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. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  *      @(#)nfs_syscalls.c      8.5 (Berkeley) 3/30/95
  33  * $FreeBSD: src/sys/nfs/nfs_syscalls.c,v 1.58.2.1 2000/11/26 02:30:06 dillon Exp $
  34  */
  35
  36 #include <sys/param.h>
  37 #include <sys/systm.h>
  38 #include <sys/sysproto.h>
  39 #include <sys/kernel.h>
  40 #include <sys/sysctl.h>
  41 #include <sys/file.h>
  42 #include <sys/filedesc.h>
  43 #include <sys/vnode.h>
  44 #include <sys/malloc.h>
  45 #include <sys/mount.h>
  46 #include <sys/proc.h>
  47 #include <sys/priv.h>
  48 #include <sys/buf.h>
  49 #include <sys/mbuf.h>
  50 #include <sys/resourcevar.h>
  51 #include <sys/socket.h>
  52 #include <sys/socketvar.h>
  53 #include <sys/domain.h>
  54 #include <sys/protosw.h>
  55 #include <sys/nlookup.h>
  56
  57 #include <sys/mutex2.h>
  58 #include <sys/thread2.h>
  59
  60 #include <netinet/in.h>
  61 #include <netinet/tcp.h>
  62 #include "xdr_subs.h"
  63 #include "rpcv2.h"
  64 #include "nfsproto.h"
  65 #include "nfs.h"
  66 #include "nfsm_subs.h"
  67 #include "nfsrvcache.h"
  68 #include "nfsmount.h"
  69 #include "nfsnode.h"
  70 #include "nfsrtt.h"
  71
  72 static MALLOC_DEFINE(M_NFSSVC, "NFS srvsock", "Nfs server structure");
  73
  74 static int nuidhash_max = NFS_MAXUIDHASH;
  75
  76 #ifndef NFS_NOSERVER
  77 static void     nfsrv_zapsock (struct nfssvc_sock *slp);
  78 #endif
  79
  80 #define TRUE    1
  81 #define FALSE   0
  82
  83 SYSCTL_DECL(_vfs_nfs);
  84
  85 #ifndef NFS_NOSERVER
  86 int nfsd_waiting = 0;
  87 static struct nfsdrt nfsdrt;
  88 static int nfs_numnfsd = 0;
  89 static void     nfsd_rt (int sotype, struct nfsrv_descript *nd,
  90                              int cacherep);
  91 static int      nfssvc_addsock (struct file *, struct sockaddr *,
  92                                     struct thread *);
  93 static int      nfssvc_nfsd (struct nfsd_srvargs *,caddr_t,struct thread *);
  94
  95 static int nfs_privport = 0;
  96 SYSCTL_INT(_vfs_nfs, NFS_NFSPRIVPORT, nfs_privport, CTLFLAG_RW, &nfs_privport,
  97     0, "Enable privileged source port checks");
  98 SYSCTL_INT(_vfs_nfs, OID_AUTO, gatherdelay, CTLFLAG_RW, &nfsrvw_procrastinate, 0,
  99     "Enable NFS request procrastination");
 100 SYSCTL_INT(_vfs_nfs, OID_AUTO, gatherdelay_v3, CTLFLAG_RW, &nfsrvw_procrastinate_v3, 0,
 101     "Enable NFSv3 request procrastination");
 102 int     nfs_soreserve = NFS_MAXPACKET * NFS_MAXASYNCBIO;
 103 SYSCTL_INT(_vfs_nfs, OID_AUTO, soreserve, CTLFLAG_RW, &nfs_soreserve, 0,
 104     "Minimum NFS socket buffer size reservation");
 105
 106 /*
 107  * NFS server system calls
 108  */
 109
 110 #endif /* NFS_NOSERVER */
 111 /*
 112  * nfssvc_args(int flag, caddr_t argp)
 113  *
 114  * Nfs server psuedo system call for the nfsd's
 115  * Based on the flag value it either:
 116  * - adds a socket to the selection list
 117  * - remains in the kernel as an nfsd
 118  * - remains in the kernel as an nfsiod
 119  *
 120  * MPALMOSTSAFE
 121  */
 122 int
 123 sys_nfssvc(struct nfssvc_args *uap)
 124 {
 125 #ifndef NFS_NOSERVER
 126         struct nlookupdata nd;
 127         struct file *fp;
 128         struct sockaddr *nam;
 129         struct nfsd_args nfsdarg;
 130         struct nfsd_srvargs nfsd_srvargs, *nsd = &nfsd_srvargs;
 131         struct nfsd_cargs ncd;
 132         struct nfsd *nfsd;
 133         struct nfssvc_sock *slp;
 134         struct nfsuid *nuidp;
 135         struct nfsmount *nmp;
 136         struct vnode *vp;
 137 #endif /* NFS_NOSERVER */
 138         int error;
 139         struct thread *td = curthread;
 140
 141         /*
 142          * Must be super user
 143          */
 144         error = priv_check(td, PRIV_ROOT);
 145         if (error)
 146                 return (error);
 147
 148         lwkt_gettoken(&nfs_token);
 149
 150         while (nfssvc_sockhead_flag & SLP_INIT) {
 151                 nfssvc_sockhead_flag |= SLP_WANTINIT;
 152                 tsleep((caddr_t)&nfssvc_sockhead, 0, "nfsd init", 0);
 153         }
 154         if (uap->flag & NFSSVC_BIOD)
 155                 error = ENXIO;          /* no longer need nfsiod's */
 156 #ifdef NFS_NOSERVER
 157         else
 158                 error = ENXIO;
 159 #else /* !NFS_NOSERVER */
 160         else if (uap->flag & NFSSVC_MNTD) {
 161                 error = copyin(uap->argp, (caddr_t)&ncd, sizeof (ncd));
 162                 if (error)
 163                         goto done;
 164                 vp = NULL;
 165                 error = nlookup_init(&nd, ncd.ncd_dirp, UIO_USERSPACE,
 166                                         NLC_FOLLOW);
 167                 if (error == 0)
 168                         error = nlookup(&nd);
 169                 if (error == 0)
 170                         error = cache_vget(&nd.nl_nch, nd.nl_cred, LK_EXCLUSIVE, &vp);
 171                 nlookup_done(&nd);
 172                 if (error)
 173                         goto done;
 174
 175                 if ((vp->v_flag & VROOT) == 0)
 176                         error = EINVAL;
 177                 nmp = VFSTONFS(vp->v_mount);
 178                 vput(vp);
 179                 if (error)
 180                         goto done;
 181                 if ((nmp->nm_state & NFSSTA_MNTD) &&
 182                         (uap->flag & NFSSVC_GOTAUTH) == 0) {
 183                         error = 0;
 184                         goto done;
 185                 }
 186                 nmp->nm_state |= NFSSTA_MNTD;
 187                 error = nfs_clientd(nmp, td->td_ucred, &ncd, uap->flag,
 188                                     uap->argp, td);
 189         } else if (uap->flag & NFSSVC_ADDSOCK) {
 190                 error = copyin(uap->argp, (caddr_t)&nfsdarg, sizeof(nfsdarg));
 191                 if (error)
 192                         goto done;
 193                 error = holdsock(td->td_proc->p_fd, nfsdarg.sock, &fp);
 194                 if (error)
 195                         goto done;
 196                 /*
 197                  * Get the client address for connected sockets.
 198                  */
 199                 if (nfsdarg.name == NULL || nfsdarg.namelen == 0)
 200                         nam = NULL;
 201                 else {
 202                         error = getsockaddr(&nam, nfsdarg.name,
 203                                             nfsdarg.namelen);
 204                         if (error) {
 205                                 fdrop(fp);
 206                                 goto done;
 207                         }
 208                 }
 209                 error = nfssvc_addsock(fp, nam, td);
 210                 fdrop(fp);
 211         } else {
 212                 error = copyin(uap->argp, (caddr_t)nsd, sizeof (*nsd));
 213                 if (error)
 214                         goto done;
 215                 if ((uap->flag & NFSSVC_AUTHIN) &&
 216                     ((nfsd = nsd->nsd_nfsd)) != NULL &&
 217                     (nfsd->nfsd_slp->ns_flag & SLP_VALID)) {
 218                         slp = nfsd->nfsd_slp;
 219
 220                         /*
 221                          * First check to see if another nfsd has already
 222                          * added this credential.
 223                          */
 224                         for (nuidp = NUIDHASH(slp,nsd->nsd_cr.cr_uid)->lh_first;
 225                             nuidp != 0; nuidp = nuidp->nu_hash.le_next) {
 226                                 if (nuidp->nu_cr.cr_uid == nsd->nsd_cr.cr_uid &&
 227                                     (!nfsd->nfsd_nd->nd_nam2 ||
 228                                      netaddr_match(AF_INET,
 229                                      &nuidp->nu_haddr, nfsd->nfsd_nd->nd_nam2)))
 230                                         break;
 231                         }
 232                         if (nuidp) {
 233                             nfsrv_setcred(&nuidp->nu_cr,&nfsd->nfsd_nd->nd_cr);
 234                             nfsd->nfsd_nd->nd_flag |= ND_KERBFULL;
 235                         } else {
 236                             /*
 237                              * Nope, so we will.
 238                              */
 239                             if (slp->ns_numuids < nuidhash_max) {
 240                                 slp->ns_numuids++;
 241                                 nuidp = (struct nfsuid *)
 242                                    kmalloc(sizeof (struct nfsuid), M_NFSUID,
 243                                         M_WAITOK);
 244                             } else
 245                                 nuidp = NULL;
 246                             if ((slp->ns_flag & SLP_VALID) == 0) {
 247                                 if (nuidp)
 248                                     kfree((caddr_t)nuidp, M_NFSUID);
 249                             } else {
 250                                 if (nuidp == NULL) {
 251                                     nuidp = TAILQ_FIRST(&slp->ns_uidlruhead);
 252                                     LIST_REMOVE(nuidp, nu_hash);
 253                                     TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp,
 254                                         nu_lru);
 255                                     if (nuidp->nu_flag & NU_NAM)
 256                                         kfree(nuidp->nu_nam, M_SONAME);
 257                                 }
 258                                 nuidp->nu_flag = 0;
 259                                 nuidp->nu_cr = nsd->nsd_cr;
 260                                 if (nuidp->nu_cr.cr_ngroups > NGROUPS)
 261                                     nuidp->nu_cr.cr_ngroups = NGROUPS;
 262                                 nuidp->nu_cr.cr_ref = 1;
 263                                 nuidp->nu_timestamp = nsd->nsd_timestamp;
 264                                 nuidp->nu_expire = time_uptime + nsd->nsd_ttl;
 265                                 /*
 266                                  * and save the session key in nu_key.
 267                                  */
 268                                 bcopy(nsd->nsd_key, nuidp->nu_key,
 269                                     sizeof (nsd->nsd_key));
 270                                 if (nfsd->nfsd_nd->nd_nam2) {
 271                                     struct sockaddr_in *saddr;
 272
 273                                     saddr = (struct sockaddr_in *)
 274                                             nfsd->nfsd_nd->nd_nam2;
 275                                     switch (saddr->sin_family) {
 276                                     case AF_INET:
 277                                         nuidp->nu_flag |= NU_INETADDR;
 278                                         nuidp->nu_inetaddr =
 279                                              saddr->sin_addr.s_addr;
 280                                         break;
 281                                     default:
 282                                         nuidp->nu_flag |= NU_NAM;
 283                                         nuidp->nu_nam =
 284                                           dup_sockaddr(nfsd->nfsd_nd->nd_nam2);
 285                                         break;
 286                                     };
 287                                 }
 288                                 TAILQ_INSERT_TAIL(&slp->ns_uidlruhead, nuidp,
 289                                         nu_lru);
 290                                 LIST_INSERT_HEAD(NUIDHASH(slp, nsd->nsd_uid),
 291                                         nuidp, nu_hash);
 292                                 nfsrv_setcred(&nuidp->nu_cr,
 293                                     &nfsd->nfsd_nd->nd_cr);
 294                                 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL;
 295                             }
 296                         }
 297                 }
 298                 if ((uap->flag & NFSSVC_AUTHINFAIL) && (nfsd = nsd->nsd_nfsd))
 299                         nfsd->nfsd_flag |= NFSD_AUTHFAIL;
 300                 error = nfssvc_nfsd(nsd, uap->argp, td);
 301         }
 302 #endif /* NFS_NOSERVER */
 303         if (error == EINTR || error == ERESTART)
 304                 error = 0;
 305 done:
 306         lwkt_reltoken(&nfs_token);
 307         return (error);
 308 }
 309
 310 #ifndef NFS_NOSERVER
 311 /*
 312  * Adds a socket to the list for servicing by nfsds.
 313  */
 314 static int
 315 nfssvc_addsock(struct file *fp, struct sockaddr *mynam, struct thread *td)
 316 {
 317         int siz;
 318         struct nfssvc_sock *slp;
 319         struct socket *so;
 320         int error;
 321
 322         so = (struct socket *)fp->f_data;
 323 #if 0
 324         tslp = NULL;
 325         /*
 326          * Add it to the list, as required.
 327          */
 328         if (so->so_proto->pr_protocol == IPPROTO_UDP) {
 329                 tslp = nfs_udpsock;
 330                 if (tslp->ns_flag & SLP_VALID) {
 331                         if (mynam != NULL)
 332                                 kfree(mynam, M_SONAME);
 333                         return (EPERM);
 334                 }
 335         }
 336 #endif
 337         /*
 338          * Reserve buffer space in the socket.  Note that due to bugs in
 339          * Linux's delayed-ack code, serious performance degredation may
 340          * occur with linux hosts if the minimum is used.
 341          *
 342          * NFS sockets are not limited to the standard sb_max or by
 343          * resource limits.
 344          */
 345         if (so->so_type == SOCK_STREAM)
 346                 siz = NFS_MAXPACKET + sizeof (u_long);
 347         else
 348                 siz = NFS_MAXPACKET;
 349         if (siz < nfs_soreserve)
 350             siz = nfs_soreserve;
 351
 352         error = soreserve(so, siz, siz, NULL);
 353         if (error) {
 354                 if (mynam != NULL)
 355                         kfree(mynam, M_SONAME);
 356                 return (error);
 357         }
 358
 359         /*
 360          * Set protocol specific options { for now TCP only } and
 361          * reserve some space. For datagram sockets, this can get called
 362          * repeatedly for the same socket, but that isn't harmful.
 363          */
 364         if (so->so_type == SOCK_STREAM) {
 365                 struct sockopt sopt;
 366                 int val;
 367
 368                 bzero(&sopt, sizeof sopt);
 369                 sopt.sopt_level = SOL_SOCKET;
 370                 sopt.sopt_name = SO_KEEPALIVE;
 371                 sopt.sopt_val = &val;
 372                 sopt.sopt_valsize = sizeof val;
 373                 val = 1;
 374                 sosetopt(so, &sopt);
 375         }
 376         if (so->so_proto->pr_domain->dom_family == AF_INET &&
 377             so->so_proto->pr_protocol == IPPROTO_TCP) {
 378                 struct sockopt sopt;
 379                 int val;
 380
 381                 bzero(&sopt, sizeof sopt);
 382                 sopt.sopt_level = IPPROTO_TCP;
 383                 sopt.sopt_name = TCP_NODELAY;
 384                 sopt.sopt_val = &val;
 385                 sopt.sopt_valsize = sizeof val;
 386                 val = 1;
 387                 sosetopt(so, &sopt);
 388
 389                 bzero(&sopt, sizeof sopt);
 390                 sopt.sopt_level = IPPROTO_TCP;
 391                 sopt.sopt_name = TCP_FASTKEEP;
 392                 sopt.sopt_val = &val;
 393                 sopt.sopt_valsize = sizeof val;
 394                 val = 1;
 395                 sosetopt(so, &sopt);
 396         }
 397         atomic_clear_int(&so->so_rcv.ssb_flags, SSB_NOINTR);
 398         so->so_rcv.ssb_timeo = 0;
 399         atomic_clear_int(&so->so_snd.ssb_flags, SSB_NOINTR);
 400         so->so_snd.ssb_timeo = 0;
 401
 402         /*
 403          * Clear AUTOSIZE, otherwise the socket buffer could be reduced
 404          * to the point where rpc's cannot be queued using the mbuf
 405          * interface.
 406          */
 407         atomic_clear_int(&so->so_rcv.ssb_flags, SSB_AUTOSIZE);
 408         atomic_clear_int(&so->so_snd.ssb_flags, SSB_AUTOSIZE);
 409
 410         slp = kmalloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK | M_ZERO);
 411         mtx_init(&slp->ns_solock, "nfsvc");
 412         STAILQ_INIT(&slp->ns_rec);
 413         TAILQ_INIT(&slp->ns_uidlruhead);
 414         lwkt_token_init(&slp->ns_token, "nfssrv_token");
 415
 416         lwkt_gettoken(&nfs_token);
 417         nfsrv_slpref(slp);
 418         TAILQ_INSERT_TAIL(&nfssvc_sockhead, slp, ns_chain);
 419         lwkt_gettoken(&slp->ns_token);
 420
 421         slp->ns_so = so;
 422         slp->ns_nam = mynam;
 423         fhold(fp);
 424         slp->ns_fp = fp;
 425
 426         so->so_upcallarg = (caddr_t)slp;
 427         so->so_upcall = nfsrv_rcv_upcall;
 428         atomic_set_int(&so->so_rcv.ssb_flags, SSB_UPCALL);
 429         slp->ns_flag = (SLP_VALID | SLP_NEEDQ);
 430         nfsrv_wakenfsd(slp, 1);
 431
 432         lwkt_reltoken(&slp->ns_token);
 433         lwkt_reltoken(&nfs_token);
 434
 435         return (0);
 436 }
 437
 438 /*
 439  * Called by nfssvc() for nfsds. Just loops around servicing rpc requests
 440  * until it is killed by a signal.
 441  */
 442 static int
 443 nfssvc_nfsd(struct nfsd_srvargs *nsd, caddr_t argp, struct thread *td)
 444 {
 445         int siz;
 446         struct nfssvc_sock *slp;
 447         struct nfsd *nfsd = nsd->nsd_nfsd;
 448         struct nfsrv_descript *nd = NULL;
 449         struct mbuf *m, *mreq;
 450         int error, cacherep, sotype, writes_todo;
 451         int procrastinate;
 452         int slplocked;
 453         u_quad_t cur_usec;
 454
 455 #ifndef nolint
 456         cacherep = RC_DOIT;
 457         writes_todo = 0;
 458 #endif
 459         lwkt_gettoken(&nfs_token);
 460
 461         if (nfsd == NULL) {
 462                 nsd->nsd_nfsd = nfsd = (struct nfsd *)
 463                         kmalloc(sizeof (struct nfsd), M_NFSD, M_WAITOK|M_ZERO);
 464                 nfsd->nfsd_td = td;
 465                 TAILQ_INSERT_TAIL(&nfsd_head, nfsd, nfsd_chain);
 466                 nfs_numnfsd++;
 467         }
 468
 469         /*
 470          * Loop getting rpc requests until SIGKILL.
 471          */
 472         for (;;) {
 473                 if ((nfsd->nfsd_flag & NFSD_REQINPROG) == 0) {
 474                         while (nfsd->nfsd_slp == NULL &&
 475                             (nfsd_head_flag & NFSD_CHECKSLP) == 0) {
 476                                 nfsd->nfsd_flag |= NFSD_WAITING;
 477                                 nfsd_waiting++;
 478                                 error = tsleep(nfsd, PCATCH, "nfsd", 0);
 479                                 nfsd_waiting--;
 480                                 if (error && nfsd->nfsd_slp == NULL)
 481                                         goto done;
 482                         }
 483                         if (nfsd->nfsd_slp == NULL &&
 484                             (nfsd_head_flag & NFSD_CHECKSLP)) {
 485                                 TAILQ_FOREACH(slp, &nfssvc_sockhead, ns_chain) {
 486                                     if ((slp->ns_flag & SLP_ACTION_MASK) ||
 487                                         slp->ns_needq_upcall) {
 488                                             nfsrv_slpref(slp);
 489                                             nfsd->nfsd_slp = slp;
 490                                             break;
 491                                     }
 492                                 }
 493                                 if (slp == NULL)
 494                                         nfsd_head_flag &= ~NFSD_CHECKSLP;
 495                         }
 496                         if ((slp = nfsd->nfsd_slp) == NULL)
 497                                 continue;
 498
 499                         lwkt_reltoken(&nfs_token);
 500                         lwkt_gettoken(&slp->ns_token);
 501
 502                         if (slp->ns_needq_upcall) {
 503                                 slp->ns_needq_upcall = 0;
 504                                 slp->ns_flag |= SLP_NEEDQ;
 505                         }
 506
 507                         if (slp->ns_flag & SLP_VALID) {
 508                                 /*
 509                                  * We can both process additional received
 510                                  * data into new records and process existing
 511                                  * records.  This keeps the pipeline hot by
 512                                  * allowing the tcp socket to continue to
 513                                  * drain while we are processing records.
 514                                  */
 515                                 while (slp->ns_flag & (SLP_DISCONN|SLP_NEEDQ)) {
 516                                         if (slp->ns_flag & SLP_DISCONN) {
 517                                                 nfsrv_zapsock(slp);
 518                                                 break;
 519                                         }
 520                                         if (slp->ns_flag & SLP_NEEDQ) {
 521                                                 nfs_slplock(slp, 1);
 522                                                 if ((slp->ns_flag &
 523                                                      SLP_NEEDQ) == 0) {
 524                                                         nfs_slpunlock(slp);
 525                                                         continue;
 526                                                 }
 527                                                 nfsrv_rcv(slp->ns_so,
 528                                                           (caddr_t)slp,
 529                                                           M_WAITOK);
 530                                                 nfs_slpunlock(slp);
 531                                                 break;
 532                                         }
 533                                 }
 534                                 error = nfsrv_dorec(slp, nfsd, &nd);
 535                                 cur_usec = nfs_curusec();
 536                                 if (error && slp->ns_tq.lh_first &&
 537                                     slp->ns_tq.lh_first->nd_time <= cur_usec) {
 538                                         error = 0;
 539                                         cacherep = RC_DOIT;
 540                                         writes_todo = 1;
 541                                 } else {
 542                                         writes_todo = 0;
 543                                 }
 544                                 nfsd->nfsd_flag |= NFSD_REQINPROG;
 545                         } else {
 546                                 slp->ns_flag &= ~SLP_ACTION_MASK;
 547                                 error = 0;
 548                         }
 549                 } else {
 550                         error = 0;
 551                         slp = nfsd->nfsd_slp;
 552
 553                         lwkt_reltoken(&nfs_token);
 554                         lwkt_gettoken(&slp->ns_token);
 555
 556                         if (slp->ns_needq_upcall) {
 557                                 slp->ns_needq_upcall = 0;
 558                                 slp->ns_flag |= SLP_NEEDQ;
 559                         }
 560                         if (NFSRV_RECLIMIT(slp) == 0 &&
 561                             (slp->ns_flag & SLP_NEEDQ)) {
 562                                 nfs_slplock(slp, 1);
 563                                 if (NFSRV_RECLIMIT(slp) == 0 &&
 564                                     (slp->ns_flag & SLP_NEEDQ)) {
 565                                         nfsrv_rcv(slp->ns_so, (caddr_t)slp,
 566                                                   M_WAITOK);
 567                                 }
 568                                 nfs_slpunlock(slp);
 569                         }
 570                 }
 571
 572                 /*
 573                  * nfs_token not held here.  slp token is held.
 574                  */
 575                 if (error || (slp->ns_flag & SLP_VALID) == 0) {
 576                         if (nd) {
 577                                 kfree((caddr_t)nd, M_NFSRVDESC);
 578                                 nd = NULL;
 579                         }
 580                         nfsd->nfsd_flag &= ~NFSD_REQINPROG;
 581                         if (slp->ns_flag & SLP_ACTION_MASK) {
 582                                 lwkt_reltoken(&slp->ns_token);
 583                                 lwkt_gettoken(&nfs_token);
 584                         } else {
 585                                 nfsd->nfsd_slp = NULL;
 586                                 lwkt_reltoken(&slp->ns_token);
 587                                 lwkt_gettoken(&nfs_token);
 588                                 nfsrv_slpderef(slp);
 589                         }
 590                         continue;
 591                 }
 592                 sotype = slp->ns_so->so_type;
 593
 594                 /*
 595                  * Execute the NFS request - handle the server side cache
 596                  *
 597                  * nfs_token not held here.  slp token is held.
 598                  */
 599                 if (nd) {
 600                     getmicrotime(&nd->nd_starttime);
 601                     if (nd->nd_nam2)
 602                         nd->nd_nam = nd->nd_nam2;
 603                     else
 604                         nd->nd_nam = slp->ns_nam;
 605
 606                     /*
 607                      * Check to see if authorization is needed.
 608                      */
 609                     if (nfsd->nfsd_flag & NFSD_NEEDAUTH) {
 610                         nfsd->nfsd_flag &= ~NFSD_NEEDAUTH;
 611                         nsd->nsd_haddr =
 612                                 ((struct sockaddr_in *)
 613                                  nd->nd_nam)->sin_addr.s_addr;
 614                         nsd->nsd_authlen = nfsd->nfsd_authlen;
 615                         nsd->nsd_verflen = nfsd->nfsd_verflen;
 616                         if (!copyout(nfsd->nfsd_authstr,nsd->nsd_authstr,
 617                                 nfsd->nfsd_authlen) &&
 618                             !copyout(nfsd->nfsd_verfstr, nsd->nsd_verfstr,
 619                                 nfsd->nfsd_verflen) &&
 620                             !copyout((caddr_t)nsd, argp, sizeof (*nsd)))
 621                         {
 622                             lwkt_reltoken(&slp->ns_token);
 623                             return (ENEEDAUTH);
 624                         }
 625                         cacherep = RC_DROPIT;
 626                     } else {
 627                         cacherep = nfsrv_getcache(nd, slp, &mreq);
 628                     }
 629
 630                     if (nfsd->nfsd_flag & NFSD_AUTHFAIL) {
 631                         nfsd->nfsd_flag &= ~NFSD_AUTHFAIL;
 632                         nd->nd_procnum = NFSPROC_NOOP;
 633                         nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
 634                         cacherep = RC_DOIT;
 635                     } else if (nfs_privport) {
 636                         /* Check if source port is privileged */
 637                         u_short port;
 638                         struct sockaddr *nam = nd->nd_nam;
 639                         struct sockaddr_in *sin;
 640
 641                         sin = (struct sockaddr_in *)nam;
 642                         port = ntohs(sin->sin_port);
 643                         if (port >= IPPORT_RESERVED &&
 644                             nd->nd_procnum != NFSPROC_NULL) {
 645                             char addr[INET_ADDRSTRLEN];
 646
 647                             nd->nd_procnum = NFSPROC_NOOP;
 648                             nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
 649                             cacherep = RC_DOIT;
 650                             kprintf("NFS request from unprivileged port (%s:%d)\n",
 651                                     kinet_ntoa(sin->sin_addr, addr), port);
 652                         }
 653                     }
 654                 }
 655
 656                 /*
 657                  * Execute the NFS request - direct execution
 658                  *
 659                  * Loop to get all the write rpc replies that have been
 660                  * gathered together.
 661                  *
 662                  * nfs_token not held here.  slp token is held.
 663                  */
 664                 do {
 665                     switch (cacherep) {
 666                     case RC_DOIT:
 667                         if (nd && (nd->nd_flag & ND_NFSV3))
 668                             procrastinate = nfsrvw_procrastinate_v3;
 669                         else
 670                             procrastinate = nfsrvw_procrastinate;
 671                         if (writes_todo || (nd->nd_procnum == NFSPROC_WRITE &&
 672                             procrastinate > 0)
 673                         ) {
 674                             error = nfsrv_writegather(&nd, slp,
 675                                                       nfsd->nfsd_td, &mreq);
 676                         } else {
 677                             /* NOT YET lwkt_reltoken(&slp->ns_token); */
 678                             error = (*(nfsrv3_procs[nd->nd_procnum]))(nd,
 679                                                 slp, nfsd->nfsd_td, &mreq);
 680                             /* NOT YET lwkt_gettoken(&slp->ns_token); */
 681                             lwpkthreaddeferred();       /* vnlru issues */
 682                         }
 683                         if (mreq == NULL)
 684                                 break;
 685                         if (error != 0 && error != NFSERR_RETVOID) {
 686                                 if (nd->nd_procnum != NQNFSPROC_VACATED)
 687                                         nfsstats.srv_errs++;
 688                                 nfsrv_updatecache(nd, FALSE, mreq);
 689                                 if (nd->nd_nam2)
 690                                         kfree(nd->nd_nam2, M_SONAME);
 691                                 break;
 692                         }
 693                         nfsstats.srvrpccnt[nd->nd_procnum]++;
 694                         nfsrv_updatecache(nd, TRUE, mreq);
 695                         nd->nd_mrep = NULL;
 696                         /* FALL THROUGH */
 697                     case RC_REPLY:
 698                         m = mreq;
 699                         siz = 0;
 700                         while (m) {
 701                                 siz += m->m_len;
 702                                 m = m->m_next;
 703                         }
 704                         if (siz <= 0 || siz > NFS_MAXPACKET) {
 705                                 kprintf("mbuf siz=%d\n",siz);
 706                                 panic("Bad nfs svc reply");
 707                         }
 708                         m = mreq;
 709                         m->m_pkthdr.len = siz;
 710                         m->m_pkthdr.rcvif = NULL;
 711                         /*
 712                          * For stream protocols, prepend a Sun RPC
 713                          * Record Mark.
 714                          */
 715                         if (sotype == SOCK_STREAM) {
 716                                 M_PREPEND(m, NFSX_UNSIGNED, M_WAITOK);
 717                                 if (m == NULL) {
 718                                         error = ENOBUFS;
 719                                         slplocked = 0;
 720                                         goto skip;
 721                                 }
 722                                 *mtod(m, u_int32_t *) = htonl(0x80000000 | siz);
 723                         }
 724                         if ((slp->ns_flag & SLP_VALID) &&
 725                             (slp->ns_so->so_proto->pr_flags & PR_CONNREQUIRED)){
 726                                 nfs_slplock(slp, 1);
 727                                 slplocked = 1;
 728                         } else {
 729                                 slplocked = 0;
 730                         }
 731                         if (slp->ns_flag & SLP_VALID) {
 732                             error = nfs_send(slp->ns_so, nd->nd_nam2, m, NULL);
 733                         } else {
 734                             error = EPIPE;
 735                             m_freem(m);
 736                         }
 737 skip:
 738                         if (nfsrtton)
 739                                 nfsd_rt(sotype, nd, cacherep);
 740                         if (nd->nd_nam2)
 741                                 kfree(nd->nd_nam2, M_SONAME);
 742                         if (nd->nd_mrep)
 743                                 m_freem(nd->nd_mrep);
 744                         if (error == EPIPE || error == ENOBUFS)
 745                                 nfsrv_zapsock(slp);
 746                         if (slplocked)
 747                                 nfs_slpunlock(slp);
 748                         if (error == EINTR || error == ERESTART) {
 749                                 kfree((caddr_t)nd, M_NFSRVDESC);
 750                                 lwkt_reltoken(&slp->ns_token);
 751                                 lwkt_gettoken(&nfs_token);
 752                                 nfsd->nfsd_slp = NULL;
 753                                 nfsrv_slpderef(slp);
 754                                 goto done;
 755                         }
 756                         break;
 757                     case RC_DROPIT:
 758                         if (nfsrtton)
 759                                 nfsd_rt(sotype, nd, cacherep);
 760                         m_freem(nd->nd_mrep);
 761                         if (nd->nd_nam2)
 762                                 kfree(nd->nd_nam2, M_SONAME);
 763                         break;
 764                     }
 765                     if (nd) {
 766                         kfree((caddr_t)nd, M_NFSRVDESC);
 767                         nd = NULL;
 768                     }
 769
 770                     /*
 771                      * Check to see if there are outstanding writes that
 772                      * need to be serviced.
 773                      */
 774                     cur_usec = nfs_curusec();
 775                     if (slp->ns_tq.lh_first &&
 776                         slp->ns_tq.lh_first->nd_time <= cur_usec) {
 777                         cacherep = RC_DOIT;
 778                         writes_todo = 1;
 779                     } else {
 780                         writes_todo = 0;
 781                     }
 782                 } while (writes_todo);
 783
 784                 /*
 785                  * nfs_token not held here.  slp token is held.
 786                  */
 787                 if (nfsrv_dorec(slp, nfsd, &nd)) {
 788                         nfsd->nfsd_flag &= ~NFSD_REQINPROG;
 789                         if (slp->ns_flag & SLP_ACTION_MASK) {
 790                                 lwkt_reltoken(&slp->ns_token);
 791                                 lwkt_gettoken(&nfs_token);
 792                         } else {
 793                                 nfsd->nfsd_slp = NULL;
 794                                 lwkt_reltoken(&slp->ns_token);
 795                                 lwkt_gettoken(&nfs_token);
 796                                 nfsrv_slpderef(slp);
 797                         }
 798                 } else {
 799                         lwkt_reltoken(&slp->ns_token);
 800                         lwkt_gettoken(&nfs_token);
 801                 }
 802         }
 803 done:
 804         TAILQ_REMOVE(&nfsd_head, nfsd, nfsd_chain);
 805         kfree((caddr_t)nfsd, M_NFSD);
 806         nsd->nsd_nfsd = NULL;
 807         if (--nfs_numnfsd == 0)
 808                 nfsrv_init(TRUE);       /* Reinitialize everything */
 809
 810         lwkt_reltoken(&nfs_token);
 811         return (error);
 812 }
 813
 814 /*
 815  * Shut down a socket associated with an nfssvc_sock structure.
 816  * Should be called with the send lock set, if required.
 817  *
 818  * The trick here is to increment the sref at the start, so that the nfsds
 819  * will stop using it and clear ns_flag at the end so that it will not be
 820  * reassigned during cleanup.
 821  *
 822  * That said, while we shutdown() the socket here, we don't actually destroy
 823  * it until the final deref as there might be other code in the middle of
 824  * using it.
 825  */
 826 static void
 827 nfsrv_zapsock(struct nfssvc_sock *slp)
 828 {
 829         struct nfsuid *nuidp, *nnuidp;
 830         struct nfsrv_descript *nwp, *nnwp;
 831         struct socket *so;
 832         struct nfsrv_rec *rec;
 833         int wasvalid;
 834
 835         wasvalid = slp->ns_flag & SLP_VALID;
 836         slp->ns_flag &= ~SLP_ALLFLAGS;
 837         if (wasvalid && slp->ns_fp) {
 838                 so = slp->ns_so;
 839                 atomic_clear_int(&so->so_rcv.ssb_flags, SSB_UPCALL);
 840                 so->so_upcall = NULL;
 841                 so->so_upcallarg = NULL;
 842                 soshutdown(so, SHUT_RDWR);
 843                 if (slp->ns_nam) {
 844                         kfree(slp->ns_nam, M_SONAME);
 845                         slp->ns_nam = NULL;
 846                 }
 847
 848                 m_freem(slp->ns_raw);
 849                 slp->ns_raw = NULL;
 850
 851                 while ((rec = STAILQ_FIRST(&slp->ns_rec)) != NULL) {
 852                         --slp->ns_numrec;
 853                         STAILQ_REMOVE_HEAD(&slp->ns_rec, nr_link);
 854                         if (rec->nr_address)
 855                                 kfree(rec->nr_address, M_SONAME);
 856                         m_freem(rec->nr_packet);
 857                         kfree(rec, M_NFSRVDESC);
 858                 }
 859                 KKASSERT(slp->ns_numrec == 0);
 860
 861                 TAILQ_FOREACH_MUTABLE(nuidp, &slp->ns_uidlruhead, nu_lru,
 862                                       nnuidp) {
 863                         LIST_REMOVE(nuidp, nu_hash);
 864                         TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, nu_lru);
 865                         if (nuidp->nu_flag & NU_NAM)
 866                                 kfree(nuidp->nu_nam, M_SONAME);
 867                         kfree((caddr_t)nuidp, M_NFSUID);
 868                 }
 869                 crit_enter();   /* XXX doesn't do anything any more */
 870                 for (nwp = slp->ns_tq.lh_first; nwp; nwp = nnwp) {
 871                         nnwp = nwp->nd_tq.le_next;
 872                         LIST_REMOVE(nwp, nd_tq);
 873                         kfree((caddr_t)nwp, M_NFSRVDESC);
 874                 }
 875                 LIST_INIT(&slp->ns_tq);
 876                 crit_exit();
 877
 878                 nfsrv_slpderef(slp);
 879         }
 880 }
 881
 882 /*
 883  * Derefence a server socket structure. If it has no more references and
 884  * is no longer valid, you can throw it away.
 885  *
 886  * Must be holding nfs_token!
 887  */
 888 void
 889 nfsrv_slpderef(struct nfssvc_sock *slp)
 890 {
 891         struct file *fp;
 892
 893         ASSERT_LWKT_TOKEN_HELD(&nfs_token);
 894         if (slp->ns_sref == 1) {
 895                 KKASSERT((slp->ns_flag & SLP_VALID) == 0);
 896                 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain);
 897                 slp->ns_sref = 0;
 898                 fp = slp->ns_fp;
 899                 slp->ns_fp = NULL;
 900                 slp->ns_so = NULL;
 901                 if (fp)
 902                         closef(fp, NULL);
 903                 kfree((caddr_t)slp, M_NFSSVC);
 904         } else {
 905                 --slp->ns_sref;
 906         }
 907 }
 908
 909 void
 910 nfsrv_slpref(struct nfssvc_sock *slp)
 911 {
 912         ASSERT_LWKT_TOKEN_HELD(&nfs_token);
 913         ++slp->ns_sref;
 914 }
 915
 916 /*
 917  * Lock a socket against others.
 918  *
 919  * Returns 0 on failure, 1 on success.
 920  */
 921 int
 922 nfs_slplock(struct nfssvc_sock *slp, int wait)
 923 {
 924         mtx_t *mtx = &slp->ns_solock;
 925
 926         if (wait) {
 927                 mtx_lock_ex(mtx, 0, 0);
 928                 return(1);
 929         } else if (mtx_lock_ex_try(mtx) == 0) {
 930                 return(1);
 931         } else {
 932                 return(0);
 933         }
 934 }
 935
 936 /*
 937  * Unlock the stream socket for others.
 938  */
 939 void
 940 nfs_slpunlock(struct nfssvc_sock *slp)
 941 {
 942         mtx_t *mtx = &slp->ns_solock;
 943
 944         mtx_unlock(mtx);
 945 }
 946
 947 /*
 948  * Initialize the data structures for the server.
 949  * Handshake with any new nfsds starting up to avoid any chance of
 950  * corruption.
 951  */
 952 void
 953 nfsrv_init(int terminating)
 954 {
 955         struct nfssvc_sock *slp, *nslp;
 956
 957         lwkt_gettoken(&nfs_token);
 958         if (nfssvc_sockhead_flag & SLP_INIT)
 959                 panic("nfsd init");
 960         nfssvc_sockhead_flag |= SLP_INIT;
 961
 962         if (terminating) {
 963                 TAILQ_FOREACH_MUTABLE(slp, &nfssvc_sockhead, ns_chain, nslp) {
 964                         nfsrv_slpref(slp);
 965                         lwkt_gettoken(&slp->ns_token);
 966                         if (slp->ns_flag & SLP_VALID)
 967                                 nfsrv_zapsock(slp);
 968                         lwkt_reltoken(&slp->ns_token);
 969                         nfsrv_slpderef(slp);
 970                 }
 971                 nfsrv_cleancache();     /* And clear out server cache */
 972         } else {
 973                 nfs_pub.np_valid = 0;
 974         }
 975
 976         TAILQ_INIT(&nfssvc_sockhead);
 977         nfssvc_sockhead_flag &= ~SLP_INIT;
 978         if (nfssvc_sockhead_flag & SLP_WANTINIT) {
 979                 nfssvc_sockhead_flag &= ~SLP_WANTINIT;
 980                 wakeup((caddr_t)&nfssvc_sockhead);
 981         }
 982
 983         TAILQ_INIT(&nfsd_head);
 984         nfsd_head_flag &= ~NFSD_CHECKSLP;
 985
 986         lwkt_reltoken(&nfs_token);
 987
 988 #if 0
 989         nfs_udpsock = (struct nfssvc_sock *)
 990             kmalloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK | M_ZERO);
 991         mtx_init(&nfs_udpsock->ns_solock);
 992         STAILQ_INIT(&nfs_udpsock->ns_rec);
 993         TAILQ_INIT(&nfs_udpsock->ns_uidlruhead);
 994         TAILQ_INSERT_HEAD(&nfssvc_sockhead, nfs_udpsock, ns_chain);
 995
 996         nfs_cltpsock = (struct nfssvc_sock *)
 997             kmalloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK | M_ZERO);
 998         mtx_init(&nfs_cltpsock->ns_solock);
 999         STAILQ_INIT(&nfs_cltpsock->ns_rec);
1000         TAILQ_INIT(&nfs_cltpsock->ns_uidlruhead);
1001         TAILQ_INSERT_TAIL(&nfssvc_sockhead, nfs_cltpsock, ns_chain);
1002 #endif
1003 }
1004
1005 /*
1006  * Add entries to the server monitor log.
1007  */
1008 static void
1009 nfsd_rt(int sotype, struct nfsrv_descript *nd, int cacherep)
1010 {
1011         struct drt *rt;
1012
1013         rt = &nfsdrt.drt[nfsdrt.pos];
1014         if (cacherep == RC_DOIT)
1015                 rt->flag = 0;
1016         else if (cacherep == RC_REPLY)
1017                 rt->flag = DRT_CACHEREPLY;
1018         else
1019                 rt->flag = DRT_CACHEDROP;
1020         if (sotype == SOCK_STREAM)
1021                 rt->flag |= DRT_TCP;
1022         if (nd->nd_flag & ND_NFSV3)
1023                 rt->flag |= DRT_NFSV3;
1024         rt->proc = nd->nd_procnum;
1025         if (nd->nd_nam->sa_family == AF_INET)
1026             rt->ipadr = ((struct sockaddr_in *)nd->nd_nam)->sin_addr.s_addr;
1027         else
1028             rt->ipadr = INADDR_ANY;
1029         rt->resptime = nfs_curusec() - (nd->nd_starttime.tv_sec * 1000000 + nd->nd_starttime.tv_usec);
1030         getmicrotime(&rt->tstamp);
1031         nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ;
1032 }
1033 #endif /* NFS_NOSERVER */
1034
1035 /*
1036  * Get an authorization string for the uid by having the mount_nfs sitting
1037  * on this mount point porpous out of the kernel and do it.
1038  */
1039 int
1040 nfs_getauth(struct nfsmount *nmp, struct nfsreq *rep,
1041             struct ucred *cred, char **auth_str, int *auth_len, char *verf_str,
1042             int *verf_len, NFSKERBKEY_T key /* return session key */)
1043 {
1044         int error = 0;
1045
1046         while ((nmp->nm_state & NFSSTA_WAITAUTH) == 0) {
1047                 nmp->nm_state |= NFSSTA_WANTAUTH;
1048                 (void) tsleep((caddr_t)&nmp->nm_authtype, 0,
1049                         "nfsauth1", 2 * hz);
1050                 error = nfs_sigintr(nmp, rep, rep->r_td);
1051                 if (error) {
1052                         nmp->nm_state &= ~NFSSTA_WANTAUTH;
1053                         return (error);
1054                 }
1055         }
1056         nmp->nm_state &= ~(NFSSTA_WAITAUTH | NFSSTA_WANTAUTH);
1057         nmp->nm_authstr = *auth_str = (char *)kmalloc(RPCAUTH_MAXSIZ, M_TEMP, M_WAITOK);
1058         nmp->nm_authlen = RPCAUTH_MAXSIZ;
1059         nmp->nm_verfstr = verf_str;
1060         nmp->nm_verflen = *verf_len;
1061         nmp->nm_authuid = cred->cr_uid;
1062         wakeup((caddr_t)&nmp->nm_authstr);
1063
1064         /*
1065          * And wait for mount_nfs to do its stuff.
1066          */
1067         while ((nmp->nm_state & NFSSTA_HASAUTH) == 0 && error == 0) {
1068                 (void) tsleep((caddr_t)&nmp->nm_authlen, 0,
1069                         "nfsauth2", 2 * hz);
1070                 error = nfs_sigintr(nmp, rep, rep->r_td);
1071         }
1072         if (nmp->nm_state & NFSSTA_AUTHERR) {
1073                 nmp->nm_state &= ~NFSSTA_AUTHERR;
1074                 error = EAUTH;
1075         }
1076         if (error)
1077                 kfree((caddr_t)*auth_str, M_TEMP);
1078         else {
1079                 *auth_len = nmp->nm_authlen;
1080                 *verf_len = nmp->nm_verflen;
1081                 bcopy((caddr_t)nmp->nm_key, (caddr_t)key, sizeof (NFSKERBKEY_T));
1082         }
1083         nmp->nm_state &= ~NFSSTA_HASAUTH;
1084         nmp->nm_state |= NFSSTA_WAITAUTH;
1085         if (nmp->nm_state & NFSSTA_WANTAUTH) {
1086                 nmp->nm_state &= ~NFSSTA_WANTAUTH;
1087                 wakeup((caddr_t)&nmp->nm_authtype);
1088         }
1089         return (error);
1090 }
1091
1092 /*
1093  * Get a nickname authenticator and verifier.
1094  */
1095 int
1096 nfs_getnickauth(struct nfsmount *nmp, struct ucred *cred, char **auth_str,
1097                 int *auth_len, char *verf_str, int verf_len)
1098 {
1099         struct nfsuid *nuidp;
1100         u_int32_t *nickp, *verfp;
1101         struct timeval ktvout;
1102
1103 #ifdef DIAGNOSTIC
1104         if (verf_len < (4 * NFSX_UNSIGNED))
1105                 panic("nfs_getnickauth verf too small");
1106 #endif
1107         for (nuidp = NMUIDHASH(nmp, cred->cr_uid)->lh_first;
1108             nuidp != NULL; nuidp = nuidp->nu_hash.le_next) {
1109                 if (nuidp->nu_cr.cr_uid == cred->cr_uid)
1110                         break;
1111         }
1112         if (!nuidp || nuidp->nu_expire < time_uptime)
1113                 return (EACCES);
1114
1115         /*
1116          * Move to the end of the lru list (end of lru == most recently used).
1117          */
1118         TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru);
1119         TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, nu_lru);
1120
1121         nickp = (u_int32_t *)kmalloc(2 * NFSX_UNSIGNED, M_TEMP, M_WAITOK);
1122         *nickp++ = txdr_unsigned(RPCAKN_NICKNAME);
1123         *nickp = txdr_unsigned(nuidp->nu_nickname);
1124         *auth_str = (char *)nickp;
1125         *auth_len = 2 * NFSX_UNSIGNED;
1126
1127         /*
1128          * Now we must encrypt the verifier and package it up.
1129          */
1130         verfp = (u_int32_t *)verf_str;
1131         *verfp++ = txdr_unsigned(RPCAKN_NICKNAME);
1132         if (time_second != nuidp->nu_timestamp.tv_sec ||
1133             (time_second == nuidp->nu_timestamp.tv_sec &&
1134              time_second > nuidp->nu_timestamp.tv_usec))        /* XXX */
1135                 getmicrotime(&nuidp->nu_timestamp);
1136         else
1137                 nuidp->nu_timestamp.tv_usec++;
1138
1139         /*
1140          * Now encrypt the timestamp verifier in ecb mode using the session
1141          * key.
1142          */
1143 #ifdef NFSKERB
1144         XXX
1145 #else
1146         ktvout.tv_sec = 0;
1147         ktvout.tv_usec = 0;
1148 #endif
1149
1150         *verfp++ = ktvout.tv_sec;
1151         *verfp++ = ktvout.tv_usec;
1152         *verfp = 0;
1153         return (0);
1154 }
1155
1156 /*
1157  * Save the current nickname in a hash list entry on the mount point.
1158  */
1159 int
1160 nfs_savenickauth(struct nfsmount *nmp, struct ucred *cred, int len,
1161                  NFSKERBKEY_T key, struct mbuf **mdp, char **dposp,
1162                  struct mbuf *mrep)
1163 {
1164         struct nfsuid *nuidp;
1165         u_int32_t *tl;
1166         struct timeval ktvin, ktvout;
1167         u_int32_t nick;
1168         int deltasec, error = 0;
1169         struct nfsm_info info;
1170
1171         info.md = *mdp;
1172         info.dpos = *dposp;
1173         info.mrep = mrep;
1174
1175         if (len == (3 * NFSX_UNSIGNED)) {
1176                 NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED));
1177                 ktvin.tv_sec = *tl++;
1178                 ktvin.tv_usec = *tl++;
1179                 nick = fxdr_unsigned(u_int32_t, *tl);
1180
1181                 /*
1182                  * Decrypt the timestamp in ecb mode.
1183                  */
1184 #ifdef NFSKERB
1185                 XXX
1186 #else
1187                 ktvout.tv_sec = 0;
1188                 ktvout.tv_usec = 0;
1189 #endif
1190                 ktvout.tv_sec = fxdr_unsigned(long, ktvout.tv_sec);
1191                 ktvout.tv_usec = fxdr_unsigned(long, ktvout.tv_usec);
1192                 deltasec = time_second - ktvout.tv_sec;
1193                 if (deltasec < 0)
1194                         deltasec = -deltasec;
1195                 /*
1196                  * If ok, add it to the hash list for the mount point.
1197                  */
1198                 if (deltasec <= NFS_KERBCLOCKSKEW) {
1199                         if (nmp->nm_numuids < nuidhash_max) {
1200                                 nmp->nm_numuids++;
1201                                 nuidp = (struct nfsuid *)
1202                                    kmalloc(sizeof (struct nfsuid), M_NFSUID,
1203                                         M_WAITOK);
1204                         } else {
1205                                 nuidp = TAILQ_FIRST(&nmp->nm_uidlruhead);
1206                                 LIST_REMOVE(nuidp, nu_hash);
1207                                 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp,
1208                                         nu_lru);
1209                         }
1210                         nuidp->nu_flag = 0;
1211                         nuidp->nu_cr.cr_uid = cred->cr_uid;
1212                         nuidp->nu_expire = time_uptime + NFS_KERBTTL;
1213                         nuidp->nu_timestamp = ktvout;
1214                         nuidp->nu_nickname = nick;
1215                         bcopy(key, nuidp->nu_key, sizeof (NFSKERBKEY_T));
1216                         TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp,
1217                                 nu_lru);
1218                         LIST_INSERT_HEAD(NMUIDHASH(nmp, cred->cr_uid),
1219                                 nuidp, nu_hash);
1220                 }
1221         } else {
1222                 ERROROUT(nfsm_adv(&info, nfsm_rndup(len)));
1223         }
1224 nfsmout:
1225         *mdp = info.md;
1226         *dposp = info.dpos;
1227         return (error);
1228 }