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 1.22 2006/02/17 19:18:07 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 #include <sys/thread2.h>
  76
  77 static MALLOC_DEFINE(M_NFSSVC, "NFS srvsock", "Nfs server structure");
  78
  79 /* Global defs. */
  80 extern int32_t (*nfsrv3_procs[NFS_NPROCS]) (struct nfsrv_descript *nd,
  81                                             struct nfssvc_sock *slp,
  82                                             struct thread *td,
  83                                             struct mbuf **mreqp);
  84 extern int nfs_numasync;
  85 extern time_t nqnfsstarttime;
  86 extern int nqsrv_writeslack;
  87 extern int nfsrtton;
  88 extern struct nfsstats nfsstats;
  89 extern int nfsrvw_procrastinate;
  90 extern int nfsrvw_procrastinate_v3;
  91 static int nuidhash_max = NFS_MAXUIDHASH;
  92
  93 #ifndef NFS_NOSERVER
  94 static void     nfsrv_zapsock (struct nfssvc_sock *slp);
  95 #endif
  96 static int      nfssvc_iod (struct thread *);
  97
  98 #define TRUE    1
  99 #define FALSE   0
 100
 101 static int nfs_asyncdaemon[NFS_MAXASYNCDAEMON];
 102
 103 SYSCTL_DECL(_vfs_nfs);
 104
 105 #ifndef NFS_NOSERVER
 106 int nfsd_waiting = 0;
 107 static struct nfsdrt nfsdrt;
 108 static int nfs_numnfsd = 0;
 109 static int notstarted = 1;
 110 static int modify_flag = 0;
 111 static void     nfsd_rt (int sotype, struct nfsrv_descript *nd,
 112                              int cacherep);
 113 static int      nfssvc_addsock (struct file *, struct sockaddr *,
 114                                     struct thread *);
 115 static int      nfssvc_nfsd (struct nfsd_srvargs *,caddr_t,struct thread *);
 116
 117 static int nfs_privport = 0;
 118 SYSCTL_INT(_vfs_nfs, NFS_NFSPRIVPORT, nfs_privport, CTLFLAG_RW, &nfs_privport, 0, "");
 119 SYSCTL_INT(_vfs_nfs, OID_AUTO, gatherdelay, CTLFLAG_RW, &nfsrvw_procrastinate, 0, "");
 120 SYSCTL_INT(_vfs_nfs, OID_AUTO, gatherdelay_v3, CTLFLAG_RW, &nfsrvw_procrastinate_v3, 0, "");
 121 static int      nfs_soreserve = 65535;
 122 SYSCTL_INT(_vfs_nfs, OID_AUTO, soreserve, CTLFLAG_RW, &nfs_soreserve, 0, "");
 123
 124 /*
 125  * NFS server system calls
 126  */
 127
 128 #endif /* NFS_NOSERVER */
 129 /*
 130  * nfssvc_args(int flag, caddr_t argp)
 131  *
 132  * Nfs server psuedo system call for the nfsd's
 133  * Based on the flag value it either:
 134  * - adds a socket to the selection list
 135  * - remains in the kernel as an nfsd
 136  * - remains in the kernel as an nfsiod
 137  */
 138 int
 139 nfssvc(struct nfssvc_args *uap)
 140 {
 141 #ifndef NFS_NOSERVER
 142         struct nlookupdata nd;
 143         struct file *fp;
 144         struct sockaddr *nam;
 145         struct nfsd_args nfsdarg;
 146         struct nfsd_srvargs nfsd_srvargs, *nsd = &nfsd_srvargs;
 147         struct nfsd_cargs ncd;
 148         struct nfsd *nfsd;
 149         struct nfssvc_sock *slp;
 150         struct nfsuid *nuidp;
 151         struct nfsmount *nmp;
 152         struct vnode *vp;
 153 #endif /* NFS_NOSERVER */
 154         int error;
 155         struct thread *td = curthread;
 156
 157         /*
 158          * Must be super user
 159          */
 160         error = suser(td);
 161         if(error)
 162                 return (error);
 163         KKASSERT(td->td_proc);  /* for ucred and p_fd */
 164         while (nfssvc_sockhead_flag & SLP_INIT) {
 165                  nfssvc_sockhead_flag |= SLP_WANTINIT;
 166                 (void) tsleep((caddr_t)&nfssvc_sockhead, 0, "nfsd init", 0);
 167         }
 168         if (uap->flag & NFSSVC_BIOD)
 169                 error = nfssvc_iod(td);
 170 #ifdef NFS_NOSERVER
 171         else
 172                 error = ENXIO;
 173 #else /* !NFS_NOSERVER */
 174         else if (uap->flag & NFSSVC_MNTD) {
 175                 error = copyin(uap->argp, (caddr_t)&ncd, sizeof (ncd));
 176                 if (error)
 177                         return (error);
 178                 vp = NULL;
 179                 error = nlookup_init(&nd, ncd.ncd_dirp, UIO_USERSPACE,
 180                                         NLC_FOLLOW);
 181                 if (error == 0)
 182                         error = nlookup(&nd);
 183                 if (error == 0)
 184                         error = cache_vget(nd.nl_ncp, nd.nl_cred, LK_EXCLUSIVE, &vp);
 185                 nlookup_done(&nd);
 186                 if (error)
 187                         return (error);
 188
 189                 if ((vp->v_flag & VROOT) == 0)
 190                         error = EINVAL;
 191                 nmp = VFSTONFS(vp->v_mount);
 192                 vput(vp);
 193                 if (error)
 194                         return (error);
 195                 if ((nmp->nm_state & NFSSTA_MNTD) &&
 196                         (uap->flag & NFSSVC_GOTAUTH) == 0)
 197                         return (0);
 198                 nmp->nm_state |= NFSSTA_MNTD;
 199                 error = nqnfs_clientd(nmp, td->td_proc->p_ucred, &ncd, uap->flag,
 200                         uap->argp, td);
 201         } else if (uap->flag & NFSSVC_ADDSOCK) {
 202                 error = copyin(uap->argp, (caddr_t)&nfsdarg, sizeof(nfsdarg));
 203                 if (error)
 204                         return (error);
 205                 error = holdsock(td->td_proc->p_fd, nfsdarg.sock, &fp);
 206                 if (error)
 207                         return (error);
 208                 /*
 209                  * Get the client address for connected sockets.
 210                  */
 211                 if (nfsdarg.name == NULL || nfsdarg.namelen == 0)
 212                         nam = (struct sockaddr *)0;
 213                 else {
 214                         error = getsockaddr(&nam, nfsdarg.name,
 215                                             nfsdarg.namelen);
 216                         if (error) {
 217                                 fdrop(fp, td);
 218                                 return (error);
 219                         }
 220                 }
 221                 error = nfssvc_addsock(fp, nam, td);
 222                 fdrop(fp, td);
 223         } else {
 224                 error = copyin(uap->argp, (caddr_t)nsd, sizeof (*nsd));
 225                 if (error)
 226                         return (error);
 227                 if ((uap->flag & NFSSVC_AUTHIN) &&
 228                     ((nfsd = nsd->nsd_nfsd)) != NULL &&
 229                     (nfsd->nfsd_slp->ns_flag & SLP_VALID)) {
 230                         slp = nfsd->nfsd_slp;
 231
 232                         /*
 233                          * First check to see if another nfsd has already
 234                          * added this credential.
 235                          */
 236                         for (nuidp = NUIDHASH(slp,nsd->nsd_cr.cr_uid)->lh_first;
 237                             nuidp != 0; nuidp = nuidp->nu_hash.le_next) {
 238                                 if (nuidp->nu_cr.cr_uid == nsd->nsd_cr.cr_uid &&
 239                                     (!nfsd->nfsd_nd->nd_nam2 ||
 240                                      netaddr_match(NU_NETFAM(nuidp),
 241                                      &nuidp->nu_haddr, nfsd->nfsd_nd->nd_nam2)))
 242                                         break;
 243                         }
 244                         if (nuidp) {
 245                             nfsrv_setcred(&nuidp->nu_cr,&nfsd->nfsd_nd->nd_cr);
 246                             nfsd->nfsd_nd->nd_flag |= ND_KERBFULL;
 247                         } else {
 248                             /*
 249                              * Nope, so we will.
 250                              */
 251                             if (slp->ns_numuids < nuidhash_max) {
 252                                 slp->ns_numuids++;
 253                                 nuidp = (struct nfsuid *)
 254                                    malloc(sizeof (struct nfsuid), M_NFSUID,
 255                                         M_WAITOK);
 256                             } else
 257                                 nuidp = (struct nfsuid *)0;
 258                             if ((slp->ns_flag & SLP_VALID) == 0) {
 259                                 if (nuidp)
 260                                     free((caddr_t)nuidp, M_NFSUID);
 261                             } else {
 262                                 if (nuidp == (struct nfsuid *)0) {
 263                                     nuidp = TAILQ_FIRST(&slp->ns_uidlruhead);
 264                                     LIST_REMOVE(nuidp, nu_hash);
 265                                     TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp,
 266                                         nu_lru);
 267                                     if (nuidp->nu_flag & NU_NAM)
 268                                         FREE(nuidp->nu_nam, M_SONAME);
 269                                 }
 270                                 nuidp->nu_flag = 0;
 271                                 nuidp->nu_cr = nsd->nsd_cr;
 272                                 if (nuidp->nu_cr.cr_ngroups > NGROUPS)
 273                                     nuidp->nu_cr.cr_ngroups = NGROUPS;
 274                                 nuidp->nu_cr.cr_ref = 1;
 275                                 nuidp->nu_timestamp = nsd->nsd_timestamp;
 276                                 nuidp->nu_expire = time_second + nsd->nsd_ttl;
 277                                 /*
 278                                  * and save the session key in nu_key.
 279                                  */
 280                                 bcopy(nsd->nsd_key, nuidp->nu_key,
 281                                     sizeof (nsd->nsd_key));
 282                                 if (nfsd->nfsd_nd->nd_nam2) {
 283                                     struct sockaddr_in *saddr;
 284
 285                                     saddr = (struct sockaddr_in *)
 286                                             nfsd->nfsd_nd->nd_nam2;
 287                                     switch (saddr->sin_family) {
 288                                     case AF_INET:
 289                                         nuidp->nu_flag |= NU_INETADDR;
 290                                         nuidp->nu_inetaddr =
 291                                              saddr->sin_addr.s_addr;
 292                                         break;
 293                                     case AF_ISO:
 294                                     default:
 295                                         nuidp->nu_flag |= NU_NAM;
 296                                         nuidp->nu_nam =
 297                                           dup_sockaddr(nfsd->nfsd_nd->nd_nam2);
 298                                         break;
 299                                     };
 300                                 }
 301                                 TAILQ_INSERT_TAIL(&slp->ns_uidlruhead, nuidp,
 302                                         nu_lru);
 303                                 LIST_INSERT_HEAD(NUIDHASH(slp, nsd->nsd_uid),
 304                                         nuidp, nu_hash);
 305                                 nfsrv_setcred(&nuidp->nu_cr,
 306                                     &nfsd->nfsd_nd->nd_cr);
 307                                 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL;
 308                             }
 309                         }
 310                 }
 311                 if ((uap->flag & NFSSVC_AUTHINFAIL) && (nfsd = nsd->nsd_nfsd))
 312                         nfsd->nfsd_flag |= NFSD_AUTHFAIL;
 313                 error = nfssvc_nfsd(nsd, uap->argp, td);
 314         }
 315 #endif /* NFS_NOSERVER */
 316         if (error == EINTR || error == ERESTART)
 317                 error = 0;
 318         return (error);
 319 }
 320
 321 #ifndef NFS_NOSERVER
 322 /*
 323  * Adds a socket to the list for servicing by nfsds.
 324  */
 325 static int
 326 nfssvc_addsock(struct file *fp, struct sockaddr *mynam, struct thread *td)
 327 {
 328         int siz;
 329         struct nfssvc_sock *slp;
 330         struct socket *so;
 331         int error;
 332
 333         so = (struct socket *)fp->f_data;
 334 #if 0
 335         tslp = (struct nfssvc_sock *)0;
 336         /*
 337          * Add it to the list, as required.
 338          */
 339         if (so->so_proto->pr_protocol == IPPROTO_UDP) {
 340                 tslp = nfs_udpsock;
 341                 if (tslp->ns_flag & SLP_VALID) {
 342                         if (mynam != NULL)
 343                                 FREE(mynam, M_SONAME);
 344                         return (EPERM);
 345                 }
 346         }
 347 #endif
 348         /*
 349          * Reserve buffer space in the socket.  Note that due to bugs in
 350          * Linux's delayed-ack code, serious performance degredation may
 351          * occur with linux hosts if the minimum is used.
 352          */
 353         if (so->so_type == SOCK_STREAM)
 354                 siz = NFS_MAXPACKET + sizeof (u_long);
 355         else
 356                 siz = NFS_MAXPACKET;
 357         if (siz < nfs_soreserve)
 358             siz = nfs_soreserve;
 359         if (siz > sb_max_adj) {
 360             printf("Warning: vfs.nfs.soreserve (%d) "
 361                 "limited to adjusted sb_max (%ld)\n",
 362                 nfs_soreserve, sb_max_adj);
 363             siz = sb_max_adj;
 364         }
 365
 366         error = soreserve(so, siz, siz, &td->td_proc->p_rlimit[RLIMIT_SBSIZE]);
 367         if (error) {
 368                 if (mynam != NULL)
 369                         FREE(mynam, M_SONAME);
 370                 return (error);
 371         }
 372
 373         /*
 374          * Set protocol specific options { for now TCP only } and
 375          * reserve some space. For datagram sockets, this can get called
 376          * repeatedly for the same socket, but that isn't harmful.
 377          */
 378         if (so->so_type == SOCK_STREAM) {
 379                 struct sockopt sopt;
 380                 int val;
 381
 382                 bzero(&sopt, sizeof sopt);
 383                 sopt.sopt_level = SOL_SOCKET;
 384                 sopt.sopt_name = SO_KEEPALIVE;
 385                 sopt.sopt_val = &val;
 386                 sopt.sopt_valsize = sizeof val;
 387                 val = 1;
 388                 sosetopt(so, &sopt);
 389         }
 390         if (so->so_proto->pr_domain->dom_family == AF_INET &&
 391             so->so_proto->pr_protocol == IPPROTO_TCP) {
 392                 struct sockopt sopt;
 393                 int val;
 394
 395                 bzero(&sopt, sizeof sopt);
 396                 sopt.sopt_level = IPPROTO_TCP;
 397                 sopt.sopt_name = TCP_NODELAY;
 398                 sopt.sopt_val = &val;
 399                 sopt.sopt_valsize = sizeof val;
 400                 val = 1;
 401                 sosetopt(so, &sopt);
 402         }
 403         so->so_rcv.sb_flags &= ~SB_NOINTR;
 404         so->so_rcv.sb_timeo = 0;
 405         so->so_snd.sb_flags &= ~SB_NOINTR;
 406         so->so_snd.sb_timeo = 0;
 407
 408         slp = (struct nfssvc_sock *)
 409                 malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK);
 410         bzero((caddr_t)slp, sizeof (struct nfssvc_sock));
 411         STAILQ_INIT(&slp->ns_rec);
 412         TAILQ_INIT(&slp->ns_uidlruhead);
 413         TAILQ_INSERT_TAIL(&nfssvc_sockhead, slp, ns_chain);
 414
 415         slp->ns_so = so;
 416         slp->ns_nam = mynam;
 417         fp->f_count++;
 418         slp->ns_fp = fp;
 419         crit_enter();
 420         so->so_upcallarg = (caddr_t)slp;
 421         so->so_upcall = nfsrv_rcv;
 422         so->so_rcv.sb_flags |= SB_UPCALL;
 423         slp->ns_flag = (SLP_VALID | SLP_NEEDQ);
 424         nfsrv_wakenfsd(slp, 1);
 425         crit_exit();
 426         return (0);
 427 }
 428
 429 /*
 430  * Called by nfssvc() for nfsds. Just loops around servicing rpc requests
 431  * until it is killed by a signal.
 432  */
 433 static int
 434 nfssvc_nfsd(struct nfsd_srvargs *nsd, caddr_t argp, struct thread *td)
 435 {
 436         int siz;
 437         struct nfssvc_sock *slp;
 438         struct nfsd *nfsd = nsd->nsd_nfsd;
 439         struct nfsrv_descript *nd = NULL;
 440         struct mbuf *m, *mreq;
 441         int error = 0, cacherep, sotype, writes_todo;
 442         int procrastinate;
 443         u_quad_t cur_usec;
 444
 445 #ifndef nolint
 446         cacherep = RC_DOIT;
 447         writes_todo = 0;
 448 #endif
 449         if (nfsd == (struct nfsd *)0) {
 450                 nsd->nsd_nfsd = nfsd = (struct nfsd *)
 451                         malloc(sizeof (struct nfsd), M_NFSD, M_WAITOK);
 452                 bzero((caddr_t)nfsd, sizeof (struct nfsd));
 453                 crit_enter();
 454                 nfsd->nfsd_td = td;
 455                 TAILQ_INSERT_TAIL(&nfsd_head, nfsd, nfsd_chain);
 456                 nfs_numnfsd++;
 457         } else
 458                 crit_enter();
 459
 460         /*
 461          * Loop getting rpc requests until SIGKILL.
 462          */
 463         for (;;) {
 464                 if ((nfsd->nfsd_flag & NFSD_REQINPROG) == 0) {
 465                         while (nfsd->nfsd_slp == NULL &&
 466                             (nfsd_head_flag & NFSD_CHECKSLP) == 0) {
 467                                 nfsd->nfsd_flag |= NFSD_WAITING;
 468                                 nfsd_waiting++;
 469                                 error = tsleep((caddr_t)nfsd, PCATCH, "nfsd", 0);
 470                                 nfsd_waiting--;
 471                                 if (error)
 472                                         goto done;
 473                         }
 474                         if (nfsd->nfsd_slp == NULL &&
 475                             (nfsd_head_flag & NFSD_CHECKSLP) != 0) {
 476                                 TAILQ_FOREACH(slp, &nfssvc_sockhead, ns_chain) {
 477                                     if ((slp->ns_flag & (SLP_VALID | SLP_DOREC))
 478                                         == (SLP_VALID | SLP_DOREC)) {
 479                                             slp->ns_flag &= ~SLP_DOREC;
 480                                             slp->ns_sref++;
 481                                             nfsd->nfsd_slp = slp;
 482                                             break;
 483                                     }
 484                                 }
 485                                 if (slp == 0)
 486                                         nfsd_head_flag &= ~NFSD_CHECKSLP;
 487                         }
 488                         if ((slp = nfsd->nfsd_slp) == (struct nfssvc_sock *)0)
 489                                 continue;
 490                         if (slp->ns_flag & SLP_VALID) {
 491                                 if (slp->ns_flag & SLP_DISCONN)
 492                                         nfsrv_zapsock(slp);
 493                                 else if (slp->ns_flag & SLP_NEEDQ) {
 494                                         slp->ns_flag &= ~SLP_NEEDQ;
 495                                         (void) nfs_slplock(slp, 1);
 496                                         nfsrv_rcv(slp->ns_so, (caddr_t)slp,
 497                                                 MB_WAIT);
 498                                         nfs_slpunlock(slp);
 499                                 }
 500                                 error = nfsrv_dorec(slp, nfsd, &nd);
 501                                 cur_usec = nfs_curusec();
 502                                 if (error && slp->ns_tq.lh_first &&
 503                                     slp->ns_tq.lh_first->nd_time <= cur_usec) {
 504                                         error = 0;
 505                                         cacherep = RC_DOIT;
 506                                         writes_todo = 1;
 507                                 } else
 508                                         writes_todo = 0;
 509                                 nfsd->nfsd_flag |= NFSD_REQINPROG;
 510                         }
 511                 } else {
 512                         error = 0;
 513                         slp = nfsd->nfsd_slp;
 514                 }
 515                 if (error || (slp->ns_flag & SLP_VALID) == 0) {
 516                         if (nd) {
 517                                 free((caddr_t)nd, M_NFSRVDESC);
 518                                 nd = NULL;
 519                         }
 520                         nfsd->nfsd_slp = (struct nfssvc_sock *)0;
 521                         nfsd->nfsd_flag &= ~NFSD_REQINPROG;
 522                         nfsrv_slpderef(slp);
 523                         continue;
 524                 }
 525                 crit_exit();
 526                 sotype = slp->ns_so->so_type;
 527                 if (nd) {
 528                     getmicrotime(&nd->nd_starttime);
 529                     if (nd->nd_nam2)
 530                         nd->nd_nam = nd->nd_nam2;
 531                     else
 532                         nd->nd_nam = slp->ns_nam;
 533
 534                     /*
 535                      * Check to see if authorization is needed.
 536                      */
 537                     if (nfsd->nfsd_flag & NFSD_NEEDAUTH) {
 538                         nfsd->nfsd_flag &= ~NFSD_NEEDAUTH;
 539                         nsd->nsd_haddr =
 540                                 ((struct sockaddr_in *)
 541                                  nd->nd_nam)->sin_addr.s_addr;
 542                         nsd->nsd_authlen = nfsd->nfsd_authlen;
 543                         nsd->nsd_verflen = nfsd->nfsd_verflen;
 544                         if (!copyout(nfsd->nfsd_authstr,nsd->nsd_authstr,
 545                                 nfsd->nfsd_authlen) &&
 546                             !copyout(nfsd->nfsd_verfstr, nsd->nsd_verfstr,
 547                                 nfsd->nfsd_verflen) &&
 548                             !copyout((caddr_t)nsd, argp, sizeof (*nsd)))
 549                             return (ENEEDAUTH);
 550                         cacherep = RC_DROPIT;
 551                     } else
 552                         cacherep = nfsrv_getcache(nd, slp, &mreq);
 553
 554                     /*
 555                      * Check for just starting up for NQNFS and send
 556                      * fake "try again later" replies to the NQNFS clients.
 557                      */
 558                     if (notstarted && nqnfsstarttime <= time_second) {
 559                         if (modify_flag) {
 560                                 nqnfsstarttime = time_second + nqsrv_writeslack;
 561                                 modify_flag = 0;
 562                         } else
 563                                 notstarted = 0;
 564                     }
 565                     if (notstarted) {
 566                         if ((nd->nd_flag & ND_NQNFS) == 0)
 567                                 cacherep = RC_DROPIT;
 568                         else if (nd->nd_procnum != NFSPROC_WRITE) {
 569                                 nd->nd_procnum = NFSPROC_NOOP;
 570                                 nd->nd_repstat = NQNFS_TRYLATER;
 571                                 cacherep = RC_DOIT;
 572                         } else
 573                                 modify_flag = 1;
 574                     } else if (nfsd->nfsd_flag & NFSD_AUTHFAIL) {
 575                         nfsd->nfsd_flag &= ~NFSD_AUTHFAIL;
 576                         nd->nd_procnum = NFSPROC_NOOP;
 577                         nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
 578                         cacherep = RC_DOIT;
 579                     } else if (nfs_privport) {
 580                         /* Check if source port is privileged */
 581                         u_short port;
 582                         struct sockaddr *nam = nd->nd_nam;
 583                         struct sockaddr_in *sin;
 584
 585                         sin = (struct sockaddr_in *)nam;
 586                         port = ntohs(sin->sin_port);
 587                         if (port >= IPPORT_RESERVED &&
 588                             nd->nd_procnum != NFSPROC_NULL) {
 589                             nd->nd_procnum = NFSPROC_NOOP;
 590                             nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
 591                             cacherep = RC_DOIT;
 592                             printf("NFS request from unprivileged port (%s:%d)\n",
 593                                    inet_ntoa(sin->sin_addr), port);
 594                         }
 595                     }
 596
 597                 }
 598
 599                 /*
 600                  * Loop to get all the write rpc relies that have been
 601                  * gathered together.
 602                  */
 603                 do {
 604                     switch (cacherep) {
 605                     case RC_DOIT:
 606                         if (nd && (nd->nd_flag & ND_NFSV3))
 607                             procrastinate = nfsrvw_procrastinate_v3;
 608                         else
 609                             procrastinate = nfsrvw_procrastinate;
 610                         if (writes_todo || (nd->nd_procnum == NFSPROC_WRITE &&
 611                             procrastinate > 0 && !notstarted))
 612                             error = nfsrv_writegather(&nd, slp,
 613                                 nfsd->nfsd_td, &mreq);
 614                         else
 615                             error = (*(nfsrv3_procs[nd->nd_procnum]))(nd,
 616                                 slp, nfsd->nfsd_td, &mreq);
 617                         if (mreq == NULL)
 618                                 break;
 619                         if (error != 0 && error != NFSERR_RETVOID) {
 620                                 if (nd->nd_procnum != NQNFSPROC_VACATED)
 621                                         nfsstats.srv_errs++;
 622                                 nfsrv_updatecache(nd, FALSE, mreq);
 623                                 if (nd->nd_nam2)
 624                                         FREE(nd->nd_nam2, M_SONAME);
 625                                 break;
 626                         }
 627                         nfsstats.srvrpccnt[nd->nd_procnum]++;
 628                         nfsrv_updatecache(nd, TRUE, mreq);
 629                         nd->nd_mrep = (struct mbuf *)0;
 630                     case RC_REPLY:
 631                         m = mreq;
 632                         siz = 0;
 633                         while (m) {
 634                                 siz += m->m_len;
 635                                 m = m->m_next;
 636                         }
 637                         if (siz <= 0 || siz > NFS_MAXPACKET) {
 638                                 printf("mbuf siz=%d\n",siz);
 639                                 panic("Bad nfs svc reply");
 640                         }
 641                         m = mreq;
 642                         m->m_pkthdr.len = siz;
 643                         m->m_pkthdr.rcvif = (struct ifnet *)0;
 644                         /*
 645                          * For stream protocols, prepend a Sun RPC
 646                          * Record Mark.
 647                          */
 648                         if (sotype == SOCK_STREAM) {
 649                                 M_PREPEND(m, NFSX_UNSIGNED, MB_WAIT);
 650                                 if (m == NULL)
 651                                         return (ENOBUFS);
 652                                 *mtod(m, u_int32_t *) = htonl(0x80000000 | siz);
 653                         }
 654                         if (slp->ns_so->so_proto->pr_flags & PR_CONNREQUIRED)
 655                                 (void) nfs_slplock(slp, 1);
 656                         if (slp->ns_flag & SLP_VALID)
 657                             error = nfs_send(slp->ns_so, nd->nd_nam2, m, NULL);
 658                         else {
 659                             error = EPIPE;
 660                             m_freem(m);
 661                         }
 662                         if (nfsrtton)
 663                                 nfsd_rt(sotype, nd, cacherep);
 664                         if (nd->nd_nam2)
 665                                 FREE(nd->nd_nam2, M_SONAME);
 666                         if (nd->nd_mrep)
 667                                 m_freem(nd->nd_mrep);
 668                         if (error == EPIPE)
 669                                 nfsrv_zapsock(slp);
 670                         if (slp->ns_so->so_proto->pr_flags & PR_CONNREQUIRED)
 671                                 nfs_slpunlock(slp);
 672                         if (error == EINTR || error == ERESTART) {
 673                                 free((caddr_t)nd, M_NFSRVDESC);
 674                                 nfsrv_slpderef(slp);
 675                                 crit_enter();
 676                                 goto done;
 677                         }
 678                         break;
 679                     case RC_DROPIT:
 680                         if (nfsrtton)
 681                                 nfsd_rt(sotype, nd, cacherep);
 682                         m_freem(nd->nd_mrep);
 683                         if (nd->nd_nam2)
 684                                 FREE(nd->nd_nam2, M_SONAME);
 685                         break;
 686                     };
 687                     if (nd) {
 688                         FREE((caddr_t)nd, M_NFSRVDESC);
 689                         nd = NULL;
 690                     }
 691
 692                     /*
 693                      * Check to see if there are outstanding writes that
 694                      * need to be serviced.
 695                      */
 696                     cur_usec = nfs_curusec();
 697                     crit_enter();
 698                     if (slp->ns_tq.lh_first &&
 699                         slp->ns_tq.lh_first->nd_time <= cur_usec) {
 700                         cacherep = RC_DOIT;
 701                         writes_todo = 1;
 702                     } else
 703                         writes_todo = 0;
 704                     crit_exit();
 705                 } while (writes_todo);
 706                 crit_enter();
 707                 if (nfsrv_dorec(slp, nfsd, &nd)) {
 708                         nfsd->nfsd_flag &= ~NFSD_REQINPROG;
 709                         nfsd->nfsd_slp = NULL;
 710                         nfsrv_slpderef(slp);
 711                 }
 712         }
 713 done:
 714         TAILQ_REMOVE(&nfsd_head, nfsd, nfsd_chain);
 715         crit_exit();
 716         free((caddr_t)nfsd, M_NFSD);
 717         nsd->nsd_nfsd = (struct nfsd *)0;
 718         if (--nfs_numnfsd == 0)
 719                 nfsrv_init(TRUE);       /* Reinitialize everything */
 720         return (error);
 721 }
 722
 723 /*
 724  * Shut down a socket associated with an nfssvc_sock structure.
 725  * Should be called with the send lock set, if required.
 726  * The trick here is to increment the sref at the start, so that the nfsds
 727  * will stop using it and clear ns_flag at the end so that it will not be
 728  * reassigned during cleanup.
 729  */
 730 static void
 731 nfsrv_zapsock(struct nfssvc_sock *slp)
 732 {
 733         struct nfsuid *nuidp, *nnuidp;
 734         struct nfsrv_descript *nwp, *nnwp;
 735         struct socket *so;
 736         struct file *fp;
 737         struct nfsrv_rec *rec;
 738
 739         slp->ns_flag &= ~SLP_ALLFLAGS;
 740         fp = slp->ns_fp;
 741         if (fp) {
 742                 slp->ns_fp = (struct file *)0;
 743                 so = slp->ns_so;
 744                 so->so_rcv.sb_flags &= ~SB_UPCALL;
 745                 so->so_upcall = NULL;
 746                 so->so_upcallarg = NULL;
 747                 soshutdown(so, 2);
 748                 closef(fp, NULL);
 749                 if (slp->ns_nam)
 750                         FREE(slp->ns_nam, M_SONAME);
 751                 m_freem(slp->ns_raw);
 752                 while ((rec = STAILQ_FIRST(&slp->ns_rec)) != NULL) {
 753                         --slp->ns_numrec;
 754                         STAILQ_REMOVE_HEAD(&slp->ns_rec, nr_link);
 755                         if (rec->nr_address)
 756                                 FREE(rec->nr_address, M_SONAME);
 757                         m_freem(rec->nr_packet);
 758                         free(rec, M_NFSRVDESC);
 759                 }
 760                 TAILQ_FOREACH_MUTABLE(nuidp, &slp->ns_uidlruhead, nu_lru,
 761                                       nnuidp) {
 762                         LIST_REMOVE(nuidp, nu_hash);
 763                         TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, nu_lru);
 764                         if (nuidp->nu_flag & NU_NAM)
 765                                 FREE(nuidp->nu_nam, M_SONAME);
 766                         free((caddr_t)nuidp, M_NFSUID);
 767                 }
 768                 crit_enter();
 769                 for (nwp = slp->ns_tq.lh_first; nwp; nwp = nnwp) {
 770                         nnwp = nwp->nd_tq.le_next;
 771                         LIST_REMOVE(nwp, nd_tq);
 772                         free((caddr_t)nwp, M_NFSRVDESC);
 773                 }
 774                 LIST_INIT(&slp->ns_tq);
 775                 crit_exit();
 776         }
 777 }
 778
 779 /*
 780  * Derefence a server socket structure. If it has no more references and
 781  * is no longer valid, you can throw it away.
 782  */
 783 void
 784 nfsrv_slpderef(struct nfssvc_sock *slp)
 785 {
 786         if (--(slp->ns_sref) == 0 && (slp->ns_flag & SLP_VALID) == 0) {
 787                 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain);
 788                 free((caddr_t)slp, M_NFSSVC);
 789         }
 790 }
 791
 792 /*
 793  * Lock a socket against others.
 794  */
 795 int
 796 nfs_slplock(struct nfssvc_sock *slp, int wait)
 797 {
 798         int *statep = &slp->ns_solock;
 799
 800         if (!wait && (*statep & NFSSTA_SNDLOCK))
 801                 return(0);      /* already locked, fail */
 802         while (*statep & NFSSTA_SNDLOCK) {
 803                 *statep |= NFSSTA_WANTSND;
 804                 (void) tsleep((caddr_t)statep, 0, "nfsslplck", 0);
 805         }
 806         *statep |= NFSSTA_SNDLOCK;
 807         return (1);
 808 }
 809
 810 /*
 811  * Unlock the stream socket for others.
 812  */
 813 void
 814 nfs_slpunlock(struct nfssvc_sock *slp)
 815 {
 816         int *statep = &slp->ns_solock;
 817
 818         if ((*statep & NFSSTA_SNDLOCK) == 0)
 819                 panic("nfs slpunlock");
 820         *statep &= ~NFSSTA_SNDLOCK;
 821         if (*statep & NFSSTA_WANTSND) {
 822                 *statep &= ~NFSSTA_WANTSND;
 823                 wakeup((caddr_t)statep);
 824         }
 825 }
 826
 827 /*
 828  * Initialize the data structures for the server.
 829  * Handshake with any new nfsds starting up to avoid any chance of
 830  * corruption.
 831  */
 832 void
 833 nfsrv_init(int terminating)
 834 {
 835         struct nfssvc_sock *slp, *nslp;
 836
 837         if (nfssvc_sockhead_flag & SLP_INIT)
 838                 panic("nfsd init");
 839         nfssvc_sockhead_flag |= SLP_INIT;
 840         if (terminating) {
 841                 TAILQ_FOREACH_MUTABLE(slp, &nfssvc_sockhead, ns_chain, nslp) {
 842                         if (slp->ns_flag & SLP_VALID)
 843                                 nfsrv_zapsock(slp);
 844                         TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain);
 845                         free((caddr_t)slp, M_NFSSVC);
 846                 }
 847                 nfsrv_cleancache();     /* And clear out server cache */
 848         } else
 849                 nfs_pub.np_valid = 0;
 850
 851         TAILQ_INIT(&nfssvc_sockhead);
 852         nfssvc_sockhead_flag &= ~SLP_INIT;
 853         if (nfssvc_sockhead_flag & SLP_WANTINIT) {
 854                 nfssvc_sockhead_flag &= ~SLP_WANTINIT;
 855                 wakeup((caddr_t)&nfssvc_sockhead);
 856         }
 857
 858         TAILQ_INIT(&nfsd_head);
 859         nfsd_head_flag &= ~NFSD_CHECKSLP;
 860
 861 #if 0
 862         nfs_udpsock = (struct nfssvc_sock *)
 863             malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK);
 864         bzero((caddr_t)nfs_udpsock, sizeof (struct nfssvc_sock));
 865         STAILQ_INIT(&nfs_udpsock->ns_rec);
 866         TAILQ_INIT(&nfs_udpsock->ns_uidlruhead);
 867         TAILQ_INSERT_HEAD(&nfssvc_sockhead, nfs_udpsock, ns_chain);
 868
 869         nfs_cltpsock = (struct nfssvc_sock *)
 870             malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK);
 871         bzero((caddr_t)nfs_cltpsock, sizeof (struct nfssvc_sock));
 872         STAILQ_INIT(&nfs_cltpsock->ns_rec);
 873         TAILQ_INIT(&nfs_cltpsock->ns_uidlruhead);
 874         TAILQ_INSERT_TAIL(&nfssvc_sockhead, nfs_cltpsock, ns_chain);
 875 #endif
 876 }
 877
 878 /*
 879  * Add entries to the server monitor log.
 880  */
 881 static void
 882 nfsd_rt(int sotype, struct nfsrv_descript *nd, int cacherep)
 883 {
 884         struct drt *rt;
 885
 886         rt = &nfsdrt.drt[nfsdrt.pos];
 887         if (cacherep == RC_DOIT)
 888                 rt->flag = 0;
 889         else if (cacherep == RC_REPLY)
 890                 rt->flag = DRT_CACHEREPLY;
 891         else
 892                 rt->flag = DRT_CACHEDROP;
 893         if (sotype == SOCK_STREAM)
 894                 rt->flag |= DRT_TCP;
 895         if (nd->nd_flag & ND_NQNFS)
 896                 rt->flag |= DRT_NQNFS;
 897         else if (nd->nd_flag & ND_NFSV3)
 898                 rt->flag |= DRT_NFSV3;
 899         rt->proc = nd->nd_procnum;
 900         if (nd->nd_nam->sa_family == AF_INET)
 901             rt->ipadr = ((struct sockaddr_in *)nd->nd_nam)->sin_addr.s_addr;
 902         else
 903             rt->ipadr = INADDR_ANY;
 904         rt->resptime = nfs_curusec() - (nd->nd_starttime.tv_sec * 1000000 + nd->nd_starttime.tv_usec);
 905         getmicrotime(&rt->tstamp);
 906         nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ;
 907 }
 908 #endif /* NFS_NOSERVER */
 909
 910 static int nfs_defect = 0;
 911 SYSCTL_INT(_vfs_nfs, OID_AUTO, defect, CTLFLAG_RW, &nfs_defect, 0, "");
 912
 913 /*
 914  * Asynchronous I/O daemons for client nfs.
 915  * They do read-ahead and write-behind operations on the block I/O cache.
 916  * Never returns unless it fails or gets killed.
 917  */
 918 static int
 919 nfssvc_iod(struct thread *td)
 920 {
 921         struct bio *bio;
 922         int i, myiod;
 923         struct nfsmount *nmp;
 924         int error = 0;
 925
 926         /*
 927          * Assign my position or return error if too many already running
 928          */
 929         myiod = -1;
 930         for (i = 0; i < NFS_MAXASYNCDAEMON; i++)
 931                 if (nfs_asyncdaemon[i] == 0) {
 932                         nfs_asyncdaemon[i]++;
 933                         myiod = i;
 934                         break;
 935                 }
 936         if (myiod == -1)
 937                 return (EBUSY);
 938         nfs_numasync++;
 939         /*
 940          * Just loop around doin our stuff until SIGKILL
 941          */
 942         for (;;) {
 943             while (((nmp = nfs_iodmount[myiod]) == NULL
 944                      || TAILQ_EMPTY(&nmp->nm_bioq))
 945                    && error == 0) {
 946                 if (nmp)
 947                     nmp->nm_bioqiods--;
 948                 nfs_iodwant[myiod] = td;
 949                 nfs_iodmount[myiod] = NULL;
 950                 error = tsleep((caddr_t)&nfs_iodwant[myiod],
 951                         PCATCH, "nfsidl", 0);
 952             }
 953             if (error) {
 954                 nfs_asyncdaemon[myiod] = 0;
 955                 if (nmp)
 956                     nmp->nm_bioqiods--;
 957                 nfs_iodwant[myiod] = NULL;
 958                 nfs_iodmount[myiod] = NULL;
 959                 nfs_numasync--;
 960                 return (error);
 961             }
 962             while ((bio = TAILQ_FIRST(&nmp->nm_bioq)) != NULL) {
 963                 /*
 964                  * Take one off the front of the list.   The BIO's
 965                  * block number is normalized for DEV_BSIZE.
 966                  */
 967                 TAILQ_REMOVE(&nmp->nm_bioq, bio, bio_act);
 968                 nmp->nm_bioqlen--;
 969                 if (nmp->nm_bioqwant && nmp->nm_bioqlen <= nfs_numasync) {
 970                     nmp->nm_bioqwant = FALSE;
 971                     wakeup(&nmp->nm_bioq);
 972                 }
 973                 nfs_doio((struct vnode *)bio->bio_driver_info, bio, NULL);
 974                 /*
 975                  * If there are more than one iod on this mount, then defect
 976                  * so that the iods can be shared out fairly between the mounts
 977                  */
 978                 if (nfs_defect && nmp->nm_bioqiods > 1) {
 979                     NFS_DPF(ASYNCIO,
 980                             ("nfssvc_iod: iod %d defecting from mount %p\n",
 981                              myiod, nmp));
 982                     nfs_iodmount[myiod] = NULL;
 983                     nmp->nm_bioqiods--;
 984                     break;
 985                 }
 986             }
 987         }
 988 }
 989
 990
 991 /*
 992  * Get an authorization string for the uid by having the mount_nfs sitting
 993  * on this mount point porpous out of the kernel and do it.
 994  */
 995 int
 996 nfs_getauth(struct nfsmount *nmp, struct nfsreq *rep,
 997             struct ucred *cred, char **auth_str, int *auth_len, char *verf_str,
 998             int *verf_len, NFSKERBKEY_T key /* return session key */)
 999 {
1000         int error = 0;
1001
1002         while ((nmp->nm_state & NFSSTA_WAITAUTH) == 0) {
1003                 nmp->nm_state |= NFSSTA_WANTAUTH;
1004                 (void) tsleep((caddr_t)&nmp->nm_authtype, 0,
1005                         "nfsauth1", 2 * hz);
1006                 error = nfs_sigintr(nmp, rep, rep->r_td);
1007                 if (error) {
1008                         nmp->nm_state &= ~NFSSTA_WANTAUTH;
1009                         return (error);
1010                 }
1011         }
1012         nmp->nm_state &= ~(NFSSTA_WAITAUTH | NFSSTA_WANTAUTH);
1013         nmp->nm_authstr = *auth_str = (char *)malloc(RPCAUTH_MAXSIZ, M_TEMP, M_WAITOK);
1014         nmp->nm_authlen = RPCAUTH_MAXSIZ;
1015         nmp->nm_verfstr = verf_str;
1016         nmp->nm_verflen = *verf_len;
1017         nmp->nm_authuid = cred->cr_uid;
1018         wakeup((caddr_t)&nmp->nm_authstr);
1019
1020         /*
1021          * And wait for mount_nfs to do its stuff.
1022          */
1023         while ((nmp->nm_state & NFSSTA_HASAUTH) == 0 && error == 0) {
1024                 (void) tsleep((caddr_t)&nmp->nm_authlen, 0,
1025                         "nfsauth2", 2 * hz);
1026                 error = nfs_sigintr(nmp, rep, rep->r_td);
1027         }
1028         if (nmp->nm_state & NFSSTA_AUTHERR) {
1029                 nmp->nm_state &= ~NFSSTA_AUTHERR;
1030                 error = EAUTH;
1031         }
1032         if (error)
1033                 free((caddr_t)*auth_str, M_TEMP);
1034         else {
1035                 *auth_len = nmp->nm_authlen;
1036                 *verf_len = nmp->nm_verflen;
1037                 bcopy((caddr_t)nmp->nm_key, (caddr_t)key, sizeof (key));
1038         }
1039         nmp->nm_state &= ~NFSSTA_HASAUTH;
1040         nmp->nm_state |= NFSSTA_WAITAUTH;
1041         if (nmp->nm_state & NFSSTA_WANTAUTH) {
1042                 nmp->nm_state &= ~NFSSTA_WANTAUTH;
1043                 wakeup((caddr_t)&nmp->nm_authtype);
1044         }
1045         return (error);
1046 }
1047
1048 /*
1049  * Get a nickname authenticator and verifier.
1050  */
1051 int
1052 nfs_getnickauth(struct nfsmount *nmp, struct ucred *cred, char **auth_str,
1053                 int *auth_len, char *verf_str, int verf_len)
1054 {
1055         struct nfsuid *nuidp;
1056         u_int32_t *nickp, *verfp;
1057         struct timeval ktvin, ktvout;
1058
1059 #ifdef DIAGNOSTIC
1060         if (verf_len < (4 * NFSX_UNSIGNED))
1061                 panic("nfs_getnickauth verf too small");
1062 #endif
1063         for (nuidp = NMUIDHASH(nmp, cred->cr_uid)->lh_first;
1064             nuidp != 0; nuidp = nuidp->nu_hash.le_next) {
1065                 if (nuidp->nu_cr.cr_uid == cred->cr_uid)
1066                         break;
1067         }
1068         if (!nuidp || nuidp->nu_expire < time_second)
1069                 return (EACCES);
1070
1071         /*
1072          * Move to the end of the lru list (end of lru == most recently used).
1073          */
1074         TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru);
1075         TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, nu_lru);
1076
1077         nickp = (u_int32_t *)malloc(2 * NFSX_UNSIGNED, M_TEMP, M_WAITOK);
1078         *nickp++ = txdr_unsigned(RPCAKN_NICKNAME);
1079         *nickp = txdr_unsigned(nuidp->nu_nickname);
1080         *auth_str = (char *)nickp;
1081         *auth_len = 2 * NFSX_UNSIGNED;
1082
1083         /*
1084          * Now we must encrypt the verifier and package it up.
1085          */
1086         verfp = (u_int32_t *)verf_str;
1087         *verfp++ = txdr_unsigned(RPCAKN_NICKNAME);
1088         if (time_second > nuidp->nu_timestamp.tv_sec ||
1089             (time_second == nuidp->nu_timestamp.tv_sec &&
1090              time_second > nuidp->nu_timestamp.tv_usec))
1091                 getmicrotime(&nuidp->nu_timestamp);
1092         else
1093                 nuidp->nu_timestamp.tv_usec++;
1094         ktvin.tv_sec = txdr_unsigned(nuidp->nu_timestamp.tv_sec);
1095         ktvin.tv_usec = txdr_unsigned(nuidp->nu_timestamp.tv_usec);
1096
1097         /*
1098          * Now encrypt the timestamp verifier in ecb mode using the session
1099          * key.
1100          */
1101 #ifdef NFSKERB
1102         XXX
1103 #endif
1104
1105         *verfp++ = ktvout.tv_sec;
1106         *verfp++ = ktvout.tv_usec;
1107         *verfp = 0;
1108         return (0);
1109 }
1110
1111 /*
1112  * Save the current nickname in a hash list entry on the mount point.
1113  */
1114 int
1115 nfs_savenickauth(struct nfsmount *nmp, struct ucred *cred, int len,
1116                  NFSKERBKEY_T key, struct mbuf **mdp, char **dposp,
1117                  struct mbuf *mrep)
1118 {
1119         struct nfsuid *nuidp;
1120         u_int32_t *tl;
1121         int32_t t1;
1122         struct mbuf *md = *mdp;
1123         struct timeval ktvin, ktvout;
1124         u_int32_t nick;
1125         char *dpos = *dposp, *cp2;
1126         int deltasec, error = 0;
1127
1128         if (len == (3 * NFSX_UNSIGNED)) {
1129                 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
1130                 ktvin.tv_sec = *tl++;
1131                 ktvin.tv_usec = *tl++;
1132                 nick = fxdr_unsigned(u_int32_t, *tl);
1133
1134                 /*
1135                  * Decrypt the timestamp in ecb mode.
1136                  */
1137 #ifdef NFSKERB
1138                 XXX
1139 #endif
1140                 ktvout.tv_sec = fxdr_unsigned(long, ktvout.tv_sec);
1141                 ktvout.tv_usec = fxdr_unsigned(long, ktvout.tv_usec);
1142                 deltasec = time_second - ktvout.tv_sec;
1143                 if (deltasec < 0)
1144                         deltasec = -deltasec;
1145                 /*
1146                  * If ok, add it to the hash list for the mount point.
1147                  */
1148                 if (deltasec <= NFS_KERBCLOCKSKEW) {
1149                         if (nmp->nm_numuids < nuidhash_max) {
1150                                 nmp->nm_numuids++;
1151                                 nuidp = (struct nfsuid *)
1152                                    malloc(sizeof (struct nfsuid), M_NFSUID,
1153                                         M_WAITOK);
1154                         } else {
1155                                 nuidp = TAILQ_FIRST(&nmp->nm_uidlruhead);
1156                                 LIST_REMOVE(nuidp, nu_hash);
1157                                 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp,
1158                                         nu_lru);
1159                         }
1160                         nuidp->nu_flag = 0;
1161                         nuidp->nu_cr.cr_uid = cred->cr_uid;
1162                         nuidp->nu_expire = time_second + NFS_KERBTTL;
1163                         nuidp->nu_timestamp = ktvout;
1164                         nuidp->nu_nickname = nick;
1165                         bcopy(key, nuidp->nu_key, sizeof (key));
1166                         TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp,
1167                                 nu_lru);
1168                         LIST_INSERT_HEAD(NMUIDHASH(nmp, cred->cr_uid),
1169                                 nuidp, nu_hash);
1170                 }
1171         } else
1172                 nfsm_adv(nfsm_rndup(len));
1173 nfsmout:
1174         *mdp = md;
1175         *dposp = dpos;
1176         return (error);
1177 }