nfs_syscalls.c revision 1.137.2.1
1 /* $NetBSD: nfs_syscalls.c,v 1.137.2.1 2008/10/19 22:17:59 haad Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)nfs_syscalls.c 8.5 (Berkeley) 3/30/95 35 */ 36 37 #include <sys/cdefs.h> 38 __KERNEL_RCSID(0, "$NetBSD: nfs_syscalls.c,v 1.137.2.1 2008/10/19 22:17:59 haad Exp $"); 39 40 #include "fs_nfs.h" 41 #include "opt_nfs.h" 42 #include "opt_nfsserver.h" 43 #include "opt_iso.h" 44 #include "opt_inet.h" 45 #include "opt_compat_netbsd.h" 46 47 #include <sys/param.h> 48 #include <sys/systm.h> 49 #include <sys/kernel.h> 50 #include <sys/file.h> 51 #include <sys/stat.h> 52 #include <sys/vnode.h> 53 #include <sys/mount.h> 54 #include <sys/proc.h> 55 #include <sys/uio.h> 56 #include <sys/malloc.h> 57 #include <sys/kmem.h> 58 #include <sys/buf.h> 59 #include <sys/mbuf.h> 60 #include <sys/socket.h> 61 #include <sys/socketvar.h> 62 #include <sys/signalvar.h> 63 #include <sys/domain.h> 64 #include <sys/protosw.h> 65 #include <sys/namei.h> 66 #include <sys/syslog.h> 67 #include <sys/filedesc.h> 68 #include <sys/kthread.h> 69 #include <sys/kauth.h> 70 #include <sys/syscallargs.h> 71 72 #include <netinet/in.h> 73 #include <netinet/tcp.h> 74 #ifdef ISO 75 #include <netiso/iso.h> 76 #endif 77 #include <nfs/xdr_subs.h> 78 #include <nfs/rpcv2.h> 79 #include <nfs/nfsproto.h> 80 #include <nfs/nfs.h> 81 #include <nfs/nfsm_subs.h> 82 #include <nfs/nfsrvcache.h> 83 #include <nfs/nfsmount.h> 84 #include <nfs/nfsnode.h> 85 #include <nfs/nfsrtt.h> 86 #include <nfs/nfs_var.h> 87 88 /* Global defs. */ 89 extern int32_t (*nfsrv3_procs[NFS_NPROCS]) __P((struct nfsrv_descript *, 90 struct nfssvc_sock *, 91 struct lwp *, struct mbuf **)); 92 extern int nfsrvw_procrastinate; 93 94 struct nfssvc_sock *nfs_udpsock; 95 #ifdef ISO 96 struct nfssvc_sock *nfs_cltpsock; 97 #endif 98 #ifdef INET6 99 struct nfssvc_sock *nfs_udp6sock; 100 #endif 101 int nuidhash_max = NFS_MAXUIDHASH; 102 #ifdef NFSSERVER 103 static int nfs_numnfsd = 0; 104 static struct nfsdrt nfsdrt; 105 #endif 106 107 #ifdef NFSSERVER 108 kmutex_t nfsd_lock; 109 struct nfssvc_sockhead nfssvc_sockhead; 110 kcondvar_t nfsd_initcv; 111 struct nfssvc_sockhead nfssvc_sockpending; 112 struct nfsdhead nfsd_head; 113 struct nfsdidlehead nfsd_idle_head; 114 115 int nfssvc_sockhead_flag; 116 int nfsd_head_flag; 117 #endif 118 119 #ifdef NFS 120 /* 121 * locking order: 122 * nfs_iodlist_lock -> nid_lock -> nm_lock 123 */ 124 kmutex_t nfs_iodlist_lock; 125 struct nfs_iodlist nfs_iodlist_idle; 126 struct nfs_iodlist nfs_iodlist_all; 127 int nfs_niothreads = -1; /* == "0, and has never been set" */ 128 #endif 129 130 #ifdef NFSSERVER 131 static struct nfssvc_sock *nfsrv_sockalloc __P((void)); 132 static void nfsrv_sockfree __P((struct nfssvc_sock *)); 133 static void nfsd_rt __P((int, struct nfsrv_descript *, int)); 134 #endif 135 136 /* 137 * NFS server system calls 138 */ 139 140 141 /* 142 * Nfs server pseudo system call for the nfsd's 143 * Based on the flag value it either: 144 * - adds a socket to the selection list 145 * - remains in the kernel as an nfsd 146 * - remains in the kernel as an nfsiod 147 */ 148 int 149 sys_nfssvc(struct lwp *l, const struct sys_nfssvc_args *uap, register_t *retval) 150 { 151 /* { 152 syscallarg(int) flag; 153 syscallarg(void *) argp; 154 } */ 155 int error; 156 #ifdef NFSSERVER 157 file_t *fp; 158 struct mbuf *nam; 159 struct nfsd_args nfsdarg; 160 struct nfsd_srvargs nfsd_srvargs, *nsd = &nfsd_srvargs; 161 struct nfsd *nfsd; 162 struct nfssvc_sock *slp; 163 struct nfsuid *nuidp; 164 #endif 165 166 /* 167 * Must be super user 168 */ 169 error = kauth_authorize_network(l->l_cred, KAUTH_NETWORK_NFS, 170 KAUTH_REQ_NETWORK_NFS_SVC, NULL, NULL, NULL); 171 if (error) 172 return (error); 173 174 /* Initialize NFS server / client shared data. */ 175 nfs_init(); 176 177 #ifdef NFSSERVER 178 mutex_enter(&nfsd_lock); 179 while (nfssvc_sockhead_flag & SLP_INIT) { 180 cv_wait(&nfsd_initcv, &nfsd_lock); 181 } 182 mutex_exit(&nfsd_lock); 183 #endif 184 if (SCARG(uap, flag) & NFSSVC_BIOD) { 185 #if defined(NFS) && defined(COMPAT_14) 186 error = kpause("nfsbiod", true, 0, NULL); /* dummy impl */ 187 #else 188 error = ENOSYS; 189 #endif 190 } else if (SCARG(uap, flag) & NFSSVC_MNTD) { 191 error = ENOSYS; 192 } else if (SCARG(uap, flag) & NFSSVC_ADDSOCK) { 193 #ifndef NFSSERVER 194 error = ENOSYS; 195 #else 196 error = copyin(SCARG(uap, argp), (void *)&nfsdarg, 197 sizeof(nfsdarg)); 198 if (error) 199 return (error); 200 /* getsock() will use the descriptor for us */ 201 if ((fp = fd_getfile(nfsdarg.sock)) == NULL) 202 return (EBADF); 203 if (fp->f_type != DTYPE_SOCKET) { 204 fd_putfile(nfsdarg.sock); 205 return (ENOTSOCK); 206 } 207 if (error) 208 return (error); 209 /* 210 * Get the client address for connected sockets. 211 */ 212 if (nfsdarg.name == NULL || nfsdarg.namelen == 0) 213 nam = (struct mbuf *)0; 214 else { 215 error = sockargs(&nam, nfsdarg.name, nfsdarg.namelen, 216 MT_SONAME); 217 if (error) { 218 fd_putfile(nfsdarg.sock); 219 return (error); 220 } 221 } 222 error = nfssvc_addsock(fp, nam); 223 fd_putfile(nfsdarg.sock); 224 #endif /* !NFSSERVER */ 225 } else if (SCARG(uap, flag) & NFSSVC_SETEXPORTSLIST) { 226 #ifndef NFSSERVER 227 error = ENOSYS; 228 #else 229 struct export_args *args; 230 struct mountd_exports_list mel; 231 232 error = copyin(SCARG(uap, argp), &mel, sizeof(mel)); 233 if (error != 0) 234 return error; 235 236 args = (struct export_args *)malloc(mel.mel_nexports * 237 sizeof(struct export_args), M_TEMP, M_WAITOK); 238 error = copyin(mel.mel_exports, args, mel.mel_nexports * 239 sizeof(struct export_args)); 240 if (error != 0) { 241 free(args, M_TEMP); 242 return error; 243 } 244 mel.mel_exports = args; 245 246 error = mountd_set_exports_list(&mel, l); 247 248 free(args, M_TEMP); 249 #endif /* !NFSSERVER */ 250 } else { 251 #ifndef NFSSERVER 252 error = ENOSYS; 253 #else 254 error = copyin(SCARG(uap, argp), (void *)nsd, sizeof (*nsd)); 255 if (error) 256 return (error); 257 if ((SCARG(uap, flag) & NFSSVC_AUTHIN) && 258 ((nfsd = nsd->nsd_nfsd)) != NULL && 259 (nfsd->nfsd_slp->ns_flags & SLP_VALID)) { 260 slp = nfsd->nfsd_slp; 261 262 /* 263 * First check to see if another nfsd has already 264 * added this credential. 265 */ 266 LIST_FOREACH(nuidp, NUIDHASH(slp, nsd->nsd_cr.cr_uid), 267 nu_hash) { 268 if (kauth_cred_geteuid(nuidp->nu_cr) == 269 nsd->nsd_cr.cr_uid && 270 (!nfsd->nfsd_nd->nd_nam2 || 271 netaddr_match(NU_NETFAM(nuidp), 272 &nuidp->nu_haddr, nfsd->nfsd_nd->nd_nam2))) 273 break; 274 } 275 if (nuidp) { 276 kauth_cred_hold(nuidp->nu_cr); 277 nfsd->nfsd_nd->nd_cr = nuidp->nu_cr; 278 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL; 279 } else { 280 /* 281 * Nope, so we will. 282 */ 283 if (slp->ns_numuids < nuidhash_max) { 284 slp->ns_numuids++; 285 nuidp = kmem_alloc(sizeof(*nuidp), KM_SLEEP); 286 } else 287 nuidp = (struct nfsuid *)0; 288 if ((slp->ns_flags & SLP_VALID) == 0) { 289 if (nuidp) 290 kmem_free(nuidp, sizeof(*nuidp)); 291 } else { 292 if (nuidp == (struct nfsuid *)0) { 293 nuidp = TAILQ_FIRST(&slp->ns_uidlruhead); 294 LIST_REMOVE(nuidp, nu_hash); 295 TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, 296 nu_lru); 297 if (nuidp->nu_flag & NU_NAM) 298 m_freem(nuidp->nu_nam); 299 } 300 nuidp->nu_flag = 0; 301 kauth_uucred_to_cred(nuidp->nu_cr, 302 &nsd->nsd_cr); 303 nuidp->nu_timestamp = nsd->nsd_timestamp; 304 nuidp->nu_expire = time_second + nsd->nsd_ttl; 305 /* 306 * and save the session key in nu_key. 307 */ 308 memcpy(nuidp->nu_key, nsd->nsd_key, 309 sizeof(nsd->nsd_key)); 310 if (nfsd->nfsd_nd->nd_nam2) { 311 struct sockaddr_in *saddr; 312 313 saddr = mtod(nfsd->nfsd_nd->nd_nam2, 314 struct sockaddr_in *); 315 switch (saddr->sin_family) { 316 case AF_INET: 317 nuidp->nu_flag |= NU_INETADDR; 318 nuidp->nu_inetaddr = 319 saddr->sin_addr.s_addr; 320 break; 321 #ifdef INET6 322 case AF_INET6: 323 #endif 324 #ifdef ISO 325 case AF_ISO: 326 #endif 327 nuidp->nu_flag |= NU_NAM; 328 nuidp->nu_nam = m_copym( 329 nfsd->nfsd_nd->nd_nam2, 0, 330 M_COPYALL, M_WAIT); 331 break; 332 default: 333 return EAFNOSUPPORT; 334 }; 335 } 336 TAILQ_INSERT_TAIL(&slp->ns_uidlruhead, nuidp, 337 nu_lru); 338 LIST_INSERT_HEAD(NUIDHASH(slp, nsd->nsd_uid), 339 nuidp, nu_hash); 340 kauth_cred_hold(nuidp->nu_cr); 341 nfsd->nfsd_nd->nd_cr = nuidp->nu_cr; 342 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL; 343 } 344 } 345 } 346 if ((SCARG(uap, flag) & NFSSVC_AUTHINFAIL) && 347 (nfsd = nsd->nsd_nfsd)) 348 nfsd->nfsd_flag |= NFSD_AUTHFAIL; 349 error = nfssvc_nfsd(nsd, SCARG(uap, argp), l); 350 #endif /* !NFSSERVER */ 351 } 352 if (error == EINTR || error == ERESTART) 353 error = 0; 354 return (error); 355 } 356 357 #ifdef NFSSERVER 358 MALLOC_DEFINE(M_NFSD, "NFS daemon", "Nfs server daemon structure"); 359 360 static struct nfssvc_sock * 361 nfsrv_sockalloc() 362 { 363 struct nfssvc_sock *slp; 364 365 slp = kmem_alloc(sizeof(*slp), KM_SLEEP); 366 memset(slp, 0, sizeof (struct nfssvc_sock)); 367 mutex_init(&slp->ns_lock, MUTEX_DRIVER, IPL_SOFTNET); 368 mutex_init(&slp->ns_alock, MUTEX_DRIVER, IPL_SOFTNET); 369 cv_init(&slp->ns_cv, "nfsdsock"); 370 TAILQ_INIT(&slp->ns_uidlruhead); 371 LIST_INIT(&slp->ns_tq); 372 SIMPLEQ_INIT(&slp->ns_sendq); 373 mutex_enter(&nfsd_lock); 374 TAILQ_INSERT_TAIL(&nfssvc_sockhead, slp, ns_chain); 375 mutex_exit(&nfsd_lock); 376 377 return slp; 378 } 379 380 static void 381 nfsrv_sockfree(struct nfssvc_sock *slp) 382 { 383 384 KASSERT(slp->ns_so == NULL); 385 KASSERT(slp->ns_fp == NULL); 386 KASSERT((slp->ns_flags & SLP_VALID) == 0); 387 mutex_destroy(&slp->ns_lock); 388 mutex_destroy(&slp->ns_alock); 389 cv_destroy(&slp->ns_cv); 390 kmem_free(slp, sizeof(*slp)); 391 } 392 393 /* 394 * Adds a socket to the list for servicing by nfsds. 395 */ 396 int 397 nfssvc_addsock(fp, mynam) 398 file_t *fp; 399 struct mbuf *mynam; 400 { 401 int siz; 402 struct nfssvc_sock *slp; 403 struct socket *so; 404 struct nfssvc_sock *tslp; 405 int error; 406 int val; 407 408 so = (struct socket *)fp->f_data; 409 tslp = (struct nfssvc_sock *)0; 410 /* 411 * Add it to the list, as required. 412 */ 413 if (so->so_proto->pr_protocol == IPPROTO_UDP) { 414 #ifdef INET6 415 if (so->so_proto->pr_domain->dom_family == AF_INET6) 416 tslp = nfs_udp6sock; 417 else 418 #endif 419 tslp = nfs_udpsock; 420 if (tslp->ns_flags & SLP_VALID) { 421 m_freem(mynam); 422 return (EPERM); 423 } 424 #ifdef ISO 425 } else if (so->so_proto->pr_protocol == ISOPROTO_CLTP) { 426 tslp = nfs_cltpsock; 427 if (tslp->ns_flags & SLP_VALID) { 428 m_freem(mynam); 429 return (EPERM); 430 } 431 #endif /* ISO */ 432 } 433 if (so->so_type == SOCK_STREAM) 434 siz = NFS_MAXPACKET + sizeof (u_long); 435 else 436 siz = NFS_MAXPACKET; 437 solock(so); 438 error = soreserve(so, siz, siz); 439 sounlock(so); 440 if (error) { 441 m_freem(mynam); 442 return (error); 443 } 444 445 /* 446 * Set protocol specific options { for now TCP only } and 447 * reserve some space. For datagram sockets, this can get called 448 * repeatedly for the same socket, but that isn't harmful. 449 */ 450 if (so->so_type == SOCK_STREAM) { 451 val = 1; 452 so_setsockopt(NULL, so, SOL_SOCKET, SO_KEEPALIVE, &val, 453 sizeof(val)); 454 } 455 if ((so->so_proto->pr_domain->dom_family == AF_INET 456 #ifdef INET6 457 || so->so_proto->pr_domain->dom_family == AF_INET6 458 #endif 459 ) && 460 so->so_proto->pr_protocol == IPPROTO_TCP) { 461 val = 1; 462 so_setsockopt(NULL, so, IPPROTO_TCP, TCP_NODELAY, &val, 463 sizeof(val)); 464 } 465 solock(so); 466 so->so_rcv.sb_flags &= ~SB_NOINTR; 467 so->so_rcv.sb_timeo = 0; 468 so->so_snd.sb_flags &= ~SB_NOINTR; 469 so->so_snd.sb_timeo = 0; 470 sounlock(so); 471 if (tslp) { 472 slp = tslp; 473 } else { 474 slp = nfsrv_sockalloc(); 475 } 476 slp->ns_so = so; 477 slp->ns_nam = mynam; 478 mutex_enter(&fp->f_lock); 479 fp->f_count++; 480 mutex_exit(&fp->f_lock); 481 slp->ns_fp = fp; 482 slp->ns_flags = SLP_VALID; 483 slp->ns_aflags = SLP_A_NEEDQ; 484 slp->ns_gflags = 0; 485 slp->ns_sflags = 0; 486 solock(so); 487 so->so_upcallarg = (void *)slp; 488 so->so_upcall = nfsrv_soupcall; 489 so->so_rcv.sb_flags |= SB_UPCALL; 490 sounlock(so); 491 nfsrv_wakenfsd(slp); 492 return (0); 493 } 494 495 /* 496 * Called by nfssvc() for nfsds. Just loops around servicing rpc requests 497 * until it is killed by a signal. 498 */ 499 int 500 nfssvc_nfsd(nsd, argp, l) 501 struct nfsd_srvargs *nsd; 502 void *argp; 503 struct lwp *l; 504 { 505 struct timeval tv; 506 struct mbuf *m; 507 struct nfssvc_sock *slp; 508 struct nfsd *nfsd = nsd->nsd_nfsd; 509 struct nfsrv_descript *nd = NULL; 510 struct mbuf *mreq; 511 u_quad_t cur_usec; 512 int error = 0, cacherep, siz, sotype, writes_todo; 513 struct proc *p = l->l_proc; 514 int s; 515 bool doreinit; 516 517 #ifndef nolint 518 cacherep = RC_DOIT; 519 writes_todo = 0; 520 #endif 521 uvm_lwp_hold(l); 522 if (nfsd == NULL) { 523 nsd->nsd_nfsd = nfsd = kmem_alloc(sizeof(*nfsd), KM_SLEEP); 524 memset(nfsd, 0, sizeof (struct nfsd)); 525 cv_init(&nfsd->nfsd_cv, "nfsd"); 526 nfsd->nfsd_procp = p; 527 mutex_enter(&nfsd_lock); 528 while ((nfssvc_sockhead_flag & SLP_INIT) != 0) { 529 KASSERT(nfs_numnfsd == 0); 530 cv_wait(&nfsd_initcv, &nfsd_lock); 531 } 532 TAILQ_INSERT_TAIL(&nfsd_head, nfsd, nfsd_chain); 533 nfs_numnfsd++; 534 mutex_exit(&nfsd_lock); 535 } 536 /* 537 * Loop getting rpc requests until SIGKILL. 538 */ 539 for (;;) { 540 bool dummy; 541 542 if ((curcpu()->ci_schedstate.spc_flags & SPCF_SHOULDYIELD) 543 != 0) { 544 preempt(); 545 } 546 if (nfsd->nfsd_slp == NULL) { 547 mutex_enter(&nfsd_lock); 548 while (nfsd->nfsd_slp == NULL && 549 (nfsd_head_flag & NFSD_CHECKSLP) == 0) { 550 SLIST_INSERT_HEAD(&nfsd_idle_head, nfsd, 551 nfsd_idle); 552 error = cv_wait_sig(&nfsd->nfsd_cv, &nfsd_lock); 553 if (error) { 554 slp = nfsd->nfsd_slp; 555 nfsd->nfsd_slp = NULL; 556 if (!slp) 557 SLIST_REMOVE(&nfsd_idle_head, 558 nfsd, nfsd, nfsd_idle); 559 mutex_exit(&nfsd_lock); 560 if (slp) { 561 nfsrv_wakenfsd(slp); 562 nfsrv_slpderef(slp); 563 } 564 goto done; 565 } 566 } 567 if (nfsd->nfsd_slp == NULL && 568 (nfsd_head_flag & NFSD_CHECKSLP) != 0) { 569 slp = TAILQ_FIRST(&nfssvc_sockpending); 570 if (slp) { 571 KASSERT((slp->ns_gflags & SLP_G_DOREC) 572 != 0); 573 TAILQ_REMOVE(&nfssvc_sockpending, slp, 574 ns_pending); 575 slp->ns_gflags &= ~SLP_G_DOREC; 576 slp->ns_sref++; 577 nfsd->nfsd_slp = slp; 578 } else 579 nfsd_head_flag &= ~NFSD_CHECKSLP; 580 } 581 KASSERT(nfsd->nfsd_slp == NULL || 582 nfsd->nfsd_slp->ns_sref > 0); 583 mutex_exit(&nfsd_lock); 584 if ((slp = nfsd->nfsd_slp) == NULL) 585 continue; 586 if (slp->ns_flags & SLP_VALID) { 587 bool more; 588 589 if (nfsdsock_testbits(slp, SLP_A_NEEDQ)) { 590 nfsrv_rcv(slp); 591 } 592 if (nfsdsock_testbits(slp, SLP_A_DISCONN)) { 593 nfsrv_zapsock(slp); 594 } 595 error = nfsrv_dorec(slp, nfsd, &nd, &more); 596 getmicrotime(&tv); 597 cur_usec = (u_quad_t)tv.tv_sec * 1000000 + 598 (u_quad_t)tv.tv_usec; 599 writes_todo = 0; 600 if (error) { 601 struct nfsrv_descript *nd2; 602 603 mutex_enter(&nfsd_lock); 604 nd2 = LIST_FIRST(&slp->ns_tq); 605 if (nd2 != NULL && 606 nd2->nd_time <= cur_usec) { 607 error = 0; 608 cacherep = RC_DOIT; 609 writes_todo = 1; 610 } 611 mutex_exit(&nfsd_lock); 612 } 613 if (error == 0 && more) { 614 nfsrv_wakenfsd(slp); 615 } 616 } 617 } else { 618 error = 0; 619 slp = nfsd->nfsd_slp; 620 } 621 KASSERT(slp != NULL); 622 KASSERT(nfsd->nfsd_slp == slp); 623 if (error || (slp->ns_flags & SLP_VALID) == 0) { 624 if (nd) { 625 nfsdreq_free(nd); 626 nd = NULL; 627 } 628 nfsd->nfsd_slp = NULL; 629 nfsrv_slpderef(slp); 630 continue; 631 } 632 sotype = slp->ns_so->so_type; 633 if (nd) { 634 getmicrotime(&nd->nd_starttime); 635 if (nd->nd_nam2) 636 nd->nd_nam = nd->nd_nam2; 637 else 638 nd->nd_nam = slp->ns_nam; 639 640 /* 641 * Check to see if authorization is needed. 642 */ 643 if (nfsd->nfsd_flag & NFSD_NEEDAUTH) { 644 nfsd->nfsd_flag &= ~NFSD_NEEDAUTH; 645 nsd->nsd_haddr = mtod(nd->nd_nam, 646 struct sockaddr_in *)->sin_addr.s_addr; 647 nsd->nsd_authlen = nfsd->nfsd_authlen; 648 nsd->nsd_verflen = nfsd->nfsd_verflen; 649 if (!copyout(nfsd->nfsd_authstr, 650 nsd->nsd_authstr, nfsd->nfsd_authlen) && 651 !copyout(nfsd->nfsd_verfstr, 652 nsd->nsd_verfstr, nfsd->nfsd_verflen) && 653 !copyout(nsd, argp, sizeof (*nsd))) { 654 uvm_lwp_rele(l); 655 return (ENEEDAUTH); 656 } 657 cacherep = RC_DROPIT; 658 } else 659 cacherep = nfsrv_getcache(nd, slp, &mreq); 660 661 if (nfsd->nfsd_flag & NFSD_AUTHFAIL) { 662 nfsd->nfsd_flag &= ~NFSD_AUTHFAIL; 663 nd->nd_procnum = NFSPROC_NOOP; 664 nd->nd_repstat = 665 (NFSERR_AUTHERR | AUTH_TOOWEAK); 666 cacherep = RC_DOIT; 667 } 668 } 669 670 /* 671 * Loop to get all the write rpc relies that have been 672 * gathered together. 673 */ 674 do { 675 switch (cacherep) { 676 case RC_DOIT: 677 mreq = NULL; 678 netexport_rdlock(); 679 if (writes_todo || nd == NULL || 680 (!(nd->nd_flag & ND_NFSV3) && 681 nd->nd_procnum == NFSPROC_WRITE && 682 nfsrvw_procrastinate > 0)) 683 error = nfsrv_writegather(&nd, slp, 684 l, &mreq); 685 else 686 error = 687 (*(nfsrv3_procs[nd->nd_procnum])) 688 (nd, slp, l, &mreq); 689 netexport_rdunlock(); 690 if (mreq == NULL) { 691 if (nd != NULL) { 692 if (nd->nd_nam2) 693 m_free(nd->nd_nam2); 694 } 695 break; 696 } 697 if (error) { 698 nfsstats.srv_errs++; 699 nfsrv_updatecache(nd, false, mreq); 700 if (nd->nd_nam2) 701 m_freem(nd->nd_nam2); 702 break; 703 } 704 nfsstats.srvrpccnt[nd->nd_procnum]++; 705 nfsrv_updatecache(nd, true, mreq); 706 nd->nd_mrep = (struct mbuf *)0; 707 case RC_REPLY: 708 m = mreq; 709 siz = 0; 710 while (m) { 711 siz += m->m_len; 712 m = m->m_next; 713 } 714 if (siz <= 0 || siz > NFS_MAXPACKET) { 715 printf("mbuf siz=%d\n",siz); 716 panic("Bad nfs svc reply"); 717 } 718 m = mreq; 719 m->m_pkthdr.len = siz; 720 m->m_pkthdr.rcvif = (struct ifnet *)0; 721 /* 722 * For stream protocols, prepend a Sun RPC 723 * Record Mark. 724 */ 725 if (sotype == SOCK_STREAM) { 726 M_PREPEND(m, NFSX_UNSIGNED, M_WAIT); 727 *mtod(m, u_int32_t *) = 728 htonl(0x80000000 | siz); 729 } 730 nd->nd_mreq = m; 731 if (nfsrtton) { 732 nfsd_rt(slp->ns_so->so_type, nd, 733 cacherep); 734 } 735 error = nfsdsock_sendreply(slp, nd); 736 nd = NULL; 737 if (error == EPIPE) 738 nfsrv_zapsock(slp); 739 if (error == EINTR || error == ERESTART) { 740 nfsd->nfsd_slp = NULL; 741 nfsrv_slpderef(slp); 742 goto done; 743 } 744 break; 745 case RC_DROPIT: 746 if (nfsrtton) 747 nfsd_rt(sotype, nd, cacherep); 748 m_freem(nd->nd_mrep); 749 m_freem(nd->nd_nam2); 750 break; 751 } 752 if (nd) { 753 nfsdreq_free(nd); 754 nd = NULL; 755 } 756 757 /* 758 * Check to see if there are outstanding writes that 759 * need to be serviced. 760 */ 761 getmicrotime(&tv); 762 cur_usec = (u_quad_t)tv.tv_sec * 1000000 + 763 (u_quad_t)tv.tv_usec; 764 s = splsoftclock(); 765 if (LIST_FIRST(&slp->ns_tq) && 766 LIST_FIRST(&slp->ns_tq)->nd_time <= cur_usec) { 767 cacherep = RC_DOIT; 768 writes_todo = 1; 769 } else 770 writes_todo = 0; 771 splx(s); 772 } while (writes_todo); 773 if (nfsrv_dorec(slp, nfsd, &nd, &dummy)) { 774 nfsd->nfsd_slp = NULL; 775 nfsrv_slpderef(slp); 776 } 777 } 778 done: 779 mutex_enter(&nfsd_lock); 780 TAILQ_REMOVE(&nfsd_head, nfsd, nfsd_chain); 781 doreinit = --nfs_numnfsd == 0; 782 if (doreinit) 783 nfssvc_sockhead_flag |= SLP_INIT; 784 mutex_exit(&nfsd_lock); 785 cv_destroy(&nfsd->nfsd_cv); 786 kmem_free(nfsd, sizeof(*nfsd)); 787 nsd->nsd_nfsd = NULL; 788 if (doreinit) 789 nfsrv_init(true); /* Reinitialize everything */ 790 uvm_lwp_rele(l); 791 return (error); 792 } 793 794 /* 795 * Shut down a socket associated with an nfssvc_sock structure. 796 * Should be called with the send lock set, if required. 797 * The trick here is to increment the sref at the start, so that the nfsds 798 * will stop using it and clear ns_flag at the end so that it will not be 799 * reassigned during cleanup. 800 * 801 * called at splsoftnet. 802 */ 803 void 804 nfsrv_zapsock(slp) 805 struct nfssvc_sock *slp; 806 { 807 struct nfsuid *nuidp, *nnuidp; 808 struct nfsrv_descript *nwp; 809 struct socket *so; 810 struct mbuf *m; 811 812 if (nfsdsock_drain(slp)) { 813 return; 814 } 815 mutex_enter(&nfsd_lock); 816 if (slp->ns_gflags & SLP_G_DOREC) { 817 TAILQ_REMOVE(&nfssvc_sockpending, slp, ns_pending); 818 slp->ns_gflags &= ~SLP_G_DOREC; 819 } 820 mutex_exit(&nfsd_lock); 821 822 so = slp->ns_so; 823 KASSERT(so != NULL); 824 solock(so); 825 so->so_upcall = NULL; 826 so->so_upcallarg = NULL; 827 so->so_rcv.sb_flags &= ~SB_UPCALL; 828 soshutdown(so, SHUT_RDWR); 829 sounlock(so); 830 831 if (slp->ns_nam) 832 m_free(slp->ns_nam); 833 m_freem(slp->ns_raw); 834 m = slp->ns_rec; 835 while (m != NULL) { 836 struct mbuf *n; 837 838 n = m->m_nextpkt; 839 m_freem(m); 840 m = n; 841 } 842 for (nuidp = TAILQ_FIRST(&slp->ns_uidlruhead); nuidp != 0; 843 nuidp = nnuidp) { 844 nnuidp = TAILQ_NEXT(nuidp, nu_lru); 845 LIST_REMOVE(nuidp, nu_hash); 846 TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, nu_lru); 847 if (nuidp->nu_flag & NU_NAM) 848 m_freem(nuidp->nu_nam); 849 kmem_free(nuidp, sizeof(*nuidp)); 850 } 851 mutex_enter(&nfsd_lock); 852 while ((nwp = LIST_FIRST(&slp->ns_tq)) != NULL) { 853 LIST_REMOVE(nwp, nd_tq); 854 mutex_exit(&nfsd_lock); 855 nfsdreq_free(nwp); 856 mutex_enter(&nfsd_lock); 857 } 858 mutex_exit(&nfsd_lock); 859 } 860 861 /* 862 * Derefence a server socket structure. If it has no more references and 863 * is no longer valid, you can throw it away. 864 */ 865 void 866 nfsrv_slpderef(slp) 867 struct nfssvc_sock *slp; 868 { 869 uint32_t ref; 870 871 mutex_enter(&nfsd_lock); 872 KASSERT(slp->ns_sref > 0); 873 ref = --slp->ns_sref; 874 mutex_exit(&nfsd_lock); 875 if (ref == 0 && (slp->ns_flags & SLP_VALID) == 0) { 876 file_t *fp; 877 878 mutex_enter(&nfsd_lock); 879 KASSERT((slp->ns_gflags & SLP_G_DOREC) == 0); 880 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain); 881 mutex_exit(&nfsd_lock); 882 883 fp = slp->ns_fp; 884 if (fp != NULL) { 885 slp->ns_fp = NULL; 886 KASSERT(fp != NULL); 887 KASSERT(fp->f_data == slp->ns_so); 888 KASSERT(fp->f_count > 0); 889 closef(fp); 890 slp->ns_so = NULL; 891 } 892 893 nfsrv_sockfree(slp); 894 } 895 } 896 897 /* 898 * Initialize the data structures for the server. 899 * Handshake with any new nfsds starting up to avoid any chance of 900 * corruption. 901 */ 902 void 903 nfsrv_init(terminating) 904 int terminating; 905 { 906 struct nfssvc_sock *slp; 907 908 if (!terminating) { 909 mutex_init(&nfsd_lock, MUTEX_DRIVER, IPL_SOFTNET); 910 cv_init(&nfsd_initcv, "nfsdinit"); 911 } 912 913 mutex_enter(&nfsd_lock); 914 if (!terminating && (nfssvc_sockhead_flag & SLP_INIT) != 0) 915 panic("nfsd init"); 916 nfssvc_sockhead_flag |= SLP_INIT; 917 918 if (terminating) { 919 KASSERT(SLIST_EMPTY(&nfsd_idle_head)); 920 KASSERT(TAILQ_EMPTY(&nfsd_head)); 921 while ((slp = TAILQ_FIRST(&nfssvc_sockhead)) != NULL) { 922 mutex_exit(&nfsd_lock); 923 KASSERT(slp->ns_sref == 0); 924 slp->ns_sref++; 925 nfsrv_zapsock(slp); 926 nfsrv_slpderef(slp); 927 mutex_enter(&nfsd_lock); 928 } 929 KASSERT(TAILQ_EMPTY(&nfssvc_sockpending)); 930 mutex_exit(&nfsd_lock); 931 nfsrv_cleancache(); /* And clear out server cache */ 932 } else { 933 mutex_exit(&nfsd_lock); 934 nfs_pub.np_valid = 0; 935 } 936 937 TAILQ_INIT(&nfssvc_sockhead); 938 TAILQ_INIT(&nfssvc_sockpending); 939 940 TAILQ_INIT(&nfsd_head); 941 SLIST_INIT(&nfsd_idle_head); 942 nfsd_head_flag &= ~NFSD_CHECKSLP; 943 944 nfs_udpsock = nfsrv_sockalloc(); 945 946 #ifdef INET6 947 nfs_udp6sock = nfsrv_sockalloc(); 948 #endif 949 950 #ifdef ISO 951 nfs_cltpsock = nfsrv_sockalloc(); 952 #endif 953 954 mutex_enter(&nfsd_lock); 955 nfssvc_sockhead_flag &= ~SLP_INIT; 956 cv_broadcast(&nfsd_initcv); 957 mutex_exit(&nfsd_lock); 958 } 959 960 /* 961 * Add entries to the server monitor log. 962 */ 963 static void 964 nfsd_rt(sotype, nd, cacherep) 965 int sotype; 966 struct nfsrv_descript *nd; 967 int cacherep; 968 { 969 struct timeval tv; 970 struct drt *rt; 971 972 rt = &nfsdrt.drt[nfsdrt.pos]; 973 if (cacherep == RC_DOIT) 974 rt->flag = 0; 975 else if (cacherep == RC_REPLY) 976 rt->flag = DRT_CACHEREPLY; 977 else 978 rt->flag = DRT_CACHEDROP; 979 if (sotype == SOCK_STREAM) 980 rt->flag |= DRT_TCP; 981 if (nd->nd_flag & ND_NFSV3) 982 rt->flag |= DRT_NFSV3; 983 rt->proc = nd->nd_procnum; 984 if (mtod(nd->nd_nam, struct sockaddr *)->sa_family == AF_INET) 985 rt->ipadr = mtod(nd->nd_nam, struct sockaddr_in *)->sin_addr.s_addr; 986 else 987 rt->ipadr = INADDR_ANY; 988 getmicrotime(&tv); 989 rt->resptime = ((tv.tv_sec - nd->nd_starttime.tv_sec) * 1000000) + 990 (tv.tv_usec - nd->nd_starttime.tv_usec); 991 rt->tstamp = tv; 992 nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ; 993 } 994 #endif /* NFSSERVER */ 995 996 #ifdef NFS 997 998 int nfs_defect = 0; 999 /* 1000 * Asynchronous I/O threads for client nfs. 1001 * They do read-ahead and write-behind operations on the block I/O cache. 1002 * Never returns unless it fails or gets killed. 1003 */ 1004 1005 static void 1006 nfssvc_iod(void *arg) 1007 { 1008 struct buf *bp; 1009 struct nfs_iod *myiod; 1010 struct nfsmount *nmp; 1011 1012 myiod = kmem_alloc(sizeof(*myiod), KM_SLEEP); 1013 mutex_init(&myiod->nid_lock, MUTEX_DEFAULT, IPL_NONE); 1014 cv_init(&myiod->nid_cv, "nfsiod"); 1015 myiod->nid_exiting = false; 1016 myiod->nid_mount = NULL; 1017 mutex_enter(&nfs_iodlist_lock); 1018 LIST_INSERT_HEAD(&nfs_iodlist_all, myiod, nid_all); 1019 mutex_exit(&nfs_iodlist_lock); 1020 1021 for (;;) { 1022 mutex_enter(&nfs_iodlist_lock); 1023 LIST_INSERT_HEAD(&nfs_iodlist_idle, myiod, nid_idle); 1024 mutex_exit(&nfs_iodlist_lock); 1025 1026 mutex_enter(&myiod->nid_lock); 1027 while (/*CONSTCOND*/ true) { 1028 nmp = myiod->nid_mount; 1029 if (nmp) { 1030 myiod->nid_mount = NULL; 1031 break; 1032 } 1033 if (__predict_false(myiod->nid_exiting)) { 1034 /* 1035 * drop nid_lock to preserve locking order. 1036 */ 1037 mutex_exit(&myiod->nid_lock); 1038 mutex_enter(&nfs_iodlist_lock); 1039 mutex_enter(&myiod->nid_lock); 1040 /* 1041 * recheck nid_mount because nfs_asyncio can 1042 * pick us in the meantime as we are still on 1043 * nfs_iodlist_lock. 1044 */ 1045 if (myiod->nid_mount != NULL) { 1046 mutex_exit(&nfs_iodlist_lock); 1047 continue; 1048 } 1049 LIST_REMOVE(myiod, nid_idle); 1050 mutex_exit(&nfs_iodlist_lock); 1051 goto quit; 1052 } 1053 cv_wait(&myiod->nid_cv, &myiod->nid_lock); 1054 } 1055 mutex_exit(&myiod->nid_lock); 1056 1057 mutex_enter(&nmp->nm_lock); 1058 while ((bp = TAILQ_FIRST(&nmp->nm_bufq)) != NULL) { 1059 /* Take one off the front of the list */ 1060 TAILQ_REMOVE(&nmp->nm_bufq, bp, b_freelist); 1061 nmp->nm_bufqlen--; 1062 if (nmp->nm_bufqlen < 2 * nmp->nm_bufqiods) { 1063 cv_broadcast(&nmp->nm_aiocv); 1064 } 1065 mutex_exit(&nmp->nm_lock); 1066 KERNEL_LOCK(1, curlwp); 1067 (void)nfs_doio(bp); 1068 KERNEL_UNLOCK_LAST(curlwp); 1069 mutex_enter(&nmp->nm_lock); 1070 /* 1071 * If there are more than one iod on this mount, 1072 * then defect so that the iods can be shared out 1073 * fairly between the mounts 1074 */ 1075 if (nfs_defect && nmp->nm_bufqiods > 1) { 1076 break; 1077 } 1078 } 1079 KASSERT(nmp->nm_bufqiods > 0); 1080 nmp->nm_bufqiods--; 1081 mutex_exit(&nmp->nm_lock); 1082 } 1083 quit: 1084 KASSERT(myiod->nid_mount == NULL); 1085 mutex_exit(&myiod->nid_lock); 1086 1087 cv_destroy(&myiod->nid_cv); 1088 mutex_destroy(&myiod->nid_lock); 1089 kmem_free(myiod, sizeof(*myiod)); 1090 1091 kthread_exit(0); 1092 } 1093 1094 void 1095 nfs_iodinit() 1096 { 1097 1098 mutex_init(&nfs_iodlist_lock, MUTEX_DEFAULT, IPL_NONE); 1099 LIST_INIT(&nfs_iodlist_all); 1100 LIST_INIT(&nfs_iodlist_idle); 1101 } 1102 1103 int 1104 nfs_set_niothreads(int newval) 1105 { 1106 struct nfs_iod *nid; 1107 int error = 0; 1108 int hold_count; 1109 1110 KERNEL_UNLOCK_ALL(curlwp, &hold_count); 1111 1112 mutex_enter(&nfs_iodlist_lock); 1113 /* clamp to sane range */ 1114 nfs_niothreads = max(0, min(newval, NFS_MAXASYNCDAEMON)); 1115 1116 while (nfs_numasync != nfs_niothreads && error == 0) { 1117 while (nfs_numasync < nfs_niothreads) { 1118 1119 /* 1120 * kthread_create can wait for pagedaemon and 1121 * pagedaemon can wait for nfsiod which needs to acquire 1122 * nfs_iodlist_lock. 1123 */ 1124 1125 mutex_exit(&nfs_iodlist_lock); 1126 error = kthread_create(PRI_NONE, KTHREAD_MPSAFE, NULL, 1127 nfssvc_iod, NULL, NULL, "nfsio"); 1128 mutex_enter(&nfs_iodlist_lock); 1129 if (error) { 1130 /* give up */ 1131 nfs_niothreads = nfs_numasync; 1132 break; 1133 } 1134 nfs_numasync++; 1135 } 1136 while (nfs_numasync > nfs_niothreads) { 1137 nid = LIST_FIRST(&nfs_iodlist_all); 1138 if (nid == NULL) { 1139 /* iod has not started yet. */ 1140 kpause("nfsiorm", false, hz, &nfs_iodlist_lock); 1141 continue; 1142 } 1143 LIST_REMOVE(nid, nid_all); 1144 mutex_enter(&nid->nid_lock); 1145 KASSERT(!nid->nid_exiting); 1146 nid->nid_exiting = true; 1147 cv_signal(&nid->nid_cv); 1148 mutex_exit(&nid->nid_lock); 1149 nfs_numasync--; 1150 } 1151 } 1152 mutex_exit(&nfs_iodlist_lock); 1153 1154 KERNEL_LOCK(hold_count, curlwp); 1155 return error; 1156 } 1157 1158 /* 1159 * Get an authorization string for the uid by having the mount_nfs sitting 1160 * on this mount point porpous out of the kernel and do it. 1161 */ 1162 int 1163 nfs_getauth(nmp, rep, cred, auth_str, auth_len, verf_str, verf_len, key) 1164 struct nfsmount *nmp; 1165 struct nfsreq *rep; 1166 kauth_cred_t cred; 1167 char **auth_str; 1168 int *auth_len; 1169 char *verf_str; 1170 int *verf_len; 1171 NFSKERBKEY_T key; /* return session key */ 1172 { 1173 int error = 0; 1174 1175 while ((nmp->nm_iflag & NFSMNT_WAITAUTH) == 0) { 1176 nmp->nm_iflag |= NFSMNT_WANTAUTH; 1177 (void) tsleep((void *)&nmp->nm_authtype, PSOCK, 1178 "nfsauth1", 2 * hz); 1179 error = nfs_sigintr(nmp, rep, rep->r_lwp); 1180 if (error) { 1181 nmp->nm_iflag &= ~NFSMNT_WANTAUTH; 1182 return (error); 1183 } 1184 } 1185 nmp->nm_iflag &= ~(NFSMNT_WAITAUTH | NFSMNT_WANTAUTH); 1186 nmp->nm_authstr = *auth_str = (char *)malloc(RPCAUTH_MAXSIZ, M_TEMP, M_WAITOK); 1187 nmp->nm_authlen = RPCAUTH_MAXSIZ; 1188 nmp->nm_verfstr = verf_str; 1189 nmp->nm_verflen = *verf_len; 1190 nmp->nm_authuid = kauth_cred_geteuid(cred); 1191 wakeup((void *)&nmp->nm_authstr); 1192 1193 /* 1194 * And wait for mount_nfs to do its stuff. 1195 */ 1196 while ((nmp->nm_iflag & NFSMNT_HASAUTH) == 0 && error == 0) { 1197 (void) tsleep((void *)&nmp->nm_authlen, PSOCK, 1198 "nfsauth2", 2 * hz); 1199 error = nfs_sigintr(nmp, rep, rep->r_lwp); 1200 } 1201 if (nmp->nm_iflag & NFSMNT_AUTHERR) { 1202 nmp->nm_iflag &= ~NFSMNT_AUTHERR; 1203 error = EAUTH; 1204 } 1205 if (error) 1206 free((void *)*auth_str, M_TEMP); 1207 else { 1208 *auth_len = nmp->nm_authlen; 1209 *verf_len = nmp->nm_verflen; 1210 memcpy(key, nmp->nm_key, sizeof (NFSKERBKEY_T)); 1211 } 1212 nmp->nm_iflag &= ~NFSMNT_HASAUTH; 1213 nmp->nm_iflag |= NFSMNT_WAITAUTH; 1214 if (nmp->nm_iflag & NFSMNT_WANTAUTH) { 1215 nmp->nm_iflag &= ~NFSMNT_WANTAUTH; 1216 wakeup((void *)&nmp->nm_authtype); 1217 } 1218 return (error); 1219 } 1220 1221 /* 1222 * Get a nickname authenticator and verifier. 1223 */ 1224 int 1225 nfs_getnickauth(struct nfsmount *nmp, kauth_cred_t cred, char **auth_str, 1226 int *auth_len, char *verf_str, int verf_len) 1227 { 1228 struct timeval ktvin, ktvout, tv; 1229 struct nfsuid *nuidp; 1230 u_int32_t *nickp, *verfp; 1231 1232 memset(&ktvout, 0, sizeof ktvout); /* XXX gcc */ 1233 1234 #ifdef DIAGNOSTIC 1235 if (verf_len < (4 * NFSX_UNSIGNED)) 1236 panic("nfs_getnickauth verf too small"); 1237 #endif 1238 LIST_FOREACH(nuidp, NMUIDHASH(nmp, kauth_cred_geteuid(cred)), nu_hash) { 1239 if (kauth_cred_geteuid(nuidp->nu_cr) == kauth_cred_geteuid(cred)) 1240 break; 1241 } 1242 if (!nuidp || nuidp->nu_expire < time_second) 1243 return (EACCES); 1244 1245 /* 1246 * Move to the end of the lru list (end of lru == most recently used). 1247 */ 1248 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru); 1249 TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, nu_lru); 1250 1251 nickp = (u_int32_t *)malloc(2 * NFSX_UNSIGNED, M_TEMP, M_WAITOK); 1252 *nickp++ = txdr_unsigned(RPCAKN_NICKNAME); 1253 *nickp = txdr_unsigned(nuidp->nu_nickname); 1254 *auth_str = (char *)nickp; 1255 *auth_len = 2 * NFSX_UNSIGNED; 1256 1257 /* 1258 * Now we must encrypt the verifier and package it up. 1259 */ 1260 verfp = (u_int32_t *)verf_str; 1261 *verfp++ = txdr_unsigned(RPCAKN_NICKNAME); 1262 getmicrotime(&tv); 1263 if (tv.tv_sec > nuidp->nu_timestamp.tv_sec || 1264 (tv.tv_sec == nuidp->nu_timestamp.tv_sec && 1265 tv.tv_usec > nuidp->nu_timestamp.tv_usec)) 1266 nuidp->nu_timestamp = tv; 1267 else 1268 nuidp->nu_timestamp.tv_usec++; 1269 ktvin.tv_sec = txdr_unsigned(nuidp->nu_timestamp.tv_sec); 1270 ktvin.tv_usec = txdr_unsigned(nuidp->nu_timestamp.tv_usec); 1271 1272 /* 1273 * Now encrypt the timestamp verifier in ecb mode using the session 1274 * key. 1275 */ 1276 #ifdef NFSKERB 1277 XXX 1278 #endif 1279 1280 *verfp++ = ktvout.tv_sec; 1281 *verfp++ = ktvout.tv_usec; 1282 *verfp = 0; 1283 return (0); 1284 } 1285 1286 /* 1287 * Save the current nickname in a hash list entry on the mount point. 1288 */ 1289 int 1290 nfs_savenickauth(nmp, cred, len, key, mdp, dposp, mrep) 1291 struct nfsmount *nmp; 1292 kauth_cred_t cred; 1293 int len; 1294 NFSKERBKEY_T key; 1295 struct mbuf **mdp; 1296 char **dposp; 1297 struct mbuf *mrep; 1298 { 1299 struct nfsuid *nuidp; 1300 u_int32_t *tl; 1301 int32_t t1; 1302 struct mbuf *md = *mdp; 1303 struct timeval ktvin, ktvout; 1304 u_int32_t nick; 1305 char *dpos = *dposp, *cp2; 1306 int deltasec, error = 0; 1307 1308 memset(&ktvout, 0, sizeof ktvout); /* XXX gcc */ 1309 1310 if (len == (3 * NFSX_UNSIGNED)) { 1311 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 1312 ktvin.tv_sec = *tl++; 1313 ktvin.tv_usec = *tl++; 1314 nick = fxdr_unsigned(u_int32_t, *tl); 1315 1316 /* 1317 * Decrypt the timestamp in ecb mode. 1318 */ 1319 #ifdef NFSKERB 1320 XXX 1321 #endif 1322 ktvout.tv_sec = fxdr_unsigned(long, ktvout.tv_sec); 1323 ktvout.tv_usec = fxdr_unsigned(long, ktvout.tv_usec); 1324 deltasec = time_second - ktvout.tv_sec; 1325 if (deltasec < 0) 1326 deltasec = -deltasec; 1327 /* 1328 * If ok, add it to the hash list for the mount point. 1329 */ 1330 if (deltasec <= NFS_KERBCLOCKSKEW) { 1331 if (nmp->nm_numuids < nuidhash_max) { 1332 nmp->nm_numuids++; 1333 nuidp = kmem_alloc(sizeof(*nuidp), KM_SLEEP); 1334 } else { 1335 nuidp = TAILQ_FIRST(&nmp->nm_uidlruhead); 1336 LIST_REMOVE(nuidp, nu_hash); 1337 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, 1338 nu_lru); 1339 } 1340 nuidp->nu_flag = 0; 1341 kauth_cred_seteuid(nuidp->nu_cr, kauth_cred_geteuid(cred)); 1342 nuidp->nu_expire = time_second + NFS_KERBTTL; 1343 nuidp->nu_timestamp = ktvout; 1344 nuidp->nu_nickname = nick; 1345 memcpy(nuidp->nu_key, key, sizeof (NFSKERBKEY_T)); 1346 TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, 1347 nu_lru); 1348 LIST_INSERT_HEAD(NMUIDHASH(nmp, kauth_cred_geteuid(cred)), 1349 nuidp, nu_hash); 1350 } 1351 } else 1352 nfsm_adv(nfsm_rndup(len)); 1353 nfsmout: 1354 *mdp = md; 1355 *dposp = dpos; 1356 return (error); 1357 } 1358 #endif /* NFS */ 1359
Indexes created Mon Oct 20 20:10:13 GMT 2025