sys/vfs/nfs/nfs_syscalls.c

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