sys/vfs/nfs/nfs_syscalls.c

   1 /*
   2  * Copyright (c) 1989, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Rick Macklem at The University of Guelph.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by the University of
  19  *      California, Berkeley and its contributors.
  20  * 4. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  *
  36  *      @(#)nfs_syscalls.c      8.5 (Berkeley) 3/30/95
  37  * $FreeBSD: src/sys/nfs/nfs_syscalls.c,v 1.58.2.1 2000/11/26 02:30:06 dillon Exp $
  38  * $DragonFly: src/sys/vfs/nfs/nfs_syscalls.c,v 1.31 2008/01/05 14:02:41 swildner Exp $
  39  */
  40
  41 #include <sys/param.h>
  42 #include <sys/systm.h>
  43 #include <sys/sysproto.h>
  44 #include <sys/kernel.h>
  45 #include <sys/sysctl.h>
  46 #include <sys/file.h>
  47 #include <sys/filedesc.h>
  48 #include <sys/vnode.h>
  49 #include <sys/malloc.h>
  50 #include <sys/mount.h>
  51 #include <sys/proc.h>
  52 #include <sys/priv.h>
  53 #include <sys/buf.h>
  54 #include <sys/mbuf.h>
  55 #include <sys/resourcevar.h>
  56 #include <sys/socket.h>
  57 #include <sys/socketvar.h>
  58 #include <sys/domain.h>
  59 #include <sys/protosw.h>
  60 #include <sys/nlookup.h>
  61 #include <sys/mutex.h>
  62 #include <vm/vm_zone.h>
  63
  64 #include <sys/mutex2.h>
  65
  66 #include <netinet/in.h>
  67 #include <netinet/tcp.h>
  68 #include "xdr_subs.h"
  69 #include "rpcv2.h"
  70 #include "nfsproto.h"
  71 #include "nfs.h"
  72 #include "nfsm_subs.h"
  73 #include "nfsrvcache.h"
  74 #include "nfsmount.h"
  75 #include "nfsnode.h"
  76 #include "nfsrtt.h"
  77
  78 #include <sys/thread2.h>
  79
  80 static MALLOC_DEFINE(M_NFSSVC, "NFS srvsock", "Nfs server structure");
  81
  82 /* Global defs. */
  83 extern int32_t (*nfsrv3_procs[NFS_NPROCS]) (struct nfsrv_descript *nd,
  84                                             struct nfssvc_sock *slp,
  85                                             struct thread *td,
  86                                             struct mbuf **mreqp);
  87 extern int nfs_numasync;
  88 extern int nfsrtton;
  89 extern struct nfsstats nfsstats;
  90 extern int nfsrvw_procrastinate;
  91 extern int nfsrvw_procrastinate_v3;
  92 static int nuidhash_max = NFS_MAXUIDHASH;
  93
  94 #ifndef NFS_NOSERVER
  95 static void     nfsrv_zapsock (struct nfssvc_sock *slp);
  96 #endif
  97 static int      nfssvc_iod (struct thread *);
  98
  99 #define TRUE    1
 100 #define FALSE   0
 101
 102 static int nfs_asyncdaemon[NFS_MAXASYNCDAEMON];
 103
 104 SYSCTL_DECL(_vfs_nfs);
 105
 106 #ifndef NFS_NOSERVER
 107 int nfsd_waiting = 0;
 108 static struct nfsdrt nfsdrt;
 109 static int nfs_numnfsd = 0;
 110 static void     nfsd_rt (int sotype, struct nfsrv_descript *nd,
 111                              int cacherep);
 112 static int      nfssvc_addsock (struct file *, struct sockaddr *,
 113                                     struct thread *);
 114 static int      nfssvc_nfsd (struct nfsd_srvargs *,caddr_t,struct thread *);
 115
 116 static int nfs_privport = 0;
 117 SYSCTL_INT(_vfs_nfs, NFS_NFSPRIVPORT, nfs_privport, CTLFLAG_RW, &nfs_privport, 0, "");
 118 SYSCTL_INT(_vfs_nfs, OID_AUTO, gatherdelay, CTLFLAG_RW, &nfsrvw_procrastinate, 0, "");
 119 SYSCTL_INT(_vfs_nfs, OID_AUTO, gatherdelay_v3, CTLFLAG_RW, &nfsrvw_procrastinate_v3, 0, "");
 120 static int      nfs_soreserve = 65535;
 121 SYSCTL_INT(_vfs_nfs, OID_AUTO, soreserve, CTLFLAG_RW, &nfs_soreserve, 0, "");
 122
 123 /*
 124  * NFS server system calls
 125  */
 126
 127 #endif /* NFS_NOSERVER */
 128 /*
 129  * nfssvc_args(int flag, caddr_t argp)
 130  *
 131  * Nfs server psuedo system call for the nfsd's
 132  * Based on the flag value it either:
 133  * - adds a socket to the selection list
 134  * - remains in the kernel as an nfsd
 135  * - remains in the kernel as an nfsiod
 136  */
 137 int
 138 sys_nfssvc(struct nfssvc_args *uap)
 139 {
 140 #ifndef NFS_NOSERVER
 141         struct nlookupdata nd;
 142         struct file *fp;
 143         struct sockaddr *nam;
 144         struct nfsd_args nfsdarg;
 145         struct nfsd_srvargs nfsd_srvargs, *nsd = &nfsd_srvargs;
 146         struct nfsd_cargs ncd;
 147         struct nfsd *nfsd;
 148         struct nfssvc_sock *slp;
 149         struct nfsuid *nuidp;
 150         struct nfsmount *nmp;
 151         struct vnode *vp;
 152 #endif /* NFS_NOSERVER */
 153         int error;
 154         struct thread *td = curthread;
 155
 156         /*
 157          * Must be super user
 158          */
 159         error = priv_check(td, PRIV_ROOT);
 160         if(error)
 161                 return (error);
 162         KKASSERT(td->td_proc);  /* for ucred and p_fd */
 163         while (nfssvc_sockhead_flag & SLP_INIT) {
 164                  nfssvc_sockhead_flag |= SLP_WANTINIT;
 165                 (void) tsleep((caddr_t)&nfssvc_sockhead, 0, "nfsd init", 0);
 166         }
 167         if (uap->flag & NFSSVC_BIOD)
 168                 error = nfssvc_iod(td);
 169 #ifdef NFS_NOSERVER
 170         else
 171                 error = ENXIO;
 172 #else /* !NFS_NOSERVER */
 173         else if (uap->flag & NFSSVC_MNTD) {
 174                 error = copyin(uap->argp, (caddr_t)&ncd, sizeof (ncd));
 175                 if (error)
 176                         return (error);
 177                 vp = NULL;
 178                 error = nlookup_init(&nd, ncd.ncd_dirp, UIO_USERSPACE,
 179                                         NLC_FOLLOW);
 180                 if (error == 0)
 181                         error = nlookup(&nd);
 182                 if (error == 0)
 183                         error = cache_vget(&nd.nl_nch, nd.nl_cred, LK_EXCLUSIVE, &vp);
 184                 nlookup_done(&nd);
 185                 if (error)
 186                         return (error);
 187
 188                 if ((vp->v_flag & VROOT) == 0)
 189                         error = EINVAL;
 190                 nmp = VFSTONFS(vp->v_mount);
 191                 vput(vp);
 192                 if (error)
 193                         return (error);
 194                 if ((nmp->nm_state & NFSSTA_MNTD) &&
 195                         (uap->flag & NFSSVC_GOTAUTH) == 0)
 196                         return (0);
 197                 nmp->nm_state |= NFSSTA_MNTD;
 198                 error = nfs_clientd(nmp, td->td_proc->p_ucred, &ncd, uap->flag,
 199                                     uap->argp, td);
 200         } else if (uap->flag & NFSSVC_ADDSOCK) {
 201                 error = copyin(uap->argp, (caddr_t)&nfsdarg, sizeof(nfsdarg));
 202                 if (error)
 203                         return (error);
 204                 error = holdsock(td->td_proc->p_fd, nfsdarg.sock, &fp);
 205                 if (error)
 206                         return (error);
 207                 /*
 208                  * Get the client address for connected sockets.
 209                  */
 210                 if (nfsdarg.name == NULL || nfsdarg.namelen == 0)
 211                         nam = NULL;
 212                 else {
 213                         error = getsockaddr(&nam, nfsdarg.name,
 214                                             nfsdarg.namelen);
 215                         if (error) {
 216                                 fdrop(fp);
 217                                 return (error);
 218                         }
 219                 }
 220                 error = nfssvc_addsock(fp, nam, td);
 221                 fdrop(fp);
 222         } else {
 223                 error = copyin(uap->argp, (caddr_t)nsd, sizeof (*nsd));
 224                 if (error)
 225                         return (error);
 226                 if ((uap->flag & NFSSVC_AUTHIN) &&
 227                     ((nfsd = nsd->nsd_nfsd)) != NULL &&
 228                     (nfsd->nfsd_slp->ns_flag & SLP_VALID)) {
 229                         slp = nfsd->nfsd_slp;
 230
 231                         /*
 232                          * First check to see if another nfsd has already
 233                          * added this credential.
 234                          */
 235                         for (nuidp = NUIDHASH(slp,nsd->nsd_cr.cr_uid)->lh_first;
 236                             nuidp != 0; nuidp = nuidp->nu_hash.le_next) {
 237                                 if (nuidp->nu_cr.cr_uid == nsd->nsd_cr.cr_uid &&
 238                                     (!nfsd->nfsd_nd->nd_nam2 ||
 239                                      netaddr_match(NU_NETFAM(nuidp),
 240                                      &nuidp->nu_haddr, nfsd->nfsd_nd->nd_nam2)))
 241                                         break;
 242                         }
 243                         if (nuidp) {
 244                             nfsrv_setcred(&nuidp->nu_cr,&nfsd->nfsd_nd->nd_cr);
 245                             nfsd->nfsd_nd->nd_flag |= ND_KERBFULL;
 246                         } else {
 247                             /*
 248                              * Nope, so we will.
 249                              */
 250                             if (slp->ns_numuids < nuidhash_max) {
 251                                 slp->ns_numuids++;
 252                                 nuidp = (struct nfsuid *)
 253                                    kmalloc(sizeof (struct nfsuid), M_NFSUID,
 254                                         M_WAITOK);
 255                             } else
 256                                 nuidp = NULL;
 257                             if ((slp->ns_flag & SLP_VALID) == 0) {
 258                                 if (nuidp)
 259                                     kfree((caddr_t)nuidp, M_NFSUID);
 260                             } else {
 261                                 if (nuidp == NULL) {
 262                                     nuidp = TAILQ_FIRST(&slp->ns_uidlruhead);
 263                                     LIST_REMOVE(nuidp, nu_hash);
 264                                     TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp,
 265                                         nu_lru);
 266                                     if (nuidp->nu_flag & NU_NAM)
 267                                         FREE(nuidp->nu_nam, M_SONAME);
 268                                 }
 269                                 nuidp->nu_flag = 0;
 270                                 nuidp->nu_cr = nsd->nsd_cr;
 271                                 if (nuidp->nu_cr.cr_ngroups > NGROUPS)
 272                                     nuidp->nu_cr.cr_ngroups = NGROUPS;
 273                                 nuidp->nu_cr.cr_ref = 1;
 274                                 nuidp->nu_timestamp = nsd->nsd_timestamp;
 275                                 nuidp->nu_expire = time_second + nsd->nsd_ttl;
 276                                 /*
 277                                  * and save the session key in nu_key.
 278                                  */
 279                                 bcopy(nsd->nsd_key, nuidp->nu_key,
 280                                     sizeof (nsd->nsd_key));
 281                                 if (nfsd->nfsd_nd->nd_nam2) {
 282                                     struct sockaddr_in *saddr;
 283
 284                                     saddr = (struct sockaddr_in *)
 285                                             nfsd->nfsd_nd->nd_nam2;
 286                                     switch (saddr->sin_family) {
 287                                     case AF_INET:
 288                                         nuidp->nu_flag |= NU_INETADDR;
 289                                         nuidp->nu_inetaddr =
 290                                              saddr->sin_addr.s_addr;
 291                                         break;
 292                                     case AF_ISO:
 293                                     default:
 294                                         nuidp->nu_flag |= NU_NAM;
 295                                         nuidp->nu_nam =
 296                                           dup_sockaddr(nfsd->nfsd_nd->nd_nam2);
 297                                         break;
 298                                     };
 299                                 }
 300                                 TAILQ_INSERT_TAIL(&slp->ns_uidlruhead, nuidp,
 301                                         nu_lru);
 302                                 LIST_INSERT_HEAD(NUIDHASH(slp, nsd->nsd_uid),
 303                                         nuidp, nu_hash);
 304                                 nfsrv_setcred(&nuidp->nu_cr,
 305                                     &nfsd->nfsd_nd->nd_cr);
 306                                 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL;
 307                             }
 308                         }
 309                 }
 310                 if ((uap->flag & NFSSVC_AUTHINFAIL) && (nfsd = nsd->nsd_nfsd))
 311                         nfsd->nfsd_flag |= NFSD_AUTHFAIL;
 312                 error = nfssvc_nfsd(nsd, uap->argp, td);
 313         }
 314 #endif /* NFS_NOSERVER */
 315         if (error == EINTR || error == ERESTART)
 316                 error = 0;
 317         return (error);
 318 }
 319
 320 #ifndef NFS_NOSERVER
 321 /*
 322  * Adds a socket to the list for servicing by nfsds.
 323  */
 324 static int
 325 nfssvc_addsock(struct file *fp, struct sockaddr *mynam, struct thread *td)
 326 {
 327         int siz;
 328         struct nfssvc_sock *slp;
 329         struct socket *so;
 330         int error;
 331
 332         so = (struct socket *)fp->f_data;
 333 #if 0
 334         tslp = NULL;
 335         /*
 336          * Add it to the list, as required.
 337          */
 338         if (so->so_proto->pr_protocol == IPPROTO_UDP) {
 339                 tslp = nfs_udpsock;
 340                 if (tslp->ns_flag & SLP_VALID) {
 341                         if (mynam != NULL)
 342                                 FREE(mynam, M_SONAME);
 343                         return (EPERM);
 344                 }
 345         }
 346 #endif
 347         /*
 348          * Reserve buffer space in the socket.  Note that due to bugs in
 349          * Linux's delayed-ack code, serious performance degredation may
 350          * occur with linux hosts if the minimum is used.
 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         if (siz > sb_max_adj) {
 359             kprintf("Warning: vfs.nfs.soreserve (%d) "
 360                 "limited to adjusted sb_max (%ld)\n",
 361                 nfs_soreserve, sb_max_adj);
 362             siz = sb_max_adj;
 363         }
 364
 365         error = soreserve(so, siz, siz, &td->td_proc->p_rlimit[RLIMIT_SBSIZE]);
 366         if (error) {
 367                 if (mynam != NULL)
 368                         FREE(mynam, M_SONAME);
 369                 return (error);
 370         }
 371
 372         /*
 373          * Set protocol specific options { for now TCP only } and
 374          * reserve some space. For datagram sockets, this can get called
 375          * repeatedly for the same socket, but that isn't harmful.
 376          */
 377         if (so->so_type == SOCK_STREAM) {
 378                 struct sockopt sopt;
 379                 int val;
 380
 381                 bzero(&sopt, sizeof sopt);
 382                 sopt.sopt_level = SOL_SOCKET;
 383                 sopt.sopt_name = SO_KEEPALIVE;
 384                 sopt.sopt_val = &val;
 385                 sopt.sopt_valsize = sizeof val;
 386                 val = 1;
 387                 sosetopt(so, &sopt);
 388         }
 389         if (so->so_proto->pr_domain->dom_family == AF_INET &&
 390             so->so_proto->pr_protocol == IPPROTO_TCP) {
 391                 struct sockopt sopt;
 392                 int val;
 393
 394                 bzero(&sopt, sizeof sopt);
 395                 sopt.sopt_level = IPPROTO_TCP;
 396                 sopt.sopt_name = TCP_NODELAY;
 397                 sopt.sopt_val = &val;
 398                 sopt.sopt_valsize = sizeof val;
 399                 val = 1;
 400                 sosetopt(so, &sopt);
 401         }
 402         so->so_rcv.ssb_flags &= ~SSB_NOINTR;
 403         so->so_rcv.ssb_timeo = 0;
 404         so->so_snd.ssb_flags &= ~SSB_NOINTR;
 405         so->so_snd.ssb_timeo = 0;
 406
 407         slp = (struct nfssvc_sock *)kmalloc(sizeof (struct nfssvc_sock),
 408             M_NFSSVC, M_WAITOK | M_ZERO);
 409         mtx_init(&slp->ns_solock);
 410         STAILQ_INIT(&slp->ns_rec);
 411         TAILQ_INIT(&slp->ns_uidlruhead);
 412         TAILQ_INSERT_TAIL(&nfssvc_sockhead, slp, ns_chain);
 413
 414         slp->ns_so = so;
 415         slp->ns_nam = mynam;
 416         fp->f_count++;
 417         slp->ns_fp = fp;
 418         crit_enter();
 419         so->so_upcallarg = (caddr_t)slp;
 420         so->so_upcall = nfsrv_rcv;
 421         so->so_rcv.ssb_flags |= SSB_UPCALL;
 422         slp->ns_flag = (SLP_VALID | SLP_NEEDQ);
 423         nfsrv_wakenfsd(slp, 1);
 424         crit_exit();
 425         return (0);
 426 }
 427
 428 /*
 429  * Called by nfssvc() for nfsds. Just loops around servicing rpc requests
 430  * until it is killed by a signal.
 431  */
 432 static int
 433 nfssvc_nfsd(struct nfsd_srvargs *nsd, caddr_t argp, struct thread *td)
 434 {
 435         int siz;
 436         struct nfssvc_sock *slp;
 437         struct nfsd *nfsd = nsd->nsd_nfsd;
 438         struct nfsrv_descript *nd = NULL;
 439         struct mbuf *m, *mreq;
 440         int error = 0, cacherep, sotype, writes_todo;
 441         int procrastinate;
 442         u_quad_t cur_usec;
 443
 444 #ifndef nolint
 445         cacherep = RC_DOIT;
 446         writes_todo = 0;
 447 #endif
 448         if (nfsd == NULL) {
 449                 nsd->nsd_nfsd = nfsd = (struct nfsd *)
 450                         kmalloc(sizeof (struct nfsd), M_NFSD, M_WAITOK|M_ZERO);
 451                 crit_enter();
 452                 nfsd->nfsd_td = td;
 453                 TAILQ_INSERT_TAIL(&nfsd_head, nfsd, nfsd_chain);
 454                 nfs_numnfsd++;
 455         } else
 456                 crit_enter();
 457
 458         /*
 459          * Loop getting rpc requests until SIGKILL.
 460          */
 461         for (;;) {
 462                 if ((nfsd->nfsd_flag & NFSD_REQINPROG) == 0) {
 463                         while (nfsd->nfsd_slp == NULL &&
 464                             (nfsd_head_flag & NFSD_CHECKSLP) == 0) {
 465                                 nfsd->nfsd_flag |= NFSD_WAITING;
 466                                 nfsd_waiting++;
 467                                 error = tsleep((caddr_t)nfsd, PCATCH, "nfsd", 0);
 468                                 nfsd_waiting--;
 469                                 if (error)
 470                                         goto done;
 471                         }
 472                         if (nfsd->nfsd_slp == NULL &&
 473                             (nfsd_head_flag & NFSD_CHECKSLP) != 0) {
 474                                 TAILQ_FOREACH(slp, &nfssvc_sockhead, ns_chain) {
 475                                     if ((slp->ns_flag & (SLP_VALID | SLP_DOREC))
 476                                         == (SLP_VALID | SLP_DOREC)) {
 477                                             slp->ns_flag &= ~SLP_DOREC;
 478                                             slp->ns_sref++;
 479                                             nfsd->nfsd_slp = slp;
 480                                             break;
 481                                     }
 482                                 }
 483                                 if (slp == 0)
 484                                         nfsd_head_flag &= ~NFSD_CHECKSLP;
 485                         }
 486                         if ((slp = nfsd->nfsd_slp) == NULL)
 487                                 continue;
 488                         if (slp->ns_flag & SLP_VALID) {
 489                                 if (slp->ns_flag & SLP_DISCONN)
 490                                         nfsrv_zapsock(slp);
 491                                 else if (slp->ns_flag & SLP_NEEDQ) {
 492                                         slp->ns_flag &= ~SLP_NEEDQ;
 493                                         (void) nfs_slplock(slp, 1);
 494                                         nfsrv_rcv(slp->ns_so, (caddr_t)slp,
 495                                                 MB_WAIT);
 496                                         nfs_slpunlock(slp);
 497                                 }
 498                                 error = nfsrv_dorec(slp, nfsd, &nd);
 499                                 cur_usec = nfs_curusec();
 500                                 if (error && slp->ns_tq.lh_first &&
 501                                     slp->ns_tq.lh_first->nd_time <= cur_usec) {
 502                                         error = 0;
 503                                         cacherep = RC_DOIT;
 504                                         writes_todo = 1;
 505                                 } else
 506                                         writes_todo = 0;
 507                                 nfsd->nfsd_flag |= NFSD_REQINPROG;
 508                         }
 509                 } else {
 510                         error = 0;
 511                         slp = nfsd->nfsd_slp;
 512                 }
 513                 if (error || (slp->ns_flag & SLP_VALID) == 0) {
 514                         if (nd) {
 515                                 kfree((caddr_t)nd, M_NFSRVDESC);
 516                                 nd = NULL;
 517                         }
 518                         nfsd->nfsd_slp = NULL;
 519                         nfsd->nfsd_flag &= ~NFSD_REQINPROG;
 520                         nfsrv_slpderef(slp);
 521                         continue;
 522                 }
 523                 crit_exit();
 524                 sotype = slp->ns_so->so_type;
 525                 if (nd) {
 526                     getmicrotime(&nd->nd_starttime);
 527                     if (nd->nd_nam2)
 528                         nd->nd_nam = nd->nd_nam2;
 529                     else
 530                         nd->nd_nam = slp->ns_nam;
 531
 532                     /*
 533                      * Check to see if authorization is needed.
 534                      */
 535                     if (nfsd->nfsd_flag & NFSD_NEEDAUTH) {
 536                         nfsd->nfsd_flag &= ~NFSD_NEEDAUTH;
 537                         nsd->nsd_haddr =
 538                                 ((struct sockaddr_in *)
 539                                  nd->nd_nam)->sin_addr.s_addr;
 540                         nsd->nsd_authlen = nfsd->nfsd_authlen;
 541                         nsd->nsd_verflen = nfsd->nfsd_verflen;
 542                         if (!copyout(nfsd->nfsd_authstr,nsd->nsd_authstr,
 543                                 nfsd->nfsd_authlen) &&
 544                             !copyout(nfsd->nfsd_verfstr, nsd->nsd_verfstr,
 545                                 nfsd->nfsd_verflen) &&
 546                             !copyout((caddr_t)nsd, argp, sizeof (*nsd)))
 547                             return (ENEEDAUTH);
 548                         cacherep = RC_DROPIT;
 549                     } else {
 550                         cacherep = nfsrv_getcache(nd, slp, &mreq);
 551                     }
 552
 553                     if (nfsd->nfsd_flag & NFSD_AUTHFAIL) {
 554                         nfsd->nfsd_flag &= ~NFSD_AUTHFAIL;
 555                         nd->nd_procnum = NFSPROC_NOOP;
 556                         nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
 557                         cacherep = RC_DOIT;
 558                     } else if (nfs_privport) {
 559                         /* Check if source port is privileged */
 560                         u_short port;
 561                         struct sockaddr *nam = nd->nd_nam;
 562                         struct sockaddr_in *sin;
 563
 564                         sin = (struct sockaddr_in *)nam;
 565                         port = ntohs(sin->sin_port);
 566                         if (port >= IPPORT_RESERVED &&
 567                             nd->nd_procnum != NFSPROC_NULL) {
 568                             nd->nd_procnum = NFSPROC_NOOP;
 569                             nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
 570                             cacherep = RC_DOIT;
 571                             kprintf("NFS request from unprivileged port (%s:%d)\n",
 572                                    inet_ntoa(sin->sin_addr), port);
 573                         }
 574                     }
 575
 576                 }
 577
 578                 /*
 579                  * Loop to get all the write rpc relies that have been
 580                  * gathered together.
 581                  */
 582                 do {
 583                     switch (cacherep) {
 584                     case RC_DOIT:
 585                         if (nd && (nd->nd_flag & ND_NFSV3))
 586                             procrastinate = nfsrvw_procrastinate_v3;
 587                         else
 588                             procrastinate = nfsrvw_procrastinate;
 589                         if (writes_todo || (nd->nd_procnum == NFSPROC_WRITE &&
 590                             procrastinate > 0)
 591                         ) {
 592                             error = nfsrv_writegather(&nd, slp,
 593                                 nfsd->nfsd_td, &mreq);
 594                         } else {
 595                             error = (*(nfsrv3_procs[nd->nd_procnum]))(nd,
 596                                 slp, nfsd->nfsd_td, &mreq);
 597                         }
 598                         if (mreq == NULL)
 599                                 break;
 600                         if (error != 0 && error != NFSERR_RETVOID) {
 601                                 if (nd->nd_procnum != NQNFSPROC_VACATED)
 602                                         nfsstats.srv_errs++;
 603                                 nfsrv_updatecache(nd, FALSE, mreq);
 604                                 if (nd->nd_nam2)
 605                                         FREE(nd->nd_nam2, M_SONAME);
 606                                 break;
 607                         }
 608                         nfsstats.srvrpccnt[nd->nd_procnum]++;
 609                         nfsrv_updatecache(nd, TRUE, mreq);
 610                         nd->nd_mrep = NULL;
 611                     case RC_REPLY:
 612                         m = mreq;
 613                         siz = 0;
 614                         while (m) {
 615                                 siz += m->m_len;
 616                                 m = m->m_next;
 617                         }
 618                         if (siz <= 0 || siz > NFS_MAXPACKET) {
 619                                 kprintf("mbuf siz=%d\n",siz);
 620                                 panic("Bad nfs svc reply");
 621                         }
 622                         m = mreq;
 623                         m->m_pkthdr.len = siz;
 624                         m->m_pkthdr.rcvif = NULL;
 625                         /*
 626                          * For stream protocols, prepend a Sun RPC
 627                          * Record Mark.
 628                          */
 629                         if (sotype == SOCK_STREAM) {
 630                                 M_PREPEND(m, NFSX_UNSIGNED, MB_WAIT);
 631                                 if (m == NULL)
 632                                         return (ENOBUFS);
 633                                 *mtod(m, u_int32_t *) = htonl(0x80000000 | siz);
 634                         }
 635                         if (slp->ns_so->so_proto->pr_flags & PR_CONNREQUIRED)
 636                                 (void) nfs_slplock(slp, 1);
 637                         if (slp->ns_flag & SLP_VALID)
 638                             error = nfs_send(slp->ns_so, nd->nd_nam2, m, NULL);
 639                         else {
 640                             error = EPIPE;
 641                             m_freem(m);
 642                         }
 643                         if (nfsrtton)
 644                                 nfsd_rt(sotype, nd, cacherep);
 645                         if (nd->nd_nam2)
 646                                 FREE(nd->nd_nam2, M_SONAME);
 647                         if (nd->nd_mrep)
 648                                 m_freem(nd->nd_mrep);
 649                         if (error == EPIPE)
 650                                 nfsrv_zapsock(slp);
 651                         if (slp->ns_so->so_proto->pr_flags & PR_CONNREQUIRED)
 652                                 nfs_slpunlock(slp);
 653                         if (error == EINTR || error == ERESTART) {
 654                                 kfree((caddr_t)nd, M_NFSRVDESC);
 655                                 nfsrv_slpderef(slp);
 656                                 crit_enter();
 657                                 goto done;
 658                         }
 659                         break;
 660                     case RC_DROPIT:
 661                         if (nfsrtton)
 662                                 nfsd_rt(sotype, nd, cacherep);
 663                         m_freem(nd->nd_mrep);
 664                         if (nd->nd_nam2)
 665                                 FREE(nd->nd_nam2, M_SONAME);
 666                         break;
 667                     };
 668                     if (nd) {
 669                         FREE((caddr_t)nd, M_NFSRVDESC);
 670                         nd = NULL;
 671                     }
 672
 673                     /*
 674                      * Check to see if there are outstanding writes that
 675                      * need to be serviced.
 676                      */
 677                     cur_usec = nfs_curusec();
 678                     crit_enter();
 679                     if (slp->ns_tq.lh_first &&
 680                         slp->ns_tq.lh_first->nd_time <= cur_usec) {
 681                         cacherep = RC_DOIT;
 682                         writes_todo = 1;
 683                     } else
 684                         writes_todo = 0;
 685                     crit_exit();
 686                 } while (writes_todo);
 687                 crit_enter();
 688                 if (nfsrv_dorec(slp, nfsd, &nd)) {
 689                         nfsd->nfsd_flag &= ~NFSD_REQINPROG;
 690                         nfsd->nfsd_slp = NULL;
 691                         nfsrv_slpderef(slp);
 692                 }
 693         }
 694 done:
 695         TAILQ_REMOVE(&nfsd_head, nfsd, nfsd_chain);
 696         crit_exit();
 697         kfree((caddr_t)nfsd, M_NFSD);
 698         nsd->nsd_nfsd = NULL;
 699         if (--nfs_numnfsd == 0)
 700                 nfsrv_init(TRUE);       /* Reinitialize everything */
 701         return (error);
 702 }
 703
 704 /*
 705  * Shut down a socket associated with an nfssvc_sock structure.
 706  * Should be called with the send lock set, if required.
 707  * The trick here is to increment the sref at the start, so that the nfsds
 708  * will stop using it and clear ns_flag at the end so that it will not be
 709  * reassigned during cleanup.
 710  */
 711 static void
 712 nfsrv_zapsock(struct nfssvc_sock *slp)
 713 {
 714         struct nfsuid *nuidp, *nnuidp;
 715         struct nfsrv_descript *nwp, *nnwp;
 716         struct socket *so;
 717         struct file *fp;
 718         struct nfsrv_rec *rec;
 719
 720         slp->ns_flag &= ~SLP_ALLFLAGS;
 721         fp = slp->ns_fp;
 722         if (fp) {
 723                 slp->ns_fp = NULL;
 724                 so = slp->ns_so;
 725                 so->so_rcv.ssb_flags &= ~SSB_UPCALL;
 726                 so->so_upcall = NULL;
 727                 so->so_upcallarg = NULL;
 728                 soshutdown(so, SHUT_RDWR);
 729                 closef(fp, NULL);
 730                 if (slp->ns_nam)
 731                         FREE(slp->ns_nam, M_SONAME);
 732                 m_freem(slp->ns_raw);
 733                 while ((rec = STAILQ_FIRST(&slp->ns_rec)) != NULL) {
 734                         --slp->ns_numrec;
 735                         STAILQ_REMOVE_HEAD(&slp->ns_rec, nr_link);
 736                         if (rec->nr_address)
 737                                 FREE(rec->nr_address, M_SONAME);
 738                         m_freem(rec->nr_packet);
 739                         kfree(rec, M_NFSRVDESC);
 740                 }
 741                 TAILQ_FOREACH_MUTABLE(nuidp, &slp->ns_uidlruhead, nu_lru,
 742                                       nnuidp) {
 743                         LIST_REMOVE(nuidp, nu_hash);
 744                         TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, nu_lru);
 745                         if (nuidp->nu_flag & NU_NAM)
 746                                 FREE(nuidp->nu_nam, M_SONAME);
 747                         kfree((caddr_t)nuidp, M_NFSUID);
 748                 }
 749                 crit_enter();
 750                 for (nwp = slp->ns_tq.lh_first; nwp; nwp = nnwp) {
 751                         nnwp = nwp->nd_tq.le_next;
 752                         LIST_REMOVE(nwp, nd_tq);
 753                         kfree((caddr_t)nwp, M_NFSRVDESC);
 754                 }
 755                 LIST_INIT(&slp->ns_tq);
 756                 crit_exit();
 757         }
 758 }
 759
 760 /*
 761  * Derefence a server socket structure. If it has no more references and
 762  * is no longer valid, you can throw it away.
 763  */
 764 void
 765 nfsrv_slpderef(struct nfssvc_sock *slp)
 766 {
 767         if (--(slp->ns_sref) == 0 && (slp->ns_flag & SLP_VALID) == 0) {
 768                 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain);
 769                 kfree((caddr_t)slp, M_NFSSVC);
 770         }
 771 }
 772
 773 /*
 774  * Lock a socket against others.
 775  *
 776  * Returns 0 on failure, 1 on success.
 777  */
 778 int
 779 nfs_slplock(struct nfssvc_sock *slp, int wait)
 780 {
 781         mtx_t mtx = &slp->ns_solock;
 782
 783         if (wait) {
 784                 mtx_lock_ex(mtx, "nfsslplck", 0, 0);
 785                 return(1);
 786         } else if (mtx_lock_ex_try(mtx) == 0) {
 787                 return(1);
 788         } else {
 789                 return(0);
 790         }
 791 }
 792
 793 /*
 794  * Unlock the stream socket for others.
 795  */
 796 void
 797 nfs_slpunlock(struct nfssvc_sock *slp)
 798 {
 799         mtx_t mtx = &slp->ns_solock;
 800
 801         mtx_unlock(mtx);
 802 }
 803
 804 /*
 805  * Initialize the data structures for the server.
 806  * Handshake with any new nfsds starting up to avoid any chance of
 807  * corruption.
 808  */
 809 void
 810 nfsrv_init(int terminating)
 811 {
 812         struct nfssvc_sock *slp, *nslp;
 813
 814         if (nfssvc_sockhead_flag & SLP_INIT)
 815                 panic("nfsd init");
 816         nfssvc_sockhead_flag |= SLP_INIT;
 817         if (terminating) {
 818                 TAILQ_FOREACH_MUTABLE(slp, &nfssvc_sockhead, ns_chain, nslp) {
 819                         if (slp->ns_flag & SLP_VALID)
 820                                 nfsrv_zapsock(slp);
 821                         TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain);
 822                         kfree((caddr_t)slp, M_NFSSVC);
 823                 }
 824                 nfsrv_cleancache();     /* And clear out server cache */
 825         } else
 826                 nfs_pub.np_valid = 0;
 827
 828         TAILQ_INIT(&nfssvc_sockhead);
 829         nfssvc_sockhead_flag &= ~SLP_INIT;
 830         if (nfssvc_sockhead_flag & SLP_WANTINIT) {
 831                 nfssvc_sockhead_flag &= ~SLP_WANTINIT;
 832                 wakeup((caddr_t)&nfssvc_sockhead);
 833         }
 834
 835         TAILQ_INIT(&nfsd_head);
 836         nfsd_head_flag &= ~NFSD_CHECKSLP;
 837
 838 #if 0
 839         nfs_udpsock = (struct nfssvc_sock *)
 840             kmalloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK | M_ZERO);
 841         mtx_init(&nfs_udpsock->ns_solock);
 842         STAILQ_INIT(&nfs_udpsock->ns_rec);
 843         TAILQ_INIT(&nfs_udpsock->ns_uidlruhead);
 844         TAILQ_INSERT_HEAD(&nfssvc_sockhead, nfs_udpsock, ns_chain);
 845
 846         nfs_cltpsock = (struct nfssvc_sock *)
 847             kmalloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK | M_ZERO);
 848         mtx_init(&nfs_cltpsock->ns_solock);
 849         STAILQ_INIT(&nfs_cltpsock->ns_rec);
 850         TAILQ_INIT(&nfs_cltpsock->ns_uidlruhead);
 851         TAILQ_INSERT_TAIL(&nfssvc_sockhead, nfs_cltpsock, ns_chain);
 852 #endif
 853 }
 854
 855 /*
 856  * Add entries to the server monitor log.
 857  */
 858 static void
 859 nfsd_rt(int sotype, struct nfsrv_descript *nd, int cacherep)
 860 {
 861         struct drt *rt;
 862
 863         rt = &nfsdrt.drt[nfsdrt.pos];
 864         if (cacherep == RC_DOIT)
 865                 rt->flag = 0;
 866         else if (cacherep == RC_REPLY)
 867                 rt->flag = DRT_CACHEREPLY;
 868         else
 869                 rt->flag = DRT_CACHEDROP;
 870         if (sotype == SOCK_STREAM)
 871                 rt->flag |= DRT_TCP;
 872         if (nd->nd_flag & ND_NFSV3)
 873                 rt->flag |= DRT_NFSV3;
 874         rt->proc = nd->nd_procnum;
 875         if (nd->nd_nam->sa_family == AF_INET)
 876             rt->ipadr = ((struct sockaddr_in *)nd->nd_nam)->sin_addr.s_addr;
 877         else
 878             rt->ipadr = INADDR_ANY;
 879         rt->resptime = nfs_curusec() - (nd->nd_starttime.tv_sec * 1000000 + nd->nd_starttime.tv_usec);
 880         getmicrotime(&rt->tstamp);
 881         nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ;
 882 }
 883 #endif /* NFS_NOSERVER */
 884
 885 static int nfs_defect = 0;
 886 SYSCTL_INT(_vfs_nfs, OID_AUTO, defect, CTLFLAG_RW, &nfs_defect, 0, "");
 887
 888 /*
 889  * Asynchronous I/O daemons for client nfs.
 890  * They do read-ahead and write-behind operations on the block I/O cache.
 891  * Never returns unless it fails or gets killed.
 892  */
 893 static int
 894 nfssvc_iod(struct thread *td)
 895 {
 896         struct bio *bio;
 897         int i, myiod;
 898         struct nfsmount *nmp;
 899         int error = 0;
 900
 901         /*
 902          * Assign my position or return error if too many already running
 903          */
 904         myiod = -1;
 905         for (i = 0; i < NFS_MAXASYNCDAEMON; i++)
 906                 if (nfs_asyncdaemon[i] == 0) {
 907                         nfs_asyncdaemon[i]++;
 908                         myiod = i;
 909                         break;
 910                 }
 911         if (myiod == -1)
 912                 return (EBUSY);
 913         nfs_numasync++;
 914         /*
 915          * Just loop around doin our stuff until SIGKILL
 916          */
 917         for (;;) {
 918             while (((nmp = nfs_iodmount[myiod]) == NULL
 919                      || TAILQ_EMPTY(&nmp->nm_bioq))
 920                    && error == 0) {
 921                 if (nmp)
 922                     nmp->nm_bioqiods--;
 923                 nfs_iodwant[myiod] = td;
 924                 nfs_iodmount[myiod] = NULL;
 925                 error = tsleep((caddr_t)&nfs_iodwant[myiod],
 926                         PCATCH, "nfsidl", 0);
 927             }
 928             if (error) {
 929                 nfs_asyncdaemon[myiod] = 0;
 930                 if (nmp)
 931                     nmp->nm_bioqiods--;
 932                 nfs_iodwant[myiod] = NULL;
 933                 nfs_iodmount[myiod] = NULL;
 934                 nfs_numasync--;
 935                 return (error);
 936             }
 937             while ((bio = TAILQ_FIRST(&nmp->nm_bioq)) != NULL) {
 938                 /*
 939                  * Take one off the front of the list.   The BIO's
 940                  * block number is normalized for DEV_BSIZE.
 941                  */
 942                 TAILQ_REMOVE(&nmp->nm_bioq, bio, bio_act);
 943                 nmp->nm_bioqlen--;
 944                 if (nmp->nm_bioqwant && nmp->nm_bioqlen <= nfs_numasync) {
 945                     nmp->nm_bioqwant = FALSE;
 946                     wakeup(&nmp->nm_bioq);
 947                 }
 948                 nfs_doio((struct vnode *)bio->bio_driver_info, bio, NULL);
 949
 950                 /*
 951                  * If there are more than one iod on this mount, then defect
 952                  * so that the iods can be shared out fairly between the mounts
 953                  */
 954                 if (nfs_defect && nmp->nm_bioqiods > 1) {
 955                     NFS_DPF(ASYNCIO,
 956                             ("nfssvc_iod: iod %d defecting from mount %p\n",
 957                              myiod, nmp));
 958                     nfs_iodmount[myiod] = NULL;
 959                     nmp->nm_bioqiods--;
 960                     break;
 961                 }
 962             }
 963         }
 964 }
 965
 966
 967 /*
 968  * Get an authorization string for the uid by having the mount_nfs sitting
 969  * on this mount point porpous out of the kernel and do it.
 970  */
 971 int
 972 nfs_getauth(struct nfsmount *nmp, struct nfsreq *rep,
 973             struct ucred *cred, char **auth_str, int *auth_len, char *verf_str,
 974             int *verf_len, NFSKERBKEY_T key /* return session key */)
 975 {
 976         int error = 0;
 977
 978         while ((nmp->nm_state & NFSSTA_WAITAUTH) == 0) {
 979                 nmp->nm_state |= NFSSTA_WANTAUTH;
 980                 (void) tsleep((caddr_t)&nmp->nm_authtype, 0,
 981                         "nfsauth1", 2 * hz);
 982                 error = nfs_sigintr(nmp, rep, rep->r_td);
 983                 if (error) {
 984                         nmp->nm_state &= ~NFSSTA_WANTAUTH;
 985                         return (error);
 986                 }
 987         }
 988         nmp->nm_state &= ~(NFSSTA_WAITAUTH | NFSSTA_WANTAUTH);
 989         nmp->nm_authstr = *auth_str = (char *)kmalloc(RPCAUTH_MAXSIZ, M_TEMP, M_WAITOK);
 990         nmp->nm_authlen = RPCAUTH_MAXSIZ;
 991         nmp->nm_verfstr = verf_str;
 992         nmp->nm_verflen = *verf_len;
 993         nmp->nm_authuid = cred->cr_uid;
 994         wakeup((caddr_t)&nmp->nm_authstr);
 995
 996         /*
 997          * And wait for mount_nfs to do its stuff.
 998          */
 999         while ((nmp->nm_state & NFSSTA_HASAUTH) == 0 && error == 0) {
1000                 (void) tsleep((caddr_t)&nmp->nm_authlen, 0,
1001                         "nfsauth2", 2 * hz);
1002                 error = nfs_sigintr(nmp, rep, rep->r_td);
1003         }
1004         if (nmp->nm_state & NFSSTA_AUTHERR) {
1005                 nmp->nm_state &= ~NFSSTA_AUTHERR;
1006                 error = EAUTH;
1007         }
1008         if (error)
1009                 kfree((caddr_t)*auth_str, M_TEMP);
1010         else {
1011                 *auth_len = nmp->nm_authlen;
1012                 *verf_len = nmp->nm_verflen;
1013                 bcopy((caddr_t)nmp->nm_key, (caddr_t)key, sizeof (key));
1014         }
1015         nmp->nm_state &= ~NFSSTA_HASAUTH;
1016         nmp->nm_state |= NFSSTA_WAITAUTH;
1017         if (nmp->nm_state & NFSSTA_WANTAUTH) {
1018                 nmp->nm_state &= ~NFSSTA_WANTAUTH;
1019                 wakeup((caddr_t)&nmp->nm_authtype);
1020         }
1021         return (error);
1022 }
1023
1024 /*
1025  * Get a nickname authenticator and verifier.
1026  */
1027 int
1028 nfs_getnickauth(struct nfsmount *nmp, struct ucred *cred, char **auth_str,
1029                 int *auth_len, char *verf_str, int verf_len)
1030 {
1031         struct nfsuid *nuidp;
1032         u_int32_t *nickp, *verfp;
1033         struct timeval ktvin, ktvout;
1034
1035 #ifdef DIAGNOSTIC
1036         if (verf_len < (4 * NFSX_UNSIGNED))
1037                 panic("nfs_getnickauth verf too small");
1038 #endif
1039         for (nuidp = NMUIDHASH(nmp, cred->cr_uid)->lh_first;
1040             nuidp != 0; nuidp = nuidp->nu_hash.le_next) {
1041                 if (nuidp->nu_cr.cr_uid == cred->cr_uid)
1042                         break;
1043         }
1044         if (!nuidp || nuidp->nu_expire < time_second)
1045                 return (EACCES);
1046
1047         /*
1048          * Move to the end of the lru list (end of lru == most recently used).
1049          */
1050         TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru);
1051         TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, nu_lru);
1052
1053         nickp = (u_int32_t *)kmalloc(2 * NFSX_UNSIGNED, M_TEMP, M_WAITOK);
1054         *nickp++ = txdr_unsigned(RPCAKN_NICKNAME);
1055         *nickp = txdr_unsigned(nuidp->nu_nickname);
1056         *auth_str = (char *)nickp;
1057         *auth_len = 2 * NFSX_UNSIGNED;
1058
1059         /*
1060          * Now we must encrypt the verifier and package it up.
1061          */
1062         verfp = (u_int32_t *)verf_str;
1063         *verfp++ = txdr_unsigned(RPCAKN_NICKNAME);
1064         if (time_second > nuidp->nu_timestamp.tv_sec ||
1065             (time_second == nuidp->nu_timestamp.tv_sec &&
1066              time_second > nuidp->nu_timestamp.tv_usec))
1067                 getmicrotime(&nuidp->nu_timestamp);
1068         else
1069                 nuidp->nu_timestamp.tv_usec++;
1070         ktvin.tv_sec = txdr_unsigned(nuidp->nu_timestamp.tv_sec);
1071         ktvin.tv_usec = txdr_unsigned(nuidp->nu_timestamp.tv_usec);
1072
1073         /*
1074          * Now encrypt the timestamp verifier in ecb mode using the session
1075          * key.
1076          */
1077 #ifdef NFSKERB
1078         XXX
1079 #endif
1080
1081         *verfp++ = ktvout.tv_sec;
1082         *verfp++ = ktvout.tv_usec;
1083         *verfp = 0;
1084         return (0);
1085 }
1086
1087 /*
1088  * Save the current nickname in a hash list entry on the mount point.
1089  */
1090 int
1091 nfs_savenickauth(struct nfsmount *nmp, struct ucred *cred, int len,
1092                  NFSKERBKEY_T key, struct mbuf **mdp, char **dposp,
1093                  struct mbuf *mrep)
1094 {
1095         struct nfsuid *nuidp;
1096         u_int32_t *tl;
1097         int32_t t1;
1098         struct mbuf *md = *mdp;
1099         struct timeval ktvin, ktvout;
1100         u_int32_t nick;
1101         char *dpos = *dposp, *cp2;
1102         int deltasec, error = 0;
1103
1104         if (len == (3 * NFSX_UNSIGNED)) {
1105                 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
1106                 ktvin.tv_sec = *tl++;
1107                 ktvin.tv_usec = *tl++;
1108                 nick = fxdr_unsigned(u_int32_t, *tl);
1109
1110                 /*
1111                  * Decrypt the timestamp in ecb mode.
1112                  */
1113 #ifdef NFSKERB
1114                 XXX
1115 #endif
1116                 ktvout.tv_sec = fxdr_unsigned(long, ktvout.tv_sec);
1117                 ktvout.tv_usec = fxdr_unsigned(long, ktvout.tv_usec);
1118                 deltasec = time_second - ktvout.tv_sec;
1119                 if (deltasec < 0)
1120                         deltasec = -deltasec;
1121                 /*
1122                  * If ok, add it to the hash list for the mount point.
1123                  */
1124                 if (deltasec <= NFS_KERBCLOCKSKEW) {
1125                         if (nmp->nm_numuids < nuidhash_max) {
1126                                 nmp->nm_numuids++;
1127                                 nuidp = (struct nfsuid *)
1128                                    kmalloc(sizeof (struct nfsuid), M_NFSUID,
1129                                         M_WAITOK);
1130                         } else {
1131                                 nuidp = TAILQ_FIRST(&nmp->nm_uidlruhead);
1132                                 LIST_REMOVE(nuidp, nu_hash);
1133                                 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp,
1134                                         nu_lru);
1135                         }
1136                         nuidp->nu_flag = 0;
1137                         nuidp->nu_cr.cr_uid = cred->cr_uid;
1138                         nuidp->nu_expire = time_second + NFS_KERBTTL;
1139                         nuidp->nu_timestamp = ktvout;
1140                         nuidp->nu_nickname = nick;
1141                         bcopy(key, nuidp->nu_key, sizeof (key));
1142                         TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp,
1143                                 nu_lru);
1144                         LIST_INSERT_HEAD(NMUIDHASH(nmp, cred->cr_uid),
1145                                 nuidp, nu_hash);
1146                 }
1147         } else
1148                 nfsm_adv(nfsm_rndup(len));
1149 nfsmout:
1150         *mdp = md;
1151         *dposp = dpos;
1152         return (error);
1153 }