nfs_syscalls.c revision 1.82.6.1
1 /* $NetBSD: nfs_syscalls.c,v 1.82.6.1 2005/11/29 21:23:33 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 1.82.6.1 2005/11/29 21:23:33 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 proc *, 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, p); 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, p); 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 TAILQ_INIT(&slp->ns_uidlruhead); 399 s = splsoftnet(); 400 simple_lock(&nfsd_slock); 401 TAILQ_INSERT_TAIL(&nfssvc_sockhead, slp, ns_chain); 402 simple_unlock(&nfsd_slock); 403 splx(s); 404 405 return slp; 406 } 407 408 static void 409 nfsrv_sockfree(struct nfssvc_sock *slp) 410 { 411 412 KASSERT(slp->ns_so == NULL); 413 KASSERT(slp->ns_fp == NULL); 414 KASSERT((slp->ns_flag & SLP_ALLFLAGS) == 0); 415 free(slp, M_NFSSVC); 416 } 417 418 /* 419 * Adds a socket to the list for servicing by nfsds. 420 */ 421 int 422 nfssvc_addsock(fp, mynam) 423 struct file *fp; 424 struct mbuf *mynam; 425 { 426 struct mbuf *m; 427 int siz; 428 struct nfssvc_sock *slp; 429 struct socket *so; 430 struct nfssvc_sock *tslp; 431 int error, s; 432 433 so = (struct socket *)fp->f_data; 434 tslp = (struct nfssvc_sock *)0; 435 /* 436 * Add it to the list, as required. 437 */ 438 if (so->so_proto->pr_protocol == IPPROTO_UDP) { 439 #ifdef INET6 440 if (so->so_proto->pr_domain->dom_family == AF_INET6) 441 tslp = nfs_udp6sock; 442 else 443 #endif 444 tslp = nfs_udpsock; 445 if (tslp->ns_flag & SLP_VALID) { 446 m_freem(mynam); 447 return (EPERM); 448 } 449 #ifdef ISO 450 } else if (so->so_proto->pr_protocol == ISOPROTO_CLTP) { 451 tslp = nfs_cltpsock; 452 if (tslp->ns_flag & SLP_VALID) { 453 m_freem(mynam); 454 return (EPERM); 455 } 456 #endif /* ISO */ 457 } 458 if (so->so_type == SOCK_STREAM) 459 siz = NFS_MAXPACKET + sizeof (u_long); 460 else 461 siz = NFS_MAXPACKET; 462 error = soreserve(so, siz, siz); 463 if (error) { 464 m_freem(mynam); 465 return (error); 466 } 467 468 /* 469 * Set protocol specific options { for now TCP only } and 470 * reserve some space. For datagram sockets, this can get called 471 * repeatedly for the same socket, but that isn't harmful. 472 */ 473 if (so->so_type == SOCK_STREAM) { 474 m = m_get(M_WAIT, MT_SOOPTS); 475 MCLAIM(m, &nfs_mowner); 476 *mtod(m, int32_t *) = 1; 477 m->m_len = sizeof(int32_t); 478 sosetopt(so, SOL_SOCKET, SO_KEEPALIVE, m); 479 } 480 if ((so->so_proto->pr_domain->dom_family == AF_INET 481 #ifdef INET6 482 || so->so_proto->pr_domain->dom_family == AF_INET6 483 #endif 484 ) && 485 so->so_proto->pr_protocol == IPPROTO_TCP) { 486 m = m_get(M_WAIT, MT_SOOPTS); 487 MCLAIM(m, &nfs_mowner); 488 *mtod(m, int32_t *) = 1; 489 m->m_len = sizeof(int32_t); 490 sosetopt(so, IPPROTO_TCP, TCP_NODELAY, m); 491 } 492 so->so_rcv.sb_flags &= ~SB_NOINTR; 493 so->so_rcv.sb_timeo = 0; 494 so->so_snd.sb_flags &= ~SB_NOINTR; 495 so->so_snd.sb_timeo = 0; 496 if (tslp) 497 slp = tslp; 498 else { 499 slp = nfsrv_sockalloc(); 500 } 501 slp->ns_so = so; 502 slp->ns_nam = mynam; 503 fp->f_count++; 504 slp->ns_fp = fp; 505 s = splsoftnet(); 506 so->so_upcallarg = (caddr_t)slp; 507 so->so_upcall = nfsrv_rcv; 508 so->so_rcv.sb_flags |= SB_UPCALL; 509 slp->ns_flag = (SLP_VALID | SLP_NEEDQ); 510 nfsrv_wakenfsd(slp); 511 splx(s); 512 return (0); 513 } 514 515 /* 516 * Called by nfssvc() for nfsds. Just loops around servicing rpc requests 517 * until it is killed by a signal. 518 */ 519 int 520 nfssvc_nfsd(nsd, argp, l) 521 struct nfsd_srvargs *nsd; 522 caddr_t argp; 523 struct lwp *l; 524 { 525 struct mbuf *m; 526 int siz; 527 struct nfssvc_sock *slp; 528 struct socket *so; 529 int *solockp; 530 struct nfsd *nfsd = nsd->nsd_nfsd; 531 struct nfsrv_descript *nd = NULL; 532 struct mbuf *mreq; 533 int error = 0, cacherep, s, sotype, writes_todo; 534 u_quad_t cur_usec; 535 struct proc *p = l->l_proc; 536 537 #ifndef nolint 538 cacherep = RC_DOIT; 539 writes_todo = 0; 540 #endif 541 s = splsoftnet(); 542 if (nfsd == (struct nfsd *)0) { 543 nsd->nsd_nfsd = nfsd = (struct nfsd *) 544 malloc(sizeof (struct nfsd), M_NFSD, M_WAITOK); 545 memset((caddr_t)nfsd, 0, sizeof (struct nfsd)); 546 nfsd->nfsd_procp = p; 547 simple_lock(&nfsd_slock); 548 TAILQ_INSERT_TAIL(&nfsd_head, nfsd, nfsd_chain); 549 nfs_numnfsd++; 550 simple_unlock(&nfsd_slock); 551 } 552 PHOLD(l); 553 /* 554 * Loop getting rpc requests until SIGKILL. 555 */ 556 for (;;) { 557 if ((nfsd->nfsd_flag & NFSD_REQINPROG) == 0) { 558 simple_lock(&nfsd_slock); 559 while (nfsd->nfsd_slp == (struct nfssvc_sock *)0 && 560 (nfsd_head_flag & NFSD_CHECKSLP) == 0) { 561 SLIST_INSERT_HEAD(&nfsd_idle_head, nfsd, 562 nfsd_idle); 563 nfsd->nfsd_flag |= NFSD_WAITING; 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 == (struct nfssvc_sock *)0 && 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) == (struct nfssvc_sock *)0) 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) { 604 slp->ns_flag &= ~SLP_NEEDQ; 605 (void) nfs_sndlock(&slp->ns_solock, 606 (struct nfsreq *)0); 607 nfsrv_rcv(slp->ns_so, (caddr_t)slp, 608 M_WAIT); 609 nfs_sndunlock(&slp->ns_solock); 610 } 611 error = nfsrv_dorec(slp, nfsd, &nd); 612 cur_usec = (u_quad_t)time.tv_sec * 1000000 + 613 (u_quad_t)time.tv_usec; 614 if (error && LIST_FIRST(&slp->ns_tq) && 615 LIST_FIRST(&slp->ns_tq)->nd_time <= 616 cur_usec) { 617 error = 0; 618 cacherep = RC_DOIT; 619 writes_todo = 1; 620 } else 621 writes_todo = 0; 622 nfsd->nfsd_flag |= NFSD_REQINPROG; 623 } 624 } else { 625 error = 0; 626 slp = nfsd->nfsd_slp; 627 } 628 if (error || (slp->ns_flag & SLP_VALID) == 0) { 629 if (nd) { 630 pool_put(&nfs_srvdesc_pool, nd); 631 nd = NULL; 632 } 633 nfsd->nfsd_slp = (struct nfssvc_sock *)0; 634 nfsd->nfsd_flag &= ~NFSD_REQINPROG; 635 nfsrv_slpderef(slp); 636 continue; 637 } 638 splx(s); 639 so = slp->ns_so; 640 sotype = so->so_type; 641 if (so->so_proto->pr_flags & PR_CONNREQUIRED) 642 solockp = &slp->ns_solock; 643 else 644 solockp = (int *)0; 645 if (nd) { 646 nd->nd_starttime = time; 647 if (nd->nd_nam2) 648 nd->nd_nam = nd->nd_nam2; 649 else 650 nd->nd_nam = slp->ns_nam; 651 652 /* 653 * Check to see if authorization is needed. 654 */ 655 if (nfsd->nfsd_flag & NFSD_NEEDAUTH) { 656 nfsd->nfsd_flag &= ~NFSD_NEEDAUTH; 657 nsd->nsd_haddr = mtod(nd->nd_nam, 658 struct sockaddr_in *)->sin_addr.s_addr; 659 nsd->nsd_authlen = nfsd->nfsd_authlen; 660 nsd->nsd_verflen = nfsd->nfsd_verflen; 661 if (!copyout(nfsd->nfsd_authstr, 662 nsd->nsd_authstr, nfsd->nfsd_authlen) && 663 !copyout(nfsd->nfsd_verfstr, 664 nsd->nsd_verfstr, nfsd->nfsd_verflen) && 665 !copyout(nsd, argp, sizeof (*nsd))) { 666 PRELE(l); 667 return (ENEEDAUTH); 668 } 669 cacherep = RC_DROPIT; 670 } else 671 cacherep = nfsrv_getcache(nd, slp, &mreq); 672 673 /* 674 * Check for just starting up for NQNFS and send 675 * fake "try again later" replies to the NQNFS clients. 676 */ 677 if (notstarted && nqnfsstarttime <= time.tv_sec) { 678 if (modify_flag) { 679 nqnfsstarttime = 680 time.tv_sec + nqsrv_writeslack; 681 modify_flag = 0; 682 } else 683 notstarted = 0; 684 } 685 if (notstarted) { 686 if ((nd->nd_flag & ND_NQNFS) == 0) 687 cacherep = RC_DROPIT; 688 else if (nd->nd_procnum != NFSPROC_WRITE) { 689 nd->nd_procnum = NFSPROC_NOOP; 690 nd->nd_repstat = NQNFS_TRYLATER; 691 cacherep = RC_DOIT; 692 } else 693 modify_flag = 1; 694 } else if (nfsd->nfsd_flag & NFSD_AUTHFAIL) { 695 nfsd->nfsd_flag &= ~NFSD_AUTHFAIL; 696 nd->nd_procnum = NFSPROC_NOOP; 697 nd->nd_repstat = 698 (NFSERR_AUTHERR | AUTH_TOOWEAK); 699 cacherep = RC_DOIT; 700 } 701 } 702 703 /* 704 * Loop to get all the write rpc relies that have been 705 * gathered together. 706 */ 707 do { 708 #ifdef DIAGNOSTIC 709 int lockcount; 710 #endif 711 switch (cacherep) { 712 case RC_DOIT: 713 #ifdef DIAGNOSTIC 714 /* 715 * NFS server procs should neither release 716 * locks already held, nor leave things 717 * locked. Catch this sooner, rather than 718 * later (when we try to relock something we 719 * already have locked). Careful inspection 720 * of the failing routine usually turns up the 721 * lock leak.. once we know what it is.. 722 */ 723 lockcount = l->l_locks; 724 #endif 725 mreq = NULL; 726 if (writes_todo || (!(nd->nd_flag & ND_NFSV3) && 727 nd->nd_procnum == NFSPROC_WRITE && 728 nfsrvw_procrastinate > 0 && !notstarted)) 729 error = nfsrv_writegather(&nd, slp, 730 nfsd->nfsd_procp, &mreq); 731 else 732 error = 733 (*(nfsrv3_procs[nd->nd_procnum])) 734 (nd, slp, nfsd->nfsd_procp, &mreq); 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 if (solockp) 798 (void) nfs_sndlock(solockp, NULL); 799 if (slp->ns_flag & SLP_VALID) { 800 error = 801 nfs_send(so, nd->nd_nam2, m, NULL, p); 802 } else { 803 error = EPIPE; 804 m_freem(m); 805 } 806 if (nfsrtton) 807 nfsd_rt(sotype, nd, cacherep); 808 if (nd->nd_nam2) 809 m_free(nd->nd_nam2); 810 if (nd->nd_mrep) 811 m_freem(nd->nd_mrep); 812 if (error == EPIPE) 813 nfsrv_zapsock(slp); 814 if (solockp) 815 nfs_sndunlock(solockp); 816 if (error == EINTR || error == ERESTART) { 817 pool_put(&nfs_srvdesc_pool, nd); 818 nfsrv_slpderef(slp); 819 s = splsoftnet(); 820 goto done; 821 } 822 break; 823 case RC_DROPIT: 824 if (nfsrtton) 825 nfsd_rt(sotype, nd, cacherep); 826 m_freem(nd->nd_mrep); 827 m_freem(nd->nd_nam2); 828 break; 829 } 830 if (nd) { 831 pool_put(&nfs_srvdesc_pool, nd); 832 nd = NULL; 833 } 834 835 /* 836 * Check to see if there are outstanding writes that 837 * need to be serviced. 838 */ 839 cur_usec = (u_quad_t)time.tv_sec * 1000000 + 840 (u_quad_t)time.tv_usec; 841 s = splsoftclock(); 842 if (LIST_FIRST(&slp->ns_tq) && 843 LIST_FIRST(&slp->ns_tq)->nd_time <= cur_usec) { 844 cacherep = RC_DOIT; 845 writes_todo = 1; 846 } else 847 writes_todo = 0; 848 splx(s); 849 } while (writes_todo); 850 s = splsoftnet(); 851 if (nfsrv_dorec(slp, nfsd, &nd)) { 852 nfsd->nfsd_flag &= ~NFSD_REQINPROG; 853 nfsd->nfsd_slp = NULL; 854 nfsrv_slpderef(slp); 855 } 856 } 857 done: 858 PRELE(l); 859 simple_lock(&nfsd_slock); 860 TAILQ_REMOVE(&nfsd_head, nfsd, nfsd_chain); 861 simple_unlock(&nfsd_slock); 862 splx(s); 863 free((caddr_t)nfsd, M_NFSD); 864 nsd->nsd_nfsd = (struct nfsd *)0; 865 if (--nfs_numnfsd == 0) 866 nfsrv_init(TRUE); /* Reinitialize everything */ 867 return (error); 868 } 869 870 /* 871 * Shut down a socket associated with an nfssvc_sock structure. 872 * Should be called with the send lock set, if required. 873 * The trick here is to increment the sref at the start, so that the nfsds 874 * will stop using it and clear ns_flag at the end so that it will not be 875 * reassigned during cleanup. 876 * 877 * called at splsoftnet. 878 */ 879 void 880 nfsrv_zapsock(slp) 881 struct nfssvc_sock *slp; 882 { 883 struct nfsuid *nuidp, *nnuidp; 884 struct nfsrv_descript *nwp, *nnwp; 885 struct socket *so; 886 struct file *fp; 887 int s; 888 889 simple_lock(&nfsd_slock); 890 if ((slp->ns_flag & SLP_VALID) == 0) { 891 simple_unlock(&nfsd_slock); 892 return; 893 } 894 if (slp->ns_flag & SLP_DOREC) { 895 TAILQ_REMOVE(&nfssvc_sockpending, slp, ns_pending); 896 } 897 slp->ns_flag &= ~SLP_ALLFLAGS; 898 simple_unlock(&nfsd_slock); 899 900 fp = slp->ns_fp; 901 slp->ns_fp = NULL; 902 so = slp->ns_so; 903 slp->ns_so = NULL; 904 KASSERT(fp != NULL); 905 KASSERT(so != NULL); 906 KASSERT(fp->f_data == so); 907 simple_lock(&fp->f_slock); 908 FILE_USE(fp); 909 so->so_upcall = NULL; 910 so->so_upcallarg = NULL; 911 so->so_rcv.sb_flags &= ~SB_UPCALL; 912 soshutdown(so, SHUT_RDWR); 913 closef(fp, (struct proc *)0); 914 915 if (slp->ns_nam) 916 m_free(slp->ns_nam); 917 m_freem(slp->ns_raw); 918 m_freem(slp->ns_rec); 919 for (nuidp = TAILQ_FIRST(&slp->ns_uidlruhead); nuidp != 0; 920 nuidp = nnuidp) { 921 nnuidp = TAILQ_NEXT(nuidp, nu_lru); 922 LIST_REMOVE(nuidp, nu_hash); 923 TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, nu_lru); 924 if (nuidp->nu_flag & NU_NAM) 925 m_freem(nuidp->nu_nam); 926 free((caddr_t)nuidp, M_NFSUID); 927 } 928 s = splsoftclock(); 929 for (nwp = LIST_FIRST(&slp->ns_tq); nwp; nwp = nnwp) { 930 nnwp = LIST_NEXT(nwp, nd_tq); 931 LIST_REMOVE(nwp, nd_tq); 932 pool_put(&nfs_srvdesc_pool, nwp); 933 } 934 LIST_INIT(&slp->ns_tq); 935 splx(s); 936 } 937 938 /* 939 * Derefence a server socket structure. If it has no more references and 940 * is no longer valid, you can throw it away. 941 */ 942 void 943 nfsrv_slpderef(slp) 944 struct nfssvc_sock *slp; 945 { 946 LOCK_ASSERT(!simple_lock_held(&nfsd_slock)); 947 948 if (--(slp->ns_sref) == 0 && (slp->ns_flag & SLP_VALID) == 0) { 949 int s = splsoftnet(); 950 simple_lock(&nfsd_slock); 951 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain); 952 simple_unlock(&nfsd_slock); 953 splx(s); 954 nfsrv_sockfree(slp); 955 } 956 } 957 958 /* 959 * Initialize the data structures for the server. 960 * Handshake with any new nfsds starting up to avoid any chance of 961 * corruption. 962 */ 963 void 964 nfsrv_init(terminating) 965 int terminating; 966 { 967 struct nfssvc_sock *slp; 968 int s; 969 970 s = splsoftnet(); 971 simple_lock(&nfsd_slock); 972 if (nfssvc_sockhead_flag & SLP_INIT) 973 panic("nfsd init"); 974 nfssvc_sockhead_flag |= SLP_INIT; 975 976 if (terminating) { 977 while ((slp = TAILQ_FIRST(&nfssvc_sockhead)) != NULL) { 978 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain); 979 simple_unlock(&nfsd_slock); 980 if (slp->ns_flag & SLP_VALID) 981 nfsrv_zapsock(slp); 982 nfsrv_sockfree(slp); 983 simple_lock(&nfsd_slock); 984 } 985 simple_unlock(&nfsd_slock); 986 splx(s); 987 nfsrv_cleancache(); /* And clear out server cache */ 988 } else { 989 simple_unlock(&nfsd_slock); 990 splx(s); 991 nfs_pub.np_valid = 0; 992 } 993 994 TAILQ_INIT(&nfssvc_sockhead); 995 TAILQ_INIT(&nfssvc_sockpending); 996 nfssvc_sockhead_flag &= ~SLP_INIT; 997 998 TAILQ_INIT(&nfsd_head); 999 SLIST_INIT(&nfsd_idle_head); 1000 nfsd_head_flag &= ~NFSD_CHECKSLP; 1001 1002 nfs_udpsock = nfsrv_sockalloc(); 1003 1004 #ifdef INET6 1005 nfs_udp6sock = nfsrv_sockalloc(); 1006 #endif 1007 1008 #ifdef ISO 1009 nfs_cltpsock = nfsrv_sockalloc(); 1010 #endif 1011 1012 simple_lock(&nfsd_slock); 1013 if (nfssvc_sockhead_flag & SLP_WANTINIT) { 1014 nfssvc_sockhead_flag &= ~SLP_WANTINIT; 1015 wakeup(&nfssvc_sockhead); 1016 } 1017 simple_unlock(&nfsd_slock); 1018 splx(s); 1019 } 1020 1021 /* 1022 * Add entries to the server monitor log. 1023 */ 1024 static void 1025 nfsd_rt(sotype, nd, cacherep) 1026 int sotype; 1027 struct nfsrv_descript *nd; 1028 int cacherep; 1029 { 1030 struct drt *rt; 1031 1032 rt = &nfsdrt.drt[nfsdrt.pos]; 1033 if (cacherep == RC_DOIT) 1034 rt->flag = 0; 1035 else if (cacherep == RC_REPLY) 1036 rt->flag = DRT_CACHEREPLY; 1037 else 1038 rt->flag = DRT_CACHEDROP; 1039 if (sotype == SOCK_STREAM) 1040 rt->flag |= DRT_TCP; 1041 if (nd->nd_flag & ND_NQNFS) 1042 rt->flag |= DRT_NQNFS; 1043 else if (nd->nd_flag & ND_NFSV3) 1044 rt->flag |= DRT_NFSV3; 1045 rt->proc = nd->nd_procnum; 1046 if (mtod(nd->nd_nam, struct sockaddr *)->sa_family == AF_INET) 1047 rt->ipadr = mtod(nd->nd_nam, struct sockaddr_in *)->sin_addr.s_addr; 1048 else 1049 rt->ipadr = INADDR_ANY; 1050 rt->resptime = ((time.tv_sec - nd->nd_starttime.tv_sec) * 1000000) + 1051 (time.tv_usec - nd->nd_starttime.tv_usec); 1052 rt->tstamp = time; 1053 nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ; 1054 } 1055 #endif /* NFSSERVER */ 1056 1057 #ifdef NFS 1058 1059 int nfs_defect = 0; 1060 /* 1061 * Asynchronous I/O threads for client nfs. 1062 * They do read-ahead and write-behind operations on the block I/O cache. 1063 * Never returns unless it fails or gets killed. 1064 */ 1065 1066 int 1067 nfssvc_iod(l) 1068 struct lwp *l; 1069 { 1070 struct buf *bp; 1071 int i; 1072 struct nfs_iod *myiod; 1073 struct nfsmount *nmp; 1074 int error = 0; 1075 struct proc *p = l->l_proc; 1076 1077 /* 1078 * Assign my position or return error if too many already running 1079 */ 1080 myiod = NULL; 1081 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) 1082 if (nfs_asyncdaemon[i].nid_proc == NULL) { 1083 myiod = &nfs_asyncdaemon[i]; 1084 break; 1085 } 1086 if (myiod == NULL) 1087 return (EBUSY); 1088 myiod->nid_proc = p; 1089 nfs_numasync++; 1090 PHOLD(l); 1091 /* 1092 * Just loop around doing our stuff until SIGKILL 1093 */ 1094 for (;;) { 1095 while (/*CONSTCOND*/ TRUE) { 1096 simple_lock(&myiod->nid_slock); 1097 nmp = myiod->nid_mount; 1098 if (nmp) { 1099 simple_lock(&nmp->nm_slock); 1100 if (!TAILQ_EMPTY(&nmp->nm_bufq)) { 1101 simple_unlock(&myiod->nid_slock); 1102 break; 1103 } 1104 nmp->nm_bufqiods--; 1105 simple_unlock(&nmp->nm_slock); 1106 } 1107 myiod->nid_want = p; 1108 myiod->nid_mount = NULL; 1109 error = ltsleep(&myiod->nid_want, 1110 PWAIT | PCATCH | PNORELOCK, "nfsidl", 0, 1111 &myiod->nid_slock); 1112 if (error) 1113 goto quit; 1114 } 1115 1116 while ((bp = TAILQ_FIRST(&nmp->nm_bufq)) != NULL) { 1117 /* Take one off the front of the list */ 1118 TAILQ_REMOVE(&nmp->nm_bufq, bp, b_freelist); 1119 nmp->nm_bufqlen--; 1120 if (nmp->nm_bufqwant && 1121 nmp->nm_bufqlen < 2 * nfs_numasync) { 1122 nmp->nm_bufqwant = FALSE; 1123 wakeup(&nmp->nm_bufq); 1124 } 1125 simple_unlock(&nmp->nm_slock); 1126 (void)nfs_doio(bp); 1127 simple_lock(&nmp->nm_slock); 1128 /* 1129 * If there are more than one iod on this mount, 1130 * then defect so that the iods can be shared out 1131 * fairly between the mounts 1132 */ 1133 if (nfs_defect && nmp->nm_bufqiods > 1) { 1134 myiod->nid_mount = NULL; 1135 nmp->nm_bufqiods--; 1136 break; 1137 } 1138 } 1139 simple_unlock(&nmp->nm_slock); 1140 } 1141 quit: 1142 PRELE(l); 1143 if (nmp) 1144 nmp->nm_bufqiods--; 1145 myiod->nid_want = NULL; 1146 myiod->nid_mount = NULL; 1147 myiod->nid_proc = NULL; 1148 nfs_numasync--; 1149 1150 return error; 1151 } 1152 1153 void 1154 nfs_iodinit() 1155 { 1156 int i; 1157 1158 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) 1159 simple_lock_init(&nfs_asyncdaemon[i].nid_slock); 1160 } 1161 1162 void 1163 start_nfsio(arg) 1164 void *arg; 1165 { 1166 nfssvc_iod(curlwp); 1167 1168 kthread_exit(0); 1169 } 1170 1171 void 1172 nfs_getset_niothreads(set) 1173 int set; 1174 { 1175 int i, have, start; 1176 1177 for (have = 0, i = 0; i < NFS_MAXASYNCDAEMON; i++) 1178 if (nfs_asyncdaemon[i].nid_proc != NULL) 1179 have++; 1180 1181 if (set) { 1182 /* clamp to sane range */ 1183 nfs_niothreads = max(0, min(nfs_niothreads, NFS_MAXASYNCDAEMON)); 1184 1185 start = nfs_niothreads - have; 1186 1187 while (start > 0) { 1188 kthread_create1(start_nfsio, NULL, NULL, "nfsio"); 1189 start--; 1190 } 1191 1192 for (i = 0; (start < 0) && (i < NFS_MAXASYNCDAEMON); i++) 1193 if (nfs_asyncdaemon[i].nid_proc != NULL) { 1194 psignal(nfs_asyncdaemon[i].nid_proc, SIGKILL); 1195 start++; 1196 } 1197 } else { 1198 if (nfs_niothreads >= 0) 1199 nfs_niothreads = have; 1200 } 1201 } 1202 1203 /* 1204 * Get an authorization string for the uid by having the mount_nfs sitting 1205 * on this mount point porpous out of the kernel and do it. 1206 */ 1207 int 1208 nfs_getauth(nmp, rep, cred, auth_str, auth_len, verf_str, verf_len, key) 1209 struct nfsmount *nmp; 1210 struct nfsreq *rep; 1211 struct ucred *cred; 1212 char **auth_str; 1213 int *auth_len; 1214 char *verf_str; 1215 int *verf_len; 1216 NFSKERBKEY_T key; /* return session key */ 1217 { 1218 int error = 0; 1219 1220 while ((nmp->nm_iflag & NFSMNT_WAITAUTH) == 0) { 1221 nmp->nm_iflag |= NFSMNT_WANTAUTH; 1222 (void) tsleep((caddr_t)&nmp->nm_authtype, PSOCK, 1223 "nfsauth1", 2 * hz); 1224 error = nfs_sigintr(nmp, rep, rep->r_procp); 1225 if (error) { 1226 nmp->nm_iflag &= ~NFSMNT_WANTAUTH; 1227 return (error); 1228 } 1229 } 1230 nmp->nm_iflag &= ~(NFSMNT_WAITAUTH | NFSMNT_WANTAUTH); 1231 nmp->nm_authstr = *auth_str = (char *)malloc(RPCAUTH_MAXSIZ, M_TEMP, M_WAITOK); 1232 nmp->nm_authlen = RPCAUTH_MAXSIZ; 1233 nmp->nm_verfstr = verf_str; 1234 nmp->nm_verflen = *verf_len; 1235 nmp->nm_authuid = cred->cr_uid; 1236 wakeup((caddr_t)&nmp->nm_authstr); 1237 1238 /* 1239 * And wait for mount_nfs to do its stuff. 1240 */ 1241 while ((nmp->nm_iflag & NFSMNT_HASAUTH) == 0 && error == 0) { 1242 (void) tsleep((caddr_t)&nmp->nm_authlen, PSOCK, 1243 "nfsauth2", 2 * hz); 1244 error = nfs_sigintr(nmp, rep, rep->r_procp); 1245 } 1246 if (nmp->nm_iflag & NFSMNT_AUTHERR) { 1247 nmp->nm_iflag &= ~NFSMNT_AUTHERR; 1248 error = EAUTH; 1249 } 1250 if (error) 1251 free((caddr_t)*auth_str, M_TEMP); 1252 else { 1253 *auth_len = nmp->nm_authlen; 1254 *verf_len = nmp->nm_verflen; 1255 memcpy(key, nmp->nm_key, sizeof (NFSKERBKEY_T)); 1256 } 1257 nmp->nm_iflag &= ~NFSMNT_HASAUTH; 1258 nmp->nm_iflag |= NFSMNT_WAITAUTH; 1259 if (nmp->nm_iflag & NFSMNT_WANTAUTH) { 1260 nmp->nm_iflag &= ~NFSMNT_WANTAUTH; 1261 wakeup((caddr_t)&nmp->nm_authtype); 1262 } 1263 return (error); 1264 } 1265 1266 /* 1267 * Get a nickname authenticator and verifier. 1268 */ 1269 int 1270 nfs_getnickauth(nmp, cred, auth_str, auth_len, verf_str, verf_len) 1271 struct nfsmount *nmp; 1272 struct ucred *cred; 1273 char **auth_str; 1274 int *auth_len; 1275 char *verf_str; 1276 int verf_len; 1277 { 1278 struct nfsuid *nuidp; 1279 u_int32_t *nickp, *verfp; 1280 struct timeval ktvin, ktvout; 1281 1282 #ifdef DIAGNOSTIC 1283 if (verf_len < (4 * NFSX_UNSIGNED)) 1284 panic("nfs_getnickauth verf too small"); 1285 #endif 1286 LIST_FOREACH(nuidp, NMUIDHASH(nmp, cred->cr_uid), nu_hash) { 1287 if (nuidp->nu_cr.cr_uid == cred->cr_uid) 1288 break; 1289 } 1290 if (!nuidp || nuidp->nu_expire < time.tv_sec) 1291 return (EACCES); 1292 1293 /* 1294 * Move to the end of the lru list (end of lru == most recently used). 1295 */ 1296 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru); 1297 TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, nu_lru); 1298 1299 nickp = (u_int32_t *)malloc(2 * NFSX_UNSIGNED, M_TEMP, M_WAITOK); 1300 *nickp++ = txdr_unsigned(RPCAKN_NICKNAME); 1301 *nickp = txdr_unsigned(nuidp->nu_nickname); 1302 *auth_str = (char *)nickp; 1303 *auth_len = 2 * NFSX_UNSIGNED; 1304 1305 /* 1306 * Now we must encrypt the verifier and package it up. 1307 */ 1308 verfp = (u_int32_t *)verf_str; 1309 *verfp++ = txdr_unsigned(RPCAKN_NICKNAME); 1310 if (time.tv_sec > nuidp->nu_timestamp.tv_sec || 1311 (time.tv_sec == nuidp->nu_timestamp.tv_sec && 1312 time.tv_usec > nuidp->nu_timestamp.tv_usec)) 1313 nuidp->nu_timestamp = time; 1314 else 1315 nuidp->nu_timestamp.tv_usec++; 1316 ktvin.tv_sec = txdr_unsigned(nuidp->nu_timestamp.tv_sec); 1317 ktvin.tv_usec = txdr_unsigned(nuidp->nu_timestamp.tv_usec); 1318 1319 /* 1320 * Now encrypt the timestamp verifier in ecb mode using the session 1321 * key. 1322 */ 1323 #ifdef NFSKERB 1324 XXX 1325 #endif 1326 1327 *verfp++ = ktvout.tv_sec; 1328 *verfp++ = ktvout.tv_usec; 1329 *verfp = 0; 1330 return (0); 1331 } 1332 1333 /* 1334 * Save the current nickname in a hash list entry on the mount point. 1335 */ 1336 int 1337 nfs_savenickauth(nmp, cred, len, key, mdp, dposp, mrep) 1338 struct nfsmount *nmp; 1339 struct ucred *cred; 1340 int len; 1341 NFSKERBKEY_T key; 1342 struct mbuf **mdp; 1343 char **dposp; 1344 struct mbuf *mrep; 1345 { 1346 struct nfsuid *nuidp; 1347 u_int32_t *tl; 1348 int32_t t1; 1349 struct mbuf *md = *mdp; 1350 struct timeval ktvin, ktvout; 1351 u_int32_t nick; 1352 char *dpos = *dposp, *cp2; 1353 int deltasec, error = 0; 1354 1355 if (len == (3 * NFSX_UNSIGNED)) { 1356 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 1357 ktvin.tv_sec = *tl++; 1358 ktvin.tv_usec = *tl++; 1359 nick = fxdr_unsigned(u_int32_t, *tl); 1360 1361 /* 1362 * Decrypt the timestamp in ecb mode. 1363 */ 1364 #ifdef NFSKERB 1365 XXX 1366 #endif 1367 ktvout.tv_sec = fxdr_unsigned(long, ktvout.tv_sec); 1368 ktvout.tv_usec = fxdr_unsigned(long, ktvout.tv_usec); 1369 deltasec = time.tv_sec - ktvout.tv_sec; 1370 if (deltasec < 0) 1371 deltasec = -deltasec; 1372 /* 1373 * If ok, add it to the hash list for the mount point. 1374 */ 1375 if (deltasec <= NFS_KERBCLOCKSKEW) { 1376 if (nmp->nm_numuids < nuidhash_max) { 1377 nmp->nm_numuids++; 1378 nuidp = (struct nfsuid *) 1379 malloc(sizeof (struct nfsuid), M_NFSUID, 1380 M_WAITOK); 1381 } else { 1382 nuidp = TAILQ_FIRST(&nmp->nm_uidlruhead); 1383 LIST_REMOVE(nuidp, nu_hash); 1384 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, 1385 nu_lru); 1386 } 1387 nuidp->nu_flag = 0; 1388 nuidp->nu_cr.cr_uid = cred->cr_uid; 1389 nuidp->nu_expire = time.tv_sec + NFS_KERBTTL; 1390 nuidp->nu_timestamp = ktvout; 1391 nuidp->nu_nickname = nick; 1392 memcpy(nuidp->nu_key, key, sizeof (NFSKERBKEY_T)); 1393 TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, 1394 nu_lru); 1395 LIST_INSERT_HEAD(NMUIDHASH(nmp, cred->cr_uid), 1396 nuidp, nu_hash); 1397 } 1398 } else 1399 nfsm_adv(nfsm_rndup(len)); 1400 nfsmout: 1401 *mdp = md; 1402 *dposp = dpos; 1403 return (error); 1404 } 1405 #endif /* NFS */ 1406
Indexes created Wed Oct 22 13:09:56 GMT 2025