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sys/nfs/nfs_syscalls.c
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1 /* $NetBSD: nfs_syscalls.c,v 1.78 2005/02/26 22:39:50 perry 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 1.78 2005/02/26 22:39:50 perry 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 #ifdef NFSSERVER 183 s = splsoftnet(); 184 simple_lock(&nfsd_slock); 185 while (nfssvc_sockhead_flag & SLP_INIT) { 186 nfssvc_sockhead_flag |= SLP_WANTINIT; 187 (void) ltsleep(&nfssvc_sockhead, PSOCK, "nfsd init", 0, 188 &nfsd_slock); 189 } 190 simple_unlock(&nfsd_slock); 191 splx(s); 192 #endif 193 if (SCARG(uap, flag) & NFSSVC_BIOD) { 194 #if defined(NFS) && defined(COMPAT_14) 195 error = nfssvc_iod(l); 196 #else 197 error = ENOSYS; 198 #endif 199 } else if (SCARG(uap, flag) & NFSSVC_MNTD) { 200 #ifndef NFS 201 error = ENOSYS; 202 #else 203 error = copyin(SCARG(uap, argp), (caddr_t)&ncd, sizeof (ncd)); 204 if (error) 205 return (error); 206 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 207 ncd.ncd_dirp, p); 208 error = namei(&nd); 209 if (error) 210 return (error); 211 if ((nd.ni_vp->v_flag & VROOT) == 0) 212 error = EINVAL; 213 nmp = VFSTONFS(nd.ni_vp->v_mount); 214 vput(nd.ni_vp); 215 if (error) 216 return (error); 217 if ((nmp->nm_iflag & NFSMNT_MNTD) && 218 (SCARG(uap, flag) & NFSSVC_GOTAUTH) == 0) 219 return (0); 220 nmp->nm_iflag |= NFSMNT_MNTD; 221 error = nqnfs_clientd(nmp, p->p_ucred, &ncd, SCARG(uap, flag), 222 SCARG(uap, argp), l); 223 #endif /* NFS */ 224 } else if (SCARG(uap, flag) & NFSSVC_ADDSOCK) { 225 #ifndef NFSSERVER 226 error = ENOSYS; 227 #else 228 error = copyin(SCARG(uap, argp), (caddr_t)&nfsdarg, 229 sizeof(nfsdarg)); 230 if (error) 231 return (error); 232 /* getsock() will use the descriptor for us */ 233 error = getsock(p->p_fd, nfsdarg.sock, &fp); 234 if (error) 235 return (error); 236 /* 237 * Get the client address for connected sockets. 238 */ 239 if (nfsdarg.name == NULL || nfsdarg.namelen == 0) 240 nam = (struct mbuf *)0; 241 else { 242 error = sockargs(&nam, nfsdarg.name, nfsdarg.namelen, 243 MT_SONAME); 244 if (error) { 245 FILE_UNUSE(fp, NULL); 246 return (error); 247 } 248 } 249 error = nfssvc_addsock(fp, nam); 250 FILE_UNUSE(fp, NULL); 251 #endif /* !NFSSERVER */ 252 } else { 253 #ifndef NFSSERVER 254 error = ENOSYS; 255 #else 256 error = copyin(SCARG(uap, argp), (caddr_t)nsd, sizeof (*nsd)); 257 if (error) 258 return (error); 259 if ((SCARG(uap, flag) & NFSSVC_AUTHIN) && 260 ((nfsd = nsd->nsd_nfsd)) != NULL && 261 (nfsd->nfsd_slp->ns_flag & SLP_VALID)) { 262 slp = nfsd->nfsd_slp; 263 264 /* 265 * First check to see if another nfsd has already 266 * added this credential. 267 */ 268 LIST_FOREACH(nuidp, NUIDHASH(slp,nsd->nsd_cr.cr_uid), 269 nu_hash) { 270 if (nuidp->nu_cr.cr_uid == nsd->nsd_cr.cr_uid && 271 (!nfsd->nfsd_nd->nd_nam2 || 272 netaddr_match(NU_NETFAM(nuidp), 273 &nuidp->nu_haddr, nfsd->nfsd_nd->nd_nam2))) 274 break; 275 } 276 if (nuidp) { 277 nfsrv_setcred(&nuidp->nu_cr,&nfsd->nfsd_nd->nd_cr); 278 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL; 279 } else { 280 /* 281 * Nope, so we will. 282 */ 283 if (slp->ns_numuids < nuidhash_max) { 284 slp->ns_numuids++; 285 nuidp = (struct nfsuid *) 286 malloc(sizeof (struct nfsuid), M_NFSUID, 287 M_WAITOK); 288 } else 289 nuidp = (struct nfsuid *)0; 290 if ((slp->ns_flag & SLP_VALID) == 0) { 291 if (nuidp) 292 free((caddr_t)nuidp, M_NFSUID); 293 } else { 294 if (nuidp == (struct nfsuid *)0) { 295 nuidp = TAILQ_FIRST(&slp->ns_uidlruhead); 296 LIST_REMOVE(nuidp, nu_hash); 297 TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, 298 nu_lru); 299 if (nuidp->nu_flag & NU_NAM) 300 m_freem(nuidp->nu_nam); 301 } 302 nuidp->nu_flag = 0; 303 crcvt(&nuidp->nu_cr, &nsd->nsd_cr); 304 if (nuidp->nu_cr.cr_ngroups > NGROUPS) 305 nuidp->nu_cr.cr_ngroups = NGROUPS; 306 nuidp->nu_cr.cr_ref = 1; 307 nuidp->nu_timestamp = nsd->nsd_timestamp; 308 nuidp->nu_expire = time.tv_sec + nsd->nsd_ttl; 309 /* 310 * and save the session key in nu_key. 311 */ 312 memcpy(nuidp->nu_key, nsd->nsd_key, 313 sizeof(nsd->nsd_key)); 314 if (nfsd->nfsd_nd->nd_nam2) { 315 struct sockaddr_in *saddr; 316 317 saddr = mtod(nfsd->nfsd_nd->nd_nam2, 318 struct sockaddr_in *); 319 switch (saddr->sin_family) { 320 case AF_INET: 321 nuidp->nu_flag |= NU_INETADDR; 322 nuidp->nu_inetaddr = 323 saddr->sin_addr.s_addr; 324 break; 325 case AF_ISO: 326 default: 327 nuidp->nu_flag |= NU_NAM; 328 nuidp->nu_nam = m_copym( 329 nfsd->nfsd_nd->nd_nam2, 0, 330 M_COPYALL, M_WAIT); 331 break; 332 }; 333 } 334 TAILQ_INSERT_TAIL(&slp->ns_uidlruhead, nuidp, 335 nu_lru); 336 LIST_INSERT_HEAD(NUIDHASH(slp, nsd->nsd_uid), 337 nuidp, nu_hash); 338 nfsrv_setcred(&nuidp->nu_cr, 339 &nfsd->nfsd_nd->nd_cr); 340 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL; 341 } 342 } 343 } 344 if ((SCARG(uap, flag) & NFSSVC_AUTHINFAIL) && 345 (nfsd = nsd->nsd_nfsd)) 346 nfsd->nfsd_flag |= NFSD_AUTHFAIL; 347 error = nfssvc_nfsd(nsd, SCARG(uap, argp), l); 348 #endif /* !NFSSERVER */ 349 } 350 if (error == EINTR || error == ERESTART) 351 error = 0; 352 return (error); 353 } 354 355 #ifdef NFSSERVER 356 MALLOC_DEFINE(M_NFSD, "NFS daemon", "Nfs server daemon structure"); 357 MALLOC_DEFINE(M_NFSSVC, "NFS srvsock", "Nfs server structure"); 358 struct pool nfs_srvdesc_pool; 359 360 static struct nfssvc_sock * 361 nfsrv_sockalloc() 362 { 363 struct nfssvc_sock *slp; 364 int s; 365 366 slp = (struct nfssvc_sock *) 367 malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK); 368 memset(slp, 0, sizeof (struct nfssvc_sock)); 369 TAILQ_INIT(&slp->ns_uidlruhead); 370 s = splsoftnet(); 371 simple_lock(&nfsd_slock); 372 TAILQ_INSERT_TAIL(&nfssvc_sockhead, slp, ns_chain); 373 simple_unlock(&nfsd_slock); 374 splx(s); 375 376 return slp; 377 } 378 379 static void 380 nfsrv_sockfree(struct nfssvc_sock *slp) 381 { 382 383 KASSERT(slp->ns_so == NULL); 384 KASSERT(slp->ns_fp == NULL); 385 KASSERT((slp->ns_flag & SLP_ALLFLAGS) == 0); 386 free(slp, M_NFSSVC); 387 } 388 389 /* 390 * Adds a socket to the list for servicing by nfsds. 391 */ 392 int 393 nfssvc_addsock(fp, mynam) 394 struct file *fp; 395 struct mbuf *mynam; 396 { 397 struct mbuf *m; 398 int siz; 399 struct nfssvc_sock *slp; 400 struct socket *so; 401 struct nfssvc_sock *tslp; 402 int error, s; 403 404 so = (struct socket *)fp->f_data; 405 tslp = (struct nfssvc_sock *)0; 406 /* 407 * Add it to the list, as required. 408 */ 409 if (so->so_proto->pr_protocol == IPPROTO_UDP) { 410 #ifdef INET6 411 if (so->so_proto->pr_domain->dom_family == AF_INET6) 412 tslp = nfs_udp6sock; 413 else 414 #endif 415 tslp = nfs_udpsock; 416 if (tslp->ns_flag & SLP_VALID) { 417 m_freem(mynam); 418 return (EPERM); 419 } 420 #ifdef ISO 421 } else if (so->so_proto->pr_protocol == ISOPROTO_CLTP) { 422 tslp = nfs_cltpsock; 423 if (tslp->ns_flag & SLP_VALID) { 424 m_freem(mynam); 425 return (EPERM); 426 } 427 #endif /* ISO */ 428 } 429 if (so->so_type == SOCK_STREAM) 430 siz = NFS_MAXPACKET + sizeof (u_long); 431 else 432 siz = NFS_MAXPACKET; 433 error = soreserve(so, siz, siz); 434 if (error) { 435 m_freem(mynam); 436 return (error); 437 } 438 439 /* 440 * Set protocol specific options { for now TCP only } and 441 * reserve some space. For datagram sockets, this can get called 442 * repeatedly for the same socket, but that isn't harmful. 443 */ 444 if (so->so_type == SOCK_STREAM) { 445 m = m_get(M_WAIT, MT_SOOPTS); 446 MCLAIM(m, &nfs_mowner); 447 *mtod(m, int32_t *) = 1; 448 m->m_len = sizeof(int32_t); 449 sosetopt(so, SOL_SOCKET, SO_KEEPALIVE, m); 450 } 451 if ((so->so_proto->pr_domain->dom_family == AF_INET 452 #ifdef INET6 453 || so->so_proto->pr_domain->dom_family == AF_INET6 454 #endif 455 ) && 456 so->so_proto->pr_protocol == IPPROTO_TCP) { 457 m = m_get(M_WAIT, MT_SOOPTS); 458 MCLAIM(m, &nfs_mowner); 459 *mtod(m, int32_t *) = 1; 460 m->m_len = sizeof(int32_t); 461 sosetopt(so, IPPROTO_TCP, TCP_NODELAY, m); 462 } 463 so->so_rcv.sb_flags &= ~SB_NOINTR; 464 so->so_rcv.sb_timeo = 0; 465 so->so_snd.sb_flags &= ~SB_NOINTR; 466 so->so_snd.sb_timeo = 0; 467 if (tslp) 468 slp = tslp; 469 else { 470 slp = nfsrv_sockalloc(); 471 } 472 slp->ns_so = so; 473 slp->ns_nam = mynam; 474 fp->f_count++; 475 slp->ns_fp = fp; 476 s = splsoftnet(); 477 so->so_upcallarg = (caddr_t)slp; 478 so->so_upcall = nfsrv_rcv; 479 so->so_rcv.sb_flags |= SB_UPCALL; 480 slp->ns_flag = (SLP_VALID | SLP_NEEDQ); 481 nfsrv_wakenfsd(slp); 482 splx(s); 483 return (0); 484 } 485 486 /* 487 * Called by nfssvc() for nfsds. Just loops around servicing rpc requests 488 * until it is killed by a signal. 489 */ 490 int 491 nfssvc_nfsd(nsd, argp, l) 492 struct nfsd_srvargs *nsd; 493 caddr_t argp; 494 struct lwp *l; 495 { 496 struct mbuf *m; 497 int siz; 498 struct nfssvc_sock *slp; 499 struct socket *so; 500 int *solockp; 501 struct nfsd *nfsd = nsd->nsd_nfsd; 502 struct nfsrv_descript *nd = NULL; 503 struct mbuf *mreq; 504 int error = 0, cacherep, s, sotype, writes_todo; 505 u_quad_t cur_usec; 506 struct proc *p = l->l_proc; 507 508 #ifndef nolint 509 cacherep = RC_DOIT; 510 writes_todo = 0; 511 #endif 512 s = splsoftnet(); 513 if (nfsd == (struct nfsd *)0) { 514 nsd->nsd_nfsd = nfsd = (struct nfsd *) 515 malloc(sizeof (struct nfsd), M_NFSD, M_WAITOK); 516 memset((caddr_t)nfsd, 0, sizeof (struct nfsd)); 517 nfsd->nfsd_procp = p; 518 simple_lock(&nfsd_slock); 519 TAILQ_INSERT_TAIL(&nfsd_head, nfsd, nfsd_chain); 520 nfs_numnfsd++; 521 simple_unlock(&nfsd_slock); 522 } 523 PHOLD(l); 524 /* 525 * Loop getting rpc requests until SIGKILL. 526 */ 527 for (;;) { 528 if ((nfsd->nfsd_flag & NFSD_REQINPROG) == 0) { 529 simple_lock(&nfsd_slock); 530 while (nfsd->nfsd_slp == (struct nfssvc_sock *)0 && 531 (nfsd_head_flag & NFSD_CHECKSLP) == 0) { 532 SLIST_INSERT_HEAD(&nfsd_idle_head, nfsd, 533 nfsd_idle); 534 nfsd->nfsd_flag |= NFSD_WAITING; 535 nfsd_waiting++; 536 error = ltsleep(nfsd, PSOCK | PCATCH, "nfsd", 537 0, &nfsd_slock); 538 nfsd_waiting--; 539 if (error) { 540 slp = nfsd->nfsd_slp; 541 nfsd->nfsd_slp = NULL; 542 if (!slp) 543 SLIST_REMOVE(&nfsd_idle_head, 544 nfsd, nfsd, nfsd_idle); 545 simple_unlock(&nfsd_slock); 546 if (slp) { 547 nfsrv_wakenfsd(slp); 548 nfsrv_slpderef(slp); 549 } 550 goto done; 551 } 552 } 553 if (nfsd->nfsd_slp == (struct nfssvc_sock *)0 && 554 (nfsd_head_flag & NFSD_CHECKSLP) != 0) { 555 slp = TAILQ_FIRST(&nfssvc_sockpending); 556 if (slp) { 557 KASSERT((slp->ns_flag & 558 (SLP_VALID | SLP_DOREC)) 559 == (SLP_VALID | SLP_DOREC)); 560 TAILQ_REMOVE(&nfssvc_sockpending, slp, 561 ns_pending); 562 slp->ns_flag &= ~SLP_DOREC; 563 slp->ns_sref++; 564 nfsd->nfsd_slp = slp; 565 } else 566 nfsd_head_flag &= ~NFSD_CHECKSLP; 567 } 568 simple_unlock(&nfsd_slock); 569 if ((slp = nfsd->nfsd_slp) == (struct nfssvc_sock *)0) 570 continue; 571 if (slp->ns_flag & SLP_VALID) { 572 if (slp->ns_flag & SLP_DISCONN) 573 nfsrv_zapsock(slp); 574 else if (slp->ns_flag & SLP_NEEDQ) { 575 slp->ns_flag &= ~SLP_NEEDQ; 576 (void) nfs_sndlock(&slp->ns_solock, 577 (struct nfsreq *)0); 578 nfsrv_rcv(slp->ns_so, (caddr_t)slp, 579 M_WAIT); 580 nfs_sndunlock(&slp->ns_solock); 581 } 582 error = nfsrv_dorec(slp, nfsd, &nd); 583 cur_usec = (u_quad_t)time.tv_sec * 1000000 + 584 (u_quad_t)time.tv_usec; 585 if (error && LIST_FIRST(&slp->ns_tq) && 586 LIST_FIRST(&slp->ns_tq)->nd_time <= 587 cur_usec) { 588 error = 0; 589 cacherep = RC_DOIT; 590 writes_todo = 1; 591 } else 592 writes_todo = 0; 593 nfsd->nfsd_flag |= NFSD_REQINPROG; 594 } 595 } else { 596 error = 0; 597 slp = nfsd->nfsd_slp; 598 } 599 if (error || (slp->ns_flag & SLP_VALID) == 0) { 600 if (nd) { 601 pool_put(&nfs_srvdesc_pool, nd); 602 nd = NULL; 603 } 604 nfsd->nfsd_slp = (struct nfssvc_sock *)0; 605 nfsd->nfsd_flag &= ~NFSD_REQINPROG; 606 nfsrv_slpderef(slp); 607 continue; 608 } 609 splx(s); 610 so = slp->ns_so; 611 sotype = so->so_type; 612 if (so->so_proto->pr_flags & PR_CONNREQUIRED) 613 solockp = &slp->ns_solock; 614 else 615 solockp = (int *)0; 616 if (nd) { 617 nd->nd_starttime = time; 618 if (nd->nd_nam2) 619 nd->nd_nam = nd->nd_nam2; 620 else 621 nd->nd_nam = slp->ns_nam; 622 623 /* 624 * Check to see if authorization is needed. 625 */ 626 if (nfsd->nfsd_flag & NFSD_NEEDAUTH) { 627 nfsd->nfsd_flag &= ~NFSD_NEEDAUTH; 628 nsd->nsd_haddr = mtod(nd->nd_nam, 629 struct sockaddr_in *)->sin_addr.s_addr; 630 nsd->nsd_authlen = nfsd->nfsd_authlen; 631 nsd->nsd_verflen = nfsd->nfsd_verflen; 632 if (!copyout(nfsd->nfsd_authstr, 633 nsd->nsd_authstr, nfsd->nfsd_authlen) && 634 !copyout(nfsd->nfsd_verfstr, 635 nsd->nsd_verfstr, nfsd->nfsd_verflen) && 636 !copyout(nsd, argp, sizeof (*nsd))) { 637 PRELE(l); 638 return (ENEEDAUTH); 639 } 640 cacherep = RC_DROPIT; 641 } else 642 cacherep = nfsrv_getcache(nd, slp, &mreq); 643 644 /* 645 * Check for just starting up for NQNFS and send 646 * fake "try again later" replies to the NQNFS clients. 647 */ 648 if (notstarted && nqnfsstarttime <= time.tv_sec) { 649 if (modify_flag) { 650 nqnfsstarttime = 651 time.tv_sec + nqsrv_writeslack; 652 modify_flag = 0; 653 } else 654 notstarted = 0; 655 } 656 if (notstarted) { 657 if ((nd->nd_flag & ND_NQNFS) == 0) 658 cacherep = RC_DROPIT; 659 else if (nd->nd_procnum != NFSPROC_WRITE) { 660 nd->nd_procnum = NFSPROC_NOOP; 661 nd->nd_repstat = NQNFS_TRYLATER; 662 cacherep = RC_DOIT; 663 } else 664 modify_flag = 1; 665 } else if (nfsd->nfsd_flag & NFSD_AUTHFAIL) { 666 nfsd->nfsd_flag &= ~NFSD_AUTHFAIL; 667 nd->nd_procnum = NFSPROC_NOOP; 668 nd->nd_repstat = 669 (NFSERR_AUTHERR | AUTH_TOOWEAK); 670 cacherep = RC_DOIT; 671 } 672 } 673 674 /* 675 * Loop to get all the write rpc relies that have been 676 * gathered together. 677 */ 678 do { 679 #ifdef DIAGNOSTIC 680 int lockcount; 681 #endif 682 switch (cacherep) { 683 case RC_DOIT: 684 #ifdef DIAGNOSTIC 685 /* 686 * NFS server procs should neither release 687 * locks already held, nor leave things 688 * locked. Catch this sooner, rather than 689 * later (when we try to relock something we 690 * already have locked). Careful inspection 691 * of the failing routine usually turns up the 692 * lock leak.. once we know what it is.. 693 */ 694 lockcount = l->l_locks; 695 #endif 696 if (writes_todo || (!(nd->nd_flag & ND_NFSV3) && 697 nd->nd_procnum == NFSPROC_WRITE && 698 nfsrvw_procrastinate > 0 && !notstarted)) 699 error = nfsrv_writegather(&nd, slp, 700 nfsd->nfsd_procp, &mreq); 701 else 702 error = 703 (*(nfsrv3_procs[nd->nd_procnum])) 704 (nd, slp, nfsd->nfsd_procp, &mreq); 705 #ifdef DIAGNOSTIC 706 if (l->l_locks != lockcount) { 707 /* 708 * If you see this panic, audit 709 * nfsrv3_procs[nd->nd_procnum] for 710 * vnode locking errors (usually, it's 711 * due to forgetting to vput() 712 * something). 713 */ 714 #ifdef DEBUG 715 extern void printlockedvnodes(void); 716 printlockedvnodes(); 717 #endif 718 printf("nfsd: locking botch in op %d" 719 " (before %d, after %d)\n", 720 nd ? nd->nd_procnum : -1, 721 lockcount, l->l_locks); 722 } 723 #endif 724 if (mreq == NULL) 725 break; 726 if (error) { 727 if (nd->nd_procnum != NQNFSPROC_VACATED) 728 nfsstats.srv_errs++; 729 nfsrv_updatecache(nd, FALSE, mreq); 730 if (nd->nd_nam2) 731 m_freem(nd->nd_nam2); 732 break; 733 } 734 nfsstats.srvrpccnt[nd->nd_procnum]++; 735 nfsrv_updatecache(nd, TRUE, mreq); 736 nd->nd_mrep = (struct mbuf *)0; 737 case RC_REPLY: 738 m = mreq; 739 siz = 0; 740 while (m) { 741 siz += m->m_len; 742 m = m->m_next; 743 } 744 if (siz <= 0 || siz > NFS_MAXPACKET) { 745 printf("mbuf siz=%d\n",siz); 746 panic("Bad nfs svc reply"); 747 } 748 m = mreq; 749 m->m_pkthdr.len = siz; 750 m->m_pkthdr.rcvif = (struct ifnet *)0; 751 /* 752 * For stream protocols, prepend a Sun RPC 753 * Record Mark. 754 */ 755 if (sotype == SOCK_STREAM) { 756 M_PREPEND(m, NFSX_UNSIGNED, M_WAIT); 757 *mtod(m, u_int32_t *) = 758 htonl(0x80000000 | siz); 759 } 760 if (solockp) 761 (void) nfs_sndlock(solockp, NULL); 762 if (slp->ns_flag & SLP_VALID) { 763 error = 764 nfs_send(so, nd->nd_nam2, m, NULL, p); 765 } else { 766 error = EPIPE; 767 m_freem(m); 768 } 769 if (nfsrtton) 770 nfsd_rt(sotype, nd, cacherep); 771 if (nd->nd_nam2) 772 m_free(nd->nd_nam2); 773 if (nd->nd_mrep) 774 m_freem(nd->nd_mrep); 775 if (error == EPIPE) 776 nfsrv_zapsock(slp); 777 if (solockp) 778 nfs_sndunlock(solockp); 779 if (error == EINTR || error == ERESTART) { 780 pool_put(&nfs_srvdesc_pool, nd); 781 nfsrv_slpderef(slp); 782 s = splsoftnet(); 783 goto done; 784 } 785 break; 786 case RC_DROPIT: 787 if (nfsrtton) 788 nfsd_rt(sotype, nd, cacherep); 789 m_freem(nd->nd_mrep); 790 m_freem(nd->nd_nam2); 791 break; 792 } 793 if (nd) { 794 pool_put(&nfs_srvdesc_pool, nd); 795 nd = NULL; 796 } 797 798 /* 799 * Check to see if there are outstanding writes that 800 * need to be serviced. 801 */ 802 cur_usec = (u_quad_t)time.tv_sec * 1000000 + 803 (u_quad_t)time.tv_usec; 804 s = splsoftclock(); 805 if (LIST_FIRST(&slp->ns_tq) && 806 LIST_FIRST(&slp->ns_tq)->nd_time <= cur_usec) { 807 cacherep = RC_DOIT; 808 writes_todo = 1; 809 } else 810 writes_todo = 0; 811 splx(s); 812 } while (writes_todo); 813 s = splsoftnet(); 814 if (nfsrv_dorec(slp, nfsd, &nd)) { 815 nfsd->nfsd_flag &= ~NFSD_REQINPROG; 816 nfsd->nfsd_slp = NULL; 817 nfsrv_slpderef(slp); 818 } 819 } 820 done: 821 PRELE(l); 822 simple_lock(&nfsd_slock); 823 TAILQ_REMOVE(&nfsd_head, nfsd, nfsd_chain); 824 simple_unlock(&nfsd_slock); 825 splx(s); 826 free((caddr_t)nfsd, M_NFSD); 827 nsd->nsd_nfsd = (struct nfsd *)0; 828 if (--nfs_numnfsd == 0) 829 nfsrv_init(TRUE); /* Reinitialize everything */ 830 return (error); 831 } 832 833 /* 834 * Shut down a socket associated with an nfssvc_sock structure. 835 * Should be called with the send lock set, if required. 836 * The trick here is to increment the sref at the start, so that the nfsds 837 * will stop using it and clear ns_flag at the end so that it will not be 838 * reassigned during cleanup. 839 * 840 * called at splsoftnet. 841 */ 842 void 843 nfsrv_zapsock(slp) 844 struct nfssvc_sock *slp; 845 { 846 struct nfsuid *nuidp, *nnuidp; 847 struct nfsrv_descript *nwp, *nnwp; 848 struct socket *so; 849 struct file *fp; 850 int s; 851 852 simple_lock(&nfsd_slock); 853 if ((slp->ns_flag & SLP_VALID) == 0) { 854 simple_unlock(&nfsd_slock); 855 return; 856 } 857 if (slp->ns_flag & SLP_DOREC) { 858 TAILQ_REMOVE(&nfssvc_sockpending, slp, ns_pending); 859 } 860 slp->ns_flag &= ~SLP_ALLFLAGS; 861 simple_unlock(&nfsd_slock); 862 863 fp = slp->ns_fp; 864 slp->ns_fp = NULL; 865 so = slp->ns_so; 866 slp->ns_so = NULL; 867 KASSERT(fp != NULL); 868 KASSERT(so != NULL); 869 KASSERT(fp->f_data == so); 870 simple_lock(&fp->f_slock); 871 FILE_USE(fp); 872 so->so_upcall = NULL; 873 so->so_upcallarg = NULL; 874 so->so_rcv.sb_flags &= ~SB_UPCALL; 875 soshutdown(so, SHUT_RDWR); 876 closef(fp, (struct proc *)0); 877 878 if (slp->ns_nam) 879 m_free(slp->ns_nam); 880 m_freem(slp->ns_raw); 881 m_freem(slp->ns_rec); 882 for (nuidp = TAILQ_FIRST(&slp->ns_uidlruhead); nuidp != 0; 883 nuidp = nnuidp) { 884 nnuidp = TAILQ_NEXT(nuidp, nu_lru); 885 LIST_REMOVE(nuidp, nu_hash); 886 TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, nu_lru); 887 if (nuidp->nu_flag & NU_NAM) 888 m_freem(nuidp->nu_nam); 889 free((caddr_t)nuidp, M_NFSUID); 890 } 891 s = splsoftclock(); 892 for (nwp = LIST_FIRST(&slp->ns_tq); nwp; nwp = nnwp) { 893 nnwp = LIST_NEXT(nwp, nd_tq); 894 LIST_REMOVE(nwp, nd_tq); 895 pool_put(&nfs_srvdesc_pool, nwp); 896 } 897 LIST_INIT(&slp->ns_tq); 898 splx(s); 899 } 900 901 /* 902 * Derefence a server socket structure. If it has no more references and 903 * is no longer valid, you can throw it away. 904 */ 905 void 906 nfsrv_slpderef(slp) 907 struct nfssvc_sock *slp; 908 { 909 LOCK_ASSERT(!simple_lock_held(&nfsd_slock)); 910 911 if (--(slp->ns_sref) == 0 && (slp->ns_flag & SLP_VALID) == 0) { 912 int s = splsoftnet(); 913 simple_lock(&nfsd_slock); 914 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain); 915 simple_unlock(&nfsd_slock); 916 splx(s); 917 nfsrv_sockfree(slp); 918 } 919 } 920 921 /* 922 * Initialize the data structures for the server. 923 * Handshake with any new nfsds starting up to avoid any chance of 924 * corruption. 925 */ 926 void 927 nfsrv_init(terminating) 928 int terminating; 929 { 930 struct nfssvc_sock *slp; 931 int s; 932 933 s = splsoftnet(); 934 simple_lock(&nfsd_slock); 935 if (nfssvc_sockhead_flag & SLP_INIT) 936 panic("nfsd init"); 937 nfssvc_sockhead_flag |= SLP_INIT; 938 939 if (terminating) { 940 while ((slp = TAILQ_FIRST(&nfssvc_sockhead)) != NULL) { 941 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain); 942 simple_unlock(&nfsd_slock); 943 if (slp->ns_flag & SLP_VALID) 944 nfsrv_zapsock(slp); 945 nfsrv_sockfree(slp); 946 simple_lock(&nfsd_slock); 947 } 948 simple_unlock(&nfsd_slock); 949 splx(s); 950 nfsrv_cleancache(); /* And clear out server cache */ 951 } else { 952 simple_unlock(&nfsd_slock); 953 splx(s); 954 nfs_pub.np_valid = 0; 955 } 956 957 TAILQ_INIT(&nfssvc_sockhead); 958 TAILQ_INIT(&nfssvc_sockpending); 959 nfssvc_sockhead_flag &= ~SLP_INIT; 960 961 TAILQ_INIT(&nfsd_head); 962 SLIST_INIT(&nfsd_idle_head); 963 nfsd_head_flag &= ~NFSD_CHECKSLP; 964 965 nfs_udpsock = nfsrv_sockalloc(); 966 967 #ifdef INET6 968 nfs_udp6sock = nfsrv_sockalloc(); 969 #endif 970 971 #ifdef ISO 972 nfs_cltpsock = nfsrv_sockalloc(); 973 #endif 974 975 simple_lock(&nfsd_slock); 976 if (nfssvc_sockhead_flag & SLP_WANTINIT) { 977 nfssvc_sockhead_flag &= ~SLP_WANTINIT; 978 wakeup(&nfssvc_sockhead); 979 } 980 simple_unlock(&nfsd_slock); 981 splx(s); 982 } 983 984 /* 985 * Add entries to the server monitor log. 986 */ 987 static void 988 nfsd_rt(sotype, nd, cacherep) 989 int sotype; 990 struct nfsrv_descript *nd; 991 int cacherep; 992 { 993 struct drt *rt; 994 995 rt = &nfsdrt.drt[nfsdrt.pos]; 996 if (cacherep == RC_DOIT) 997 rt->flag = 0; 998 else if (cacherep == RC_REPLY) 999 rt->flag = DRT_CACHEREPLY; 1000 else 1001 rt->flag = DRT_CACHEDROP; 1002 if (sotype == SOCK_STREAM) 1003 rt->flag |= DRT_TCP; 1004 if (nd->nd_flag & ND_NQNFS) 1005 rt->flag |= DRT_NQNFS; 1006 else if (nd->nd_flag & ND_NFSV3) 1007 rt->flag |= DRT_NFSV3; 1008 rt->proc = nd->nd_procnum; 1009 if (mtod(nd->nd_nam, struct sockaddr *)->sa_family == AF_INET) 1010 rt->ipadr = mtod(nd->nd_nam, struct sockaddr_in *)->sin_addr.s_addr; 1011 else 1012 rt->ipadr = INADDR_ANY; 1013 rt->resptime = ((time.tv_sec - nd->nd_starttime.tv_sec) * 1000000) + 1014 (time.tv_usec - nd->nd_starttime.tv_usec); 1015 rt->tstamp = time; 1016 nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ; 1017 } 1018 #endif /* NFSSERVER */ 1019 1020 #ifdef NFS 1021 1022 int nfs_defect = 0; 1023 /* 1024 * Asynchronous I/O threads for client nfs. 1025 * They do read-ahead and write-behind operations on the block I/O cache. 1026 * Never returns unless it fails or gets killed. 1027 */ 1028 1029 int 1030 nfssvc_iod(l) 1031 struct lwp *l; 1032 { 1033 struct buf *bp; 1034 int i; 1035 struct nfs_iod *myiod; 1036 struct nfsmount *nmp; 1037 int error = 0; 1038 struct proc *p = l->l_proc; 1039 1040 /* 1041 * Assign my position or return error if too many already running 1042 */ 1043 myiod = NULL; 1044 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) 1045 if (nfs_asyncdaemon[i].nid_proc == NULL) { 1046 myiod = &nfs_asyncdaemon[i]; 1047 break; 1048 } 1049 if (myiod == NULL) 1050 return (EBUSY); 1051 myiod->nid_proc = p; 1052 nfs_numasync++; 1053 PHOLD(l); 1054 /* 1055 * Just loop around doing our stuff until SIGKILL 1056 */ 1057 for (;;) { 1058 while (/*CONSTCOND*/ TRUE) { 1059 simple_lock(&myiod->nid_slock); 1060 nmp = myiod->nid_mount; 1061 if (nmp) { 1062 simple_lock(&nmp->nm_slock); 1063 if (!TAILQ_EMPTY(&nmp->nm_bufq)) { 1064 simple_unlock(&myiod->nid_slock); 1065 break; 1066 } 1067 nmp->nm_bufqiods--; 1068 simple_unlock(&nmp->nm_slock); 1069 } 1070 myiod->nid_want = p; 1071 myiod->nid_mount = NULL; 1072 error = ltsleep(&myiod->nid_want, 1073 PWAIT | PCATCH | PNORELOCK, "nfsidl", 0, 1074 &myiod->nid_slock); 1075 if (error) 1076 goto quit; 1077 } 1078 1079 while ((bp = TAILQ_FIRST(&nmp->nm_bufq)) != NULL) { 1080 /* Take one off the front of the list */ 1081 TAILQ_REMOVE(&nmp->nm_bufq, bp, b_freelist); 1082 nmp->nm_bufqlen--; 1083 if (nmp->nm_bufqwant && 1084 nmp->nm_bufqlen < 2 * nfs_numasync) { 1085 nmp->nm_bufqwant = FALSE; 1086 wakeup(&nmp->nm_bufq); 1087 } 1088 simple_unlock(&nmp->nm_slock); 1089 (void) nfs_doio(bp, NULL); 1090 simple_lock(&nmp->nm_slock); 1091 /* 1092 * If there are more than one iod on this mount, then defect 1093 * so that the iods can be shared out fairly between the mounts 1094 */ 1095 if (nfs_defect && nmp->nm_bufqiods > 1) { 1096 myiod->nid_mount = NULL; 1097 nmp->nm_bufqiods--; 1098 break; 1099 } 1100 } 1101 simple_unlock(&nmp->nm_slock); 1102 } 1103 quit: 1104 PRELE(l); 1105 if (nmp) 1106 nmp->nm_bufqiods--; 1107 myiod->nid_want = NULL; 1108 myiod->nid_mount = NULL; 1109 myiod->nid_proc = NULL; 1110 nfs_numasync--; 1111 1112 return error; 1113 } 1114 1115 void 1116 nfs_iodinit() 1117 { 1118 int i; 1119 1120 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) 1121 simple_lock_init(&nfs_asyncdaemon[i].nid_slock); 1122 } 1123 1124 void 1125 start_nfsio(arg) 1126 void *arg; 1127 { 1128 nfssvc_iod(curlwp); 1129 1130 kthread_exit(0); 1131 } 1132 1133 void 1134 nfs_getset_niothreads(set) 1135 int set; 1136 { 1137 int i, have, start; 1138 1139 for (have = 0, i = 0; i < NFS_MAXASYNCDAEMON; i++) 1140 if (nfs_asyncdaemon[i].nid_proc != NULL) 1141 have++; 1142 1143 if (set) { 1144 /* clamp to sane range */ 1145 nfs_niothreads = max(0, min(nfs_niothreads, NFS_MAXASYNCDAEMON)); 1146 1147 start = nfs_niothreads - have; 1148 1149 while (start > 0) { 1150 kthread_create1(start_nfsio, NULL, NULL, "nfsio"); 1151 start--; 1152 } 1153 1154 for (i = 0; (start < 0) && (i < NFS_MAXASYNCDAEMON); i++) 1155 if (nfs_asyncdaemon[i].nid_proc != NULL) { 1156 psignal(nfs_asyncdaemon[i].nid_proc, SIGKILL); 1157 start++; 1158 } 1159 } else { 1160 if (nfs_niothreads >= 0) 1161 nfs_niothreads = have; 1162 } 1163 } 1164 1165 /* 1166 * Get an authorization string for the uid by having the mount_nfs sitting 1167 * on this mount point porpous out of the kernel and do it. 1168 */ 1169 int 1170 nfs_getauth(nmp, rep, cred, auth_str, auth_len, verf_str, verf_len, key) 1171 struct nfsmount *nmp; 1172 struct nfsreq *rep; 1173 struct ucred *cred; 1174 char **auth_str; 1175 int *auth_len; 1176 char *verf_str; 1177 int *verf_len; 1178 NFSKERBKEY_T key; /* return session key */ 1179 { 1180 int error = 0; 1181 1182 while ((nmp->nm_iflag & NFSMNT_WAITAUTH) == 0) { 1183 nmp->nm_iflag |= NFSMNT_WANTAUTH; 1184 (void) tsleep((caddr_t)&nmp->nm_authtype, PSOCK, 1185 "nfsauth1", 2 * hz); 1186 error = nfs_sigintr(nmp, rep, rep->r_procp); 1187 if (error) { 1188 nmp->nm_iflag &= ~NFSMNT_WANTAUTH; 1189 return (error); 1190 } 1191 } 1192 nmp->nm_iflag &= ~(NFSMNT_WAITAUTH | NFSMNT_WANTAUTH); 1193 nmp->nm_authstr = *auth_str = (char *)malloc(RPCAUTH_MAXSIZ, M_TEMP, M_WAITOK); 1194 nmp->nm_authlen = RPCAUTH_MAXSIZ; 1195 nmp->nm_verfstr = verf_str; 1196 nmp->nm_verflen = *verf_len; 1197 nmp->nm_authuid = cred->cr_uid; 1198 wakeup((caddr_t)&nmp->nm_authstr); 1199 1200 /* 1201 * And wait for mount_nfs to do its stuff. 1202 */ 1203 while ((nmp->nm_iflag & NFSMNT_HASAUTH) == 0 && error == 0) { 1204 (void) tsleep((caddr_t)&nmp->nm_authlen, PSOCK, 1205 "nfsauth2", 2 * hz); 1206 error = nfs_sigintr(nmp, rep, rep->r_procp); 1207 } 1208 if (nmp->nm_iflag & NFSMNT_AUTHERR) { 1209 nmp->nm_iflag &= ~NFSMNT_AUTHERR; 1210 error = EAUTH; 1211 } 1212 if (error) 1213 free((caddr_t)*auth_str, M_TEMP); 1214 else { 1215 *auth_len = nmp->nm_authlen; 1216 *verf_len = nmp->nm_verflen; 1217 memcpy(key, nmp->nm_key, sizeof (NFSKERBKEY_T)); 1218 } 1219 nmp->nm_iflag &= ~NFSMNT_HASAUTH; 1220 nmp->nm_iflag |= NFSMNT_WAITAUTH; 1221 if (nmp->nm_iflag & NFSMNT_WANTAUTH) { 1222 nmp->nm_iflag &= ~NFSMNT_WANTAUTH; 1223 wakeup((caddr_t)&nmp->nm_authtype); 1224 } 1225 return (error); 1226 } 1227 1228 /* 1229 * Get a nickname authenticator and verifier. 1230 */ 1231 int 1232 nfs_getnickauth(nmp, cred, auth_str, auth_len, verf_str, verf_len) 1233 struct nfsmount *nmp; 1234 struct ucred *cred; 1235 char **auth_str; 1236 int *auth_len; 1237 char *verf_str; 1238 int verf_len; 1239 { 1240 struct nfsuid *nuidp; 1241 u_int32_t *nickp, *verfp; 1242 struct timeval ktvin, ktvout; 1243 1244 #ifdef DIAGNOSTIC 1245 if (verf_len < (4 * NFSX_UNSIGNED)) 1246 panic("nfs_getnickauth verf too small"); 1247 #endif 1248 LIST_FOREACH(nuidp, NMUIDHASH(nmp, cred->cr_uid), nu_hash) { 1249 if (nuidp->nu_cr.cr_uid == cred->cr_uid) 1250 break; 1251 } 1252 if (!nuidp || nuidp->nu_expire < time.tv_sec) 1253 return (EACCES); 1254 1255 /* 1256 * Move to the end of the lru list (end of lru == most recently used). 1257 */ 1258 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru); 1259 TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, nu_lru); 1260 1261 nickp = (u_int32_t *)malloc(2 * NFSX_UNSIGNED, M_TEMP, M_WAITOK); 1262 *nickp++ = txdr_unsigned(RPCAKN_NICKNAME); 1263 *nickp = txdr_unsigned(nuidp->nu_nickname); 1264 *auth_str = (char *)nickp; 1265 *auth_len = 2 * NFSX_UNSIGNED; 1266 1267 /* 1268 * Now we must encrypt the verifier and package it up. 1269 */ 1270 verfp = (u_int32_t *)verf_str; 1271 *verfp++ = txdr_unsigned(RPCAKN_NICKNAME); 1272 if (time.tv_sec > nuidp->nu_timestamp.tv_sec || 1273 (time.tv_sec == nuidp->nu_timestamp.tv_sec && 1274 time.tv_usec > nuidp->nu_timestamp.tv_usec)) 1275 nuidp->nu_timestamp = time; 1276 else 1277 nuidp->nu_timestamp.tv_usec++; 1278 ktvin.tv_sec = txdr_unsigned(nuidp->nu_timestamp.tv_sec); 1279 ktvin.tv_usec = txdr_unsigned(nuidp->nu_timestamp.tv_usec); 1280 1281 /* 1282 * Now encrypt the timestamp verifier in ecb mode using the session 1283 * key. 1284 */ 1285 #ifdef NFSKERB 1286 XXX 1287 #endif 1288 1289 *verfp++ = ktvout.tv_sec; 1290 *verfp++ = ktvout.tv_usec; 1291 *verfp = 0; 1292 return (0); 1293 } 1294 1295 /* 1296 * Save the current nickname in a hash list entry on the mount point. 1297 */ 1298 int 1299 nfs_savenickauth(nmp, cred, len, key, mdp, dposp, mrep) 1300 struct nfsmount *nmp; 1301 struct ucred *cred; 1302 int len; 1303 NFSKERBKEY_T key; 1304 struct mbuf **mdp; 1305 char **dposp; 1306 struct mbuf *mrep; 1307 { 1308 struct nfsuid *nuidp; 1309 u_int32_t *tl; 1310 int32_t t1; 1311 struct mbuf *md = *mdp; 1312 struct timeval ktvin, ktvout; 1313 u_int32_t nick; 1314 char *dpos = *dposp, *cp2; 1315 int deltasec, error = 0; 1316 1317 if (len == (3 * NFSX_UNSIGNED)) { 1318 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 1319 ktvin.tv_sec = *tl++; 1320 ktvin.tv_usec = *tl++; 1321 nick = fxdr_unsigned(u_int32_t, *tl); 1322 1323 /* 1324 * Decrypt the timestamp in ecb mode. 1325 */ 1326 #ifdef NFSKERB 1327 XXX 1328 #endif 1329 ktvout.tv_sec = fxdr_unsigned(long, ktvout.tv_sec); 1330 ktvout.tv_usec = fxdr_unsigned(long, ktvout.tv_usec); 1331 deltasec = time.tv_sec - ktvout.tv_sec; 1332 if (deltasec < 0) 1333 deltasec = -deltasec; 1334 /* 1335 * If ok, add it to the hash list for the mount point. 1336 */ 1337 if (deltasec <= NFS_KERBCLOCKSKEW) { 1338 if (nmp->nm_numuids < nuidhash_max) { 1339 nmp->nm_numuids++; 1340 nuidp = (struct nfsuid *) 1341 malloc(sizeof (struct nfsuid), M_NFSUID, 1342 M_WAITOK); 1343 } else { 1344 nuidp = TAILQ_FIRST(&nmp->nm_uidlruhead); 1345 LIST_REMOVE(nuidp, nu_hash); 1346 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, 1347 nu_lru); 1348 } 1349 nuidp->nu_flag = 0; 1350 nuidp->nu_cr.cr_uid = cred->cr_uid; 1351 nuidp->nu_expire = time.tv_sec + NFS_KERBTTL; 1352 nuidp->nu_timestamp = ktvout; 1353 nuidp->nu_nickname = nick; 1354 memcpy(nuidp->nu_key, key, sizeof (NFSKERBKEY_T)); 1355 TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, 1356 nu_lru); 1357 LIST_INSERT_HEAD(NMUIDHASH(nmp, cred->cr_uid), 1358 nuidp, nu_hash); 1359 } 1360 } else 1361 nfsm_adv(nfsm_rndup(len)); 1362 nfsmout: 1363 *mdp = md; 1364 *dposp = dpos; 1365 return (error); 1366 } 1367 #endif /* NFS */
Cache object: 65c40378a792204a4e48ca01d4ebc59d
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