nfs_syscalls.c revision 1.88.2.1
1 /* $NetBSD: nfs_syscalls.c,v 1.88.2.1 2006/09/09 02:59:25 rpaulo 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 1.88.2.1 2006/09/09 02:59:25 rpaulo 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/buf.h> 58 #include <sys/mbuf.h> 59 #include <sys/socket.h> 60 #include <sys/socketvar.h> 61 #include <sys/signalvar.h> 62 #include <sys/domain.h> 63 #include <sys/protosw.h> 64 #include <sys/namei.h> 65 #include <sys/syslog.h> 66 #include <sys/filedesc.h> 67 #include <sys/kthread.h> 68 #include <sys/kauth.h> 69 70 #include <sys/sa.h> 71 #include <sys/syscallargs.h> 72 73 #include <netinet/in.h> 74 #include <netinet/tcp.h> 75 #ifdef ISO 76 #include <netiso/iso.h> 77 #endif 78 #include <nfs/xdr_subs.h> 79 #include <nfs/rpcv2.h> 80 #include <nfs/nfsproto.h> 81 #include <nfs/nfs.h> 82 #include <nfs/nfsm_subs.h> 83 #include <nfs/nfsrvcache.h> 84 #include <nfs/nfsmount.h> 85 #include <nfs/nfsnode.h> 86 #include <nfs/nqnfs.h> 87 #include <nfs/nfsrtt.h> 88 #include <nfs/nfs_var.h> 89 90 /* Global defs. */ 91 extern int32_t (*nfsrv3_procs[NFS_NPROCS]) __P((struct nfsrv_descript *, 92 struct nfssvc_sock *, 93 struct lwp *, struct mbuf **)); 94 extern time_t nqnfsstarttime; 95 extern int nfsrvw_procrastinate; 96 97 struct nfssvc_sock *nfs_udpsock; 98 #ifdef ISO 99 struct nfssvc_sock *nfs_cltpsock; 100 #endif 101 #ifdef INET6 102 struct nfssvc_sock *nfs_udp6sock; 103 #endif 104 int nuidhash_max = NFS_MAXUIDHASH; 105 int nfsd_waiting = 0; 106 #ifdef NFSSERVER 107 static int nfs_numnfsd = 0; 108 static int notstarted = 1; 109 static int modify_flag = 0; 110 static struct nfsdrt nfsdrt; 111 #endif 112 113 #ifdef NFSSERVER 114 struct simplelock nfsd_slock = SIMPLELOCK_INITIALIZER; 115 struct nfssvc_sockhead nfssvc_sockhead; 116 struct nfssvc_sockhead nfssvc_sockpending; 117 struct nfsdhead nfsd_head; 118 struct nfsdidlehead nfsd_idle_head; 119 120 int nfssvc_sockhead_flag; 121 int nfsd_head_flag; 122 #endif 123 124 MALLOC_DEFINE(M_NFSUID, "NFS uid", "Nfs uid mapping structure"); 125 126 #ifdef NFS 127 struct nfs_iod nfs_asyncdaemon[NFS_MAXASYNCDAEMON]; 128 int nfs_niothreads = -1; /* == "0, and has never been set" */ 129 #endif 130 131 #ifdef NFSSERVER 132 static struct nfssvc_sock *nfsrv_sockalloc __P((void)); 133 static void nfsrv_sockfree __P((struct nfssvc_sock *)); 134 static void nfsd_rt __P((int, struct nfsrv_descript *, int)); 135 #endif 136 137 /* 138 * NFS server system calls 139 */ 140 141 142 /* 143 * Nfs server pseudo system call for the nfsd's 144 * Based on the flag value it either: 145 * - adds a socket to the selection list 146 * - remains in the kernel as an nfsd 147 * - remains in the kernel as an nfsiod 148 */ 149 int 150 sys_nfssvc(l, v, retval) 151 struct lwp *l; 152 void *v; 153 register_t *retval; 154 { 155 struct sys_nfssvc_args /* { 156 syscallarg(int) flag; 157 syscallarg(caddr_t) argp; 158 } */ *uap = v; 159 int error; 160 #ifdef NFS 161 struct nameidata nd; 162 struct nfsmount *nmp; 163 struct nfsd_cargs ncd; 164 #endif 165 #ifdef NFSSERVER 166 int s; 167 struct file *fp; 168 struct mbuf *nam; 169 struct nfsd_args nfsdarg; 170 struct nfsd_srvargs nfsd_srvargs, *nsd = &nfsd_srvargs; 171 struct nfsd *nfsd; 172 struct nfssvc_sock *slp; 173 struct nfsuid *nuidp; 174 #endif 175 176 /* 177 * Must be super user 178 */ 179 error = kauth_authorize_generic(l->l_cred, KAUTH_GENERIC_ISSUSER, 180 &l->l_acflag); 181 if (error) 182 return (error); 183 184 /* Initialize NFS server / client shared data. */ 185 nfs_init(); 186 187 #ifdef NFSSERVER 188 s = splsoftnet(); 189 simple_lock(&nfsd_slock); 190 while (nfssvc_sockhead_flag & SLP_INIT) { 191 nfssvc_sockhead_flag |= SLP_WANTINIT; 192 (void) ltsleep(&nfssvc_sockhead, PSOCK, "nfsd init", 0, 193 &nfsd_slock); 194 } 195 simple_unlock(&nfsd_slock); 196 splx(s); 197 #endif 198 if (SCARG(uap, flag) & NFSSVC_BIOD) { 199 #if defined(NFS) && defined(COMPAT_14) 200 error = nfssvc_iod(l); 201 #else 202 error = ENOSYS; 203 #endif 204 } else if (SCARG(uap, flag) & NFSSVC_MNTD) { 205 #ifndef NFS 206 error = ENOSYS; 207 #else 208 error = copyin(SCARG(uap, argp), (caddr_t)&ncd, sizeof (ncd)); 209 if (error) 210 return (error); 211 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 212 ncd.ncd_dirp, l); 213 error = namei(&nd); 214 if (error) 215 return (error); 216 if ((nd.ni_vp->v_flag & VROOT) == 0) 217 error = EINVAL; 218 nmp = VFSTONFS(nd.ni_vp->v_mount); 219 vput(nd.ni_vp); 220 if (error) 221 return (error); 222 if ((nmp->nm_iflag & NFSMNT_MNTD) && 223 (SCARG(uap, flag) & NFSSVC_GOTAUTH) == 0) 224 return (0); 225 nmp->nm_iflag |= NFSMNT_MNTD; 226 error = nqnfs_clientd(nmp, l->l_cred, &ncd, SCARG(uap, flag), 227 SCARG(uap, argp), l); 228 #endif /* NFS */ 229 } else if (SCARG(uap, flag) & NFSSVC_ADDSOCK) { 230 #ifndef NFSSERVER 231 error = ENOSYS; 232 #else 233 error = copyin(SCARG(uap, argp), (caddr_t)&nfsdarg, 234 sizeof(nfsdarg)); 235 if (error) 236 return (error); 237 /* getsock() will use the descriptor for us */ 238 error = getsock(l->l_proc->p_fd, nfsdarg.sock, &fp); 239 if (error) 240 return (error); 241 /* 242 * Get the client address for connected sockets. 243 */ 244 if (nfsdarg.name == NULL || nfsdarg.namelen == 0) 245 nam = (struct mbuf *)0; 246 else { 247 error = sockargs(&nam, nfsdarg.name, nfsdarg.namelen, 248 MT_SONAME); 249 if (error) { 250 FILE_UNUSE(fp, NULL); 251 return (error); 252 } 253 } 254 error = nfssvc_addsock(fp, nam); 255 FILE_UNUSE(fp, NULL); 256 #endif /* !NFSSERVER */ 257 } else if (SCARG(uap, flag) & NFSSVC_SETEXPORTSLIST) { 258 #ifndef NFSSERVER 259 error = ENOSYS; 260 #else 261 struct export_args *args; 262 struct mountd_exports_list mel; 263 264 error = copyin(SCARG(uap, argp), &mel, sizeof(mel)); 265 if (error != 0) 266 return error; 267 268 args = (struct export_args *)malloc(mel.mel_nexports * 269 sizeof(struct export_args), M_TEMP, M_WAITOK); 270 error = copyin(mel.mel_exports, args, mel.mel_nexports * 271 sizeof(struct export_args)); 272 if (error != 0) { 273 free(args, M_TEMP); 274 return error; 275 } 276 mel.mel_exports = args; 277 278 error = mountd_set_exports_list(&mel, l); 279 280 free(args, M_TEMP); 281 #endif /* !NFSSERVER */ 282 } else { 283 #ifndef NFSSERVER 284 error = ENOSYS; 285 #else 286 error = copyin(SCARG(uap, argp), (caddr_t)nsd, sizeof (*nsd)); 287 if (error) 288 return (error); 289 if ((SCARG(uap, flag) & NFSSVC_AUTHIN) && 290 ((nfsd = nsd->nsd_nfsd)) != NULL && 291 (nfsd->nfsd_slp->ns_flag & SLP_VALID)) { 292 slp = nfsd->nfsd_slp; 293 294 /* 295 * First check to see if another nfsd has already 296 * added this credential. 297 */ 298 LIST_FOREACH(nuidp, NUIDHASH(slp, nsd->nsd_cr.cr_uid), 299 nu_hash) { 300 if (kauth_cred_geteuid(nuidp->nu_cr) == 301 nsd->nsd_cr.cr_uid && 302 (!nfsd->nfsd_nd->nd_nam2 || 303 netaddr_match(NU_NETFAM(nuidp), 304 &nuidp->nu_haddr, nfsd->nfsd_nd->nd_nam2))) 305 break; 306 } 307 if (nuidp) { 308 kauth_cred_hold(nuidp->nu_cr); 309 nfsd->nfsd_nd->nd_cr = nuidp->nu_cr; 310 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL; 311 } else { 312 /* 313 * Nope, so we will. 314 */ 315 if (slp->ns_numuids < nuidhash_max) { 316 slp->ns_numuids++; 317 nuidp = (struct nfsuid *) 318 malloc(sizeof (struct nfsuid), M_NFSUID, 319 M_WAITOK); 320 } else 321 nuidp = (struct nfsuid *)0; 322 if ((slp->ns_flag & SLP_VALID) == 0) { 323 if (nuidp) 324 free((caddr_t)nuidp, M_NFSUID); 325 } else { 326 if (nuidp == (struct nfsuid *)0) { 327 nuidp = TAILQ_FIRST(&slp->ns_uidlruhead); 328 LIST_REMOVE(nuidp, nu_hash); 329 TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, 330 nu_lru); 331 if (nuidp->nu_flag & NU_NAM) 332 m_freem(nuidp->nu_nam); 333 } 334 nuidp->nu_flag = 0; 335 kauth_cred_uucvt(nuidp->nu_cr, &nsd->nsd_cr); 336 nuidp->nu_timestamp = nsd->nsd_timestamp; 337 nuidp->nu_expire = time_second + nsd->nsd_ttl; 338 /* 339 * and save the session key in nu_key. 340 */ 341 memcpy(nuidp->nu_key, nsd->nsd_key, 342 sizeof(nsd->nsd_key)); 343 if (nfsd->nfsd_nd->nd_nam2) { 344 struct sockaddr_in *saddr; 345 346 saddr = mtod(nfsd->nfsd_nd->nd_nam2, 347 struct sockaddr_in *); 348 switch (saddr->sin_family) { 349 case AF_INET: 350 nuidp->nu_flag |= NU_INETADDR; 351 nuidp->nu_inetaddr = 352 saddr->sin_addr.s_addr; 353 break; 354 case AF_ISO: 355 default: 356 nuidp->nu_flag |= NU_NAM; 357 nuidp->nu_nam = m_copym( 358 nfsd->nfsd_nd->nd_nam2, 0, 359 M_COPYALL, M_WAIT); 360 break; 361 }; 362 } 363 TAILQ_INSERT_TAIL(&slp->ns_uidlruhead, nuidp, 364 nu_lru); 365 LIST_INSERT_HEAD(NUIDHASH(slp, nsd->nsd_uid), 366 nuidp, nu_hash); 367 kauth_cred_hold(nuidp->nu_cr); 368 nfsd->nfsd_nd->nd_cr = nuidp->nu_cr; 369 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL; 370 } 371 } 372 } 373 if ((SCARG(uap, flag) & NFSSVC_AUTHINFAIL) && 374 (nfsd = nsd->nsd_nfsd)) 375 nfsd->nfsd_flag |= NFSD_AUTHFAIL; 376 error = nfssvc_nfsd(nsd, SCARG(uap, argp), l); 377 #endif /* !NFSSERVER */ 378 } 379 if (error == EINTR || error == ERESTART) 380 error = 0; 381 return (error); 382 } 383 384 #ifdef NFSSERVER 385 MALLOC_DEFINE(M_NFSD, "NFS daemon", "Nfs server daemon structure"); 386 MALLOC_DEFINE(M_NFSSVC, "NFS srvsock", "Nfs server structure"); 387 388 static struct nfssvc_sock * 389 nfsrv_sockalloc() 390 { 391 struct nfssvc_sock *slp; 392 int s; 393 394 slp = (struct nfssvc_sock *) 395 malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK); 396 memset(slp, 0, sizeof (struct nfssvc_sock)); 397 simple_lock_init(&slp->ns_lock); 398 TAILQ_INIT(&slp->ns_uidlruhead); 399 LIST_INIT(&slp->ns_tq); 400 SIMPLEQ_INIT(&slp->ns_sendq); 401 s = splsoftnet(); 402 simple_lock(&nfsd_slock); 403 TAILQ_INSERT_TAIL(&nfssvc_sockhead, slp, ns_chain); 404 simple_unlock(&nfsd_slock); 405 splx(s); 406 407 return slp; 408 } 409 410 static void 411 nfsrv_sockfree(struct nfssvc_sock *slp) 412 { 413 414 KASSERT(slp->ns_so == NULL); 415 KASSERT(slp->ns_fp == NULL); 416 KASSERT((slp->ns_flag & SLP_VALID) == 0); 417 free(slp, M_NFSSVC); 418 } 419 420 /* 421 * Adds a socket to the list for servicing by nfsds. 422 */ 423 int 424 nfssvc_addsock(fp, mynam) 425 struct file *fp; 426 struct mbuf *mynam; 427 { 428 struct mbuf *m; 429 int siz; 430 struct nfssvc_sock *slp; 431 struct socket *so; 432 struct nfssvc_sock *tslp; 433 int error, s; 434 435 so = (struct socket *)fp->f_data; 436 tslp = (struct nfssvc_sock *)0; 437 /* 438 * Add it to the list, as required. 439 */ 440 if (so->so_proto->pr_protocol == IPPROTO_UDP) { 441 #ifdef INET6 442 if (so->so_proto->pr_domain->dom_family == AF_INET6) 443 tslp = nfs_udp6sock; 444 else 445 #endif 446 tslp = nfs_udpsock; 447 if (tslp->ns_flag & SLP_VALID) { 448 m_freem(mynam); 449 return (EPERM); 450 } 451 #ifdef ISO 452 } else if (so->so_proto->pr_protocol == ISOPROTO_CLTP) { 453 tslp = nfs_cltpsock; 454 if (tslp->ns_flag & SLP_VALID) { 455 m_freem(mynam); 456 return (EPERM); 457 } 458 #endif /* ISO */ 459 } 460 if (so->so_type == SOCK_STREAM) 461 siz = NFS_MAXPACKET + sizeof (u_long); 462 else 463 siz = NFS_MAXPACKET; 464 error = soreserve(so, siz, siz); 465 if (error) { 466 m_freem(mynam); 467 return (error); 468 } 469 470 /* 471 * Set protocol specific options { for now TCP only } and 472 * reserve some space. For datagram sockets, this can get called 473 * repeatedly for the same socket, but that isn't harmful. 474 */ 475 if (so->so_type == SOCK_STREAM) { 476 m = m_get(M_WAIT, MT_SOOPTS); 477 MCLAIM(m, &nfs_mowner); 478 *mtod(m, int32_t *) = 1; 479 m->m_len = sizeof(int32_t); 480 sosetopt(so, SOL_SOCKET, SO_KEEPALIVE, m); 481 } 482 if ((so->so_proto->pr_domain->dom_family == AF_INET 483 #ifdef INET6 484 || so->so_proto->pr_domain->dom_family == AF_INET6 485 #endif 486 ) && 487 so->so_proto->pr_protocol == IPPROTO_TCP) { 488 m = m_get(M_WAIT, MT_SOOPTS); 489 MCLAIM(m, &nfs_mowner); 490 *mtod(m, int32_t *) = 1; 491 m->m_len = sizeof(int32_t); 492 sosetopt(so, IPPROTO_TCP, TCP_NODELAY, m); 493 } 494 so->so_rcv.sb_flags &= ~SB_NOINTR; 495 so->so_rcv.sb_timeo = 0; 496 so->so_snd.sb_flags &= ~SB_NOINTR; 497 so->so_snd.sb_timeo = 0; 498 if (tslp) 499 slp = tslp; 500 else { 501 slp = nfsrv_sockalloc(); 502 } 503 slp->ns_so = so; 504 slp->ns_nam = mynam; 505 fp->f_count++; 506 slp->ns_fp = fp; 507 s = splsoftnet(); 508 so->so_upcallarg = (caddr_t)slp; 509 so->so_upcall = nfsrv_rcv; 510 so->so_rcv.sb_flags |= SB_UPCALL; 511 slp->ns_flag = (SLP_VALID | SLP_NEEDQ); 512 nfsrv_wakenfsd(slp); 513 splx(s); 514 return (0); 515 } 516 517 /* 518 * Called by nfssvc() for nfsds. Just loops around servicing rpc requests 519 * until it is killed by a signal. 520 */ 521 int 522 nfssvc_nfsd(nsd, argp, l) 523 struct nfsd_srvargs *nsd; 524 caddr_t argp; 525 struct lwp *l; 526 { 527 struct timeval tv; 528 struct mbuf *m; 529 struct nfssvc_sock *slp; 530 struct nfsd *nfsd = nsd->nsd_nfsd; 531 struct nfsrv_descript *nd = NULL; 532 struct mbuf *mreq; 533 u_quad_t cur_usec; 534 int error = 0, cacherep, s, siz, sotype, writes_todo; 535 struct proc *p = l->l_proc; 536 537 #ifndef nolint 538 cacherep = RC_DOIT; 539 writes_todo = 0; 540 #endif 541 s = splsoftnet(); 542 if (nfsd == (struct nfsd *)0) { 543 nsd->nsd_nfsd = nfsd = (struct nfsd *) 544 malloc(sizeof (struct nfsd), M_NFSD, M_WAITOK); 545 memset((caddr_t)nfsd, 0, sizeof (struct nfsd)); 546 nfsd->nfsd_procp = p; 547 simple_lock(&nfsd_slock); 548 TAILQ_INSERT_TAIL(&nfsd_head, nfsd, nfsd_chain); 549 nfs_numnfsd++; 550 simple_unlock(&nfsd_slock); 551 } 552 PHOLD(l); 553 /* 554 * Loop getting rpc requests until SIGKILL. 555 */ 556 for (;;) { 557 if (nfsd->nfsd_slp == NULL) { 558 simple_lock(&nfsd_slock); 559 while (nfsd->nfsd_slp == NULL && 560 (nfsd_head_flag & NFSD_CHECKSLP) == 0) { 561 SLIST_INSERT_HEAD(&nfsd_idle_head, nfsd, 562 nfsd_idle); 563 nfsd_waiting++; 564 error = ltsleep(nfsd, PSOCK | PCATCH, "nfsd", 565 0, &nfsd_slock); 566 nfsd_waiting--; 567 if (error) { 568 slp = nfsd->nfsd_slp; 569 nfsd->nfsd_slp = NULL; 570 if (!slp) 571 SLIST_REMOVE(&nfsd_idle_head, 572 nfsd, nfsd, nfsd_idle); 573 simple_unlock(&nfsd_slock); 574 if (slp) { 575 nfsrv_wakenfsd(slp); 576 nfsrv_slpderef(slp); 577 } 578 goto done; 579 } 580 } 581 if (nfsd->nfsd_slp == NULL && 582 (nfsd_head_flag & NFSD_CHECKSLP) != 0) { 583 slp = TAILQ_FIRST(&nfssvc_sockpending); 584 if (slp) { 585 KASSERT((slp->ns_flag & 586 (SLP_VALID | SLP_DOREC)) 587 == (SLP_VALID | SLP_DOREC)); 588 TAILQ_REMOVE(&nfssvc_sockpending, slp, 589 ns_pending); 590 slp->ns_flag &= ~SLP_DOREC; 591 slp->ns_sref++; 592 nfsd->nfsd_slp = slp; 593 } else 594 nfsd_head_flag &= ~NFSD_CHECKSLP; 595 } 596 simple_unlock(&nfsd_slock); 597 if ((slp = nfsd->nfsd_slp) == NULL) 598 continue; 599 if (slp->ns_flag & SLP_VALID) { 600 if (slp->ns_flag & SLP_DISCONN) 601 nfsrv_zapsock(slp); 602 else if ((slp->ns_flag & SLP_NEEDQ) != 0) { 603 nfsrv_rcv(slp->ns_so, (void *)slp, 604 M_WAIT); 605 } 606 error = nfsrv_dorec(slp, nfsd, &nd); 607 getmicrotime(&tv); 608 cur_usec = (u_quad_t)tv.tv_sec * 1000000 + 609 (u_quad_t)tv.tv_usec; 610 if (error && LIST_FIRST(&slp->ns_tq) && 611 LIST_FIRST(&slp->ns_tq)->nd_time <= 612 cur_usec) { 613 error = 0; 614 cacherep = RC_DOIT; 615 writes_todo = 1; 616 } else 617 writes_todo = 0; 618 if (error == 0 && slp->ns_rec != NULL) { 619 nfsrv_wakenfsd(slp); 620 } 621 } 622 } else { 623 error = 0; 624 slp = nfsd->nfsd_slp; 625 } 626 if (error || (slp->ns_flag & SLP_VALID) == 0) { 627 if (nd) { 628 nfsdreq_free(nd); 629 nd = NULL; 630 } 631 nfsd->nfsd_slp = NULL; 632 nfsrv_slpderef(slp); 633 continue; 634 } 635 splx(s); 636 sotype = slp->ns_so->so_type; 637 if (nd) { 638 getmicrotime(&nd->nd_starttime); 639 if (nd->nd_nam2) 640 nd->nd_nam = nd->nd_nam2; 641 else 642 nd->nd_nam = slp->ns_nam; 643 644 /* 645 * Check to see if authorization is needed. 646 */ 647 if (nfsd->nfsd_flag & NFSD_NEEDAUTH) { 648 nfsd->nfsd_flag &= ~NFSD_NEEDAUTH; 649 nsd->nsd_haddr = mtod(nd->nd_nam, 650 struct sockaddr_in *)->sin_addr.s_addr; 651 nsd->nsd_authlen = nfsd->nfsd_authlen; 652 nsd->nsd_verflen = nfsd->nfsd_verflen; 653 if (!copyout(nfsd->nfsd_authstr, 654 nsd->nsd_authstr, nfsd->nfsd_authlen) && 655 !copyout(nfsd->nfsd_verfstr, 656 nsd->nsd_verfstr, nfsd->nfsd_verflen) && 657 !copyout(nsd, argp, sizeof (*nsd))) { 658 PRELE(l); 659 return (ENEEDAUTH); 660 } 661 cacherep = RC_DROPIT; 662 } else 663 cacherep = nfsrv_getcache(nd, slp, &mreq); 664 665 /* 666 * Check for just starting up for NQNFS and send 667 * fake "try again later" replies to the NQNFS clients. 668 */ 669 if (notstarted && nqnfsstarttime <= time_second) { 670 if (modify_flag) { 671 nqnfsstarttime = 672 time_second + nqsrv_writeslack; 673 modify_flag = 0; 674 } else 675 notstarted = 0; 676 } 677 if (notstarted) { 678 if ((nd->nd_flag & ND_NQNFS) == 0) 679 cacherep = RC_DROPIT; 680 else if (nd->nd_procnum != NFSPROC_WRITE) { 681 nd->nd_procnum = NFSPROC_NOOP; 682 nd->nd_repstat = NQNFS_TRYLATER; 683 cacherep = RC_DOIT; 684 } else 685 modify_flag = 1; 686 } else if (nfsd->nfsd_flag & NFSD_AUTHFAIL) { 687 nfsd->nfsd_flag &= ~NFSD_AUTHFAIL; 688 nd->nd_procnum = NFSPROC_NOOP; 689 nd->nd_repstat = 690 (NFSERR_AUTHERR | AUTH_TOOWEAK); 691 cacherep = RC_DOIT; 692 } 693 } 694 695 /* 696 * Loop to get all the write rpc relies that have been 697 * gathered together. 698 */ 699 do { 700 #ifdef DIAGNOSTIC 701 int lockcount; 702 #endif 703 switch (cacherep) { 704 case RC_DOIT: 705 #ifdef DIAGNOSTIC 706 /* 707 * NFS server procs should neither release 708 * locks already held, nor leave things 709 * locked. Catch this sooner, rather than 710 * later (when we try to relock something we 711 * already have locked). Careful inspection 712 * of the failing routine usually turns up the 713 * lock leak.. once we know what it is.. 714 */ 715 lockcount = l->l_locks; 716 #endif 717 mreq = NULL; 718 netexport_rdlock(); 719 if (writes_todo || nd == NULL || 720 (!(nd->nd_flag & ND_NFSV3) && 721 nd->nd_procnum == NFSPROC_WRITE && 722 nfsrvw_procrastinate > 0 && !notstarted)) 723 error = nfsrv_writegather(&nd, slp, 724 l, &mreq); 725 else 726 error = 727 (*(nfsrv3_procs[nd->nd_procnum])) 728 (nd, slp, l, &mreq); 729 netexport_rdunlock(); 730 #ifdef DIAGNOSTIC 731 if (l->l_locks != lockcount) { 732 /* 733 * If you see this panic, audit 734 * nfsrv3_procs[nd->nd_procnum] for 735 * vnode locking errors (usually, it's 736 * due to forgetting to vput() 737 * something). 738 */ 739 #ifdef DEBUG 740 extern void printlockedvnodes(void); 741 printlockedvnodes(); 742 #endif 743 printf("nfsd: locking botch in op %d" 744 " (before %d, after %d)\n", 745 nd ? nd->nd_procnum : -1, 746 lockcount, l->l_locks); 747 } 748 #endif 749 if (mreq == NULL) { 750 if (nd != NULL) { 751 if (nd->nd_nam2) 752 m_free(nd->nd_nam2); 753 if (nd->nd_mrep) 754 m_freem(nd->nd_mrep); 755 } 756 break; 757 } 758 if (error) { 759 if (nd->nd_procnum != NQNFSPROC_VACATED) 760 nfsstats.srv_errs++; 761 nfsrv_updatecache(nd, FALSE, mreq); 762 if (nd->nd_nam2) 763 m_freem(nd->nd_nam2); 764 break; 765 } 766 nfsstats.srvrpccnt[nd->nd_procnum]++; 767 nfsrv_updatecache(nd, TRUE, mreq); 768 nd->nd_mrep = (struct mbuf *)0; 769 case RC_REPLY: 770 m = mreq; 771 siz = 0; 772 while (m) { 773 siz += m->m_len; 774 m = m->m_next; 775 } 776 if (siz <= 0 || siz > NFS_MAXPACKET) { 777 printf("mbuf siz=%d\n",siz); 778 panic("Bad nfs svc reply"); 779 } 780 m = mreq; 781 m->m_pkthdr.len = siz; 782 m->m_pkthdr.rcvif = (struct ifnet *)0; 783 /* 784 * For stream protocols, prepend a Sun RPC 785 * Record Mark. 786 */ 787 if (sotype == SOCK_STREAM) { 788 M_PREPEND(m, NFSX_UNSIGNED, M_WAIT); 789 *mtod(m, u_int32_t *) = 790 htonl(0x80000000 | siz); 791 } 792 nd->nd_mreq = m; 793 if (nfsrtton) { 794 nfsd_rt(slp->ns_so->so_type, nd, 795 cacherep); 796 } 797 s = splsoftnet(); 798 error = nfsdsock_sendreply(slp, nd); 799 nd = NULL; 800 if (error == EPIPE) 801 nfsrv_zapsock(slp); 802 if (error == EINTR || error == ERESTART) { 803 nfsrv_slpderef(slp); 804 goto done; 805 } 806 splx(s); 807 break; 808 case RC_DROPIT: 809 if (nfsrtton) 810 nfsd_rt(sotype, nd, cacherep); 811 m_freem(nd->nd_mrep); 812 m_freem(nd->nd_nam2); 813 break; 814 } 815 if (nd) { 816 nfsdreq_free(nd); 817 nd = NULL; 818 } 819 820 /* 821 * Check to see if there are outstanding writes that 822 * need to be serviced. 823 */ 824 getmicrotime(&tv); 825 cur_usec = (u_quad_t)tv.tv_sec * 1000000 + 826 (u_quad_t)tv.tv_usec; 827 s = splsoftclock(); 828 if (LIST_FIRST(&slp->ns_tq) && 829 LIST_FIRST(&slp->ns_tq)->nd_time <= cur_usec) { 830 cacherep = RC_DOIT; 831 writes_todo = 1; 832 } else 833 writes_todo = 0; 834 splx(s); 835 } while (writes_todo); 836 s = splsoftnet(); 837 if (nfsrv_dorec(slp, nfsd, &nd)) { 838 nfsd->nfsd_slp = NULL; 839 nfsrv_slpderef(slp); 840 } 841 } 842 done: 843 PRELE(l); 844 simple_lock(&nfsd_slock); 845 TAILQ_REMOVE(&nfsd_head, nfsd, nfsd_chain); 846 simple_unlock(&nfsd_slock); 847 splx(s); 848 free((caddr_t)nfsd, M_NFSD); 849 nsd->nsd_nfsd = (struct nfsd *)0; 850 if (--nfs_numnfsd == 0) 851 nfsrv_init(TRUE); /* Reinitialize everything */ 852 return (error); 853 } 854 855 /* 856 * Shut down a socket associated with an nfssvc_sock structure. 857 * Should be called with the send lock set, if required. 858 * The trick here is to increment the sref at the start, so that the nfsds 859 * will stop using it and clear ns_flag at the end so that it will not be 860 * reassigned during cleanup. 861 * 862 * called at splsoftnet. 863 */ 864 void 865 nfsrv_zapsock(slp) 866 struct nfssvc_sock *slp; 867 { 868 struct nfsuid *nuidp, *nnuidp; 869 struct nfsrv_descript *nwp, *nnwp; 870 struct socket *so; 871 int s; 872 873 if (nfsdsock_drain(slp)) { 874 return; 875 } 876 simple_lock(&nfsd_slock); 877 if (slp->ns_flag & SLP_DOREC) { 878 TAILQ_REMOVE(&nfssvc_sockpending, slp, ns_pending); 879 } 880 simple_unlock(&nfsd_slock); 881 882 so = slp->ns_so; 883 KASSERT(so != NULL); 884 so->so_upcall = NULL; 885 so->so_upcallarg = NULL; 886 so->so_rcv.sb_flags &= ~SB_UPCALL; 887 soshutdown(so, SHUT_RDWR); 888 889 if (slp->ns_nam) 890 m_free(slp->ns_nam); 891 m_freem(slp->ns_raw); 892 m_freem(slp->ns_rec); 893 for (nuidp = TAILQ_FIRST(&slp->ns_uidlruhead); nuidp != 0; 894 nuidp = nnuidp) { 895 nnuidp = TAILQ_NEXT(nuidp, nu_lru); 896 LIST_REMOVE(nuidp, nu_hash); 897 TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, nu_lru); 898 if (nuidp->nu_flag & NU_NAM) 899 m_freem(nuidp->nu_nam); 900 free((caddr_t)nuidp, M_NFSUID); 901 } 902 s = splsoftclock(); 903 for (nwp = LIST_FIRST(&slp->ns_tq); nwp; nwp = nnwp) { 904 nnwp = LIST_NEXT(nwp, nd_tq); 905 LIST_REMOVE(nwp, nd_tq); 906 nfsdreq_free(nwp); 907 } 908 splx(s); 909 } 910 911 /* 912 * Derefence a server socket structure. If it has no more references and 913 * is no longer valid, you can throw it away. 914 */ 915 void 916 nfsrv_slpderef(slp) 917 struct nfssvc_sock *slp; 918 { 919 LOCK_ASSERT(!simple_lock_held(&nfsd_slock)); 920 921 if (--(slp->ns_sref) == 0 && (slp->ns_flag & SLP_VALID) == 0) { 922 struct file *fp; 923 int s = splsoftnet(); 924 simple_lock(&nfsd_slock); 925 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain); 926 simple_unlock(&nfsd_slock); 927 splx(s); 928 929 fp = slp->ns_fp; 930 if (fp != NULL) { 931 slp->ns_fp = NULL; 932 KASSERT(fp != NULL); 933 KASSERT(fp->f_data == slp->ns_so); 934 simple_lock(&fp->f_slock); 935 FILE_USE(fp); 936 closef(fp, (struct lwp *)0); 937 slp->ns_so = NULL; 938 } 939 940 nfsrv_sockfree(slp); 941 } 942 } 943 944 /* 945 * Initialize the data structures for the server. 946 * Handshake with any new nfsds starting up to avoid any chance of 947 * corruption. 948 */ 949 void 950 nfsrv_init(terminating) 951 int terminating; 952 { 953 struct nfssvc_sock *slp; 954 int s; 955 956 s = splsoftnet(); 957 simple_lock(&nfsd_slock); 958 if (nfssvc_sockhead_flag & SLP_INIT) 959 panic("nfsd init"); 960 nfssvc_sockhead_flag |= SLP_INIT; 961 962 if (terminating) { 963 while ((slp = TAILQ_FIRST(&nfssvc_sockhead)) != NULL) { 964 simple_unlock(&nfsd_slock); 965 KASSERT(slp->ns_sref == 0); 966 slp->ns_sref++; 967 nfsrv_zapsock(slp); 968 nfsrv_slpderef(slp); 969 simple_lock(&nfsd_slock); 970 } 971 simple_unlock(&nfsd_slock); 972 splx(s); 973 nfsrv_cleancache(); /* And clear out server cache */ 974 } else { 975 simple_unlock(&nfsd_slock); 976 splx(s); 977 nfs_pub.np_valid = 0; 978 } 979 980 TAILQ_INIT(&nfssvc_sockhead); 981 TAILQ_INIT(&nfssvc_sockpending); 982 nfssvc_sockhead_flag &= ~SLP_INIT; 983 984 TAILQ_INIT(&nfsd_head); 985 SLIST_INIT(&nfsd_idle_head); 986 nfsd_head_flag &= ~NFSD_CHECKSLP; 987 988 nfs_udpsock = nfsrv_sockalloc(); 989 990 #ifdef INET6 991 nfs_udp6sock = nfsrv_sockalloc(); 992 #endif 993 994 #ifdef ISO 995 nfs_cltpsock = nfsrv_sockalloc(); 996 #endif 997 998 simple_lock(&nfsd_slock); 999 if (nfssvc_sockhead_flag & SLP_WANTINIT) { 1000 nfssvc_sockhead_flag &= ~SLP_WANTINIT; 1001 wakeup(&nfssvc_sockhead); 1002 } 1003 simple_unlock(&nfsd_slock); 1004 splx(s); 1005 } 1006 1007 /* 1008 * Add entries to the server monitor log. 1009 */ 1010 static void 1011 nfsd_rt(sotype, nd, cacherep) 1012 int sotype; 1013 struct nfsrv_descript *nd; 1014 int cacherep; 1015 { 1016 struct timeval tv; 1017 struct drt *rt; 1018 1019 rt = &nfsdrt.drt[nfsdrt.pos]; 1020 if (cacherep == RC_DOIT) 1021 rt->flag = 0; 1022 else if (cacherep == RC_REPLY) 1023 rt->flag = DRT_CACHEREPLY; 1024 else 1025 rt->flag = DRT_CACHEDROP; 1026 if (sotype == SOCK_STREAM) 1027 rt->flag |= DRT_TCP; 1028 if (nd->nd_flag & ND_NQNFS) 1029 rt->flag |= DRT_NQNFS; 1030 else if (nd->nd_flag & ND_NFSV3) 1031 rt->flag |= DRT_NFSV3; 1032 rt->proc = nd->nd_procnum; 1033 if (mtod(nd->nd_nam, struct sockaddr *)->sa_family == AF_INET) 1034 rt->ipadr = mtod(nd->nd_nam, struct sockaddr_in *)->sin_addr.s_addr; 1035 else 1036 rt->ipadr = INADDR_ANY; 1037 getmicrotime(&tv); 1038 rt->resptime = ((tv.tv_sec - nd->nd_starttime.tv_sec) * 1000000) + 1039 (tv.tv_usec - nd->nd_starttime.tv_usec); 1040 rt->tstamp = tv; 1041 nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ; 1042 } 1043 #endif /* NFSSERVER */ 1044 1045 #ifdef NFS 1046 1047 int nfs_defect = 0; 1048 /* 1049 * Asynchronous I/O threads for client nfs. 1050 * They do read-ahead and write-behind operations on the block I/O cache. 1051 * Never returns unless it fails or gets killed. 1052 */ 1053 1054 int 1055 nfssvc_iod(l) 1056 struct lwp *l; 1057 { 1058 struct buf *bp; 1059 int i; 1060 struct nfs_iod *myiod; 1061 struct nfsmount *nmp; 1062 int error = 0; 1063 struct proc *p = l->l_proc; 1064 1065 /* 1066 * Assign my position or return error if too many already running 1067 */ 1068 myiod = NULL; 1069 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) 1070 if (nfs_asyncdaemon[i].nid_proc == NULL) { 1071 myiod = &nfs_asyncdaemon[i]; 1072 break; 1073 } 1074 if (myiod == NULL) 1075 return (EBUSY); 1076 myiod->nid_proc = p; 1077 nfs_numasync++; 1078 PHOLD(l); 1079 /* 1080 * Just loop around doing our stuff until SIGKILL 1081 */ 1082 for (;;) { 1083 while (/*CONSTCOND*/ TRUE) { 1084 simple_lock(&myiod->nid_slock); 1085 nmp = myiod->nid_mount; 1086 if (nmp) { 1087 simple_lock(&nmp->nm_slock); 1088 if (!TAILQ_EMPTY(&nmp->nm_bufq)) { 1089 simple_unlock(&myiod->nid_slock); 1090 break; 1091 } 1092 nmp->nm_bufqiods--; 1093 simple_unlock(&nmp->nm_slock); 1094 } 1095 myiod->nid_want = p; 1096 myiod->nid_mount = NULL; 1097 error = ltsleep(&myiod->nid_want, 1098 PWAIT | PCATCH | PNORELOCK, "nfsidl", 0, 1099 &myiod->nid_slock); 1100 if (error) 1101 goto quit; 1102 } 1103 1104 while ((bp = TAILQ_FIRST(&nmp->nm_bufq)) != NULL) { 1105 /* Take one off the front of the list */ 1106 TAILQ_REMOVE(&nmp->nm_bufq, bp, b_freelist); 1107 nmp->nm_bufqlen--; 1108 if (nmp->nm_bufqwant && 1109 nmp->nm_bufqlen < 2 * nfs_numasync) { 1110 nmp->nm_bufqwant = FALSE; 1111 wakeup(&nmp->nm_bufq); 1112 } 1113 simple_unlock(&nmp->nm_slock); 1114 (void)nfs_doio(bp); 1115 simple_lock(&nmp->nm_slock); 1116 /* 1117 * If there are more than one iod on this mount, 1118 * then defect so that the iods can be shared out 1119 * fairly between the mounts 1120 */ 1121 if (nfs_defect && nmp->nm_bufqiods > 1) { 1122 myiod->nid_mount = NULL; 1123 nmp->nm_bufqiods--; 1124 break; 1125 } 1126 } 1127 simple_unlock(&nmp->nm_slock); 1128 } 1129 quit: 1130 PRELE(l); 1131 if (nmp) 1132 nmp->nm_bufqiods--; 1133 myiod->nid_want = NULL; 1134 myiod->nid_mount = NULL; 1135 myiod->nid_proc = NULL; 1136 nfs_numasync--; 1137 1138 return error; 1139 } 1140 1141 void 1142 nfs_iodinit() 1143 { 1144 int i; 1145 1146 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) 1147 simple_lock_init(&nfs_asyncdaemon[i].nid_slock); 1148 } 1149 1150 void 1151 start_nfsio(arg) 1152 void *arg; 1153 { 1154 nfssvc_iod(curlwp); 1155 1156 kthread_exit(0); 1157 } 1158 1159 void 1160 nfs_getset_niothreads(set) 1161 int set; 1162 { 1163 int i, have, start; 1164 1165 for (have = 0, i = 0; i < NFS_MAXASYNCDAEMON; i++) 1166 if (nfs_asyncdaemon[i].nid_proc != NULL) 1167 have++; 1168 1169 if (set) { 1170 /* clamp to sane range */ 1171 nfs_niothreads = max(0, min(nfs_niothreads, NFS_MAXASYNCDAEMON)); 1172 1173 start = nfs_niothreads - have; 1174 1175 while (start > 0) { 1176 kthread_create1(start_nfsio, NULL, NULL, "nfsio"); 1177 start--; 1178 } 1179 1180 for (i = 0; (start < 0) && (i < NFS_MAXASYNCDAEMON); i++) 1181 if (nfs_asyncdaemon[i].nid_proc != NULL) { 1182 psignal(nfs_asyncdaemon[i].nid_proc, SIGKILL); 1183 start++; 1184 } 1185 } else { 1186 if (nfs_niothreads >= 0) 1187 nfs_niothreads = have; 1188 } 1189 } 1190 1191 /* 1192 * Get an authorization string for the uid by having the mount_nfs sitting 1193 * on this mount point porpous out of the kernel and do it. 1194 */ 1195 int 1196 nfs_getauth(nmp, rep, cred, auth_str, auth_len, verf_str, verf_len, key) 1197 struct nfsmount *nmp; 1198 struct nfsreq *rep; 1199 kauth_cred_t cred; 1200 char **auth_str; 1201 int *auth_len; 1202 char *verf_str; 1203 int *verf_len; 1204 NFSKERBKEY_T key; /* return session key */ 1205 { 1206 int error = 0; 1207 1208 while ((nmp->nm_iflag & NFSMNT_WAITAUTH) == 0) { 1209 nmp->nm_iflag |= NFSMNT_WANTAUTH; 1210 (void) tsleep((caddr_t)&nmp->nm_authtype, PSOCK, 1211 "nfsauth1", 2 * hz); 1212 error = nfs_sigintr(nmp, rep, rep->r_lwp); 1213 if (error) { 1214 nmp->nm_iflag &= ~NFSMNT_WANTAUTH; 1215 return (error); 1216 } 1217 } 1218 nmp->nm_iflag &= ~(NFSMNT_WAITAUTH | NFSMNT_WANTAUTH); 1219 nmp->nm_authstr = *auth_str = (char *)malloc(RPCAUTH_MAXSIZ, M_TEMP, M_WAITOK); 1220 nmp->nm_authlen = RPCAUTH_MAXSIZ; 1221 nmp->nm_verfstr = verf_str; 1222 nmp->nm_verflen = *verf_len; 1223 nmp->nm_authuid = kauth_cred_geteuid(cred); 1224 wakeup((caddr_t)&nmp->nm_authstr); 1225 1226 /* 1227 * And wait for mount_nfs to do its stuff. 1228 */ 1229 while ((nmp->nm_iflag & NFSMNT_HASAUTH) == 0 && error == 0) { 1230 (void) tsleep((caddr_t)&nmp->nm_authlen, PSOCK, 1231 "nfsauth2", 2 * hz); 1232 error = nfs_sigintr(nmp, rep, rep->r_lwp); 1233 } 1234 if (nmp->nm_iflag & NFSMNT_AUTHERR) { 1235 nmp->nm_iflag &= ~NFSMNT_AUTHERR; 1236 error = EAUTH; 1237 } 1238 if (error) 1239 free((caddr_t)*auth_str, M_TEMP); 1240 else { 1241 *auth_len = nmp->nm_authlen; 1242 *verf_len = nmp->nm_verflen; 1243 memcpy(key, nmp->nm_key, sizeof (NFSKERBKEY_T)); 1244 } 1245 nmp->nm_iflag &= ~NFSMNT_HASAUTH; 1246 nmp->nm_iflag |= NFSMNT_WAITAUTH; 1247 if (nmp->nm_iflag & NFSMNT_WANTAUTH) { 1248 nmp->nm_iflag &= ~NFSMNT_WANTAUTH; 1249 wakeup((caddr_t)&nmp->nm_authtype); 1250 } 1251 return (error); 1252 } 1253 1254 /* 1255 * Get a nickname authenticator and verifier. 1256 */ 1257 int 1258 nfs_getnickauth(nmp, cred, auth_str, auth_len, verf_str, verf_len) 1259 struct nfsmount *nmp; 1260 kauth_cred_t cred; 1261 char **auth_str; 1262 int *auth_len; 1263 char *verf_str; 1264 int verf_len; 1265 { 1266 struct timeval ktvin, ktvout, tv; 1267 struct nfsuid *nuidp; 1268 u_int32_t *nickp, *verfp; 1269 1270 memset(&ktvout, 0, sizeof ktvout); /* XXX gcc */ 1271 1272 #ifdef DIAGNOSTIC 1273 if (verf_len < (4 * NFSX_UNSIGNED)) 1274 panic("nfs_getnickauth verf too small"); 1275 #endif 1276 LIST_FOREACH(nuidp, NMUIDHASH(nmp, kauth_cred_geteuid(cred)), nu_hash) { 1277 if (kauth_cred_geteuid(nuidp->nu_cr) == kauth_cred_geteuid(cred)) 1278 break; 1279 } 1280 if (!nuidp || nuidp->nu_expire < time_second) 1281 return (EACCES); 1282 1283 /* 1284 * Move to the end of the lru list (end of lru == most recently used). 1285 */ 1286 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru); 1287 TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, nu_lru); 1288 1289 nickp = (u_int32_t *)malloc(2 * NFSX_UNSIGNED, M_TEMP, M_WAITOK); 1290 *nickp++ = txdr_unsigned(RPCAKN_NICKNAME); 1291 *nickp = txdr_unsigned(nuidp->nu_nickname); 1292 *auth_str = (char *)nickp; 1293 *auth_len = 2 * NFSX_UNSIGNED; 1294 1295 /* 1296 * Now we must encrypt the verifier and package it up. 1297 */ 1298 verfp = (u_int32_t *)verf_str; 1299 *verfp++ = txdr_unsigned(RPCAKN_NICKNAME); 1300 getmicrotime(&tv); 1301 if (tv.tv_sec > nuidp->nu_timestamp.tv_sec || 1302 (tv.tv_sec == nuidp->nu_timestamp.tv_sec && 1303 tv.tv_usec > nuidp->nu_timestamp.tv_usec)) 1304 nuidp->nu_timestamp = tv; 1305 else 1306 nuidp->nu_timestamp.tv_usec++; 1307 ktvin.tv_sec = txdr_unsigned(nuidp->nu_timestamp.tv_sec); 1308 ktvin.tv_usec = txdr_unsigned(nuidp->nu_timestamp.tv_usec); 1309 1310 /* 1311 * Now encrypt the timestamp verifier in ecb mode using the session 1312 * key. 1313 */ 1314 #ifdef NFSKERB 1315 XXX 1316 #endif 1317 1318 *verfp++ = ktvout.tv_sec; 1319 *verfp++ = ktvout.tv_usec; 1320 *verfp = 0; 1321 return (0); 1322 } 1323 1324 /* 1325 * Save the current nickname in a hash list entry on the mount point. 1326 */ 1327 int 1328 nfs_savenickauth(nmp, cred, len, key, mdp, dposp, mrep) 1329 struct nfsmount *nmp; 1330 kauth_cred_t cred; 1331 int len; 1332 NFSKERBKEY_T key; 1333 struct mbuf **mdp; 1334 char **dposp; 1335 struct mbuf *mrep; 1336 { 1337 struct nfsuid *nuidp; 1338 u_int32_t *tl; 1339 int32_t t1; 1340 struct mbuf *md = *mdp; 1341 struct timeval ktvin, ktvout; 1342 u_int32_t nick; 1343 char *dpos = *dposp, *cp2; 1344 int deltasec, error = 0; 1345 1346 memset(&ktvout, 0, sizeof ktvout); /* XXX gcc */ 1347 1348 if (len == (3 * NFSX_UNSIGNED)) { 1349 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 1350 ktvin.tv_sec = *tl++; 1351 ktvin.tv_usec = *tl++; 1352 nick = fxdr_unsigned(u_int32_t, *tl); 1353 1354 /* 1355 * Decrypt the timestamp in ecb mode. 1356 */ 1357 #ifdef NFSKERB 1358 XXX 1359 #endif 1360 ktvout.tv_sec = fxdr_unsigned(long, ktvout.tv_sec); 1361 ktvout.tv_usec = fxdr_unsigned(long, ktvout.tv_usec); 1362 deltasec = time_second - ktvout.tv_sec; 1363 if (deltasec < 0) 1364 deltasec = -deltasec; 1365 /* 1366 * If ok, add it to the hash list for the mount point. 1367 */ 1368 if (deltasec <= NFS_KERBCLOCKSKEW) { 1369 if (nmp->nm_numuids < nuidhash_max) { 1370 nmp->nm_numuids++; 1371 nuidp = (struct nfsuid *) 1372 malloc(sizeof (struct nfsuid), M_NFSUID, 1373 M_WAITOK); 1374 } else { 1375 nuidp = TAILQ_FIRST(&nmp->nm_uidlruhead); 1376 LIST_REMOVE(nuidp, nu_hash); 1377 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, 1378 nu_lru); 1379 } 1380 nuidp->nu_flag = 0; 1381 kauth_cred_seteuid(nuidp->nu_cr, kauth_cred_geteuid(cred)); 1382 nuidp->nu_expire = time_second + NFS_KERBTTL; 1383 nuidp->nu_timestamp = ktvout; 1384 nuidp->nu_nickname = nick; 1385 memcpy(nuidp->nu_key, key, sizeof (NFSKERBKEY_T)); 1386 TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, 1387 nu_lru); 1388 LIST_INSERT_HEAD(NMUIDHASH(nmp, kauth_cred_geteuid(cred)), 1389 nuidp, nu_hash); 1390 } 1391 } else 1392 nfsm_adv(nfsm_rndup(len)); 1393 nfsmout: 1394 *mdp = md; 1395 *dposp = dpos; 1396 return (error); 1397 } 1398 #endif /* NFS */ 1399
Indexes created Tue Oct 21 08:09:48 GMT 2025