nfs_syscalls.c revision 1.88.8.6
1 /* $NetBSD: nfs_syscalls.c,v 1.88.8.6 2006/04/14 10:02:48 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 1.88.8.6 2006/04/14 10:02:48 elad Exp $"); 39 40 #include "fs_nfs.h" 41 #include "opt_nfs.h" 42 #include "opt_nfsserver.h" 43 #include "opt_iso.h" 44 #include "opt_inet.h" 45 #include "opt_compat_netbsd.h" 46 47 #include <sys/param.h> 48 #include <sys/systm.h> 49 #include <sys/kernel.h> 50 #include <sys/file.h> 51 #include <sys/stat.h> 52 #include <sys/vnode.h> 53 #include <sys/mount.h> 54 #include <sys/proc.h> 55 #include <sys/uio.h> 56 #include <sys/malloc.h> 57 #include <sys/buf.h> 58 #include <sys/mbuf.h> 59 #include <sys/socket.h> 60 #include <sys/socketvar.h> 61 #include <sys/signalvar.h> 62 #include <sys/domain.h> 63 #include <sys/protosw.h> 64 #include <sys/namei.h> 65 #include <sys/syslog.h> 66 #include <sys/filedesc.h> 67 #include <sys/kthread.h> 68 69 #include <sys/sa.h> 70 #include <sys/syscallargs.h> 71 72 #include <netinet/in.h> 73 #include <netinet/tcp.h> 74 #ifdef ISO 75 #include <netiso/iso.h> 76 #endif 77 #include <nfs/xdr_subs.h> 78 #include <nfs/rpcv2.h> 79 #include <nfs/nfsproto.h> 80 #include <nfs/nfs.h> 81 #include <nfs/nfsm_subs.h> 82 #include <nfs/nfsrvcache.h> 83 #include <nfs/nfsmount.h> 84 #include <nfs/nfsnode.h> 85 #include <nfs/nqnfs.h> 86 #include <nfs/nfsrtt.h> 87 #include <nfs/nfs_var.h> 88 89 /* Global defs. */ 90 extern int32_t (*nfsrv3_procs[NFS_NPROCS]) __P((struct nfsrv_descript *, 91 struct nfssvc_sock *, 92 struct lwp *, struct mbuf **)); 93 extern time_t nqnfsstarttime; 94 extern int nfsrvw_procrastinate; 95 96 struct nfssvc_sock *nfs_udpsock; 97 #ifdef ISO 98 struct nfssvc_sock *nfs_cltpsock; 99 #endif 100 #ifdef INET6 101 struct nfssvc_sock *nfs_udp6sock; 102 #endif 103 int nuidhash_max = NFS_MAXUIDHASH; 104 int nfsd_waiting = 0; 105 #ifdef NFSSERVER 106 static int nfs_numnfsd = 0; 107 static int notstarted = 1; 108 static int modify_flag = 0; 109 static struct nfsdrt nfsdrt; 110 #endif 111 112 #ifdef NFSSERVER 113 struct simplelock nfsd_slock = SIMPLELOCK_INITIALIZER; 114 struct nfssvc_sockhead nfssvc_sockhead; 115 struct nfssvc_sockhead nfssvc_sockpending; 116 struct nfsdhead nfsd_head; 117 struct nfsdidlehead nfsd_idle_head; 118 119 int nfssvc_sockhead_flag; 120 int nfsd_head_flag; 121 #endif 122 123 MALLOC_DEFINE(M_NFSUID, "NFS uid", "Nfs uid mapping structure"); 124 125 #ifdef NFS 126 struct nfs_iod nfs_asyncdaemon[NFS_MAXASYNCDAEMON]; 127 int nfs_niothreads = -1; /* == "0, and has never been set" */ 128 #endif 129 130 #ifdef NFSSERVER 131 static struct nfssvc_sock *nfsrv_sockalloc __P((void)); 132 static void nfsrv_sockfree __P((struct nfssvc_sock *)); 133 static void nfsd_rt __P((int, struct nfsrv_descript *, int)); 134 #endif 135 136 /* 137 * NFS server system calls 138 */ 139 140 141 /* 142 * Nfs server pseudo system call for the nfsd's 143 * Based on the flag value it either: 144 * - adds a socket to the selection list 145 * - remains in the kernel as an nfsd 146 * - remains in the kernel as an nfsiod 147 */ 148 int 149 sys_nfssvc(l, v, retval) 150 struct lwp *l; 151 void *v; 152 register_t *retval; 153 { 154 struct sys_nfssvc_args /* { 155 syscallarg(int) flag; 156 syscallarg(caddr_t) argp; 157 } */ *uap = v; 158 struct proc *p = l->l_proc; 159 int error; 160 #ifdef NFS 161 struct nameidata nd; 162 struct nfsmount *nmp; 163 struct nfsd_cargs ncd; 164 #endif 165 #ifdef NFSSERVER 166 int s; 167 struct file *fp; 168 struct mbuf *nam; 169 struct nfsd_args nfsdarg; 170 struct nfsd_srvargs nfsd_srvargs, *nsd = &nfsd_srvargs; 171 struct nfsd *nfsd; 172 struct nfssvc_sock *slp; 173 struct nfsuid *nuidp; 174 #endif 175 176 /* 177 * Must be super user 178 */ 179 error = kauth_authorize_generic(p->p_cred, KAUTH_GENERIC_ISSUSER, 180 &p->p_acflag); 181 if (error) 182 return (error); 183 184 /* Initialize NFS server / client shared data. */ 185 nfs_init(); 186 187 #ifdef NFSSERVER 188 s = splsoftnet(); 189 simple_lock(&nfsd_slock); 190 while (nfssvc_sockhead_flag & SLP_INIT) { 191 nfssvc_sockhead_flag |= SLP_WANTINIT; 192 (void) ltsleep(&nfssvc_sockhead, PSOCK, "nfsd init", 0, 193 &nfsd_slock); 194 } 195 simple_unlock(&nfsd_slock); 196 splx(s); 197 #endif 198 if (SCARG(uap, flag) & NFSSVC_BIOD) { 199 #if defined(NFS) && defined(COMPAT_14) 200 error = nfssvc_iod(l); 201 #else 202 error = ENOSYS; 203 #endif 204 } else if (SCARG(uap, flag) & NFSSVC_MNTD) { 205 #ifndef NFS 206 error = ENOSYS; 207 #else 208 error = copyin(SCARG(uap, argp), (caddr_t)&ncd, sizeof (ncd)); 209 if (error) 210 return (error); 211 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 212 ncd.ncd_dirp, l); 213 error = namei(&nd); 214 if (error) 215 return (error); 216 if ((nd.ni_vp->v_flag & VROOT) == 0) 217 error = EINVAL; 218 nmp = VFSTONFS(nd.ni_vp->v_mount); 219 vput(nd.ni_vp); 220 if (error) 221 return (error); 222 if ((nmp->nm_iflag & NFSMNT_MNTD) && 223 (SCARG(uap, flag) & NFSSVC_GOTAUTH) == 0) 224 return (0); 225 nmp->nm_iflag |= NFSMNT_MNTD; 226 error = nqnfs_clientd(nmp, p->p_cred, &ncd, SCARG(uap, flag), 227 SCARG(uap, argp), l); 228 #endif /* NFS */ 229 } else if (SCARG(uap, flag) & NFSSVC_ADDSOCK) { 230 #ifndef NFSSERVER 231 error = ENOSYS; 232 #else 233 error = copyin(SCARG(uap, argp), (caddr_t)&nfsdarg, 234 sizeof(nfsdarg)); 235 if (error) 236 return (error); 237 /* getsock() will use the descriptor for us */ 238 error = getsock(p->p_fd, nfsdarg.sock, &fp); 239 if (error) 240 return (error); 241 /* 242 * Get the client address for connected sockets. 243 */ 244 if (nfsdarg.name == NULL || nfsdarg.namelen == 0) 245 nam = (struct mbuf *)0; 246 else { 247 error = sockargs(&nam, nfsdarg.name, nfsdarg.namelen, 248 MT_SONAME); 249 if (error) { 250 FILE_UNUSE(fp, NULL); 251 return (error); 252 } 253 } 254 error = nfssvc_addsock(fp, nam); 255 FILE_UNUSE(fp, NULL); 256 #endif /* !NFSSERVER */ 257 } else if (SCARG(uap, flag) & NFSSVC_SETEXPORTSLIST) { 258 #ifndef NFSSERVER 259 error = ENOSYS; 260 #else 261 struct export_args *args; 262 struct mountd_exports_list mel; 263 264 error = copyin(SCARG(uap, argp), &mel, sizeof(mel)); 265 if (error != 0) 266 return error; 267 268 args = (struct export_args *)malloc(mel.mel_nexports * 269 sizeof(struct export_args), M_TEMP, M_WAITOK); 270 error = copyin(mel.mel_exports, args, mel.mel_nexports * 271 sizeof(struct export_args)); 272 if (error != 0) { 273 free(args, M_TEMP); 274 return error; 275 } 276 mel.mel_exports = args; 277 278 error = mountd_set_exports_list(&mel, l); 279 280 free(args, M_TEMP); 281 #endif /* !NFSSERVER */ 282 } else { 283 #ifndef NFSSERVER 284 error = ENOSYS; 285 #else 286 error = copyin(SCARG(uap, argp), (caddr_t)nsd, sizeof (*nsd)); 287 if (error) 288 return (error); 289 if ((SCARG(uap, flag) & NFSSVC_AUTHIN) && 290 ((nfsd = nsd->nsd_nfsd)) != NULL && 291 (nfsd->nfsd_slp->ns_flag & SLP_VALID)) { 292 slp = nfsd->nfsd_slp; 293 294 /* 295 * First check to see if another nfsd has already 296 * added this credential. 297 */ 298 LIST_FOREACH(nuidp, NUIDHASH(slp, nsd->nsd_cr.cr_uid), 299 nu_hash) { 300 if (kauth_cred_geteuid(nuidp->nu_cr) == nsd->nsd_cr.cr_uid && 301 (!nfsd->nfsd_nd->nd_nam2 || 302 netaddr_match(NU_NETFAM(nuidp), 303 &nuidp->nu_haddr, nfsd->nfsd_nd->nd_nam2))) 304 break; 305 } 306 if (nuidp) { 307 nfsrv_setcred(nuidp->nu_cr, &nfsd->nfsd_nd->nd_cr); 308 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL; 309 } else { 310 /* 311 * Nope, so we will. 312 */ 313 if (slp->ns_numuids < nuidhash_max) { 314 slp->ns_numuids++; 315 nuidp = (struct nfsuid *) 316 malloc(sizeof (struct nfsuid), M_NFSUID, 317 M_WAITOK); 318 } else 319 nuidp = (struct nfsuid *)0; 320 if ((slp->ns_flag & SLP_VALID) == 0) { 321 if (nuidp) 322 free((caddr_t)nuidp, M_NFSUID); 323 } else { 324 if (nuidp == (struct nfsuid *)0) { 325 nuidp = TAILQ_FIRST(&slp->ns_uidlruhead); 326 LIST_REMOVE(nuidp, nu_hash); 327 TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, 328 nu_lru); 329 if (nuidp->nu_flag & NU_NAM) 330 m_freem(nuidp->nu_nam); 331 } 332 nuidp->nu_flag = 0; 333 kauth_cred_uucvt(nuidp->nu_cr, &nsd->nsd_cr); 334 #if 0 /* XXX elad - kernel auth makes sure this can't happen. */ 335 if (nuidp->nu_cr.cr_ngroups > NGROUPS) 336 nuidp->nu_cr.cr_ngroups = NGROUPS; 337 #endif /* XXX elad */ 338 nuidp->nu_timestamp = nsd->nsd_timestamp; 339 nuidp->nu_expire = time.tv_sec + nsd->nsd_ttl; 340 /* 341 * and save the session key in nu_key. 342 */ 343 memcpy(nuidp->nu_key, nsd->nsd_key, 344 sizeof(nsd->nsd_key)); 345 if (nfsd->nfsd_nd->nd_nam2) { 346 struct sockaddr_in *saddr; 347 348 saddr = mtod(nfsd->nfsd_nd->nd_nam2, 349 struct sockaddr_in *); 350 switch (saddr->sin_family) { 351 case AF_INET: 352 nuidp->nu_flag |= NU_INETADDR; 353 nuidp->nu_inetaddr = 354 saddr->sin_addr.s_addr; 355 break; 356 case AF_ISO: 357 default: 358 nuidp->nu_flag |= NU_NAM; 359 nuidp->nu_nam = m_copym( 360 nfsd->nfsd_nd->nd_nam2, 0, 361 M_COPYALL, M_WAIT); 362 break; 363 }; 364 } 365 TAILQ_INSERT_TAIL(&slp->ns_uidlruhead, nuidp, 366 nu_lru); 367 LIST_INSERT_HEAD(NUIDHASH(slp, nsd->nsd_uid), 368 nuidp, nu_hash); 369 nfsrv_setcred(nuidp->nu_cr, 370 &nfsd->nfsd_nd->nd_cr); 371 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL; 372 } 373 } 374 } 375 if ((SCARG(uap, flag) & NFSSVC_AUTHINFAIL) && 376 (nfsd = nsd->nsd_nfsd)) 377 nfsd->nfsd_flag |= NFSD_AUTHFAIL; 378 error = nfssvc_nfsd(nsd, SCARG(uap, argp), l); 379 #endif /* !NFSSERVER */ 380 } 381 if (error == EINTR || error == ERESTART) 382 error = 0; 383 return (error); 384 } 385 386 #ifdef NFSSERVER 387 MALLOC_DEFINE(M_NFSD, "NFS daemon", "Nfs server daemon structure"); 388 MALLOC_DEFINE(M_NFSSVC, "NFS srvsock", "Nfs server structure"); 389 struct pool nfs_srvdesc_pool; 390 391 static struct nfssvc_sock * 392 nfsrv_sockalloc() 393 { 394 struct nfssvc_sock *slp; 395 int s; 396 397 slp = (struct nfssvc_sock *) 398 malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK); 399 memset(slp, 0, sizeof (struct nfssvc_sock)); 400 simple_lock_init(&slp->ns_lock); 401 TAILQ_INIT(&slp->ns_uidlruhead); 402 LIST_INIT(&slp->ns_tq); 403 SIMPLEQ_INIT(&slp->ns_sendq); 404 s = splsoftnet(); 405 simple_lock(&nfsd_slock); 406 TAILQ_INSERT_TAIL(&nfssvc_sockhead, slp, ns_chain); 407 simple_unlock(&nfsd_slock); 408 splx(s); 409 410 return slp; 411 } 412 413 static void 414 nfsrv_sockfree(struct nfssvc_sock *slp) 415 { 416 417 KASSERT(slp->ns_so == NULL); 418 KASSERT(slp->ns_fp == NULL); 419 KASSERT((slp->ns_flag & SLP_VALID) == 0); 420 free(slp, M_NFSSVC); 421 } 422 423 /* 424 * Adds a socket to the list for servicing by nfsds. 425 */ 426 int 427 nfssvc_addsock(fp, mynam) 428 struct file *fp; 429 struct mbuf *mynam; 430 { 431 struct mbuf *m; 432 int siz; 433 struct nfssvc_sock *slp; 434 struct socket *so; 435 struct nfssvc_sock *tslp; 436 int error, s; 437 438 so = (struct socket *)fp->f_data; 439 tslp = (struct nfssvc_sock *)0; 440 /* 441 * Add it to the list, as required. 442 */ 443 if (so->so_proto->pr_protocol == IPPROTO_UDP) { 444 #ifdef INET6 445 if (so->so_proto->pr_domain->dom_family == AF_INET6) 446 tslp = nfs_udp6sock; 447 else 448 #endif 449 tslp = nfs_udpsock; 450 if (tslp->ns_flag & SLP_VALID) { 451 m_freem(mynam); 452 return (EPERM); 453 } 454 #ifdef ISO 455 } else if (so->so_proto->pr_protocol == ISOPROTO_CLTP) { 456 tslp = nfs_cltpsock; 457 if (tslp->ns_flag & SLP_VALID) { 458 m_freem(mynam); 459 return (EPERM); 460 } 461 #endif /* ISO */ 462 } 463 if (so->so_type == SOCK_STREAM) 464 siz = NFS_MAXPACKET + sizeof (u_long); 465 else 466 siz = NFS_MAXPACKET; 467 error = soreserve(so, siz, siz); 468 if (error) { 469 m_freem(mynam); 470 return (error); 471 } 472 473 /* 474 * Set protocol specific options { for now TCP only } and 475 * reserve some space. For datagram sockets, this can get called 476 * repeatedly for the same socket, but that isn't harmful. 477 */ 478 if (so->so_type == SOCK_STREAM) { 479 m = m_get(M_WAIT, MT_SOOPTS); 480 MCLAIM(m, &nfs_mowner); 481 *mtod(m, int32_t *) = 1; 482 m->m_len = sizeof(int32_t); 483 sosetopt(so, SOL_SOCKET, SO_KEEPALIVE, m); 484 } 485 if ((so->so_proto->pr_domain->dom_family == AF_INET 486 #ifdef INET6 487 || so->so_proto->pr_domain->dom_family == AF_INET6 488 #endif 489 ) && 490 so->so_proto->pr_protocol == IPPROTO_TCP) { 491 m = m_get(M_WAIT, MT_SOOPTS); 492 MCLAIM(m, &nfs_mowner); 493 *mtod(m, int32_t *) = 1; 494 m->m_len = sizeof(int32_t); 495 sosetopt(so, IPPROTO_TCP, TCP_NODELAY, m); 496 } 497 so->so_rcv.sb_flags &= ~SB_NOINTR; 498 so->so_rcv.sb_timeo = 0; 499 so->so_snd.sb_flags &= ~SB_NOINTR; 500 so->so_snd.sb_timeo = 0; 501 if (tslp) 502 slp = tslp; 503 else { 504 slp = nfsrv_sockalloc(); 505 } 506 slp->ns_so = so; 507 slp->ns_nam = mynam; 508 fp->f_count++; 509 slp->ns_fp = fp; 510 s = splsoftnet(); 511 so->so_upcallarg = (caddr_t)slp; 512 so->so_upcall = nfsrv_rcv; 513 so->so_rcv.sb_flags |= SB_UPCALL; 514 slp->ns_flag = (SLP_VALID | SLP_NEEDQ); 515 nfsrv_wakenfsd(slp); 516 splx(s); 517 return (0); 518 } 519 520 /* 521 * Called by nfssvc() for nfsds. Just loops around servicing rpc requests 522 * until it is killed by a signal. 523 */ 524 int 525 nfssvc_nfsd(nsd, argp, l) 526 struct nfsd_srvargs *nsd; 527 caddr_t argp; 528 struct lwp *l; 529 { 530 struct mbuf *m; 531 int siz; 532 struct nfssvc_sock *slp; 533 struct nfsd *nfsd = nsd->nsd_nfsd; 534 struct nfsrv_descript *nd = NULL; 535 struct mbuf *mreq; 536 int error = 0, cacherep, s, sotype, writes_todo; 537 u_quad_t cur_usec; 538 struct proc *p = l->l_proc; 539 540 #ifndef nolint 541 cacherep = RC_DOIT; 542 writes_todo = 0; 543 #endif 544 s = splsoftnet(); 545 if (nfsd == (struct nfsd *)0) { 546 nsd->nsd_nfsd = nfsd = (struct nfsd *) 547 malloc(sizeof (struct nfsd), M_NFSD, M_WAITOK); 548 memset((caddr_t)nfsd, 0, sizeof (struct nfsd)); 549 nfsd->nfsd_procp = p; 550 simple_lock(&nfsd_slock); 551 TAILQ_INSERT_TAIL(&nfsd_head, nfsd, nfsd_chain); 552 nfs_numnfsd++; 553 simple_unlock(&nfsd_slock); 554 } 555 PHOLD(l); 556 /* 557 * Loop getting rpc requests until SIGKILL. 558 */ 559 for (;;) { 560 if (nfsd->nfsd_slp == NULL) { 561 simple_lock(&nfsd_slock); 562 while (nfsd->nfsd_slp == NULL && 563 (nfsd_head_flag & NFSD_CHECKSLP) == 0) { 564 SLIST_INSERT_HEAD(&nfsd_idle_head, nfsd, 565 nfsd_idle); 566 nfsd_waiting++; 567 error = ltsleep(nfsd, PSOCK | PCATCH, "nfsd", 568 0, &nfsd_slock); 569 nfsd_waiting--; 570 if (error) { 571 slp = nfsd->nfsd_slp; 572 nfsd->nfsd_slp = NULL; 573 if (!slp) 574 SLIST_REMOVE(&nfsd_idle_head, 575 nfsd, nfsd, nfsd_idle); 576 simple_unlock(&nfsd_slock); 577 if (slp) { 578 nfsrv_wakenfsd(slp); 579 nfsrv_slpderef(slp); 580 } 581 goto done; 582 } 583 } 584 if (nfsd->nfsd_slp == NULL && 585 (nfsd_head_flag & NFSD_CHECKSLP) != 0) { 586 slp = TAILQ_FIRST(&nfssvc_sockpending); 587 if (slp) { 588 KASSERT((slp->ns_flag & 589 (SLP_VALID | SLP_DOREC)) 590 == (SLP_VALID | SLP_DOREC)); 591 TAILQ_REMOVE(&nfssvc_sockpending, slp, 592 ns_pending); 593 slp->ns_flag &= ~SLP_DOREC; 594 slp->ns_sref++; 595 nfsd->nfsd_slp = slp; 596 } else 597 nfsd_head_flag &= ~NFSD_CHECKSLP; 598 } 599 simple_unlock(&nfsd_slock); 600 if ((slp = nfsd->nfsd_slp) == NULL) 601 continue; 602 if (slp->ns_flag & SLP_VALID) { 603 if (slp->ns_flag & SLP_DISCONN) 604 nfsrv_zapsock(slp); 605 else if ((slp->ns_flag & SLP_NEEDQ) != 0) { 606 nfsrv_rcv(slp->ns_so, (void *)slp, 607 M_WAIT); 608 } 609 error = nfsrv_dorec(slp, nfsd, &nd); 610 cur_usec = (u_quad_t)time.tv_sec * 1000000 + 611 (u_quad_t)time.tv_usec; 612 if (error && LIST_FIRST(&slp->ns_tq) && 613 LIST_FIRST(&slp->ns_tq)->nd_time <= 614 cur_usec) { 615 error = 0; 616 cacherep = RC_DOIT; 617 writes_todo = 1; 618 } else 619 writes_todo = 0; 620 if (error == 0 && slp->ns_rec != NULL) { 621 nfsrv_wakenfsd(slp); 622 } 623 } 624 } else { 625 error = 0; 626 slp = nfsd->nfsd_slp; 627 } 628 if (error || (slp->ns_flag & SLP_VALID) == 0) { 629 if (nd) { 630 if (nd->nd_cr != NULL) 631 kauth_cred_destroy(nd->nd_cr); 632 pool_put(&nfs_srvdesc_pool, nd); 633 nd = NULL; 634 } 635 nfsd->nfsd_slp = NULL; 636 nfsrv_slpderef(slp); 637 continue; 638 } 639 splx(s); 640 sotype = slp->ns_so->so_type; 641 if (nd) { 642 nd->nd_starttime = time; 643 if (nd->nd_nam2) 644 nd->nd_nam = nd->nd_nam2; 645 else 646 nd->nd_nam = slp->ns_nam; 647 648 /* 649 * Check to see if authorization is needed. 650 */ 651 if (nfsd->nfsd_flag & NFSD_NEEDAUTH) { 652 nfsd->nfsd_flag &= ~NFSD_NEEDAUTH; 653 nsd->nsd_haddr = mtod(nd->nd_nam, 654 struct sockaddr_in *)->sin_addr.s_addr; 655 nsd->nsd_authlen = nfsd->nfsd_authlen; 656 nsd->nsd_verflen = nfsd->nfsd_verflen; 657 if (!copyout(nfsd->nfsd_authstr, 658 nsd->nsd_authstr, nfsd->nfsd_authlen) && 659 !copyout(nfsd->nfsd_verfstr, 660 nsd->nsd_verfstr, nfsd->nfsd_verflen) && 661 !copyout(nsd, argp, sizeof (*nsd))) { 662 PRELE(l); 663 return (ENEEDAUTH); 664 } 665 cacherep = RC_DROPIT; 666 } else 667 cacherep = nfsrv_getcache(nd, slp, &mreq); 668 669 /* 670 * Check for just starting up for NQNFS and send 671 * fake "try again later" replies to the NQNFS clients. 672 */ 673 if (notstarted && nqnfsstarttime <= time.tv_sec) { 674 if (modify_flag) { 675 nqnfsstarttime = 676 time.tv_sec + nqsrv_writeslack; 677 modify_flag = 0; 678 } else 679 notstarted = 0; 680 } 681 if (notstarted) { 682 if ((nd->nd_flag & ND_NQNFS) == 0) 683 cacherep = RC_DROPIT; 684 else if (nd->nd_procnum != NFSPROC_WRITE) { 685 nd->nd_procnum = NFSPROC_NOOP; 686 nd->nd_repstat = NQNFS_TRYLATER; 687 cacherep = RC_DOIT; 688 } else 689 modify_flag = 1; 690 } else if (nfsd->nfsd_flag & NFSD_AUTHFAIL) { 691 nfsd->nfsd_flag &= ~NFSD_AUTHFAIL; 692 nd->nd_procnum = NFSPROC_NOOP; 693 nd->nd_repstat = 694 (NFSERR_AUTHERR | AUTH_TOOWEAK); 695 cacherep = RC_DOIT; 696 } 697 } 698 699 /* 700 * Loop to get all the write rpc relies that have been 701 * gathered together. 702 */ 703 do { 704 #ifdef DIAGNOSTIC 705 int lockcount; 706 #endif 707 switch (cacherep) { 708 case RC_DOIT: 709 #ifdef DIAGNOSTIC 710 /* 711 * NFS server procs should neither release 712 * locks already held, nor leave things 713 * locked. Catch this sooner, rather than 714 * later (when we try to relock something we 715 * already have locked). Careful inspection 716 * of the failing routine usually turns up the 717 * lock leak.. once we know what it is.. 718 */ 719 lockcount = l->l_locks; 720 #endif 721 mreq = NULL; 722 netexport_rdlock(); 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 netexport_rdunlock(); 733 #ifdef DIAGNOSTIC 734 if (l->l_locks != lockcount) { 735 /* 736 * If you see this panic, audit 737 * nfsrv3_procs[nd->nd_procnum] for 738 * vnode locking errors (usually, it's 739 * due to forgetting to vput() 740 * something). 741 */ 742 #ifdef DEBUG 743 extern void printlockedvnodes(void); 744 printlockedvnodes(); 745 #endif 746 printf("nfsd: locking botch in op %d" 747 " (before %d, after %d)\n", 748 nd ? nd->nd_procnum : -1, 749 lockcount, l->l_locks); 750 } 751 #endif 752 if (mreq == NULL) { 753 if (nd != NULL) { 754 if (nd->nd_nam2) 755 m_free(nd->nd_nam2); 756 if (nd->nd_mrep) 757 m_freem(nd->nd_mrep); 758 } 759 break; 760 } 761 if (error) { 762 if (nd->nd_procnum != NQNFSPROC_VACATED) 763 nfsstats.srv_errs++; 764 nfsrv_updatecache(nd, FALSE, mreq); 765 if (nd->nd_nam2) 766 m_freem(nd->nd_nam2); 767 break; 768 } 769 nfsstats.srvrpccnt[nd->nd_procnum]++; 770 nfsrv_updatecache(nd, TRUE, mreq); 771 nd->nd_mrep = (struct mbuf *)0; 772 case RC_REPLY: 773 m = mreq; 774 siz = 0; 775 while (m) { 776 siz += m->m_len; 777 m = m->m_next; 778 } 779 if (siz <= 0 || siz > NFS_MAXPACKET) { 780 printf("mbuf siz=%d\n",siz); 781 panic("Bad nfs svc reply"); 782 } 783 m = mreq; 784 m->m_pkthdr.len = siz; 785 m->m_pkthdr.rcvif = (struct ifnet *)0; 786 /* 787 * For stream protocols, prepend a Sun RPC 788 * Record Mark. 789 */ 790 if (sotype == SOCK_STREAM) { 791 M_PREPEND(m, NFSX_UNSIGNED, M_WAIT); 792 *mtod(m, u_int32_t *) = 793 htonl(0x80000000 | siz); 794 } 795 nd->nd_mreq = m; 796 if (nfsrtton) { 797 nfsd_rt(slp->ns_so->so_type, nd, 798 cacherep); 799 } 800 s = splsoftnet(); 801 error = nfsdsock_sendreply(slp, nd); 802 nd = NULL; 803 if (error == EPIPE) 804 nfsrv_zapsock(slp); 805 if (error == EINTR || error == ERESTART) { 806 nfsrv_slpderef(slp); 807 goto done; 808 } 809 splx(s); 810 break; 811 case RC_DROPIT: 812 if (nfsrtton) 813 nfsd_rt(sotype, nd, cacherep); 814 m_freem(nd->nd_mrep); 815 m_freem(nd->nd_nam2); 816 break; 817 } 818 if (nd) { 819 if (nd->nd_cr != NULL) 820 kauth_cred_destroy(nd->nd_cr); 821 pool_put(&nfs_srvdesc_pool, nd); 822 nd = NULL; 823 } 824 825 /* 826 * Check to see if there are outstanding writes that 827 * need to be serviced. 828 */ 829 cur_usec = (u_quad_t)time.tv_sec * 1000000 + 830 (u_quad_t)time.tv_usec; 831 s = splsoftclock(); 832 if (LIST_FIRST(&slp->ns_tq) && 833 LIST_FIRST(&slp->ns_tq)->nd_time <= cur_usec) { 834 cacherep = RC_DOIT; 835 writes_todo = 1; 836 } else 837 writes_todo = 0; 838 splx(s); 839 } while (writes_todo); 840 s = splsoftnet(); 841 if (nfsrv_dorec(slp, nfsd, &nd)) { 842 nfsd->nfsd_slp = NULL; 843 nfsrv_slpderef(slp); 844 } 845 } 846 done: 847 PRELE(l); 848 simple_lock(&nfsd_slock); 849 TAILQ_REMOVE(&nfsd_head, nfsd, nfsd_chain); 850 simple_unlock(&nfsd_slock); 851 splx(s); 852 free((caddr_t)nfsd, M_NFSD); 853 nsd->nsd_nfsd = (struct nfsd *)0; 854 if (--nfs_numnfsd == 0) 855 nfsrv_init(TRUE); /* Reinitialize everything */ 856 return (error); 857 } 858 859 /* 860 * Shut down a socket associated with an nfssvc_sock structure. 861 * Should be called with the send lock set, if required. 862 * The trick here is to increment the sref at the start, so that the nfsds 863 * will stop using it and clear ns_flag at the end so that it will not be 864 * reassigned during cleanup. 865 * 866 * called at splsoftnet. 867 */ 868 void 869 nfsrv_zapsock(slp) 870 struct nfssvc_sock *slp; 871 { 872 struct nfsuid *nuidp, *nnuidp; 873 struct nfsrv_descript *nwp, *nnwp; 874 struct socket *so; 875 int s; 876 877 if (nfsdsock_drain(slp)) { 878 return; 879 } 880 simple_lock(&nfsd_slock); 881 if (slp->ns_flag & SLP_DOREC) { 882 TAILQ_REMOVE(&nfssvc_sockpending, slp, ns_pending); 883 } 884 simple_unlock(&nfsd_slock); 885 886 so = slp->ns_so; 887 KASSERT(so != NULL); 888 so->so_upcall = NULL; 889 so->so_upcallarg = NULL; 890 so->so_rcv.sb_flags &= ~SB_UPCALL; 891 soshutdown(so, SHUT_RDWR); 892 893 if (slp->ns_nam) 894 m_free(slp->ns_nam); 895 m_freem(slp->ns_raw); 896 m_freem(slp->ns_rec); 897 for (nuidp = TAILQ_FIRST(&slp->ns_uidlruhead); nuidp != 0; 898 nuidp = nnuidp) { 899 nnuidp = TAILQ_NEXT(nuidp, nu_lru); 900 LIST_REMOVE(nuidp, nu_hash); 901 TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, nu_lru); 902 if (nuidp->nu_flag & NU_NAM) 903 m_freem(nuidp->nu_nam); 904 free((caddr_t)nuidp, M_NFSUID); 905 } 906 s = splsoftclock(); 907 for (nwp = LIST_FIRST(&slp->ns_tq); nwp; nwp = nnwp) { 908 nnwp = LIST_NEXT(nwp, nd_tq); 909 LIST_REMOVE(nwp, nd_tq); 910 if (nwp->nd_cr != NULL) 911 kauth_cred_destroy(nwp->nd_cr); 912 pool_put(&nfs_srvdesc_pool, nwp); 913 } 914 splx(s); 915 } 916 917 /* 918 * Derefence a server socket structure. If it has no more references and 919 * is no longer valid, you can throw it away. 920 */ 921 void 922 nfsrv_slpderef(slp) 923 struct nfssvc_sock *slp; 924 { 925 LOCK_ASSERT(!simple_lock_held(&nfsd_slock)); 926 927 if (--(slp->ns_sref) == 0 && (slp->ns_flag & SLP_VALID) == 0) { 928 struct file *fp; 929 int s = splsoftnet(); 930 simple_lock(&nfsd_slock); 931 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain); 932 simple_unlock(&nfsd_slock); 933 splx(s); 934 935 fp = slp->ns_fp; 936 if (fp != NULL) { 937 slp->ns_fp = NULL; 938 KASSERT(fp != NULL); 939 KASSERT(fp->f_data == slp->ns_so); 940 simple_lock(&fp->f_slock); 941 FILE_USE(fp); 942 closef(fp, (struct lwp *)0); 943 slp->ns_so = NULL; 944 } 945 946 nfsrv_sockfree(slp); 947 } 948 } 949 950 /* 951 * Initialize the data structures for the server. 952 * Handshake with any new nfsds starting up to avoid any chance of 953 * corruption. 954 */ 955 void 956 nfsrv_init(terminating) 957 int terminating; 958 { 959 struct nfssvc_sock *slp; 960 int s; 961 962 s = splsoftnet(); 963 simple_lock(&nfsd_slock); 964 if (nfssvc_sockhead_flag & SLP_INIT) 965 panic("nfsd init"); 966 nfssvc_sockhead_flag |= SLP_INIT; 967 968 if (terminating) { 969 while ((slp = TAILQ_FIRST(&nfssvc_sockhead)) != NULL) { 970 simple_unlock(&nfsd_slock); 971 KASSERT(slp->ns_sref == 0); 972 slp->ns_sref++; 973 nfsrv_zapsock(slp); 974 nfsrv_slpderef(slp); 975 simple_lock(&nfsd_slock); 976 } 977 simple_unlock(&nfsd_slock); 978 splx(s); 979 nfsrv_cleancache(); /* And clear out server cache */ 980 } else { 981 simple_unlock(&nfsd_slock); 982 splx(s); 983 nfs_pub.np_valid = 0; 984 } 985 986 TAILQ_INIT(&nfssvc_sockhead); 987 TAILQ_INIT(&nfssvc_sockpending); 988 nfssvc_sockhead_flag &= ~SLP_INIT; 989 990 TAILQ_INIT(&nfsd_head); 991 SLIST_INIT(&nfsd_idle_head); 992 nfsd_head_flag &= ~NFSD_CHECKSLP; 993 994 nfs_udpsock = nfsrv_sockalloc(); 995 996 #ifdef INET6 997 nfs_udp6sock = nfsrv_sockalloc(); 998 #endif 999 1000 #ifdef ISO 1001 nfs_cltpsock = nfsrv_sockalloc(); 1002 #endif 1003 1004 simple_lock(&nfsd_slock); 1005 if (nfssvc_sockhead_flag & SLP_WANTINIT) { 1006 nfssvc_sockhead_flag &= ~SLP_WANTINIT; 1007 wakeup(&nfssvc_sockhead); 1008 } 1009 simple_unlock(&nfsd_slock); 1010 splx(s); 1011 } 1012 1013 /* 1014 * Add entries to the server monitor log. 1015 */ 1016 static void 1017 nfsd_rt(sotype, nd, cacherep) 1018 int sotype; 1019 struct nfsrv_descript *nd; 1020 int cacherep; 1021 { 1022 struct drt *rt; 1023 1024 rt = &nfsdrt.drt[nfsdrt.pos]; 1025 if (cacherep == RC_DOIT) 1026 rt->flag = 0; 1027 else if (cacherep == RC_REPLY) 1028 rt->flag = DRT_CACHEREPLY; 1029 else 1030 rt->flag = DRT_CACHEDROP; 1031 if (sotype == SOCK_STREAM) 1032 rt->flag |= DRT_TCP; 1033 if (nd->nd_flag & ND_NQNFS) 1034 rt->flag |= DRT_NQNFS; 1035 else if (nd->nd_flag & ND_NFSV3) 1036 rt->flag |= DRT_NFSV3; 1037 rt->proc = nd->nd_procnum; 1038 if (mtod(nd->nd_nam, struct sockaddr *)->sa_family == AF_INET) 1039 rt->ipadr = mtod(nd->nd_nam, struct sockaddr_in *)->sin_addr.s_addr; 1040 else 1041 rt->ipadr = INADDR_ANY; 1042 rt->resptime = ((time.tv_sec - nd->nd_starttime.tv_sec) * 1000000) + 1043 (time.tv_usec - nd->nd_starttime.tv_usec); 1044 rt->tstamp = time; 1045 nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ; 1046 } 1047 #endif /* NFSSERVER */ 1048 1049 #ifdef NFS 1050 1051 int nfs_defect = 0; 1052 /* 1053 * Asynchronous I/O threads for client nfs. 1054 * They do read-ahead and write-behind operations on the block I/O cache. 1055 * Never returns unless it fails or gets killed. 1056 */ 1057 1058 int 1059 nfssvc_iod(l) 1060 struct lwp *l; 1061 { 1062 struct buf *bp; 1063 int i; 1064 struct nfs_iod *myiod; 1065 struct nfsmount *nmp; 1066 int error = 0; 1067 struct proc *p = l ? l->l_proc : NULL; 1068 1069 /* 1070 * Assign my position or return error if too many already running 1071 */ 1072 myiod = NULL; 1073 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) 1074 if (nfs_asyncdaemon[i].nid_proc == NULL) { 1075 myiod = &nfs_asyncdaemon[i]; 1076 break; 1077 } 1078 if (myiod == NULL) 1079 return (EBUSY); 1080 myiod->nid_proc = p; 1081 nfs_numasync++; 1082 PHOLD(l); 1083 /* 1084 * Just loop around doing our stuff until SIGKILL 1085 */ 1086 for (;;) { 1087 while (/*CONSTCOND*/ TRUE) { 1088 simple_lock(&myiod->nid_slock); 1089 nmp = myiod->nid_mount; 1090 if (nmp) { 1091 simple_lock(&nmp->nm_slock); 1092 if (!TAILQ_EMPTY(&nmp->nm_bufq)) { 1093 simple_unlock(&myiod->nid_slock); 1094 break; 1095 } 1096 nmp->nm_bufqiods--; 1097 simple_unlock(&nmp->nm_slock); 1098 } 1099 myiod->nid_want = p; 1100 myiod->nid_mount = NULL; 1101 error = ltsleep(&myiod->nid_want, 1102 PWAIT | PCATCH | PNORELOCK, "nfsidl", 0, 1103 &myiod->nid_slock); 1104 if (error) 1105 goto quit; 1106 } 1107 1108 while ((bp = TAILQ_FIRST(&nmp->nm_bufq)) != NULL) { 1109 /* Take one off the front of the list */ 1110 TAILQ_REMOVE(&nmp->nm_bufq, bp, b_freelist); 1111 nmp->nm_bufqlen--; 1112 if (nmp->nm_bufqwant && 1113 nmp->nm_bufqlen < 2 * nfs_numasync) { 1114 nmp->nm_bufqwant = FALSE; 1115 wakeup(&nmp->nm_bufq); 1116 } 1117 simple_unlock(&nmp->nm_slock); 1118 (void)nfs_doio(bp); 1119 simple_lock(&nmp->nm_slock); 1120 /* 1121 * If there are more than one iod on this mount, 1122 * then defect so that the iods can be shared out 1123 * fairly between the mounts 1124 */ 1125 if (nfs_defect && nmp->nm_bufqiods > 1) { 1126 myiod->nid_mount = NULL; 1127 nmp->nm_bufqiods--; 1128 break; 1129 } 1130 } 1131 simple_unlock(&nmp->nm_slock); 1132 } 1133 quit: 1134 PRELE(l); 1135 if (nmp) 1136 nmp->nm_bufqiods--; 1137 myiod->nid_want = NULL; 1138 myiod->nid_mount = NULL; 1139 myiod->nid_proc = NULL; 1140 nfs_numasync--; 1141 1142 return error; 1143 } 1144 1145 void 1146 nfs_iodinit() 1147 { 1148 int i; 1149 1150 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) 1151 simple_lock_init(&nfs_asyncdaemon[i].nid_slock); 1152 } 1153 1154 void 1155 start_nfsio(arg) 1156 void *arg; 1157 { 1158 nfssvc_iod(curlwp); 1159 1160 kthread_exit(0); 1161 } 1162 1163 void 1164 nfs_getset_niothreads(set) 1165 int set; 1166 { 1167 int i, have, start; 1168 1169 for (have = 0, i = 0; i < NFS_MAXASYNCDAEMON; i++) 1170 if (nfs_asyncdaemon[i].nid_proc != NULL) 1171 have++; 1172 1173 if (set) { 1174 /* clamp to sane range */ 1175 nfs_niothreads = max(0, min(nfs_niothreads, NFS_MAXASYNCDAEMON)); 1176 1177 start = nfs_niothreads - have; 1178 1179 while (start > 0) { 1180 kthread_create1(start_nfsio, NULL, NULL, "nfsio"); 1181 start--; 1182 } 1183 1184 for (i = 0; (start < 0) && (i < NFS_MAXASYNCDAEMON); i++) 1185 if (nfs_asyncdaemon[i].nid_proc != NULL) { 1186 psignal(nfs_asyncdaemon[i].nid_proc, SIGKILL); 1187 start++; 1188 } 1189 } else { 1190 if (nfs_niothreads >= 0) 1191 nfs_niothreads = have; 1192 } 1193 } 1194 1195 /* 1196 * Get an authorization string for the uid by having the mount_nfs sitting 1197 * on this mount point porpous out of the kernel and do it. 1198 */ 1199 int 1200 nfs_getauth(nmp, rep, cred, auth_str, auth_len, verf_str, verf_len, key) 1201 struct nfsmount *nmp; 1202 struct nfsreq *rep; 1203 kauth_cred_t cred; 1204 char **auth_str; 1205 int *auth_len; 1206 char *verf_str; 1207 int *verf_len; 1208 NFSKERBKEY_T key; /* return session key */ 1209 { 1210 int error = 0; 1211 1212 while ((nmp->nm_iflag & NFSMNT_WAITAUTH) == 0) { 1213 nmp->nm_iflag |= NFSMNT_WANTAUTH; 1214 (void) tsleep((caddr_t)&nmp->nm_authtype, PSOCK, 1215 "nfsauth1", 2 * hz); 1216 error = nfs_sigintr(nmp, rep, rep->r_lwp); 1217 if (error) { 1218 nmp->nm_iflag &= ~NFSMNT_WANTAUTH; 1219 return (error); 1220 } 1221 } 1222 nmp->nm_iflag &= ~(NFSMNT_WAITAUTH | NFSMNT_WANTAUTH); 1223 nmp->nm_authstr = *auth_str = (char *)malloc(RPCAUTH_MAXSIZ, M_TEMP, M_WAITOK); 1224 nmp->nm_authlen = RPCAUTH_MAXSIZ; 1225 nmp->nm_verfstr = verf_str; 1226 nmp->nm_verflen = *verf_len; 1227 nmp->nm_authuid = kauth_cred_geteuid(cred); 1228 wakeup((caddr_t)&nmp->nm_authstr); 1229 1230 /* 1231 * And wait for mount_nfs to do its stuff. 1232 */ 1233 while ((nmp->nm_iflag & NFSMNT_HASAUTH) == 0 && error == 0) { 1234 (void) tsleep((caddr_t)&nmp->nm_authlen, PSOCK, 1235 "nfsauth2", 2 * hz); 1236 error = nfs_sigintr(nmp, rep, rep->r_lwp); 1237 } 1238 if (nmp->nm_iflag & NFSMNT_AUTHERR) { 1239 nmp->nm_iflag &= ~NFSMNT_AUTHERR; 1240 error = EAUTH; 1241 } 1242 if (error) 1243 free((caddr_t)*auth_str, M_TEMP); 1244 else { 1245 *auth_len = nmp->nm_authlen; 1246 *verf_len = nmp->nm_verflen; 1247 memcpy(key, nmp->nm_key, sizeof (NFSKERBKEY_T)); 1248 } 1249 nmp->nm_iflag &= ~NFSMNT_HASAUTH; 1250 nmp->nm_iflag |= NFSMNT_WAITAUTH; 1251 if (nmp->nm_iflag & NFSMNT_WANTAUTH) { 1252 nmp->nm_iflag &= ~NFSMNT_WANTAUTH; 1253 wakeup((caddr_t)&nmp->nm_authtype); 1254 } 1255 return (error); 1256 } 1257 1258 /* 1259 * Get a nickname authenticator and verifier. 1260 */ 1261 int 1262 nfs_getnickauth(nmp, cred, auth_str, auth_len, verf_str, verf_len) 1263 struct nfsmount *nmp; 1264 kauth_cred_t cred; 1265 char **auth_str; 1266 int *auth_len; 1267 char *verf_str; 1268 int verf_len; 1269 { 1270 struct nfsuid *nuidp; 1271 u_int32_t *nickp, *verfp; 1272 struct timeval ktvin, ktvout; 1273 1274 #ifdef DIAGNOSTIC 1275 if (verf_len < (4 * NFSX_UNSIGNED)) 1276 panic("nfs_getnickauth verf too small"); 1277 #endif 1278 LIST_FOREACH(nuidp, NMUIDHASH(nmp, kauth_cred_geteuid(cred)), nu_hash) { 1279 if (kauth_cred_geteuid(nuidp->nu_cr) == kauth_cred_geteuid(cred)) 1280 break; 1281 } 1282 if (!nuidp || nuidp->nu_expire < time.tv_sec) 1283 return (EACCES); 1284 1285 /* 1286 * Move to the end of the lru list (end of lru == most recently used). 1287 */ 1288 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru); 1289 TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, nu_lru); 1290 1291 nickp = (u_int32_t *)malloc(2 * NFSX_UNSIGNED, M_TEMP, M_WAITOK); 1292 *nickp++ = txdr_unsigned(RPCAKN_NICKNAME); 1293 *nickp = txdr_unsigned(nuidp->nu_nickname); 1294 *auth_str = (char *)nickp; 1295 *auth_len = 2 * NFSX_UNSIGNED; 1296 1297 /* 1298 * Now we must encrypt the verifier and package it up. 1299 */ 1300 verfp = (u_int32_t *)verf_str; 1301 *verfp++ = txdr_unsigned(RPCAKN_NICKNAME); 1302 if (time.tv_sec > nuidp->nu_timestamp.tv_sec || 1303 (time.tv_sec == nuidp->nu_timestamp.tv_sec && 1304 time.tv_usec > nuidp->nu_timestamp.tv_usec)) 1305 nuidp->nu_timestamp = time; 1306 else 1307 nuidp->nu_timestamp.tv_usec++; 1308 ktvin.tv_sec = txdr_unsigned(nuidp->nu_timestamp.tv_sec); 1309 ktvin.tv_usec = txdr_unsigned(nuidp->nu_timestamp.tv_usec); 1310 1311 /* 1312 * Now encrypt the timestamp verifier in ecb mode using the session 1313 * key. 1314 */ 1315 #ifdef NFSKERB 1316 XXX 1317 #endif 1318 1319 *verfp++ = ktvout.tv_sec; 1320 *verfp++ = ktvout.tv_usec; 1321 *verfp = 0; 1322 return (0); 1323 } 1324 1325 /* 1326 * Save the current nickname in a hash list entry on the mount point. 1327 */ 1328 int 1329 nfs_savenickauth(nmp, cred, len, key, mdp, dposp, mrep) 1330 struct nfsmount *nmp; 1331 kauth_cred_t cred; 1332 int len; 1333 NFSKERBKEY_T key; 1334 struct mbuf **mdp; 1335 char **dposp; 1336 struct mbuf *mrep; 1337 { 1338 struct nfsuid *nuidp; 1339 u_int32_t *tl; 1340 int32_t t1; 1341 struct mbuf *md = *mdp; 1342 struct timeval ktvin, ktvout; 1343 u_int32_t nick; 1344 char *dpos = *dposp, *cp2; 1345 int deltasec, error = 0; 1346 1347 if (len == (3 * NFSX_UNSIGNED)) { 1348 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 1349 ktvin.tv_sec = *tl++; 1350 ktvin.tv_usec = *tl++; 1351 nick = fxdr_unsigned(u_int32_t, *tl); 1352 1353 /* 1354 * Decrypt the timestamp in ecb mode. 1355 */ 1356 #ifdef NFSKERB 1357 XXX 1358 #endif 1359 ktvout.tv_sec = fxdr_unsigned(long, ktvout.tv_sec); 1360 ktvout.tv_usec = fxdr_unsigned(long, ktvout.tv_usec); 1361 deltasec = time.tv_sec - ktvout.tv_sec; 1362 if (deltasec < 0) 1363 deltasec = -deltasec; 1364 /* 1365 * If ok, add it to the hash list for the mount point. 1366 */ 1367 if (deltasec <= NFS_KERBCLOCKSKEW) { 1368 if (nmp->nm_numuids < nuidhash_max) { 1369 nmp->nm_numuids++; 1370 nuidp = (struct nfsuid *) 1371 malloc(sizeof (struct nfsuid), M_NFSUID, 1372 M_WAITOK); 1373 } else { 1374 nuidp = TAILQ_FIRST(&nmp->nm_uidlruhead); 1375 LIST_REMOVE(nuidp, nu_hash); 1376 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, 1377 nu_lru); 1378 } 1379 nuidp->nu_flag = 0; 1380 kauth_cred_seteuid(nuidp->nu_cr, kauth_cred_geteuid(cred)); 1381 nuidp->nu_expire = time.tv_sec + NFS_KERBTTL; 1382 nuidp->nu_timestamp = ktvout; 1383 nuidp->nu_nickname = nick; 1384 memcpy(nuidp->nu_key, key, sizeof (NFSKERBKEY_T)); 1385 TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, 1386 nu_lru); 1387 LIST_INSERT_HEAD(NMUIDHASH(nmp, kauth_cred_geteuid(cred)), 1388 nuidp, nu_hash); 1389 } 1390 } else 1391 nfsm_adv(nfsm_rndup(len)); 1392 nfsmout: 1393 *mdp = md; 1394 *dposp = dpos; 1395 return (error); 1396 } 1397 #endif /* NFS */ 1398
Indexes created Mon Oct 20 20:10:13 GMT 2025