sys/vfs/nfs/nfs_syscalls.c

   1 /*
   2  * Copyright (c) 1989, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Rick Macklem at The University of Guelph.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by the University of
  19  *      California, Berkeley and its contributors.
  20  * 4. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  *
  36  *      @(#)nfs_syscalls.c      8.5 (Berkeley) 3/30/95
  37  * $FreeBSD: src/sys/nfs/nfs_syscalls.c,v 1.58.2.1 2000/11/26 02:30:06 dillon Exp $
  38  * $DragonFly: src/sys/vfs/nfs/nfs_syscalls.c,v 1.31 2008/01/05 14:02:41 swildner Exp $
  39  */
  40
  41 #include <sys/param.h>
  42 #include <sys/systm.h>
  43 #include <sys/sysproto.h>
  44 #include <sys/kernel.h>
  45 #include <sys/sysctl.h>
  46 #include <sys/file.h>
  47 #include <sys/filedesc.h>
  48 #include <sys/vnode.h>
  49 #include <sys/malloc.h>
  50 #include <sys/mount.h>
  51 #include <sys/proc.h>
  52 #include <sys/priv.h>
  53 #include <sys/buf.h>
  54 #include <sys/mbuf.h>
  55 #include <sys/resourcevar.h>
  56 #include <sys/socket.h>
  57 #include <sys/socketvar.h>
  58 #include <sys/domain.h>
  59 #include <sys/protosw.h>
  60 #include <sys/nlookup.h>
  61 #include <vm/vm_zone.h>
  62
  63 #include <sys/mutex2.h>
  64 #include <sys/thread2.h>
  65
  66 #include <netinet/in.h>
  67 #include <netinet/tcp.h>
  68 #include "xdr_subs.h"
  69 #include "rpcv2.h"
  70 #include "nfsproto.h"
  71 #include "nfs.h"
  72 #include "nfsm_subs.h"
  73 #include "nfsrvcache.h"
  74 #include "nfsmount.h"
  75 #include "nfsnode.h"
  76 #include "nfsrtt.h"
  77
  78 #include <sys/thread2.h>
  79
  80 static MALLOC_DEFINE(M_NFSSVC, "NFS srvsock", "Nfs server structure");
  81
  82 static int nuidhash_max = NFS_MAXUIDHASH;
  83
  84 #ifndef NFS_NOSERVER
  85 static void     nfsrv_zapsock (struct nfssvc_sock *slp);
  86 #endif
  87
  88 #define TRUE    1
  89 #define FALSE   0
  90
  91 SYSCTL_DECL(_vfs_nfs);
  92
  93 #ifndef NFS_NOSERVER
  94 int nfsd_waiting = 0;
  95 static struct nfsdrt nfsdrt;
  96 static int nfs_numnfsd = 0;
  97 static void     nfsd_rt (int sotype, struct nfsrv_descript *nd,
  98                              int cacherep);
  99 static int      nfssvc_addsock (struct file *, struct sockaddr *,
 100                                     struct thread *);
 101 static int      nfssvc_nfsd (struct nfsd_srvargs *,caddr_t,struct thread *);
 102
 103 static int nfs_privport = 0;
 104 SYSCTL_INT(_vfs_nfs, NFS_NFSPRIVPORT, nfs_privport, CTLFLAG_RW, &nfs_privport,
 105     0, "Enable privileged source port checks");
 106 SYSCTL_INT(_vfs_nfs, OID_AUTO, gatherdelay, CTLFLAG_RW, &nfsrvw_procrastinate, 0,
 107     "Enable NFS request procrastination");
 108 SYSCTL_INT(_vfs_nfs, OID_AUTO, gatherdelay_v3, CTLFLAG_RW, &nfsrvw_procrastinate_v3, 0,
 109     "Enable NFSv3 request procrastination");
 110 int     nfs_soreserve = NFS_MAXPACKET * NFS_MAXASYNCBIO;
 111 SYSCTL_INT(_vfs_nfs, OID_AUTO, soreserve, CTLFLAG_RW, &nfs_soreserve, 0,
 112     "Minimum NFS socket buffer size reservation");
 113
 114 /*
 115  * NFS server system calls
 116  */
 117
 118 #endif /* NFS_NOSERVER */
 119 /*
 120  * nfssvc_args(int flag, caddr_t argp)
 121  *
 122  * Nfs server psuedo system call for the nfsd's
 123  * Based on the flag value it either:
 124  * - adds a socket to the selection list
 125  * - remains in the kernel as an nfsd
 126  * - remains in the kernel as an nfsiod
 127  *
 128  * MPALMOSTSAFE
 129  */
 130 int
 131 sys_nfssvc(struct nfssvc_args *uap)
 132 {
 133 #ifndef NFS_NOSERVER
 134         struct nlookupdata nd;
 135         struct file *fp;
 136         struct sockaddr *nam;
 137         struct nfsd_args nfsdarg;
 138         struct nfsd_srvargs nfsd_srvargs, *nsd = &nfsd_srvargs;
 139         struct nfsd_cargs ncd;
 140         struct nfsd *nfsd;
 141         struct nfssvc_sock *slp;
 142         struct nfsuid *nuidp;
 143         struct nfsmount *nmp;
 144         struct vnode *vp;
 145 #endif /* NFS_NOSERVER */
 146         int error;
 147         struct thread *td = curthread;
 148
 149         /*
 150          * Must be super user
 151          */
 152         error = priv_check(td, PRIV_ROOT);
 153         if (error)
 154                 return (error);
 155
 156         lwkt_gettoken(&nfs_token);
 157
 158         while (nfssvc_sockhead_flag & SLP_INIT) {
 159                 nfssvc_sockhead_flag |= SLP_WANTINIT;
 160                 tsleep((caddr_t)&nfssvc_sockhead, 0, "nfsd init", 0);
 161         }
 162         if (uap->flag & NFSSVC_BIOD)
 163                 error = ENXIO;          /* no longer need nfsiod's */
 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                         goto done;
 172                 vp = NULL;
 173                 error = nlookup_init(&nd, ncd.ncd_dirp, UIO_USERSPACE,
 174                                         NLC_FOLLOW);
 175                 if (error == 0)
 176                         error = nlookup(&nd);
 177                 if (error == 0)
 178                         error = cache_vget(&nd.nl_nch, nd.nl_cred, LK_EXCLUSIVE, &vp);
 179                 nlookup_done(&nd);
 180                 if (error)
 181                         goto done;
 182
 183                 if ((vp->v_flag & VROOT) == 0)
 184                         error = EINVAL;
 185                 nmp = VFSTONFS(vp->v_mount);
 186                 vput(vp);
 187                 if (error)
 188                         goto done;
 189                 if ((nmp->nm_state & NFSSTA_MNTD) &&
 190                         (uap->flag & NFSSVC_GOTAUTH) == 0) {
 191                         error = 0;
 192                         goto done;
 193                 }
 194                 nmp->nm_state |= NFSSTA_MNTD;
 195                 error = nfs_clientd(nmp, td->td_ucred, &ncd, uap->flag,
 196                                     uap->argp, td);
 197         } else if (uap->flag & NFSSVC_ADDSOCK) {
 198                 error = copyin(uap->argp, (caddr_t)&nfsdarg, sizeof(nfsdarg));
 199                 if (error)
 200                         goto done;
 201                 error = holdsock(td->td_proc->p_fd, nfsdarg.sock, &fp);
 202                 if (error)
 203                         goto done;
 204                 /*
 205                  * Get the client address for connected sockets.
 206                  */
 207                 if (nfsdarg.name == NULL || nfsdarg.namelen == 0)
 208                         nam = NULL;
 209                 else {
 210                         error = getsockaddr(&nam, nfsdarg.name,
 211                                             nfsdarg.namelen);
 212                         if (error) {
 213                                 fdrop(fp);
 214                                 goto done;
 215                         }
 216                 }
 217                 error = nfssvc_addsock(fp, nam, td);
 218                 fdrop(fp);
 219         } else {
 220                 error = copyin(uap->argp, (caddr_t)nsd, sizeof (*nsd));
 221                 if (error)
 222                         goto done;
 223                 if ((uap->flag & NFSSVC_AUTHIN) &&
 224                     ((nfsd = nsd->nsd_nfsd)) != NULL &&
 225                     (nfsd->nfsd_slp->ns_flag & SLP_VALID)) {
 226                         slp = nfsd->nfsd_slp;
 227
 228                         /*
 229                          * First check to see if another nfsd has already
 230                          * added this credential.
 231                          */
 232                         for (nuidp = NUIDHASH(slp,nsd->nsd_cr.cr_uid)->lh_first;
 233                             nuidp != 0; nuidp = nuidp->nu_hash.le_next) {
 234                                 if (nuidp->nu_cr.cr_uid == nsd->nsd_cr.cr_uid &&
 235                                     (!nfsd->nfsd_nd->nd_nam2 ||
 236                                      netaddr_match(NU_NETFAM(nuidp),
 237                                      &nuidp->nu_haddr, nfsd->nfsd_nd->nd_nam2)))
 238                                         break;
 239                         }
 240                         if (nuidp) {
 241                             nfsrv_setcred(&nuidp->nu_cr,&nfsd->nfsd_nd->nd_cr);
 242                             nfsd->nfsd_nd->nd_flag |= ND_KERBFULL;
 243                         } else {
 244                             /*
 245                              * Nope, so we will.
 246                              */
 247                             if (slp->ns_numuids < nuidhash_max) {
 248                                 slp->ns_numuids++;
 249                                 nuidp = (struct nfsuid *)
 250                                    kmalloc(sizeof (struct nfsuid), M_NFSUID,
 251                                         M_WAITOK);
 252                             } else
 253                                 nuidp = NULL;
 254                             if ((slp->ns_flag & SLP_VALID) == 0) {
 255                                 if (nuidp)
 256                                     kfree((caddr_t)nuidp, M_NFSUID);
 257                             } else {
 258                                 if (nuidp == NULL) {
 259                                     nuidp = TAILQ_FIRST(&slp->ns_uidlruhead);
 260                                     LIST_REMOVE(nuidp, nu_hash);
 261                                     TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp,
 262                                         nu_lru);
 263                                     if (nuidp->nu_flag & NU_NAM)
 264                                         FREE(nuidp->nu_nam, M_SONAME);
 265                                 }
 266                                 nuidp->nu_flag = 0;
 267                                 nuidp->nu_cr = nsd->nsd_cr;
 268                                 if (nuidp->nu_cr.cr_ngroups > NGROUPS)
 269                                     nuidp->nu_cr.cr_ngroups = NGROUPS;
 270                                 nuidp->nu_cr.cr_ref = 1;
 271                                 nuidp->nu_timestamp = nsd->nsd_timestamp;
 272                                 nuidp->nu_expire = time_second + nsd->nsd_ttl;
 273                                 /*
 274                                  * and save the session key in nu_key.
 275                                  */
 276                                 bcopy(nsd->nsd_key, nuidp->nu_key,
 277                                     sizeof (nsd->nsd_key));
 278                                 if (nfsd->nfsd_nd->nd_nam2) {
 279                                     struct sockaddr_in *saddr;
 280
 281                                     saddr = (struct sockaddr_in *)
 282                                             nfsd->nfsd_nd->nd_nam2;
 283                                     switch (saddr->sin_family) {
 284                                     case AF_INET:
 285                                         nuidp->nu_flag |= NU_INETADDR;
 286                                         nuidp->nu_inetaddr =
 287                                              saddr->sin_addr.s_addr;
 288                                         break;
 289                                     case AF_ISO:
 290                                     default:
 291                                         nuidp->nu_flag |= NU_NAM;
 292                                         nuidp->nu_nam =
 293                                           dup_sockaddr(nfsd->nfsd_nd->nd_nam2);
 294                                         break;
 295                                     };
 296                                 }
 297                                 TAILQ_INSERT_TAIL(&slp->ns_uidlruhead, nuidp,
 298                                         nu_lru);
 299                                 LIST_INSERT_HEAD(NUIDHASH(slp, nsd->nsd_uid),
 300                                         nuidp, nu_hash);
 301                                 nfsrv_setcred(&nuidp->nu_cr,
 302                                     &nfsd->nfsd_nd->nd_cr);
 303                                 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL;
 304                             }
 305                         }
 306                 }
 307                 if ((uap->flag & NFSSVC_AUTHINFAIL) && (nfsd = nsd->nsd_nfsd))
 308                         nfsd->nfsd_flag |= NFSD_AUTHFAIL;
 309                 error = nfssvc_nfsd(nsd, uap->argp, td);
 310         }
 311 #endif /* NFS_NOSERVER */
 312         if (error == EINTR || error == ERESTART)
 313                 error = 0;
 314 done:
 315         lwkt_reltoken(&nfs_token);
 316         return (error);
 317 }
 318
 319 #ifndef NFS_NOSERVER
 320 /*
 321  * Adds a socket to the list for servicing by nfsds.
 322  */
 323 static int
 324 nfssvc_addsock(struct file *fp, struct sockaddr *mynam, struct thread *td)
 325 {
 326         int siz;
 327         struct nfssvc_sock *slp;
 328         struct socket *so;
 329         int error;
 330
 331         so = (struct socket *)fp->f_data;
 332 #if 0
 333         tslp = NULL;
 334         /*
 335          * Add it to the list, as required.
 336          */
 337         if (so->so_proto->pr_protocol == IPPROTO_UDP) {
 338                 tslp = nfs_udpsock;
 339                 if (tslp->ns_flag & SLP_VALID) {
 340                         if (mynam != NULL)
 341                                 FREE(mynam, M_SONAME);
 342                         return (EPERM);
 343                 }
 344         }
 345 #endif
 346         /*
 347          * Reserve buffer space in the socket.  Note that due to bugs in
 348          * Linux's delayed-ack code, serious performance degredation may
 349          * occur with linux hosts if the minimum is used.
 350          *
 351          * NFS sockets are not limited to the standard sb_max or by
 352          * resource limits.
 353          */
 354         if (so->so_type == SOCK_STREAM)
 355                 siz = NFS_MAXPACKET + sizeof (u_long);
 356         else
 357                 siz = NFS_MAXPACKET;
 358         if (siz < nfs_soreserve)
 359             siz = nfs_soreserve;
 360
 361         error = soreserve(so, siz, siz, NULL);
 362         if (error) {
 363                 if (mynam != NULL)
 364                         FREE(mynam, M_SONAME);
 365                 return (error);
 366         }
 367
 368         /*
 369          * Set protocol specific options { for now TCP only } and
 370          * reserve some space. For datagram sockets, this can get called
 371          * repeatedly for the same socket, but that isn't harmful.
 372          */
 373         if (so->so_type == SOCK_STREAM) {
 374                 struct sockopt sopt;
 375                 int val;
 376
 377                 bzero(&sopt, sizeof sopt);
 378                 sopt.sopt_level = SOL_SOCKET;
 379                 sopt.sopt_name = SO_KEEPALIVE;
 380                 sopt.sopt_val = &val;
 381                 sopt.sopt_valsize = sizeof val;
 382                 val = 1;
 383                 sosetopt(so, &sopt);
 384         }
 385         if (so->so_proto->pr_domain->dom_family == AF_INET &&
 386             so->so_proto->pr_protocol == IPPROTO_TCP) {
 387                 struct sockopt sopt;
 388                 int val;
 389
 390                 bzero(&sopt, sizeof sopt);
 391                 sopt.sopt_level = IPPROTO_TCP;
 392                 sopt.sopt_name = TCP_NODELAY;
 393                 sopt.sopt_val = &val;
 394                 sopt.sopt_valsize = sizeof val;
 395                 val = 1;
 396                 sosetopt(so, &sopt);
 397
 398                 bzero(&sopt, sizeof sopt);
 399                 sopt.sopt_level = IPPROTO_TCP;
 400                 sopt.sopt_name = TCP_FASTKEEP;
 401                 sopt.sopt_val = &val;
 402                 sopt.sopt_valsize = sizeof val;
 403                 val = 1;
 404                 sosetopt(so, &sopt);
 405         }
 406         atomic_clear_int(&so->so_rcv.ssb_flags, SSB_NOINTR);
 407         so->so_rcv.ssb_timeo = 0;
 408         atomic_clear_int(&so->so_snd.ssb_flags, SSB_NOINTR);
 409         so->so_snd.ssb_timeo = 0;
 410
 411         slp = kmalloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK | M_ZERO);
 412         mtx_init(&slp->ns_solock);
 413         STAILQ_INIT(&slp->ns_rec);
 414         TAILQ_INIT(&slp->ns_uidlruhead);
 415         lwkt_token_init(&slp->ns_token, 1, "nfssrv_token");
 416
 417         lwkt_gettoken(&nfs_token);
 418         nfsrv_slpref(slp);
 419         TAILQ_INSERT_TAIL(&nfssvc_sockhead, slp, ns_chain);
 420         lwkt_gettoken(&slp->ns_token);
 421
 422         slp->ns_so = so;
 423         slp->ns_nam = mynam;
 424         fp->f_count++;
 425         slp->ns_fp = fp;
 426
 427         so->so_upcallarg = (caddr_t)slp;
 428         so->so_upcall = nfsrv_rcv_upcall;
 429         atomic_set_int(&so->so_rcv.ssb_flags, SSB_UPCALL);
 430         slp->ns_flag = (SLP_VALID | SLP_NEEDQ);
 431         nfsrv_wakenfsd(slp, 1);
 432
 433         lwkt_reltoken(&slp->ns_token);
 434         lwkt_reltoken(&nfs_token);
 435
 436         return (0);
 437 }
 438
 439 /*
 440  * Called by nfssvc() for nfsds. Just loops around servicing rpc requests
 441  * until it is killed by a signal.
 442  */
 443 static int
 444 nfssvc_nfsd(struct nfsd_srvargs *nsd, caddr_t argp, struct thread *td)
 445 {
 446         int siz;
 447         struct nfssvc_sock *slp;
 448         struct nfsd *nfsd = nsd->nsd_nfsd;
 449         struct nfsrv_descript *nd = NULL;
 450         struct mbuf *m, *mreq;
 451         int error, cacherep, sotype, writes_todo;
 452         int procrastinate;
 453         u_quad_t cur_usec;
 454
 455 #ifndef nolint
 456         cacherep = RC_DOIT;
 457         writes_todo = 0;
 458 #endif
 459         lwkt_gettoken(&nfs_token);
 460
 461         if (nfsd == NULL) {
 462                 nsd->nsd_nfsd = nfsd = (struct nfsd *)
 463                         kmalloc(sizeof (struct nfsd), M_NFSD, M_WAITOK|M_ZERO);
 464                 nfsd->nfsd_td = td;
 465                 TAILQ_INSERT_TAIL(&nfsd_head, nfsd, nfsd_chain);
 466                 nfs_numnfsd++;
 467         }
 468
 469         /*
 470          * Loop getting rpc requests until SIGKILL.
 471          */
 472         for (;;) {
 473                 if ((nfsd->nfsd_flag & NFSD_REQINPROG) == 0) {
 474                         while (nfsd->nfsd_slp == NULL &&
 475                             (nfsd_head_flag & NFSD_CHECKSLP) == 0) {
 476                                 nfsd->nfsd_flag |= NFSD_WAITING;
 477                                 nfsd_waiting++;
 478                                 error = tsleep(nfsd, PCATCH, "nfsd", 0);
 479                                 nfsd_waiting--;
 480                                 if (error && nfsd->nfsd_slp == NULL)
 481                                         goto done;
 482                         }
 483                         if (nfsd->nfsd_slp == NULL &&
 484                             (nfsd_head_flag & NFSD_CHECKSLP)) {
 485                                 TAILQ_FOREACH(slp, &nfssvc_sockhead, ns_chain) {
 486                                     if ((slp->ns_flag & SLP_ACTION_MASK) ||
 487                                         slp->ns_needq_upcall) {
 488                                             nfsrv_slpref(slp);
 489                                             nfsd->nfsd_slp = slp;
 490                                             break;
 491                                     }
 492                                 }
 493                                 if (slp == NULL)
 494                                         nfsd_head_flag &= ~NFSD_CHECKSLP;
 495                         }
 496                         if ((slp = nfsd->nfsd_slp) == NULL)
 497                                 continue;
 498
 499                         lwkt_reltoken(&nfs_token);
 500                         lwkt_gettoken(&slp->ns_token);
 501
 502                         if (slp->ns_needq_upcall) {
 503                                 slp->ns_needq_upcall = 0;
 504                                 slp->ns_flag |= SLP_NEEDQ;
 505                         }
 506
 507                         if (slp->ns_flag & SLP_VALID) {
 508                                 /*
 509                                  * We can both process additional received
 510                                  * data into new records and process existing
 511                                  * records.  This keeps the pipeline hot by
 512                                  * allowing the tcp socket to continue to
 513                                  * drain while we are processing records.
 514                                  */
 515                                 if (slp->ns_flag & SLP_DISCONN) {
 516                                         nfsrv_zapsock(slp);
 517                                 } else if (slp->ns_flag & SLP_NEEDQ) {
 518                                         (void)nfs_slplock(slp, 1);
 519                                         nfsrv_rcv(slp->ns_so, (caddr_t)slp,
 520                                                   MB_WAIT);
 521                                         nfs_slpunlock(slp);
 522                                 }
 523                                 error = nfsrv_dorec(slp, nfsd, &nd);
 524                                 cur_usec = nfs_curusec();
 525                                 if (error && slp->ns_tq.lh_first &&
 526                                     slp->ns_tq.lh_first->nd_time <= cur_usec) {
 527                                         error = 0;
 528                                         cacherep = RC_DOIT;
 529                                         writes_todo = 1;
 530                                 } else {
 531                                         writes_todo = 0;
 532                                 }
 533                                 nfsd->nfsd_flag |= NFSD_REQINPROG;
 534                         } else {
 535                                 slp->ns_flag &= ~SLP_ACTION_MASK;
 536                                 error = 0;
 537                         }
 538                 } else {
 539                         error = 0;
 540                         slp = nfsd->nfsd_slp;
 541
 542                         lwkt_reltoken(&nfs_token);
 543                         lwkt_gettoken(&slp->ns_token);
 544
 545                         if (slp->ns_needq_upcall) {
 546                                 slp->ns_needq_upcall = 0;
 547                                 slp->ns_flag |= SLP_NEEDQ;
 548                         }
 549                         if (NFSRV_RECLIMIT(slp) == 0 &&
 550                             (slp->ns_flag & SLP_NEEDQ)) {
 551                                 (void)nfs_slplock(slp, 1);
 552                                 nfsrv_rcv(slp->ns_so, (caddr_t)slp,
 553                                           MB_WAIT);
 554                                 nfs_slpunlock(slp);
 555                         }
 556                 }
 557
 558                 /*
 559                  * nfs_token not held here.  slp token is held.
 560                  */
 561                 if (error || (slp->ns_flag & SLP_VALID) == 0) {
 562                         if (nd) {
 563                                 kfree((caddr_t)nd, M_NFSRVDESC);
 564                                 nd = NULL;
 565                         }
 566                         nfsd->nfsd_flag &= ~NFSD_REQINPROG;
 567                         if (slp->ns_flag & SLP_ACTION_MASK) {
 568                                 lwkt_reltoken(&slp->ns_token);
 569                                 lwkt_gettoken(&nfs_token);
 570                         } else {
 571                                 nfsd->nfsd_slp = NULL;
 572                                 lwkt_reltoken(&slp->ns_token);
 573                                 lwkt_gettoken(&nfs_token);
 574                                 nfsrv_slpderef(slp);
 575                         }
 576                         continue;
 577                 }
 578
 579                 /*
 580                  * Execute the NFS request - handle the server side cache
 581                  *
 582                  * nfs_token not held here.  slp token is held.
 583                  */
 584                 sotype = slp->ns_so->so_type;
 585                 if (nd) {
 586                     getmicrotime(&nd->nd_starttime);
 587                     if (nd->nd_nam2)
 588                         nd->nd_nam = nd->nd_nam2;
 589                     else
 590                         nd->nd_nam = slp->ns_nam;
 591
 592                     /*
 593                      * Check to see if authorization is needed.
 594                      */
 595                     if (nfsd->nfsd_flag & NFSD_NEEDAUTH) {
 596                         nfsd->nfsd_flag &= ~NFSD_NEEDAUTH;
 597                         nsd->nsd_haddr =
 598                                 ((struct sockaddr_in *)
 599                                  nd->nd_nam)->sin_addr.s_addr;
 600                         nsd->nsd_authlen = nfsd->nfsd_authlen;
 601                         nsd->nsd_verflen = nfsd->nfsd_verflen;
 602                         if (!copyout(nfsd->nfsd_authstr,nsd->nsd_authstr,
 603                                 nfsd->nfsd_authlen) &&
 604                             !copyout(nfsd->nfsd_verfstr, nsd->nsd_verfstr,
 605                                 nfsd->nfsd_verflen) &&
 606                             !copyout((caddr_t)nsd, argp, sizeof (*nsd)))
 607                             lwkt_reltoken(&slp->ns_token);
 608                             return (ENEEDAUTH);
 609                         cacherep = RC_DROPIT;
 610                     } else {
 611                         cacherep = nfsrv_getcache(nd, slp, &mreq);
 612                     }
 613
 614                     if (nfsd->nfsd_flag & NFSD_AUTHFAIL) {
 615                         nfsd->nfsd_flag &= ~NFSD_AUTHFAIL;
 616                         nd->nd_procnum = NFSPROC_NOOP;
 617                         nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
 618                         cacherep = RC_DOIT;
 619                     } else if (nfs_privport) {
 620                         /* Check if source port is privileged */
 621                         u_short port;
 622                         struct sockaddr *nam = nd->nd_nam;
 623                         struct sockaddr_in *sin;
 624
 625                         sin = (struct sockaddr_in *)nam;
 626                         port = ntohs(sin->sin_port);
 627                         if (port >= IPPORT_RESERVED &&
 628                             nd->nd_procnum != NFSPROC_NULL) {
 629                             nd->nd_procnum = NFSPROC_NOOP;
 630                             nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
 631                             cacherep = RC_DOIT;
 632                             kprintf("NFS request from unprivileged port (%s:%d)\n",
 633                                    inet_ntoa(sin->sin_addr), port);
 634                         }
 635                     }
 636
 637                 }
 638
 639                 /*
 640                  * Execute the NFS request - direct execution
 641                  *
 642                  * Loop to get all the write rpc replies that have been
 643                  * gathered together.
 644                  *
 645                  * nfs_token not held here.  slp token is held.
 646                  */
 647                 do {
 648                     switch (cacherep) {
 649                     case RC_DOIT:
 650                         if (nd && (nd->nd_flag & ND_NFSV3))
 651                             procrastinate = nfsrvw_procrastinate_v3;
 652                         else
 653                             procrastinate = nfsrvw_procrastinate;
 654                         if (writes_todo || (nd->nd_procnum == NFSPROC_WRITE &&
 655                             procrastinate > 0)
 656                         ) {
 657                             error = nfsrv_writegather(&nd, slp,
 658                                                       nfsd->nfsd_td, &mreq);
 659                         } else {
 660                             /* NOT YET lwkt_reltoken(&slp->ns_token); */
 661                             error = (*(nfsrv3_procs[nd->nd_procnum]))(nd,
 662                                                 slp, nfsd->nfsd_td, &mreq);
 663                             /* NOT YET lwkt_gettoken(&slp->ns_token); */
 664                         }
 665                         if (mreq == NULL)
 666                                 break;
 667                         if (error != 0 && error != NFSERR_RETVOID) {
 668                                 if (nd->nd_procnum != NQNFSPROC_VACATED)
 669                                         nfsstats.srv_errs++;
 670                                 nfsrv_updatecache(nd, FALSE, mreq);
 671                                 if (nd->nd_nam2)
 672                                         FREE(nd->nd_nam2, M_SONAME);
 673                                 break;
 674                         }
 675                         nfsstats.srvrpccnt[nd->nd_procnum]++;
 676                         nfsrv_updatecache(nd, TRUE, mreq);
 677                         nd->nd_mrep = NULL;
 678                         /* FALL THROUGH */
 679                     case RC_REPLY:
 680                         m = mreq;
 681                         siz = 0;
 682                         while (m) {
 683                                 siz += m->m_len;
 684                                 m = m->m_next;
 685                         }
 686                         if (siz <= 0 || siz > NFS_MAXPACKET) {
 687                                 kprintf("mbuf siz=%d\n",siz);
 688                                 panic("Bad nfs svc reply");
 689                         }
 690                         m = mreq;
 691                         m->m_pkthdr.len = siz;
 692                         m->m_pkthdr.rcvif = NULL;
 693                         /*
 694                          * For stream protocols, prepend a Sun RPC
 695                          * Record Mark.
 696                          */
 697                         if (sotype == SOCK_STREAM) {
 698                                 M_PREPEND(m, NFSX_UNSIGNED, MB_WAIT);
 699                                 if (m == NULL) {
 700                                         error = ENOBUFS;
 701                                         goto skip;
 702                                 }
 703                                 *mtod(m, u_int32_t *) = htonl(0x80000000 | siz);
 704                         }
 705                         if (slp->ns_so->so_proto->pr_flags & PR_CONNREQUIRED)
 706                                 (void) nfs_slplock(slp, 1);
 707                         if (slp->ns_flag & SLP_VALID)
 708                             error = nfs_send(slp->ns_so, nd->nd_nam2, m, NULL);
 709                         else {
 710                             error = EPIPE;
 711                             m_freem(m);
 712                         }
 713 skip:
 714                         if (nfsrtton)
 715                                 nfsd_rt(sotype, nd, cacherep);
 716                         if (nd->nd_nam2)
 717                                 FREE(nd->nd_nam2, M_SONAME);
 718                         if (nd->nd_mrep)
 719                                 m_freem(nd->nd_mrep);
 720                         if (error == EPIPE || error == ENOBUFS)
 721                                 nfsrv_zapsock(slp);
 722                         if (slp->ns_so->so_proto->pr_flags & PR_CONNREQUIRED)
 723                                 nfs_slpunlock(slp);
 724                         if (error == EINTR || error == ERESTART) {
 725                                 kfree((caddr_t)nd, M_NFSRVDESC);
 726                                 lwkt_reltoken(&slp->ns_token);
 727                                 lwkt_gettoken(&nfs_token);
 728                                 nfsd->nfsd_slp = NULL;
 729                                 nfsrv_slpderef(slp);
 730                                 goto done;
 731                         }
 732                         break;
 733                     case RC_DROPIT:
 734                         if (nfsrtton)
 735                                 nfsd_rt(sotype, nd, cacherep);
 736                         m_freem(nd->nd_mrep);
 737                         if (nd->nd_nam2)
 738                                 FREE(nd->nd_nam2, M_SONAME);
 739                         break;
 740                     };
 741                     if (nd) {
 742                         FREE((caddr_t)nd, M_NFSRVDESC);
 743                         nd = NULL;
 744                     }
 745
 746                     /*
 747                      * Check to see if there are outstanding writes that
 748                      * need to be serviced.
 749                      */
 750                     cur_usec = nfs_curusec();
 751                     if (slp->ns_tq.lh_first &&
 752                         slp->ns_tq.lh_first->nd_time <= cur_usec) {
 753                         cacherep = RC_DOIT;
 754                         writes_todo = 1;
 755                     } else {
 756                         writes_todo = 0;
 757                     }
 758                 } while (writes_todo);
 759
 760                 /*
 761                  * nfs_token not held here.  slp token is held.
 762                  */
 763                 if (nfsrv_dorec(slp, nfsd, &nd)) {
 764                         nfsd->nfsd_flag &= ~NFSD_REQINPROG;
 765                         if (slp->ns_flag & SLP_ACTION_MASK) {
 766                                 lwkt_reltoken(&slp->ns_token);
 767                                 lwkt_gettoken(&nfs_token);
 768                         } else {
 769                                 nfsd->nfsd_slp = NULL;
 770                                 lwkt_reltoken(&slp->ns_token);
 771                                 lwkt_gettoken(&nfs_token);
 772                                 nfsrv_slpderef(slp);
 773                         }
 774                 } else {
 775                         lwkt_reltoken(&slp->ns_token);
 776                         lwkt_gettoken(&nfs_token);
 777                 }
 778         }
 779 done:
 780         TAILQ_REMOVE(&nfsd_head, nfsd, nfsd_chain);
 781         kfree((caddr_t)nfsd, M_NFSD);
 782         nsd->nsd_nfsd = NULL;
 783         if (--nfs_numnfsd == 0)
 784                 nfsrv_init(TRUE);       /* Reinitialize everything */
 785
 786         lwkt_reltoken(&nfs_token);
 787         return (error);
 788 }
 789
 790 /*
 791  * Shut down a socket associated with an nfssvc_sock structure.
 792  * Should be called with the send lock set, if required.
 793  * The trick here is to increment the sref at the start, so that the nfsds
 794  * will stop using it and clear ns_flag at the end so that it will not be
 795  * reassigned during cleanup.
 796  */
 797 static void
 798 nfsrv_zapsock(struct nfssvc_sock *slp)
 799 {
 800         struct nfsuid *nuidp, *nnuidp;
 801         struct nfsrv_descript *nwp, *nnwp;
 802         struct socket *so;
 803         struct file *fp;
 804         struct nfsrv_rec *rec;
 805
 806         slp->ns_flag &= ~SLP_ALLFLAGS;
 807         fp = slp->ns_fp;
 808         if (fp) {
 809                 slp->ns_fp = NULL;
 810                 so = slp->ns_so;
 811                 atomic_clear_int(&so->so_rcv.ssb_flags, SSB_UPCALL);
 812                 so->so_upcall = NULL;
 813                 so->so_upcallarg = NULL;
 814                 soshutdown(so, SHUT_RDWR);
 815                 closef(fp, NULL);
 816                 if (slp->ns_nam)
 817                         FREE(slp->ns_nam, M_SONAME);
 818                 m_freem(slp->ns_raw);
 819                 while ((rec = STAILQ_FIRST(&slp->ns_rec)) != NULL) {
 820                         --slp->ns_numrec;
 821                         STAILQ_REMOVE_HEAD(&slp->ns_rec, nr_link);
 822                         if (rec->nr_address)
 823                                 FREE(rec->nr_address, M_SONAME);
 824                         m_freem(rec->nr_packet);
 825                         kfree(rec, M_NFSRVDESC);
 826                 }
 827                 KKASSERT(slp->ns_numrec == 0);
 828
 829                 TAILQ_FOREACH_MUTABLE(nuidp, &slp->ns_uidlruhead, nu_lru,
 830                                       nnuidp) {
 831                         LIST_REMOVE(nuidp, nu_hash);
 832                         TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, nu_lru);
 833                         if (nuidp->nu_flag & NU_NAM)
 834                                 FREE(nuidp->nu_nam, M_SONAME);
 835                         kfree((caddr_t)nuidp, M_NFSUID);
 836                 }
 837                 crit_enter();
 838                 for (nwp = slp->ns_tq.lh_first; nwp; nwp = nnwp) {
 839                         nnwp = nwp->nd_tq.le_next;
 840                         LIST_REMOVE(nwp, nd_tq);
 841                         kfree((caddr_t)nwp, M_NFSRVDESC);
 842                 }
 843                 LIST_INIT(&slp->ns_tq);
 844                 crit_exit();
 845                 nfsrv_slpderef(slp);
 846         }
 847 }
 848
 849 /*
 850  * Derefence a server socket structure. If it has no more references and
 851  * is no longer valid, you can throw it away.
 852  *
 853  * Must be holding nfs_token!
 854  */
 855 void
 856 nfsrv_slpderef(struct nfssvc_sock *slp)
 857 {
 858         ASSERT_LWKT_TOKEN_HELD(&nfs_token);
 859         if (slp->ns_sref == 1) {
 860                 KKASSERT((slp->ns_flag & SLP_VALID) == 0);
 861                 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain);
 862                 slp->ns_sref = 0;
 863                 kfree((caddr_t)slp, M_NFSSVC);
 864         } else {
 865                 --slp->ns_sref;
 866         }
 867 }
 868
 869 void
 870 nfsrv_slpref(struct nfssvc_sock *slp)
 871 {
 872         ASSERT_LWKT_TOKEN_HELD(&nfs_token);
 873         ++slp->ns_sref;
 874 }
 875
 876 /*
 877  * Lock a socket against others.
 878  *
 879  * Returns 0 on failure, 1 on success.
 880  */
 881 int
 882 nfs_slplock(struct nfssvc_sock *slp, int wait)
 883 {
 884         mtx_t mtx = &slp->ns_solock;
 885
 886         if (wait) {
 887                 mtx_lock_ex(mtx, "nfsslplck", 0, 0);
 888                 return(1);
 889         } else if (mtx_lock_ex_try(mtx) == 0) {
 890                 return(1);
 891         } else {
 892                 return(0);
 893         }
 894 }
 895
 896 /*
 897  * Unlock the stream socket for others.
 898  */
 899 void
 900 nfs_slpunlock(struct nfssvc_sock *slp)
 901 {
 902         mtx_t mtx = &slp->ns_solock;
 903
 904         mtx_unlock(mtx);
 905 }
 906
 907 /*
 908  * Initialize the data structures for the server.
 909  * Handshake with any new nfsds starting up to avoid any chance of
 910  * corruption.
 911  */
 912 void
 913 nfsrv_init(int terminating)
 914 {
 915         struct nfssvc_sock *slp, *nslp;
 916
 917         lwkt_gettoken(&nfs_token);
 918         if (nfssvc_sockhead_flag & SLP_INIT)
 919                 panic("nfsd init");
 920         nfssvc_sockhead_flag |= SLP_INIT;
 921
 922         if (terminating) {
 923                 TAILQ_FOREACH_MUTABLE(slp, &nfssvc_sockhead, ns_chain, nslp) {
 924                         if (slp->ns_flag & SLP_VALID)
 925                                 nfsrv_zapsock(slp);
 926                         /*
 927                         TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain);
 928                         kfree((caddr_t)slp, M_NFSSVC);
 929                         */
 930                 }
 931                 nfsrv_cleancache();     /* And clear out server cache */
 932         } else {
 933                 nfs_pub.np_valid = 0;
 934         }
 935
 936         TAILQ_INIT(&nfssvc_sockhead);
 937         nfssvc_sockhead_flag &= ~SLP_INIT;
 938         if (nfssvc_sockhead_flag & SLP_WANTINIT) {
 939                 nfssvc_sockhead_flag &= ~SLP_WANTINIT;
 940                 wakeup((caddr_t)&nfssvc_sockhead);
 941         }
 942
 943         TAILQ_INIT(&nfsd_head);
 944         nfsd_head_flag &= ~NFSD_CHECKSLP;
 945
 946         lwkt_reltoken(&nfs_token);
 947
 948 #if 0
 949         nfs_udpsock = (struct nfssvc_sock *)
 950             kmalloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK | M_ZERO);
 951         mtx_init(&nfs_udpsock->ns_solock);
 952         STAILQ_INIT(&nfs_udpsock->ns_rec);
 953         TAILQ_INIT(&nfs_udpsock->ns_uidlruhead);
 954         TAILQ_INSERT_HEAD(&nfssvc_sockhead, nfs_udpsock, ns_chain);
 955
 956         nfs_cltpsock = (struct nfssvc_sock *)
 957             kmalloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK | M_ZERO);
 958         mtx_init(&nfs_cltpsock->ns_solock);
 959         STAILQ_INIT(&nfs_cltpsock->ns_rec);
 960         TAILQ_INIT(&nfs_cltpsock->ns_uidlruhead);
 961         TAILQ_INSERT_TAIL(&nfssvc_sockhead, nfs_cltpsock, ns_chain);
 962 #endif
 963 }
 964
 965 /*
 966  * Add entries to the server monitor log.
 967  */
 968 static void
 969 nfsd_rt(int sotype, struct nfsrv_descript *nd, int cacherep)
 970 {
 971         struct drt *rt;
 972
 973         rt = &nfsdrt.drt[nfsdrt.pos];
 974         if (cacherep == RC_DOIT)
 975                 rt->flag = 0;
 976         else if (cacherep == RC_REPLY)
 977                 rt->flag = DRT_CACHEREPLY;
 978         else
 979                 rt->flag = DRT_CACHEDROP;
 980         if (sotype == SOCK_STREAM)
 981                 rt->flag |= DRT_TCP;
 982         if (nd->nd_flag & ND_NFSV3)
 983                 rt->flag |= DRT_NFSV3;
 984         rt->proc = nd->nd_procnum;
 985         if (nd->nd_nam->sa_family == AF_INET)
 986             rt->ipadr = ((struct sockaddr_in *)nd->nd_nam)->sin_addr.s_addr;
 987         else
 988             rt->ipadr = INADDR_ANY;
 989         rt->resptime = nfs_curusec() - (nd->nd_starttime.tv_sec * 1000000 + nd->nd_starttime.tv_usec);
 990         getmicrotime(&rt->tstamp);
 991         nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ;
 992 }
 993 #endif /* NFS_NOSERVER */
 994
 995 /*
 996  * Get an authorization string for the uid by having the mount_nfs sitting
 997  * on this mount point porpous out of the kernel and do it.
 998  */
 999 int
1000 nfs_getauth(struct nfsmount *nmp, struct nfsreq *rep,
1001             struct ucred *cred, char **auth_str, int *auth_len, char *verf_str,
1002             int *verf_len, NFSKERBKEY_T key /* return session key */)
1003 {
1004         int error = 0;
1005
1006         while ((nmp->nm_state & NFSSTA_WAITAUTH) == 0) {
1007                 nmp->nm_state |= NFSSTA_WANTAUTH;
1008                 (void) tsleep((caddr_t)&nmp->nm_authtype, 0,
1009                         "nfsauth1", 2 * hz);
1010                 error = nfs_sigintr(nmp, rep, rep->r_td);
1011                 if (error) {
1012                         nmp->nm_state &= ~NFSSTA_WANTAUTH;
1013                         return (error);
1014                 }
1015         }
1016         nmp->nm_state &= ~(NFSSTA_WAITAUTH | NFSSTA_WANTAUTH);
1017         nmp->nm_authstr = *auth_str = (char *)kmalloc(RPCAUTH_MAXSIZ, M_TEMP, M_WAITOK);
1018         nmp->nm_authlen = RPCAUTH_MAXSIZ;
1019         nmp->nm_verfstr = verf_str;
1020         nmp->nm_verflen = *verf_len;
1021         nmp->nm_authuid = cred->cr_uid;
1022         wakeup((caddr_t)&nmp->nm_authstr);
1023
1024         /*
1025          * And wait for mount_nfs to do its stuff.
1026          */
1027         while ((nmp->nm_state & NFSSTA_HASAUTH) == 0 && error == 0) {
1028                 (void) tsleep((caddr_t)&nmp->nm_authlen, 0,
1029                         "nfsauth2", 2 * hz);
1030                 error = nfs_sigintr(nmp, rep, rep->r_td);
1031         }
1032         if (nmp->nm_state & NFSSTA_AUTHERR) {
1033                 nmp->nm_state &= ~NFSSTA_AUTHERR;
1034                 error = EAUTH;
1035         }
1036         if (error)
1037                 kfree((caddr_t)*auth_str, M_TEMP);
1038         else {
1039                 *auth_len = nmp->nm_authlen;
1040                 *verf_len = nmp->nm_verflen;
1041                 bcopy((caddr_t)nmp->nm_key, (caddr_t)key, sizeof (key));
1042         }
1043         nmp->nm_state &= ~NFSSTA_HASAUTH;
1044         nmp->nm_state |= NFSSTA_WAITAUTH;
1045         if (nmp->nm_state & NFSSTA_WANTAUTH) {
1046                 nmp->nm_state &= ~NFSSTA_WANTAUTH;
1047                 wakeup((caddr_t)&nmp->nm_authtype);
1048         }
1049         return (error);
1050 }
1051
1052 /*
1053  * Get a nickname authenticator and verifier.
1054  */
1055 int
1056 nfs_getnickauth(struct nfsmount *nmp, struct ucred *cred, char **auth_str,
1057                 int *auth_len, char *verf_str, int verf_len)
1058 {
1059         struct nfsuid *nuidp;
1060         u_int32_t *nickp, *verfp;
1061         struct timeval ktvin, ktvout;
1062
1063 #ifdef DIAGNOSTIC
1064         if (verf_len < (4 * NFSX_UNSIGNED))
1065                 panic("nfs_getnickauth verf too small");
1066 #endif
1067         for (nuidp = NMUIDHASH(nmp, cred->cr_uid)->lh_first;
1068             nuidp != 0; nuidp = nuidp->nu_hash.le_next) {
1069                 if (nuidp->nu_cr.cr_uid == cred->cr_uid)
1070                         break;
1071         }
1072         if (!nuidp || nuidp->nu_expire < time_second)
1073                 return (EACCES);
1074
1075         /*
1076          * Move to the end of the lru list (end of lru == most recently used).
1077          */
1078         TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru);
1079         TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, nu_lru);
1080
1081         nickp = (u_int32_t *)kmalloc(2 * NFSX_UNSIGNED, M_TEMP, M_WAITOK);
1082         *nickp++ = txdr_unsigned(RPCAKN_NICKNAME);
1083         *nickp = txdr_unsigned(nuidp->nu_nickname);
1084         *auth_str = (char *)nickp;
1085         *auth_len = 2 * NFSX_UNSIGNED;
1086
1087         /*
1088          * Now we must encrypt the verifier and package it up.
1089          */
1090         verfp = (u_int32_t *)verf_str;
1091         *verfp++ = txdr_unsigned(RPCAKN_NICKNAME);
1092         if (time_second > nuidp->nu_timestamp.tv_sec ||
1093             (time_second == nuidp->nu_timestamp.tv_sec &&
1094              time_second > nuidp->nu_timestamp.tv_usec))
1095                 getmicrotime(&nuidp->nu_timestamp);
1096         else
1097                 nuidp->nu_timestamp.tv_usec++;
1098         ktvin.tv_sec = txdr_unsigned(nuidp->nu_timestamp.tv_sec);
1099         ktvin.tv_usec = txdr_unsigned(nuidp->nu_timestamp.tv_usec);
1100
1101         /*
1102          * Now encrypt the timestamp verifier in ecb mode using the session
1103          * key.
1104          */
1105 #ifdef NFSKERB
1106         XXX
1107 #else
1108         ktvout.tv_sec = 0;
1109         ktvout.tv_usec = 0;
1110 #endif
1111
1112         *verfp++ = ktvout.tv_sec;
1113         *verfp++ = ktvout.tv_usec;
1114         *verfp = 0;
1115         return (0);
1116 }
1117
1118 /*
1119  * Save the current nickname in a hash list entry on the mount point.
1120  */
1121 int
1122 nfs_savenickauth(struct nfsmount *nmp, struct ucred *cred, int len,
1123                  NFSKERBKEY_T key, struct mbuf **mdp, char **dposp,
1124                  struct mbuf *mrep)
1125 {
1126         struct nfsuid *nuidp;
1127         u_int32_t *tl;
1128         struct timeval ktvin, ktvout;
1129         u_int32_t nick;
1130         int deltasec, error = 0;
1131         struct nfsm_info info;
1132
1133         info.md = *mdp;
1134         info.dpos = *dposp;
1135         info.mrep = mrep;
1136
1137         if (len == (3 * NFSX_UNSIGNED)) {
1138                 NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED));
1139                 ktvin.tv_sec = *tl++;
1140                 ktvin.tv_usec = *tl++;
1141                 nick = fxdr_unsigned(u_int32_t, *tl);
1142
1143                 /*
1144                  * Decrypt the timestamp in ecb mode.
1145                  */
1146 #ifdef NFSKERB
1147                 XXX
1148 #else
1149                 ktvout.tv_sec = 0;
1150                 ktvout.tv_usec = 0;
1151 #endif
1152                 ktvout.tv_sec = fxdr_unsigned(long, ktvout.tv_sec);
1153                 ktvout.tv_usec = fxdr_unsigned(long, ktvout.tv_usec);
1154                 deltasec = time_second - ktvout.tv_sec;
1155                 if (deltasec < 0)
1156                         deltasec = -deltasec;
1157                 /*
1158                  * If ok, add it to the hash list for the mount point.
1159                  */
1160                 if (deltasec <= NFS_KERBCLOCKSKEW) {
1161                         if (nmp->nm_numuids < nuidhash_max) {
1162                                 nmp->nm_numuids++;
1163                                 nuidp = (struct nfsuid *)
1164                                    kmalloc(sizeof (struct nfsuid), M_NFSUID,
1165                                         M_WAITOK);
1166                         } else {
1167                                 nuidp = TAILQ_FIRST(&nmp->nm_uidlruhead);
1168                                 LIST_REMOVE(nuidp, nu_hash);
1169                                 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp,
1170                                         nu_lru);
1171                         }
1172                         nuidp->nu_flag = 0;
1173                         nuidp->nu_cr.cr_uid = cred->cr_uid;
1174                         nuidp->nu_expire = time_second + NFS_KERBTTL;
1175                         nuidp->nu_timestamp = ktvout;
1176                         nuidp->nu_nickname = nick;
1177                         bcopy(key, nuidp->nu_key, sizeof (key));
1178                         TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp,
1179                                 nu_lru);
1180                         LIST_INSERT_HEAD(NMUIDHASH(nmp, cred->cr_uid),
1181                                 nuidp, nu_hash);
1182                 }
1183         } else {
1184                 ERROROUT(nfsm_adv(&info, nfsm_rndup(len)));
1185         }
1186 nfsmout:
1187         *mdp = info.md;
1188         *dposp = info.dpos;
1189         return (error);
1190 }