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 1.12 2004/03/05 16:57:16 hsu 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/buf.h>
  53 #include <sys/mbuf.h>
  54 #include <sys/resourcevar.h>
  55 #include <sys/socket.h>
  56 #include <sys/socketvar.h>
  57 #include <sys/domain.h>
  58 #include <sys/protosw.h>
  59 #include <sys/namei.h>
  60 #include <vm/vm_zone.h>
  61
  62 #include <netinet/in.h>
  63 #include <netinet/tcp.h>
  64 #include "xdr_subs.h"
  65 #include "rpcv2.h"
  66 #include "nfsproto.h"
  67 #include "nfs.h"
  68 #include "nfsm_subs.h"
  69 #include "nfsrvcache.h"
  70 #include "nfsmount.h"
  71 #include "nfsnode.h"
  72 #include "nqnfs.h"
  73 #include "nfsrtt.h"
  74
  75 static MALLOC_DEFINE(M_NFSSVC, "NFS srvsock", "Nfs server structure");
  76
  77 /* Global defs. */
  78 extern int32_t (*nfsrv3_procs[NFS_NPROCS]) (struct nfsrv_descript *nd,
  79                                             struct nfssvc_sock *slp,
  80                                             struct thread *td,
  81                                             struct mbuf **mreqp);
  82 extern int nfs_numasync;
  83 extern time_t nqnfsstarttime;
  84 extern int nqsrv_writeslack;
  85 extern int nfsrtton;
  86 extern struct nfsstats nfsstats;
  87 extern int nfsrvw_procrastinate;
  88 extern int nfsrvw_procrastinate_v3;
  89 static int nuidhash_max = NFS_MAXUIDHASH;
  90
  91 #ifndef NFS_NOSERVER
  92 static void     nfsrv_zapsock (struct nfssvc_sock *slp);
  93 #endif
  94 static int      nfssvc_iod (struct thread *);
  95
  96 #define TRUE    1
  97 #define FALSE   0
  98
  99 static int nfs_asyncdaemon[NFS_MAXASYNCDAEMON];
 100
 101 SYSCTL_DECL(_vfs_nfs);
 102
 103 #ifndef NFS_NOSERVER
 104 int nfsd_waiting = 0;
 105 static struct nfsdrt nfsdrt;
 106 static int nfs_numnfsd = 0;
 107 static int notstarted = 1;
 108 static int modify_flag = 0;
 109 static void     nfsd_rt (int sotype, struct nfsrv_descript *nd,
 110                              int cacherep);
 111 static int      nfssvc_addsock (struct file *, struct sockaddr *,
 112                                     struct thread *);
 113 static int      nfssvc_nfsd (struct nfsd_srvargs *,caddr_t,struct thread *);
 114
 115 static int nfs_privport = 0;
 116 SYSCTL_INT(_vfs_nfs, NFS_NFSPRIVPORT, nfs_privport, CTLFLAG_RW, &nfs_privport, 0, "");
 117 SYSCTL_INT(_vfs_nfs, OID_AUTO, gatherdelay, CTLFLAG_RW, &nfsrvw_procrastinate, 0, "");
 118 SYSCTL_INT(_vfs_nfs, OID_AUTO, gatherdelay_v3, CTLFLAG_RW, &nfsrvw_procrastinate_v3, 0, "");
 119
 120 /*
 121  * NFS server system calls
 122  */
 123
 124 #endif /* NFS_NOSERVER */
 125 /*
 126  * nfssvc_args(int flag, caddr_t argp)
 127  *
 128  * Nfs server psuedo system call for the nfsd's
 129  * Based on the flag value it either:
 130  * - adds a socket to the selection list
 131  * - remains in the kernel as an nfsd
 132  * - remains in the kernel as an nfsiod
 133  */
 134 int
 135 nfssvc(struct nfssvc_args *uap)
 136 {
 137 #ifndef NFS_NOSERVER
 138         struct nameidata nd;
 139         struct file *fp;
 140         struct sockaddr *nam;
 141         struct nfsd_args nfsdarg;
 142         struct nfsd_srvargs nfsd_srvargs, *nsd = &nfsd_srvargs;
 143         struct nfsd_cargs ncd;
 144         struct nfsd *nfsd;
 145         struct nfssvc_sock *slp;
 146         struct nfsuid *nuidp;
 147         struct nfsmount *nmp;
 148 #endif /* NFS_NOSERVER */
 149         int error;
 150         struct thread *td = curthread;
 151
 152         /*
 153          * Must be super user
 154          */
 155         error = suser(td);
 156         if(error)
 157                 return (error);
 158         KKASSERT(td->td_proc);  /* for ucred and p_fd */
 159         while (nfssvc_sockhead_flag & SLP_INIT) {
 160                  nfssvc_sockhead_flag |= SLP_WANTINIT;
 161                 (void) tsleep((caddr_t)&nfssvc_sockhead, 0, "nfsd init", 0);
 162         }
 163         if (uap->flag & NFSSVC_BIOD)
 164                 error = nfssvc_iod(td);
 165 #ifdef NFS_NOSERVER
 166         else
 167                 error = ENXIO;
 168 #else /* !NFS_NOSERVER */
 169         else if (uap->flag & NFSSVC_MNTD) {
 170                 error = copyin(uap->argp, (caddr_t)&ncd, sizeof (ncd));
 171                 if (error)
 172                         return (error);
 173                 NDINIT(&nd, NAMEI_LOOKUP, CNP_FOLLOW | CNP_LOCKLEAF,
 174                         UIO_USERSPACE, ncd.ncd_dirp, td);
 175                 error = namei(&nd);
 176                 if (error)
 177                         return (error);
 178                 NDFREE(&nd, NDF_ONLY_PNBUF);
 179                 if ((nd.ni_vp->v_flag & VROOT) == 0)
 180                         error = EINVAL;
 181                 nmp = VFSTONFS(nd.ni_vp->v_mount);
 182                 vput(nd.ni_vp);
 183                 if (error)
 184                         return (error);
 185                 if ((nmp->nm_state & NFSSTA_MNTD) &&
 186                         (uap->flag & NFSSVC_GOTAUTH) == 0)
 187                         return (0);
 188                 nmp->nm_state |= NFSSTA_MNTD;
 189                 error = nqnfs_clientd(nmp, td->td_proc->p_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                         return (error);
 195                 error = holdsock(td->td_proc->p_fd, nfsdarg.sock, &fp);
 196                 if (error)
 197                         return (error);
 198                 /*
 199                  * Get the client address for connected sockets.
 200                  */
 201                 if (nfsdarg.name == NULL || nfsdarg.namelen == 0)
 202                         nam = (struct sockaddr *)0;
 203                 else {
 204                         error = getsockaddr(&nam, nfsdarg.name,
 205                                             nfsdarg.namelen);
 206                         if (error) {
 207                                 fdrop(fp, td);
 208                                 return (error);
 209                         }
 210                 }
 211                 error = nfssvc_addsock(fp, nam, td);
 212                 fdrop(fp, td);
 213         } else {
 214                 error = copyin(uap->argp, (caddr_t)nsd, sizeof (*nsd));
 215                 if (error)
 216                         return (error);
 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                                    malloc(sizeof (struct nfsuid), M_NFSUID,
 245                                         M_WAITOK);
 246                             } else
 247                                 nuidp = (struct nfsuid *)0;
 248                             if ((slp->ns_flag & SLP_VALID) == 0) {
 249                                 if (nuidp)
 250                                     free((caddr_t)nuidp, M_NFSUID);
 251                             } else {
 252                                 if (nuidp == (struct nfsuid *)0) {
 253                                     nuidp = slp->ns_uidlruhead.tqh_first;
 254                                     LIST_REMOVE(nuidp, nu_hash);
 255                                     TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp,
 256                                         nu_lru);
 257                                     if (nuidp->nu_flag & NU_NAM)
 258                                         FREE(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->
 288                                                              nd_nam2, 1);
 289                                         break;
 290                                     };
 291                                 }
 292                                 TAILQ_INSERT_TAIL(&slp->ns_uidlruhead, nuidp,
 293                                         nu_lru);
 294                                 LIST_INSERT_HEAD(NUIDHASH(slp, nsd->nsd_uid),
 295                                         nuidp, nu_hash);
 296                                 nfsrv_setcred(&nuidp->nu_cr,
 297                                     &nfsd->nfsd_nd->nd_cr);
 298                                 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL;
 299                             }
 300                         }
 301                 }
 302                 if ((uap->flag & NFSSVC_AUTHINFAIL) && (nfsd = nsd->nsd_nfsd))
 303                         nfsd->nfsd_flag |= NFSD_AUTHFAIL;
 304                 error = nfssvc_nfsd(nsd, uap->argp, td);
 305         }
 306 #endif /* NFS_NOSERVER */
 307         if (error == EINTR || error == ERESTART)
 308                 error = 0;
 309         return (error);
 310 }
 311
 312 #ifndef NFS_NOSERVER
 313 /*
 314  * Adds a socket to the list for servicing by nfsds.
 315  */
 316 static int
 317 nfssvc_addsock(struct file *fp, struct sockaddr *mynam, struct thread *td)
 318 {
 319         int siz;
 320         struct nfssvc_sock *slp;
 321         struct socket *so;
 322         int error, s;
 323
 324         so = (struct socket *)fp->f_data;
 325 #if 0
 326         tslp = (struct nfssvc_sock *)0;
 327         /*
 328          * Add it to the list, as required.
 329          */
 330         if (so->so_proto->pr_protocol == IPPROTO_UDP) {
 331                 tslp = nfs_udpsock;
 332                 if (tslp->ns_flag & SLP_VALID) {
 333                         if (mynam != NULL)
 334                                 FREE(mynam, M_SONAME);
 335                         return (EPERM);
 336                 }
 337         }
 338 #endif
 339         if (so->so_type == SOCK_STREAM)
 340                 siz = NFS_MAXPACKET + sizeof (u_long);
 341         else
 342                 siz = NFS_MAXPACKET;
 343         error = soreserve(so, siz, siz, &td->td_proc->p_rlimit[RLIMIT_SBSIZE]);
 344         if (error) {
 345                 if (mynam != NULL)
 346                         FREE(mynam, M_SONAME);
 347                 return (error);
 348         }
 349
 350         /*
 351          * Set protocol specific options { for now TCP only } and
 352          * reserve some space. For datagram sockets, this can get called
 353          * repeatedly for the same socket, but that isn't harmful.
 354          */
 355         if (so->so_type == SOCK_STREAM) {
 356                 struct sockopt sopt;
 357                 int val;
 358
 359                 bzero(&sopt, sizeof sopt);
 360                 sopt.sopt_level = SOL_SOCKET;
 361                 sopt.sopt_name = SO_KEEPALIVE;
 362                 sopt.sopt_val = &val;
 363                 sopt.sopt_valsize = sizeof val;
 364                 val = 1;
 365                 sosetopt(so, &sopt);
 366         }
 367         if (so->so_proto->pr_domain->dom_family == AF_INET &&
 368             so->so_proto->pr_protocol == IPPROTO_TCP) {
 369                 struct sockopt sopt;
 370                 int val;
 371
 372                 bzero(&sopt, sizeof sopt);
 373                 sopt.sopt_level = IPPROTO_TCP;
 374                 sopt.sopt_name = TCP_NODELAY;
 375                 sopt.sopt_val = &val;
 376                 sopt.sopt_valsize = sizeof val;
 377                 val = 1;
 378                 sosetopt(so, &sopt);
 379         }
 380         so->so_rcv.sb_flags &= ~SB_NOINTR;
 381         so->so_rcv.sb_timeo = 0;
 382         so->so_snd.sb_flags &= ~SB_NOINTR;
 383         so->so_snd.sb_timeo = 0;
 384
 385         slp = (struct nfssvc_sock *)
 386                 malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK);
 387         bzero((caddr_t)slp, sizeof (struct nfssvc_sock));
 388         STAILQ_INIT(&slp->ns_rec);
 389         TAILQ_INIT(&slp->ns_uidlruhead);
 390         TAILQ_INSERT_TAIL(&nfssvc_sockhead, slp, ns_chain);
 391
 392         slp->ns_so = so;
 393         slp->ns_nam = mynam;
 394         fp->f_count++;
 395         slp->ns_fp = fp;
 396         s = splnet();
 397         so->so_upcallarg = (caddr_t)slp;
 398         so->so_upcall = nfsrv_rcv;
 399         so->so_rcv.sb_flags |= SB_UPCALL;
 400         slp->ns_flag = (SLP_VALID | SLP_NEEDQ);
 401         nfsrv_wakenfsd(slp);
 402         splx(s);
 403         return (0);
 404 }
 405
 406 /*
 407  * Called by nfssvc() for nfsds. Just loops around servicing rpc requests
 408  * until it is killed by a signal.
 409  */
 410 static int
 411 nfssvc_nfsd(struct nfsd_srvargs *nsd, caddr_t argp, struct thread *td)
 412 {
 413         int siz;
 414         struct nfssvc_sock *slp;
 415         struct nfsd *nfsd = nsd->nsd_nfsd;
 416         struct nfsrv_descript *nd = NULL;
 417         struct mbuf *m, *mreq;
 418         int error = 0, cacherep, s, sotype, writes_todo;
 419         int procrastinate;
 420         u_quad_t cur_usec;
 421
 422 #ifndef nolint
 423         cacherep = RC_DOIT;
 424         writes_todo = 0;
 425 #endif
 426         if (nfsd == (struct nfsd *)0) {
 427                 nsd->nsd_nfsd = nfsd = (struct nfsd *)
 428                         malloc(sizeof (struct nfsd), M_NFSD, M_WAITOK);
 429                 bzero((caddr_t)nfsd, sizeof (struct nfsd));
 430                 s = splnet();
 431                 nfsd->nfsd_td = td;
 432                 TAILQ_INSERT_TAIL(&nfsd_head, nfsd, nfsd_chain);
 433                 nfs_numnfsd++;
 434         } else
 435                 s = splnet();
 436
 437         /*
 438          * Loop getting rpc requests until SIGKILL.
 439          */
 440         for (;;) {
 441                 if ((nfsd->nfsd_flag & NFSD_REQINPROG) == 0) {
 442                         while (nfsd->nfsd_slp == (struct nfssvc_sock *)0 &&
 443                             (nfsd_head_flag & NFSD_CHECKSLP) == 0) {
 444                                 nfsd->nfsd_flag |= NFSD_WAITING;
 445                                 nfsd_waiting++;
 446                                 error = tsleep((caddr_t)nfsd, PCATCH, "nfsd", 0);
 447                                 nfsd_waiting--;
 448                                 if (error)
 449                                         goto done;
 450                         }
 451                         if (nfsd->nfsd_slp == (struct nfssvc_sock *)0 &&
 452                             (nfsd_head_flag & NFSD_CHECKSLP) != 0) {
 453                                 for (slp = nfssvc_sockhead.tqh_first; slp != 0;
 454                                     slp = slp->ns_chain.tqe_next) {
 455                                     if ((slp->ns_flag & (SLP_VALID | SLP_DOREC))
 456                                         == (SLP_VALID | SLP_DOREC)) {
 457                                             slp->ns_flag &= ~SLP_DOREC;
 458                                             slp->ns_sref++;
 459                                             nfsd->nfsd_slp = slp;
 460                                             break;
 461                                     }
 462                                 }
 463                                 if (slp == 0)
 464                                         nfsd_head_flag &= ~NFSD_CHECKSLP;
 465                         }
 466                         if ((slp = nfsd->nfsd_slp) == (struct nfssvc_sock *)0)
 467                                 continue;
 468                         if (slp->ns_flag & SLP_VALID) {
 469                                 if (slp->ns_flag & SLP_DISCONN)
 470                                         nfsrv_zapsock(slp);
 471                                 else if (slp->ns_flag & SLP_NEEDQ) {
 472                                         slp->ns_flag &= ~SLP_NEEDQ;
 473                                         (void) nfs_slplock(slp, 1);
 474                                         nfsrv_rcv(slp->ns_so, (caddr_t)slp,
 475                                                 M_WAIT);
 476                                         nfs_slpunlock(slp);
 477                                 }
 478                                 error = nfsrv_dorec(slp, nfsd, &nd);
 479                                 cur_usec = nfs_curusec();
 480                                 if (error && slp->ns_tq.lh_first &&
 481                                     slp->ns_tq.lh_first->nd_time <= cur_usec) {
 482                                         error = 0;
 483                                         cacherep = RC_DOIT;
 484                                         writes_todo = 1;
 485                                 } else
 486                                         writes_todo = 0;
 487                                 nfsd->nfsd_flag |= NFSD_REQINPROG;
 488                         }
 489                 } else {
 490                         error = 0;
 491                         slp = nfsd->nfsd_slp;
 492                 }
 493                 if (error || (slp->ns_flag & SLP_VALID) == 0) {
 494                         if (nd) {
 495                                 free((caddr_t)nd, M_NFSRVDESC);
 496                                 nd = NULL;
 497                         }
 498                         nfsd->nfsd_slp = (struct nfssvc_sock *)0;
 499                         nfsd->nfsd_flag &= ~NFSD_REQINPROG;
 500                         nfsrv_slpderef(slp);
 501                         continue;
 502                 }
 503                 splx(s);
 504                 sotype = slp->ns_so->so_type;
 505                 if (nd) {
 506                     getmicrotime(&nd->nd_starttime);
 507                     if (nd->nd_nam2)
 508                         nd->nd_nam = nd->nd_nam2;
 509                     else
 510                         nd->nd_nam = slp->ns_nam;
 511
 512                     /*
 513                      * Check to see if authorization is needed.
 514                      */
 515                     if (nfsd->nfsd_flag & NFSD_NEEDAUTH) {
 516                         nfsd->nfsd_flag &= ~NFSD_NEEDAUTH;
 517                         nsd->nsd_haddr =
 518                                 ((struct sockaddr_in *)
 519                                  nd->nd_nam)->sin_addr.s_addr;
 520                         nsd->nsd_authlen = nfsd->nfsd_authlen;
 521                         nsd->nsd_verflen = nfsd->nfsd_verflen;
 522                         if (!copyout(nfsd->nfsd_authstr,nsd->nsd_authstr,
 523                                 nfsd->nfsd_authlen) &&
 524                             !copyout(nfsd->nfsd_verfstr, nsd->nsd_verfstr,
 525                                 nfsd->nfsd_verflen) &&
 526                             !copyout((caddr_t)nsd, argp, sizeof (*nsd)))
 527                             return (ENEEDAUTH);
 528                         cacherep = RC_DROPIT;
 529                     } else
 530                         cacherep = nfsrv_getcache(nd, slp, &mreq);
 531
 532                     /*
 533                      * Check for just starting up for NQNFS and send
 534                      * fake "try again later" replies to the NQNFS clients.
 535                      */
 536                     if (notstarted && nqnfsstarttime <= time_second) {
 537                         if (modify_flag) {
 538                                 nqnfsstarttime = time_second + nqsrv_writeslack;
 539                                 modify_flag = 0;
 540                         } else
 541                                 notstarted = 0;
 542                     }
 543                     if (notstarted) {
 544                         if ((nd->nd_flag & ND_NQNFS) == 0)
 545                                 cacherep = RC_DROPIT;
 546                         else if (nd->nd_procnum != NFSPROC_WRITE) {
 547                                 nd->nd_procnum = NFSPROC_NOOP;
 548                                 nd->nd_repstat = NQNFS_TRYLATER;
 549                                 cacherep = RC_DOIT;
 550                         } else
 551                                 modify_flag = 1;
 552                     } else if (nfsd->nfsd_flag & NFSD_AUTHFAIL) {
 553                         nfsd->nfsd_flag &= ~NFSD_AUTHFAIL;
 554                         nd->nd_procnum = NFSPROC_NOOP;
 555                         nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
 556                         cacherep = RC_DOIT;
 557                     } else if (nfs_privport) {
 558                         /* Check if source port is privileged */
 559                         u_short port;
 560                         struct sockaddr *nam = nd->nd_nam;
 561                         struct sockaddr_in *sin;
 562
 563                         sin = (struct sockaddr_in *)nam;
 564                         port = ntohs(sin->sin_port);
 565                         if (port >= IPPORT_RESERVED &&
 566                             nd->nd_procnum != NFSPROC_NULL) {
 567                             nd->nd_procnum = NFSPROC_NOOP;
 568                             nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
 569                             cacherep = RC_DOIT;
 570                             printf("NFS request from unprivileged port (%s:%d)\n",
 571                                    inet_ntoa(sin->sin_addr), port);
 572                         }
 573                     }
 574
 575                 }
 576
 577                 /*
 578                  * Loop to get all the write rpc relies that have been
 579                  * gathered together.
 580                  */
 581                 do {
 582                     switch (cacherep) {
 583                     case RC_DOIT:
 584                         if (nd && (nd->nd_flag & ND_NFSV3))
 585                             procrastinate = nfsrvw_procrastinate_v3;
 586                         else
 587                             procrastinate = nfsrvw_procrastinate;
 588                         if (writes_todo || (nd->nd_procnum == NFSPROC_WRITE &&
 589                             procrastinate > 0 && !notstarted))
 590                             error = nfsrv_writegather(&nd, slp,
 591                                 nfsd->nfsd_td, &mreq);
 592                         else
 593                             error = (*(nfsrv3_procs[nd->nd_procnum]))(nd,
 594                                 slp, nfsd->nfsd_td, &mreq);
 595                         if (mreq == NULL)
 596                                 break;
 597                         if (error != 0 && error != NFSERR_RETVOID) {
 598                                 if (nd->nd_procnum != NQNFSPROC_VACATED)
 599                                         nfsstats.srv_errs++;
 600                                 nfsrv_updatecache(nd, FALSE, mreq);
 601                                 if (nd->nd_nam2)
 602                                         FREE(nd->nd_nam2, M_SONAME);
 603                                 break;
 604                         }
 605                         nfsstats.srvrpccnt[nd->nd_procnum]++;
 606                         nfsrv_updatecache(nd, TRUE, mreq);
 607                         nd->nd_mrep = (struct mbuf *)0;
 608                     case RC_REPLY:
 609                         m = mreq;
 610                         siz = 0;
 611                         while (m) {
 612                                 siz += m->m_len;
 613                                 m = m->m_next;
 614                         }
 615                         if (siz <= 0 || siz > NFS_MAXPACKET) {
 616                                 printf("mbuf siz=%d\n",siz);
 617                                 panic("Bad nfs svc reply");
 618                         }
 619                         m = mreq;
 620                         m->m_pkthdr.len = siz;
 621                         m->m_pkthdr.rcvif = (struct ifnet *)0;
 622                         /*
 623                          * For stream protocols, prepend a Sun RPC
 624                          * Record Mark.
 625                          */
 626                         if (sotype == SOCK_STREAM) {
 627                                 M_PREPEND(m, NFSX_UNSIGNED, M_WAIT);
 628                                 if (m == NULL)
 629                                         return (ENOBUFS);
 630                                 *mtod(m, u_int32_t *) = htonl(0x80000000 | siz);
 631                         }
 632                         if (slp->ns_so->so_proto->pr_flags & PR_CONNREQUIRED)
 633                                 (void) nfs_slplock(slp, 1);
 634                         if (slp->ns_flag & SLP_VALID)
 635                             error = nfs_send(slp->ns_so, nd->nd_nam2, m, NULL);
 636                         else {
 637                             error = EPIPE;
 638                             m_freem(m);
 639                         }
 640                         if (nfsrtton)
 641                                 nfsd_rt(sotype, nd, cacherep);
 642                         if (nd->nd_nam2)
 643                                 FREE(nd->nd_nam2, M_SONAME);
 644                         if (nd->nd_mrep)
 645                                 m_freem(nd->nd_mrep);
 646                         if (error == EPIPE)
 647                                 nfsrv_zapsock(slp);
 648                         if (slp->ns_so->so_proto->pr_flags & PR_CONNREQUIRED)
 649                                 nfs_slpunlock(slp);
 650                         if (error == EINTR || error == ERESTART) {
 651                                 free((caddr_t)nd, M_NFSRVDESC);
 652                                 nfsrv_slpderef(slp);
 653                                 s = splnet();
 654                                 goto done;
 655                         }
 656                         break;
 657                     case RC_DROPIT:
 658                         if (nfsrtton)
 659                                 nfsd_rt(sotype, nd, cacherep);
 660                         m_freem(nd->nd_mrep);
 661                         if (nd->nd_nam2)
 662                                 FREE(nd->nd_nam2, M_SONAME);
 663                         break;
 664                     };
 665                     if (nd) {
 666                         FREE((caddr_t)nd, M_NFSRVDESC);
 667                         nd = NULL;
 668                     }
 669
 670                     /*
 671                      * Check to see if there are outstanding writes that
 672                      * need to be serviced.
 673                      */
 674                     cur_usec = nfs_curusec();
 675                     s = splsoftclock();
 676                     if (slp->ns_tq.lh_first &&
 677                         slp->ns_tq.lh_first->nd_time <= cur_usec) {
 678                         cacherep = RC_DOIT;
 679                         writes_todo = 1;
 680                     } else
 681                         writes_todo = 0;
 682                     splx(s);
 683                 } while (writes_todo);
 684                 s = splnet();
 685                 if (nfsrv_dorec(slp, nfsd, &nd)) {
 686                         nfsd->nfsd_flag &= ~NFSD_REQINPROG;
 687                         nfsd->nfsd_slp = NULL;
 688                         nfsrv_slpderef(slp);
 689                 }
 690         }
 691 done:
 692         TAILQ_REMOVE(&nfsd_head, nfsd, nfsd_chain);
 693         splx(s);
 694         free((caddr_t)nfsd, M_NFSD);
 695         nsd->nsd_nfsd = (struct nfsd *)0;
 696         if (--nfs_numnfsd == 0)
 697                 nfsrv_init(TRUE);       /* Reinitialize everything */
 698         return (error);
 699 }
 700
 701 /*
 702  * Shut down a socket associated with an nfssvc_sock structure.
 703  * Should be called with the send lock set, if required.
 704  * The trick here is to increment the sref at the start, so that the nfsds
 705  * will stop using it and clear ns_flag at the end so that it will not be
 706  * reassigned during cleanup.
 707  */
 708 static void
 709 nfsrv_zapsock(slp)
 710         struct nfssvc_sock *slp;
 711 {
 712         struct nfsuid *nuidp, *nnuidp;
 713         struct nfsrv_descript *nwp, *nnwp;
 714         struct socket *so;
 715         struct file *fp;
 716         struct nfsrv_rec *rec;
 717         int s;
 718
 719         slp->ns_flag &= ~SLP_ALLFLAGS;
 720         fp = slp->ns_fp;
 721         if (fp) {
 722                 slp->ns_fp = (struct file *)0;
 723                 so = slp->ns_so;
 724                 so->so_rcv.sb_flags &= ~SB_UPCALL;
 725                 so->so_upcall = NULL;
 726                 so->so_upcallarg = NULL;
 727                 soshutdown(so, 2);
 728                 closef(fp, NULL);
 729                 if (slp->ns_nam)
 730                         FREE(slp->ns_nam, M_SONAME);
 731                 m_freem(slp->ns_raw);
 732                 while ((rec = STAILQ_FIRST(&slp->ns_rec)) != NULL) {
 733                         STAILQ_REMOVE_HEAD(&slp->ns_rec, nr_link);
 734                         if (rec->nr_address)
 735                                 FREE(rec->nr_address, M_SONAME);
 736                         m_freem(rec->nr_packet);
 737                         free(rec, M_NFSRVDESC);
 738                 }
 739                 for (nuidp = slp->ns_uidlruhead.tqh_first; nuidp != 0;
 740                     nuidp = nnuidp) {
 741                         nnuidp = nuidp->nu_lru.tqe_next;
 742                         LIST_REMOVE(nuidp, nu_hash);
 743                         TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, nu_lru);
 744                         if (nuidp->nu_flag & NU_NAM)
 745                                 FREE(nuidp->nu_nam, M_SONAME);
 746                         free((caddr_t)nuidp, M_NFSUID);
 747                 }
 748                 s = splsoftclock();
 749                 for (nwp = slp->ns_tq.lh_first; nwp; nwp = nnwp) {
 750                         nnwp = nwp->nd_tq.le_next;
 751                         LIST_REMOVE(nwp, nd_tq);
 752                         free((caddr_t)nwp, M_NFSRVDESC);
 753                 }
 754                 LIST_INIT(&slp->ns_tq);
 755                 splx(s);
 756         }
 757 }
 758
 759 /*
 760  * Derefence a server socket structure. If it has no more references and
 761  * is no longer valid, you can throw it away.
 762  */
 763 void
 764 nfsrv_slpderef(slp)
 765         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                 free((caddr_t)slp, M_NFSSVC);
 770         }
 771 }
 772
 773 /*
 774  * Lock a socket against others.
 775  */
 776 int
 777 nfs_slplock(slp, wait)
 778         struct nfssvc_sock *slp;
 779         int wait;
 780 {
 781         int *statep = &slp->ns_solock;
 782
 783         if (!wait && (*statep & NFSSTA_SNDLOCK))
 784                 return(0);      /* already locked, fail */
 785         while (*statep & NFSSTA_SNDLOCK) {
 786                 *statep |= NFSSTA_WANTSND;
 787                 (void) tsleep((caddr_t)statep, 0, "nfsslplck", 0);
 788         }
 789         *statep |= NFSSTA_SNDLOCK;
 790         return (1);
 791 }
 792
 793 /*
 794  * Unlock the stream socket for others.
 795  */
 796 void
 797 nfs_slpunlock(slp)
 798         struct nfssvc_sock *slp;
 799 {
 800         int *statep = &slp->ns_solock;
 801
 802         if ((*statep & NFSSTA_SNDLOCK) == 0)
 803                 panic("nfs slpunlock");
 804         *statep &= ~NFSSTA_SNDLOCK;
 805         if (*statep & NFSSTA_WANTSND) {
 806                 *statep &= ~NFSSTA_WANTSND;
 807                 wakeup((caddr_t)statep);
 808         }
 809 }
 810
 811 /*
 812  * Initialize the data structures for the server.
 813  * Handshake with any new nfsds starting up to avoid any chance of
 814  * corruption.
 815  */
 816 void
 817 nfsrv_init(terminating)
 818         int terminating;
 819 {
 820         struct nfssvc_sock *slp, *nslp;
 821
 822         if (nfssvc_sockhead_flag & SLP_INIT)
 823                 panic("nfsd init");
 824         nfssvc_sockhead_flag |= SLP_INIT;
 825         if (terminating) {
 826                 for (slp = nfssvc_sockhead.tqh_first; slp != 0; slp = nslp) {
 827                         nslp = slp->ns_chain.tqe_next;
 828                         if (slp->ns_flag & SLP_VALID)
 829                                 nfsrv_zapsock(slp);
 830                         TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain);
 831                         free((caddr_t)slp, M_NFSSVC);
 832                 }
 833                 nfsrv_cleancache();     /* And clear out server cache */
 834         } else
 835                 nfs_pub.np_valid = 0;
 836
 837         TAILQ_INIT(&nfssvc_sockhead);
 838         nfssvc_sockhead_flag &= ~SLP_INIT;
 839         if (nfssvc_sockhead_flag & SLP_WANTINIT) {
 840                 nfssvc_sockhead_flag &= ~SLP_WANTINIT;
 841                 wakeup((caddr_t)&nfssvc_sockhead);
 842         }
 843
 844         TAILQ_INIT(&nfsd_head);
 845         nfsd_head_flag &= ~NFSD_CHECKSLP;
 846
 847 #if 0
 848         nfs_udpsock = (struct nfssvc_sock *)
 849             malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK);
 850         bzero((caddr_t)nfs_udpsock, sizeof (struct nfssvc_sock));
 851         STAILQ_INIT(&nfs_udpsock->ns_rec);
 852         TAILQ_INIT(&nfs_udpsock->ns_uidlruhead);
 853         TAILQ_INSERT_HEAD(&nfssvc_sockhead, nfs_udpsock, ns_chain);
 854
 855         nfs_cltpsock = (struct nfssvc_sock *)
 856             malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK);
 857         bzero((caddr_t)nfs_cltpsock, sizeof (struct nfssvc_sock));
 858         STAILQ_INIT(&nfs_cltpsock->ns_rec);
 859         TAILQ_INIT(&nfs_cltpsock->ns_uidlruhead);
 860         TAILQ_INSERT_TAIL(&nfssvc_sockhead, nfs_cltpsock, ns_chain);
 861 #endif
 862 }
 863
 864 /*
 865  * Add entries to the server monitor log.
 866  */
 867 static void
 868 nfsd_rt(sotype, nd, cacherep)
 869         int sotype;
 870         struct nfsrv_descript *nd;
 871         int cacherep;
 872 {
 873         struct drt *rt;
 874
 875         rt = &nfsdrt.drt[nfsdrt.pos];
 876         if (cacherep == RC_DOIT)
 877                 rt->flag = 0;
 878         else if (cacherep == RC_REPLY)
 879                 rt->flag = DRT_CACHEREPLY;
 880         else
 881                 rt->flag = DRT_CACHEDROP;
 882         if (sotype == SOCK_STREAM)
 883                 rt->flag |= DRT_TCP;
 884         if (nd->nd_flag & ND_NQNFS)
 885                 rt->flag |= DRT_NQNFS;
 886         else if (nd->nd_flag & ND_NFSV3)
 887                 rt->flag |= DRT_NFSV3;
 888         rt->proc = nd->nd_procnum;
 889         if (nd->nd_nam->sa_family == AF_INET)
 890             rt->ipadr = ((struct sockaddr_in *)nd->nd_nam)->sin_addr.s_addr;
 891         else
 892             rt->ipadr = INADDR_ANY;
 893         rt->resptime = nfs_curusec() - (nd->nd_starttime.tv_sec * 1000000 + nd->nd_starttime.tv_usec);
 894         getmicrotime(&rt->tstamp);
 895         nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ;
 896 }
 897 #endif /* NFS_NOSERVER */
 898
 899 static int nfs_defect = 0;
 900 SYSCTL_INT(_vfs_nfs, OID_AUTO, defect, CTLFLAG_RW, &nfs_defect, 0, "");
 901
 902 /*
 903  * Asynchronous I/O daemons for client nfs.
 904  * They do read-ahead and write-behind operations on the block I/O cache.
 905  * Never returns unless it fails or gets killed.
 906  */
 907 static int
 908 nfssvc_iod(struct thread *td)
 909 {
 910         struct buf *bp;
 911         int i, myiod;
 912         struct nfsmount *nmp;
 913         int error = 0;
 914
 915         /*
 916          * Assign my position or return error if too many already running
 917          */
 918         myiod = -1;
 919         for (i = 0; i < NFS_MAXASYNCDAEMON; i++)
 920                 if (nfs_asyncdaemon[i] == 0) {
 921                         nfs_asyncdaemon[i]++;
 922                         myiod = i;
 923                         break;
 924                 }
 925         if (myiod == -1)
 926                 return (EBUSY);
 927         nfs_numasync++;
 928         /*
 929          * Just loop around doin our stuff until SIGKILL
 930          */
 931         for (;;) {
 932             while (((nmp = nfs_iodmount[myiod]) == NULL
 933                     || nmp->nm_bufq.tqh_first == NULL)
 934                    && error == 0) {
 935                 if (nmp)
 936                     nmp->nm_bufqiods--;
 937                 nfs_iodwant[myiod] = td;
 938                 nfs_iodmount[myiod] = NULL;
 939                 error = tsleep((caddr_t)&nfs_iodwant[myiod],
 940                         PCATCH, "nfsidl", 0);
 941             }
 942             if (error) {
 943                 nfs_asyncdaemon[myiod] = 0;
 944                 if (nmp)
 945                     nmp->nm_bufqiods--;
 946                 nfs_iodwant[myiod] = NULL;
 947                 nfs_iodmount[myiod] = NULL;
 948                 nfs_numasync--;
 949                 return (error);
 950             }
 951             while ((bp = nmp->nm_bufq.tqh_first) != NULL) {
 952                 /* Take one off the front of the list */
 953                 TAILQ_REMOVE(&nmp->nm_bufq, bp, b_freelist);
 954                 nmp->nm_bufqlen--;
 955                 if (nmp->nm_bufqwant && nmp->nm_bufqlen <= nfs_numasync) {
 956                     nmp->nm_bufqwant = FALSE;
 957                     wakeup(&nmp->nm_bufq);
 958                 }
 959                 (void) nfs_doio(bp, NULL);
 960                 /*
 961                  * If there are more than one iod on this mount, then defect
 962                  * so that the iods can be shared out fairly between the mounts
 963                  */
 964                 if (nfs_defect && nmp->nm_bufqiods > 1) {
 965                     NFS_DPF(ASYNCIO,
 966                             ("nfssvc_iod: iod %d defecting from mount %p\n",
 967                              myiod, nmp));
 968                     nfs_iodmount[myiod] = NULL;
 969                     nmp->nm_bufqiods--;
 970                     break;
 971                 }
 972             }
 973         }
 974 }
 975
 976
 977 /*
 978  * Get an authorization string for the uid by having the mount_nfs sitting
 979  * on this mount point porpous out of the kernel and do it.
 980  */
 981 int
 982 nfs_getauth(nmp, rep, cred, auth_str, auth_len, verf_str, verf_len, key)
 983         struct nfsmount *nmp;
 984         struct nfsreq *rep;
 985         struct ucred *cred;
 986         char **auth_str;
 987         int *auth_len;
 988         char *verf_str;
 989         int *verf_len;
 990         NFSKERBKEY_T key;               /* return session key */
 991 {
 992         int error = 0;
 993
 994         while ((nmp->nm_state & NFSSTA_WAITAUTH) == 0) {
 995                 nmp->nm_state |= NFSSTA_WANTAUTH;
 996                 (void) tsleep((caddr_t)&nmp->nm_authtype, 0,
 997                         "nfsauth1", 2 * hz);
 998                 error = nfs_sigintr(nmp, rep, rep->r_td);
 999                 if (error) {
1000                         nmp->nm_state &= ~NFSSTA_WANTAUTH;
1001                         return (error);
1002                 }
1003         }
1004         nmp->nm_state &= ~(NFSSTA_WAITAUTH | NFSSTA_WANTAUTH);
1005         nmp->nm_authstr = *auth_str = (char *)malloc(RPCAUTH_MAXSIZ, M_TEMP, M_WAITOK);
1006         nmp->nm_authlen = RPCAUTH_MAXSIZ;
1007         nmp->nm_verfstr = verf_str;
1008         nmp->nm_verflen = *verf_len;
1009         nmp->nm_authuid = cred->cr_uid;
1010         wakeup((caddr_t)&nmp->nm_authstr);
1011
1012         /*
1013          * And wait for mount_nfs to do its stuff.
1014          */
1015         while ((nmp->nm_state & NFSSTA_HASAUTH) == 0 && error == 0) {
1016                 (void) tsleep((caddr_t)&nmp->nm_authlen, 0,
1017                         "nfsauth2", 2 * hz);
1018                 error = nfs_sigintr(nmp, rep, rep->r_td);
1019         }
1020         if (nmp->nm_state & NFSSTA_AUTHERR) {
1021                 nmp->nm_state &= ~NFSSTA_AUTHERR;
1022                 error = EAUTH;
1023         }
1024         if (error)
1025                 free((caddr_t)*auth_str, M_TEMP);
1026         else {
1027                 *auth_len = nmp->nm_authlen;
1028                 *verf_len = nmp->nm_verflen;
1029                 bcopy((caddr_t)nmp->nm_key, (caddr_t)key, sizeof (key));
1030         }
1031         nmp->nm_state &= ~NFSSTA_HASAUTH;
1032         nmp->nm_state |= NFSSTA_WAITAUTH;
1033         if (nmp->nm_state & NFSSTA_WANTAUTH) {
1034                 nmp->nm_state &= ~NFSSTA_WANTAUTH;
1035                 wakeup((caddr_t)&nmp->nm_authtype);
1036         }
1037         return (error);
1038 }
1039
1040 /*
1041  * Get a nickname authenticator and verifier.
1042  */
1043 int
1044 nfs_getnickauth(nmp, cred, auth_str, auth_len, verf_str, verf_len)
1045         struct nfsmount *nmp;
1046         struct ucred *cred;
1047         char **auth_str;
1048         int *auth_len;
1049         char *verf_str;
1050         int verf_len;
1051 {
1052         struct nfsuid *nuidp;
1053         u_int32_t *nickp, *verfp;
1054         struct timeval ktvin, ktvout;
1055
1056 #ifdef DIAGNOSTIC
1057         if (verf_len < (4 * NFSX_UNSIGNED))
1058                 panic("nfs_getnickauth verf too small");
1059 #endif
1060         for (nuidp = NMUIDHASH(nmp, cred->cr_uid)->lh_first;
1061             nuidp != 0; nuidp = nuidp->nu_hash.le_next) {
1062                 if (nuidp->nu_cr.cr_uid == cred->cr_uid)
1063                         break;
1064         }
1065         if (!nuidp || nuidp->nu_expire < time_second)
1066                 return (EACCES);
1067
1068         /*
1069          * Move to the end of the lru list (end of lru == most recently used).
1070          */
1071         TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru);
1072         TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, nu_lru);
1073
1074         nickp = (u_int32_t *)malloc(2 * NFSX_UNSIGNED, M_TEMP, M_WAITOK);
1075         *nickp++ = txdr_unsigned(RPCAKN_NICKNAME);
1076         *nickp = txdr_unsigned(nuidp->nu_nickname);
1077         *auth_str = (char *)nickp;
1078         *auth_len = 2 * NFSX_UNSIGNED;
1079
1080         /*
1081          * Now we must encrypt the verifier and package it up.
1082          */
1083         verfp = (u_int32_t *)verf_str;
1084         *verfp++ = txdr_unsigned(RPCAKN_NICKNAME);
1085         if (time_second > nuidp->nu_timestamp.tv_sec ||
1086             (time_second == nuidp->nu_timestamp.tv_sec &&
1087              time_second > nuidp->nu_timestamp.tv_usec))
1088                 getmicrotime(&nuidp->nu_timestamp);
1089         else
1090                 nuidp->nu_timestamp.tv_usec++;
1091         ktvin.tv_sec = txdr_unsigned(nuidp->nu_timestamp.tv_sec);
1092         ktvin.tv_usec = txdr_unsigned(nuidp->nu_timestamp.tv_usec);
1093
1094         /*
1095          * Now encrypt the timestamp verifier in ecb mode using the session
1096          * key.
1097          */
1098 #ifdef NFSKERB
1099         XXX
1100 #endif
1101
1102         *verfp++ = ktvout.tv_sec;
1103         *verfp++ = ktvout.tv_usec;
1104         *verfp = 0;
1105         return (0);
1106 }
1107
1108 /*
1109  * Save the current nickname in a hash list entry on the mount point.
1110  */
1111 int
1112 nfs_savenickauth(nmp, cred, len, key, mdp, dposp, mrep)
1113         struct nfsmount *nmp;
1114         struct ucred *cred;
1115         int len;
1116         NFSKERBKEY_T key;
1117         struct mbuf **mdp;
1118         char **dposp;
1119         struct mbuf *mrep;
1120 {
1121         struct nfsuid *nuidp;
1122         u_int32_t *tl;
1123         int32_t t1;
1124         struct mbuf *md = *mdp;
1125         struct timeval ktvin, ktvout;
1126         u_int32_t nick;
1127         char *dpos = *dposp, *cp2;
1128         int deltasec, error = 0;
1129
1130         if (len == (3 * NFSX_UNSIGNED)) {
1131                 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
1132                 ktvin.tv_sec = *tl++;
1133                 ktvin.tv_usec = *tl++;
1134                 nick = fxdr_unsigned(u_int32_t, *tl);
1135
1136                 /*
1137                  * Decrypt the timestamp in ecb mode.
1138                  */
1139 #ifdef NFSKERB
1140                 XXX
1141 #endif
1142                 ktvout.tv_sec = fxdr_unsigned(long, ktvout.tv_sec);
1143                 ktvout.tv_usec = fxdr_unsigned(long, ktvout.tv_usec);
1144                 deltasec = time_second - ktvout.tv_sec;
1145                 if (deltasec < 0)
1146                         deltasec = -deltasec;
1147                 /*
1148                  * If ok, add it to the hash list for the mount point.
1149                  */
1150                 if (deltasec <= NFS_KERBCLOCKSKEW) {
1151                         if (nmp->nm_numuids < nuidhash_max) {
1152                                 nmp->nm_numuids++;
1153                                 nuidp = (struct nfsuid *)
1154                                    malloc(sizeof (struct nfsuid), M_NFSUID,
1155                                         M_WAITOK);
1156                         } else {
1157                                 nuidp = nmp->nm_uidlruhead.tqh_first;
1158                                 LIST_REMOVE(nuidp, nu_hash);
1159                                 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp,
1160                                         nu_lru);
1161                         }
1162                         nuidp->nu_flag = 0;
1163                         nuidp->nu_cr.cr_uid = cred->cr_uid;
1164                         nuidp->nu_expire = time_second + NFS_KERBTTL;
1165                         nuidp->nu_timestamp = ktvout;
1166                         nuidp->nu_nickname = nick;
1167                         bcopy(key, nuidp->nu_key, sizeof (key));
1168                         TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp,
1169                                 nu_lru);
1170                         LIST_INSERT_HEAD(NMUIDHASH(nmp, cred->cr_uid),
1171                                 nuidp, nu_hash);
1172                 }
1173         } else
1174                 nfsm_adv(nfsm_rndup(len));
1175 nfsmout:
1176         *mdp = md;
1177         *dposp = dpos;
1178         return (error);
1179 }