sys/vfs/nfs/nfs_syscalls.c

   1 /*
   2  * Copyright (c) 1989, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Rick Macklem at The University of Guelph.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by the University of
  19  *      California, Berkeley and its contributors.
  20  * 4. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  *
  36  *      @(#)nfs_syscalls.c      8.5 (Berkeley) 3/30/95
  37  * $FreeBSD: src/sys/nfs/nfs_syscalls.c,v 1.58.2.1 2000/11/26 02:30:06 dillon Exp $
  38  * $DragonFly: src/sys/vfs/nfs/nfs_syscalls.c,v 1.31 2008/01/05 14:02:41 swildner Exp $
  39  */
  40
  41 #include <sys/param.h>
  42 #include <sys/systm.h>
  43 #include <sys/sysproto.h>
  44 #include <sys/kernel.h>
  45 #include <sys/sysctl.h>
  46 #include <sys/file.h>
  47 #include <sys/filedesc.h>
  48 #include <sys/vnode.h>
  49 #include <sys/malloc.h>
  50 #include <sys/mount.h>
  51 #include <sys/proc.h>
  52 #include <sys/priv.h>
  53 #include <sys/buf.h>
  54 #include <sys/mbuf.h>
  55 #include <sys/resourcevar.h>
  56 #include <sys/socket.h>
  57 #include <sys/socketvar.h>
  58 #include <sys/domain.h>
  59 #include <sys/protosw.h>
  60 #include <sys/nlookup.h>
  61
  62 #include <sys/mutex2.h>
  63 #include <sys/thread2.h>
  64
  65 #include <netinet/in.h>
  66 #include <netinet/tcp.h>
  67 #include "xdr_subs.h"
  68 #include "rpcv2.h"
  69 #include "nfsproto.h"
  70 #include "nfs.h"
  71 #include "nfsm_subs.h"
  72 #include "nfsrvcache.h"
  73 #include "nfsmount.h"
  74 #include "nfsnode.h"
  75 #include "nfsrtt.h"
  76
  77 #include <sys/thread2.h>
  78
  79 static MALLOC_DEFINE(M_NFSSVC, "NFS srvsock", "Nfs server structure");
  80
  81 static int nuidhash_max = NFS_MAXUIDHASH;
  82
  83 #ifndef NFS_NOSERVER
  84 static void     nfsrv_zapsock (struct nfssvc_sock *slp);
  85 #endif
  86
  87 #define TRUE    1
  88 #define FALSE   0
  89
  90 SYSCTL_DECL(_vfs_nfs);
  91
  92 #ifndef NFS_NOSERVER
  93 int nfsd_waiting = 0;
  94 static struct nfsdrt nfsdrt;
  95 static int nfs_numnfsd = 0;
  96 static void     nfsd_rt (int sotype, struct nfsrv_descript *nd,
  97                              int cacherep);
  98 static int      nfssvc_addsock (struct file *, struct sockaddr *,
  99                                     struct thread *);
 100 static int      nfssvc_nfsd (struct nfsd_srvargs *,caddr_t,struct thread *);
 101
 102 static int nfs_privport = 0;
 103 SYSCTL_INT(_vfs_nfs, NFS_NFSPRIVPORT, nfs_privport, CTLFLAG_RW, &nfs_privport,
 104     0, "Enable privileged source port checks");
 105 SYSCTL_INT(_vfs_nfs, OID_AUTO, gatherdelay, CTLFLAG_RW, &nfsrvw_procrastinate, 0,
 106     "Enable NFS request procrastination");
 107 SYSCTL_INT(_vfs_nfs, OID_AUTO, gatherdelay_v3, CTLFLAG_RW, &nfsrvw_procrastinate_v3, 0,
 108     "Enable NFSv3 request procrastination");
 109 int     nfs_soreserve = NFS_MAXPACKET * NFS_MAXASYNCBIO;
 110 SYSCTL_INT(_vfs_nfs, OID_AUTO, soreserve, CTLFLAG_RW, &nfs_soreserve, 0,
 111     "Minimum NFS socket buffer size reservation");
 112
 113 /*
 114  * NFS server system calls
 115  */
 116
 117 #endif /* NFS_NOSERVER */
 118 /*
 119  * nfssvc_args(int flag, caddr_t argp)
 120  *
 121  * Nfs server psuedo system call for the nfsd's
 122  * Based on the flag value it either:
 123  * - adds a socket to the selection list
 124  * - remains in the kernel as an nfsd
 125  * - remains in the kernel as an nfsiod
 126  *
 127  * MPALMOSTSAFE
 128  */
 129 int
 130 sys_nfssvc(struct nfssvc_args *uap)
 131 {
 132 #ifndef NFS_NOSERVER
 133         struct nlookupdata nd;
 134         struct file *fp;
 135         struct sockaddr *nam;
 136         struct nfsd_args nfsdarg;
 137         struct nfsd_srvargs nfsd_srvargs, *nsd = &nfsd_srvargs;
 138         struct nfsd_cargs ncd;
 139         struct nfsd *nfsd;
 140         struct nfssvc_sock *slp;
 141         struct nfsuid *nuidp;
 142         struct nfsmount *nmp;
 143         struct vnode *vp;
 144 #endif /* NFS_NOSERVER */
 145         int error;
 146         struct thread *td = curthread;
 147
 148         /*
 149          * Must be super user
 150          */
 151         error = priv_check(td, PRIV_ROOT);
 152         if (error)
 153                 return (error);
 154
 155         lwkt_gettoken(&nfs_token);
 156
 157         while (nfssvc_sockhead_flag & SLP_INIT) {
 158                 nfssvc_sockhead_flag |= SLP_WANTINIT;
 159                 tsleep((caddr_t)&nfssvc_sockhead, 0, "nfsd init", 0);
 160         }
 161         if (uap->flag & NFSSVC_BIOD)
 162                 error = ENXIO;          /* no longer need nfsiod's */
 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                         goto done;
 171                 vp = NULL;
 172                 error = nlookup_init(&nd, ncd.ncd_dirp, UIO_USERSPACE,
 173                                         NLC_FOLLOW);
 174                 if (error == 0)
 175                         error = nlookup(&nd);
 176                 if (error == 0)
 177                         error = cache_vget(&nd.nl_nch, nd.nl_cred, LK_EXCLUSIVE, &vp);
 178                 nlookup_done(&nd);
 179                 if (error)
 180                         goto done;
 181
 182                 if ((vp->v_flag & VROOT) == 0)
 183                         error = EINVAL;
 184                 nmp = VFSTONFS(vp->v_mount);
 185                 vput(vp);
 186                 if (error)
 187                         goto done;
 188                 if ((nmp->nm_state & NFSSTA_MNTD) &&
 189                         (uap->flag & NFSSVC_GOTAUTH) == 0) {
 190                         error = 0;
 191                         goto done;
 192                 }
 193                 nmp->nm_state |= NFSSTA_MNTD;
 194                 error = nfs_clientd(nmp, td->td_ucred, &ncd, uap->flag,
 195                                     uap->argp, td);
 196         } else if (uap->flag & NFSSVC_ADDSOCK) {
 197                 error = copyin(uap->argp, (caddr_t)&nfsdarg, sizeof(nfsdarg));
 198                 if (error)
 199                         goto done;
 200                 error = holdsock(td->td_proc->p_fd, nfsdarg.sock, &fp);
 201                 if (error)
 202                         goto done;
 203                 /*
 204                  * Get the client address for connected sockets.
 205                  */
 206                 if (nfsdarg.name == NULL || nfsdarg.namelen == 0)
 207                         nam = NULL;
 208                 else {
 209                         error = getsockaddr(&nam, nfsdarg.name,
 210                                             nfsdarg.namelen);
 211                         if (error) {
 212                                 fdrop(fp);
 213                                 goto done;
 214                         }
 215                 }
 216                 error = nfssvc_addsock(fp, nam, td);
 217                 fdrop(fp);
 218         } else {
 219                 error = copyin(uap->argp, (caddr_t)nsd, sizeof (*nsd));
 220                 if (error)
 221                         goto done;
 222                 if ((uap->flag & NFSSVC_AUTHIN) &&
 223                     ((nfsd = nsd->nsd_nfsd)) != NULL &&
 224                     (nfsd->nfsd_slp->ns_flag & SLP_VALID)) {
 225                         slp = nfsd->nfsd_slp;
 226
 227                         /*
 228                          * First check to see if another nfsd has already
 229                          * added this credential.
 230                          */
 231                         for (nuidp = NUIDHASH(slp,nsd->nsd_cr.cr_uid)->lh_first;
 232                             nuidp != 0; nuidp = nuidp->nu_hash.le_next) {
 233                                 if (nuidp->nu_cr.cr_uid == nsd->nsd_cr.cr_uid &&
 234                                     (!nfsd->nfsd_nd->nd_nam2 ||
 235                                      netaddr_match(NU_NETFAM(nuidp),
 236                                      &nuidp->nu_haddr, nfsd->nfsd_nd->nd_nam2)))
 237                                         break;
 238                         }
 239                         if (nuidp) {
 240                             nfsrv_setcred(&nuidp->nu_cr,&nfsd->nfsd_nd->nd_cr);
 241                             nfsd->nfsd_nd->nd_flag |= ND_KERBFULL;
 242                         } else {
 243                             /*
 244                              * Nope, so we will.
 245                              */
 246                             if (slp->ns_numuids < nuidhash_max) {
 247                                 slp->ns_numuids++;
 248                                 nuidp = (struct nfsuid *)
 249                                    kmalloc(sizeof (struct nfsuid), M_NFSUID,
 250                                         M_WAITOK);
 251                             } else
 252                                 nuidp = NULL;
 253                             if ((slp->ns_flag & SLP_VALID) == 0) {
 254                                 if (nuidp)
 255                                     kfree((caddr_t)nuidp, M_NFSUID);
 256                             } else {
 257                                 if (nuidp == NULL) {
 258                                     nuidp = TAILQ_FIRST(&slp->ns_uidlruhead);
 259                                     LIST_REMOVE(nuidp, nu_hash);
 260                                     TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp,
 261                                         nu_lru);
 262                                     if (nuidp->nu_flag & NU_NAM)
 263                                         FREE(nuidp->nu_nam, M_SONAME);
 264                                 }
 265                                 nuidp->nu_flag = 0;
 266                                 nuidp->nu_cr = nsd->nsd_cr;
 267                                 if (nuidp->nu_cr.cr_ngroups > NGROUPS)
 268                                     nuidp->nu_cr.cr_ngroups = NGROUPS;
 269                                 nuidp->nu_cr.cr_ref = 1;
 270                                 nuidp->nu_timestamp = nsd->nsd_timestamp;
 271                                 nuidp->nu_expire = time_second + nsd->nsd_ttl;
 272                                 /*
 273                                  * and save the session key in nu_key.
 274                                  */
 275                                 bcopy(nsd->nsd_key, nuidp->nu_key,
 276                                     sizeof (nsd->nsd_key));
 277                                 if (nfsd->nfsd_nd->nd_nam2) {
 278                                     struct sockaddr_in *saddr;
 279
 280                                     saddr = (struct sockaddr_in *)
 281                                             nfsd->nfsd_nd->nd_nam2;
 282                                     switch (saddr->sin_family) {
 283                                     case AF_INET:
 284                                         nuidp->nu_flag |= NU_INETADDR;
 285                                         nuidp->nu_inetaddr =
 286                                              saddr->sin_addr.s_addr;
 287                                         break;
 288                                     case AF_ISO:
 289                                     default:
 290                                         nuidp->nu_flag |= NU_NAM;
 291                                         nuidp->nu_nam =
 292                                           dup_sockaddr(nfsd->nfsd_nd->nd_nam2);
 293                                         break;
 294                                     };
 295                                 }
 296                                 TAILQ_INSERT_TAIL(&slp->ns_uidlruhead, nuidp,
 297                                         nu_lru);
 298                                 LIST_INSERT_HEAD(NUIDHASH(slp, nsd->nsd_uid),
 299                                         nuidp, nu_hash);
 300                                 nfsrv_setcred(&nuidp->nu_cr,
 301                                     &nfsd->nfsd_nd->nd_cr);
 302                                 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL;
 303                             }
 304                         }
 305                 }
 306                 if ((uap->flag & NFSSVC_AUTHINFAIL) && (nfsd = nsd->nsd_nfsd))
 307                         nfsd->nfsd_flag |= NFSD_AUTHFAIL;
 308                 error = nfssvc_nfsd(nsd, uap->argp, td);
 309         }
 310 #endif /* NFS_NOSERVER */
 311         if (error == EINTR || error == ERESTART)
 312                 error = 0;
 313 done:
 314         lwkt_reltoken(&nfs_token);
 315         return (error);
 316 }
 317
 318 #ifndef NFS_NOSERVER
 319 /*
 320  * Adds a socket to the list for servicing by nfsds.
 321  */
 322 static int
 323 nfssvc_addsock(struct file *fp, struct sockaddr *mynam, struct thread *td)
 324 {
 325         int siz;
 326         struct nfssvc_sock *slp;
 327         struct socket *so;
 328         int error;
 329
 330         so = (struct socket *)fp->f_data;
 331 #if 0
 332         tslp = NULL;
 333         /*
 334          * Add it to the list, as required.
 335          */
 336         if (so->so_proto->pr_protocol == IPPROTO_UDP) {
 337                 tslp = nfs_udpsock;
 338                 if (tslp->ns_flag & SLP_VALID) {
 339                         if (mynam != NULL)
 340                                 FREE(mynam, M_SONAME);
 341                         return (EPERM);
 342                 }
 343         }
 344 #endif
 345         /*
 346          * Reserve buffer space in the socket.  Note that due to bugs in
 347          * Linux's delayed-ack code, serious performance degredation may
 348          * occur with linux hosts if the minimum is used.
 349          *
 350          * NFS sockets are not limited to the standard sb_max or by
 351          * resource limits.
 352          */
 353         if (so->so_type == SOCK_STREAM)
 354                 siz = NFS_MAXPACKET + sizeof (u_long);
 355         else
 356                 siz = NFS_MAXPACKET;
 357         if (siz < nfs_soreserve)
 358             siz = nfs_soreserve;
 359
 360         error = soreserve(so, siz, siz, NULL);
 361         if (error) {
 362                 if (mynam != NULL)
 363                         FREE(mynam, M_SONAME);
 364                 return (error);
 365         }
 366
 367         /*
 368          * Set protocol specific options { for now TCP only } and
 369          * reserve some space. For datagram sockets, this can get called
 370          * repeatedly for the same socket, but that isn't harmful.
 371          */
 372         if (so->so_type == SOCK_STREAM) {
 373                 struct sockopt sopt;
 374                 int val;
 375
 376                 bzero(&sopt, sizeof sopt);
 377                 sopt.sopt_level = SOL_SOCKET;
 378                 sopt.sopt_name = SO_KEEPALIVE;
 379                 sopt.sopt_val = &val;
 380                 sopt.sopt_valsize = sizeof val;
 381                 val = 1;
 382                 sosetopt(so, &sopt);
 383         }
 384         if (so->so_proto->pr_domain->dom_family == AF_INET &&
 385             so->so_proto->pr_protocol == IPPROTO_TCP) {
 386                 struct sockopt sopt;
 387                 int val;
 388
 389                 bzero(&sopt, sizeof sopt);
 390                 sopt.sopt_level = IPPROTO_TCP;
 391                 sopt.sopt_name = TCP_NODELAY;
 392                 sopt.sopt_val = &val;
 393                 sopt.sopt_valsize = sizeof val;
 394                 val = 1;
 395                 sosetopt(so, &sopt);
 396
 397                 bzero(&sopt, sizeof sopt);
 398                 sopt.sopt_level = IPPROTO_TCP;
 399                 sopt.sopt_name = TCP_FASTKEEP;
 400                 sopt.sopt_val = &val;
 401                 sopt.sopt_valsize = sizeof val;
 402                 val = 1;
 403                 sosetopt(so, &sopt);
 404         }
 405         atomic_clear_int(&so->so_rcv.ssb_flags, SSB_NOINTR);
 406         so->so_rcv.ssb_timeo = 0;
 407         atomic_clear_int(&so->so_snd.ssb_flags, SSB_NOINTR);
 408         so->so_snd.ssb_timeo = 0;
 409
 410         slp = kmalloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK | M_ZERO);
 411         mtx_init(&slp->ns_solock);
 412         STAILQ_INIT(&slp->ns_rec);
 413         TAILQ_INIT(&slp->ns_uidlruhead);
 414         lwkt_token_init(&slp->ns_token, "nfssrv_token");
 415
 416         lwkt_gettoken(&nfs_token);
 417         nfsrv_slpref(slp);
 418         TAILQ_INSERT_TAIL(&nfssvc_sockhead, slp, ns_chain);
 419         lwkt_gettoken(&slp->ns_token);
 420
 421         slp->ns_so = so;
 422         slp->ns_nam = mynam;
 423         fp->f_count++;
 424         slp->ns_fp = fp;
 425
 426         so->so_upcallarg = (caddr_t)slp;
 427         so->so_upcall = nfsrv_rcv_upcall;
 428         atomic_set_int(&so->so_rcv.ssb_flags, SSB_UPCALL);
 429         slp->ns_flag = (SLP_VALID | SLP_NEEDQ);
 430         nfsrv_wakenfsd(slp, 1);
 431
 432         lwkt_reltoken(&slp->ns_token);
 433         lwkt_reltoken(&nfs_token);
 434
 435         return (0);
 436 }
 437
 438 /*
 439  * Called by nfssvc() for nfsds. Just loops around servicing rpc requests
 440  * until it is killed by a signal.
 441  */
 442 static int
 443 nfssvc_nfsd(struct nfsd_srvargs *nsd, caddr_t argp, struct thread *td)
 444 {
 445         int siz;
 446         struct nfssvc_sock *slp;
 447         struct nfsd *nfsd = nsd->nsd_nfsd;
 448         struct nfsrv_descript *nd = NULL;
 449         struct mbuf *m, *mreq;
 450         int error, cacherep, sotype, writes_todo;
 451         int procrastinate;
 452         u_quad_t cur_usec;
 453
 454 #ifndef nolint
 455         cacherep = RC_DOIT;
 456         writes_todo = 0;
 457 #endif
 458         lwkt_gettoken(&nfs_token);
 459
 460         if (nfsd == NULL) {
 461                 nsd->nsd_nfsd = nfsd = (struct nfsd *)
 462                         kmalloc(sizeof (struct nfsd), M_NFSD, M_WAITOK|M_ZERO);
 463                 nfsd->nfsd_td = td;
 464                 TAILQ_INSERT_TAIL(&nfsd_head, nfsd, nfsd_chain);
 465                 nfs_numnfsd++;
 466         }
 467
 468         /*
 469          * Loop getting rpc requests until SIGKILL.
 470          */
 471         for (;;) {
 472                 if ((nfsd->nfsd_flag & NFSD_REQINPROG) == 0) {
 473                         while (nfsd->nfsd_slp == NULL &&
 474                             (nfsd_head_flag & NFSD_CHECKSLP) == 0) {
 475                                 nfsd->nfsd_flag |= NFSD_WAITING;
 476                                 nfsd_waiting++;
 477                                 error = tsleep(nfsd, PCATCH, "nfsd", 0);
 478                                 nfsd_waiting--;
 479                                 if (error && nfsd->nfsd_slp == NULL)
 480                                         goto done;
 481                         }
 482                         if (nfsd->nfsd_slp == NULL &&
 483                             (nfsd_head_flag & NFSD_CHECKSLP)) {
 484                                 TAILQ_FOREACH(slp, &nfssvc_sockhead, ns_chain) {
 485                                     if ((slp->ns_flag & SLP_ACTION_MASK) ||
 486                                         slp->ns_needq_upcall) {
 487                                             nfsrv_slpref(slp);
 488                                             nfsd->nfsd_slp = slp;
 489                                             break;
 490                                     }
 491                                 }
 492                                 if (slp == NULL)
 493                                         nfsd_head_flag &= ~NFSD_CHECKSLP;
 494                         }
 495                         if ((slp = nfsd->nfsd_slp) == NULL)
 496                                 continue;
 497
 498                         lwkt_reltoken(&nfs_token);
 499                         lwkt_gettoken(&slp->ns_token);
 500
 501                         if (slp->ns_needq_upcall) {
 502                                 slp->ns_needq_upcall = 0;
 503                                 slp->ns_flag |= SLP_NEEDQ;
 504                         }
 505
 506                         if (slp->ns_flag & SLP_VALID) {
 507                                 /*
 508                                  * We can both process additional received
 509                                  * data into new records and process existing
 510                                  * records.  This keeps the pipeline hot by
 511                                  * allowing the tcp socket to continue to
 512                                  * drain while we are processing records.
 513                                  */
 514                                 if (slp->ns_flag & SLP_DISCONN) {
 515                                         nfsrv_zapsock(slp);
 516                                 } else if (slp->ns_flag & SLP_NEEDQ) {
 517                                         (void)nfs_slplock(slp, 1);
 518                                         nfsrv_rcv(slp->ns_so, (caddr_t)slp,
 519                                                   MB_WAIT);
 520                                         nfs_slpunlock(slp);
 521                                 }
 522                                 error = nfsrv_dorec(slp, nfsd, &nd);
 523                                 cur_usec = nfs_curusec();
 524                                 if (error && slp->ns_tq.lh_first &&
 525                                     slp->ns_tq.lh_first->nd_time <= cur_usec) {
 526                                         error = 0;
 527                                         cacherep = RC_DOIT;
 528                                         writes_todo = 1;
 529                                 } else {
 530                                         writes_todo = 0;
 531                                 }
 532                                 nfsd->nfsd_flag |= NFSD_REQINPROG;
 533                         } else {
 534                                 slp->ns_flag &= ~SLP_ACTION_MASK;
 535                                 error = 0;
 536                         }
 537                 } else {
 538                         error = 0;
 539                         slp = nfsd->nfsd_slp;
 540
 541                         lwkt_reltoken(&nfs_token);
 542                         lwkt_gettoken(&slp->ns_token);
 543
 544                         if (slp->ns_needq_upcall) {
 545                                 slp->ns_needq_upcall = 0;
 546                                 slp->ns_flag |= SLP_NEEDQ;
 547                         }
 548                         if (NFSRV_RECLIMIT(slp) == 0 &&
 549                             (slp->ns_flag & SLP_NEEDQ)) {
 550                                 (void)nfs_slplock(slp, 1);
 551                                 nfsrv_rcv(slp->ns_so, (caddr_t)slp,
 552                                           MB_WAIT);
 553                                 nfs_slpunlock(slp);
 554                         }
 555                 }
 556
 557                 /*
 558                  * nfs_token not held here.  slp token is held.
 559                  */
 560                 if (error || (slp->ns_flag & SLP_VALID) == 0) {
 561                         if (nd) {
 562                                 kfree((caddr_t)nd, M_NFSRVDESC);
 563                                 nd = NULL;
 564                         }
 565                         nfsd->nfsd_flag &= ~NFSD_REQINPROG;
 566                         if (slp->ns_flag & SLP_ACTION_MASK) {
 567                                 lwkt_reltoken(&slp->ns_token);
 568                                 lwkt_gettoken(&nfs_token);
 569                         } else {
 570                                 nfsd->nfsd_slp = NULL;
 571                                 lwkt_reltoken(&slp->ns_token);
 572                                 lwkt_gettoken(&nfs_token);
 573                                 nfsrv_slpderef(slp);
 574                         }
 575                         continue;
 576                 }
 577
 578                 /*
 579                  * Execute the NFS request - handle the server side cache
 580                  *
 581                  * nfs_token not held here.  slp token is held.
 582                  */
 583                 sotype = slp->ns_so->so_type;
 584                 if (nd) {
 585                     getmicrotime(&nd->nd_starttime);
 586                     if (nd->nd_nam2)
 587                         nd->nd_nam = nd->nd_nam2;
 588                     else
 589                         nd->nd_nam = slp->ns_nam;
 590
 591                     /*
 592                      * Check to see if authorization is needed.
 593                      */
 594                     if (nfsd->nfsd_flag & NFSD_NEEDAUTH) {
 595                         nfsd->nfsd_flag &= ~NFSD_NEEDAUTH;
 596                         nsd->nsd_haddr =
 597                                 ((struct sockaddr_in *)
 598                                  nd->nd_nam)->sin_addr.s_addr;
 599                         nsd->nsd_authlen = nfsd->nfsd_authlen;
 600                         nsd->nsd_verflen = nfsd->nfsd_verflen;
 601                         if (!copyout(nfsd->nfsd_authstr,nsd->nsd_authstr,
 602                                 nfsd->nfsd_authlen) &&
 603                             !copyout(nfsd->nfsd_verfstr, nsd->nsd_verfstr,
 604                                 nfsd->nfsd_verflen) &&
 605                             !copyout((caddr_t)nsd, argp, sizeof (*nsd)))
 606                             lwkt_reltoken(&slp->ns_token);
 607                             return (ENEEDAUTH);
 608                         cacherep = RC_DROPIT;
 609                     } else {
 610                         cacherep = nfsrv_getcache(nd, slp, &mreq);
 611                     }
 612
 613                     if (nfsd->nfsd_flag & NFSD_AUTHFAIL) {
 614                         nfsd->nfsd_flag &= ~NFSD_AUTHFAIL;
 615                         nd->nd_procnum = NFSPROC_NOOP;
 616                         nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
 617                         cacherep = RC_DOIT;
 618                     } else if (nfs_privport) {
 619                         /* Check if source port is privileged */
 620                         u_short port;
 621                         struct sockaddr *nam = nd->nd_nam;
 622                         struct sockaddr_in *sin;
 623
 624                         sin = (struct sockaddr_in *)nam;
 625                         port = ntohs(sin->sin_port);
 626                         if (port >= IPPORT_RESERVED &&
 627                             nd->nd_procnum != NFSPROC_NULL) {
 628                             nd->nd_procnum = NFSPROC_NOOP;
 629                             nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
 630                             cacherep = RC_DOIT;
 631                             kprintf("NFS request from unprivileged port (%s:%d)\n",
 632                                    inet_ntoa(sin->sin_addr), port);
 633                         }
 634                     }
 635
 636                 }
 637
 638                 /*
 639                  * Execute the NFS request - direct execution
 640                  *
 641                  * Loop to get all the write rpc replies that have been
 642                  * gathered together.
 643                  *
 644                  * nfs_token not held here.  slp token is held.
 645                  */
 646                 do {
 647                     switch (cacherep) {
 648                     case RC_DOIT:
 649                         if (nd && (nd->nd_flag & ND_NFSV3))
 650                             procrastinate = nfsrvw_procrastinate_v3;
 651                         else
 652                             procrastinate = nfsrvw_procrastinate;
 653                         if (writes_todo || (nd->nd_procnum == NFSPROC_WRITE &&
 654                             procrastinate > 0)
 655                         ) {
 656                             error = nfsrv_writegather(&nd, slp,
 657                                                       nfsd->nfsd_td, &mreq);
 658                         } else {
 659                             /* NOT YET lwkt_reltoken(&slp->ns_token); */
 660                             error = (*(nfsrv3_procs[nd->nd_procnum]))(nd,
 661                                                 slp, nfsd->nfsd_td, &mreq);
 662                             /* NOT YET lwkt_gettoken(&slp->ns_token); */
 663                         }
 664                         if (mreq == NULL)
 665                                 break;
 666                         if (error != 0 && error != NFSERR_RETVOID) {
 667                                 if (nd->nd_procnum != NQNFSPROC_VACATED)
 668                                         nfsstats.srv_errs++;
 669                                 nfsrv_updatecache(nd, FALSE, mreq);
 670                                 if (nd->nd_nam2)
 671                                         FREE(nd->nd_nam2, M_SONAME);
 672                                 break;
 673                         }
 674                         nfsstats.srvrpccnt[nd->nd_procnum]++;
 675                         nfsrv_updatecache(nd, TRUE, mreq);
 676                         nd->nd_mrep = NULL;
 677                         /* FALL THROUGH */
 678                     case RC_REPLY:
 679                         m = mreq;
 680                         siz = 0;
 681                         while (m) {
 682                                 siz += m->m_len;
 683                                 m = m->m_next;
 684                         }
 685                         if (siz <= 0 || siz > NFS_MAXPACKET) {
 686                                 kprintf("mbuf siz=%d\n",siz);
 687                                 panic("Bad nfs svc reply");
 688                         }
 689                         m = mreq;
 690                         m->m_pkthdr.len = siz;
 691                         m->m_pkthdr.rcvif = NULL;
 692                         /*
 693                          * For stream protocols, prepend a Sun RPC
 694                          * Record Mark.
 695                          */
 696                         if (sotype == SOCK_STREAM) {
 697                                 M_PREPEND(m, NFSX_UNSIGNED, MB_WAIT);
 698                                 if (m == NULL) {
 699                                         error = ENOBUFS;
 700                                         goto skip;
 701                                 }
 702                                 *mtod(m, u_int32_t *) = htonl(0x80000000 | siz);
 703                         }
 704                         if (slp->ns_so->so_proto->pr_flags & PR_CONNREQUIRED)
 705                                 (void) nfs_slplock(slp, 1);
 706                         if (slp->ns_flag & SLP_VALID)
 707                             error = nfs_send(slp->ns_so, nd->nd_nam2, m, NULL);
 708                         else {
 709                             error = EPIPE;
 710                             m_freem(m);
 711                         }
 712 skip:
 713                         if (nfsrtton)
 714                                 nfsd_rt(sotype, nd, cacherep);
 715                         if (nd->nd_nam2)
 716                                 FREE(nd->nd_nam2, M_SONAME);
 717                         if (nd->nd_mrep)
 718                                 m_freem(nd->nd_mrep);
 719                         if (error == EPIPE || error == ENOBUFS)
 720                                 nfsrv_zapsock(slp);
 721                         if (slp->ns_so->so_proto->pr_flags & PR_CONNREQUIRED)
 722                                 nfs_slpunlock(slp);
 723                         if (error == EINTR || error == ERESTART) {
 724                                 kfree((caddr_t)nd, M_NFSRVDESC);
 725                                 lwkt_reltoken(&slp->ns_token);
 726                                 lwkt_gettoken(&nfs_token);
 727                                 nfsd->nfsd_slp = NULL;
 728                                 nfsrv_slpderef(slp);
 729                                 goto done;
 730                         }
 731                         break;
 732                     case RC_DROPIT:
 733                         if (nfsrtton)
 734                                 nfsd_rt(sotype, nd, cacherep);
 735                         m_freem(nd->nd_mrep);
 736                         if (nd->nd_nam2)
 737                                 FREE(nd->nd_nam2, M_SONAME);
 738                         break;
 739                     };
 740                     if (nd) {
 741                         FREE((caddr_t)nd, M_NFSRVDESC);
 742                         nd = NULL;
 743                     }
 744
 745                     /*
 746                      * Check to see if there are outstanding writes that
 747                      * need to be serviced.
 748                      */
 749                     cur_usec = nfs_curusec();
 750                     if (slp->ns_tq.lh_first &&
 751                         slp->ns_tq.lh_first->nd_time <= cur_usec) {
 752                         cacherep = RC_DOIT;
 753                         writes_todo = 1;
 754                     } else {
 755                         writes_todo = 0;
 756                     }
 757                 } while (writes_todo);
 758
 759                 /*
 760                  * nfs_token not held here.  slp token is held.
 761                  */
 762                 if (nfsrv_dorec(slp, nfsd, &nd)) {
 763                         nfsd->nfsd_flag &= ~NFSD_REQINPROG;
 764                         if (slp->ns_flag & SLP_ACTION_MASK) {
 765                                 lwkt_reltoken(&slp->ns_token);
 766                                 lwkt_gettoken(&nfs_token);
 767                         } else {
 768                                 nfsd->nfsd_slp = NULL;
 769                                 lwkt_reltoken(&slp->ns_token);
 770                                 lwkt_gettoken(&nfs_token);
 771                                 nfsrv_slpderef(slp);
 772                         }
 773                 } else {
 774                         lwkt_reltoken(&slp->ns_token);
 775                         lwkt_gettoken(&nfs_token);
 776                 }
 777         }
 778 done:
 779         TAILQ_REMOVE(&nfsd_head, nfsd, nfsd_chain);
 780         kfree((caddr_t)nfsd, M_NFSD);
 781         nsd->nsd_nfsd = NULL;
 782         if (--nfs_numnfsd == 0)
 783                 nfsrv_init(TRUE);       /* Reinitialize everything */
 784
 785         lwkt_reltoken(&nfs_token);
 786         return (error);
 787 }
 788
 789 /*
 790  * Shut down a socket associated with an nfssvc_sock structure.
 791  * Should be called with the send lock set, if required.
 792  * The trick here is to increment the sref at the start, so that the nfsds
 793  * will stop using it and clear ns_flag at the end so that it will not be
 794  * reassigned during cleanup.
 795  */
 796 static void
 797 nfsrv_zapsock(struct nfssvc_sock *slp)
 798 {
 799         struct nfsuid *nuidp, *nnuidp;
 800         struct nfsrv_descript *nwp, *nnwp;
 801         struct socket *so;
 802         struct file *fp;
 803         struct nfsrv_rec *rec;
 804
 805         slp->ns_flag &= ~SLP_ALLFLAGS;
 806         fp = slp->ns_fp;
 807         if (fp) {
 808                 slp->ns_fp = NULL;
 809                 so = slp->ns_so;
 810                 atomic_clear_int(&so->so_rcv.ssb_flags, SSB_UPCALL);
 811                 so->so_upcall = NULL;
 812                 so->so_upcallarg = NULL;
 813                 soshutdown(so, SHUT_RDWR);
 814                 closef(fp, NULL);
 815                 if (slp->ns_nam)
 816                         FREE(slp->ns_nam, M_SONAME);
 817                 m_freem(slp->ns_raw);
 818                 while ((rec = STAILQ_FIRST(&slp->ns_rec)) != NULL) {
 819                         --slp->ns_numrec;
 820                         STAILQ_REMOVE_HEAD(&slp->ns_rec, nr_link);
 821                         if (rec->nr_address)
 822                                 FREE(rec->nr_address, M_SONAME);
 823                         m_freem(rec->nr_packet);
 824                         kfree(rec, M_NFSRVDESC);
 825                 }
 826                 KKASSERT(slp->ns_numrec == 0);
 827
 828                 TAILQ_FOREACH_MUTABLE(nuidp, &slp->ns_uidlruhead, nu_lru,
 829                                       nnuidp) {
 830                         LIST_REMOVE(nuidp, nu_hash);
 831                         TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, nu_lru);
 832                         if (nuidp->nu_flag & NU_NAM)
 833                                 FREE(nuidp->nu_nam, M_SONAME);
 834                         kfree((caddr_t)nuidp, M_NFSUID);
 835                 }
 836                 crit_enter();
 837                 for (nwp = slp->ns_tq.lh_first; nwp; nwp = nnwp) {
 838                         nnwp = nwp->nd_tq.le_next;
 839                         LIST_REMOVE(nwp, nd_tq);
 840                         kfree((caddr_t)nwp, M_NFSRVDESC);
 841                 }
 842                 LIST_INIT(&slp->ns_tq);
 843                 crit_exit();
 844                 nfsrv_slpderef(slp);
 845         }
 846 }
 847
 848 /*
 849  * Derefence a server socket structure. If it has no more references and
 850  * is no longer valid, you can throw it away.
 851  *
 852  * Must be holding nfs_token!
 853  */
 854 void
 855 nfsrv_slpderef(struct nfssvc_sock *slp)
 856 {
 857         ASSERT_LWKT_TOKEN_HELD(&nfs_token);
 858         if (slp->ns_sref == 1) {
 859                 KKASSERT((slp->ns_flag & SLP_VALID) == 0);
 860                 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain);
 861                 slp->ns_sref = 0;
 862                 kfree((caddr_t)slp, M_NFSSVC);
 863         } else {
 864                 --slp->ns_sref;
 865         }
 866 }
 867
 868 void
 869 nfsrv_slpref(struct nfssvc_sock *slp)
 870 {
 871         ASSERT_LWKT_TOKEN_HELD(&nfs_token);
 872         ++slp->ns_sref;
 873 }
 874
 875 /*
 876  * Lock a socket against others.
 877  *
 878  * Returns 0 on failure, 1 on success.
 879  */
 880 int
 881 nfs_slplock(struct nfssvc_sock *slp, int wait)
 882 {
 883         mtx_t mtx = &slp->ns_solock;
 884
 885         if (wait) {
 886                 mtx_lock_ex(mtx, "nfsslplck", 0, 0);
 887                 return(1);
 888         } else if (mtx_lock_ex_try(mtx) == 0) {
 889                 return(1);
 890         } else {
 891                 return(0);
 892         }
 893 }
 894
 895 /*
 896  * Unlock the stream socket for others.
 897  */
 898 void
 899 nfs_slpunlock(struct nfssvc_sock *slp)
 900 {
 901         mtx_t mtx = &slp->ns_solock;
 902
 903         mtx_unlock(mtx);
 904 }
 905
 906 /*
 907  * Initialize the data structures for the server.
 908  * Handshake with any new nfsds starting up to avoid any chance of
 909  * corruption.
 910  */
 911 void
 912 nfsrv_init(int terminating)
 913 {
 914         struct nfssvc_sock *slp, *nslp;
 915
 916         lwkt_gettoken(&nfs_token);
 917         if (nfssvc_sockhead_flag & SLP_INIT)
 918                 panic("nfsd init");
 919         nfssvc_sockhead_flag |= SLP_INIT;
 920
 921         if (terminating) {
 922                 TAILQ_FOREACH_MUTABLE(slp, &nfssvc_sockhead, ns_chain, nslp) {
 923                         if (slp->ns_flag & SLP_VALID)
 924                                 nfsrv_zapsock(slp);
 925                         /*
 926                         TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain);
 927                         kfree((caddr_t)slp, M_NFSSVC);
 928                         */
 929                 }
 930                 nfsrv_cleancache();     /* And clear out server cache */
 931         } else {
 932                 nfs_pub.np_valid = 0;
 933         }
 934
 935         TAILQ_INIT(&nfssvc_sockhead);
 936         nfssvc_sockhead_flag &= ~SLP_INIT;
 937         if (nfssvc_sockhead_flag & SLP_WANTINIT) {
 938                 nfssvc_sockhead_flag &= ~SLP_WANTINIT;
 939                 wakeup((caddr_t)&nfssvc_sockhead);
 940         }
 941
 942         TAILQ_INIT(&nfsd_head);
 943         nfsd_head_flag &= ~NFSD_CHECKSLP;
 944
 945         lwkt_reltoken(&nfs_token);
 946
 947 #if 0
 948         nfs_udpsock = (struct nfssvc_sock *)
 949             kmalloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK | M_ZERO);
 950         mtx_init(&nfs_udpsock->ns_solock);
 951         STAILQ_INIT(&nfs_udpsock->ns_rec);
 952         TAILQ_INIT(&nfs_udpsock->ns_uidlruhead);
 953         TAILQ_INSERT_HEAD(&nfssvc_sockhead, nfs_udpsock, ns_chain);
 954
 955         nfs_cltpsock = (struct nfssvc_sock *)
 956             kmalloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK | M_ZERO);
 957         mtx_init(&nfs_cltpsock->ns_solock);
 958         STAILQ_INIT(&nfs_cltpsock->ns_rec);
 959         TAILQ_INIT(&nfs_cltpsock->ns_uidlruhead);
 960         TAILQ_INSERT_TAIL(&nfssvc_sockhead, nfs_cltpsock, ns_chain);
 961 #endif
 962 }
 963
 964 /*
 965  * Add entries to the server monitor log.
 966  */
 967 static void
 968 nfsd_rt(int sotype, struct nfsrv_descript *nd, int cacherep)
 969 {
 970         struct drt *rt;
 971
 972         rt = &nfsdrt.drt[nfsdrt.pos];
 973         if (cacherep == RC_DOIT)
 974                 rt->flag = 0;
 975         else if (cacherep == RC_REPLY)
 976                 rt->flag = DRT_CACHEREPLY;
 977         else
 978                 rt->flag = DRT_CACHEDROP;
 979         if (sotype == SOCK_STREAM)
 980                 rt->flag |= DRT_TCP;
 981         if (nd->nd_flag & ND_NFSV3)
 982                 rt->flag |= DRT_NFSV3;
 983         rt->proc = nd->nd_procnum;
 984         if (nd->nd_nam->sa_family == AF_INET)
 985             rt->ipadr = ((struct sockaddr_in *)nd->nd_nam)->sin_addr.s_addr;
 986         else
 987             rt->ipadr = INADDR_ANY;
 988         rt->resptime = nfs_curusec() - (nd->nd_starttime.tv_sec * 1000000 + nd->nd_starttime.tv_usec);
 989         getmicrotime(&rt->tstamp);
 990         nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ;
 991 }
 992 #endif /* NFS_NOSERVER */
 993
 994 /*
 995  * Get an authorization string for the uid by having the mount_nfs sitting
 996  * on this mount point porpous out of the kernel and do it.
 997  */
 998 int
 999 nfs_getauth(struct nfsmount *nmp, struct nfsreq *rep,
1000             struct ucred *cred, char **auth_str, int *auth_len, char *verf_str,
1001             int *verf_len, NFSKERBKEY_T key /* return session key */)
1002 {
1003         int error = 0;
1004
1005         while ((nmp->nm_state & NFSSTA_WAITAUTH) == 0) {
1006                 nmp->nm_state |= NFSSTA_WANTAUTH;
1007                 (void) tsleep((caddr_t)&nmp->nm_authtype, 0,
1008                         "nfsauth1", 2 * hz);
1009                 error = nfs_sigintr(nmp, rep, rep->r_td);
1010                 if (error) {
1011                         nmp->nm_state &= ~NFSSTA_WANTAUTH;
1012                         return (error);
1013                 }
1014         }
1015         nmp->nm_state &= ~(NFSSTA_WAITAUTH | NFSSTA_WANTAUTH);
1016         nmp->nm_authstr = *auth_str = (char *)kmalloc(RPCAUTH_MAXSIZ, M_TEMP, M_WAITOK);
1017         nmp->nm_authlen = RPCAUTH_MAXSIZ;
1018         nmp->nm_verfstr = verf_str;
1019         nmp->nm_verflen = *verf_len;
1020         nmp->nm_authuid = cred->cr_uid;
1021         wakeup((caddr_t)&nmp->nm_authstr);
1022
1023         /*
1024          * And wait for mount_nfs to do its stuff.
1025          */
1026         while ((nmp->nm_state & NFSSTA_HASAUTH) == 0 && error == 0) {
1027                 (void) tsleep((caddr_t)&nmp->nm_authlen, 0,
1028                         "nfsauth2", 2 * hz);
1029                 error = nfs_sigintr(nmp, rep, rep->r_td);
1030         }
1031         if (nmp->nm_state & NFSSTA_AUTHERR) {
1032                 nmp->nm_state &= ~NFSSTA_AUTHERR;
1033                 error = EAUTH;
1034         }
1035         if (error)
1036                 kfree((caddr_t)*auth_str, M_TEMP);
1037         else {
1038                 *auth_len = nmp->nm_authlen;
1039                 *verf_len = nmp->nm_verflen;
1040                 bcopy((caddr_t)nmp->nm_key, (caddr_t)key, sizeof (key));
1041         }
1042         nmp->nm_state &= ~NFSSTA_HASAUTH;
1043         nmp->nm_state |= NFSSTA_WAITAUTH;
1044         if (nmp->nm_state & NFSSTA_WANTAUTH) {
1045                 nmp->nm_state &= ~NFSSTA_WANTAUTH;
1046                 wakeup((caddr_t)&nmp->nm_authtype);
1047         }
1048         return (error);
1049 }
1050
1051 /*
1052  * Get a nickname authenticator and verifier.
1053  */
1054 int
1055 nfs_getnickauth(struct nfsmount *nmp, struct ucred *cred, char **auth_str,
1056                 int *auth_len, char *verf_str, int verf_len)
1057 {
1058         struct nfsuid *nuidp;
1059         u_int32_t *nickp, *verfp;
1060         struct timeval ktvin, ktvout;
1061
1062 #ifdef DIAGNOSTIC
1063         if (verf_len < (4 * NFSX_UNSIGNED))
1064                 panic("nfs_getnickauth verf too small");
1065 #endif
1066         for (nuidp = NMUIDHASH(nmp, cred->cr_uid)->lh_first;
1067             nuidp != 0; nuidp = nuidp->nu_hash.le_next) {
1068                 if (nuidp->nu_cr.cr_uid == cred->cr_uid)
1069                         break;
1070         }
1071         if (!nuidp || nuidp->nu_expire < time_second)
1072                 return (EACCES);
1073
1074         /*
1075          * Move to the end of the lru list (end of lru == most recently used).
1076          */
1077         TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru);
1078         TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, nu_lru);
1079
1080         nickp = (u_int32_t *)kmalloc(2 * NFSX_UNSIGNED, M_TEMP, M_WAITOK);
1081         *nickp++ = txdr_unsigned(RPCAKN_NICKNAME);
1082         *nickp = txdr_unsigned(nuidp->nu_nickname);
1083         *auth_str = (char *)nickp;
1084         *auth_len = 2 * NFSX_UNSIGNED;
1085
1086         /*
1087          * Now we must encrypt the verifier and package it up.
1088          */
1089         verfp = (u_int32_t *)verf_str;
1090         *verfp++ = txdr_unsigned(RPCAKN_NICKNAME);
1091         if (time_second > nuidp->nu_timestamp.tv_sec ||
1092             (time_second == nuidp->nu_timestamp.tv_sec &&
1093              time_second > nuidp->nu_timestamp.tv_usec))
1094                 getmicrotime(&nuidp->nu_timestamp);
1095         else
1096                 nuidp->nu_timestamp.tv_usec++;
1097         ktvin.tv_sec = txdr_unsigned(nuidp->nu_timestamp.tv_sec);
1098         ktvin.tv_usec = txdr_unsigned(nuidp->nu_timestamp.tv_usec);
1099
1100         /*
1101          * Now encrypt the timestamp verifier in ecb mode using the session
1102          * key.
1103          */
1104 #ifdef NFSKERB
1105         XXX
1106 #else
1107         ktvout.tv_sec = 0;
1108         ktvout.tv_usec = 0;
1109 #endif
1110
1111         *verfp++ = ktvout.tv_sec;
1112         *verfp++ = ktvout.tv_usec;
1113         *verfp = 0;
1114         return (0);
1115 }
1116
1117 /*
1118  * Save the current nickname in a hash list entry on the mount point.
1119  */
1120 int
1121 nfs_savenickauth(struct nfsmount *nmp, struct ucred *cred, int len,
1122                  NFSKERBKEY_T key, struct mbuf **mdp, char **dposp,
1123                  struct mbuf *mrep)
1124 {
1125         struct nfsuid *nuidp;
1126         u_int32_t *tl;
1127         struct timeval ktvin, ktvout;
1128         u_int32_t nick;
1129         int deltasec, error = 0;
1130         struct nfsm_info info;
1131
1132         info.md = *mdp;
1133         info.dpos = *dposp;
1134         info.mrep = mrep;
1135
1136         if (len == (3 * NFSX_UNSIGNED)) {
1137                 NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED));
1138                 ktvin.tv_sec = *tl++;
1139                 ktvin.tv_usec = *tl++;
1140                 nick = fxdr_unsigned(u_int32_t, *tl);
1141
1142                 /*
1143                  * Decrypt the timestamp in ecb mode.
1144                  */
1145 #ifdef NFSKERB
1146                 XXX
1147 #else
1148                 ktvout.tv_sec = 0;
1149                 ktvout.tv_usec = 0;
1150 #endif
1151                 ktvout.tv_sec = fxdr_unsigned(long, ktvout.tv_sec);
1152                 ktvout.tv_usec = fxdr_unsigned(long, ktvout.tv_usec);
1153                 deltasec = time_second - ktvout.tv_sec;
1154                 if (deltasec < 0)
1155                         deltasec = -deltasec;
1156                 /*
1157                  * If ok, add it to the hash list for the mount point.
1158                  */
1159                 if (deltasec <= NFS_KERBCLOCKSKEW) {
1160                         if (nmp->nm_numuids < nuidhash_max) {
1161                                 nmp->nm_numuids++;
1162                                 nuidp = (struct nfsuid *)
1163                                    kmalloc(sizeof (struct nfsuid), M_NFSUID,
1164                                         M_WAITOK);
1165                         } else {
1166                                 nuidp = TAILQ_FIRST(&nmp->nm_uidlruhead);
1167                                 LIST_REMOVE(nuidp, nu_hash);
1168                                 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp,
1169                                         nu_lru);
1170                         }
1171                         nuidp->nu_flag = 0;
1172                         nuidp->nu_cr.cr_uid = cred->cr_uid;
1173                         nuidp->nu_expire = time_second + NFS_KERBTTL;
1174                         nuidp->nu_timestamp = ktvout;
1175                         nuidp->nu_nickname = nick;
1176                         bcopy(key, nuidp->nu_key, sizeof (key));
1177                         TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp,
1178                                 nu_lru);
1179                         LIST_INSERT_HEAD(NMUIDHASH(nmp, cred->cr_uid),
1180                                 nuidp, nu_hash);
1181                 }
1182         } else {
1183                 ERROROUT(nfsm_adv(&info, nfsm_rndup(len)));
1184         }
1185 nfsmout:
1186         *mdp = info.md;
1187         *dposp = info.dpos;
1188         return (error);
1189 }