nfs_syscalls.c revision 1.88.8.1
1 /* $NetBSD: nfs_syscalls.c,v 1.88.8.1 2006/03/08 01:06:28 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 1.88.8.1 2006/03/08 01:06:28 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 = generic_authorize(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_convert(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 kauth_cred_setrefcnt(nuidp->nu_cr, 1); 339 nuidp->nu_timestamp = nsd->nsd_timestamp; 340 nuidp->nu_expire = time.tv_sec + nsd->nsd_ttl; 341 /* 342 * and save the session key in nu_key. 343 */ 344 memcpy(nuidp->nu_key, nsd->nsd_key, 345 sizeof(nsd->nsd_key)); 346 if (nfsd->nfsd_nd->nd_nam2) { 347 struct sockaddr_in *saddr; 348 349 saddr = mtod(nfsd->nfsd_nd->nd_nam2, 350 struct sockaddr_in *); 351 switch (saddr->sin_family) { 352 case AF_INET: 353 nuidp->nu_flag |= NU_INETADDR; 354 nuidp->nu_inetaddr = 355 saddr->sin_addr.s_addr; 356 break; 357 case AF_ISO: 358 default: 359 nuidp->nu_flag |= NU_NAM; 360 nuidp->nu_nam = m_copym( 361 nfsd->nfsd_nd->nd_nam2, 0, 362 M_COPYALL, M_WAIT); 363 break; 364 }; 365 } 366 TAILQ_INSERT_TAIL(&slp->ns_uidlruhead, nuidp, 367 nu_lru); 368 LIST_INSERT_HEAD(NUIDHASH(slp, nsd->nsd_uid), 369 nuidp, nu_hash); 370 nfsrv_setcred(nuidp->nu_cr, 371 nfsd->nfsd_nd->nd_cr); 372 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL; 373 } 374 } 375 } 376 if ((SCARG(uap, flag) & NFSSVC_AUTHINFAIL) && 377 (nfsd = nsd->nsd_nfsd)) 378 nfsd->nfsd_flag |= NFSD_AUTHFAIL; 379 error = nfssvc_nfsd(nsd, SCARG(uap, argp), l); 380 #endif /* !NFSSERVER */ 381 } 382 if (error == EINTR || error == ERESTART) 383 error = 0; 384 return (error); 385 } 386 387 #ifdef NFSSERVER 388 MALLOC_DEFINE(M_NFSD, "NFS daemon", "Nfs server daemon structure"); 389 MALLOC_DEFINE(M_NFSSVC, "NFS srvsock", "Nfs server structure"); 390 struct pool nfs_srvdesc_pool; 391 392 static struct nfssvc_sock * 393 nfsrv_sockalloc() 394 { 395 struct nfssvc_sock *slp; 396 int s; 397 398 slp = (struct nfssvc_sock *) 399 malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK); 400 memset(slp, 0, sizeof (struct nfssvc_sock)); 401 simple_lock_init(&slp->ns_lock); 402 TAILQ_INIT(&slp->ns_uidlruhead); 403 LIST_INIT(&slp->ns_tq); 404 SIMPLEQ_INIT(&slp->ns_sendq); 405 s = splsoftnet(); 406 simple_lock(&nfsd_slock); 407 TAILQ_INSERT_TAIL(&nfssvc_sockhead, slp, ns_chain); 408 simple_unlock(&nfsd_slock); 409 splx(s); 410 411 return slp; 412 } 413 414 static void 415 nfsrv_sockfree(struct nfssvc_sock *slp) 416 { 417 418 KASSERT(slp->ns_so == NULL); 419 KASSERT(slp->ns_fp == NULL); 420 KASSERT((slp->ns_flag & SLP_VALID) == 0); 421 free(slp, M_NFSSVC); 422 } 423 424 /* 425 * Adds a socket to the list for servicing by nfsds. 426 */ 427 int 428 nfssvc_addsock(fp, mynam) 429 struct file *fp; 430 struct mbuf *mynam; 431 { 432 struct mbuf *m; 433 int siz; 434 struct nfssvc_sock *slp; 435 struct socket *so; 436 struct nfssvc_sock *tslp; 437 int error, s; 438 439 so = (struct socket *)fp->f_data; 440 tslp = (struct nfssvc_sock *)0; 441 /* 442 * Add it to the list, as required. 443 */ 444 if (so->so_proto->pr_protocol == IPPROTO_UDP) { 445 #ifdef INET6 446 if (so->so_proto->pr_domain->dom_family == AF_INET6) 447 tslp = nfs_udp6sock; 448 else 449 #endif 450 tslp = nfs_udpsock; 451 if (tslp->ns_flag & SLP_VALID) { 452 m_freem(mynam); 453 return (EPERM); 454 } 455 #ifdef ISO 456 } else if (so->so_proto->pr_protocol == ISOPROTO_CLTP) { 457 tslp = nfs_cltpsock; 458 if (tslp->ns_flag & SLP_VALID) { 459 m_freem(mynam); 460 return (EPERM); 461 } 462 #endif /* ISO */ 463 } 464 if (so->so_type == SOCK_STREAM) 465 siz = NFS_MAXPACKET + sizeof (u_long); 466 else 467 siz = NFS_MAXPACKET; 468 error = soreserve(so, siz, siz); 469 if (error) { 470 m_freem(mynam); 471 return (error); 472 } 473 474 /* 475 * Set protocol specific options { for now TCP only } and 476 * reserve some space. For datagram sockets, this can get called 477 * repeatedly for the same socket, but that isn't harmful. 478 */ 479 if (so->so_type == SOCK_STREAM) { 480 m = m_get(M_WAIT, MT_SOOPTS); 481 MCLAIM(m, &nfs_mowner); 482 *mtod(m, int32_t *) = 1; 483 m->m_len = sizeof(int32_t); 484 sosetopt(so, SOL_SOCKET, SO_KEEPALIVE, m); 485 } 486 if ((so->so_proto->pr_domain->dom_family == AF_INET 487 #ifdef INET6 488 || so->so_proto->pr_domain->dom_family == AF_INET6 489 #endif 490 ) && 491 so->so_proto->pr_protocol == IPPROTO_TCP) { 492 m = m_get(M_WAIT, MT_SOOPTS); 493 MCLAIM(m, &nfs_mowner); 494 *mtod(m, int32_t *) = 1; 495 m->m_len = sizeof(int32_t); 496 sosetopt(so, IPPROTO_TCP, TCP_NODELAY, m); 497 } 498 so->so_rcv.sb_flags &= ~SB_NOINTR; 499 so->so_rcv.sb_timeo = 0; 500 so->so_snd.sb_flags &= ~SB_NOINTR; 501 so->so_snd.sb_timeo = 0; 502 if (tslp) 503 slp = tslp; 504 else { 505 slp = nfsrv_sockalloc(); 506 } 507 slp->ns_so = so; 508 slp->ns_nam = mynam; 509 fp->f_count++; 510 slp->ns_fp = fp; 511 s = splsoftnet(); 512 so->so_upcallarg = (caddr_t)slp; 513 so->so_upcall = nfsrv_rcv; 514 so->so_rcv.sb_flags |= SB_UPCALL; 515 slp->ns_flag = (SLP_VALID | SLP_NEEDQ); 516 nfsrv_wakenfsd(slp); 517 splx(s); 518 return (0); 519 } 520 521 /* 522 * Called by nfssvc() for nfsds. Just loops around servicing rpc requests 523 * until it is killed by a signal. 524 */ 525 int 526 nfssvc_nfsd(nsd, argp, l) 527 struct nfsd_srvargs *nsd; 528 caddr_t argp; 529 struct lwp *l; 530 { 531 struct mbuf *m; 532 int siz; 533 struct nfssvc_sock *slp; 534 struct nfsd *nfsd = nsd->nsd_nfsd; 535 struct nfsrv_descript *nd = NULL; 536 struct mbuf *mreq; 537 int error = 0, cacherep, s, sotype, writes_todo; 538 u_quad_t cur_usec; 539 struct proc *p = l->l_proc; 540 541 #ifndef nolint 542 cacherep = RC_DOIT; 543 writes_todo = 0; 544 #endif 545 s = splsoftnet(); 546 if (nfsd == (struct nfsd *)0) { 547 nsd->nsd_nfsd = nfsd = (struct nfsd *) 548 malloc(sizeof (struct nfsd), M_NFSD, M_WAITOK); 549 memset((caddr_t)nfsd, 0, sizeof (struct nfsd)); 550 nfsd->nfsd_procp = p; 551 simple_lock(&nfsd_slock); 552 TAILQ_INSERT_TAIL(&nfsd_head, nfsd, nfsd_chain); 553 nfs_numnfsd++; 554 simple_unlock(&nfsd_slock); 555 } 556 PHOLD(l); 557 /* 558 * Loop getting rpc requests until SIGKILL. 559 */ 560 for (;;) { 561 if (nfsd->nfsd_slp == NULL) { 562 simple_lock(&nfsd_slock); 563 while (nfsd->nfsd_slp == NULL && 564 (nfsd_head_flag & NFSD_CHECKSLP) == 0) { 565 SLIST_INSERT_HEAD(&nfsd_idle_head, nfsd, 566 nfsd_idle); 567 nfsd_waiting++; 568 error = ltsleep(nfsd, PSOCK | PCATCH, "nfsd", 569 0, &nfsd_slock); 570 nfsd_waiting--; 571 if (error) { 572 slp = nfsd->nfsd_slp; 573 nfsd->nfsd_slp = NULL; 574 if (!slp) 575 SLIST_REMOVE(&nfsd_idle_head, 576 nfsd, nfsd, nfsd_idle); 577 simple_unlock(&nfsd_slock); 578 if (slp) { 579 nfsrv_wakenfsd(slp); 580 nfsrv_slpderef(slp); 581 } 582 goto done; 583 } 584 } 585 if (nfsd->nfsd_slp == NULL && 586 (nfsd_head_flag & NFSD_CHECKSLP) != 0) { 587 slp = TAILQ_FIRST(&nfssvc_sockpending); 588 if (slp) { 589 KASSERT((slp->ns_flag & 590 (SLP_VALID | SLP_DOREC)) 591 == (SLP_VALID | SLP_DOREC)); 592 TAILQ_REMOVE(&nfssvc_sockpending, slp, 593 ns_pending); 594 slp->ns_flag &= ~SLP_DOREC; 595 slp->ns_sref++; 596 nfsd->nfsd_slp = slp; 597 } else 598 nfsd_head_flag &= ~NFSD_CHECKSLP; 599 } 600 simple_unlock(&nfsd_slock); 601 if ((slp = nfsd->nfsd_slp) == NULL) 602 continue; 603 if (slp->ns_flag & SLP_VALID) { 604 if (slp->ns_flag & SLP_DISCONN) 605 nfsrv_zapsock(slp); 606 else if ((slp->ns_flag & SLP_NEEDQ) != 0) { 607 nfsrv_rcv(slp->ns_so, (void *)slp, 608 M_WAIT); 609 } 610 error = nfsrv_dorec(slp, nfsd, &nd); 611 cur_usec = (u_quad_t)time.tv_sec * 1000000 + 612 (u_quad_t)time.tv_usec; 613 if (error && LIST_FIRST(&slp->ns_tq) && 614 LIST_FIRST(&slp->ns_tq)->nd_time <= 615 cur_usec) { 616 error = 0; 617 cacherep = RC_DOIT; 618 writes_todo = 1; 619 } else 620 writes_todo = 0; 621 if (error == 0 && slp->ns_rec != NULL) { 622 nfsrv_wakenfsd(slp); 623 } 624 } 625 } else { 626 error = 0; 627 slp = nfsd->nfsd_slp; 628 } 629 if (error || (slp->ns_flag & SLP_VALID) == 0) { 630 if (nd) { 631 pool_put(&nfs_srvdesc_pool, nd); 632 nd = NULL; 633 } 634 nfsd->nfsd_slp = NULL; 635 nfsrv_slpderef(slp); 636 continue; 637 } 638 splx(s); 639 sotype = slp->ns_so->so_type; 640 if (nd) { 641 nd->nd_starttime = time; 642 if (nd->nd_nam2) 643 nd->nd_nam = nd->nd_nam2; 644 else 645 nd->nd_nam = slp->ns_nam; 646 647 /* 648 * Check to see if authorization is needed. 649 */ 650 if (nfsd->nfsd_flag & NFSD_NEEDAUTH) { 651 nfsd->nfsd_flag &= ~NFSD_NEEDAUTH; 652 nsd->nsd_haddr = mtod(nd->nd_nam, 653 struct sockaddr_in *)->sin_addr.s_addr; 654 nsd->nsd_authlen = nfsd->nfsd_authlen; 655 nsd->nsd_verflen = nfsd->nfsd_verflen; 656 if (!copyout(nfsd->nfsd_authstr, 657 nsd->nsd_authstr, nfsd->nfsd_authlen) && 658 !copyout(nfsd->nfsd_verfstr, 659 nsd->nsd_verfstr, nfsd->nfsd_verflen) && 660 !copyout(nsd, argp, sizeof (*nsd))) { 661 PRELE(l); 662 return (ENEEDAUTH); 663 } 664 cacherep = RC_DROPIT; 665 } else 666 cacherep = nfsrv_getcache(nd, slp, &mreq); 667 668 /* 669 * Check for just starting up for NQNFS and send 670 * fake "try again later" replies to the NQNFS clients. 671 */ 672 if (notstarted && nqnfsstarttime <= time.tv_sec) { 673 if (modify_flag) { 674 nqnfsstarttime = 675 time.tv_sec + nqsrv_writeslack; 676 modify_flag = 0; 677 } else 678 notstarted = 0; 679 } 680 if (notstarted) { 681 if ((nd->nd_flag & ND_NQNFS) == 0) 682 cacherep = RC_DROPIT; 683 else if (nd->nd_procnum != NFSPROC_WRITE) { 684 nd->nd_procnum = NFSPROC_NOOP; 685 nd->nd_repstat = NQNFS_TRYLATER; 686 cacherep = RC_DOIT; 687 } else 688 modify_flag = 1; 689 } else if (nfsd->nfsd_flag & NFSD_AUTHFAIL) { 690 nfsd->nfsd_flag &= ~NFSD_AUTHFAIL; 691 nd->nd_procnum = NFSPROC_NOOP; 692 nd->nd_repstat = 693 (NFSERR_AUTHERR | AUTH_TOOWEAK); 694 cacherep = RC_DOIT; 695 } 696 } 697 698 /* 699 * Loop to get all the write rpc relies that have been 700 * gathered together. 701 */ 702 do { 703 #ifdef DIAGNOSTIC 704 int lockcount; 705 #endif 706 switch (cacherep) { 707 case RC_DOIT: 708 #ifdef DIAGNOSTIC 709 /* 710 * NFS server procs should neither release 711 * locks already held, nor leave things 712 * locked. Catch this sooner, rather than 713 * later (when we try to relock something we 714 * already have locked). Careful inspection 715 * of the failing routine usually turns up the 716 * lock leak.. once we know what it is.. 717 */ 718 lockcount = l->l_locks; 719 #endif 720 mreq = NULL; 721 netexport_rdlock(); 722 if (writes_todo || (!(nd->nd_flag & ND_NFSV3) && 723 nd->nd_procnum == NFSPROC_WRITE && 724 nfsrvw_procrastinate > 0 && !notstarted)) 725 error = nfsrv_writegather(&nd, slp, 726 l, &mreq); 727 else 728 error = 729 (*(nfsrv3_procs[nd->nd_procnum])) 730 (nd, slp, l, &mreq); 731 netexport_rdunlock(); 732 #ifdef DIAGNOSTIC 733 if (l->l_locks != lockcount) { 734 /* 735 * If you see this panic, audit 736 * nfsrv3_procs[nd->nd_procnum] for 737 * vnode locking errors (usually, it's 738 * due to forgetting to vput() 739 * something). 740 */ 741 #ifdef DEBUG 742 extern void printlockedvnodes(void); 743 printlockedvnodes(); 744 #endif 745 printf("nfsd: locking botch in op %d" 746 " (before %d, after %d)\n", 747 nd ? nd->nd_procnum : -1, 748 lockcount, l->l_locks); 749 } 750 #endif 751 if (mreq == NULL) { 752 if (nd != NULL) { 753 if (nd->nd_nam2) 754 m_free(nd->nd_nam2); 755 if (nd->nd_mrep) 756 m_freem(nd->nd_mrep); 757 } 758 break; 759 } 760 if (error) { 761 if (nd->nd_procnum != NQNFSPROC_VACATED) 762 nfsstats.srv_errs++; 763 nfsrv_updatecache(nd, FALSE, mreq); 764 if (nd->nd_nam2) 765 m_freem(nd->nd_nam2); 766 break; 767 } 768 nfsstats.srvrpccnt[nd->nd_procnum]++; 769 nfsrv_updatecache(nd, TRUE, mreq); 770 nd->nd_mrep = (struct mbuf *)0; 771 case RC_REPLY: 772 m = mreq; 773 siz = 0; 774 while (m) { 775 siz += m->m_len; 776 m = m->m_next; 777 } 778 if (siz <= 0 || siz > NFS_MAXPACKET) { 779 printf("mbuf siz=%d\n",siz); 780 panic("Bad nfs svc reply"); 781 } 782 m = mreq; 783 m->m_pkthdr.len = siz; 784 m->m_pkthdr.rcvif = (struct ifnet *)0; 785 /* 786 * For stream protocols, prepend a Sun RPC 787 * Record Mark. 788 */ 789 if (sotype == SOCK_STREAM) { 790 M_PREPEND(m, NFSX_UNSIGNED, M_WAIT); 791 *mtod(m, u_int32_t *) = 792 htonl(0x80000000 | siz); 793 } 794 nd->nd_mreq = m; 795 if (nfsrtton) { 796 nfsd_rt(slp->ns_so->so_type, nd, 797 cacherep); 798 } 799 s = splsoftnet(); 800 error = nfsdsock_sendreply(slp, nd); 801 nd = NULL; 802 if (error == EPIPE) 803 nfsrv_zapsock(slp); 804 if (error == EINTR || error == ERESTART) { 805 nfsrv_slpderef(slp); 806 goto done; 807 } 808 splx(s); 809 break; 810 case RC_DROPIT: 811 if (nfsrtton) 812 nfsd_rt(sotype, nd, cacherep); 813 m_freem(nd->nd_mrep); 814 m_freem(nd->nd_nam2); 815 break; 816 } 817 if (nd) { 818 pool_put(&nfs_srvdesc_pool, nd); 819 nd = NULL; 820 } 821 822 /* 823 * Check to see if there are outstanding writes that 824 * need to be serviced. 825 */ 826 cur_usec = (u_quad_t)time.tv_sec * 1000000 + 827 (u_quad_t)time.tv_usec; 828 s = splsoftclock(); 829 if (LIST_FIRST(&slp->ns_tq) && 830 LIST_FIRST(&slp->ns_tq)->nd_time <= cur_usec) { 831 cacherep = RC_DOIT; 832 writes_todo = 1; 833 } else 834 writes_todo = 0; 835 splx(s); 836 } while (writes_todo); 837 s = splsoftnet(); 838 if (nfsrv_dorec(slp, nfsd, &nd)) { 839 nfsd->nfsd_slp = NULL; 840 nfsrv_slpderef(slp); 841 } 842 } 843 done: 844 PRELE(l); 845 simple_lock(&nfsd_slock); 846 TAILQ_REMOVE(&nfsd_head, nfsd, nfsd_chain); 847 simple_unlock(&nfsd_slock); 848 splx(s); 849 free((caddr_t)nfsd, M_NFSD); 850 nsd->nsd_nfsd = (struct nfsd *)0; 851 if (--nfs_numnfsd == 0) 852 nfsrv_init(TRUE); /* Reinitialize everything */ 853 return (error); 854 } 855 856 /* 857 * Shut down a socket associated with an nfssvc_sock structure. 858 * Should be called with the send lock set, if required. 859 * The trick here is to increment the sref at the start, so that the nfsds 860 * will stop using it and clear ns_flag at the end so that it will not be 861 * reassigned during cleanup. 862 * 863 * called at splsoftnet. 864 */ 865 void 866 nfsrv_zapsock(slp) 867 struct nfssvc_sock *slp; 868 { 869 struct nfsuid *nuidp, *nnuidp; 870 struct nfsrv_descript *nwp, *nnwp; 871 struct socket *so; 872 int s; 873 874 if (nfsdsock_drain(slp)) { 875 return; 876 } 877 simple_lock(&nfsd_slock); 878 if (slp->ns_flag & SLP_DOREC) { 879 TAILQ_REMOVE(&nfssvc_sockpending, slp, ns_pending); 880 } 881 simple_unlock(&nfsd_slock); 882 883 so = slp->ns_so; 884 KASSERT(so != NULL); 885 so->so_upcall = NULL; 886 so->so_upcallarg = NULL; 887 so->so_rcv.sb_flags &= ~SB_UPCALL; 888 soshutdown(so, SHUT_RDWR); 889 890 if (slp->ns_nam) 891 m_free(slp->ns_nam); 892 m_freem(slp->ns_raw); 893 m_freem(slp->ns_rec); 894 for (nuidp = TAILQ_FIRST(&slp->ns_uidlruhead); nuidp != 0; 895 nuidp = nnuidp) { 896 nnuidp = TAILQ_NEXT(nuidp, nu_lru); 897 LIST_REMOVE(nuidp, nu_hash); 898 TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, nu_lru); 899 if (nuidp->nu_flag & NU_NAM) 900 m_freem(nuidp->nu_nam); 901 free((caddr_t)nuidp, M_NFSUID); 902 } 903 s = splsoftclock(); 904 for (nwp = LIST_FIRST(&slp->ns_tq); nwp; nwp = nnwp) { 905 nnwp = LIST_NEXT(nwp, nd_tq); 906 LIST_REMOVE(nwp, nd_tq); 907 pool_put(&nfs_srvdesc_pool, nwp); 908 } 909 splx(s); 910 } 911 912 /* 913 * Derefence a server socket structure. If it has no more references and 914 * is no longer valid, you can throw it away. 915 */ 916 void 917 nfsrv_slpderef(slp) 918 struct nfssvc_sock *slp; 919 { 920 LOCK_ASSERT(!simple_lock_held(&nfsd_slock)); 921 922 if (--(slp->ns_sref) == 0 && (slp->ns_flag & SLP_VALID) == 0) { 923 struct file *fp; 924 int s = splsoftnet(); 925 simple_lock(&nfsd_slock); 926 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain); 927 simple_unlock(&nfsd_slock); 928 splx(s); 929 930 fp = slp->ns_fp; 931 if (fp != NULL) { 932 slp->ns_fp = NULL; 933 KASSERT(fp != NULL); 934 KASSERT(fp->f_data == slp->ns_so); 935 simple_lock(&fp->f_slock); 936 FILE_USE(fp); 937 closef(fp, (struct lwp *)0); 938 slp->ns_so = NULL; 939 } 940 941 nfsrv_sockfree(slp); 942 } 943 } 944 945 /* 946 * Initialize the data structures for the server. 947 * Handshake with any new nfsds starting up to avoid any chance of 948 * corruption. 949 */ 950 void 951 nfsrv_init(terminating) 952 int terminating; 953 { 954 struct nfssvc_sock *slp; 955 int s; 956 957 s = splsoftnet(); 958 simple_lock(&nfsd_slock); 959 if (nfssvc_sockhead_flag & SLP_INIT) 960 panic("nfsd init"); 961 nfssvc_sockhead_flag |= SLP_INIT; 962 963 if (terminating) { 964 while ((slp = TAILQ_FIRST(&nfssvc_sockhead)) != NULL) { 965 simple_unlock(&nfsd_slock); 966 KASSERT(slp->ns_sref == 0); 967 slp->ns_sref++; 968 nfsrv_zapsock(slp); 969 nfsrv_slpderef(slp); 970 simple_lock(&nfsd_slock); 971 } 972 simple_unlock(&nfsd_slock); 973 splx(s); 974 nfsrv_cleancache(); /* And clear out server cache */ 975 } else { 976 simple_unlock(&nfsd_slock); 977 splx(s); 978 nfs_pub.np_valid = 0; 979 } 980 981 TAILQ_INIT(&nfssvc_sockhead); 982 TAILQ_INIT(&nfssvc_sockpending); 983 nfssvc_sockhead_flag &= ~SLP_INIT; 984 985 TAILQ_INIT(&nfsd_head); 986 SLIST_INIT(&nfsd_idle_head); 987 nfsd_head_flag &= ~NFSD_CHECKSLP; 988 989 nfs_udpsock = nfsrv_sockalloc(); 990 991 #ifdef INET6 992 nfs_udp6sock = nfsrv_sockalloc(); 993 #endif 994 995 #ifdef ISO 996 nfs_cltpsock = nfsrv_sockalloc(); 997 #endif 998 999 simple_lock(&nfsd_slock); 1000 if (nfssvc_sockhead_flag & SLP_WANTINIT) { 1001 nfssvc_sockhead_flag &= ~SLP_WANTINIT; 1002 wakeup(&nfssvc_sockhead); 1003 } 1004 simple_unlock(&nfsd_slock); 1005 splx(s); 1006 } 1007 1008 /* 1009 * Add entries to the server monitor log. 1010 */ 1011 static void 1012 nfsd_rt(sotype, nd, cacherep) 1013 int sotype; 1014 struct nfsrv_descript *nd; 1015 int cacherep; 1016 { 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 rt->resptime = ((time.tv_sec - nd->nd_starttime.tv_sec) * 1000000) + 1038 (time.tv_usec - nd->nd_starttime.tv_usec); 1039 rt->tstamp = time; 1040 nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ; 1041 } 1042 #endif /* NFSSERVER */ 1043 1044 #ifdef NFS 1045 1046 int nfs_defect = 0; 1047 /* 1048 * Asynchronous I/O threads for client nfs. 1049 * They do read-ahead and write-behind operations on the block I/O cache. 1050 * Never returns unless it fails or gets killed. 1051 */ 1052 1053 int 1054 nfssvc_iod(l) 1055 struct lwp *l; 1056 { 1057 struct buf *bp; 1058 int i; 1059 struct nfs_iod *myiod; 1060 struct nfsmount *nmp; 1061 int error = 0; 1062 struct proc *p = l ? l->l_proc : NULL; 1063 1064 /* 1065 * Assign my position or return error if too many already running 1066 */ 1067 myiod = NULL; 1068 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) 1069 if (nfs_asyncdaemon[i].nid_proc == NULL) { 1070 myiod = &nfs_asyncdaemon[i]; 1071 break; 1072 } 1073 if (myiod == NULL) 1074 return (EBUSY); 1075 myiod->nid_proc = p; 1076 nfs_numasync++; 1077 PHOLD(l); 1078 /* 1079 * Just loop around doing our stuff until SIGKILL 1080 */ 1081 for (;;) { 1082 while (/*CONSTCOND*/ TRUE) { 1083 simple_lock(&myiod->nid_slock); 1084 nmp = myiod->nid_mount; 1085 if (nmp) { 1086 simple_lock(&nmp->nm_slock); 1087 if (!TAILQ_EMPTY(&nmp->nm_bufq)) { 1088 simple_unlock(&myiod->nid_slock); 1089 break; 1090 } 1091 nmp->nm_bufqiods--; 1092 simple_unlock(&nmp->nm_slock); 1093 } 1094 myiod->nid_want = p; 1095 myiod->nid_mount = NULL; 1096 error = ltsleep(&myiod->nid_want, 1097 PWAIT | PCATCH | PNORELOCK, "nfsidl", 0, 1098 &myiod->nid_slock); 1099 if (error) 1100 goto quit; 1101 } 1102 1103 while ((bp = TAILQ_FIRST(&nmp->nm_bufq)) != NULL) { 1104 /* Take one off the front of the list */ 1105 TAILQ_REMOVE(&nmp->nm_bufq, bp, b_freelist); 1106 nmp->nm_bufqlen--; 1107 if (nmp->nm_bufqwant && 1108 nmp->nm_bufqlen < 2 * nfs_numasync) { 1109 nmp->nm_bufqwant = FALSE; 1110 wakeup(&nmp->nm_bufq); 1111 } 1112 simple_unlock(&nmp->nm_slock); 1113 (void)nfs_doio(bp); 1114 simple_lock(&nmp->nm_slock); 1115 /* 1116 * If there are more than one iod on this mount, 1117 * then defect so that the iods can be shared out 1118 * fairly between the mounts 1119 */ 1120 if (nfs_defect && nmp->nm_bufqiods > 1) { 1121 myiod->nid_mount = NULL; 1122 nmp->nm_bufqiods--; 1123 break; 1124 } 1125 } 1126 simple_unlock(&nmp->nm_slock); 1127 } 1128 quit: 1129 PRELE(l); 1130 if (nmp) 1131 nmp->nm_bufqiods--; 1132 myiod->nid_want = NULL; 1133 myiod->nid_mount = NULL; 1134 myiod->nid_proc = NULL; 1135 nfs_numasync--; 1136 1137 return error; 1138 } 1139 1140 void 1141 nfs_iodinit() 1142 { 1143 int i; 1144 1145 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) 1146 simple_lock_init(&nfs_asyncdaemon[i].nid_slock); 1147 } 1148 1149 void 1150 start_nfsio(arg) 1151 void *arg; 1152 { 1153 nfssvc_iod(curlwp); 1154 1155 kthread_exit(0); 1156 } 1157 1158 void 1159 nfs_getset_niothreads(set) 1160 int set; 1161 { 1162 int i, have, start; 1163 1164 for (have = 0, i = 0; i < NFS_MAXASYNCDAEMON; i++) 1165 if (nfs_asyncdaemon[i].nid_proc != NULL) 1166 have++; 1167 1168 if (set) { 1169 /* clamp to sane range */ 1170 nfs_niothreads = max(0, min(nfs_niothreads, NFS_MAXASYNCDAEMON)); 1171 1172 start = nfs_niothreads - have; 1173 1174 while (start > 0) { 1175 kthread_create1(start_nfsio, NULL, NULL, "nfsio"); 1176 start--; 1177 } 1178 1179 for (i = 0; (start < 0) && (i < NFS_MAXASYNCDAEMON); i++) 1180 if (nfs_asyncdaemon[i].nid_proc != NULL) { 1181 psignal(nfs_asyncdaemon[i].nid_proc, SIGKILL); 1182 start++; 1183 } 1184 } else { 1185 if (nfs_niothreads >= 0) 1186 nfs_niothreads = have; 1187 } 1188 } 1189 1190 /* 1191 * Get an authorization string for the uid by having the mount_nfs sitting 1192 * on this mount point porpous out of the kernel and do it. 1193 */ 1194 int 1195 nfs_getauth(nmp, rep, cred, auth_str, auth_len, verf_str, verf_len, key) 1196 struct nfsmount *nmp; 1197 struct nfsreq *rep; 1198 kauth_cred_t cred; 1199 char **auth_str; 1200 int *auth_len; 1201 char *verf_str; 1202 int *verf_len; 1203 NFSKERBKEY_T key; /* return session key */ 1204 { 1205 int error = 0; 1206 1207 while ((nmp->nm_iflag & NFSMNT_WAITAUTH) == 0) { 1208 nmp->nm_iflag |= NFSMNT_WANTAUTH; 1209 (void) tsleep((caddr_t)&nmp->nm_authtype, PSOCK, 1210 "nfsauth1", 2 * hz); 1211 error = nfs_sigintr(nmp, rep, rep->r_lwp); 1212 if (error) { 1213 nmp->nm_iflag &= ~NFSMNT_WANTAUTH; 1214 return (error); 1215 } 1216 } 1217 nmp->nm_iflag &= ~(NFSMNT_WAITAUTH | NFSMNT_WANTAUTH); 1218 nmp->nm_authstr = *auth_str = (char *)malloc(RPCAUTH_MAXSIZ, M_TEMP, M_WAITOK); 1219 nmp->nm_authlen = RPCAUTH_MAXSIZ; 1220 nmp->nm_verfstr = verf_str; 1221 nmp->nm_verflen = *verf_len; 1222 nmp->nm_authuid = kauth_cred_geteuid(cred); 1223 wakeup((caddr_t)&nmp->nm_authstr); 1224 1225 /* 1226 * And wait for mount_nfs to do its stuff. 1227 */ 1228 while ((nmp->nm_iflag & NFSMNT_HASAUTH) == 0 && error == 0) { 1229 (void) tsleep((caddr_t)&nmp->nm_authlen, PSOCK, 1230 "nfsauth2", 2 * hz); 1231 error = nfs_sigintr(nmp, rep, rep->r_lwp); 1232 } 1233 if (nmp->nm_iflag & NFSMNT_AUTHERR) { 1234 nmp->nm_iflag &= ~NFSMNT_AUTHERR; 1235 error = EAUTH; 1236 } 1237 if (error) 1238 free((caddr_t)*auth_str, M_TEMP); 1239 else { 1240 *auth_len = nmp->nm_authlen; 1241 *verf_len = nmp->nm_verflen; 1242 memcpy(key, nmp->nm_key, sizeof (NFSKERBKEY_T)); 1243 } 1244 nmp->nm_iflag &= ~NFSMNT_HASAUTH; 1245 nmp->nm_iflag |= NFSMNT_WAITAUTH; 1246 if (nmp->nm_iflag & NFSMNT_WANTAUTH) { 1247 nmp->nm_iflag &= ~NFSMNT_WANTAUTH; 1248 wakeup((caddr_t)&nmp->nm_authtype); 1249 } 1250 return (error); 1251 } 1252 1253 /* 1254 * Get a nickname authenticator and verifier. 1255 */ 1256 int 1257 nfs_getnickauth(nmp, cred, auth_str, auth_len, verf_str, verf_len) 1258 struct nfsmount *nmp; 1259 kauth_cred_t cred; 1260 char **auth_str; 1261 int *auth_len; 1262 char *verf_str; 1263 int verf_len; 1264 { 1265 struct nfsuid *nuidp; 1266 u_int32_t *nickp, *verfp; 1267 struct timeval ktvin, ktvout; 1268 1269 #ifdef DIAGNOSTIC 1270 if (verf_len < (4 * NFSX_UNSIGNED)) 1271 panic("nfs_getnickauth verf too small"); 1272 #endif 1273 LIST_FOREACH(nuidp, NMUIDHASH(nmp, kauth_cred_geteuid(cred)), nu_hash) { 1274 if (kauth_cred_geteuid(nuidp->nu_cr) == kauth_cred_geteuid(cred)) 1275 break; 1276 } 1277 if (!nuidp || nuidp->nu_expire < time.tv_sec) 1278 return (EACCES); 1279 1280 /* 1281 * Move to the end of the lru list (end of lru == most recently used). 1282 */ 1283 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru); 1284 TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, nu_lru); 1285 1286 nickp = (u_int32_t *)malloc(2 * NFSX_UNSIGNED, M_TEMP, M_WAITOK); 1287 *nickp++ = txdr_unsigned(RPCAKN_NICKNAME); 1288 *nickp = txdr_unsigned(nuidp->nu_nickname); 1289 *auth_str = (char *)nickp; 1290 *auth_len = 2 * NFSX_UNSIGNED; 1291 1292 /* 1293 * Now we must encrypt the verifier and package it up. 1294 */ 1295 verfp = (u_int32_t *)verf_str; 1296 *verfp++ = txdr_unsigned(RPCAKN_NICKNAME); 1297 if (time.tv_sec > nuidp->nu_timestamp.tv_sec || 1298 (time.tv_sec == nuidp->nu_timestamp.tv_sec && 1299 time.tv_usec > nuidp->nu_timestamp.tv_usec)) 1300 nuidp->nu_timestamp = time; 1301 else 1302 nuidp->nu_timestamp.tv_usec++; 1303 ktvin.tv_sec = txdr_unsigned(nuidp->nu_timestamp.tv_sec); 1304 ktvin.tv_usec = txdr_unsigned(nuidp->nu_timestamp.tv_usec); 1305 1306 /* 1307 * Now encrypt the timestamp verifier in ecb mode using the session 1308 * key. 1309 */ 1310 #ifdef NFSKERB 1311 XXX 1312 #endif 1313 1314 *verfp++ = ktvout.tv_sec; 1315 *verfp++ = ktvout.tv_usec; 1316 *verfp = 0; 1317 return (0); 1318 } 1319 1320 /* 1321 * Save the current nickname in a hash list entry on the mount point. 1322 */ 1323 int 1324 nfs_savenickauth(nmp, cred, len, key, mdp, dposp, mrep) 1325 struct nfsmount *nmp; 1326 kauth_cred_t cred; 1327 int len; 1328 NFSKERBKEY_T key; 1329 struct mbuf **mdp; 1330 char **dposp; 1331 struct mbuf *mrep; 1332 { 1333 struct nfsuid *nuidp; 1334 u_int32_t *tl; 1335 int32_t t1; 1336 struct mbuf *md = *mdp; 1337 struct timeval ktvin, ktvout; 1338 u_int32_t nick; 1339 char *dpos = *dposp, *cp2; 1340 int deltasec, error = 0; 1341 1342 if (len == (3 * NFSX_UNSIGNED)) { 1343 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 1344 ktvin.tv_sec = *tl++; 1345 ktvin.tv_usec = *tl++; 1346 nick = fxdr_unsigned(u_int32_t, *tl); 1347 1348 /* 1349 * Decrypt the timestamp in ecb mode. 1350 */ 1351 #ifdef NFSKERB 1352 XXX 1353 #endif 1354 ktvout.tv_sec = fxdr_unsigned(long, ktvout.tv_sec); 1355 ktvout.tv_usec = fxdr_unsigned(long, ktvout.tv_usec); 1356 deltasec = time.tv_sec - ktvout.tv_sec; 1357 if (deltasec < 0) 1358 deltasec = -deltasec; 1359 /* 1360 * If ok, add it to the hash list for the mount point. 1361 */ 1362 if (deltasec <= NFS_KERBCLOCKSKEW) { 1363 if (nmp->nm_numuids < nuidhash_max) { 1364 nmp->nm_numuids++; 1365 nuidp = (struct nfsuid *) 1366 malloc(sizeof (struct nfsuid), M_NFSUID, 1367 M_WAITOK); 1368 } else { 1369 nuidp = TAILQ_FIRST(&nmp->nm_uidlruhead); 1370 LIST_REMOVE(nuidp, nu_hash); 1371 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, 1372 nu_lru); 1373 } 1374 nuidp->nu_flag = 0; 1375 kauth_cred_seteuid(nuidp->nu_cr, kauth_cred_geteuid(cred)); 1376 nuidp->nu_expire = time.tv_sec + NFS_KERBTTL; 1377 nuidp->nu_timestamp = ktvout; 1378 nuidp->nu_nickname = nick; 1379 memcpy(nuidp->nu_key, key, sizeof (NFSKERBKEY_T)); 1380 TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, 1381 nu_lru); 1382 LIST_INSERT_HEAD(NMUIDHASH(nmp, kauth_cred_geteuid(cred)), 1383 nuidp, nu_hash); 1384 } 1385 } else 1386 nfsm_adv(nfsm_rndup(len)); 1387 nfsmout: 1388 *mdp = md; 1389 *dposp = dpos; 1390 return (error); 1391 } 1392 #endif /* NFS */ 1393
Indexes created Mon Oct 20 20:10:13 GMT 2025