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                                         FREE(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                                 FREE(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                         FREE(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                             lwkt_reltoken(&slp->ns_token);
 606                             return (ENEEDAUTH);
 607                         cacherep = RC_DROPIT;
 608                     } else {
 609                         cacherep = nfsrv_getcache(nd, slp, &mreq);
 610                     }
 611
 612                     if (nfsd->nfsd_flag & NFSD_AUTHFAIL) {
 613                         nfsd->nfsd_flag &= ~NFSD_AUTHFAIL;
 614                         nd->nd_procnum = NFSPROC_NOOP;
 615                         nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
 616                         cacherep = RC_DOIT;
 617                     } else if (nfs_privport) {
 618                         /* Check if source port is privileged */
 619                         u_short port;
 620                         struct sockaddr *nam = nd->nd_nam;
 621                         struct sockaddr_in *sin;
 622
 623                         sin = (struct sockaddr_in *)nam;
 624                         port = ntohs(sin->sin_port);
 625                         if (port >= IPPORT_RESERVED &&
 626                             nd->nd_procnum != NFSPROC_NULL) {
 627                             nd->nd_procnum = NFSPROC_NOOP;
 628                             nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
 629                             cacherep = RC_DOIT;
 630                             kprintf("NFS request from unprivileged port (%s:%d)\n",
 631                                    inet_ntoa(sin->sin_addr), port);
 632                         }
 633                     }
 634
 635                 }
 636
 637                 /*
 638                  * Execute the NFS request - direct execution
 639                  *
 640                  * Loop to get all the write rpc replies that have been
 641                  * gathered together.
 642                  *
 643                  * nfs_token not held here.  slp token is held.
 644                  */
 645                 do {
 646                     switch (cacherep) {
 647                     case RC_DOIT:
 648                         if (nd && (nd->nd_flag & ND_NFSV3))
 649                             procrastinate = nfsrvw_procrastinate_v3;
 650                         else
 651                             procrastinate = nfsrvw_procrastinate;
 652                         if (writes_todo || (nd->nd_procnum == NFSPROC_WRITE &&
 653                             procrastinate > 0)
 654                         ) {
 655                             error = nfsrv_writegather(&nd, slp,
 656                                                       nfsd->nfsd_td, &mreq);
 657                         } else {
 658                             /* NOT YET lwkt_reltoken(&slp->ns_token); */
 659                             error = (*(nfsrv3_procs[nd->nd_procnum]))(nd,
 660                                                 slp, nfsd->nfsd_td, &mreq);
 661                             /* NOT YET lwkt_gettoken(&slp->ns_token); */
 662                         }
 663                         if (mreq == NULL)
 664                                 break;
 665                         if (error != 0 && error != NFSERR_RETVOID) {
 666                                 if (nd->nd_procnum != NQNFSPROC_VACATED)
 667                                         nfsstats.srv_errs++;
 668                                 nfsrv_updatecache(nd, FALSE, mreq);
 669                                 if (nd->nd_nam2)
 670                                         FREE(nd->nd_nam2, M_SONAME);
 671                                 break;
 672                         }
 673                         nfsstats.srvrpccnt[nd->nd_procnum]++;
 674                         nfsrv_updatecache(nd, TRUE, mreq);
 675                         nd->nd_mrep = NULL;
 676                         /* FALL THROUGH */
 677                     case RC_REPLY:
 678                         m = mreq;
 679                         siz = 0;
 680                         while (m) {
 681                                 siz += m->m_len;
 682                                 m = m->m_next;
 683                         }
 684                         if (siz <= 0 || siz > NFS_MAXPACKET) {
 685                                 kprintf("mbuf siz=%d\n",siz);
 686                                 panic("Bad nfs svc reply");
 687                         }
 688                         m = mreq;
 689                         m->m_pkthdr.len = siz;
 690                         m->m_pkthdr.rcvif = NULL;
 691                         /*
 692                          * For stream protocols, prepend a Sun RPC
 693                          * Record Mark.
 694                          */
 695                         if (sotype == SOCK_STREAM) {
 696                                 M_PREPEND(m, NFSX_UNSIGNED, MB_WAIT);
 697                                 if (m == NULL) {
 698                                         error = ENOBUFS;
 699                                         goto skip;
 700                                 }
 701                                 *mtod(m, u_int32_t *) = htonl(0x80000000 | siz);
 702                         }
 703                         if (slp->ns_so->so_proto->pr_flags & PR_CONNREQUIRED)
 704                                 (void) nfs_slplock(slp, 1);
 705                         if (slp->ns_flag & SLP_VALID)
 706                             error = nfs_send(slp->ns_so, nd->nd_nam2, m, NULL);
 707                         else {
 708                             error = EPIPE;
 709                             m_freem(m);
 710                         }
 711 skip:
 712                         if (nfsrtton)
 713                                 nfsd_rt(sotype, nd, cacherep);
 714                         if (nd->nd_nam2)
 715                                 FREE(nd->nd_nam2, M_SONAME);
 716                         if (nd->nd_mrep)
 717                                 m_freem(nd->nd_mrep);
 718                         if (error == EPIPE || error == ENOBUFS)
 719                                 nfsrv_zapsock(slp);
 720                         if (slp->ns_so->so_proto->pr_flags & PR_CONNREQUIRED)
 721                                 nfs_slpunlock(slp);
 722                         if (error == EINTR || error == ERESTART) {
 723                                 kfree((caddr_t)nd, M_NFSRVDESC);
 724                                 lwkt_reltoken(&slp->ns_token);
 725                                 lwkt_gettoken(&nfs_token);
 726                                 nfsd->nfsd_slp = NULL;
 727                                 nfsrv_slpderef(slp);
 728                                 goto done;
 729                         }
 730                         break;
 731                     case RC_DROPIT:
 732                         if (nfsrtton)
 733                                 nfsd_rt(sotype, nd, cacherep);
 734                         m_freem(nd->nd_mrep);
 735                         if (nd->nd_nam2)
 736                                 FREE(nd->nd_nam2, M_SONAME);
 737                         break;
 738                     };
 739                     if (nd) {
 740                         FREE((caddr_t)nd, M_NFSRVDESC);
 741                         nd = NULL;
 742                     }
 743
 744                     /*
 745                      * Check to see if there are outstanding writes that
 746                      * need to be serviced.
 747                      */
 748                     cur_usec = nfs_curusec();
 749                     if (slp->ns_tq.lh_first &&
 750                         slp->ns_tq.lh_first->nd_time <= cur_usec) {
 751                         cacherep = RC_DOIT;
 752                         writes_todo = 1;
 753                     } else {
 754                         writes_todo = 0;
 755                     }
 756                 } while (writes_todo);
 757
 758                 /*
 759                  * nfs_token not held here.  slp token is held.
 760                  */
 761                 if (nfsrv_dorec(slp, nfsd, &nd)) {
 762                         nfsd->nfsd_flag &= ~NFSD_REQINPROG;
 763                         if (slp->ns_flag & SLP_ACTION_MASK) {
 764                                 lwkt_reltoken(&slp->ns_token);
 765                                 lwkt_gettoken(&nfs_token);
 766                         } else {
 767                                 nfsd->nfsd_slp = NULL;
 768                                 lwkt_reltoken(&slp->ns_token);
 769                                 lwkt_gettoken(&nfs_token);
 770                                 nfsrv_slpderef(slp);
 771                         }
 772                 } else {
 773                         lwkt_reltoken(&slp->ns_token);
 774                         lwkt_gettoken(&nfs_token);
 775                 }
 776         }
 777 done:
 778         TAILQ_REMOVE(&nfsd_head, nfsd, nfsd_chain);
 779         kfree((caddr_t)nfsd, M_NFSD);
 780         nsd->nsd_nfsd = NULL;
 781         if (--nfs_numnfsd == 0)
 782                 nfsrv_init(TRUE);       /* Reinitialize everything */
 783
 784         lwkt_reltoken(&nfs_token);
 785         return (error);
 786 }
 787
 788 /*
 789  * Shut down a socket associated with an nfssvc_sock structure.
 790  * Should be called with the send lock set, if required.
 791  * The trick here is to increment the sref at the start, so that the nfsds
 792  * will stop using it and clear ns_flag at the end so that it will not be
 793  * reassigned during cleanup.
 794  */
 795 static void
 796 nfsrv_zapsock(struct nfssvc_sock *slp)
 797 {
 798         struct nfsuid *nuidp, *nnuidp;
 799         struct nfsrv_descript *nwp, *nnwp;
 800         struct socket *so;
 801         struct file *fp;
 802         struct nfsrv_rec *rec;
 803
 804         slp->ns_flag &= ~SLP_ALLFLAGS;
 805         fp = slp->ns_fp;
 806         if (fp) {
 807                 slp->ns_fp = NULL;
 808                 so = slp->ns_so;
 809                 atomic_clear_int(&so->so_rcv.ssb_flags, SSB_UPCALL);
 810                 so->so_upcall = NULL;
 811                 so->so_upcallarg = NULL;
 812                 soshutdown(so, SHUT_RDWR);
 813                 closef(fp, NULL);
 814                 if (slp->ns_nam)
 815                         FREE(slp->ns_nam, M_SONAME);
 816                 m_freem(slp->ns_raw);
 817                 while ((rec = STAILQ_FIRST(&slp->ns_rec)) != NULL) {
 818                         --slp->ns_numrec;
 819                         STAILQ_REMOVE_HEAD(&slp->ns_rec, nr_link);
 820                         if (rec->nr_address)
 821                                 FREE(rec->nr_address, M_SONAME);
 822                         m_freem(rec->nr_packet);
 823                         kfree(rec, M_NFSRVDESC);
 824                 }
 825                 KKASSERT(slp->ns_numrec == 0);
 826
 827                 TAILQ_FOREACH_MUTABLE(nuidp, &slp->ns_uidlruhead, nu_lru,
 828                                       nnuidp) {
 829                         LIST_REMOVE(nuidp, nu_hash);
 830                         TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, nu_lru);
 831                         if (nuidp->nu_flag & NU_NAM)
 832                                 FREE(nuidp->nu_nam, M_SONAME);
 833                         kfree((caddr_t)nuidp, M_NFSUID);
 834                 }
 835                 crit_enter();
 836                 for (nwp = slp->ns_tq.lh_first; nwp; nwp = nnwp) {
 837                         nnwp = nwp->nd_tq.le_next;
 838                         LIST_REMOVE(nwp, nd_tq);
 839                         kfree((caddr_t)nwp, M_NFSRVDESC);
 840                 }
 841                 LIST_INIT(&slp->ns_tq);
 842                 crit_exit();
 843                 nfsrv_slpderef(slp);
 844         }
 845 }
 846
 847 /*
 848  * Derefence a server socket structure. If it has no more references and
 849  * is no longer valid, you can throw it away.
 850  *
 851  * Must be holding nfs_token!
 852  */
 853 void
 854 nfsrv_slpderef(struct nfssvc_sock *slp)
 855 {
 856         ASSERT_LWKT_TOKEN_HELD(&nfs_token);
 857         if (slp->ns_sref == 1) {
 858                 KKASSERT((slp->ns_flag & SLP_VALID) == 0);
 859                 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain);
 860                 slp->ns_sref = 0;
 861                 kfree((caddr_t)slp, M_NFSSVC);
 862         } else {
 863                 --slp->ns_sref;
 864         }
 865 }
 866
 867 void
 868 nfsrv_slpref(struct nfssvc_sock *slp)
 869 {
 870         ASSERT_LWKT_TOKEN_HELD(&nfs_token);
 871         ++slp->ns_sref;
 872 }
 873
 874 /*
 875  * Lock a socket against others.
 876  *
 877  * Returns 0 on failure, 1 on success.
 878  */
 879 int
 880 nfs_slplock(struct nfssvc_sock *slp, int wait)
 881 {
 882         mtx_t mtx = &slp->ns_solock;
 883
 884         if (wait) {
 885                 mtx_lock_ex(mtx, "nfsslplck", 0, 0);
 886                 return(1);
 887         } else if (mtx_lock_ex_try(mtx) == 0) {
 888                 return(1);
 889         } else {
 890                 return(0);
 891         }
 892 }
 893
 894 /*
 895  * Unlock the stream socket for others.
 896  */
 897 void
 898 nfs_slpunlock(struct nfssvc_sock *slp)
 899 {
 900         mtx_t mtx = &slp->ns_solock;
 901
 902         mtx_unlock(mtx);
 903 }
 904
 905 /*
 906  * Initialize the data structures for the server.
 907  * Handshake with any new nfsds starting up to avoid any chance of
 908  * corruption.
 909  */
 910 void
 911 nfsrv_init(int terminating)
 912 {
 913         struct nfssvc_sock *slp, *nslp;
 914
 915         lwkt_gettoken(&nfs_token);
 916         if (nfssvc_sockhead_flag & SLP_INIT)
 917                 panic("nfsd init");
 918         nfssvc_sockhead_flag |= SLP_INIT;
 919
 920         if (terminating) {
 921                 TAILQ_FOREACH_MUTABLE(slp, &nfssvc_sockhead, ns_chain, nslp) {
 922                         if (slp->ns_flag & SLP_VALID)
 923                                 nfsrv_zapsock(slp);
 924                         /*
 925                         TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain);
 926                         kfree((caddr_t)slp, M_NFSSVC);
 927                         */
 928                 }
 929                 nfsrv_cleancache();     /* And clear out server cache */
 930         } else {
 931                 nfs_pub.np_valid = 0;
 932         }
 933
 934         TAILQ_INIT(&nfssvc_sockhead);
 935         nfssvc_sockhead_flag &= ~SLP_INIT;
 936         if (nfssvc_sockhead_flag & SLP_WANTINIT) {
 937                 nfssvc_sockhead_flag &= ~SLP_WANTINIT;
 938                 wakeup((caddr_t)&nfssvc_sockhead);
 939         }
 940
 941         TAILQ_INIT(&nfsd_head);
 942         nfsd_head_flag &= ~NFSD_CHECKSLP;
 943
 944         lwkt_reltoken(&nfs_token);
 945
 946 #if 0
 947         nfs_udpsock = (struct nfssvc_sock *)
 948             kmalloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK | M_ZERO);
 949         mtx_init(&nfs_udpsock->ns_solock);
 950         STAILQ_INIT(&nfs_udpsock->ns_rec);
 951         TAILQ_INIT(&nfs_udpsock->ns_uidlruhead);
 952         TAILQ_INSERT_HEAD(&nfssvc_sockhead, nfs_udpsock, ns_chain);
 953
 954         nfs_cltpsock = (struct nfssvc_sock *)
 955             kmalloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK | M_ZERO);
 956         mtx_init(&nfs_cltpsock->ns_solock);
 957         STAILQ_INIT(&nfs_cltpsock->ns_rec);
 958         TAILQ_INIT(&nfs_cltpsock->ns_uidlruhead);
 959         TAILQ_INSERT_TAIL(&nfssvc_sockhead, nfs_cltpsock, ns_chain);
 960 #endif
 961 }
 962
 963 /*
 964  * Add entries to the server monitor log.
 965  */
 966 static void
 967 nfsd_rt(int sotype, struct nfsrv_descript *nd, int cacherep)
 968 {
 969         struct drt *rt;
 970
 971         rt = &nfsdrt.drt[nfsdrt.pos];
 972         if (cacherep == RC_DOIT)
 973                 rt->flag = 0;
 974         else if (cacherep == RC_REPLY)
 975                 rt->flag = DRT_CACHEREPLY;
 976         else
 977                 rt->flag = DRT_CACHEDROP;
 978         if (sotype == SOCK_STREAM)
 979                 rt->flag |= DRT_TCP;
 980         if (nd->nd_flag & ND_NFSV3)
 981                 rt->flag |= DRT_NFSV3;
 982         rt->proc = nd->nd_procnum;
 983         if (nd->nd_nam->sa_family == AF_INET)
 984             rt->ipadr = ((struct sockaddr_in *)nd->nd_nam)->sin_addr.s_addr;
 985         else
 986             rt->ipadr = INADDR_ANY;
 987         rt->resptime = nfs_curusec() - (nd->nd_starttime.tv_sec * 1000000 + nd->nd_starttime.tv_usec);
 988         getmicrotime(&rt->tstamp);
 989         nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ;
 990 }
 991 #endif /* NFS_NOSERVER */
 992
 993 /*
 994  * Get an authorization string for the uid by having the mount_nfs sitting
 995  * on this mount point porpous out of the kernel and do it.
 996  */
 997 int
 998 nfs_getauth(struct nfsmount *nmp, struct nfsreq *rep,
 999             struct ucred *cred, char **auth_str, int *auth_len, char *verf_str,
1000             int *verf_len, NFSKERBKEY_T key /* return session key */)
1001 {
1002         int error = 0;
1003
1004         while ((nmp->nm_state & NFSSTA_WAITAUTH) == 0) {
1005                 nmp->nm_state |= NFSSTA_WANTAUTH;
1006                 (void) tsleep((caddr_t)&nmp->nm_authtype, 0,
1007                         "nfsauth1", 2 * hz);
1008                 error = nfs_sigintr(nmp, rep, rep->r_td);
1009                 if (error) {
1010                         nmp->nm_state &= ~NFSSTA_WANTAUTH;
1011                         return (error);
1012                 }
1013         }
1014         nmp->nm_state &= ~(NFSSTA_WAITAUTH | NFSSTA_WANTAUTH);
1015         nmp->nm_authstr = *auth_str = (char *)kmalloc(RPCAUTH_MAXSIZ, M_TEMP, M_WAITOK);
1016         nmp->nm_authlen = RPCAUTH_MAXSIZ;
1017         nmp->nm_verfstr = verf_str;
1018         nmp->nm_verflen = *verf_len;
1019         nmp->nm_authuid = cred->cr_uid;
1020         wakeup((caddr_t)&nmp->nm_authstr);
1021
1022         /*
1023          * And wait for mount_nfs to do its stuff.
1024          */
1025         while ((nmp->nm_state & NFSSTA_HASAUTH) == 0 && error == 0) {
1026                 (void) tsleep((caddr_t)&nmp->nm_authlen, 0,
1027                         "nfsauth2", 2 * hz);
1028                 error = nfs_sigintr(nmp, rep, rep->r_td);
1029         }
1030         if (nmp->nm_state & NFSSTA_AUTHERR) {
1031                 nmp->nm_state &= ~NFSSTA_AUTHERR;
1032                 error = EAUTH;
1033         }
1034         if (error)
1035                 kfree((caddr_t)*auth_str, M_TEMP);
1036         else {
1037                 *auth_len = nmp->nm_authlen;
1038                 *verf_len = nmp->nm_verflen;
1039                 bcopy((caddr_t)nmp->nm_key, (caddr_t)key, sizeof (NFSKERBKEY_T));
1040         }
1041         nmp->nm_state &= ~NFSSTA_HASAUTH;
1042         nmp->nm_state |= NFSSTA_WAITAUTH;
1043         if (nmp->nm_state & NFSSTA_WANTAUTH) {
1044                 nmp->nm_state &= ~NFSSTA_WANTAUTH;
1045                 wakeup((caddr_t)&nmp->nm_authtype);
1046         }
1047         return (error);
1048 }
1049
1050 /*
1051  * Get a nickname authenticator and verifier.
1052  */
1053 int
1054 nfs_getnickauth(struct nfsmount *nmp, struct ucred *cred, char **auth_str,
1055                 int *auth_len, char *verf_str, int verf_len)
1056 {
1057         struct nfsuid *nuidp;
1058         u_int32_t *nickp, *verfp;
1059         struct timeval ktvin, ktvout;
1060
1061 #ifdef DIAGNOSTIC
1062         if (verf_len < (4 * NFSX_UNSIGNED))
1063                 panic("nfs_getnickauth verf too small");
1064 #endif
1065         for (nuidp = NMUIDHASH(nmp, cred->cr_uid)->lh_first;
1066             nuidp != 0; nuidp = nuidp->nu_hash.le_next) {
1067                 if (nuidp->nu_cr.cr_uid == cred->cr_uid)
1068                         break;
1069         }
1070         if (!nuidp || nuidp->nu_expire < time_second)
1071                 return (EACCES);
1072
1073         /*
1074          * Move to the end of the lru list (end of lru == most recently used).
1075          */
1076         TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru);
1077         TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, nu_lru);
1078
1079         nickp = (u_int32_t *)kmalloc(2 * NFSX_UNSIGNED, M_TEMP, M_WAITOK);
1080         *nickp++ = txdr_unsigned(RPCAKN_NICKNAME);
1081         *nickp = txdr_unsigned(nuidp->nu_nickname);
1082         *auth_str = (char *)nickp;
1083         *auth_len = 2 * NFSX_UNSIGNED;
1084
1085         /*
1086          * Now we must encrypt the verifier and package it up.
1087          */
1088         verfp = (u_int32_t *)verf_str;
1089         *verfp++ = txdr_unsigned(RPCAKN_NICKNAME);
1090         if (time_second > nuidp->nu_timestamp.tv_sec ||
1091             (time_second == nuidp->nu_timestamp.tv_sec &&
1092              time_second > nuidp->nu_timestamp.tv_usec))
1093                 getmicrotime(&nuidp->nu_timestamp);
1094         else
1095                 nuidp->nu_timestamp.tv_usec++;
1096         ktvin.tv_sec = txdr_unsigned(nuidp->nu_timestamp.tv_sec);
1097         ktvin.tv_usec = txdr_unsigned(nuidp->nu_timestamp.tv_usec);
1098
1099         /*
1100          * Now encrypt the timestamp verifier in ecb mode using the session
1101          * key.
1102          */
1103 #ifdef NFSKERB
1104         XXX
1105 #else
1106         ktvout.tv_sec = 0;
1107         ktvout.tv_usec = 0;
1108 #endif
1109
1110         *verfp++ = ktvout.tv_sec;
1111         *verfp++ = ktvout.tv_usec;
1112         *verfp = 0;
1113         return (0);
1114 }
1115
1116 /*
1117  * Save the current nickname in a hash list entry on the mount point.
1118  */
1119 int
1120 nfs_savenickauth(struct nfsmount *nmp, struct ucred *cred, int len,
1121                  NFSKERBKEY_T key, struct mbuf **mdp, char **dposp,
1122                  struct mbuf *mrep)
1123 {
1124         struct nfsuid *nuidp;
1125         u_int32_t *tl;
1126         struct timeval ktvin, ktvout;
1127         u_int32_t nick;
1128         int deltasec, error = 0;
1129         struct nfsm_info info;
1130
1131         info.md = *mdp;
1132         info.dpos = *dposp;
1133         info.mrep = mrep;
1134
1135         if (len == (3 * NFSX_UNSIGNED)) {
1136                 NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED));
1137                 ktvin.tv_sec = *tl++;
1138                 ktvin.tv_usec = *tl++;
1139                 nick = fxdr_unsigned(u_int32_t, *tl);
1140
1141                 /*
1142                  * Decrypt the timestamp in ecb mode.
1143                  */
1144 #ifdef NFSKERB
1145                 XXX
1146 #else
1147                 ktvout.tv_sec = 0;
1148                 ktvout.tv_usec = 0;
1149 #endif
1150                 ktvout.tv_sec = fxdr_unsigned(long, ktvout.tv_sec);
1151                 ktvout.tv_usec = fxdr_unsigned(long, ktvout.tv_usec);
1152                 deltasec = time_second - ktvout.tv_sec;
1153                 if (deltasec < 0)
1154                         deltasec = -deltasec;
1155                 /*
1156                  * If ok, add it to the hash list for the mount point.
1157                  */
1158                 if (deltasec <= NFS_KERBCLOCKSKEW) {
1159                         if (nmp->nm_numuids < nuidhash_max) {
1160                                 nmp->nm_numuids++;
1161                                 nuidp = (struct nfsuid *)
1162                                    kmalloc(sizeof (struct nfsuid), M_NFSUID,
1163                                         M_WAITOK);
1164                         } else {
1165                                 nuidp = TAILQ_FIRST(&nmp->nm_uidlruhead);
1166                                 LIST_REMOVE(nuidp, nu_hash);
1167                                 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp,
1168                                         nu_lru);
1169                         }
1170                         nuidp->nu_flag = 0;
1171                         nuidp->nu_cr.cr_uid = cred->cr_uid;
1172                         nuidp->nu_expire = time_second + NFS_KERBTTL;
1173                         nuidp->nu_timestamp = ktvout;
1174                         nuidp->nu_nickname = nick;
1175                         bcopy(key, nuidp->nu_key, sizeof (NFSKERBKEY_T));
1176                         TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp,
1177                                 nu_lru);
1178                         LIST_INSERT_HEAD(NMUIDHASH(nmp, cred->cr_uid),
1179                                 nuidp, nu_hash);
1180                 }
1181         } else {
1182                 ERROROUT(nfsm_adv(&info, nfsm_rndup(len)));
1183         }
1184 nfsmout:
1185         *mdp = info.md;
1186         *dposp = info.dpos;
1187         return (error);
1188 }