nfs_syscalls.c revision 1.85
1 /* $NetBSD: nfs_syscalls.c,v 1.85 2006/01/03 11:41:03 yamt 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 1.85 2006/01/03 11:41:03 yamt 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 void nfsd_rt __P((int, struct nfsrv_descript *, int)); 132 static struct nfssvc_sock *nfsrv_sockalloc __P((void)); 133 static void nfsrv_sockfree __P((struct nfssvc_sock *)); 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 = suser(p->p_ucred, &p->p_acflag); 180 if (error) 181 return (error); 182 183 /* Initialize NFS server / client shared data. */ 184 nfs_init(); 185 186 #ifdef NFSSERVER 187 s = splsoftnet(); 188 simple_lock(&nfsd_slock); 189 while (nfssvc_sockhead_flag & SLP_INIT) { 190 nfssvc_sockhead_flag |= SLP_WANTINIT; 191 (void) ltsleep(&nfssvc_sockhead, PSOCK, "nfsd init", 0, 192 &nfsd_slock); 193 } 194 simple_unlock(&nfsd_slock); 195 splx(s); 196 #endif 197 if (SCARG(uap, flag) & NFSSVC_BIOD) { 198 #if defined(NFS) && defined(COMPAT_14) 199 error = nfssvc_iod(l); 200 #else 201 error = ENOSYS; 202 #endif 203 } else if (SCARG(uap, flag) & NFSSVC_MNTD) { 204 #ifndef NFS 205 error = ENOSYS; 206 #else 207 error = copyin(SCARG(uap, argp), (caddr_t)&ncd, sizeof (ncd)); 208 if (error) 209 return (error); 210 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 211 ncd.ncd_dirp, l); 212 error = namei(&nd); 213 if (error) 214 return (error); 215 if ((nd.ni_vp->v_flag & VROOT) == 0) 216 error = EINVAL; 217 nmp = VFSTONFS(nd.ni_vp->v_mount); 218 vput(nd.ni_vp); 219 if (error) 220 return (error); 221 if ((nmp->nm_iflag & NFSMNT_MNTD) && 222 (SCARG(uap, flag) & NFSSVC_GOTAUTH) == 0) 223 return (0); 224 nmp->nm_iflag |= NFSMNT_MNTD; 225 error = nqnfs_clientd(nmp, p->p_ucred, &ncd, SCARG(uap, flag), 226 SCARG(uap, argp), l); 227 #endif /* NFS */ 228 } else if (SCARG(uap, flag) & NFSSVC_ADDSOCK) { 229 #ifndef NFSSERVER 230 error = ENOSYS; 231 #else 232 error = copyin(SCARG(uap, argp), (caddr_t)&nfsdarg, 233 sizeof(nfsdarg)); 234 if (error) 235 return (error); 236 /* getsock() will use the descriptor for us */ 237 error = getsock(p->p_fd, nfsdarg.sock, &fp); 238 if (error) 239 return (error); 240 /* 241 * Get the client address for connected sockets. 242 */ 243 if (nfsdarg.name == NULL || nfsdarg.namelen == 0) 244 nam = (struct mbuf *)0; 245 else { 246 error = sockargs(&nam, nfsdarg.name, nfsdarg.namelen, 247 MT_SONAME); 248 if (error) { 249 FILE_UNUSE(fp, NULL); 250 return (error); 251 } 252 } 253 error = nfssvc_addsock(fp, nam); 254 FILE_UNUSE(fp, NULL); 255 #endif /* !NFSSERVER */ 256 } else if (SCARG(uap, flag) & NFSSVC_SETEXPORTSLIST) { 257 #ifndef NFSSERVER 258 error = ENOSYS; 259 #else 260 struct export_args *args; 261 struct mountd_exports_list mel; 262 263 error = copyin(SCARG(uap, argp), &mel, sizeof(mel)); 264 if (error != 0) 265 return error; 266 267 args = (struct export_args *)malloc(mel.mel_nexports * 268 sizeof(struct export_args), M_TEMP, M_WAITOK); 269 error = copyin(mel.mel_exports, args, mel.mel_nexports * 270 sizeof(struct export_args)); 271 if (error != 0) { 272 free(args, M_TEMP); 273 return error; 274 } 275 mel.mel_exports = args; 276 277 error = mountd_set_exports_list(&mel, l); 278 279 free(args, M_TEMP); 280 #endif /* !NFSSERVER */ 281 } else { 282 #ifndef NFSSERVER 283 error = ENOSYS; 284 #else 285 error = copyin(SCARG(uap, argp), (caddr_t)nsd, sizeof (*nsd)); 286 if (error) 287 return (error); 288 if ((SCARG(uap, flag) & NFSSVC_AUTHIN) && 289 ((nfsd = nsd->nsd_nfsd)) != NULL && 290 (nfsd->nfsd_slp->ns_flag & SLP_VALID)) { 291 slp = nfsd->nfsd_slp; 292 293 /* 294 * First check to see if another nfsd has already 295 * added this credential. 296 */ 297 LIST_FOREACH(nuidp, NUIDHASH(slp,nsd->nsd_cr.cr_uid), 298 nu_hash) { 299 if (nuidp->nu_cr.cr_uid == nsd->nsd_cr.cr_uid && 300 (!nfsd->nfsd_nd->nd_nam2 || 301 netaddr_match(NU_NETFAM(nuidp), 302 &nuidp->nu_haddr, nfsd->nfsd_nd->nd_nam2))) 303 break; 304 } 305 if (nuidp) { 306 nfsrv_setcred(&nuidp->nu_cr,&nfsd->nfsd_nd->nd_cr); 307 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL; 308 } else { 309 /* 310 * Nope, so we will. 311 */ 312 if (slp->ns_numuids < nuidhash_max) { 313 slp->ns_numuids++; 314 nuidp = (struct nfsuid *) 315 malloc(sizeof (struct nfsuid), M_NFSUID, 316 M_WAITOK); 317 } else 318 nuidp = (struct nfsuid *)0; 319 if ((slp->ns_flag & SLP_VALID) == 0) { 320 if (nuidp) 321 free((caddr_t)nuidp, M_NFSUID); 322 } else { 323 if (nuidp == (struct nfsuid *)0) { 324 nuidp = TAILQ_FIRST(&slp->ns_uidlruhead); 325 LIST_REMOVE(nuidp, nu_hash); 326 TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, 327 nu_lru); 328 if (nuidp->nu_flag & NU_NAM) 329 m_freem(nuidp->nu_nam); 330 } 331 nuidp->nu_flag = 0; 332 crcvt(&nuidp->nu_cr, &nsd->nsd_cr); 333 if (nuidp->nu_cr.cr_ngroups > NGROUPS) 334 nuidp->nu_cr.cr_ngroups = NGROUPS; 335 nuidp->nu_cr.cr_ref = 1; 336 nuidp->nu_timestamp = nsd->nsd_timestamp; 337 nuidp->nu_expire = time.tv_sec + nsd->nsd_ttl; 338 /* 339 * and save the session key in nu_key. 340 */ 341 memcpy(nuidp->nu_key, nsd->nsd_key, 342 sizeof(nsd->nsd_key)); 343 if (nfsd->nfsd_nd->nd_nam2) { 344 struct sockaddr_in *saddr; 345 346 saddr = mtod(nfsd->nfsd_nd->nd_nam2, 347 struct sockaddr_in *); 348 switch (saddr->sin_family) { 349 case AF_INET: 350 nuidp->nu_flag |= NU_INETADDR; 351 nuidp->nu_inetaddr = 352 saddr->sin_addr.s_addr; 353 break; 354 case AF_ISO: 355 default: 356 nuidp->nu_flag |= NU_NAM; 357 nuidp->nu_nam = m_copym( 358 nfsd->nfsd_nd->nd_nam2, 0, 359 M_COPYALL, M_WAIT); 360 break; 361 }; 362 } 363 TAILQ_INSERT_TAIL(&slp->ns_uidlruhead, nuidp, 364 nu_lru); 365 LIST_INSERT_HEAD(NUIDHASH(slp, nsd->nsd_uid), 366 nuidp, nu_hash); 367 nfsrv_setcred(&nuidp->nu_cr, 368 &nfsd->nfsd_nd->nd_cr); 369 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL; 370 } 371 } 372 } 373 if ((SCARG(uap, flag) & NFSSVC_AUTHINFAIL) && 374 (nfsd = nsd->nsd_nfsd)) 375 nfsd->nfsd_flag |= NFSD_AUTHFAIL; 376 error = nfssvc_nfsd(nsd, SCARG(uap, argp), l); 377 #endif /* !NFSSERVER */ 378 } 379 if (error == EINTR || error == ERESTART) 380 error = 0; 381 return (error); 382 } 383 384 #ifdef NFSSERVER 385 MALLOC_DEFINE(M_NFSD, "NFS daemon", "Nfs server daemon structure"); 386 MALLOC_DEFINE(M_NFSSVC, "NFS srvsock", "Nfs server structure"); 387 struct pool nfs_srvdesc_pool; 388 389 static struct nfssvc_sock * 390 nfsrv_sockalloc() 391 { 392 struct nfssvc_sock *slp; 393 int s; 394 395 slp = (struct nfssvc_sock *) 396 malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK); 397 memset(slp, 0, sizeof (struct nfssvc_sock)); 398 simple_lock_init(&slp->ns_lock); 399 TAILQ_INIT(&slp->ns_uidlruhead); 400 s = splsoftnet(); 401 simple_lock(&nfsd_slock); 402 TAILQ_INSERT_TAIL(&nfssvc_sockhead, slp, ns_chain); 403 simple_unlock(&nfsd_slock); 404 splx(s); 405 406 return slp; 407 } 408 409 static void 410 nfsrv_sockfree(struct nfssvc_sock *slp) 411 { 412 413 KASSERT(slp->ns_so == NULL); 414 KASSERT(slp->ns_fp == NULL); 415 KASSERT((slp->ns_flag & SLP_VALID) == 0); 416 free(slp, M_NFSSVC); 417 } 418 419 /* 420 * Adds a socket to the list for servicing by nfsds. 421 */ 422 int 423 nfssvc_addsock(fp, mynam) 424 struct file *fp; 425 struct mbuf *mynam; 426 { 427 struct mbuf *m; 428 int siz; 429 struct nfssvc_sock *slp; 430 struct socket *so; 431 struct nfssvc_sock *tslp; 432 int error, s; 433 434 so = (struct socket *)fp->f_data; 435 tslp = (struct nfssvc_sock *)0; 436 /* 437 * Add it to the list, as required. 438 */ 439 if (so->so_proto->pr_protocol == IPPROTO_UDP) { 440 #ifdef INET6 441 if (so->so_proto->pr_domain->dom_family == AF_INET6) 442 tslp = nfs_udp6sock; 443 else 444 #endif 445 tslp = nfs_udpsock; 446 if (tslp->ns_flag & SLP_VALID) { 447 m_freem(mynam); 448 return (EPERM); 449 } 450 #ifdef ISO 451 } else if (so->so_proto->pr_protocol == ISOPROTO_CLTP) { 452 tslp = nfs_cltpsock; 453 if (tslp->ns_flag & SLP_VALID) { 454 m_freem(mynam); 455 return (EPERM); 456 } 457 #endif /* ISO */ 458 } 459 if (so->so_type == SOCK_STREAM) 460 siz = NFS_MAXPACKET + sizeof (u_long); 461 else 462 siz = NFS_MAXPACKET; 463 error = soreserve(so, siz, siz); 464 if (error) { 465 m_freem(mynam); 466 return (error); 467 } 468 469 /* 470 * Set protocol specific options { for now TCP only } and 471 * reserve some space. For datagram sockets, this can get called 472 * repeatedly for the same socket, but that isn't harmful. 473 */ 474 if (so->so_type == SOCK_STREAM) { 475 m = m_get(M_WAIT, MT_SOOPTS); 476 MCLAIM(m, &nfs_mowner); 477 *mtod(m, int32_t *) = 1; 478 m->m_len = sizeof(int32_t); 479 sosetopt(so, SOL_SOCKET, SO_KEEPALIVE, m); 480 } 481 if ((so->so_proto->pr_domain->dom_family == AF_INET 482 #ifdef INET6 483 || so->so_proto->pr_domain->dom_family == AF_INET6 484 #endif 485 ) && 486 so->so_proto->pr_protocol == IPPROTO_TCP) { 487 m = m_get(M_WAIT, MT_SOOPTS); 488 MCLAIM(m, &nfs_mowner); 489 *mtod(m, int32_t *) = 1; 490 m->m_len = sizeof(int32_t); 491 sosetopt(so, IPPROTO_TCP, TCP_NODELAY, m); 492 } 493 so->so_rcv.sb_flags &= ~SB_NOINTR; 494 so->so_rcv.sb_timeo = 0; 495 so->so_snd.sb_flags &= ~SB_NOINTR; 496 so->so_snd.sb_timeo = 0; 497 if (tslp) 498 slp = tslp; 499 else { 500 slp = nfsrv_sockalloc(); 501 } 502 slp->ns_so = so; 503 slp->ns_nam = mynam; 504 fp->f_count++; 505 slp->ns_fp = fp; 506 s = splsoftnet(); 507 so->so_upcallarg = (caddr_t)slp; 508 so->so_upcall = nfsrv_rcv; 509 so->so_rcv.sb_flags |= SB_UPCALL; 510 slp->ns_flag = (SLP_VALID | SLP_NEEDQ); 511 nfsrv_wakenfsd(slp); 512 splx(s); 513 return (0); 514 } 515 516 /* 517 * Called by nfssvc() for nfsds. Just loops around servicing rpc requests 518 * until it is killed by a signal. 519 */ 520 int 521 nfssvc_nfsd(nsd, argp, l) 522 struct nfsd_srvargs *nsd; 523 caddr_t argp; 524 struct lwp *l; 525 { 526 struct mbuf *m; 527 int siz; 528 struct nfssvc_sock *slp; 529 struct socket *so; 530 int *solockp; 531 struct nfsd *nfsd = nsd->nsd_nfsd; 532 struct nfsrv_descript *nd = NULL; 533 struct mbuf *mreq; 534 int error = 0, cacherep, s, sotype, writes_todo; 535 u_quad_t cur_usec; 536 struct proc *p = l->l_proc; 537 538 #ifndef nolint 539 cacherep = RC_DOIT; 540 writes_todo = 0; 541 #endif 542 s = splsoftnet(); 543 if (nfsd == (struct nfsd *)0) { 544 nsd->nsd_nfsd = nfsd = (struct nfsd *) 545 malloc(sizeof (struct nfsd), M_NFSD, M_WAITOK); 546 memset((caddr_t)nfsd, 0, sizeof (struct nfsd)); 547 nfsd->nfsd_procp = p; 548 simple_lock(&nfsd_slock); 549 TAILQ_INSERT_TAIL(&nfsd_head, nfsd, nfsd_chain); 550 nfs_numnfsd++; 551 simple_unlock(&nfsd_slock); 552 } 553 PHOLD(l); 554 /* 555 * Loop getting rpc requests until SIGKILL. 556 */ 557 for (;;) { 558 if (nfsd->nfsd_slp == NULL) { 559 simple_lock(&nfsd_slock); 560 while (nfsd->nfsd_slp == NULL && 561 (nfsd_head_flag & NFSD_CHECKSLP) == 0) { 562 SLIST_INSERT_HEAD(&nfsd_idle_head, nfsd, 563 nfsd_idle); 564 nfsd_waiting++; 565 error = ltsleep(nfsd, PSOCK | PCATCH, "nfsd", 566 0, &nfsd_slock); 567 nfsd_waiting--; 568 if (error) { 569 slp = nfsd->nfsd_slp; 570 nfsd->nfsd_slp = NULL; 571 if (!slp) 572 SLIST_REMOVE(&nfsd_idle_head, 573 nfsd, nfsd, nfsd_idle); 574 simple_unlock(&nfsd_slock); 575 if (slp) { 576 nfsrv_wakenfsd(slp); 577 nfsrv_slpderef(slp); 578 } 579 goto done; 580 } 581 } 582 if (nfsd->nfsd_slp == NULL && 583 (nfsd_head_flag & NFSD_CHECKSLP) != 0) { 584 slp = TAILQ_FIRST(&nfssvc_sockpending); 585 if (slp) { 586 KASSERT((slp->ns_flag & 587 (SLP_VALID | SLP_DOREC)) 588 == (SLP_VALID | SLP_DOREC)); 589 TAILQ_REMOVE(&nfssvc_sockpending, slp, 590 ns_pending); 591 slp->ns_flag &= ~SLP_DOREC; 592 slp->ns_sref++; 593 nfsd->nfsd_slp = slp; 594 } else 595 nfsd_head_flag &= ~NFSD_CHECKSLP; 596 } 597 simple_unlock(&nfsd_slock); 598 if ((slp = nfsd->nfsd_slp) == NULL) 599 continue; 600 if (slp->ns_flag & SLP_VALID) { 601 if (slp->ns_flag & SLP_DISCONN) 602 nfsrv_zapsock(slp); 603 else if ((slp->ns_flag & SLP_NEEDQ) != 0) { 604 nfsrv_rcv(slp->ns_so, (void *)slp, 605 M_WAIT); 606 } 607 error = nfsrv_dorec(slp, nfsd, &nd); 608 cur_usec = (u_quad_t)time.tv_sec * 1000000 + 609 (u_quad_t)time.tv_usec; 610 if (error && LIST_FIRST(&slp->ns_tq) && 611 LIST_FIRST(&slp->ns_tq)->nd_time <= 612 cur_usec) { 613 error = 0; 614 cacherep = RC_DOIT; 615 writes_todo = 1; 616 } else 617 writes_todo = 0; 618 if (error == 0 && slp->ns_rec != NULL) { 619 nfsrv_wakenfsd(slp); 620 } 621 } 622 } else { 623 error = 0; 624 slp = nfsd->nfsd_slp; 625 } 626 if (error || (slp->ns_flag & SLP_VALID) == 0) { 627 if (nd) { 628 pool_put(&nfs_srvdesc_pool, nd); 629 nd = NULL; 630 } 631 nfsd->nfsd_slp = NULL; 632 nfsrv_slpderef(slp); 633 continue; 634 } 635 splx(s); 636 so = slp->ns_so; 637 sotype = so->so_type; 638 if (so->so_proto->pr_flags & PR_CONNREQUIRED) 639 solockp = &slp->ns_solock; 640 else 641 solockp = NULL; 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 if (writes_todo || (!(nd->nd_flag & ND_NFSV3) && 724 nd->nd_procnum == NFSPROC_WRITE && 725 nfsrvw_procrastinate > 0 && !notstarted)) 726 error = nfsrv_writegather(&nd, slp, 727 l, &mreq); 728 else 729 error = 730 (*(nfsrv3_procs[nd->nd_procnum])) 731 (nd, slp, l, &mreq); 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 if (solockp) 795 nfs_sndlock(solockp, NULL); 796 if (slp->ns_flag & SLP_VALID) { 797 error = nfs_send(so, nd->nd_nam2, 798 m, NULL, l); 799 } else { 800 error = EPIPE; 801 m_freem(m); 802 } 803 if (solockp) 804 nfs_sndunlock(solockp); 805 if (nfsrtton) 806 nfsd_rt(sotype, nd, cacherep); 807 if (nd->nd_nam2) 808 m_free(nd->nd_nam2); 809 if (nd->nd_mrep) 810 m_freem(nd->nd_mrep); 811 if (error == EPIPE) 812 nfsrv_zapsock(slp); 813 if (error == EINTR || error == ERESTART) { 814 pool_put(&nfs_srvdesc_pool, nd); 815 nfsrv_slpderef(slp); 816 s = splsoftnet(); 817 goto done; 818 } 819 break; 820 case RC_DROPIT: 821 if (nfsrtton) 822 nfsd_rt(sotype, nd, cacherep); 823 m_freem(nd->nd_mrep); 824 m_freem(nd->nd_nam2); 825 break; 826 } 827 if (nd) { 828 pool_put(&nfs_srvdesc_pool, nd); 829 nd = NULL; 830 } 831 832 /* 833 * Check to see if there are outstanding writes that 834 * need to be serviced. 835 */ 836 cur_usec = (u_quad_t)time.tv_sec * 1000000 + 837 (u_quad_t)time.tv_usec; 838 s = splsoftclock(); 839 if (LIST_FIRST(&slp->ns_tq) && 840 LIST_FIRST(&slp->ns_tq)->nd_time <= cur_usec) { 841 cacherep = RC_DOIT; 842 writes_todo = 1; 843 } else 844 writes_todo = 0; 845 splx(s); 846 } while (writes_todo); 847 s = splsoftnet(); 848 if (nfsrv_dorec(slp, nfsd, &nd)) { 849 nfsd->nfsd_slp = NULL; 850 nfsrv_slpderef(slp); 851 } 852 } 853 done: 854 PRELE(l); 855 simple_lock(&nfsd_slock); 856 TAILQ_REMOVE(&nfsd_head, nfsd, nfsd_chain); 857 simple_unlock(&nfsd_slock); 858 splx(s); 859 free((caddr_t)nfsd, M_NFSD); 860 nsd->nsd_nfsd = (struct nfsd *)0; 861 if (--nfs_numnfsd == 0) 862 nfsrv_init(TRUE); /* Reinitialize everything */ 863 return (error); 864 } 865 866 /* 867 * Shut down a socket associated with an nfssvc_sock structure. 868 * Should be called with the send lock set, if required. 869 * The trick here is to increment the sref at the start, so that the nfsds 870 * will stop using it and clear ns_flag at the end so that it will not be 871 * reassigned during cleanup. 872 * 873 * called at splsoftnet. 874 */ 875 void 876 nfsrv_zapsock(slp) 877 struct nfssvc_sock *slp; 878 { 879 struct nfsuid *nuidp, *nnuidp; 880 struct nfsrv_descript *nwp, *nnwp; 881 struct socket *so; 882 int s; 883 884 if (nfsdsock_drain(slp)) { 885 return; 886 } 887 simple_lock(&nfsd_slock); 888 if (slp->ns_flag & SLP_DOREC) { 889 TAILQ_REMOVE(&nfssvc_sockpending, slp, ns_pending); 890 } 891 simple_unlock(&nfsd_slock); 892 893 so = slp->ns_so; 894 KASSERT(so != NULL); 895 so->so_upcall = NULL; 896 so->so_upcallarg = NULL; 897 so->so_rcv.sb_flags &= ~SB_UPCALL; 898 soshutdown(so, SHUT_RDWR); 899 900 if (slp->ns_nam) 901 m_free(slp->ns_nam); 902 m_freem(slp->ns_raw); 903 m_freem(slp->ns_rec); 904 for (nuidp = TAILQ_FIRST(&slp->ns_uidlruhead); nuidp != 0; 905 nuidp = nnuidp) { 906 nnuidp = TAILQ_NEXT(nuidp, nu_lru); 907 LIST_REMOVE(nuidp, nu_hash); 908 TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, nu_lru); 909 if (nuidp->nu_flag & NU_NAM) 910 m_freem(nuidp->nu_nam); 911 free((caddr_t)nuidp, M_NFSUID); 912 } 913 s = splsoftclock(); 914 for (nwp = LIST_FIRST(&slp->ns_tq); nwp; nwp = nnwp) { 915 nnwp = LIST_NEXT(nwp, nd_tq); 916 LIST_REMOVE(nwp, nd_tq); 917 pool_put(&nfs_srvdesc_pool, nwp); 918 } 919 LIST_INIT(&slp->ns_tq); 920 splx(s); 921 } 922 923 /* 924 * Derefence a server socket structure. If it has no more references and 925 * is no longer valid, you can throw it away. 926 */ 927 void 928 nfsrv_slpderef(slp) 929 struct nfssvc_sock *slp; 930 { 931 LOCK_ASSERT(!simple_lock_held(&nfsd_slock)); 932 933 if (--(slp->ns_sref) == 0 && (slp->ns_flag & SLP_VALID) == 0) { 934 struct file *fp; 935 int s = splsoftnet(); 936 simple_lock(&nfsd_slock); 937 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain); 938 simple_unlock(&nfsd_slock); 939 splx(s); 940 941 fp = slp->ns_fp; 942 if (fp != NULL) { 943 slp->ns_fp = NULL; 944 KASSERT(fp != NULL); 945 KASSERT(fp->f_data == slp->ns_so); 946 simple_lock(&fp->f_slock); 947 FILE_USE(fp); 948 closef(fp, (struct lwp *)0); 949 slp->ns_so = NULL; 950 } 951 952 nfsrv_sockfree(slp); 953 } 954 } 955 956 /* 957 * Initialize the data structures for the server. 958 * Handshake with any new nfsds starting up to avoid any chance of 959 * corruption. 960 */ 961 void 962 nfsrv_init(terminating) 963 int terminating; 964 { 965 struct nfssvc_sock *slp; 966 int s; 967 968 s = splsoftnet(); 969 simple_lock(&nfsd_slock); 970 if (nfssvc_sockhead_flag & SLP_INIT) 971 panic("nfsd init"); 972 nfssvc_sockhead_flag |= SLP_INIT; 973 974 if (terminating) { 975 while ((slp = TAILQ_FIRST(&nfssvc_sockhead)) != NULL) { 976 simple_unlock(&nfsd_slock); 977 KASSERT(slp->ns_sref == 0); 978 slp->ns_sref++; 979 nfsrv_zapsock(slp); 980 nfsrv_slpderef(slp); 981 simple_lock(&nfsd_slock); 982 } 983 simple_unlock(&nfsd_slock); 984 splx(s); 985 nfsrv_cleancache(); /* And clear out server cache */ 986 } else { 987 simple_unlock(&nfsd_slock); 988 splx(s); 989 nfs_pub.np_valid = 0; 990 } 991 992 TAILQ_INIT(&nfssvc_sockhead); 993 TAILQ_INIT(&nfssvc_sockpending); 994 nfssvc_sockhead_flag &= ~SLP_INIT; 995 996 TAILQ_INIT(&nfsd_head); 997 SLIST_INIT(&nfsd_idle_head); 998 nfsd_head_flag &= ~NFSD_CHECKSLP; 999 1000 nfs_udpsock = nfsrv_sockalloc(); 1001 1002 #ifdef INET6 1003 nfs_udp6sock = nfsrv_sockalloc(); 1004 #endif 1005 1006 #ifdef ISO 1007 nfs_cltpsock = nfsrv_sockalloc(); 1008 #endif 1009 1010 simple_lock(&nfsd_slock); 1011 if (nfssvc_sockhead_flag & SLP_WANTINIT) { 1012 nfssvc_sockhead_flag &= ~SLP_WANTINIT; 1013 wakeup(&nfssvc_sockhead); 1014 } 1015 simple_unlock(&nfsd_slock); 1016 splx(s); 1017 } 1018 1019 /* 1020 * Add entries to the server monitor log. 1021 */ 1022 static void 1023 nfsd_rt(sotype, nd, cacherep) 1024 int sotype; 1025 struct nfsrv_descript *nd; 1026 int cacherep; 1027 { 1028 struct drt *rt; 1029 1030 rt = &nfsdrt.drt[nfsdrt.pos]; 1031 if (cacherep == RC_DOIT) 1032 rt->flag = 0; 1033 else if (cacherep == RC_REPLY) 1034 rt->flag = DRT_CACHEREPLY; 1035 else 1036 rt->flag = DRT_CACHEDROP; 1037 if (sotype == SOCK_STREAM) 1038 rt->flag |= DRT_TCP; 1039 if (nd->nd_flag & ND_NQNFS) 1040 rt->flag |= DRT_NQNFS; 1041 else if (nd->nd_flag & ND_NFSV3) 1042 rt->flag |= DRT_NFSV3; 1043 rt->proc = nd->nd_procnum; 1044 if (mtod(nd->nd_nam, struct sockaddr *)->sa_family == AF_INET) 1045 rt->ipadr = mtod(nd->nd_nam, struct sockaddr_in *)->sin_addr.s_addr; 1046 else 1047 rt->ipadr = INADDR_ANY; 1048 rt->resptime = ((time.tv_sec - nd->nd_starttime.tv_sec) * 1000000) + 1049 (time.tv_usec - nd->nd_starttime.tv_usec); 1050 rt->tstamp = time; 1051 nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ; 1052 } 1053 #endif /* NFSSERVER */ 1054 1055 #ifdef NFS 1056 1057 int nfs_defect = 0; 1058 /* 1059 * Asynchronous I/O threads for client nfs. 1060 * They do read-ahead and write-behind operations on the block I/O cache. 1061 * Never returns unless it fails or gets killed. 1062 */ 1063 1064 int 1065 nfssvc_iod(l) 1066 struct lwp *l; 1067 { 1068 struct buf *bp; 1069 int i; 1070 struct nfs_iod *myiod; 1071 struct nfsmount *nmp; 1072 int error = 0; 1073 struct proc *p = l ? l->l_proc : NULL; 1074 1075 /* 1076 * Assign my position or return error if too many already running 1077 */ 1078 myiod = NULL; 1079 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) 1080 if (nfs_asyncdaemon[i].nid_proc == NULL) { 1081 myiod = &nfs_asyncdaemon[i]; 1082 break; 1083 } 1084 if (myiod == NULL) 1085 return (EBUSY); 1086 myiod->nid_proc = p; 1087 nfs_numasync++; 1088 PHOLD(l); 1089 /* 1090 * Just loop around doing our stuff until SIGKILL 1091 */ 1092 for (;;) { 1093 while (/*CONSTCOND*/ TRUE) { 1094 simple_lock(&myiod->nid_slock); 1095 nmp = myiod->nid_mount; 1096 if (nmp) { 1097 simple_lock(&nmp->nm_slock); 1098 if (!TAILQ_EMPTY(&nmp->nm_bufq)) { 1099 simple_unlock(&myiod->nid_slock); 1100 break; 1101 } 1102 nmp->nm_bufqiods--; 1103 simple_unlock(&nmp->nm_slock); 1104 } 1105 myiod->nid_want = p; 1106 myiod->nid_mount = NULL; 1107 error = ltsleep(&myiod->nid_want, 1108 PWAIT | PCATCH | PNORELOCK, "nfsidl", 0, 1109 &myiod->nid_slock); 1110 if (error) 1111 goto quit; 1112 } 1113 1114 while ((bp = TAILQ_FIRST(&nmp->nm_bufq)) != NULL) { 1115 /* Take one off the front of the list */ 1116 TAILQ_REMOVE(&nmp->nm_bufq, bp, b_freelist); 1117 nmp->nm_bufqlen--; 1118 if (nmp->nm_bufqwant && 1119 nmp->nm_bufqlen < 2 * nfs_numasync) { 1120 nmp->nm_bufqwant = FALSE; 1121 wakeup(&nmp->nm_bufq); 1122 } 1123 simple_unlock(&nmp->nm_slock); 1124 (void)nfs_doio(bp); 1125 simple_lock(&nmp->nm_slock); 1126 /* 1127 * If there are more than one iod on this mount, 1128 * then defect so that the iods can be shared out 1129 * fairly between the mounts 1130 */ 1131 if (nfs_defect && nmp->nm_bufqiods > 1) { 1132 myiod->nid_mount = NULL; 1133 nmp->nm_bufqiods--; 1134 break; 1135 } 1136 } 1137 simple_unlock(&nmp->nm_slock); 1138 } 1139 quit: 1140 PRELE(l); 1141 if (nmp) 1142 nmp->nm_bufqiods--; 1143 myiod->nid_want = NULL; 1144 myiod->nid_mount = NULL; 1145 myiod->nid_proc = NULL; 1146 nfs_numasync--; 1147 1148 return error; 1149 } 1150 1151 void 1152 nfs_iodinit() 1153 { 1154 int i; 1155 1156 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) 1157 simple_lock_init(&nfs_asyncdaemon[i].nid_slock); 1158 } 1159 1160 void 1161 start_nfsio(arg) 1162 void *arg; 1163 { 1164 nfssvc_iod(curlwp); 1165 1166 kthread_exit(0); 1167 } 1168 1169 void 1170 nfs_getset_niothreads(set) 1171 int set; 1172 { 1173 int i, have, start; 1174 1175 for (have = 0, i = 0; i < NFS_MAXASYNCDAEMON; i++) 1176 if (nfs_asyncdaemon[i].nid_proc != NULL) 1177 have++; 1178 1179 if (set) { 1180 /* clamp to sane range */ 1181 nfs_niothreads = max(0, min(nfs_niothreads, NFS_MAXASYNCDAEMON)); 1182 1183 start = nfs_niothreads - have; 1184 1185 while (start > 0) { 1186 kthread_create1(start_nfsio, NULL, NULL, "nfsio"); 1187 start--; 1188 } 1189 1190 for (i = 0; (start < 0) && (i < NFS_MAXASYNCDAEMON); i++) 1191 if (nfs_asyncdaemon[i].nid_proc != NULL) { 1192 psignal(nfs_asyncdaemon[i].nid_proc, SIGKILL); 1193 start++; 1194 } 1195 } else { 1196 if (nfs_niothreads >= 0) 1197 nfs_niothreads = have; 1198 } 1199 } 1200 1201 /* 1202 * Get an authorization string for the uid by having the mount_nfs sitting 1203 * on this mount point porpous out of the kernel and do it. 1204 */ 1205 int 1206 nfs_getauth(nmp, rep, cred, auth_str, auth_len, verf_str, verf_len, key) 1207 struct nfsmount *nmp; 1208 struct nfsreq *rep; 1209 struct ucred *cred; 1210 char **auth_str; 1211 int *auth_len; 1212 char *verf_str; 1213 int *verf_len; 1214 NFSKERBKEY_T key; /* return session key */ 1215 { 1216 int error = 0; 1217 1218 while ((nmp->nm_iflag & NFSMNT_WAITAUTH) == 0) { 1219 nmp->nm_iflag |= NFSMNT_WANTAUTH; 1220 (void) tsleep((caddr_t)&nmp->nm_authtype, PSOCK, 1221 "nfsauth1", 2 * hz); 1222 error = nfs_sigintr(nmp, rep, rep->r_lwp); 1223 if (error) { 1224 nmp->nm_iflag &= ~NFSMNT_WANTAUTH; 1225 return (error); 1226 } 1227 } 1228 nmp->nm_iflag &= ~(NFSMNT_WAITAUTH | NFSMNT_WANTAUTH); 1229 nmp->nm_authstr = *auth_str = (char *)malloc(RPCAUTH_MAXSIZ, M_TEMP, M_WAITOK); 1230 nmp->nm_authlen = RPCAUTH_MAXSIZ; 1231 nmp->nm_verfstr = verf_str; 1232 nmp->nm_verflen = *verf_len; 1233 nmp->nm_authuid = cred->cr_uid; 1234 wakeup((caddr_t)&nmp->nm_authstr); 1235 1236 /* 1237 * And wait for mount_nfs to do its stuff. 1238 */ 1239 while ((nmp->nm_iflag & NFSMNT_HASAUTH) == 0 && error == 0) { 1240 (void) tsleep((caddr_t)&nmp->nm_authlen, PSOCK, 1241 "nfsauth2", 2 * hz); 1242 error = nfs_sigintr(nmp, rep, rep->r_lwp); 1243 } 1244 if (nmp->nm_iflag & NFSMNT_AUTHERR) { 1245 nmp->nm_iflag &= ~NFSMNT_AUTHERR; 1246 error = EAUTH; 1247 } 1248 if (error) 1249 free((caddr_t)*auth_str, M_TEMP); 1250 else { 1251 *auth_len = nmp->nm_authlen; 1252 *verf_len = nmp->nm_verflen; 1253 memcpy(key, nmp->nm_key, sizeof (NFSKERBKEY_T)); 1254 } 1255 nmp->nm_iflag &= ~NFSMNT_HASAUTH; 1256 nmp->nm_iflag |= NFSMNT_WAITAUTH; 1257 if (nmp->nm_iflag & NFSMNT_WANTAUTH) { 1258 nmp->nm_iflag &= ~NFSMNT_WANTAUTH; 1259 wakeup((caddr_t)&nmp->nm_authtype); 1260 } 1261 return (error); 1262 } 1263 1264 /* 1265 * Get a nickname authenticator and verifier. 1266 */ 1267 int 1268 nfs_getnickauth(nmp, cred, auth_str, auth_len, verf_str, verf_len) 1269 struct nfsmount *nmp; 1270 struct ucred *cred; 1271 char **auth_str; 1272 int *auth_len; 1273 char *verf_str; 1274 int verf_len; 1275 { 1276 struct nfsuid *nuidp; 1277 u_int32_t *nickp, *verfp; 1278 struct timeval ktvin, ktvout; 1279 1280 #ifdef DIAGNOSTIC 1281 if (verf_len < (4 * NFSX_UNSIGNED)) 1282 panic("nfs_getnickauth verf too small"); 1283 #endif 1284 LIST_FOREACH(nuidp, NMUIDHASH(nmp, cred->cr_uid), nu_hash) { 1285 if (nuidp->nu_cr.cr_uid == cred->cr_uid) 1286 break; 1287 } 1288 if (!nuidp || nuidp->nu_expire < time.tv_sec) 1289 return (EACCES); 1290 1291 /* 1292 * Move to the end of the lru list (end of lru == most recently used). 1293 */ 1294 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru); 1295 TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, nu_lru); 1296 1297 nickp = (u_int32_t *)malloc(2 * NFSX_UNSIGNED, M_TEMP, M_WAITOK); 1298 *nickp++ = txdr_unsigned(RPCAKN_NICKNAME); 1299 *nickp = txdr_unsigned(nuidp->nu_nickname); 1300 *auth_str = (char *)nickp; 1301 *auth_len = 2 * NFSX_UNSIGNED; 1302 1303 /* 1304 * Now we must encrypt the verifier and package it up. 1305 */ 1306 verfp = (u_int32_t *)verf_str; 1307 *verfp++ = txdr_unsigned(RPCAKN_NICKNAME); 1308 if (time.tv_sec > nuidp->nu_timestamp.tv_sec || 1309 (time.tv_sec == nuidp->nu_timestamp.tv_sec && 1310 time.tv_usec > nuidp->nu_timestamp.tv_usec)) 1311 nuidp->nu_timestamp = time; 1312 else 1313 nuidp->nu_timestamp.tv_usec++; 1314 ktvin.tv_sec = txdr_unsigned(nuidp->nu_timestamp.tv_sec); 1315 ktvin.tv_usec = txdr_unsigned(nuidp->nu_timestamp.tv_usec); 1316 1317 /* 1318 * Now encrypt the timestamp verifier in ecb mode using the session 1319 * key. 1320 */ 1321 #ifdef NFSKERB 1322 XXX 1323 #endif 1324 1325 *verfp++ = ktvout.tv_sec; 1326 *verfp++ = ktvout.tv_usec; 1327 *verfp = 0; 1328 return (0); 1329 } 1330 1331 /* 1332 * Save the current nickname in a hash list entry on the mount point. 1333 */ 1334 int 1335 nfs_savenickauth(nmp, cred, len, key, mdp, dposp, mrep) 1336 struct nfsmount *nmp; 1337 struct ucred *cred; 1338 int len; 1339 NFSKERBKEY_T key; 1340 struct mbuf **mdp; 1341 char **dposp; 1342 struct mbuf *mrep; 1343 { 1344 struct nfsuid *nuidp; 1345 u_int32_t *tl; 1346 int32_t t1; 1347 struct mbuf *md = *mdp; 1348 struct timeval ktvin, ktvout; 1349 u_int32_t nick; 1350 char *dpos = *dposp, *cp2; 1351 int deltasec, error = 0; 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 nuidp->nu_cr.cr_uid = cred->cr_uid; 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, cred->cr_uid), 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