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 1.18 2004/08/02 13:22:34 joerg 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 static int      nfs_soreserve = 65535;
 120 SYSCTL_INT(_vfs_nfs, OID_AUTO, soreserve, CTLFLAG_RW, &nfs_soreserve, 0, "");
 121
 122 /*
 123  * NFS server system calls
 124  */
 125
 126 #endif /* NFS_NOSERVER */
 127 /*
 128  * nfssvc_args(int flag, caddr_t argp)
 129  *
 130  * Nfs server psuedo system call for the nfsd's
 131  * Based on the flag value it either:
 132  * - adds a socket to the selection list
 133  * - remains in the kernel as an nfsd
 134  * - remains in the kernel as an nfsiod
 135  */
 136 int
 137 nfssvc(struct nfssvc_args *uap)
 138 {
 139 #ifndef NFS_NOSERVER
 140         struct nameidata nd;
 141         struct file *fp;
 142         struct sockaddr *nam;
 143         struct nfsd_args nfsdarg;
 144         struct nfsd_srvargs nfsd_srvargs, *nsd = &nfsd_srvargs;
 145         struct nfsd_cargs ncd;
 146         struct nfsd *nfsd;
 147         struct nfssvc_sock *slp;
 148         struct nfsuid *nuidp;
 149         struct nfsmount *nmp;
 150 #endif /* NFS_NOSERVER */
 151         int error;
 152         struct thread *td = curthread;
 153
 154         /*
 155          * Must be super user
 156          */
 157         error = suser(td);
 158         if(error)
 159                 return (error);
 160         KKASSERT(td->td_proc);  /* for ucred and p_fd */
 161         while (nfssvc_sockhead_flag & SLP_INIT) {
 162                  nfssvc_sockhead_flag |= SLP_WANTINIT;
 163                 (void) tsleep((caddr_t)&nfssvc_sockhead, 0, "nfsd init", 0);
 164         }
 165         if (uap->flag & NFSSVC_BIOD)
 166                 error = nfssvc_iod(td);
 167 #ifdef NFS_NOSERVER
 168         else
 169                 error = ENXIO;
 170 #else /* !NFS_NOSERVER */
 171         else if (uap->flag & NFSSVC_MNTD) {
 172                 error = copyin(uap->argp, (caddr_t)&ncd, sizeof (ncd));
 173                 if (error)
 174                         return (error);
 175                 NDINIT(&nd, NAMEI_LOOKUP, CNP_FOLLOW | CNP_LOCKLEAF,
 176                         UIO_USERSPACE, ncd.ncd_dirp, td);
 177                 error = namei(&nd);
 178                 if (error)
 179                         return (error);
 180                 NDFREE(&nd, NDF_ONLY_PNBUF);
 181                 if ((nd.ni_vp->v_flag & VROOT) == 0)
 182                         error = EINVAL;
 183                 nmp = VFSTONFS(nd.ni_vp->v_mount);
 184                 vput(nd.ni_vp);
 185                 if (error)
 186                         return (error);
 187                 if ((nmp->nm_state & NFSSTA_MNTD) &&
 188                         (uap->flag & NFSSVC_GOTAUTH) == 0)
 189                         return (0);
 190                 nmp->nm_state |= NFSSTA_MNTD;
 191                 error = nqnfs_clientd(nmp, td->td_proc->p_ucred, &ncd, uap->flag,
 192                         uap->argp, td);
 193         } else if (uap->flag & NFSSVC_ADDSOCK) {
 194                 error = copyin(uap->argp, (caddr_t)&nfsdarg, sizeof(nfsdarg));
 195                 if (error)
 196                         return (error);
 197                 error = holdsock(td->td_proc->p_fd, nfsdarg.sock, &fp);
 198                 if (error)
 199                         return (error);
 200                 /*
 201                  * Get the client address for connected sockets.
 202                  */
 203                 if (nfsdarg.name == NULL || nfsdarg.namelen == 0)
 204                         nam = (struct sockaddr *)0;
 205                 else {
 206                         error = getsockaddr(&nam, nfsdarg.name,
 207                                             nfsdarg.namelen);
 208                         if (error) {
 209                                 fdrop(fp, td);
 210                                 return (error);
 211                         }
 212                 }
 213                 error = nfssvc_addsock(fp, nam, td);
 214                 fdrop(fp, td);
 215         } else {
 216                 error = copyin(uap->argp, (caddr_t)nsd, sizeof (*nsd));
 217                 if (error)
 218                         return (error);
 219                 if ((uap->flag & NFSSVC_AUTHIN) &&
 220                     ((nfsd = nsd->nsd_nfsd)) != NULL &&
 221                     (nfsd->nfsd_slp->ns_flag & SLP_VALID)) {
 222                         slp = nfsd->nfsd_slp;
 223
 224                         /*
 225                          * First check to see if another nfsd has already
 226                          * added this credential.
 227                          */
 228                         for (nuidp = NUIDHASH(slp,nsd->nsd_cr.cr_uid)->lh_first;
 229                             nuidp != 0; nuidp = nuidp->nu_hash.le_next) {
 230                                 if (nuidp->nu_cr.cr_uid == nsd->nsd_cr.cr_uid &&
 231                                     (!nfsd->nfsd_nd->nd_nam2 ||
 232                                      netaddr_match(NU_NETFAM(nuidp),
 233                                      &nuidp->nu_haddr, nfsd->nfsd_nd->nd_nam2)))
 234                                         break;
 235                         }
 236                         if (nuidp) {
 237                             nfsrv_setcred(&nuidp->nu_cr,&nfsd->nfsd_nd->nd_cr);
 238                             nfsd->nfsd_nd->nd_flag |= ND_KERBFULL;
 239                         } else {
 240                             /*
 241                              * Nope, so we will.
 242                              */
 243                             if (slp->ns_numuids < nuidhash_max) {
 244                                 slp->ns_numuids++;
 245                                 nuidp = (struct nfsuid *)
 246                                    malloc(sizeof (struct nfsuid), M_NFSUID,
 247                                         M_WAITOK);
 248                             } else
 249                                 nuidp = (struct nfsuid *)0;
 250                             if ((slp->ns_flag & SLP_VALID) == 0) {
 251                                 if (nuidp)
 252                                     free((caddr_t)nuidp, M_NFSUID);
 253                             } else {
 254                                 if (nuidp == (struct nfsuid *)0) {
 255                                     nuidp = TAILQ_FIRST(&slp->ns_uidlruhead);
 256                                     LIST_REMOVE(nuidp, nu_hash);
 257                                     TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp,
 258                                         nu_lru);
 259                                     if (nuidp->nu_flag & NU_NAM)
 260                                         FREE(nuidp->nu_nam, M_SONAME);
 261                                 }
 262                                 nuidp->nu_flag = 0;
 263                                 nuidp->nu_cr = nsd->nsd_cr;
 264                                 if (nuidp->nu_cr.cr_ngroups > NGROUPS)
 265                                     nuidp->nu_cr.cr_ngroups = NGROUPS;
 266                                 nuidp->nu_cr.cr_ref = 1;
 267                                 nuidp->nu_timestamp = nsd->nsd_timestamp;
 268                                 nuidp->nu_expire = time_second + nsd->nsd_ttl;
 269                                 /*
 270                                  * and save the session key in nu_key.
 271                                  */
 272                                 bcopy(nsd->nsd_key, nuidp->nu_key,
 273                                     sizeof (nsd->nsd_key));
 274                                 if (nfsd->nfsd_nd->nd_nam2) {
 275                                     struct sockaddr_in *saddr;
 276
 277                                     saddr = (struct sockaddr_in *)
 278                                             nfsd->nfsd_nd->nd_nam2;
 279                                     switch (saddr->sin_family) {
 280                                     case AF_INET:
 281                                         nuidp->nu_flag |= NU_INETADDR;
 282                                         nuidp->nu_inetaddr =
 283                                              saddr->sin_addr.s_addr;
 284                                         break;
 285                                     case AF_ISO:
 286                                     default:
 287                                         nuidp->nu_flag |= NU_NAM;
 288                                         nuidp->nu_nam =
 289                                           dup_sockaddr(nfsd->nfsd_nd->nd_nam2);
 290                                         break;
 291                                     };
 292                                 }
 293                                 TAILQ_INSERT_TAIL(&slp->ns_uidlruhead, nuidp,
 294                                         nu_lru);
 295                                 LIST_INSERT_HEAD(NUIDHASH(slp, nsd->nsd_uid),
 296                                         nuidp, nu_hash);
 297                                 nfsrv_setcred(&nuidp->nu_cr,
 298                                     &nfsd->nfsd_nd->nd_cr);
 299                                 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL;
 300                             }
 301                         }
 302                 }
 303                 if ((uap->flag & NFSSVC_AUTHINFAIL) && (nfsd = nsd->nsd_nfsd))
 304                         nfsd->nfsd_flag |= NFSD_AUTHFAIL;
 305                 error = nfssvc_nfsd(nsd, uap->argp, td);
 306         }
 307 #endif /* NFS_NOSERVER */
 308         if (error == EINTR || error == ERESTART)
 309                 error = 0;
 310         return (error);
 311 }
 312
 313 #ifndef NFS_NOSERVER
 314 /*
 315  * Adds a socket to the list for servicing by nfsds.
 316  */
 317 static int
 318 nfssvc_addsock(struct file *fp, struct sockaddr *mynam, struct thread *td)
 319 {
 320         int siz;
 321         struct nfssvc_sock *slp;
 322         struct socket *so;
 323         int error, s;
 324
 325         so = (struct socket *)fp->f_data;
 326 #if 0
 327         tslp = (struct nfssvc_sock *)0;
 328         /*
 329          * Add it to the list, as required.
 330          */
 331         if (so->so_proto->pr_protocol == IPPROTO_UDP) {
 332                 tslp = nfs_udpsock;
 333                 if (tslp->ns_flag & SLP_VALID) {
 334                         if (mynam != NULL)
 335                                 FREE(mynam, M_SONAME);
 336                         return (EPERM);
 337                 }
 338         }
 339 #endif
 340         /*
 341          * Reserve buffer space in the socket.  Note that due to bugs in
 342          * Linux's delayed-ack code, serious performance degredation may
 343          * occur with linux hosts if the minimum is used.
 344          */
 345         if (so->so_type == SOCK_STREAM)
 346                 siz = NFS_MAXPACKET + sizeof (u_long);
 347         else
 348                 siz = NFS_MAXPACKET;
 349         if (siz < nfs_soreserve)
 350             siz = nfs_soreserve;
 351         if (siz > sb_max_adj) {
 352             printf("Warning: vfs.nfs.soreserve (%d) "
 353                 "limited to adjusted sb_max (%ld)\n",
 354                 nfs_soreserve, sb_max_adj);
 355             siz = sb_max_adj;
 356         }
 357
 358         error = soreserve(so, siz, siz, &td->td_proc->p_rlimit[RLIMIT_SBSIZE]);
 359         if (error) {
 360                 if (mynam != NULL)
 361                         FREE(mynam, M_SONAME);
 362                 return (error);
 363         }
 364
 365         /*
 366          * Set protocol specific options { for now TCP only } and
 367          * reserve some space. For datagram sockets, this can get called
 368          * repeatedly for the same socket, but that isn't harmful.
 369          */
 370         if (so->so_type == SOCK_STREAM) {
 371                 struct sockopt sopt;
 372                 int val;
 373
 374                 bzero(&sopt, sizeof sopt);
 375                 sopt.sopt_level = SOL_SOCKET;
 376                 sopt.sopt_name = SO_KEEPALIVE;
 377                 sopt.sopt_val = &val;
 378                 sopt.sopt_valsize = sizeof val;
 379                 val = 1;
 380                 sosetopt(so, &sopt);
 381         }
 382         if (so->so_proto->pr_domain->dom_family == AF_INET &&
 383             so->so_proto->pr_protocol == IPPROTO_TCP) {
 384                 struct sockopt sopt;
 385                 int val;
 386
 387                 bzero(&sopt, sizeof sopt);
 388                 sopt.sopt_level = IPPROTO_TCP;
 389                 sopt.sopt_name = TCP_NODELAY;
 390                 sopt.sopt_val = &val;
 391                 sopt.sopt_valsize = sizeof val;
 392                 val = 1;
 393                 sosetopt(so, &sopt);
 394         }
 395         so->so_rcv.sb_flags &= ~SB_NOINTR;
 396         so->so_rcv.sb_timeo = 0;
 397         so->so_snd.sb_flags &= ~SB_NOINTR;
 398         so->so_snd.sb_timeo = 0;
 399
 400         slp = (struct nfssvc_sock *)
 401                 malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK);
 402         bzero((caddr_t)slp, sizeof (struct nfssvc_sock));
 403         STAILQ_INIT(&slp->ns_rec);
 404         TAILQ_INIT(&slp->ns_uidlruhead);
 405         TAILQ_INSERT_TAIL(&nfssvc_sockhead, slp, ns_chain);
 406
 407         slp->ns_so = so;
 408         slp->ns_nam = mynam;
 409         fp->f_count++;
 410         slp->ns_fp = fp;
 411         s = splnet();
 412         so->so_upcallarg = (caddr_t)slp;
 413         so->so_upcall = nfsrv_rcv;
 414         so->so_rcv.sb_flags |= SB_UPCALL;
 415         slp->ns_flag = (SLP_VALID | SLP_NEEDQ);
 416         nfsrv_wakenfsd(slp);
 417         splx(s);
 418         return (0);
 419 }
 420
 421 /*
 422  * Called by nfssvc() for nfsds. Just loops around servicing rpc requests
 423  * until it is killed by a signal.
 424  */
 425 static int
 426 nfssvc_nfsd(struct nfsd_srvargs *nsd, caddr_t argp, struct thread *td)
 427 {
 428         int siz;
 429         struct nfssvc_sock *slp;
 430         struct nfsd *nfsd = nsd->nsd_nfsd;
 431         struct nfsrv_descript *nd = NULL;
 432         struct mbuf *m, *mreq;
 433         int error = 0, cacherep, s, sotype, writes_todo;
 434         int procrastinate;
 435         u_quad_t cur_usec;
 436
 437 #ifndef nolint
 438         cacherep = RC_DOIT;
 439         writes_todo = 0;
 440 #endif
 441         if (nfsd == (struct nfsd *)0) {
 442                 nsd->nsd_nfsd = nfsd = (struct nfsd *)
 443                         malloc(sizeof (struct nfsd), M_NFSD, M_WAITOK);
 444                 bzero((caddr_t)nfsd, sizeof (struct nfsd));
 445                 s = splnet();
 446                 nfsd->nfsd_td = td;
 447                 TAILQ_INSERT_TAIL(&nfsd_head, nfsd, nfsd_chain);
 448                 nfs_numnfsd++;
 449         } else
 450                 s = splnet();
 451
 452         /*
 453          * Loop getting rpc requests until SIGKILL.
 454          */
 455         for (;;) {
 456                 if ((nfsd->nfsd_flag & NFSD_REQINPROG) == 0) {
 457                         while (nfsd->nfsd_slp == (struct nfssvc_sock *)0 &&
 458                             (nfsd_head_flag & NFSD_CHECKSLP) == 0) {
 459                                 nfsd->nfsd_flag |= NFSD_WAITING;
 460                                 nfsd_waiting++;
 461                                 error = tsleep((caddr_t)nfsd, PCATCH, "nfsd", 0);
 462                                 nfsd_waiting--;
 463                                 if (error)
 464                                         goto done;
 465                         }
 466                         if (nfsd->nfsd_slp == (struct nfssvc_sock *)0 &&
 467                             (nfsd_head_flag & NFSD_CHECKSLP) != 0) {
 468                                 TAILQ_FOREACH(slp, &nfssvc_sockhead, ns_chain) {
 469                                     if ((slp->ns_flag & (SLP_VALID | SLP_DOREC))
 470                                         == (SLP_VALID | SLP_DOREC)) {
 471                                             slp->ns_flag &= ~SLP_DOREC;
 472                                             slp->ns_sref++;
 473                                             nfsd->nfsd_slp = slp;
 474                                             break;
 475                                     }
 476                                 }
 477                                 if (slp == 0)
 478                                         nfsd_head_flag &= ~NFSD_CHECKSLP;
 479                         }
 480                         if ((slp = nfsd->nfsd_slp) == (struct nfssvc_sock *)0)
 481                                 continue;
 482                         if (slp->ns_flag & SLP_VALID) {
 483                                 if (slp->ns_flag & SLP_DISCONN)
 484                                         nfsrv_zapsock(slp);
 485                                 else if (slp->ns_flag & SLP_NEEDQ) {
 486                                         slp->ns_flag &= ~SLP_NEEDQ;
 487                                         (void) nfs_slplock(slp, 1);
 488                                         nfsrv_rcv(slp->ns_so, (caddr_t)slp,
 489                                                 MB_WAIT);
 490                                         nfs_slpunlock(slp);
 491                                 }
 492                                 error = nfsrv_dorec(slp, nfsd, &nd);
 493                                 cur_usec = nfs_curusec();
 494                                 if (error && slp->ns_tq.lh_first &&
 495                                     slp->ns_tq.lh_first->nd_time <= cur_usec) {
 496                                         error = 0;
 497                                         cacherep = RC_DOIT;
 498                                         writes_todo = 1;
 499                                 } else
 500                                         writes_todo = 0;
 501                                 nfsd->nfsd_flag |= NFSD_REQINPROG;
 502                         }
 503                 } else {
 504                         error = 0;
 505                         slp = nfsd->nfsd_slp;
 506                 }
 507                 if (error || (slp->ns_flag & SLP_VALID) == 0) {
 508                         if (nd) {
 509                                 free((caddr_t)nd, M_NFSRVDESC);
 510                                 nd = NULL;
 511                         }
 512                         nfsd->nfsd_slp = (struct nfssvc_sock *)0;
 513                         nfsd->nfsd_flag &= ~NFSD_REQINPROG;
 514                         nfsrv_slpderef(slp);
 515                         continue;
 516                 }
 517                 splx(s);
 518                 sotype = slp->ns_so->so_type;
 519                 if (nd) {
 520                     getmicrotime(&nd->nd_starttime);
 521                     if (nd->nd_nam2)
 522                         nd->nd_nam = nd->nd_nam2;
 523                     else
 524                         nd->nd_nam = slp->ns_nam;
 525
 526                     /*
 527                      * Check to see if authorization is needed.
 528                      */
 529                     if (nfsd->nfsd_flag & NFSD_NEEDAUTH) {
 530                         nfsd->nfsd_flag &= ~NFSD_NEEDAUTH;
 531                         nsd->nsd_haddr =
 532                                 ((struct sockaddr_in *)
 533                                  nd->nd_nam)->sin_addr.s_addr;
 534                         nsd->nsd_authlen = nfsd->nfsd_authlen;
 535                         nsd->nsd_verflen = nfsd->nfsd_verflen;
 536                         if (!copyout(nfsd->nfsd_authstr,nsd->nsd_authstr,
 537                                 nfsd->nfsd_authlen) &&
 538                             !copyout(nfsd->nfsd_verfstr, nsd->nsd_verfstr,
 539                                 nfsd->nfsd_verflen) &&
 540                             !copyout((caddr_t)nsd, argp, sizeof (*nsd)))
 541                             return (ENEEDAUTH);
 542                         cacherep = RC_DROPIT;
 543                     } else
 544                         cacherep = nfsrv_getcache(nd, slp, &mreq);
 545
 546                     /*
 547                      * Check for just starting up for NQNFS and send
 548                      * fake "try again later" replies to the NQNFS clients.
 549                      */
 550                     if (notstarted && nqnfsstarttime <= time_second) {
 551                         if (modify_flag) {
 552                                 nqnfsstarttime = time_second + nqsrv_writeslack;
 553                                 modify_flag = 0;
 554                         } else
 555                                 notstarted = 0;
 556                     }
 557                     if (notstarted) {
 558                         if ((nd->nd_flag & ND_NQNFS) == 0)
 559                                 cacherep = RC_DROPIT;
 560                         else if (nd->nd_procnum != NFSPROC_WRITE) {
 561                                 nd->nd_procnum = NFSPROC_NOOP;
 562                                 nd->nd_repstat = NQNFS_TRYLATER;
 563                                 cacherep = RC_DOIT;
 564                         } else
 565                                 modify_flag = 1;
 566                     } else if (nfsd->nfsd_flag & NFSD_AUTHFAIL) {
 567                         nfsd->nfsd_flag &= ~NFSD_AUTHFAIL;
 568                         nd->nd_procnum = NFSPROC_NOOP;
 569                         nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
 570                         cacherep = RC_DOIT;
 571                     } else if (nfs_privport) {
 572                         /* Check if source port is privileged */
 573                         u_short port;
 574                         struct sockaddr *nam = nd->nd_nam;
 575                         struct sockaddr_in *sin;
 576
 577                         sin = (struct sockaddr_in *)nam;
 578                         port = ntohs(sin->sin_port);
 579                         if (port >= IPPORT_RESERVED &&
 580                             nd->nd_procnum != NFSPROC_NULL) {
 581                             nd->nd_procnum = NFSPROC_NOOP;
 582                             nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
 583                             cacherep = RC_DOIT;
 584                             printf("NFS request from unprivileged port (%s:%d)\n",
 585                                    inet_ntoa(sin->sin_addr), port);
 586                         }
 587                     }
 588
 589                 }
 590
 591                 /*
 592                  * Loop to get all the write rpc relies that have been
 593                  * gathered together.
 594                  */
 595                 do {
 596                     switch (cacherep) {
 597                     case RC_DOIT:
 598                         if (nd && (nd->nd_flag & ND_NFSV3))
 599                             procrastinate = nfsrvw_procrastinate_v3;
 600                         else
 601                             procrastinate = nfsrvw_procrastinate;
 602                         if (writes_todo || (nd->nd_procnum == NFSPROC_WRITE &&
 603                             procrastinate > 0 && !notstarted))
 604                             error = nfsrv_writegather(&nd, slp,
 605                                 nfsd->nfsd_td, &mreq);
 606                         else
 607                             error = (*(nfsrv3_procs[nd->nd_procnum]))(nd,
 608                                 slp, nfsd->nfsd_td, &mreq);
 609                         if (mreq == NULL)
 610                                 break;
 611                         if (error != 0 && error != NFSERR_RETVOID) {
 612                                 if (nd->nd_procnum != NQNFSPROC_VACATED)
 613                                         nfsstats.srv_errs++;
 614                                 nfsrv_updatecache(nd, FALSE, mreq);
 615                                 if (nd->nd_nam2)
 616                                         FREE(nd->nd_nam2, M_SONAME);
 617                                 break;
 618                         }
 619                         nfsstats.srvrpccnt[nd->nd_procnum]++;
 620                         nfsrv_updatecache(nd, TRUE, mreq);
 621                         nd->nd_mrep = (struct mbuf *)0;
 622                     case RC_REPLY:
 623                         m = mreq;
 624                         siz = 0;
 625                         while (m) {
 626                                 siz += m->m_len;
 627                                 m = m->m_next;
 628                         }
 629                         if (siz <= 0 || siz > NFS_MAXPACKET) {
 630                                 printf("mbuf siz=%d\n",siz);
 631                                 panic("Bad nfs svc reply");
 632                         }
 633                         m = mreq;
 634                         m->m_pkthdr.len = siz;
 635                         m->m_pkthdr.rcvif = (struct ifnet *)0;
 636                         /*
 637                          * For stream protocols, prepend a Sun RPC
 638                          * Record Mark.
 639                          */
 640                         if (sotype == SOCK_STREAM) {
 641                                 M_PREPEND(m, NFSX_UNSIGNED, MB_WAIT);
 642                                 if (m == NULL)
 643                                         return (ENOBUFS);
 644                                 *mtod(m, u_int32_t *) = htonl(0x80000000 | siz);
 645                         }
 646                         if (slp->ns_so->so_proto->pr_flags & PR_CONNREQUIRED)
 647                                 (void) nfs_slplock(slp, 1);
 648                         if (slp->ns_flag & SLP_VALID)
 649                             error = nfs_send(slp->ns_so, nd->nd_nam2, m, NULL);
 650                         else {
 651                             error = EPIPE;
 652                             m_freem(m);
 653                         }
 654                         if (nfsrtton)
 655                                 nfsd_rt(sotype, nd, cacherep);
 656                         if (nd->nd_nam2)
 657                                 FREE(nd->nd_nam2, M_SONAME);
 658                         if (nd->nd_mrep)
 659                                 m_freem(nd->nd_mrep);
 660                         if (error == EPIPE)
 661                                 nfsrv_zapsock(slp);
 662                         if (slp->ns_so->so_proto->pr_flags & PR_CONNREQUIRED)
 663                                 nfs_slpunlock(slp);
 664                         if (error == EINTR || error == ERESTART) {
 665                                 free((caddr_t)nd, M_NFSRVDESC);
 666                                 nfsrv_slpderef(slp);
 667                                 s = splnet();
 668                                 goto done;
 669                         }
 670                         break;
 671                     case RC_DROPIT:
 672                         if (nfsrtton)
 673                                 nfsd_rt(sotype, nd, cacherep);
 674                         m_freem(nd->nd_mrep);
 675                         if (nd->nd_nam2)
 676                                 FREE(nd->nd_nam2, M_SONAME);
 677                         break;
 678                     };
 679                     if (nd) {
 680                         FREE((caddr_t)nd, M_NFSRVDESC);
 681                         nd = NULL;
 682                     }
 683
 684                     /*
 685                      * Check to see if there are outstanding writes that
 686                      * need to be serviced.
 687                      */
 688                     cur_usec = nfs_curusec();
 689                     s = splsoftclock();
 690                     if (slp->ns_tq.lh_first &&
 691                         slp->ns_tq.lh_first->nd_time <= cur_usec) {
 692                         cacherep = RC_DOIT;
 693                         writes_todo = 1;
 694                     } else
 695                         writes_todo = 0;
 696                     splx(s);
 697                 } while (writes_todo);
 698                 s = splnet();
 699                 if (nfsrv_dorec(slp, nfsd, &nd)) {
 700                         nfsd->nfsd_flag &= ~NFSD_REQINPROG;
 701                         nfsd->nfsd_slp = NULL;
 702                         nfsrv_slpderef(slp);
 703                 }
 704         }
 705 done:
 706         TAILQ_REMOVE(&nfsd_head, nfsd, nfsd_chain);
 707         splx(s);
 708         free((caddr_t)nfsd, M_NFSD);
 709         nsd->nsd_nfsd = (struct nfsd *)0;
 710         if (--nfs_numnfsd == 0)
 711                 nfsrv_init(TRUE);       /* Reinitialize everything */
 712         return (error);
 713 }
 714
 715 /*
 716  * Shut down a socket associated with an nfssvc_sock structure.
 717  * Should be called with the send lock set, if required.
 718  * The trick here is to increment the sref at the start, so that the nfsds
 719  * will stop using it and clear ns_flag at the end so that it will not be
 720  * reassigned during cleanup.
 721  */
 722 static void
 723 nfsrv_zapsock(struct nfssvc_sock *slp)
 724 {
 725         struct nfsuid *nuidp, *nnuidp;
 726         struct nfsrv_descript *nwp, *nnwp;
 727         struct socket *so;
 728         struct file *fp;
 729         struct nfsrv_rec *rec;
 730         int s;
 731
 732         slp->ns_flag &= ~SLP_ALLFLAGS;
 733         fp = slp->ns_fp;
 734         if (fp) {
 735                 slp->ns_fp = (struct file *)0;
 736                 so = slp->ns_so;
 737                 so->so_rcv.sb_flags &= ~SB_UPCALL;
 738                 so->so_upcall = NULL;
 739                 so->so_upcallarg = NULL;
 740                 soshutdown(so, 2);
 741                 closef(fp, NULL);
 742                 if (slp->ns_nam)
 743                         FREE(slp->ns_nam, M_SONAME);
 744                 m_freem(slp->ns_raw);
 745                 while ((rec = STAILQ_FIRST(&slp->ns_rec)) != NULL) {
 746                         STAILQ_REMOVE_HEAD(&slp->ns_rec, nr_link);
 747                         if (rec->nr_address)
 748                                 FREE(rec->nr_address, M_SONAME);
 749                         m_freem(rec->nr_packet);
 750                         free(rec, M_NFSRVDESC);
 751                 }
 752                 TAILQ_FOREACH_MUTABLE(nuidp, &slp->ns_uidlruhead, nu_lru,
 753                                       nnuidp) {
 754                         LIST_REMOVE(nuidp, nu_hash);
 755                         TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, nu_lru);
 756                         if (nuidp->nu_flag & NU_NAM)
 757                                 FREE(nuidp->nu_nam, M_SONAME);
 758                         free((caddr_t)nuidp, M_NFSUID);
 759                 }
 760                 s = splsoftclock();
 761                 for (nwp = slp->ns_tq.lh_first; nwp; nwp = nnwp) {
 762                         nnwp = nwp->nd_tq.le_next;
 763                         LIST_REMOVE(nwp, nd_tq);
 764                         free((caddr_t)nwp, M_NFSRVDESC);
 765                 }
 766                 LIST_INIT(&slp->ns_tq);
 767                 splx(s);
 768         }
 769 }
 770
 771 /*
 772  * Derefence a server socket structure. If it has no more references and
 773  * is no longer valid, you can throw it away.
 774  */
 775 void
 776 nfsrv_slpderef(struct nfssvc_sock *slp)
 777 {
 778         if (--(slp->ns_sref) == 0 && (slp->ns_flag & SLP_VALID) == 0) {
 779                 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain);
 780                 free((caddr_t)slp, M_NFSSVC);
 781         }
 782 }
 783
 784 /*
 785  * Lock a socket against others.
 786  */
 787 int
 788 nfs_slplock(struct nfssvc_sock *slp, int wait)
 789 {
 790         int *statep = &slp->ns_solock;
 791
 792         if (!wait && (*statep & NFSSTA_SNDLOCK))
 793                 return(0);      /* already locked, fail */
 794         while (*statep & NFSSTA_SNDLOCK) {
 795                 *statep |= NFSSTA_WANTSND;
 796                 (void) tsleep((caddr_t)statep, 0, "nfsslplck", 0);
 797         }
 798         *statep |= NFSSTA_SNDLOCK;
 799         return (1);
 800 }
 801
 802 /*
 803  * Unlock the stream socket for others.
 804  */
 805 void
 806 nfs_slpunlock(struct nfssvc_sock *slp)
 807 {
 808         int *statep = &slp->ns_solock;
 809
 810         if ((*statep & NFSSTA_SNDLOCK) == 0)
 811                 panic("nfs slpunlock");
 812         *statep &= ~NFSSTA_SNDLOCK;
 813         if (*statep & NFSSTA_WANTSND) {
 814                 *statep &= ~NFSSTA_WANTSND;
 815                 wakeup((caddr_t)statep);
 816         }
 817 }
 818
 819 /*
 820  * Initialize the data structures for the server.
 821  * Handshake with any new nfsds starting up to avoid any chance of
 822  * corruption.
 823  */
 824 void
 825 nfsrv_init(int terminating)
 826 {
 827         struct nfssvc_sock *slp, *nslp;
 828
 829         if (nfssvc_sockhead_flag & SLP_INIT)
 830                 panic("nfsd init");
 831         nfssvc_sockhead_flag |= SLP_INIT;
 832         if (terminating) {
 833                 TAILQ_FOREACH_MUTABLE(slp, &nfssvc_sockhead, ns_chain, nslp) {
 834                         if (slp->ns_flag & SLP_VALID)
 835                                 nfsrv_zapsock(slp);
 836                         TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain);
 837                         free((caddr_t)slp, M_NFSSVC);
 838                 }
 839                 nfsrv_cleancache();     /* And clear out server cache */
 840         } else
 841                 nfs_pub.np_valid = 0;
 842
 843         TAILQ_INIT(&nfssvc_sockhead);
 844         nfssvc_sockhead_flag &= ~SLP_INIT;
 845         if (nfssvc_sockhead_flag & SLP_WANTINIT) {
 846                 nfssvc_sockhead_flag &= ~SLP_WANTINIT;
 847                 wakeup((caddr_t)&nfssvc_sockhead);
 848         }
 849
 850         TAILQ_INIT(&nfsd_head);
 851         nfsd_head_flag &= ~NFSD_CHECKSLP;
 852
 853 #if 0
 854         nfs_udpsock = (struct nfssvc_sock *)
 855             malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK);
 856         bzero((caddr_t)nfs_udpsock, sizeof (struct nfssvc_sock));
 857         STAILQ_INIT(&nfs_udpsock->ns_rec);
 858         TAILQ_INIT(&nfs_udpsock->ns_uidlruhead);
 859         TAILQ_INSERT_HEAD(&nfssvc_sockhead, nfs_udpsock, ns_chain);
 860
 861         nfs_cltpsock = (struct nfssvc_sock *)
 862             malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK);
 863         bzero((caddr_t)nfs_cltpsock, sizeof (struct nfssvc_sock));
 864         STAILQ_INIT(&nfs_cltpsock->ns_rec);
 865         TAILQ_INIT(&nfs_cltpsock->ns_uidlruhead);
 866         TAILQ_INSERT_TAIL(&nfssvc_sockhead, nfs_cltpsock, ns_chain);
 867 #endif
 868 }
 869
 870 /*
 871  * Add entries to the server monitor log.
 872  */
 873 static void
 874 nfsd_rt(int sotype, struct nfsrv_descript *nd, int cacherep)
 875 {
 876         struct drt *rt;
 877
 878         rt = &nfsdrt.drt[nfsdrt.pos];
 879         if (cacherep == RC_DOIT)
 880                 rt->flag = 0;
 881         else if (cacherep == RC_REPLY)
 882                 rt->flag = DRT_CACHEREPLY;
 883         else
 884                 rt->flag = DRT_CACHEDROP;
 885         if (sotype == SOCK_STREAM)
 886                 rt->flag |= DRT_TCP;
 887         if (nd->nd_flag & ND_NQNFS)
 888                 rt->flag |= DRT_NQNFS;
 889         else if (nd->nd_flag & ND_NFSV3)
 890                 rt->flag |= DRT_NFSV3;
 891         rt->proc = nd->nd_procnum;
 892         if (nd->nd_nam->sa_family == AF_INET)
 893             rt->ipadr = ((struct sockaddr_in *)nd->nd_nam)->sin_addr.s_addr;
 894         else
 895             rt->ipadr = INADDR_ANY;
 896         rt->resptime = nfs_curusec() - (nd->nd_starttime.tv_sec * 1000000 + nd->nd_starttime.tv_usec);
 897         getmicrotime(&rt->tstamp);
 898         nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ;
 899 }
 900 #endif /* NFS_NOSERVER */
 901
 902 static int nfs_defect = 0;
 903 SYSCTL_INT(_vfs_nfs, OID_AUTO, defect, CTLFLAG_RW, &nfs_defect, 0, "");
 904
 905 /*
 906  * Asynchronous I/O daemons for client nfs.
 907  * They do read-ahead and write-behind operations on the block I/O cache.
 908  * Never returns unless it fails or gets killed.
 909  */
 910 static int
 911 nfssvc_iod(struct thread *td)
 912 {
 913         struct buf *bp;
 914         int i, myiod;
 915         struct nfsmount *nmp;
 916         int error = 0;
 917
 918         /*
 919          * Assign my position or return error if too many already running
 920          */
 921         myiod = -1;
 922         for (i = 0; i < NFS_MAXASYNCDAEMON; i++)
 923                 if (nfs_asyncdaemon[i] == 0) {
 924                         nfs_asyncdaemon[i]++;
 925                         myiod = i;
 926                         break;
 927                 }
 928         if (myiod == -1)
 929                 return (EBUSY);
 930         nfs_numasync++;
 931         /*
 932          * Just loop around doin our stuff until SIGKILL
 933          */
 934         for (;;) {
 935             while (((nmp = nfs_iodmount[myiod]) == NULL
 936                      || TAILQ_EMPTY(&nmp->nm_bufq))
 937                    && error == 0) {
 938                 if (nmp)
 939                     nmp->nm_bufqiods--;
 940                 nfs_iodwant[myiod] = td;
 941                 nfs_iodmount[myiod] = NULL;
 942                 error = tsleep((caddr_t)&nfs_iodwant[myiod],
 943                         PCATCH, "nfsidl", 0);
 944             }
 945             if (error) {
 946                 nfs_asyncdaemon[myiod] = 0;
 947                 if (nmp)
 948                     nmp->nm_bufqiods--;
 949                 nfs_iodwant[myiod] = NULL;
 950                 nfs_iodmount[myiod] = NULL;
 951                 nfs_numasync--;
 952                 return (error);
 953             }
 954             while ((bp = TAILQ_FIRST(&nmp->nm_bufq)) != NULL) {
 955                 /* Take one off the front of the list */
 956                 TAILQ_REMOVE(&nmp->nm_bufq, bp, b_freelist);
 957                 nmp->nm_bufqlen--;
 958                 if (nmp->nm_bufqwant && nmp->nm_bufqlen <= nfs_numasync) {
 959                     nmp->nm_bufqwant = FALSE;
 960                     wakeup(&nmp->nm_bufq);
 961                 }
 962                 (void) nfs_doio(bp, NULL);
 963                 /*
 964                  * If there are more than one iod on this mount, then defect
 965                  * so that the iods can be shared out fairly between the mounts
 966                  */
 967                 if (nfs_defect && nmp->nm_bufqiods > 1) {
 968                     NFS_DPF(ASYNCIO,
 969                             ("nfssvc_iod: iod %d defecting from mount %p\n",
 970                              myiod, nmp));
 971                     nfs_iodmount[myiod] = NULL;
 972                     nmp->nm_bufqiods--;
 973                     break;
 974                 }
 975             }
 976         }
 977 }
 978
 979
 980 /*
 981  * Get an authorization string for the uid by having the mount_nfs sitting
 982  * on this mount point porpous out of the kernel and do it.
 983  */
 984 int
 985 nfs_getauth(struct nfsmount *nmp, struct nfsreq *rep,
 986             struct ucred *cred, char **auth_str, int *auth_len, char *verf_str,
 987             int *verf_len, NFSKERBKEY_T key /* return session key */)
 988 {
 989         int error = 0;
 990
 991         while ((nmp->nm_state & NFSSTA_WAITAUTH) == 0) {
 992                 nmp->nm_state |= NFSSTA_WANTAUTH;
 993                 (void) tsleep((caddr_t)&nmp->nm_authtype, 0,
 994                         "nfsauth1", 2 * hz);
 995                 error = nfs_sigintr(nmp, rep, rep->r_td);
 996                 if (error) {
 997                         nmp->nm_state &= ~NFSSTA_WANTAUTH;
 998                         return (error);
 999                 }
1000         }
1001         nmp->nm_state &= ~(NFSSTA_WAITAUTH | NFSSTA_WANTAUTH);
1002         nmp->nm_authstr = *auth_str = (char *)malloc(RPCAUTH_MAXSIZ, M_TEMP, M_WAITOK);
1003         nmp->nm_authlen = RPCAUTH_MAXSIZ;
1004         nmp->nm_verfstr = verf_str;
1005         nmp->nm_verflen = *verf_len;
1006         nmp->nm_authuid = cred->cr_uid;
1007         wakeup((caddr_t)&nmp->nm_authstr);
1008
1009         /*
1010          * And wait for mount_nfs to do its stuff.
1011          */
1012         while ((nmp->nm_state & NFSSTA_HASAUTH) == 0 && error == 0) {
1013                 (void) tsleep((caddr_t)&nmp->nm_authlen, 0,
1014                         "nfsauth2", 2 * hz);
1015                 error = nfs_sigintr(nmp, rep, rep->r_td);
1016         }
1017         if (nmp->nm_state & NFSSTA_AUTHERR) {
1018                 nmp->nm_state &= ~NFSSTA_AUTHERR;
1019                 error = EAUTH;
1020         }
1021         if (error)
1022                 free((caddr_t)*auth_str, M_TEMP);
1023         else {
1024                 *auth_len = nmp->nm_authlen;
1025                 *verf_len = nmp->nm_verflen;
1026                 bcopy((caddr_t)nmp->nm_key, (caddr_t)key, sizeof (key));
1027         }
1028         nmp->nm_state &= ~NFSSTA_HASAUTH;
1029         nmp->nm_state |= NFSSTA_WAITAUTH;
1030         if (nmp->nm_state & NFSSTA_WANTAUTH) {
1031                 nmp->nm_state &= ~NFSSTA_WANTAUTH;
1032                 wakeup((caddr_t)&nmp->nm_authtype);
1033         }
1034         return (error);
1035 }
1036
1037 /*
1038  * Get a nickname authenticator and verifier.
1039  */
1040 int
1041 nfs_getnickauth(struct nfsmount *nmp, struct ucred *cred, char **auth_str,
1042                 int *auth_len, char *verf_str, int verf_len)
1043 {
1044         struct nfsuid *nuidp;
1045         u_int32_t *nickp, *verfp;
1046         struct timeval ktvin, ktvout;
1047
1048 #ifdef DIAGNOSTIC
1049         if (verf_len < (4 * NFSX_UNSIGNED))
1050                 panic("nfs_getnickauth verf too small");
1051 #endif
1052         for (nuidp = NMUIDHASH(nmp, cred->cr_uid)->lh_first;
1053             nuidp != 0; nuidp = nuidp->nu_hash.le_next) {
1054                 if (nuidp->nu_cr.cr_uid == cred->cr_uid)
1055                         break;
1056         }
1057         if (!nuidp || nuidp->nu_expire < time_second)
1058                 return (EACCES);
1059
1060         /*
1061          * Move to the end of the lru list (end of lru == most recently used).
1062          */
1063         TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru);
1064         TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, nu_lru);
1065
1066         nickp = (u_int32_t *)malloc(2 * NFSX_UNSIGNED, M_TEMP, M_WAITOK);
1067         *nickp++ = txdr_unsigned(RPCAKN_NICKNAME);
1068         *nickp = txdr_unsigned(nuidp->nu_nickname);
1069         *auth_str = (char *)nickp;
1070         *auth_len = 2 * NFSX_UNSIGNED;
1071
1072         /*
1073          * Now we must encrypt the verifier and package it up.
1074          */
1075         verfp = (u_int32_t *)verf_str;
1076         *verfp++ = txdr_unsigned(RPCAKN_NICKNAME);
1077         if (time_second > nuidp->nu_timestamp.tv_sec ||
1078             (time_second == nuidp->nu_timestamp.tv_sec &&
1079              time_second > nuidp->nu_timestamp.tv_usec))
1080                 getmicrotime(&nuidp->nu_timestamp);
1081         else
1082                 nuidp->nu_timestamp.tv_usec++;
1083         ktvin.tv_sec = txdr_unsigned(nuidp->nu_timestamp.tv_sec);
1084         ktvin.tv_usec = txdr_unsigned(nuidp->nu_timestamp.tv_usec);
1085
1086         /*
1087          * Now encrypt the timestamp verifier in ecb mode using the session
1088          * key.
1089          */
1090 #ifdef NFSKERB
1091         XXX
1092 #endif
1093
1094         *verfp++ = ktvout.tv_sec;
1095         *verfp++ = ktvout.tv_usec;
1096         *verfp = 0;
1097         return (0);
1098 }
1099
1100 /*
1101  * Save the current nickname in a hash list entry on the mount point.
1102  */
1103 int
1104 nfs_savenickauth(struct nfsmount *nmp, struct ucred *cred, int len,
1105                  NFSKERBKEY_T key, struct mbuf **mdp, char **dposp,
1106                  struct mbuf *mrep)
1107 {
1108         struct nfsuid *nuidp;
1109         u_int32_t *tl;
1110         int32_t t1;
1111         struct mbuf *md = *mdp;
1112         struct timeval ktvin, ktvout;
1113         u_int32_t nick;
1114         char *dpos = *dposp, *cp2;
1115         int deltasec, error = 0;
1116
1117         if (len == (3 * NFSX_UNSIGNED)) {
1118                 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
1119                 ktvin.tv_sec = *tl++;
1120                 ktvin.tv_usec = *tl++;
1121                 nick = fxdr_unsigned(u_int32_t, *tl);
1122
1123                 /*
1124                  * Decrypt the timestamp in ecb mode.
1125                  */
1126 #ifdef NFSKERB
1127                 XXX
1128 #endif
1129                 ktvout.tv_sec = fxdr_unsigned(long, ktvout.tv_sec);
1130                 ktvout.tv_usec = fxdr_unsigned(long, ktvout.tv_usec);
1131                 deltasec = time_second - ktvout.tv_sec;
1132                 if (deltasec < 0)
1133                         deltasec = -deltasec;
1134                 /*
1135                  * If ok, add it to the hash list for the mount point.
1136                  */
1137                 if (deltasec <= NFS_KERBCLOCKSKEW) {
1138                         if (nmp->nm_numuids < nuidhash_max) {
1139                                 nmp->nm_numuids++;
1140                                 nuidp = (struct nfsuid *)
1141                                    malloc(sizeof (struct nfsuid), M_NFSUID,
1142                                         M_WAITOK);
1143                         } else {
1144                                 nuidp = TAILQ_FIRST(&nmp->nm_uidlruhead);
1145                                 LIST_REMOVE(nuidp, nu_hash);
1146                                 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp,
1147                                         nu_lru);
1148                         }
1149                         nuidp->nu_flag = 0;
1150                         nuidp->nu_cr.cr_uid = cred->cr_uid;
1151                         nuidp->nu_expire = time_second + NFS_KERBTTL;
1152                         nuidp->nu_timestamp = ktvout;
1153                         nuidp->nu_nickname = nick;
1154                         bcopy(key, nuidp->nu_key, sizeof (key));
1155                         TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp,
1156                                 nu_lru);
1157                         LIST_INSERT_HEAD(NMUIDHASH(nmp, cred->cr_uid),
1158                                 nuidp, nu_hash);
1159                 }
1160         } else
1161                 nfsm_adv(nfsm_rndup(len));
1162 nfsmout:
1163         *mdp = md;
1164         *dposp = dpos;
1165         return (error);
1166 }