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 1.19 2004/11/12 00:09:37 dillon 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/nlookup.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 nlookupdata 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         struct vnode *vp;
 151 #endif /* NFS_NOSERVER */
 152         int error;
 153         struct thread *td = curthread;
 154
 155         /*
 156          * Must be super user
 157          */
 158         error = suser(td);
 159         if(error)
 160                 return (error);
 161         KKASSERT(td->td_proc);  /* for ucred and p_fd */
 162         while (nfssvc_sockhead_flag & SLP_INIT) {
 163                  nfssvc_sockhead_flag |= SLP_WANTINIT;
 164                 (void) tsleep((caddr_t)&nfssvc_sockhead, 0, "nfsd init", 0);
 165         }
 166         if (uap->flag & NFSSVC_BIOD)
 167                 error = nfssvc_iod(td);
 168 #ifdef NFS_NOSERVER
 169         else
 170                 error = ENXIO;
 171 #else /* !NFS_NOSERVER */
 172         else if (uap->flag & NFSSVC_MNTD) {
 173                 error = copyin(uap->argp, (caddr_t)&ncd, sizeof (ncd));
 174                 if (error)
 175                         return (error);
 176                 vp = NULL;
 177                 error = nlookup_init(&nd, ncd.ncd_dirp, UIO_USERSPACE,
 178                                         NLC_FOLLOW);
 179                 if (error == 0)
 180                         error = nlookup(&nd);
 181                 if (error == 0)
 182                         error = cache_vget(nd.nl_ncp, nd.nl_cred, LK_EXCLUSIVE, &vp);
 183                 nlookup_done(&nd);
 184                 if (error)
 185                         return (error);
 186
 187                 if ((vp->v_flag & VROOT) == 0)
 188                         error = EINVAL;
 189                 nmp = VFSTONFS(vp->v_mount);
 190                 vput(vp);
 191                 if (error)
 192                         return (error);
 193                 if ((nmp->nm_state & NFSSTA_MNTD) &&
 194                         (uap->flag & NFSSVC_GOTAUTH) == 0)
 195                         return (0);
 196                 nmp->nm_state |= NFSSTA_MNTD;
 197                 error = nqnfs_clientd(nmp, td->td_proc->p_ucred, &ncd, uap->flag,
 198                         uap->argp, td);
 199         } else if (uap->flag & NFSSVC_ADDSOCK) {
 200                 error = copyin(uap->argp, (caddr_t)&nfsdarg, sizeof(nfsdarg));
 201                 if (error)
 202                         return (error);
 203                 error = holdsock(td->td_proc->p_fd, nfsdarg.sock, &fp);
 204                 if (error)
 205                         return (error);
 206                 /*
 207                  * Get the client address for connected sockets.
 208                  */
 209                 if (nfsdarg.name == NULL || nfsdarg.namelen == 0)
 210                         nam = (struct sockaddr *)0;
 211                 else {
 212                         error = getsockaddr(&nam, nfsdarg.name,
 213                                             nfsdarg.namelen);
 214                         if (error) {
 215                                 fdrop(fp, td);
 216                                 return (error);
 217                         }
 218                 }
 219                 error = nfssvc_addsock(fp, nam, td);
 220                 fdrop(fp, td);
 221         } else {
 222                 error = copyin(uap->argp, (caddr_t)nsd, sizeof (*nsd));
 223                 if (error)
 224                         return (error);
 225                 if ((uap->flag & NFSSVC_AUTHIN) &&
 226                     ((nfsd = nsd->nsd_nfsd)) != NULL &&
 227                     (nfsd->nfsd_slp->ns_flag & SLP_VALID)) {
 228                         slp = nfsd->nfsd_slp;
 229
 230                         /*
 231                          * First check to see if another nfsd has already
 232                          * added this credential.
 233                          */
 234                         for (nuidp = NUIDHASH(slp,nsd->nsd_cr.cr_uid)->lh_first;
 235                             nuidp != 0; nuidp = nuidp->nu_hash.le_next) {
 236                                 if (nuidp->nu_cr.cr_uid == nsd->nsd_cr.cr_uid &&
 237                                     (!nfsd->nfsd_nd->nd_nam2 ||
 238                                      netaddr_match(NU_NETFAM(nuidp),
 239                                      &nuidp->nu_haddr, nfsd->nfsd_nd->nd_nam2)))
 240                                         break;
 241                         }
 242                         if (nuidp) {
 243                             nfsrv_setcred(&nuidp->nu_cr,&nfsd->nfsd_nd->nd_cr);
 244                             nfsd->nfsd_nd->nd_flag |= ND_KERBFULL;
 245                         } else {
 246                             /*
 247                              * Nope, so we will.
 248                              */
 249                             if (slp->ns_numuids < nuidhash_max) {
 250                                 slp->ns_numuids++;
 251                                 nuidp = (struct nfsuid *)
 252                                    malloc(sizeof (struct nfsuid), M_NFSUID,
 253                                         M_WAITOK);
 254                             } else
 255                                 nuidp = (struct nfsuid *)0;
 256                             if ((slp->ns_flag & SLP_VALID) == 0) {
 257                                 if (nuidp)
 258                                     free((caddr_t)nuidp, M_NFSUID);
 259                             } else {
 260                                 if (nuidp == (struct nfsuid *)0) {
 261                                     nuidp = TAILQ_FIRST(&slp->ns_uidlruhead);
 262                                     LIST_REMOVE(nuidp, nu_hash);
 263                                     TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp,
 264                                         nu_lru);
 265                                     if (nuidp->nu_flag & NU_NAM)
 266                                         FREE(nuidp->nu_nam, M_SONAME);
 267                                 }
 268                                 nuidp->nu_flag = 0;
 269                                 nuidp->nu_cr = nsd->nsd_cr;
 270                                 if (nuidp->nu_cr.cr_ngroups > NGROUPS)
 271                                     nuidp->nu_cr.cr_ngroups = NGROUPS;
 272                                 nuidp->nu_cr.cr_ref = 1;
 273                                 nuidp->nu_timestamp = nsd->nsd_timestamp;
 274                                 nuidp->nu_expire = time_second + nsd->nsd_ttl;
 275                                 /*
 276                                  * and save the session key in nu_key.
 277                                  */
 278                                 bcopy(nsd->nsd_key, nuidp->nu_key,
 279                                     sizeof (nsd->nsd_key));
 280                                 if (nfsd->nfsd_nd->nd_nam2) {
 281                                     struct sockaddr_in *saddr;
 282
 283                                     saddr = (struct sockaddr_in *)
 284                                             nfsd->nfsd_nd->nd_nam2;
 285                                     switch (saddr->sin_family) {
 286                                     case AF_INET:
 287                                         nuidp->nu_flag |= NU_INETADDR;
 288                                         nuidp->nu_inetaddr =
 289                                              saddr->sin_addr.s_addr;
 290                                         break;
 291                                     case AF_ISO:
 292                                     default:
 293                                         nuidp->nu_flag |= NU_NAM;
 294                                         nuidp->nu_nam =
 295                                           dup_sockaddr(nfsd->nfsd_nd->nd_nam2);
 296                                         break;
 297                                     };
 298                                 }
 299                                 TAILQ_INSERT_TAIL(&slp->ns_uidlruhead, nuidp,
 300                                         nu_lru);
 301                                 LIST_INSERT_HEAD(NUIDHASH(slp, nsd->nsd_uid),
 302                                         nuidp, nu_hash);
 303                                 nfsrv_setcred(&nuidp->nu_cr,
 304                                     &nfsd->nfsd_nd->nd_cr);
 305                                 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL;
 306                             }
 307                         }
 308                 }
 309                 if ((uap->flag & NFSSVC_AUTHINFAIL) && (nfsd = nsd->nsd_nfsd))
 310                         nfsd->nfsd_flag |= NFSD_AUTHFAIL;
 311                 error = nfssvc_nfsd(nsd, uap->argp, td);
 312         }
 313 #endif /* NFS_NOSERVER */
 314         if (error == EINTR || error == ERESTART)
 315                 error = 0;
 316         return (error);
 317 }
 318
 319 #ifndef NFS_NOSERVER
 320 /*
 321  * Adds a socket to the list for servicing by nfsds.
 322  */
 323 static int
 324 nfssvc_addsock(struct file *fp, struct sockaddr *mynam, struct thread *td)
 325 {
 326         int siz;
 327         struct nfssvc_sock *slp;
 328         struct socket *so;
 329         int error, s;
 330
 331         so = (struct socket *)fp->f_data;
 332 #if 0
 333         tslp = (struct nfssvc_sock *)0;
 334         /*
 335          * Add it to the list, as required.
 336          */
 337         if (so->so_proto->pr_protocol == IPPROTO_UDP) {
 338                 tslp = nfs_udpsock;
 339                 if (tslp->ns_flag & SLP_VALID) {
 340                         if (mynam != NULL)
 341                                 FREE(mynam, M_SONAME);
 342                         return (EPERM);
 343                 }
 344         }
 345 #endif
 346         /*
 347          * Reserve buffer space in the socket.  Note that due to bugs in
 348          * Linux's delayed-ack code, serious performance degredation may
 349          * occur with linux hosts if the minimum is used.
 350          */
 351         if (so->so_type == SOCK_STREAM)
 352                 siz = NFS_MAXPACKET + sizeof (u_long);
 353         else
 354                 siz = NFS_MAXPACKET;
 355         if (siz < nfs_soreserve)
 356             siz = nfs_soreserve;
 357         if (siz > sb_max_adj) {
 358             printf("Warning: vfs.nfs.soreserve (%d) "
 359                 "limited to adjusted sb_max (%ld)\n",
 360                 nfs_soreserve, sb_max_adj);
 361             siz = sb_max_adj;
 362         }
 363
 364         error = soreserve(so, siz, siz, &td->td_proc->p_rlimit[RLIMIT_SBSIZE]);
 365         if (error) {
 366                 if (mynam != NULL)
 367                         FREE(mynam, M_SONAME);
 368                 return (error);
 369         }
 370
 371         /*
 372          * Set protocol specific options { for now TCP only } and
 373          * reserve some space. For datagram sockets, this can get called
 374          * repeatedly for the same socket, but that isn't harmful.
 375          */
 376         if (so->so_type == SOCK_STREAM) {
 377                 struct sockopt sopt;
 378                 int val;
 379
 380                 bzero(&sopt, sizeof sopt);
 381                 sopt.sopt_level = SOL_SOCKET;
 382                 sopt.sopt_name = SO_KEEPALIVE;
 383                 sopt.sopt_val = &val;
 384                 sopt.sopt_valsize = sizeof val;
 385                 val = 1;
 386                 sosetopt(so, &sopt);
 387         }
 388         if (so->so_proto->pr_domain->dom_family == AF_INET &&
 389             so->so_proto->pr_protocol == IPPROTO_TCP) {
 390                 struct sockopt sopt;
 391                 int val;
 392
 393                 bzero(&sopt, sizeof sopt);
 394                 sopt.sopt_level = IPPROTO_TCP;
 395                 sopt.sopt_name = TCP_NODELAY;
 396                 sopt.sopt_val = &val;
 397                 sopt.sopt_valsize = sizeof val;
 398                 val = 1;
 399                 sosetopt(so, &sopt);
 400         }
 401         so->so_rcv.sb_flags &= ~SB_NOINTR;
 402         so->so_rcv.sb_timeo = 0;
 403         so->so_snd.sb_flags &= ~SB_NOINTR;
 404         so->so_snd.sb_timeo = 0;
 405
 406         slp = (struct nfssvc_sock *)
 407                 malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK);
 408         bzero((caddr_t)slp, sizeof (struct nfssvc_sock));
 409         STAILQ_INIT(&slp->ns_rec);
 410         TAILQ_INIT(&slp->ns_uidlruhead);
 411         TAILQ_INSERT_TAIL(&nfssvc_sockhead, slp, ns_chain);
 412
 413         slp->ns_so = so;
 414         slp->ns_nam = mynam;
 415         fp->f_count++;
 416         slp->ns_fp = fp;
 417         s = splnet();
 418         so->so_upcallarg = (caddr_t)slp;
 419         so->so_upcall = nfsrv_rcv;
 420         so->so_rcv.sb_flags |= SB_UPCALL;
 421         slp->ns_flag = (SLP_VALID | SLP_NEEDQ);
 422         nfsrv_wakenfsd(slp);
 423         splx(s);
 424         return (0);
 425 }
 426
 427 /*
 428  * Called by nfssvc() for nfsds. Just loops around servicing rpc requests
 429  * until it is killed by a signal.
 430  */
 431 static int
 432 nfssvc_nfsd(struct nfsd_srvargs *nsd, caddr_t argp, struct thread *td)
 433 {
 434         int siz;
 435         struct nfssvc_sock *slp;
 436         struct nfsd *nfsd = nsd->nsd_nfsd;
 437         struct nfsrv_descript *nd = NULL;
 438         struct mbuf *m, *mreq;
 439         int error = 0, cacherep, s, sotype, writes_todo;
 440         int procrastinate;
 441         u_quad_t cur_usec;
 442
 443 #ifndef nolint
 444         cacherep = RC_DOIT;
 445         writes_todo = 0;
 446 #endif
 447         if (nfsd == (struct nfsd *)0) {
 448                 nsd->nsd_nfsd = nfsd = (struct nfsd *)
 449                         malloc(sizeof (struct nfsd), M_NFSD, M_WAITOK);
 450                 bzero((caddr_t)nfsd, sizeof (struct nfsd));
 451                 s = splnet();
 452                 nfsd->nfsd_td = td;
 453                 TAILQ_INSERT_TAIL(&nfsd_head, nfsd, nfsd_chain);
 454                 nfs_numnfsd++;
 455         } else
 456                 s = splnet();
 457
 458         /*
 459          * Loop getting rpc requests until SIGKILL.
 460          */
 461         for (;;) {
 462                 if ((nfsd->nfsd_flag & NFSD_REQINPROG) == 0) {
 463                         while (nfsd->nfsd_slp == (struct nfssvc_sock *)0 &&
 464                             (nfsd_head_flag & NFSD_CHECKSLP) == 0) {
 465                                 nfsd->nfsd_flag |= NFSD_WAITING;
 466                                 nfsd_waiting++;
 467                                 error = tsleep((caddr_t)nfsd, PCATCH, "nfsd", 0);
 468                                 nfsd_waiting--;
 469                                 if (error)
 470                                         goto done;
 471                         }
 472                         if (nfsd->nfsd_slp == (struct nfssvc_sock *)0 &&
 473                             (nfsd_head_flag & NFSD_CHECKSLP) != 0) {
 474                                 TAILQ_FOREACH(slp, &nfssvc_sockhead, ns_chain) {
 475                                     if ((slp->ns_flag & (SLP_VALID | SLP_DOREC))
 476                                         == (SLP_VALID | SLP_DOREC)) {
 477                                             slp->ns_flag &= ~SLP_DOREC;
 478                                             slp->ns_sref++;
 479                                             nfsd->nfsd_slp = slp;
 480                                             break;
 481                                     }
 482                                 }
 483                                 if (slp == 0)
 484                                         nfsd_head_flag &= ~NFSD_CHECKSLP;
 485                         }
 486                         if ((slp = nfsd->nfsd_slp) == (struct nfssvc_sock *)0)
 487                                 continue;
 488                         if (slp->ns_flag & SLP_VALID) {
 489                                 if (slp->ns_flag & SLP_DISCONN)
 490                                         nfsrv_zapsock(slp);
 491                                 else if (slp->ns_flag & SLP_NEEDQ) {
 492                                         slp->ns_flag &= ~SLP_NEEDQ;
 493                                         (void) nfs_slplock(slp, 1);
 494                                         nfsrv_rcv(slp->ns_so, (caddr_t)slp,
 495                                                 MB_WAIT);
 496                                         nfs_slpunlock(slp);
 497                                 }
 498                                 error = nfsrv_dorec(slp, nfsd, &nd);
 499                                 cur_usec = nfs_curusec();
 500                                 if (error && slp->ns_tq.lh_first &&
 501                                     slp->ns_tq.lh_first->nd_time <= cur_usec) {
 502                                         error = 0;
 503                                         cacherep = RC_DOIT;
 504                                         writes_todo = 1;
 505                                 } else
 506                                         writes_todo = 0;
 507                                 nfsd->nfsd_flag |= NFSD_REQINPROG;
 508                         }
 509                 } else {
 510                         error = 0;
 511                         slp = nfsd->nfsd_slp;
 512                 }
 513                 if (error || (slp->ns_flag & SLP_VALID) == 0) {
 514                         if (nd) {
 515                                 free((caddr_t)nd, M_NFSRVDESC);
 516                                 nd = NULL;
 517                         }
 518                         nfsd->nfsd_slp = (struct nfssvc_sock *)0;
 519                         nfsd->nfsd_flag &= ~NFSD_REQINPROG;
 520                         nfsrv_slpderef(slp);
 521                         continue;
 522                 }
 523                 splx(s);
 524                 sotype = slp->ns_so->so_type;
 525                 if (nd) {
 526                     getmicrotime(&nd->nd_starttime);
 527                     if (nd->nd_nam2)
 528                         nd->nd_nam = nd->nd_nam2;
 529                     else
 530                         nd->nd_nam = slp->ns_nam;
 531
 532                     /*
 533                      * Check to see if authorization is needed.
 534                      */
 535                     if (nfsd->nfsd_flag & NFSD_NEEDAUTH) {
 536                         nfsd->nfsd_flag &= ~NFSD_NEEDAUTH;
 537                         nsd->nsd_haddr =
 538                                 ((struct sockaddr_in *)
 539                                  nd->nd_nam)->sin_addr.s_addr;
 540                         nsd->nsd_authlen = nfsd->nfsd_authlen;
 541                         nsd->nsd_verflen = nfsd->nfsd_verflen;
 542                         if (!copyout(nfsd->nfsd_authstr,nsd->nsd_authstr,
 543                                 nfsd->nfsd_authlen) &&
 544                             !copyout(nfsd->nfsd_verfstr, nsd->nsd_verfstr,
 545                                 nfsd->nfsd_verflen) &&
 546                             !copyout((caddr_t)nsd, argp, sizeof (*nsd)))
 547                             return (ENEEDAUTH);
 548                         cacherep = RC_DROPIT;
 549                     } else
 550                         cacherep = nfsrv_getcache(nd, slp, &mreq);
 551
 552                     /*
 553                      * Check for just starting up for NQNFS and send
 554                      * fake "try again later" replies to the NQNFS clients.
 555                      */
 556                     if (notstarted && nqnfsstarttime <= time_second) {
 557                         if (modify_flag) {
 558                                 nqnfsstarttime = time_second + nqsrv_writeslack;
 559                                 modify_flag = 0;
 560                         } else
 561                                 notstarted = 0;
 562                     }
 563                     if (notstarted) {
 564                         if ((nd->nd_flag & ND_NQNFS) == 0)
 565                                 cacherep = RC_DROPIT;
 566                         else if (nd->nd_procnum != NFSPROC_WRITE) {
 567                                 nd->nd_procnum = NFSPROC_NOOP;
 568                                 nd->nd_repstat = NQNFS_TRYLATER;
 569                                 cacherep = RC_DOIT;
 570                         } else
 571                                 modify_flag = 1;
 572                     } else if (nfsd->nfsd_flag & NFSD_AUTHFAIL) {
 573                         nfsd->nfsd_flag &= ~NFSD_AUTHFAIL;
 574                         nd->nd_procnum = NFSPROC_NOOP;
 575                         nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
 576                         cacherep = RC_DOIT;
 577                     } else if (nfs_privport) {
 578                         /* Check if source port is privileged */
 579                         u_short port;
 580                         struct sockaddr *nam = nd->nd_nam;
 581                         struct sockaddr_in *sin;
 582
 583                         sin = (struct sockaddr_in *)nam;
 584                         port = ntohs(sin->sin_port);
 585                         if (port >= IPPORT_RESERVED &&
 586                             nd->nd_procnum != NFSPROC_NULL) {
 587                             nd->nd_procnum = NFSPROC_NOOP;
 588                             nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
 589                             cacherep = RC_DOIT;
 590                             printf("NFS request from unprivileged port (%s:%d)\n",
 591                                    inet_ntoa(sin->sin_addr), port);
 592                         }
 593                     }
 594
 595                 }
 596
 597                 /*
 598                  * Loop to get all the write rpc relies that have been
 599                  * gathered together.
 600                  */
 601                 do {
 602                     switch (cacherep) {
 603                     case RC_DOIT:
 604                         if (nd && (nd->nd_flag & ND_NFSV3))
 605                             procrastinate = nfsrvw_procrastinate_v3;
 606                         else
 607                             procrastinate = nfsrvw_procrastinate;
 608                         if (writes_todo || (nd->nd_procnum == NFSPROC_WRITE &&
 609                             procrastinate > 0 && !notstarted))
 610                             error = nfsrv_writegather(&nd, slp,
 611                                 nfsd->nfsd_td, &mreq);
 612                         else
 613                             error = (*(nfsrv3_procs[nd->nd_procnum]))(nd,
 614                                 slp, nfsd->nfsd_td, &mreq);
 615                         if (mreq == NULL)
 616                                 break;
 617                         if (error != 0 && error != NFSERR_RETVOID) {
 618                                 if (nd->nd_procnum != NQNFSPROC_VACATED)
 619                                         nfsstats.srv_errs++;
 620                                 nfsrv_updatecache(nd, FALSE, mreq);
 621                                 if (nd->nd_nam2)
 622                                         FREE(nd->nd_nam2, M_SONAME);
 623                                 break;
 624                         }
 625                         nfsstats.srvrpccnt[nd->nd_procnum]++;
 626                         nfsrv_updatecache(nd, TRUE, mreq);
 627                         nd->nd_mrep = (struct mbuf *)0;
 628                     case RC_REPLY:
 629                         m = mreq;
 630                         siz = 0;
 631                         while (m) {
 632                                 siz += m->m_len;
 633                                 m = m->m_next;
 634                         }
 635                         if (siz <= 0 || siz > NFS_MAXPACKET) {
 636                                 printf("mbuf siz=%d\n",siz);
 637                                 panic("Bad nfs svc reply");
 638                         }
 639                         m = mreq;
 640                         m->m_pkthdr.len = siz;
 641                         m->m_pkthdr.rcvif = (struct ifnet *)0;
 642                         /*
 643                          * For stream protocols, prepend a Sun RPC
 644                          * Record Mark.
 645                          */
 646                         if (sotype == SOCK_STREAM) {
 647                                 M_PREPEND(m, NFSX_UNSIGNED, MB_WAIT);
 648                                 if (m == NULL)
 649                                         return (ENOBUFS);
 650                                 *mtod(m, u_int32_t *) = htonl(0x80000000 | siz);
 651                         }
 652                         if (slp->ns_so->so_proto->pr_flags & PR_CONNREQUIRED)
 653                                 (void) nfs_slplock(slp, 1);
 654                         if (slp->ns_flag & SLP_VALID)
 655                             error = nfs_send(slp->ns_so, nd->nd_nam2, m, NULL);
 656                         else {
 657                             error = EPIPE;
 658                             m_freem(m);
 659                         }
 660                         if (nfsrtton)
 661                                 nfsd_rt(sotype, nd, cacherep);
 662                         if (nd->nd_nam2)
 663                                 FREE(nd->nd_nam2, M_SONAME);
 664                         if (nd->nd_mrep)
 665                                 m_freem(nd->nd_mrep);
 666                         if (error == EPIPE)
 667                                 nfsrv_zapsock(slp);
 668                         if (slp->ns_so->so_proto->pr_flags & PR_CONNREQUIRED)
 669                                 nfs_slpunlock(slp);
 670                         if (error == EINTR || error == ERESTART) {
 671                                 free((caddr_t)nd, M_NFSRVDESC);
 672                                 nfsrv_slpderef(slp);
 673                                 s = splnet();
 674                                 goto done;
 675                         }
 676                         break;
 677                     case RC_DROPIT:
 678                         if (nfsrtton)
 679                                 nfsd_rt(sotype, nd, cacherep);
 680                         m_freem(nd->nd_mrep);
 681                         if (nd->nd_nam2)
 682                                 FREE(nd->nd_nam2, M_SONAME);
 683                         break;
 684                     };
 685                     if (nd) {
 686                         FREE((caddr_t)nd, M_NFSRVDESC);
 687                         nd = NULL;
 688                     }
 689
 690                     /*
 691                      * Check to see if there are outstanding writes that
 692                      * need to be serviced.
 693                      */
 694                     cur_usec = nfs_curusec();
 695                     s = splsoftclock();
 696                     if (slp->ns_tq.lh_first &&
 697                         slp->ns_tq.lh_first->nd_time <= cur_usec) {
 698                         cacherep = RC_DOIT;
 699                         writes_todo = 1;
 700                     } else
 701                         writes_todo = 0;
 702                     splx(s);
 703                 } while (writes_todo);
 704                 s = splnet();
 705                 if (nfsrv_dorec(slp, nfsd, &nd)) {
 706                         nfsd->nfsd_flag &= ~NFSD_REQINPROG;
 707                         nfsd->nfsd_slp = NULL;
 708                         nfsrv_slpderef(slp);
 709                 }
 710         }
 711 done:
 712         TAILQ_REMOVE(&nfsd_head, nfsd, nfsd_chain);
 713         splx(s);
 714         free((caddr_t)nfsd, M_NFSD);
 715         nsd->nsd_nfsd = (struct nfsd *)0;
 716         if (--nfs_numnfsd == 0)
 717                 nfsrv_init(TRUE);       /* Reinitialize everything */
 718         return (error);
 719 }
 720
 721 /*
 722  * Shut down a socket associated with an nfssvc_sock structure.
 723  * Should be called with the send lock set, if required.
 724  * The trick here is to increment the sref at the start, so that the nfsds
 725  * will stop using it and clear ns_flag at the end so that it will not be
 726  * reassigned during cleanup.
 727  */
 728 static void
 729 nfsrv_zapsock(struct nfssvc_sock *slp)
 730 {
 731         struct nfsuid *nuidp, *nnuidp;
 732         struct nfsrv_descript *nwp, *nnwp;
 733         struct socket *so;
 734         struct file *fp;
 735         struct nfsrv_rec *rec;
 736         int s;
 737
 738         slp->ns_flag &= ~SLP_ALLFLAGS;
 739         fp = slp->ns_fp;
 740         if (fp) {
 741                 slp->ns_fp = (struct file *)0;
 742                 so = slp->ns_so;
 743                 so->so_rcv.sb_flags &= ~SB_UPCALL;
 744                 so->so_upcall = NULL;
 745                 so->so_upcallarg = NULL;
 746                 soshutdown(so, 2);
 747                 closef(fp, NULL);
 748                 if (slp->ns_nam)
 749                         FREE(slp->ns_nam, M_SONAME);
 750                 m_freem(slp->ns_raw);
 751                 while ((rec = STAILQ_FIRST(&slp->ns_rec)) != NULL) {
 752                         STAILQ_REMOVE_HEAD(&slp->ns_rec, nr_link);
 753                         if (rec->nr_address)
 754                                 FREE(rec->nr_address, M_SONAME);
 755                         m_freem(rec->nr_packet);
 756                         free(rec, M_NFSRVDESC);
 757                 }
 758                 TAILQ_FOREACH_MUTABLE(nuidp, &slp->ns_uidlruhead, nu_lru,
 759                                       nnuidp) {
 760                         LIST_REMOVE(nuidp, nu_hash);
 761                         TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, nu_lru);
 762                         if (nuidp->nu_flag & NU_NAM)
 763                                 FREE(nuidp->nu_nam, M_SONAME);
 764                         free((caddr_t)nuidp, M_NFSUID);
 765                 }
 766                 s = splsoftclock();
 767                 for (nwp = slp->ns_tq.lh_first; nwp; nwp = nnwp) {
 768                         nnwp = nwp->nd_tq.le_next;
 769                         LIST_REMOVE(nwp, nd_tq);
 770                         free((caddr_t)nwp, M_NFSRVDESC);
 771                 }
 772                 LIST_INIT(&slp->ns_tq);
 773                 splx(s);
 774         }
 775 }
 776
 777 /*
 778  * Derefence a server socket structure. If it has no more references and
 779  * is no longer valid, you can throw it away.
 780  */
 781 void
 782 nfsrv_slpderef(struct nfssvc_sock *slp)
 783 {
 784         if (--(slp->ns_sref) == 0 && (slp->ns_flag & SLP_VALID) == 0) {
 785                 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain);
 786                 free((caddr_t)slp, M_NFSSVC);
 787         }
 788 }
 789
 790 /*
 791  * Lock a socket against others.
 792  */
 793 int
 794 nfs_slplock(struct nfssvc_sock *slp, int wait)
 795 {
 796         int *statep = &slp->ns_solock;
 797
 798         if (!wait && (*statep & NFSSTA_SNDLOCK))
 799                 return(0);      /* already locked, fail */
 800         while (*statep & NFSSTA_SNDLOCK) {
 801                 *statep |= NFSSTA_WANTSND;
 802                 (void) tsleep((caddr_t)statep, 0, "nfsslplck", 0);
 803         }
 804         *statep |= NFSSTA_SNDLOCK;
 805         return (1);
 806 }
 807
 808 /*
 809  * Unlock the stream socket for others.
 810  */
 811 void
 812 nfs_slpunlock(struct nfssvc_sock *slp)
 813 {
 814         int *statep = &slp->ns_solock;
 815
 816         if ((*statep & NFSSTA_SNDLOCK) == 0)
 817                 panic("nfs slpunlock");
 818         *statep &= ~NFSSTA_SNDLOCK;
 819         if (*statep & NFSSTA_WANTSND) {
 820                 *statep &= ~NFSSTA_WANTSND;
 821                 wakeup((caddr_t)statep);
 822         }
 823 }
 824
 825 /*
 826  * Initialize the data structures for the server.
 827  * Handshake with any new nfsds starting up to avoid any chance of
 828  * corruption.
 829  */
 830 void
 831 nfsrv_init(int terminating)
 832 {
 833         struct nfssvc_sock *slp, *nslp;
 834
 835         if (nfssvc_sockhead_flag & SLP_INIT)
 836                 panic("nfsd init");
 837         nfssvc_sockhead_flag |= SLP_INIT;
 838         if (terminating) {
 839                 TAILQ_FOREACH_MUTABLE(slp, &nfssvc_sockhead, ns_chain, nslp) {
 840                         if (slp->ns_flag & SLP_VALID)
 841                                 nfsrv_zapsock(slp);
 842                         TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain);
 843                         free((caddr_t)slp, M_NFSSVC);
 844                 }
 845                 nfsrv_cleancache();     /* And clear out server cache */
 846         } else
 847                 nfs_pub.np_valid = 0;
 848
 849         TAILQ_INIT(&nfssvc_sockhead);
 850         nfssvc_sockhead_flag &= ~SLP_INIT;
 851         if (nfssvc_sockhead_flag & SLP_WANTINIT) {
 852                 nfssvc_sockhead_flag &= ~SLP_WANTINIT;
 853                 wakeup((caddr_t)&nfssvc_sockhead);
 854         }
 855
 856         TAILQ_INIT(&nfsd_head);
 857         nfsd_head_flag &= ~NFSD_CHECKSLP;
 858
 859 #if 0
 860         nfs_udpsock = (struct nfssvc_sock *)
 861             malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK);
 862         bzero((caddr_t)nfs_udpsock, sizeof (struct nfssvc_sock));
 863         STAILQ_INIT(&nfs_udpsock->ns_rec);
 864         TAILQ_INIT(&nfs_udpsock->ns_uidlruhead);
 865         TAILQ_INSERT_HEAD(&nfssvc_sockhead, nfs_udpsock, ns_chain);
 866
 867         nfs_cltpsock = (struct nfssvc_sock *)
 868             malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK);
 869         bzero((caddr_t)nfs_cltpsock, sizeof (struct nfssvc_sock));
 870         STAILQ_INIT(&nfs_cltpsock->ns_rec);
 871         TAILQ_INIT(&nfs_cltpsock->ns_uidlruhead);
 872         TAILQ_INSERT_TAIL(&nfssvc_sockhead, nfs_cltpsock, ns_chain);
 873 #endif
 874 }
 875
 876 /*
 877  * Add entries to the server monitor log.
 878  */
 879 static void
 880 nfsd_rt(int sotype, struct nfsrv_descript *nd, int cacherep)
 881 {
 882         struct drt *rt;
 883
 884         rt = &nfsdrt.drt[nfsdrt.pos];
 885         if (cacherep == RC_DOIT)
 886                 rt->flag = 0;
 887         else if (cacherep == RC_REPLY)
 888                 rt->flag = DRT_CACHEREPLY;
 889         else
 890                 rt->flag = DRT_CACHEDROP;
 891         if (sotype == SOCK_STREAM)
 892                 rt->flag |= DRT_TCP;
 893         if (nd->nd_flag & ND_NQNFS)
 894                 rt->flag |= DRT_NQNFS;
 895         else if (nd->nd_flag & ND_NFSV3)
 896                 rt->flag |= DRT_NFSV3;
 897         rt->proc = nd->nd_procnum;
 898         if (nd->nd_nam->sa_family == AF_INET)
 899             rt->ipadr = ((struct sockaddr_in *)nd->nd_nam)->sin_addr.s_addr;
 900         else
 901             rt->ipadr = INADDR_ANY;
 902         rt->resptime = nfs_curusec() - (nd->nd_starttime.tv_sec * 1000000 + nd->nd_starttime.tv_usec);
 903         getmicrotime(&rt->tstamp);
 904         nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ;
 905 }
 906 #endif /* NFS_NOSERVER */
 907
 908 static int nfs_defect = 0;
 909 SYSCTL_INT(_vfs_nfs, OID_AUTO, defect, CTLFLAG_RW, &nfs_defect, 0, "");
 910
 911 /*
 912  * Asynchronous I/O daemons for client nfs.
 913  * They do read-ahead and write-behind operations on the block I/O cache.
 914  * Never returns unless it fails or gets killed.
 915  */
 916 static int
 917 nfssvc_iod(struct thread *td)
 918 {
 919         struct buf *bp;
 920         int i, myiod;
 921         struct nfsmount *nmp;
 922         int error = 0;
 923
 924         /*
 925          * Assign my position or return error if too many already running
 926          */
 927         myiod = -1;
 928         for (i = 0; i < NFS_MAXASYNCDAEMON; i++)
 929                 if (nfs_asyncdaemon[i] == 0) {
 930                         nfs_asyncdaemon[i]++;
 931                         myiod = i;
 932                         break;
 933                 }
 934         if (myiod == -1)
 935                 return (EBUSY);
 936         nfs_numasync++;
 937         /*
 938          * Just loop around doin our stuff until SIGKILL
 939          */
 940         for (;;) {
 941             while (((nmp = nfs_iodmount[myiod]) == NULL
 942                      || TAILQ_EMPTY(&nmp->nm_bufq))
 943                    && error == 0) {
 944                 if (nmp)
 945                     nmp->nm_bufqiods--;
 946                 nfs_iodwant[myiod] = td;
 947                 nfs_iodmount[myiod] = NULL;
 948                 error = tsleep((caddr_t)&nfs_iodwant[myiod],
 949                         PCATCH, "nfsidl", 0);
 950             }
 951             if (error) {
 952                 nfs_asyncdaemon[myiod] = 0;
 953                 if (nmp)
 954                     nmp->nm_bufqiods--;
 955                 nfs_iodwant[myiod] = NULL;
 956                 nfs_iodmount[myiod] = NULL;
 957                 nfs_numasync--;
 958                 return (error);
 959             }
 960             while ((bp = TAILQ_FIRST(&nmp->nm_bufq)) != NULL) {
 961                 /* Take one off the front of the list */
 962                 TAILQ_REMOVE(&nmp->nm_bufq, bp, b_freelist);
 963                 nmp->nm_bufqlen--;
 964                 if (nmp->nm_bufqwant && nmp->nm_bufqlen <= nfs_numasync) {
 965                     nmp->nm_bufqwant = FALSE;
 966                     wakeup(&nmp->nm_bufq);
 967                 }
 968                 (void) nfs_doio(bp, NULL);
 969                 /*
 970                  * If there are more than one iod on this mount, then defect
 971                  * so that the iods can be shared out fairly between the mounts
 972                  */
 973                 if (nfs_defect && nmp->nm_bufqiods > 1) {
 974                     NFS_DPF(ASYNCIO,
 975                             ("nfssvc_iod: iod %d defecting from mount %p\n",
 976                              myiod, nmp));
 977                     nfs_iodmount[myiod] = NULL;
 978                     nmp->nm_bufqiods--;
 979                     break;
 980                 }
 981             }
 982         }
 983 }
 984
 985
 986 /*
 987  * Get an authorization string for the uid by having the mount_nfs sitting
 988  * on this mount point porpous out of the kernel and do it.
 989  */
 990 int
 991 nfs_getauth(struct nfsmount *nmp, struct nfsreq *rep,
 992             struct ucred *cred, char **auth_str, int *auth_len, char *verf_str,
 993             int *verf_len, NFSKERBKEY_T key /* return session key */)
 994 {
 995         int error = 0;
 996
 997         while ((nmp->nm_state & NFSSTA_WAITAUTH) == 0) {
 998                 nmp->nm_state |= NFSSTA_WANTAUTH;
 999                 (void) tsleep((caddr_t)&nmp->nm_authtype, 0,
1000                         "nfsauth1", 2 * hz);
1001                 error = nfs_sigintr(nmp, rep, rep->r_td);
1002                 if (error) {
1003                         nmp->nm_state &= ~NFSSTA_WANTAUTH;
1004                         return (error);
1005                 }
1006         }
1007         nmp->nm_state &= ~(NFSSTA_WAITAUTH | NFSSTA_WANTAUTH);
1008         nmp->nm_authstr = *auth_str = (char *)malloc(RPCAUTH_MAXSIZ, M_TEMP, M_WAITOK);
1009         nmp->nm_authlen = RPCAUTH_MAXSIZ;
1010         nmp->nm_verfstr = verf_str;
1011         nmp->nm_verflen = *verf_len;
1012         nmp->nm_authuid = cred->cr_uid;
1013         wakeup((caddr_t)&nmp->nm_authstr);
1014
1015         /*
1016          * And wait for mount_nfs to do its stuff.
1017          */
1018         while ((nmp->nm_state & NFSSTA_HASAUTH) == 0 && error == 0) {
1019                 (void) tsleep((caddr_t)&nmp->nm_authlen, 0,
1020                         "nfsauth2", 2 * hz);
1021                 error = nfs_sigintr(nmp, rep, rep->r_td);
1022         }
1023         if (nmp->nm_state & NFSSTA_AUTHERR) {
1024                 nmp->nm_state &= ~NFSSTA_AUTHERR;
1025                 error = EAUTH;
1026         }
1027         if (error)
1028                 free((caddr_t)*auth_str, M_TEMP);
1029         else {
1030                 *auth_len = nmp->nm_authlen;
1031                 *verf_len = nmp->nm_verflen;
1032                 bcopy((caddr_t)nmp->nm_key, (caddr_t)key, sizeof (key));
1033         }
1034         nmp->nm_state &= ~NFSSTA_HASAUTH;
1035         nmp->nm_state |= NFSSTA_WAITAUTH;
1036         if (nmp->nm_state & NFSSTA_WANTAUTH) {
1037                 nmp->nm_state &= ~NFSSTA_WANTAUTH;
1038                 wakeup((caddr_t)&nmp->nm_authtype);
1039         }
1040         return (error);
1041 }
1042
1043 /*
1044  * Get a nickname authenticator and verifier.
1045  */
1046 int
1047 nfs_getnickauth(struct nfsmount *nmp, struct ucred *cred, char **auth_str,
1048                 int *auth_len, char *verf_str, int verf_len)
1049 {
1050         struct nfsuid *nuidp;
1051         u_int32_t *nickp, *verfp;
1052         struct timeval ktvin, ktvout;
1053
1054 #ifdef DIAGNOSTIC
1055         if (verf_len < (4 * NFSX_UNSIGNED))
1056                 panic("nfs_getnickauth verf too small");
1057 #endif
1058         for (nuidp = NMUIDHASH(nmp, cred->cr_uid)->lh_first;
1059             nuidp != 0; nuidp = nuidp->nu_hash.le_next) {
1060                 if (nuidp->nu_cr.cr_uid == cred->cr_uid)
1061                         break;
1062         }
1063         if (!nuidp || nuidp->nu_expire < time_second)
1064                 return (EACCES);
1065
1066         /*
1067          * Move to the end of the lru list (end of lru == most recently used).
1068          */
1069         TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru);
1070         TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, nu_lru);
1071
1072         nickp = (u_int32_t *)malloc(2 * NFSX_UNSIGNED, M_TEMP, M_WAITOK);
1073         *nickp++ = txdr_unsigned(RPCAKN_NICKNAME);
1074         *nickp = txdr_unsigned(nuidp->nu_nickname);
1075         *auth_str = (char *)nickp;
1076         *auth_len = 2 * NFSX_UNSIGNED;
1077
1078         /*
1079          * Now we must encrypt the verifier and package it up.
1080          */
1081         verfp = (u_int32_t *)verf_str;
1082         *verfp++ = txdr_unsigned(RPCAKN_NICKNAME);
1083         if (time_second > nuidp->nu_timestamp.tv_sec ||
1084             (time_second == nuidp->nu_timestamp.tv_sec &&
1085              time_second > nuidp->nu_timestamp.tv_usec))
1086                 getmicrotime(&nuidp->nu_timestamp);
1087         else
1088                 nuidp->nu_timestamp.tv_usec++;
1089         ktvin.tv_sec = txdr_unsigned(nuidp->nu_timestamp.tv_sec);
1090         ktvin.tv_usec = txdr_unsigned(nuidp->nu_timestamp.tv_usec);
1091
1092         /*
1093          * Now encrypt the timestamp verifier in ecb mode using the session
1094          * key.
1095          */
1096 #ifdef NFSKERB
1097         XXX
1098 #endif
1099
1100         *verfp++ = ktvout.tv_sec;
1101         *verfp++ = ktvout.tv_usec;
1102         *verfp = 0;
1103         return (0);
1104 }
1105
1106 /*
1107  * Save the current nickname in a hash list entry on the mount point.
1108  */
1109 int
1110 nfs_savenickauth(struct nfsmount *nmp, struct ucred *cred, int len,
1111                  NFSKERBKEY_T key, struct mbuf **mdp, char **dposp,
1112                  struct mbuf *mrep)
1113 {
1114         struct nfsuid *nuidp;
1115         u_int32_t *tl;
1116         int32_t t1;
1117         struct mbuf *md = *mdp;
1118         struct timeval ktvin, ktvout;
1119         u_int32_t nick;
1120         char *dpos = *dposp, *cp2;
1121         int deltasec, error = 0;
1122
1123         if (len == (3 * NFSX_UNSIGNED)) {
1124                 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
1125                 ktvin.tv_sec = *tl++;
1126                 ktvin.tv_usec = *tl++;
1127                 nick = fxdr_unsigned(u_int32_t, *tl);
1128
1129                 /*
1130                  * Decrypt the timestamp in ecb mode.
1131                  */
1132 #ifdef NFSKERB
1133                 XXX
1134 #endif
1135                 ktvout.tv_sec = fxdr_unsigned(long, ktvout.tv_sec);
1136                 ktvout.tv_usec = fxdr_unsigned(long, ktvout.tv_usec);
1137                 deltasec = time_second - ktvout.tv_sec;
1138                 if (deltasec < 0)
1139                         deltasec = -deltasec;
1140                 /*
1141                  * If ok, add it to the hash list for the mount point.
1142                  */
1143                 if (deltasec <= NFS_KERBCLOCKSKEW) {
1144                         if (nmp->nm_numuids < nuidhash_max) {
1145                                 nmp->nm_numuids++;
1146                                 nuidp = (struct nfsuid *)
1147                                    malloc(sizeof (struct nfsuid), M_NFSUID,
1148                                         M_WAITOK);
1149                         } else {
1150                                 nuidp = TAILQ_FIRST(&nmp->nm_uidlruhead);
1151                                 LIST_REMOVE(nuidp, nu_hash);
1152                                 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp,
1153                                         nu_lru);
1154                         }
1155                         nuidp->nu_flag = 0;
1156                         nuidp->nu_cr.cr_uid = cred->cr_uid;
1157                         nuidp->nu_expire = time_second + NFS_KERBTTL;
1158                         nuidp->nu_timestamp = ktvout;
1159                         nuidp->nu_nickname = nick;
1160                         bcopy(key, nuidp->nu_key, sizeof (key));
1161                         TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp,
1162                                 nu_lru);
1163                         LIST_INSERT_HEAD(NMUIDHASH(nmp, cred->cr_uid),
1164                                 nuidp, nu_hash);
1165                 }
1166         } else
1167                 nfsm_adv(nfsm_rndup(len));
1168 nfsmout:
1169         *mdp = md;
1170         *dposp = dpos;
1171         return (error);
1172 }