on this mount point porpous out of the kernel and do it.
 977  */
 978 int
 979 nfs_getauth(nmp, rep, cred, auth_str, auth_len, verf_str, verf_len, key)
 980         struct nfsmount *nmp;
 981         struct nfsreq *rep;
 982         struct ucred *cred;
 983         char **auth_str;
 984         int *auth_len;
 985         char *verf_str;
 986         int *verf_len;
 987         NFSKERBKEY_T key;               /* return session key */
 988 {
 989         int error = 0;
 990
 991         while ((nmp->nm_state & NFSSTA_WAITAUTH) == 0) {
 992                 nmp->nm_state |= NFSSTA_WANTAUTH;
 993                 (void) tsleep((caddr_t)&nmp->nm_authtype, 0,
 994                         "nfsauth1", 2 * hz);
 995                 error = nfs_sigintr(nmp, rep, rep->r_td);
 996                 if (error) {
 997                         nmp->nm_state &= ~NFSSTA_WANTAUTH;
 998                         return (error);
 999                 }
1000         }
1001         nmp->nm_state &= ~(NFSSTA_WAITAUTH | NFSSTA_WANTAUTH);
1002         nmp->nm_authstr = *auth_str = (char *)malloc(RPCAUTH_MAXSIZ, M_TEMP, M_WAITOK);
1003         nmp->nm_authlen = RPCAUTH_MAXSIZ;
1004         nmp->nm_verfstr = verf_str;
1005         nmp->nm_verflen = *verf_len;
1006         nmp->nm_authuid = cred->cr_uid;
1007         wakeup((caddr_t)&nmp->nm_authstr);
1008
1009         /*
1010          * And wait for mount_nfs to do its stuff.
1011          */
1012         while ((nmp->nm_state & NFSSTA_HASAUTH) == 0 && error == 0) {
1013                 (void) tsleep((caddr_t)&nmp->nm_authlen, 0,
1014                         "nfsauth2", 2 * hz);
1015                 error = nfs_sigintr(nmp, rep, rep->r_td);
1016         }
1017         if (nmp->nm_state & NFSSTA_AUTHERR) {
1018                 nmp->nm_state &= ~NFSSTA_AUTHERR;
1019                 error = EAUTH;
1020         }
1021         if (error)
1022                 free((caddr_t)*auth_str, M_TEMP);
1023         else {
1024                 *auth_len = nmp->nm_authlen;
1025                 *verf_len = nmp->nm_verflen;
1026                 bcopy((caddr_t)nmp->nm_key, (caddr_t)key, sizeof (key));
1027         }
1028         nmp->nm_state &= ~NFSSTA_HASAUTH;
1029         nmp->nm_state |= NFSSTA_WAITAUTH;
1030         if (nmp->nm_state & NFSSTA_WANTAUTH) {
1031                 nmp->nm_state &= ~NFSSTA_WANTAUTH;
1032                 wakeup((caddr_t)&nmp->nm_authtype);
1033         }
1034         return (error);
1035 }
1036
1037 /*
1038  * Get a nickname authenticator and verifier.
1039  */
1040 int
1041 nfs_getnickauth(nmp, cred, auth_str, auth_len, verf_str, verf_len)
1042         struct nfsmount *nmp;
1043         struct ucred *cred;
1044         char **auth_str;
1045         int *auth_len;
1046         char *verf_str;
1047         int verf_len;
1048 {
1049         struct nfsuid *nuidp;
1050         u_int32_t *nickp, *verfp;
1051         struct timeval ktvin, ktvout;
1052
1053 #ifdef DIAGNOSTIC
1054         if (verf_len < (4 * NFSX_UNSIGNED))
1055                 panic("nfs_getnickauth verf too small");
1056 #endif
1057         for (nuidp = NMUIDHASH(nmp, cred->cr_uid)->lh_first;
1058             nuidp != 0; nuidp = nuidp->nu_hash.le_next) {
1059                 if (nuidp->nu_cr.cr_uid == cred->cr_uid)
1060                         break;
1061         }
1062         if (!nuidp || nuidp->nu_expire < time_second)
1063                 return (EACCES);
1064
1065         /*
1066          * Move to the end of the lru list (end of lru == most recently used).
1067          */
1068         TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru);
1069         TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, nu_lru);
1070
1071         nickp = (u_int32_t *)malloc(2 * NFSX_UNSIGNED, M_TEMP, M_WAITOK);
1072         *nickp++ = txdr_unsigned(RPCAKN_NICKNAME);
1073         *nickp = txdr_unsigned(nuidp->nu_nickname);
1074         *auth_str = (char *)nickp;
1075         *auth_len = 2 * NFSX_UNSIGNED;
1076
1077         /*
1078          * Now we must encrypt the verifier and package it up.
1079          */
1080         verfp = (u_int32_t *)verf_str;
1081         *verfp++ = txdr_unsigned(RPCAKN_NICKNAME);
1082         if (time_second > nuidp->nu_timestamp.tv_sec ||
1083             (time_second == nuidp->nu_timestamp.tv_sec &&
1084              time_second > nuidp->nu_timestamp.tv_usec))
1085                 getmicrotime(&nuidp->nu_timestamp);
1086         else
1087                 nuidp->nu_timestamp.tv_usec++;
1088         ktvin.tv_sec = txdr_unsigned(nuidp->nu_timestamp.tv_sec);
1089         ktvin.tv_usec = txdr_unsigned(nuidp->nu_timestamp.tv_usec);
1090
1091         /*
1092          * Now encrypt the timestamp verifier in ecb mode using the session
1093          * key.
1094          */
1095 #ifdef NFSKERB
1096         XXX
1097 #endif
1098
1099         *verfp++ = ktvout.tv_sec;
1100         *verfp++ = ktvout.tv_usec;
1101         *verfp = 0;
1102         return (0);
1103 }
1104
1105 /*
1106  * Save the current nickname in a hash list entry on the mount point.
1107  */
1108 int
1109 nfs_savenickauth(nmp, cred, len, key, mdp, dposp, mrep)
1110         struct nfsmount *nmp;
1111         struct ucred *cred;
1112         int len;
1113         NFSKERBKEY_T key;
1114         struct mbuf **mdp;
1115         char **dposp;
1116         struct mbuf *mrep;
1117 {
1118         struct nfsuid *nuidp;
1119         u_int32_t *tl;
1120         int32_t t1;
1121         struct mbuf *md = *mdp;
1122         struct timeval ktvin, ktvout;
1123         u_int32_t nick;
1124         char *dpos = *dposp, *cp2;
1125         int deltasec, error = 0;
1126
1127         if (len == (3 * NFSX_UNSIGNED)) {
1128                 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
1129                 ktvin.tv_sec = *tl++;
1130                 ktvin.tv_usec = *tl++;
1131                 nick = fxdr_unsigned(u_int32_t, *tl);
1132
1133                 /*
1134                  * Decrypt the timestamp in ecb mode.
1135                  */
1136 #ifdef NFSKERB
1137                 XXX
1138 #endif
1139                 ktvout.tv_sec = fxdr_unsigned(long, ktvout.tv_sec);
1140                 ktvout.tv_usec = fxdr_unsigned(long, ktvout.tv_usec);
1141                 deltasec = time_second - ktvout.tv_sec;
1142                 if (deltasec < 0)
1143                         deltasec = -deltasec;
1144                 /*
1145                  * If ok, add it to the hash list for the mount point.
1146                  */
1147                 if (deltasec <= NFS_KERBCLOCKSKEW) {
1148                         if (nmp->nm_numuids < nuidhash_max) {
1149                                 nmp->nm_numuids++;
1150                                 nuidp = (struct nfsuid *)
1151                                    malloc(sizeof (struct nfsuid), M_NFSUID,
1152                                         M_WAITOK);
1153                         } else {
1154                                 nuidp = nmp->nm_uidlruhead.tqh_first;
1155                                 LIST_REMOVE(nuidp, nu_hash);
1156                                 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp,
1157                                         nu_lru);
1158                         }
1159                         nuidp->nu_flag = 0;
1160                         nuidp->nu_cr.cr_uid = cred->cr_uid;
1161                         nuidp->nu_expire = time_second + NFS_KERBTTL;
1162                         nuidp->nu_timestamp = ktvout;
1163                         nuidp->nu_nickname = nick;
1164                         bcopy(key, nuidp->nu_key, sizeof (key));
1165                         TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp,
1166                                 nu_lru);
1167                         LIST_INSERT_HEAD(NMUIDHASH(nmp, cred->cr_uid),
1168                                 nuidp, nu_hash);
1169                 }
1170         } else
1171                 nfsm_adv(nfsm_rndup(len));
1172 nfsmout:
1173         *mdp = md;
1174         *dposp = dpos;
1175         return (error);
1176 }