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