nfs_syscalls.c revision 1.88.8.5
1 /* $NetBSD: nfs_syscalls.c,v 1.88.8.5 2006/03/12 17:15:15 elad 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 1.88.8.5 2006/03/12 17:15:15 elad 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 69 #include <sys/sa.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/nqnfs.h> 86 #include <nfs/nfsrtt.h> 87 #include <nfs/nfs_var.h> 88 89 /* Global defs. */ 90 extern int32_t (*nfsrv3_procs[NFS_NPROCS]) __P((struct nfsrv_descript *, 91 struct nfssvc_sock *, 92 struct lwp *, struct mbuf **)); 93 extern time_t nqnfsstarttime; 94 extern int nfsrvw_procrastinate; 95 96 struct nfssvc_sock *nfs_udpsock; 97 #ifdef ISO 98 struct nfssvc_sock *nfs_cltpsock; 99 #endif 100 #ifdef INET6 101 struct nfssvc_sock *nfs_udp6sock; 102 #endif 103 int nuidhash_max = NFS_MAXUIDHASH; 104 int nfsd_waiting = 0; 105 #ifdef NFSSERVER 106 static int nfs_numnfsd = 0; 107 static int notstarted = 1; 108 static int modify_flag = 0; 109 static struct nfsdrt nfsdrt; 110 #endif 111 112 #ifdef NFSSERVER 113 struct simplelock nfsd_slock = SIMPLELOCK_INITIALIZER; 114 struct nfssvc_sockhead nfssvc_sockhead; 115 struct nfssvc_sockhead nfssvc_sockpending; 116 struct nfsdhead nfsd_head; 117 struct nfsdidlehead nfsd_idle_head; 118 119 int nfssvc_sockhead_flag; 120 int nfsd_head_flag; 121 #endif 122 123 MALLOC_DEFINE(M_NFSUID, "NFS uid", "Nfs uid mapping structure"); 124 125 #ifdef NFS 126 struct nfs_iod nfs_asyncdaemon[NFS_MAXASYNCDAEMON]; 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(l, v, retval) 150 struct lwp *l; 151 void *v; 152 register_t *retval; 153 { 154 struct sys_nfssvc_args /* { 155 syscallarg(int) flag; 156 syscallarg(caddr_t) argp; 157 } */ *uap = v; 158 struct proc *p = l->l_proc; 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(p->p_cred, KAUTH_GENERIC_ISSUSER, 180 &p->p_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, p->p_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(p->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) == nsd->nsd_cr.cr_uid && 301 (!nfsd->nfsd_nd->nd_nam2 || 302 netaddr_match(NU_NETFAM(nuidp), 303 &nuidp->nu_haddr, nfsd->nfsd_nd->nd_nam2))) 304 break; 305 } 306 if (nuidp) { 307 nfsrv_setcred(nuidp->nu_cr, &nfsd->nfsd_nd->nd_cr); 308 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL; 309 } else { 310 /* 311 * Nope, so we will. 312 */ 313 if (slp->ns_numuids < nuidhash_max) { 314 slp->ns_numuids++; 315 nuidp = (struct nfsuid *) 316 malloc(sizeof (struct nfsuid), M_NFSUID, 317 M_WAITOK); 318 } else 319 nuidp = (struct nfsuid *)0; 320 if ((slp->ns_flag & SLP_VALID) == 0) { 321 if (nuidp) 322 free((caddr_t)nuidp, M_NFSUID); 323 } else { 324 if (nuidp == (struct nfsuid *)0) { 325 nuidp = TAILQ_FIRST(&slp->ns_uidlruhead); 326 LIST_REMOVE(nuidp, nu_hash); 327 TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, 328 nu_lru); 329 if (nuidp->nu_flag & NU_NAM) 330 m_freem(nuidp->nu_nam); 331 } 332 nuidp->nu_flag = 0; 333 kauth_cred_uucvt(nuidp->nu_cr, &nsd->nsd_cr); 334 #if 0 /* XXX elad - kernel auth makes sure this can't happen. */ 335 if (nuidp->nu_cr.cr_ngroups > NGROUPS) 336 nuidp->nu_cr.cr_ngroups = NGROUPS; 337 #endif /* XXX elad */ 338 nuidp->nu_timestamp = nsd->nsd_timestamp; 339 nuidp->nu_expire = time.tv_sec + nsd->nsd_ttl; 340 /* 341 * and save the session key in nu_key. 342 */ 343 memcpy(nuidp->nu_key, nsd->nsd_key, 344 sizeof(nsd->nsd_key)); 345 if (nfsd->nfsd_nd->nd_nam2) { 346 struct sockaddr_in *saddr; 347 348 saddr = mtod(nfsd->nfsd_nd->nd_nam2, 349 struct sockaddr_in *); 350 switch (saddr->sin_family) { 351 case AF_INET: 352 nuidp->nu_flag |= NU_INETADDR; 353 nuidp->nu_inetaddr = 354 saddr->sin_addr.s_addr; 355 break; 356 case AF_ISO: 357 default: 358 nuidp->nu_flag |= NU_NAM; 359 nuidp->nu_nam = m_copym( 360 nfsd->nfsd_nd->nd_nam2, 0, 361 M_COPYALL, M_WAIT); 362 break; 363 }; 364 } 365 TAILQ_INSERT_TAIL(&slp->ns_uidlruhead, nuidp, 366 nu_lru); 367 LIST_INSERT_HEAD(NUIDHASH(slp, nsd->nsd_uid), 368 nuidp, nu_hash); 369 nfsrv_setcred(nuidp->nu_cr, 370 &nfsd->nfsd_nd->nd_cr); 371 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL; 372 } 373 } 374 } 375 if ((SCARG(uap, flag) & NFSSVC_AUTHINFAIL) && 376 (nfsd = nsd->nsd_nfsd)) 377 nfsd->nfsd_flag |= NFSD_AUTHFAIL; 378 error = nfssvc_nfsd(nsd, SCARG(uap, argp), l); 379 #endif /* !NFSSERVER */ 380 } 381 if (error == EINTR || error == ERESTART) 382 error = 0; 383 return (error); 384 } 385 386 #ifdef NFSSERVER 387 MALLOC_DEFINE(M_NFSD, "NFS daemon", "Nfs server daemon structure"); 388 MALLOC_DEFINE(M_NFSSVC, "NFS srvsock", "Nfs server structure"); 389 struct pool nfs_srvdesc_pool; 390 391 static struct nfssvc_sock * 392 nfsrv_sockalloc() 393 { 394 struct nfssvc_sock *slp; 395 int s; 396 397 slp = (struct nfssvc_sock *) 398 malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK); 399 memset(slp, 0, sizeof (struct nfssvc_sock)); 400 simple_lock_init(&slp->ns_lock); 401 TAILQ_INIT(&slp->ns_uidlruhead); 402 LIST_INIT(&slp->ns_tq); 403 SIMPLEQ_INIT(&slp->ns_sendq); 404 s = splsoftnet(); 405 simple_lock(&nfsd_slock); 406 TAILQ_INSERT_TAIL(&nfssvc_sockhead, slp, ns_chain); 407 simple_unlock(&nfsd_slock); 408 splx(s); 409 410 return slp; 411 } 412 413 static void 414 nfsrv_sockfree(struct nfssvc_sock *slp) 415 { 416 417 KASSERT(slp->ns_so == NULL); 418 KASSERT(slp->ns_fp == NULL); 419 KASSERT((slp->ns_flag & SLP_VALID) == 0); 420 free(slp, M_NFSSVC); 421 } 422 423 /* 424 * Adds a socket to the list for servicing by nfsds. 425 */ 426 int 427 nfssvc_addsock(fp, mynam) 428 struct file *fp; 429 struct mbuf *mynam; 430 { 431 struct mbuf *m; 432 int siz; 433 struct nfssvc_sock *slp; 434 struct socket *so; 435 struct nfssvc_sock *tslp; 436 int error, s; 437 438 so = (struct socket *)fp->f_data; 439 tslp = (struct nfssvc_sock *)0; 440 /* 441 * Add it to the list, as required. 442 */ 443 if (so->so_proto->pr_protocol == IPPROTO_UDP) { 444 #ifdef INET6 445 if (so->so_proto->pr_domain->dom_family == AF_INET6) 446 tslp = nfs_udp6sock; 447 else 448 #endif 449 tslp = nfs_udpsock; 450 if (tslp->ns_flag & SLP_VALID) { 451 m_freem(mynam); 452 return (EPERM); 453 } 454 #ifdef ISO 455 } else if (so->so_proto->pr_protocol == ISOPROTO_CLTP) { 456 tslp = nfs_cltpsock; 457 if (tslp->ns_flag & SLP_VALID) { 458 m_freem(mynam); 459 return (EPERM); 460 } 461 #endif /* ISO */ 462 } 463 if (so->so_type == SOCK_STREAM) 464 siz = NFS_MAXPACKET + sizeof (u_long); 465 else 466 siz = NFS_MAXPACKET; 467 error = soreserve(so, siz, siz); 468 if (error) { 469 m_freem(mynam); 470 return (error); 471 } 472 473 /* 474 * Set protocol specific options { for now TCP only } and 475 * reserve some space. For datagram sockets, this can get called 476 * repeatedly for the same socket, but that isn't harmful. 477 */ 478 if (so->so_type == SOCK_STREAM) { 479 m = m_get(M_WAIT, MT_SOOPTS); 480 MCLAIM(m, &nfs_mowner); 481 *mtod(m, int32_t *) = 1; 482 m->m_len = sizeof(int32_t); 483 sosetopt(so, SOL_SOCKET, SO_KEEPALIVE, m); 484 } 485 if ((so->so_proto->pr_domain->dom_family == AF_INET 486 #ifdef INET6 487 || so->so_proto->pr_domain->dom_family == AF_INET6 488 #endif 489 ) && 490 so->so_proto->pr_protocol == IPPROTO_TCP) { 491 m = m_get(M_WAIT, MT_SOOPTS); 492 MCLAIM(m, &nfs_mowner); 493 *mtod(m, int32_t *) = 1; 494 m->m_len = sizeof(int32_t); 495 sosetopt(so, IPPROTO_TCP, TCP_NODELAY, m); 496 } 497 so->so_rcv.sb_flags &= ~SB_NOINTR; 498 so->so_rcv.sb_timeo = 0; 499 so->so_snd.sb_flags &= ~SB_NOINTR; 500 so->so_snd.sb_timeo = 0; 501 if (tslp) 502 slp = tslp; 503 else { 504 slp = nfsrv_sockalloc(); 505 } 506 slp->ns_so = so; 507 slp->ns_nam = mynam; 508 fp->f_count++; 509 slp->ns_fp = fp; 510 s = splsoftnet(); 511 so->so_upcallarg = (caddr_t)slp; 512 so->so_upcall = nfsrv_rcv; 513 so->so_rcv.sb_flags |= SB_UPCALL; 514 slp->ns_flag = (SLP_VALID | SLP_NEEDQ); 515 nfsrv_wakenfsd(slp); 516 splx(s); 517 return (0); 518 } 519 520 /* 521 * Called by nfssvc() for nfsds. Just loops around servicing rpc requests 522 * until it is killed by a signal. 523 */ 524 int 525 nfssvc_nfsd(nsd, argp, l) 526 struct nfsd_srvargs *nsd; 527 caddr_t argp; 528 struct lwp *l; 529 { 530 struct mbuf *m; 531 int siz; 532 struct nfssvc_sock *slp; 533 struct nfsd *nfsd = nsd->nsd_nfsd; 534 struct nfsrv_descript *nd = NULL; 535 struct mbuf *mreq; 536 int error = 0, cacherep, s, sotype, writes_todo; 537 u_quad_t cur_usec; 538 struct proc *p = l->l_proc; 539 540 #ifndef nolint 541 cacherep = RC_DOIT; 542 writes_todo = 0; 543 #endif 544 s = splsoftnet(); 545 if (nfsd == (struct nfsd *)0) { 546 nsd->nsd_nfsd = nfsd = (struct nfsd *) 547 malloc(sizeof (struct nfsd), M_NFSD, M_WAITOK); 548 memset((caddr_t)nfsd, 0, sizeof (struct nfsd)); 549 nfsd->nfsd_procp = p; 550 simple_lock(&nfsd_slock); 551 TAILQ_INSERT_TAIL(&nfsd_head, nfsd, nfsd_chain); 552 nfs_numnfsd++; 553 simple_unlock(&nfsd_slock); 554 } 555 PHOLD(l); 556 /* 557 * Loop getting rpc requests until SIGKILL. 558 */ 559 for (;;) { 560 if (nfsd->nfsd_slp == NULL) { 561 simple_lock(&nfsd_slock); 562 while (nfsd->nfsd_slp == NULL && 563 (nfsd_head_flag & NFSD_CHECKSLP) == 0) { 564 SLIST_INSERT_HEAD(&nfsd_idle_head, nfsd, 565 nfsd_idle); 566 nfsd_waiting++; 567 error = ltsleep(nfsd, PSOCK | PCATCH, "nfsd", 568 0, &nfsd_slock); 569 nfsd_waiting--; 570 if (error) { 571 slp = nfsd->nfsd_slp; 572 nfsd->nfsd_slp = NULL; 573 if (!slp) 574 SLIST_REMOVE(&nfsd_idle_head, 575 nfsd, nfsd, nfsd_idle); 576 simple_unlock(&nfsd_slock); 577 if (slp) { 578 nfsrv_wakenfsd(slp); 579 nfsrv_slpderef(slp); 580 } 581 goto done; 582 } 583 } 584 if (nfsd->nfsd_slp == NULL && 585 (nfsd_head_flag & NFSD_CHECKSLP) != 0) { 586 slp = TAILQ_FIRST(&nfssvc_sockpending); 587 if (slp) { 588 KASSERT((slp->ns_flag & 589 (SLP_VALID | SLP_DOREC)) 590 == (SLP_VALID | SLP_DOREC)); 591 TAILQ_REMOVE(&nfssvc_sockpending, slp, 592 ns_pending); 593 slp->ns_flag &= ~SLP_DOREC; 594 slp->ns_sref++; 595 nfsd->nfsd_slp = slp; 596 } else 597 nfsd_head_flag &= ~NFSD_CHECKSLP; 598 } 599 simple_unlock(&nfsd_slock); 600 if ((slp = nfsd->nfsd_slp) == NULL) 601 continue; 602 if (slp->ns_flag & SLP_VALID) { 603 if (slp->ns_flag & SLP_DISCONN) 604 nfsrv_zapsock(slp); 605 else if ((slp->ns_flag & SLP_NEEDQ) != 0) { 606 nfsrv_rcv(slp->ns_so, (void *)slp, 607 M_WAIT); 608 } 609 error = nfsrv_dorec(slp, nfsd, &nd); 610 cur_usec = (u_quad_t)time.tv_sec * 1000000 + 611 (u_quad_t)time.tv_usec; 612 if (error && LIST_FIRST(&slp->ns_tq) && 613 LIST_FIRST(&slp->ns_tq)->nd_time <= 614 cur_usec) { 615 error = 0; 616 cacherep = RC_DOIT; 617 writes_todo = 1; 618 } else 619 writes_todo = 0; 620 if (error == 0 && slp->ns_rec != NULL) { 621 nfsrv_wakenfsd(slp); 622 } 623 } 624 } else { 625 error = 0; 626 slp = nfsd->nfsd_slp; 627 } 628 if (error || (slp->ns_flag & SLP_VALID) == 0) { 629 if (nd) { 630 pool_put(&nfs_srvdesc_pool, nd); 631 nd = NULL; 632 } 633 nfsd->nfsd_slp = NULL; 634 nfsrv_slpderef(slp); 635 continue; 636 } 637 splx(s); 638 sotype = slp->ns_so->so_type; 639 if (nd) { 640 nd->nd_starttime = time; 641 if (nd->nd_nam2) 642 nd->nd_nam = nd->nd_nam2; 643 else 644 nd->nd_nam = slp->ns_nam; 645 646 /* 647 * Check to see if authorization is needed. 648 */ 649 if (nfsd->nfsd_flag & NFSD_NEEDAUTH) { 650 nfsd->nfsd_flag &= ~NFSD_NEEDAUTH; 651 nsd->nsd_haddr = mtod(nd->nd_nam, 652 struct sockaddr_in *)->sin_addr.s_addr; 653 nsd->nsd_authlen = nfsd->nfsd_authlen; 654 nsd->nsd_verflen = nfsd->nfsd_verflen; 655 if (!copyout(nfsd->nfsd_authstr, 656 nsd->nsd_authstr, nfsd->nfsd_authlen) && 657 !copyout(nfsd->nfsd_verfstr, 658 nsd->nsd_verfstr, nfsd->nfsd_verflen) && 659 !copyout(nsd, argp, sizeof (*nsd))) { 660 PRELE(l); 661 return (ENEEDAUTH); 662 } 663 cacherep = RC_DROPIT; 664 } else 665 cacherep = nfsrv_getcache(nd, slp, &mreq); 666 667 /* 668 * Check for just starting up for NQNFS and send 669 * fake "try again later" replies to the NQNFS clients. 670 */ 671 if (notstarted && nqnfsstarttime <= time.tv_sec) { 672 if (modify_flag) { 673 nqnfsstarttime = 674 time.tv_sec + nqsrv_writeslack; 675 modify_flag = 0; 676 } else 677 notstarted = 0; 678 } 679 if (notstarted) { 680 if ((nd->nd_flag & ND_NQNFS) == 0) 681 cacherep = RC_DROPIT; 682 else if (nd->nd_procnum != NFSPROC_WRITE) { 683 nd->nd_procnum = NFSPROC_NOOP; 684 nd->nd_repstat = NQNFS_TRYLATER; 685 cacherep = RC_DOIT; 686 } else 687 modify_flag = 1; 688 } else if (nfsd->nfsd_flag & NFSD_AUTHFAIL) { 689 nfsd->nfsd_flag &= ~NFSD_AUTHFAIL; 690 nd->nd_procnum = NFSPROC_NOOP; 691 nd->nd_repstat = 692 (NFSERR_AUTHERR | AUTH_TOOWEAK); 693 cacherep = RC_DOIT; 694 } 695 } 696 697 /* 698 * Loop to get all the write rpc relies that have been 699 * gathered together. 700 */ 701 do { 702 #ifdef DIAGNOSTIC 703 int lockcount; 704 #endif 705 switch (cacherep) { 706 case RC_DOIT: 707 #ifdef DIAGNOSTIC 708 /* 709 * NFS server procs should neither release 710 * locks already held, nor leave things 711 * locked. Catch this sooner, rather than 712 * later (when we try to relock something we 713 * already have locked). Careful inspection 714 * of the failing routine usually turns up the 715 * lock leak.. once we know what it is.. 716 */ 717 lockcount = l->l_locks; 718 #endif 719 mreq = NULL; 720 netexport_rdlock(); 721 if (writes_todo || (!(nd->nd_flag & ND_NFSV3) && 722 nd->nd_procnum == NFSPROC_WRITE && 723 nfsrvw_procrastinate > 0 && !notstarted)) 724 error = nfsrv_writegather(&nd, slp, 725 l, &mreq); 726 else 727 error = 728 (*(nfsrv3_procs[nd->nd_procnum])) 729 (nd, slp, l, &mreq); 730 netexport_rdunlock(); 731 #ifdef DIAGNOSTIC 732 if (l->l_locks != lockcount) { 733 /* 734 * If you see this panic, audit 735 * nfsrv3_procs[nd->nd_procnum] for 736 * vnode locking errors (usually, it's 737 * due to forgetting to vput() 738 * something). 739 */ 740 #ifdef DEBUG 741 extern void printlockedvnodes(void); 742 printlockedvnodes(); 743 #endif 744 printf("nfsd: locking botch in op %d" 745 " (before %d, after %d)\n", 746 nd ? nd->nd_procnum : -1, 747 lockcount, l->l_locks); 748 } 749 #endif 750 if (mreq == NULL) { 751 if (nd != NULL) { 752 if (nd->nd_nam2) 753 m_free(nd->nd_nam2); 754 if (nd->nd_mrep) 755 m_freem(nd->nd_mrep); 756 } 757 break; 758 } 759 if (error) { 760 if (nd->nd_procnum != NQNFSPROC_VACATED) 761 nfsstats.srv_errs++; 762 nfsrv_updatecache(nd, FALSE, mreq); 763 if (nd->nd_nam2) 764 m_freem(nd->nd_nam2); 765 break; 766 } 767 nfsstats.srvrpccnt[nd->nd_procnum]++; 768 nfsrv_updatecache(nd, TRUE, mreq); 769 nd->nd_mrep = (struct mbuf *)0; 770 case RC_REPLY: 771 m = mreq; 772 siz = 0; 773 while (m) { 774 siz += m->m_len; 775 m = m->m_next; 776 } 777 if (siz <= 0 || siz > NFS_MAXPACKET) { 778 printf("mbuf siz=%d\n",siz); 779 panic("Bad nfs svc reply"); 780 } 781 m = mreq; 782 m->m_pkthdr.len = siz; 783 m->m_pkthdr.rcvif = (struct ifnet *)0; 784 /* 785 * For stream protocols, prepend a Sun RPC 786 * Record Mark. 787 */ 788 if (sotype == SOCK_STREAM) { 789 M_PREPEND(m, NFSX_UNSIGNED, M_WAIT); 790 *mtod(m, u_int32_t *) = 791 htonl(0x80000000 | siz); 792 } 793 nd->nd_mreq = m; 794 if (nfsrtton) { 795 nfsd_rt(slp->ns_so->so_type, nd, 796 cacherep); 797 } 798 s = splsoftnet(); 799 error = nfsdsock_sendreply(slp, nd); 800 nd = NULL; 801 if (error == EPIPE) 802 nfsrv_zapsock(slp); 803 if (error == EINTR || error == ERESTART) { 804 nfsrv_slpderef(slp); 805 goto done; 806 } 807 splx(s); 808 break; 809 case RC_DROPIT: 810 if (nfsrtton) 811 nfsd_rt(sotype, nd, cacherep); 812 m_freem(nd->nd_mrep); 813 m_freem(nd->nd_nam2); 814 break; 815 } 816 if (nd) { 817 pool_put(&nfs_srvdesc_pool, nd); 818 nd = NULL; 819 } 820 821 /* 822 * Check to see if there are outstanding writes that 823 * need to be serviced. 824 */ 825 cur_usec = (u_quad_t)time.tv_sec * 1000000 + 826 (u_quad_t)time.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 pool_put(&nfs_srvdesc_pool, 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 drt *rt; 1017 1018 rt = &nfsdrt.drt[nfsdrt.pos]; 1019 if (cacherep == RC_DOIT) 1020 rt->flag = 0; 1021 else if (cacherep == RC_REPLY) 1022 rt->flag = DRT_CACHEREPLY; 1023 else 1024 rt->flag = DRT_CACHEDROP; 1025 if (sotype == SOCK_STREAM) 1026 rt->flag |= DRT_TCP; 1027 if (nd->nd_flag & ND_NQNFS) 1028 rt->flag |= DRT_NQNFS; 1029 else if (nd->nd_flag & ND_NFSV3) 1030 rt->flag |= DRT_NFSV3; 1031 rt->proc = nd->nd_procnum; 1032 if (mtod(nd->nd_nam, struct sockaddr *)->sa_family == AF_INET) 1033 rt->ipadr = mtod(nd->nd_nam, struct sockaddr_in *)->sin_addr.s_addr; 1034 else 1035 rt->ipadr = INADDR_ANY; 1036 rt->resptime = ((time.tv_sec - nd->nd_starttime.tv_sec) * 1000000) + 1037 (time.tv_usec - nd->nd_starttime.tv_usec); 1038 rt->tstamp = time; 1039 nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ; 1040 } 1041 #endif /* NFSSERVER */ 1042 1043 #ifdef NFS 1044 1045 int nfs_defect = 0; 1046 /* 1047 * Asynchronous I/O threads for client nfs. 1048 * They do read-ahead and write-behind operations on the block I/O cache. 1049 * Never returns unless it fails or gets killed. 1050 */ 1051 1052 int 1053 nfssvc_iod(l) 1054 struct lwp *l; 1055 { 1056 struct buf *bp; 1057 int i; 1058 struct nfs_iod *myiod; 1059 struct nfsmount *nmp; 1060 int error = 0; 1061 struct proc *p = l ? l->l_proc : NULL; 1062 1063 /* 1064 * Assign my position or return error if too many already running 1065 */ 1066 myiod = NULL; 1067 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) 1068 if (nfs_asyncdaemon[i].nid_proc == NULL) { 1069 myiod = &nfs_asyncdaemon[i]; 1070 break; 1071 } 1072 if (myiod == NULL) 1073 return (EBUSY); 1074 myiod->nid_proc = p; 1075 nfs_numasync++; 1076 PHOLD(l); 1077 /* 1078 * Just loop around doing our stuff until SIGKILL 1079 */ 1080 for (;;) { 1081 while (/*CONSTCOND*/ TRUE) { 1082 simple_lock(&myiod->nid_slock); 1083 nmp = myiod->nid_mount; 1084 if (nmp) { 1085 simple_lock(&nmp->nm_slock); 1086 if (!TAILQ_EMPTY(&nmp->nm_bufq)) { 1087 simple_unlock(&myiod->nid_slock); 1088 break; 1089 } 1090 nmp->nm_bufqiods--; 1091 simple_unlock(&nmp->nm_slock); 1092 } 1093 myiod->nid_want = p; 1094 myiod->nid_mount = NULL; 1095 error = ltsleep(&myiod->nid_want, 1096 PWAIT | PCATCH | PNORELOCK, "nfsidl", 0, 1097 &myiod->nid_slock); 1098 if (error) 1099 goto quit; 1100 } 1101 1102 while ((bp = TAILQ_FIRST(&nmp->nm_bufq)) != NULL) { 1103 /* Take one off the front of the list */ 1104 TAILQ_REMOVE(&nmp->nm_bufq, bp, b_freelist); 1105 nmp->nm_bufqlen--; 1106 if (nmp->nm_bufqwant && 1107 nmp->nm_bufqlen < 2 * nfs_numasync) { 1108 nmp->nm_bufqwant = FALSE; 1109 wakeup(&nmp->nm_bufq); 1110 } 1111 simple_unlock(&nmp->nm_slock); 1112 (void)nfs_doio(bp); 1113 simple_lock(&nmp->nm_slock); 1114 /* 1115 * If there are more than one iod on this mount, 1116 * then defect so that the iods can be shared out 1117 * fairly between the mounts 1118 */ 1119 if (nfs_defect && nmp->nm_bufqiods > 1) { 1120 myiod->nid_mount = NULL; 1121 nmp->nm_bufqiods--; 1122 break; 1123 } 1124 } 1125 simple_unlock(&nmp->nm_slock); 1126 } 1127 quit: 1128 PRELE(l); 1129 if (nmp) 1130 nmp->nm_bufqiods--; 1131 myiod->nid_want = NULL; 1132 myiod->nid_mount = NULL; 1133 myiod->nid_proc = NULL; 1134 nfs_numasync--; 1135 1136 return error; 1137 } 1138 1139 void 1140 nfs_iodinit() 1141 { 1142 int i; 1143 1144 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) 1145 simple_lock_init(&nfs_asyncdaemon[i].nid_slock); 1146 } 1147 1148 void 1149 start_nfsio(arg) 1150 void *arg; 1151 { 1152 nfssvc_iod(curlwp); 1153 1154 kthread_exit(0); 1155 } 1156 1157 void 1158 nfs_getset_niothreads(set) 1159 int set; 1160 { 1161 int i, have, start; 1162 1163 for (have = 0, i = 0; i < NFS_MAXASYNCDAEMON; i++) 1164 if (nfs_asyncdaemon[i].nid_proc != NULL) 1165 have++; 1166 1167 if (set) { 1168 /* clamp to sane range */ 1169 nfs_niothreads = max(0, min(nfs_niothreads, NFS_MAXASYNCDAEMON)); 1170 1171 start = nfs_niothreads - have; 1172 1173 while (start > 0) { 1174 kthread_create1(start_nfsio, NULL, NULL, "nfsio"); 1175 start--; 1176 } 1177 1178 for (i = 0; (start < 0) && (i < NFS_MAXASYNCDAEMON); i++) 1179 if (nfs_asyncdaemon[i].nid_proc != NULL) { 1180 psignal(nfs_asyncdaemon[i].nid_proc, SIGKILL); 1181 start++; 1182 } 1183 } else { 1184 if (nfs_niothreads >= 0) 1185 nfs_niothreads = have; 1186 } 1187 } 1188 1189 /* 1190 * Get an authorization string for the uid by having the mount_nfs sitting 1191 * on this mount point porpous out of the kernel and do it. 1192 */ 1193 int 1194 nfs_getauth(nmp, rep, cred, auth_str, auth_len, verf_str, verf_len, key) 1195 struct nfsmount *nmp; 1196 struct nfsreq *rep; 1197 kauth_cred_t cred; 1198 char **auth_str; 1199 int *auth_len; 1200 char *verf_str; 1201 int *verf_len; 1202 NFSKERBKEY_T key; /* return session key */ 1203 { 1204 int error = 0; 1205 1206 while ((nmp->nm_iflag & NFSMNT_WAITAUTH) == 0) { 1207 nmp->nm_iflag |= NFSMNT_WANTAUTH; 1208 (void) tsleep((caddr_t)&nmp->nm_authtype, PSOCK, 1209 "nfsauth1", 2 * hz); 1210 error = nfs_sigintr(nmp, rep, rep->r_lwp); 1211 if (error) { 1212 nmp->nm_iflag &= ~NFSMNT_WANTAUTH; 1213 return (error); 1214 } 1215 } 1216 nmp->nm_iflag &= ~(NFSMNT_WAITAUTH | NFSMNT_WANTAUTH); 1217 nmp->nm_authstr = *auth_str = (char *)malloc(RPCAUTH_MAXSIZ, M_TEMP, M_WAITOK); 1218 nmp->nm_authlen = RPCAUTH_MAXSIZ; 1219 nmp->nm_verfstr = verf_str; 1220 nmp->nm_verflen = *verf_len; 1221 nmp->nm_authuid = kauth_cred_geteuid(cred); 1222 wakeup((caddr_t)&nmp->nm_authstr); 1223 1224 /* 1225 * And wait for mount_nfs to do its stuff. 1226 */ 1227 while ((nmp->nm_iflag & NFSMNT_HASAUTH) == 0 && error == 0) { 1228 (void) tsleep((caddr_t)&nmp->nm_authlen, PSOCK, 1229 "nfsauth2", 2 * hz); 1230 error = nfs_sigintr(nmp, rep, rep->r_lwp); 1231 } 1232 if (nmp->nm_iflag & NFSMNT_AUTHERR) { 1233 nmp->nm_iflag &= ~NFSMNT_AUTHERR; 1234 error = EAUTH; 1235 } 1236 if (error) 1237 free((caddr_t)*auth_str, M_TEMP); 1238 else { 1239 *auth_len = nmp->nm_authlen; 1240 *verf_len = nmp->nm_verflen; 1241 memcpy(key, nmp->nm_key, sizeof (NFSKERBKEY_T)); 1242 } 1243 nmp->nm_iflag &= ~NFSMNT_HASAUTH; 1244 nmp->nm_iflag |= NFSMNT_WAITAUTH; 1245 if (nmp->nm_iflag & NFSMNT_WANTAUTH) { 1246 nmp->nm_iflag &= ~NFSMNT_WANTAUTH; 1247 wakeup((caddr_t)&nmp->nm_authtype); 1248 } 1249 return (error); 1250 } 1251 1252 /* 1253 * Get a nickname authenticator and verifier. 1254 */ 1255 int 1256 nfs_getnickauth(nmp, cred, auth_str, auth_len, verf_str, verf_len) 1257 struct nfsmount *nmp; 1258 kauth_cred_t cred; 1259 char **auth_str; 1260 int *auth_len; 1261 char *verf_str; 1262 int verf_len; 1263 { 1264 struct nfsuid *nuidp; 1265 u_int32_t *nickp, *verfp; 1266 struct timeval ktvin, ktvout; 1267 1268 #ifdef DIAGNOSTIC 1269 if (verf_len < (4 * NFSX_UNSIGNED)) 1270 panic("nfs_getnickauth verf too small"); 1271 #endif 1272 LIST_FOREACH(nuidp, NMUIDHASH(nmp, kauth_cred_geteuid(cred)), nu_hash) { 1273 if (kauth_cred_geteuid(nuidp->nu_cr) == kauth_cred_geteuid(cred)) 1274 break; 1275 } 1276 if (!nuidp || nuidp->nu_expire < time.tv_sec) 1277 return (EACCES); 1278 1279 /* 1280 * Move to the end of the lru list (end of lru == most recently used). 1281 */ 1282 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru); 1283 TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, nu_lru); 1284 1285 nickp = (u_int32_t *)malloc(2 * NFSX_UNSIGNED, M_TEMP, M_WAITOK); 1286 *nickp++ = txdr_unsigned(RPCAKN_NICKNAME); 1287 *nickp = txdr_unsigned(nuidp->nu_nickname); 1288 *auth_str = (char *)nickp; 1289 *auth_len = 2 * NFSX_UNSIGNED; 1290 1291 /* 1292 * Now we must encrypt the verifier and package it up. 1293 */ 1294 verfp = (u_int32_t *)verf_str; 1295 *verfp++ = txdr_unsigned(RPCAKN_NICKNAME); 1296 if (time.tv_sec > nuidp->nu_timestamp.tv_sec || 1297 (time.tv_sec == nuidp->nu_timestamp.tv_sec && 1298 time.tv_usec > nuidp->nu_timestamp.tv_usec)) 1299 nuidp->nu_timestamp = time; 1300 else 1301 nuidp->nu_timestamp.tv_usec++; 1302 ktvin.tv_sec = txdr_unsigned(nuidp->nu_timestamp.tv_sec); 1303 ktvin.tv_usec = txdr_unsigned(nuidp->nu_timestamp.tv_usec); 1304 1305 /* 1306 * Now encrypt the timestamp verifier in ecb mode using the session 1307 * key. 1308 */ 1309 #ifdef NFSKERB 1310 XXX 1311 #endif 1312 1313 *verfp++ = ktvout.tv_sec; 1314 *verfp++ = ktvout.tv_usec; 1315 *verfp = 0; 1316 return (0); 1317 } 1318 1319 /* 1320 * Save the current nickname in a hash list entry on the mount point. 1321 */ 1322 int 1323 nfs_savenickauth(nmp, cred, len, key, mdp, dposp, mrep) 1324 struct nfsmount *nmp; 1325 kauth_cred_t cred; 1326 int len; 1327 NFSKERBKEY_T key; 1328 struct mbuf **mdp; 1329 char **dposp; 1330 struct mbuf *mrep; 1331 { 1332 struct nfsuid *nuidp; 1333 u_int32_t *tl; 1334 int32_t t1; 1335 struct mbuf *md = *mdp; 1336 struct timeval ktvin, ktvout; 1337 u_int32_t nick; 1338 char *dpos = *dposp, *cp2; 1339 int deltasec, error = 0; 1340 1341 if (len == (3 * NFSX_UNSIGNED)) { 1342 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 1343 ktvin.tv_sec = *tl++; 1344 ktvin.tv_usec = *tl++; 1345 nick = fxdr_unsigned(u_int32_t, *tl); 1346 1347 /* 1348 * Decrypt the timestamp in ecb mode. 1349 */ 1350 #ifdef NFSKERB 1351 XXX 1352 #endif 1353 ktvout.tv_sec = fxdr_unsigned(long, ktvout.tv_sec); 1354 ktvout.tv_usec = fxdr_unsigned(long, ktvout.tv_usec); 1355 deltasec = time.tv_sec - ktvout.tv_sec; 1356 if (deltasec < 0) 1357 deltasec = -deltasec; 1358 /* 1359 * If ok, add it to the hash list for the mount point. 1360 */ 1361 if (deltasec <= NFS_KERBCLOCKSKEW) { 1362 if (nmp->nm_numuids < nuidhash_max) { 1363 nmp->nm_numuids++; 1364 nuidp = (struct nfsuid *) 1365 malloc(sizeof (struct nfsuid), M_NFSUID, 1366 M_WAITOK); 1367 } else { 1368 nuidp = TAILQ_FIRST(&nmp->nm_uidlruhead); 1369 LIST_REMOVE(nuidp, nu_hash); 1370 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, 1371 nu_lru); 1372 } 1373 nuidp->nu_flag = 0; 1374 kauth_cred_seteuid(nuidp->nu_cr, kauth_cred_geteuid(cred)); 1375 nuidp->nu_expire = time.tv_sec + NFS_KERBTTL; 1376 nuidp->nu_timestamp = ktvout; 1377 nuidp->nu_nickname = nick; 1378 memcpy(nuidp->nu_key, key, sizeof (NFSKERBKEY_T)); 1379 TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, 1380 nu_lru); 1381 LIST_INSERT_HEAD(NMUIDHASH(nmp, kauth_cred_geteuid(cred)), 1382 nuidp, nu_hash); 1383 } 1384 } else 1385 nfsm_adv(nfsm_rndup(len)); 1386 nfsmout: 1387 *mdp = md; 1388 *dposp = dpos; 1389 return (error); 1390 } 1391 #endif /* NFS */ 1392
Indexes created Mon Oct 20 20:10:13 GMT 2025