nfs_syscalls.c revision 1.88.8.9
1 /* $NetBSD: nfs_syscalls.c,v 1.88.8.9 2006/05/11 23:31:36 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 1.88.8.9 2006/05/11 23:31:36 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 #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 struct proc *p = l->l_proc; 160 int error; 161 #ifdef NFS 162 struct nameidata nd; 163 struct nfsmount *nmp; 164 struct nfsd_cargs ncd; 165 #endif 166 #ifdef NFSSERVER 167 int s; 168 struct file *fp; 169 struct mbuf *nam; 170 struct nfsd_args nfsdarg; 171 struct nfsd_srvargs nfsd_srvargs, *nsd = &nfsd_srvargs; 172 struct nfsd *nfsd; 173 struct nfssvc_sock *slp; 174 struct nfsuid *nuidp; 175 #endif 176 177 /* 178 * Must be super user 179 */ 180 error = kauth_authorize_generic(p->p_cred, KAUTH_GENERIC_ISSUSER, 181 &p->p_acflag); 182 if (error) 183 return (error); 184 185 /* Initialize NFS server / client shared data. */ 186 nfs_init(); 187 188 #ifdef NFSSERVER 189 s = splsoftnet(); 190 simple_lock(&nfsd_slock); 191 while (nfssvc_sockhead_flag & SLP_INIT) { 192 nfssvc_sockhead_flag |= SLP_WANTINIT; 193 (void) ltsleep(&nfssvc_sockhead, PSOCK, "nfsd init", 0, 194 &nfsd_slock); 195 } 196 simple_unlock(&nfsd_slock); 197 splx(s); 198 #endif 199 if (SCARG(uap, flag) & NFSSVC_BIOD) { 200 #if defined(NFS) && defined(COMPAT_14) 201 error = nfssvc_iod(l); 202 #else 203 error = ENOSYS; 204 #endif 205 } else if (SCARG(uap, flag) & NFSSVC_MNTD) { 206 #ifndef NFS 207 error = ENOSYS; 208 #else 209 error = copyin(SCARG(uap, argp), (caddr_t)&ncd, sizeof (ncd)); 210 if (error) 211 return (error); 212 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 213 ncd.ncd_dirp, l); 214 error = namei(&nd); 215 if (error) 216 return (error); 217 if ((nd.ni_vp->v_flag & VROOT) == 0) 218 error = EINVAL; 219 nmp = VFSTONFS(nd.ni_vp->v_mount); 220 vput(nd.ni_vp); 221 if (error) 222 return (error); 223 if ((nmp->nm_iflag & NFSMNT_MNTD) && 224 (SCARG(uap, flag) & NFSSVC_GOTAUTH) == 0) 225 return (0); 226 nmp->nm_iflag |= NFSMNT_MNTD; 227 error = nqnfs_clientd(nmp, p->p_cred, &ncd, SCARG(uap, flag), 228 SCARG(uap, argp), l); 229 #endif /* NFS */ 230 } else if (SCARG(uap, flag) & NFSSVC_ADDSOCK) { 231 #ifndef NFSSERVER 232 error = ENOSYS; 233 #else 234 error = copyin(SCARG(uap, argp), (caddr_t)&nfsdarg, 235 sizeof(nfsdarg)); 236 if (error) 237 return (error); 238 /* getsock() will use the descriptor for us */ 239 error = getsock(p->p_fd, nfsdarg.sock, &fp); 240 if (error) 241 return (error); 242 /* 243 * Get the client address for connected sockets. 244 */ 245 if (nfsdarg.name == NULL || nfsdarg.namelen == 0) 246 nam = (struct mbuf *)0; 247 else { 248 error = sockargs(&nam, nfsdarg.name, nfsdarg.namelen, 249 MT_SONAME); 250 if (error) { 251 FILE_UNUSE(fp, NULL); 252 return (error); 253 } 254 } 255 error = nfssvc_addsock(fp, nam); 256 FILE_UNUSE(fp, NULL); 257 #endif /* !NFSSERVER */ 258 } else if (SCARG(uap, flag) & NFSSVC_SETEXPORTSLIST) { 259 #ifndef NFSSERVER 260 error = ENOSYS; 261 #else 262 struct export_args *args; 263 struct mountd_exports_list mel; 264 265 error = copyin(SCARG(uap, argp), &mel, sizeof(mel)); 266 if (error != 0) 267 return error; 268 269 args = (struct export_args *)malloc(mel.mel_nexports * 270 sizeof(struct export_args), M_TEMP, M_WAITOK); 271 error = copyin(mel.mel_exports, args, mel.mel_nexports * 272 sizeof(struct export_args)); 273 if (error != 0) { 274 free(args, M_TEMP); 275 return error; 276 } 277 mel.mel_exports = args; 278 279 error = mountd_set_exports_list(&mel, l); 280 281 free(args, M_TEMP); 282 #endif /* !NFSSERVER */ 283 } else { 284 #ifndef NFSSERVER 285 error = ENOSYS; 286 #else 287 error = copyin(SCARG(uap, argp), (caddr_t)nsd, sizeof (*nsd)); 288 if (error) 289 return (error); 290 if ((SCARG(uap, flag) & NFSSVC_AUTHIN) && 291 ((nfsd = nsd->nsd_nfsd)) != NULL && 292 (nfsd->nfsd_slp->ns_flag & SLP_VALID)) { 293 slp = nfsd->nfsd_slp; 294 295 /* 296 * First check to see if another nfsd has already 297 * added this credential. 298 */ 299 LIST_FOREACH(nuidp, NUIDHASH(slp, nsd->nsd_cr.cr_uid), 300 nu_hash) { 301 if (kauth_cred_geteuid(nuidp->nu_cr) == 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 nfsrv_setcred(nuidp->nu_cr, &nfsd->nfsd_nd->nd_cr); 309 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL; 310 } else { 311 /* 312 * Nope, so we will. 313 */ 314 if (slp->ns_numuids < nuidhash_max) { 315 slp->ns_numuids++; 316 nuidp = (struct nfsuid *) 317 malloc(sizeof (struct nfsuid), M_NFSUID, 318 M_WAITOK); 319 } else 320 nuidp = (struct nfsuid *)0; 321 if ((slp->ns_flag & SLP_VALID) == 0) { 322 if (nuidp) 323 free((caddr_t)nuidp, M_NFSUID); 324 } else { 325 if (nuidp == (struct nfsuid *)0) { 326 nuidp = TAILQ_FIRST(&slp->ns_uidlruhead); 327 LIST_REMOVE(nuidp, nu_hash); 328 TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, 329 nu_lru); 330 if (nuidp->nu_flag & NU_NAM) 331 m_freem(nuidp->nu_nam); 332 } 333 nuidp->nu_flag = 0; 334 kauth_cred_uucvt(nuidp->nu_cr, &nsd->nsd_cr); 335 #if 0 /* XXX elad - kernel auth makes sure this can't happen. */ 336 if (nuidp->nu_cr.cr_ngroups > NGROUPS) 337 nuidp->nu_cr.cr_ngroups = NGROUPS; 338 #endif /* XXX elad */ 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 if (nd->nd_cr != NULL) 632 kauth_cred_destroy(nd->nd_cr); 633 pool_put(&nfs_srvdesc_pool, nd); 634 nd = NULL; 635 } 636 nfsd->nfsd_slp = NULL; 637 nfsrv_slpderef(slp); 638 continue; 639 } 640 splx(s); 641 sotype = slp->ns_so->so_type; 642 if (nd) { 643 nd->nd_starttime = time; 644 if (nd->nd_nam2) 645 nd->nd_nam = nd->nd_nam2; 646 else 647 nd->nd_nam = slp->ns_nam; 648 649 /* 650 * Check to see if authorization is needed. 651 */ 652 if (nfsd->nfsd_flag & NFSD_NEEDAUTH) { 653 nfsd->nfsd_flag &= ~NFSD_NEEDAUTH; 654 nsd->nsd_haddr = mtod(nd->nd_nam, 655 struct sockaddr_in *)->sin_addr.s_addr; 656 nsd->nsd_authlen = nfsd->nfsd_authlen; 657 nsd->nsd_verflen = nfsd->nfsd_verflen; 658 if (!copyout(nfsd->nfsd_authstr, 659 nsd->nsd_authstr, nfsd->nfsd_authlen) && 660 !copyout(nfsd->nfsd_verfstr, 661 nsd->nsd_verfstr, nfsd->nfsd_verflen) && 662 !copyout(nsd, argp, sizeof (*nsd))) { 663 PRELE(l); 664 return (ENEEDAUTH); 665 } 666 cacherep = RC_DROPIT; 667 } else 668 cacherep = nfsrv_getcache(nd, slp, &mreq); 669 670 /* 671 * Check for just starting up for NQNFS and send 672 * fake "try again later" replies to the NQNFS clients. 673 */ 674 if (notstarted && nqnfsstarttime <= time.tv_sec) { 675 if (modify_flag) { 676 nqnfsstarttime = 677 time.tv_sec + nqsrv_writeslack; 678 modify_flag = 0; 679 } else 680 notstarted = 0; 681 } 682 if (notstarted) { 683 if ((nd->nd_flag & ND_NQNFS) == 0) 684 cacherep = RC_DROPIT; 685 else if (nd->nd_procnum != NFSPROC_WRITE) { 686 nd->nd_procnum = NFSPROC_NOOP; 687 nd->nd_repstat = NQNFS_TRYLATER; 688 cacherep = RC_DOIT; 689 } else 690 modify_flag = 1; 691 } else if (nfsd->nfsd_flag & NFSD_AUTHFAIL) { 692 nfsd->nfsd_flag &= ~NFSD_AUTHFAIL; 693 nd->nd_procnum = NFSPROC_NOOP; 694 nd->nd_repstat = 695 (NFSERR_AUTHERR | AUTH_TOOWEAK); 696 cacherep = RC_DOIT; 697 } 698 } 699 700 /* 701 * Loop to get all the write rpc relies that have been 702 * gathered together. 703 */ 704 do { 705 #ifdef DIAGNOSTIC 706 int lockcount; 707 #endif 708 switch (cacherep) { 709 case RC_DOIT: 710 #ifdef DIAGNOSTIC 711 /* 712 * NFS server procs should neither release 713 * locks already held, nor leave things 714 * locked. Catch this sooner, rather than 715 * later (when we try to relock something we 716 * already have locked). Careful inspection 717 * of the failing routine usually turns up the 718 * lock leak.. once we know what it is.. 719 */ 720 lockcount = l->l_locks; 721 #endif 722 mreq = NULL; 723 netexport_rdlock(); 724 if (writes_todo || nd == NULL || 725 (!(nd->nd_flag & ND_NFSV3) && 726 nd->nd_procnum == NFSPROC_WRITE && 727 nfsrvw_procrastinate > 0 && !notstarted)) 728 error = nfsrv_writegather(&nd, slp, 729 l, &mreq); 730 else 731 error = 732 (*(nfsrv3_procs[nd->nd_procnum])) 733 (nd, slp, l, &mreq); 734 netexport_rdunlock(); 735 #ifdef DIAGNOSTIC 736 if (l->l_locks != lockcount) { 737 /* 738 * If you see this panic, audit 739 * nfsrv3_procs[nd->nd_procnum] for 740 * vnode locking errors (usually, it's 741 * due to forgetting to vput() 742 * something). 743 */ 744 #ifdef DEBUG 745 extern void printlockedvnodes(void); 746 printlockedvnodes(); 747 #endif 748 printf("nfsd: locking botch in op %d" 749 " (before %d, after %d)\n", 750 nd ? nd->nd_procnum : -1, 751 lockcount, l->l_locks); 752 } 753 #endif 754 if (mreq == NULL) { 755 if (nd != NULL) { 756 if (nd->nd_nam2) 757 m_free(nd->nd_nam2); 758 if (nd->nd_mrep) 759 m_freem(nd->nd_mrep); 760 } 761 break; 762 } 763 if (error) { 764 if (nd->nd_procnum != NQNFSPROC_VACATED) 765 nfsstats.srv_errs++; 766 nfsrv_updatecache(nd, FALSE, mreq); 767 if (nd->nd_nam2) 768 m_freem(nd->nd_nam2); 769 break; 770 } 771 nfsstats.srvrpccnt[nd->nd_procnum]++; 772 nfsrv_updatecache(nd, TRUE, mreq); 773 nd->nd_mrep = (struct mbuf *)0; 774 case RC_REPLY: 775 m = mreq; 776 siz = 0; 777 while (m) { 778 siz += m->m_len; 779 m = m->m_next; 780 } 781 if (siz <= 0 || siz > NFS_MAXPACKET) { 782 printf("mbuf siz=%d\n",siz); 783 panic("Bad nfs svc reply"); 784 } 785 m = mreq; 786 m->m_pkthdr.len = siz; 787 m->m_pkthdr.rcvif = (struct ifnet *)0; 788 /* 789 * For stream protocols, prepend a Sun RPC 790 * Record Mark. 791 */ 792 if (sotype == SOCK_STREAM) { 793 M_PREPEND(m, NFSX_UNSIGNED, M_WAIT); 794 *mtod(m, u_int32_t *) = 795 htonl(0x80000000 | siz); 796 } 797 nd->nd_mreq = m; 798 if (nfsrtton) { 799 nfsd_rt(slp->ns_so->so_type, nd, 800 cacherep); 801 } 802 s = splsoftnet(); 803 error = nfsdsock_sendreply(slp, nd); 804 nd = NULL; 805 if (error == EPIPE) 806 nfsrv_zapsock(slp); 807 if (error == EINTR || error == ERESTART) { 808 nfsrv_slpderef(slp); 809 goto done; 810 } 811 splx(s); 812 break; 813 case RC_DROPIT: 814 if (nfsrtton) 815 nfsd_rt(sotype, nd, cacherep); 816 m_freem(nd->nd_mrep); 817 m_freem(nd->nd_nam2); 818 break; 819 } 820 if (nd) { 821 if (nd->nd_cr != NULL) 822 kauth_cred_destroy(nd->nd_cr); 823 pool_put(&nfs_srvdesc_pool, nd); 824 nd = NULL; 825 } 826 827 /* 828 * Check to see if there are outstanding writes that 829 * need to be serviced. 830 */ 831 cur_usec = (u_quad_t)time.tv_sec * 1000000 + 832 (u_quad_t)time.tv_usec; 833 s = splsoftclock(); 834 if (LIST_FIRST(&slp->ns_tq) && 835 LIST_FIRST(&slp->ns_tq)->nd_time <= cur_usec) { 836 cacherep = RC_DOIT; 837 writes_todo = 1; 838 } else 839 writes_todo = 0; 840 splx(s); 841 } while (writes_todo); 842 s = splsoftnet(); 843 if (nfsrv_dorec(slp, nfsd, &nd)) { 844 nfsd->nfsd_slp = NULL; 845 nfsrv_slpderef(slp); 846 } 847 } 848 done: 849 PRELE(l); 850 simple_lock(&nfsd_slock); 851 TAILQ_REMOVE(&nfsd_head, nfsd, nfsd_chain); 852 simple_unlock(&nfsd_slock); 853 splx(s); 854 free((caddr_t)nfsd, M_NFSD); 855 nsd->nsd_nfsd = (struct nfsd *)0; 856 if (--nfs_numnfsd == 0) 857 nfsrv_init(TRUE); /* Reinitialize everything */ 858 return (error); 859 } 860 861 /* 862 * Shut down a socket associated with an nfssvc_sock structure. 863 * Should be called with the send lock set, if required. 864 * The trick here is to increment the sref at the start, so that the nfsds 865 * will stop using it and clear ns_flag at the end so that it will not be 866 * reassigned during cleanup. 867 * 868 * called at splsoftnet. 869 */ 870 void 871 nfsrv_zapsock(slp) 872 struct nfssvc_sock *slp; 873 { 874 struct nfsuid *nuidp, *nnuidp; 875 struct nfsrv_descript *nwp, *nnwp; 876 struct socket *so; 877 int s; 878 879 if (nfsdsock_drain(slp)) { 880 return; 881 } 882 simple_lock(&nfsd_slock); 883 if (slp->ns_flag & SLP_DOREC) { 884 TAILQ_REMOVE(&nfssvc_sockpending, slp, ns_pending); 885 } 886 simple_unlock(&nfsd_slock); 887 888 so = slp->ns_so; 889 KASSERT(so != NULL); 890 so->so_upcall = NULL; 891 so->so_upcallarg = NULL; 892 so->so_rcv.sb_flags &= ~SB_UPCALL; 893 soshutdown(so, SHUT_RDWR); 894 895 if (slp->ns_nam) 896 m_free(slp->ns_nam); 897 m_freem(slp->ns_raw); 898 m_freem(slp->ns_rec); 899 for (nuidp = TAILQ_FIRST(&slp->ns_uidlruhead); nuidp != 0; 900 nuidp = nnuidp) { 901 nnuidp = TAILQ_NEXT(nuidp, nu_lru); 902 LIST_REMOVE(nuidp, nu_hash); 903 TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, nu_lru); 904 if (nuidp->nu_flag & NU_NAM) 905 m_freem(nuidp->nu_nam); 906 free((caddr_t)nuidp, M_NFSUID); 907 } 908 s = splsoftclock(); 909 for (nwp = LIST_FIRST(&slp->ns_tq); nwp; nwp = nnwp) { 910 nnwp = LIST_NEXT(nwp, nd_tq); 911 LIST_REMOVE(nwp, nd_tq); 912 if (nwp->nd_cr != NULL) 913 kauth_cred_destroy(nwp->nd_cr); 914 pool_put(&nfs_srvdesc_pool, nwp); 915 } 916 splx(s); 917 } 918 919 /* 920 * Derefence a server socket structure. If it has no more references and 921 * is no longer valid, you can throw it away. 922 */ 923 void 924 nfsrv_slpderef(slp) 925 struct nfssvc_sock *slp; 926 { 927 LOCK_ASSERT(!simple_lock_held(&nfsd_slock)); 928 929 if (--(slp->ns_sref) == 0 && (slp->ns_flag & SLP_VALID) == 0) { 930 struct file *fp; 931 int s = splsoftnet(); 932 simple_lock(&nfsd_slock); 933 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain); 934 simple_unlock(&nfsd_slock); 935 splx(s); 936 937 fp = slp->ns_fp; 938 if (fp != NULL) { 939 slp->ns_fp = NULL; 940 KASSERT(fp != NULL); 941 KASSERT(fp->f_data == slp->ns_so); 942 simple_lock(&fp->f_slock); 943 FILE_USE(fp); 944 closef(fp, (struct lwp *)0); 945 slp->ns_so = NULL; 946 } 947 948 nfsrv_sockfree(slp); 949 } 950 } 951 952 /* 953 * Initialize the data structures for the server. 954 * Handshake with any new nfsds starting up to avoid any chance of 955 * corruption. 956 */ 957 void 958 nfsrv_init(terminating) 959 int terminating; 960 { 961 struct nfssvc_sock *slp; 962 int s; 963 964 s = splsoftnet(); 965 simple_lock(&nfsd_slock); 966 if (nfssvc_sockhead_flag & SLP_INIT) 967 panic("nfsd init"); 968 nfssvc_sockhead_flag |= SLP_INIT; 969 970 if (terminating) { 971 while ((slp = TAILQ_FIRST(&nfssvc_sockhead)) != NULL) { 972 simple_unlock(&nfsd_slock); 973 KASSERT(slp->ns_sref == 0); 974 slp->ns_sref++; 975 nfsrv_zapsock(slp); 976 nfsrv_slpderef(slp); 977 simple_lock(&nfsd_slock); 978 } 979 simple_unlock(&nfsd_slock); 980 splx(s); 981 nfsrv_cleancache(); /* And clear out server cache */ 982 } else { 983 simple_unlock(&nfsd_slock); 984 splx(s); 985 nfs_pub.np_valid = 0; 986 } 987 988 TAILQ_INIT(&nfssvc_sockhead); 989 TAILQ_INIT(&nfssvc_sockpending); 990 nfssvc_sockhead_flag &= ~SLP_INIT; 991 992 TAILQ_INIT(&nfsd_head); 993 SLIST_INIT(&nfsd_idle_head); 994 nfsd_head_flag &= ~NFSD_CHECKSLP; 995 996 nfs_udpsock = nfsrv_sockalloc(); 997 998 #ifdef INET6 999 nfs_udp6sock = nfsrv_sockalloc(); 1000 #endif 1001 1002 #ifdef ISO 1003 nfs_cltpsock = nfsrv_sockalloc(); 1004 #endif 1005 1006 simple_lock(&nfsd_slock); 1007 if (nfssvc_sockhead_flag & SLP_WANTINIT) { 1008 nfssvc_sockhead_flag &= ~SLP_WANTINIT; 1009 wakeup(&nfssvc_sockhead); 1010 } 1011 simple_unlock(&nfsd_slock); 1012 splx(s); 1013 } 1014 1015 /* 1016 * Add entries to the server monitor log. 1017 */ 1018 static void 1019 nfsd_rt(sotype, nd, cacherep) 1020 int sotype; 1021 struct nfsrv_descript *nd; 1022 int cacherep; 1023 { 1024 struct drt *rt; 1025 1026 rt = &nfsdrt.drt[nfsdrt.pos]; 1027 if (cacherep == RC_DOIT) 1028 rt->flag = 0; 1029 else if (cacherep == RC_REPLY) 1030 rt->flag = DRT_CACHEREPLY; 1031 else 1032 rt->flag = DRT_CACHEDROP; 1033 if (sotype == SOCK_STREAM) 1034 rt->flag |= DRT_TCP; 1035 if (nd->nd_flag & ND_NQNFS) 1036 rt->flag |= DRT_NQNFS; 1037 else if (nd->nd_flag & ND_NFSV3) 1038 rt->flag |= DRT_NFSV3; 1039 rt->proc = nd->nd_procnum; 1040 if (mtod(nd->nd_nam, struct sockaddr *)->sa_family == AF_INET) 1041 rt->ipadr = mtod(nd->nd_nam, struct sockaddr_in *)->sin_addr.s_addr; 1042 else 1043 rt->ipadr = INADDR_ANY; 1044 rt->resptime = ((time.tv_sec - nd->nd_starttime.tv_sec) * 1000000) + 1045 (time.tv_usec - nd->nd_starttime.tv_usec); 1046 rt->tstamp = time; 1047 nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ; 1048 } 1049 #endif /* NFSSERVER */ 1050 1051 #ifdef NFS 1052 1053 int nfs_defect = 0; 1054 /* 1055 * Asynchronous I/O threads for client nfs. 1056 * They do read-ahead and write-behind operations on the block I/O cache. 1057 * Never returns unless it fails or gets killed. 1058 */ 1059 1060 int 1061 nfssvc_iod(l) 1062 struct lwp *l; 1063 { 1064 struct buf *bp; 1065 int i; 1066 struct nfs_iod *myiod; 1067 struct nfsmount *nmp; 1068 int error = 0; 1069 struct proc *p = l->l_proc; 1070 1071 /* 1072 * Assign my position or return error if too many already running 1073 */ 1074 myiod = NULL; 1075 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) 1076 if (nfs_asyncdaemon[i].nid_proc == NULL) { 1077 myiod = &nfs_asyncdaemon[i]; 1078 break; 1079 } 1080 if (myiod == NULL) 1081 return (EBUSY); 1082 myiod->nid_proc = p; 1083 nfs_numasync++; 1084 PHOLD(l); 1085 /* 1086 * Just loop around doing our stuff until SIGKILL 1087 */ 1088 for (;;) { 1089 while (/*CONSTCOND*/ TRUE) { 1090 simple_lock(&myiod->nid_slock); 1091 nmp = myiod->nid_mount; 1092 if (nmp) { 1093 simple_lock(&nmp->nm_slock); 1094 if (!TAILQ_EMPTY(&nmp->nm_bufq)) { 1095 simple_unlock(&myiod->nid_slock); 1096 break; 1097 } 1098 nmp->nm_bufqiods--; 1099 simple_unlock(&nmp->nm_slock); 1100 } 1101 myiod->nid_want = p; 1102 myiod->nid_mount = NULL; 1103 error = ltsleep(&myiod->nid_want, 1104 PWAIT | PCATCH | PNORELOCK, "nfsidl", 0, 1105 &myiod->nid_slock); 1106 if (error) 1107 goto quit; 1108 } 1109 1110 while ((bp = TAILQ_FIRST(&nmp->nm_bufq)) != NULL) { 1111 /* Take one off the front of the list */ 1112 TAILQ_REMOVE(&nmp->nm_bufq, bp, b_freelist); 1113 nmp->nm_bufqlen--; 1114 if (nmp->nm_bufqwant && 1115 nmp->nm_bufqlen < 2 * nfs_numasync) { 1116 nmp->nm_bufqwant = FALSE; 1117 wakeup(&nmp->nm_bufq); 1118 } 1119 simple_unlock(&nmp->nm_slock); 1120 (void)nfs_doio(bp); 1121 simple_lock(&nmp->nm_slock); 1122 /* 1123 * If there are more than one iod on this mount, 1124 * then defect so that the iods can be shared out 1125 * fairly between the mounts 1126 */ 1127 if (nfs_defect && nmp->nm_bufqiods > 1) { 1128 myiod->nid_mount = NULL; 1129 nmp->nm_bufqiods--; 1130 break; 1131 } 1132 } 1133 simple_unlock(&nmp->nm_slock); 1134 } 1135 quit: 1136 PRELE(l); 1137 if (nmp) 1138 nmp->nm_bufqiods--; 1139 myiod->nid_want = NULL; 1140 myiod->nid_mount = NULL; 1141 myiod->nid_proc = NULL; 1142 nfs_numasync--; 1143 1144 return error; 1145 } 1146 1147 void 1148 nfs_iodinit() 1149 { 1150 int i; 1151 1152 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) 1153 simple_lock_init(&nfs_asyncdaemon[i].nid_slock); 1154 } 1155 1156 void 1157 start_nfsio(arg) 1158 void *arg; 1159 { 1160 nfssvc_iod(curlwp); 1161 1162 kthread_exit(0); 1163 } 1164 1165 void 1166 nfs_getset_niothreads(set) 1167 int set; 1168 { 1169 int i, have, start; 1170 1171 for (have = 0, i = 0; i < NFS_MAXASYNCDAEMON; i++) 1172 if (nfs_asyncdaemon[i].nid_proc != NULL) 1173 have++; 1174 1175 if (set) { 1176 /* clamp to sane range */ 1177 nfs_niothreads = max(0, min(nfs_niothreads, NFS_MAXASYNCDAEMON)); 1178 1179 start = nfs_niothreads - have; 1180 1181 while (start > 0) { 1182 kthread_create1(start_nfsio, NULL, NULL, "nfsio"); 1183 start--; 1184 } 1185 1186 for (i = 0; (start < 0) && (i < NFS_MAXASYNCDAEMON); i++) 1187 if (nfs_asyncdaemon[i].nid_proc != NULL) { 1188 psignal(nfs_asyncdaemon[i].nid_proc, SIGKILL); 1189 start++; 1190 } 1191 } else { 1192 if (nfs_niothreads >= 0) 1193 nfs_niothreads = have; 1194 } 1195 } 1196 1197 /* 1198 * Get an authorization string for the uid by having the mount_nfs sitting 1199 * on this mount point porpous out of the kernel and do it. 1200 */ 1201 int 1202 nfs_getauth(nmp, rep, cred, auth_str, auth_len, verf_str, verf_len, key) 1203 struct nfsmount *nmp; 1204 struct nfsreq *rep; 1205 kauth_cred_t cred; 1206 char **auth_str; 1207 int *auth_len; 1208 char *verf_str; 1209 int *verf_len; 1210 NFSKERBKEY_T key; /* return session key */ 1211 { 1212 int error = 0; 1213 1214 while ((nmp->nm_iflag & NFSMNT_WAITAUTH) == 0) { 1215 nmp->nm_iflag |= NFSMNT_WANTAUTH; 1216 (void) tsleep((caddr_t)&nmp->nm_authtype, PSOCK, 1217 "nfsauth1", 2 * hz); 1218 error = nfs_sigintr(nmp, rep, rep->r_lwp); 1219 if (error) { 1220 nmp->nm_iflag &= ~NFSMNT_WANTAUTH; 1221 return (error); 1222 } 1223 } 1224 nmp->nm_iflag &= ~(NFSMNT_WAITAUTH | NFSMNT_WANTAUTH); 1225 nmp->nm_authstr = *auth_str = (char *)malloc(RPCAUTH_MAXSIZ, M_TEMP, M_WAITOK); 1226 nmp->nm_authlen = RPCAUTH_MAXSIZ; 1227 nmp->nm_verfstr = verf_str; 1228 nmp->nm_verflen = *verf_len; 1229 nmp->nm_authuid = kauth_cred_geteuid(cred); 1230 wakeup((caddr_t)&nmp->nm_authstr); 1231 1232 /* 1233 * And wait for mount_nfs to do its stuff. 1234 */ 1235 while ((nmp->nm_iflag & NFSMNT_HASAUTH) == 0 && error == 0) { 1236 (void) tsleep((caddr_t)&nmp->nm_authlen, PSOCK, 1237 "nfsauth2", 2 * hz); 1238 error = nfs_sigintr(nmp, rep, rep->r_lwp); 1239 } 1240 if (nmp->nm_iflag & NFSMNT_AUTHERR) { 1241 nmp->nm_iflag &= ~NFSMNT_AUTHERR; 1242 error = EAUTH; 1243 } 1244 if (error) 1245 free((caddr_t)*auth_str, M_TEMP); 1246 else { 1247 *auth_len = nmp->nm_authlen; 1248 *verf_len = nmp->nm_verflen; 1249 memcpy(key, nmp->nm_key, sizeof (NFSKERBKEY_T)); 1250 } 1251 nmp->nm_iflag &= ~NFSMNT_HASAUTH; 1252 nmp->nm_iflag |= NFSMNT_WAITAUTH; 1253 if (nmp->nm_iflag & NFSMNT_WANTAUTH) { 1254 nmp->nm_iflag &= ~NFSMNT_WANTAUTH; 1255 wakeup((caddr_t)&nmp->nm_authtype); 1256 } 1257 return (error); 1258 } 1259 1260 /* 1261 * Get a nickname authenticator and verifier. 1262 */ 1263 int 1264 nfs_getnickauth(nmp, cred, auth_str, auth_len, verf_str, verf_len) 1265 struct nfsmount *nmp; 1266 kauth_cred_t cred; 1267 char **auth_str; 1268 int *auth_len; 1269 char *verf_str; 1270 int verf_len; 1271 { 1272 struct nfsuid *nuidp; 1273 u_int32_t *nickp, *verfp; 1274 struct timeval ktvin, ktvout; 1275 1276 memset(&ktvout, 0, sizeof ktvout); /* XXX gcc */ 1277 1278 #ifdef DIAGNOSTIC 1279 if (verf_len < (4 * NFSX_UNSIGNED)) 1280 panic("nfs_getnickauth verf too small"); 1281 #endif 1282 LIST_FOREACH(nuidp, NMUIDHASH(nmp, kauth_cred_geteuid(cred)), nu_hash) { 1283 if (kauth_cred_geteuid(nuidp->nu_cr) == kauth_cred_geteuid(cred)) 1284 break; 1285 } 1286 if (!nuidp || nuidp->nu_expire < time.tv_sec) 1287 return (EACCES); 1288 1289 /* 1290 * Move to the end of the lru list (end of lru == most recently used). 1291 */ 1292 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru); 1293 TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, nu_lru); 1294 1295 nickp = (u_int32_t *)malloc(2 * NFSX_UNSIGNED, M_TEMP, M_WAITOK); 1296 *nickp++ = txdr_unsigned(RPCAKN_NICKNAME); 1297 *nickp = txdr_unsigned(nuidp->nu_nickname); 1298 *auth_str = (char *)nickp; 1299 *auth_len = 2 * NFSX_UNSIGNED; 1300 1301 /* 1302 * Now we must encrypt the verifier and package it up. 1303 */ 1304 verfp = (u_int32_t *)verf_str; 1305 *verfp++ = txdr_unsigned(RPCAKN_NICKNAME); 1306 if (time.tv_sec > nuidp->nu_timestamp.tv_sec || 1307 (time.tv_sec == nuidp->nu_timestamp.tv_sec && 1308 time.tv_usec > nuidp->nu_timestamp.tv_usec)) 1309 nuidp->nu_timestamp = time; 1310 else 1311 nuidp->nu_timestamp.tv_usec++; 1312 ktvin.tv_sec = txdr_unsigned(nuidp->nu_timestamp.tv_sec); 1313 ktvin.tv_usec = txdr_unsigned(nuidp->nu_timestamp.tv_usec); 1314 1315 /* 1316 * Now encrypt the timestamp verifier in ecb mode using the session 1317 * key. 1318 */ 1319 #ifdef NFSKERB 1320 XXX 1321 #endif 1322 1323 *verfp++ = ktvout.tv_sec; 1324 *verfp++ = ktvout.tv_usec; 1325 *verfp = 0; 1326 return (0); 1327 } 1328 1329 /* 1330 * Save the current nickname in a hash list entry on the mount point. 1331 */ 1332 int 1333 nfs_savenickauth(nmp, cred, len, key, mdp, dposp, mrep) 1334 struct nfsmount *nmp; 1335 kauth_cred_t cred; 1336 int len; 1337 NFSKERBKEY_T key; 1338 struct mbuf **mdp; 1339 char **dposp; 1340 struct mbuf *mrep; 1341 { 1342 struct nfsuid *nuidp; 1343 u_int32_t *tl; 1344 int32_t t1; 1345 struct mbuf *md = *mdp; 1346 struct timeval ktvin, ktvout; 1347 u_int32_t nick; 1348 char *dpos = *dposp, *cp2; 1349 int deltasec, error = 0; 1350 1351 memset(&ktvout, 0, sizeof ktvout); /* XXX gcc */ 1352 1353 if (len == (3 * NFSX_UNSIGNED)) { 1354 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 1355 ktvin.tv_sec = *tl++; 1356 ktvin.tv_usec = *tl++; 1357 nick = fxdr_unsigned(u_int32_t, *tl); 1358 1359 /* 1360 * Decrypt the timestamp in ecb mode. 1361 */ 1362 #ifdef NFSKERB 1363 XXX 1364 #endif 1365 ktvout.tv_sec = fxdr_unsigned(long, ktvout.tv_sec); 1366 ktvout.tv_usec = fxdr_unsigned(long, ktvout.tv_usec); 1367 deltasec = time.tv_sec - ktvout.tv_sec; 1368 if (deltasec < 0) 1369 deltasec = -deltasec; 1370 /* 1371 * If ok, add it to the hash list for the mount point. 1372 */ 1373 if (deltasec <= NFS_KERBCLOCKSKEW) { 1374 if (nmp->nm_numuids < nuidhash_max) { 1375 nmp->nm_numuids++; 1376 nuidp = (struct nfsuid *) 1377 malloc(sizeof (struct nfsuid), M_NFSUID, 1378 M_WAITOK); 1379 } else { 1380 nuidp = TAILQ_FIRST(&nmp->nm_uidlruhead); 1381 LIST_REMOVE(nuidp, nu_hash); 1382 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, 1383 nu_lru); 1384 } 1385 nuidp->nu_flag = 0; 1386 kauth_cred_seteuid(nuidp->nu_cr, kauth_cred_geteuid(cred)); 1387 nuidp->nu_expire = time.tv_sec + NFS_KERBTTL; 1388 nuidp->nu_timestamp = ktvout; 1389 nuidp->nu_nickname = nick; 1390 memcpy(nuidp->nu_key, key, sizeof (NFSKERBKEY_T)); 1391 TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, 1392 nu_lru); 1393 LIST_INSERT_HEAD(NMUIDHASH(nmp, kauth_cred_geteuid(cred)), 1394 nuidp, nu_hash); 1395 } 1396 } else 1397 nfsm_adv(nfsm_rndup(len)); 1398 nfsmout: 1399 *mdp = md; 1400 *dposp = dpos; 1401 return (error); 1402 } 1403 #endif /* NFS */ 1404
Indexes created Mon Oct 20 20:10:13 GMT 2025