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