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         fp->f_count++;
 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                             nd->nd_procnum = NFSPROC_NOOP;
 646                             nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
 647                             cacherep = RC_DOIT;
 648                             kprintf("NFS request from unprivileged port (%s:%d)\n",
 649                                    inet_ntoa(sin->sin_addr), port);
 650                         }
 651                     }
 652                 }
 653
 654                 /*
 655                  * Execute the NFS request - direct execution
 656                  *
 657                  * Loop to get all the write rpc replies that have been
 658                  * gathered together.
 659                  *
 660                  * nfs_token not held here.  slp token is held.
 661                  */
 662                 do {
 663                     switch (cacherep) {
 664                     case RC_DOIT:
 665                         if (nd && (nd->nd_flag & ND_NFSV3))
 666                             procrastinate = nfsrvw_procrastinate_v3;
 667                         else
 668                             procrastinate = nfsrvw_procrastinate;
 669                         if (writes_todo || (nd->nd_procnum == NFSPROC_WRITE &&
 670                             procrastinate > 0)
 671                         ) {
 672                             error = nfsrv_writegather(&nd, slp,
 673                                                       nfsd->nfsd_td, &mreq);
 674                         } else {
 675                             /* NOT YET lwkt_reltoken(&slp->ns_token); */
 676                             error = (*(nfsrv3_procs[nd->nd_procnum]))(nd,
 677                                                 slp, nfsd->nfsd_td, &mreq);
 678                             /* NOT YET lwkt_gettoken(&slp->ns_token); */
 679                             lwpkthreaddeferred();       /* vnlru issues */
 680                         }
 681                         if (mreq == NULL)
 682                                 break;
 683                         if (error != 0 && error != NFSERR_RETVOID) {
 684                                 if (nd->nd_procnum != NQNFSPROC_VACATED)
 685                                         nfsstats.srv_errs++;
 686                                 nfsrv_updatecache(nd, FALSE, mreq);
 687                                 if (nd->nd_nam2)
 688                                         kfree(nd->nd_nam2, M_SONAME);
 689                                 break;
 690                         }
 691                         nfsstats.srvrpccnt[nd->nd_procnum]++;
 692                         nfsrv_updatecache(nd, TRUE, mreq);
 693                         nd->nd_mrep = NULL;
 694                         /* FALL THROUGH */
 695                     case RC_REPLY:
 696                         m = mreq;
 697                         siz = 0;
 698                         while (m) {
 699                                 siz += m->m_len;
 700                                 m = m->m_next;
 701                         }
 702                         if (siz <= 0 || siz > NFS_MAXPACKET) {
 703                                 kprintf("mbuf siz=%d\n",siz);
 704                                 panic("Bad nfs svc reply");
 705                         }
 706                         m = mreq;
 707                         m->m_pkthdr.len = siz;
 708                         m->m_pkthdr.rcvif = NULL;
 709                         /*
 710                          * For stream protocols, prepend a Sun RPC
 711                          * Record Mark.
 712                          */
 713                         if (sotype == SOCK_STREAM) {
 714                                 M_PREPEND(m, NFSX_UNSIGNED, M_WAITOK);
 715                                 if (m == NULL) {
 716                                         error = ENOBUFS;
 717                                         slplocked = 0;
 718                                         goto skip;
 719                                 }
 720                                 *mtod(m, u_int32_t *) = htonl(0x80000000 | siz);
 721                         }
 722                         if ((slp->ns_flag & SLP_VALID) &&
 723                             (slp->ns_so->so_proto->pr_flags & PR_CONNREQUIRED)){
 724                                 nfs_slplock(slp, 1);
 725                                 slplocked = 1;
 726                         } else {
 727                                 slplocked = 0;
 728                         }
 729                         if (slp->ns_flag & SLP_VALID) {
 730                             error = nfs_send(slp->ns_so, nd->nd_nam2, m, NULL);
 731                         } else {
 732                             error = EPIPE;
 733                             m_freem(m);
 734                         }
 735 skip:
 736                         if (nfsrtton)
 737                                 nfsd_rt(sotype, nd, cacherep);
 738                         if (nd->nd_nam2)
 739                                 kfree(nd->nd_nam2, M_SONAME);
 740                         if (nd->nd_mrep)
 741                                 m_freem(nd->nd_mrep);
 742                         if (error == EPIPE || error == ENOBUFS)
 743                                 nfsrv_zapsock(slp);
 744                         if (slplocked)
 745                                 nfs_slpunlock(slp);
 746                         if (error == EINTR || error == ERESTART) {
 747                                 kfree((caddr_t)nd, M_NFSRVDESC);
 748                                 lwkt_reltoken(&slp->ns_token);
 749                                 lwkt_gettoken(&nfs_token);
 750                                 nfsd->nfsd_slp = NULL;
 751                                 nfsrv_slpderef(slp);
 752                                 goto done;
 753                         }
 754                         break;
 755                     case RC_DROPIT:
 756                         if (nfsrtton)
 757                                 nfsd_rt(sotype, nd, cacherep);
 758                         m_freem(nd->nd_mrep);
 759                         if (nd->nd_nam2)
 760                                 kfree(nd->nd_nam2, M_SONAME);
 761                         break;
 762                     }
 763                     if (nd) {
 764                         kfree((caddr_t)nd, M_NFSRVDESC);
 765                         nd = NULL;
 766                     }
 767
 768                     /*
 769                      * Check to see if there are outstanding writes that
 770                      * need to be serviced.
 771                      */
 772                     cur_usec = nfs_curusec();
 773                     if (slp->ns_tq.lh_first &&
 774                         slp->ns_tq.lh_first->nd_time <= cur_usec) {
 775                         cacherep = RC_DOIT;
 776                         writes_todo = 1;
 777                     } else {
 778                         writes_todo = 0;
 779                     }
 780                 } while (writes_todo);
 781
 782                 /*
 783                  * nfs_token not held here.  slp token is held.
 784                  */
 785                 if (nfsrv_dorec(slp, nfsd, &nd)) {
 786                         nfsd->nfsd_flag &= ~NFSD_REQINPROG;
 787                         if (slp->ns_flag & SLP_ACTION_MASK) {
 788                                 lwkt_reltoken(&slp->ns_token);
 789                                 lwkt_gettoken(&nfs_token);
 790                         } else {
 791                                 nfsd->nfsd_slp = NULL;
 792                                 lwkt_reltoken(&slp->ns_token);
 793                                 lwkt_gettoken(&nfs_token);
 794                                 nfsrv_slpderef(slp);
 795                         }
 796                 } else {
 797                         lwkt_reltoken(&slp->ns_token);
 798                         lwkt_gettoken(&nfs_token);
 799                 }
 800         }
 801 done:
 802         TAILQ_REMOVE(&nfsd_head, nfsd, nfsd_chain);
 803         kfree((caddr_t)nfsd, M_NFSD);
 804         nsd->nsd_nfsd = NULL;
 805         if (--nfs_numnfsd == 0)
 806                 nfsrv_init(TRUE);       /* Reinitialize everything */
 807
 808         lwkt_reltoken(&nfs_token);
 809         return (error);
 810 }
 811
 812 /*
 813  * Shut down a socket associated with an nfssvc_sock structure.
 814  * Should be called with the send lock set, if required.
 815  *
 816  * The trick here is to increment the sref at the start, so that the nfsds
 817  * will stop using it and clear ns_flag at the end so that it will not be
 818  * reassigned during cleanup.
 819  *
 820  * That said, while we shutdown() the socket here, we don't actually destroy
 821  * it until the final deref as there might be other code in the middle of
 822  * using it.
 823  */
 824 static void
 825 nfsrv_zapsock(struct nfssvc_sock *slp)
 826 {
 827         struct nfsuid *nuidp, *nnuidp;
 828         struct nfsrv_descript *nwp, *nnwp;
 829         struct socket *so;
 830         struct nfsrv_rec *rec;
 831         int wasvalid;
 832
 833         wasvalid = slp->ns_flag & SLP_VALID;
 834         slp->ns_flag &= ~SLP_ALLFLAGS;
 835         if (wasvalid && slp->ns_fp) {
 836                 so = slp->ns_so;
 837                 atomic_clear_int(&so->so_rcv.ssb_flags, SSB_UPCALL);
 838                 so->so_upcall = NULL;
 839                 so->so_upcallarg = NULL;
 840                 soshutdown(so, SHUT_RDWR);
 841                 if (slp->ns_nam) {
 842                         kfree(slp->ns_nam, M_SONAME);
 843                         slp->ns_nam = NULL;
 844                 }
 845
 846                 m_freem(slp->ns_raw);
 847                 slp->ns_raw = NULL;
 848
 849                 while ((rec = STAILQ_FIRST(&slp->ns_rec)) != NULL) {
 850                         --slp->ns_numrec;
 851                         STAILQ_REMOVE_HEAD(&slp->ns_rec, nr_link);
 852                         if (rec->nr_address)
 853                                 kfree(rec->nr_address, M_SONAME);
 854                         m_freem(rec->nr_packet);
 855                         kfree(rec, M_NFSRVDESC);
 856                 }
 857                 KKASSERT(slp->ns_numrec == 0);
 858
 859                 TAILQ_FOREACH_MUTABLE(nuidp, &slp->ns_uidlruhead, nu_lru,
 860                                       nnuidp) {
 861                         LIST_REMOVE(nuidp, nu_hash);
 862                         TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, nu_lru);
 863                         if (nuidp->nu_flag & NU_NAM)
 864                                 kfree(nuidp->nu_nam, M_SONAME);
 865                         kfree((caddr_t)nuidp, M_NFSUID);
 866                 }
 867                 crit_enter();   /* XXX doesn't do anything any more */
 868                 for (nwp = slp->ns_tq.lh_first; nwp; nwp = nnwp) {
 869                         nnwp = nwp->nd_tq.le_next;
 870                         LIST_REMOVE(nwp, nd_tq);
 871                         kfree((caddr_t)nwp, M_NFSRVDESC);
 872                 }
 873                 LIST_INIT(&slp->ns_tq);
 874                 crit_exit();
 875
 876                 nfsrv_slpderef(slp);
 877         }
 878 }
 879
 880 /*
 881  * Derefence a server socket structure. If it has no more references and
 882  * is no longer valid, you can throw it away.
 883  *
 884  * Must be holding nfs_token!
 885  */
 886 void
 887 nfsrv_slpderef(struct nfssvc_sock *slp)
 888 {
 889         struct file *fp;
 890
 891         ASSERT_LWKT_TOKEN_HELD(&nfs_token);
 892         if (slp->ns_sref == 1) {
 893                 KKASSERT((slp->ns_flag & SLP_VALID) == 0);
 894                 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain);
 895                 slp->ns_sref = 0;
 896                 fp = slp->ns_fp;
 897                 slp->ns_fp = NULL;
 898                 slp->ns_so = NULL;
 899                 if (fp)
 900                         closef(fp, NULL);
 901                 kfree((caddr_t)slp, M_NFSSVC);
 902         } else {
 903                 --slp->ns_sref;
 904         }
 905 }
 906
 907 void
 908 nfsrv_slpref(struct nfssvc_sock *slp)
 909 {
 910         ASSERT_LWKT_TOKEN_HELD(&nfs_token);
 911         ++slp->ns_sref;
 912 }
 913
 914 /*
 915  * Lock a socket against others.
 916  *
 917  * Returns 0 on failure, 1 on success.
 918  */
 919 int
 920 nfs_slplock(struct nfssvc_sock *slp, int wait)
 921 {
 922         mtx_t *mtx = &slp->ns_solock;
 923
 924         if (wait) {
 925                 mtx_lock_ex(mtx, 0, 0);
 926                 return(1);
 927         } else if (mtx_lock_ex_try(mtx) == 0) {
 928                 return(1);
 929         } else {
 930                 return(0);
 931         }
 932 }
 933
 934 /*
 935  * Unlock the stream socket for others.
 936  */
 937 void
 938 nfs_slpunlock(struct nfssvc_sock *slp)
 939 {
 940         mtx_t *mtx = &slp->ns_solock;
 941
 942         mtx_unlock(mtx);
 943 }
 944
 945 /*
 946  * Initialize the data structures for the server.
 947  * Handshake with any new nfsds starting up to avoid any chance of
 948  * corruption.
 949  */
 950 void
 951 nfsrv_init(int terminating)
 952 {
 953         struct nfssvc_sock *slp, *nslp;
 954
 955         lwkt_gettoken(&nfs_token);
 956         if (nfssvc_sockhead_flag & SLP_INIT)
 957                 panic("nfsd init");
 958         nfssvc_sockhead_flag |= SLP_INIT;
 959
 960         if (terminating) {
 961                 TAILQ_FOREACH_MUTABLE(slp, &nfssvc_sockhead, ns_chain, nslp) {
 962                         nfsrv_slpref(slp);
 963                         lwkt_gettoken(&slp->ns_token);
 964                         if (slp->ns_flag & SLP_VALID)
 965                                 nfsrv_zapsock(slp);
 966                         lwkt_reltoken(&slp->ns_token);
 967                         nfsrv_slpderef(slp);
 968                 }
 969                 nfsrv_cleancache();     /* And clear out server cache */
 970         } else {
 971                 nfs_pub.np_valid = 0;
 972         }
 973
 974         TAILQ_INIT(&nfssvc_sockhead);
 975         nfssvc_sockhead_flag &= ~SLP_INIT;
 976         if (nfssvc_sockhead_flag & SLP_WANTINIT) {
 977                 nfssvc_sockhead_flag &= ~SLP_WANTINIT;
 978                 wakeup((caddr_t)&nfssvc_sockhead);
 979         }
 980
 981         TAILQ_INIT(&nfsd_head);
 982         nfsd_head_flag &= ~NFSD_CHECKSLP;
 983
 984         lwkt_reltoken(&nfs_token);
 985
 986 #if 0
 987         nfs_udpsock = (struct nfssvc_sock *)
 988             kmalloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK | M_ZERO);
 989         mtx_init(&nfs_udpsock->ns_solock);
 990         STAILQ_INIT(&nfs_udpsock->ns_rec);
 991         TAILQ_INIT(&nfs_udpsock->ns_uidlruhead);
 992         TAILQ_INSERT_HEAD(&nfssvc_sockhead, nfs_udpsock, ns_chain);
 993
 994         nfs_cltpsock = (struct nfssvc_sock *)
 995             kmalloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK | M_ZERO);
 996         mtx_init(&nfs_cltpsock->ns_solock);
 997         STAILQ_INIT(&nfs_cltpsock->ns_rec);
 998         TAILQ_INIT(&nfs_cltpsock->ns_uidlruhead);
 999         TAILQ_INSERT_TAIL(&nfssvc_sockhead, nfs_cltpsock, ns_chain);
1000 #endif
1001 }
1002
1003 /*
1004  * Add entries to the server monitor log.
1005  */
1006 static void
1007 nfsd_rt(int sotype, struct nfsrv_descript *nd, int cacherep)
1008 {
1009         struct drt *rt;
1010
1011         rt = &nfsdrt.drt[nfsdrt.pos];
1012         if (cacherep == RC_DOIT)
1013                 rt->flag = 0;
1014         else if (cacherep == RC_REPLY)
1015                 rt->flag = DRT_CACHEREPLY;
1016         else
1017                 rt->flag = DRT_CACHEDROP;
1018         if (sotype == SOCK_STREAM)
1019                 rt->flag |= DRT_TCP;
1020         if (nd->nd_flag & ND_NFSV3)
1021                 rt->flag |= DRT_NFSV3;
1022         rt->proc = nd->nd_procnum;
1023         if (nd->nd_nam->sa_family == AF_INET)
1024             rt->ipadr = ((struct sockaddr_in *)nd->nd_nam)->sin_addr.s_addr;
1025         else
1026             rt->ipadr = INADDR_ANY;
1027         rt->resptime = nfs_curusec() - (nd->nd_starttime.tv_sec * 1000000 + nd->nd_starttime.tv_usec);
1028         getmicrotime(&rt->tstamp);
1029         nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ;
1030 }
1031 #endif /* NFS_NOSERVER */
1032
1033 /*
1034  * Get an authorization string for the uid by having the mount_nfs sitting
1035  * on this mount point porpous out of the kernel and do it.
1036  */
1037 int
1038 nfs_getauth(struct nfsmount *nmp, struct nfsreq *rep,
1039             struct ucred *cred, char **auth_str, int *auth_len, char *verf_str,
1040             int *verf_len, NFSKERBKEY_T key /* return session key */)
1041 {
1042         int error = 0;
1043
1044         while ((nmp->nm_state & NFSSTA_WAITAUTH) == 0) {
1045                 nmp->nm_state |= NFSSTA_WANTAUTH;
1046                 (void) tsleep((caddr_t)&nmp->nm_authtype, 0,
1047                         "nfsauth1", 2 * hz);
1048                 error = nfs_sigintr(nmp, rep, rep->r_td);
1049                 if (error) {
1050                         nmp->nm_state &= ~NFSSTA_WANTAUTH;
1051                         return (error);
1052                 }
1053         }
1054         nmp->nm_state &= ~(NFSSTA_WAITAUTH | NFSSTA_WANTAUTH);
1055         nmp->nm_authstr = *auth_str = (char *)kmalloc(RPCAUTH_MAXSIZ, M_TEMP, M_WAITOK);
1056         nmp->nm_authlen = RPCAUTH_MAXSIZ;
1057         nmp->nm_verfstr = verf_str;
1058         nmp->nm_verflen = *verf_len;
1059         nmp->nm_authuid = cred->cr_uid;
1060         wakeup((caddr_t)&nmp->nm_authstr);
1061
1062         /*
1063          * And wait for mount_nfs to do its stuff.
1064          */
1065         while ((nmp->nm_state & NFSSTA_HASAUTH) == 0 && error == 0) {
1066                 (void) tsleep((caddr_t)&nmp->nm_authlen, 0,
1067                         "nfsauth2", 2 * hz);
1068                 error = nfs_sigintr(nmp, rep, rep->r_td);
1069         }
1070         if (nmp->nm_state & NFSSTA_AUTHERR) {
1071                 nmp->nm_state &= ~NFSSTA_AUTHERR;
1072                 error = EAUTH;
1073         }
1074         if (error)
1075                 kfree((caddr_t)*auth_str, M_TEMP);
1076         else {
1077                 *auth_len = nmp->nm_authlen;
1078                 *verf_len = nmp->nm_verflen;
1079                 bcopy((caddr_t)nmp->nm_key, (caddr_t)key, sizeof (NFSKERBKEY_T));
1080         }
1081         nmp->nm_state &= ~NFSSTA_HASAUTH;
1082         nmp->nm_state |= NFSSTA_WAITAUTH;
1083         if (nmp->nm_state & NFSSTA_WANTAUTH) {
1084                 nmp->nm_state &= ~NFSSTA_WANTAUTH;
1085                 wakeup((caddr_t)&nmp->nm_authtype);
1086         }
1087         return (error);
1088 }
1089
1090 /*
1091  * Get a nickname authenticator and verifier.
1092  */
1093 int
1094 nfs_getnickauth(struct nfsmount *nmp, struct ucred *cred, char **auth_str,
1095                 int *auth_len, char *verf_str, int verf_len)
1096 {
1097         struct nfsuid *nuidp;
1098         u_int32_t *nickp, *verfp;
1099         struct timeval ktvout;
1100
1101 #ifdef DIAGNOSTIC
1102         if (verf_len < (4 * NFSX_UNSIGNED))
1103                 panic("nfs_getnickauth verf too small");
1104 #endif
1105         for (nuidp = NMUIDHASH(nmp, cred->cr_uid)->lh_first;
1106             nuidp != NULL; nuidp = nuidp->nu_hash.le_next) {
1107                 if (nuidp->nu_cr.cr_uid == cred->cr_uid)
1108                         break;
1109         }
1110         if (!nuidp || nuidp->nu_expire < time_uptime)
1111                 return (EACCES);
1112
1113         /*
1114          * Move to the end of the lru list (end of lru == most recently used).
1115          */
1116         TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru);
1117         TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, nu_lru);
1118
1119         nickp = (u_int32_t *)kmalloc(2 * NFSX_UNSIGNED, M_TEMP, M_WAITOK);
1120         *nickp++ = txdr_unsigned(RPCAKN_NICKNAME);
1121         *nickp = txdr_unsigned(nuidp->nu_nickname);
1122         *auth_str = (char *)nickp;
1123         *auth_len = 2 * NFSX_UNSIGNED;
1124
1125         /*
1126          * Now we must encrypt the verifier and package it up.
1127          */
1128         verfp = (u_int32_t *)verf_str;
1129         *verfp++ = txdr_unsigned(RPCAKN_NICKNAME);
1130         if (time_second != nuidp->nu_timestamp.tv_sec ||
1131             (time_second == nuidp->nu_timestamp.tv_sec &&
1132              time_second > nuidp->nu_timestamp.tv_usec))        /* XXX */
1133                 getmicrotime(&nuidp->nu_timestamp);
1134         else
1135                 nuidp->nu_timestamp.tv_usec++;
1136
1137         /*
1138          * Now encrypt the timestamp verifier in ecb mode using the session
1139          * key.
1140          */
1141 #ifdef NFSKERB
1142         XXX
1143 #else
1144         ktvout.tv_sec = 0;
1145         ktvout.tv_usec = 0;
1146 #endif
1147
1148         *verfp++ = ktvout.tv_sec;
1149         *verfp++ = ktvout.tv_usec;
1150         *verfp = 0;
1151         return (0);
1152 }
1153
1154 /*
1155  * Save the current nickname in a hash list entry on the mount point.
1156  */
1157 int
1158 nfs_savenickauth(struct nfsmount *nmp, struct ucred *cred, int len,
1159                  NFSKERBKEY_T key, struct mbuf **mdp, char **dposp,
1160                  struct mbuf *mrep)
1161 {
1162         struct nfsuid *nuidp;
1163         u_int32_t *tl;
1164         struct timeval ktvin, ktvout;
1165         u_int32_t nick;
1166         int deltasec, error = 0;
1167         struct nfsm_info info;
1168
1169         info.md = *mdp;
1170         info.dpos = *dposp;
1171         info.mrep = mrep;
1172
1173         if (len == (3 * NFSX_UNSIGNED)) {
1174                 NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED));
1175                 ktvin.tv_sec = *tl++;
1176                 ktvin.tv_usec = *tl++;
1177                 nick = fxdr_unsigned(u_int32_t, *tl);
1178
1179                 /*
1180                  * Decrypt the timestamp in ecb mode.
1181                  */
1182 #ifdef NFSKERB
1183                 XXX
1184 #else
1185                 ktvout.tv_sec = 0;
1186                 ktvout.tv_usec = 0;
1187 #endif
1188                 ktvout.tv_sec = fxdr_unsigned(long, ktvout.tv_sec);
1189                 ktvout.tv_usec = fxdr_unsigned(long, ktvout.tv_usec);
1190                 deltasec = time_second - ktvout.tv_sec;
1191                 if (deltasec < 0)
1192                         deltasec = -deltasec;
1193                 /*
1194                  * If ok, add it to the hash list for the mount point.
1195                  */
1196                 if (deltasec <= NFS_KERBCLOCKSKEW) {
1197                         if (nmp->nm_numuids < nuidhash_max) {
1198                                 nmp->nm_numuids++;
1199                                 nuidp = (struct nfsuid *)
1200                                    kmalloc(sizeof (struct nfsuid), M_NFSUID,
1201                                         M_WAITOK);
1202                         } else {
1203                                 nuidp = TAILQ_FIRST(&nmp->nm_uidlruhead);
1204                                 LIST_REMOVE(nuidp, nu_hash);
1205                                 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp,
1206                                         nu_lru);
1207                         }
1208                         nuidp->nu_flag = 0;
1209                         nuidp->nu_cr.cr_uid = cred->cr_uid;
1210                         nuidp->nu_expire = time_uptime + NFS_KERBTTL;
1211                         nuidp->nu_timestamp = ktvout;
1212                         nuidp->nu_nickname = nick;
1213                         bcopy(key, nuidp->nu_key, sizeof (NFSKERBKEY_T));
1214                         TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp,
1215                                 nu_lru);
1216                         LIST_INSERT_HEAD(NMUIDHASH(nmp, cred->cr_uid),
1217                                 nuidp, nu_hash);
1218                 }
1219         } else {
1220                 ERROROUT(nfsm_adv(&info, nfsm_rndup(len)));
1221         }
1222 nfsmout:
1223         *mdp = info.md;
1224         *dposp = info.dpos;
1225         return (error);
1226 }