1 /* $NetBSD: nfs_socket.c,v 1.88 2003/05/22 14:16:23 yamt Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1991, 1993, 1995 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. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)nfs_socket.c 8.5 (Berkeley) 3/30/95 39 */ 40 41 /* 42 * Socket operations for use by nfs 43 */ 44 45 #include <sys/cdefs.h> 46 __KERNEL_RCSID(0, "$NetBSD: nfs_socket.c,v 1.88 2003/05/22 14:16:23 yamt Exp $"); 47 48 #include "fs_nfs.h" 49 #include "opt_nfs.h" 50 #include "opt_nfsserver.h" 51 #include "opt_inet.h" 52 53 #include <sys/param.h> 54 #include <sys/systm.h> 55 #include <sys/callout.h> 56 #include <sys/proc.h> 57 #include <sys/mount.h> 58 #include <sys/kernel.h> 59 #include <sys/mbuf.h> 60 #include <sys/vnode.h> 61 #include <sys/domain.h> 62 #include <sys/protosw.h> 63 #include <sys/socket.h> 64 #include <sys/socketvar.h> 65 #include <sys/syslog.h> 66 #include <sys/tprintf.h> 67 #include <sys/namei.h> 68 #include <sys/signal.h> 69 #include <sys/signalvar.h> 70 71 #include <netinet/in.h> 72 #include <netinet/tcp.h> 73 74 #include <nfs/rpcv2.h> 75 #include <nfs/nfsproto.h> 76 #include <nfs/nfs.h> 77 #include <nfs/xdr_subs.h> 78 #include <nfs/nfsm_subs.h> 79 #include <nfs/nfsmount.h> 80 #include <nfs/nfsnode.h> 81 #include <nfs/nfsrtt.h> 82 #include <nfs/nqnfs.h> 83 #include <nfs/nfs_var.h> 84 85 MALLOC_DEFINE(M_NFSREQ, "NFS req", "NFS request header"); 86 #ifdef MBUFTRACE 87 struct mowner nfs_mowner = { "nfs" }; 88 #endif 89 90 /* 91 * Estimate rto for an nfs rpc sent via. an unreliable datagram. 92 * Use the mean and mean deviation of rtt for the appropriate type of rpc 93 * for the frequent rpcs and a default for the others. 94 * The justification for doing "other" this way is that these rpcs 95 * happen so infrequently that timer est. would probably be stale. 96 * Also, since many of these rpcs are 97 * non-idempotent, a conservative timeout is desired. 98 * getattr, lookup - A+2D 99 * read, write - A+4D 100 * other - nm_timeo 101 */ 102 #define NFS_RTO(n, t) \ 103 ((t) == 0 ? (n)->nm_timeo : \ 104 ((t) < 3 ? \ 105 (((((n)->nm_srtt[t-1] + 3) >> 2) + (n)->nm_sdrtt[t-1] + 1) >> 1) : \ 106 ((((n)->nm_srtt[t-1] + 7) >> 3) + (n)->nm_sdrtt[t-1] + 1))) 107 #define NFS_SRTT(r) (r)->r_nmp->nm_srtt[proct[(r)->r_procnum] - 1] 108 #define NFS_SDRTT(r) (r)->r_nmp->nm_sdrtt[proct[(r)->r_procnum] - 1] 109 /* 110 * External data, mostly RPC constants in XDR form 111 */ 112 extern u_int32_t rpc_reply, rpc_msgdenied, rpc_mismatch, rpc_vers, 113 rpc_auth_unix, rpc_msgaccepted, rpc_call, rpc_autherr, 114 rpc_auth_kerb; 115 extern u_int32_t nfs_prog, nqnfs_prog; 116 extern time_t nqnfsstarttime; 117 extern const int nfsv3_procid[NFS_NPROCS]; 118 extern int nfs_ticks; 119 120 /* 121 * Defines which timer to use for the procnum. 122 * 0 - default 123 * 1 - getattr 124 * 2 - lookup 125 * 3 - read 126 * 4 - write 127 */ 128 static const int proct[NFS_NPROCS] = { 129 0, 1, 0, 2, 1, 3, 3, 4, 0, 0, 0, 0, 0, 0, 0, 0, 3, 3, 0, 0, 0, 0, 0, 130 0, 0, 0, 131 }; 132 133 /* 134 * There is a congestion window for outstanding rpcs maintained per mount 135 * point. The cwnd size is adjusted in roughly the way that: 136 * Van Jacobson, Congestion avoidance and Control, In "Proceedings of 137 * SIGCOMM '88". ACM, August 1988. 138 * describes for TCP. The cwnd size is chopped in half on a retransmit timeout 139 * and incremented by 1/cwnd when each rpc reply is received and a full cwnd 140 * of rpcs is in progress. 141 * (The sent count and cwnd are scaled for integer arith.) 142 * Variants of "slow start" were tried and were found to be too much of a 143 * performance hit (ave. rtt 3 times larger), 144 * I suspect due to the large rtt that nfs rpcs have. 145 */ 146 #define NFS_CWNDSCALE 256 147 #define NFS_MAXCWND (NFS_CWNDSCALE * 32) 148 static const int nfs_backoff[8] = { 2, 4, 8, 16, 32, 64, 128, 256, }; 149 int nfsrtton = 0; 150 struct nfsrtt nfsrtt; 151 struct nfsreqhead nfs_reqq; 152 153 struct callout nfs_timer_ch = CALLOUT_INITIALIZER; 154 155 /* 156 * Initialize sockets and congestion for a new NFS connection. 157 * We do not free the sockaddr if error. 158 */ 159 int 160 nfs_connect(nmp, rep) 161 struct nfsmount *nmp; 162 struct nfsreq *rep; 163 { 164 struct socket *so; 165 int s, error, rcvreserve, sndreserve; 166 struct sockaddr *saddr; 167 struct sockaddr_in *sin; 168 #ifdef INET6 169 struct sockaddr_in6 *sin6; 170 #endif 171 struct mbuf *m; 172 173 nmp->nm_so = (struct socket *)0; 174 saddr = mtod(nmp->nm_nam, struct sockaddr *); 175 error = socreate(saddr->sa_family, &nmp->nm_so, nmp->nm_sotype, 176 nmp->nm_soproto); 177 if (error) 178 goto bad; 179 so = nmp->nm_so; 180 #ifdef MBUFTRACE 181 so->so_mowner = &nfs_mowner; 182 so->so_rcv.sb_mowner = &nfs_mowner; 183 so->so_snd.sb_mowner = &nfs_mowner; 184 #endif 185 nmp->nm_soflags = so->so_proto->pr_flags; 186 187 /* 188 * Some servers require that the client port be a reserved port number. 189 */ 190 if (saddr->sa_family == AF_INET && (nmp->nm_flag & NFSMNT_RESVPORT)) { 191 m = m_get(M_WAIT, MT_SOOPTS); 192 MCLAIM(m, so->so_mowner); 193 *mtod(m, int32_t *) = IP_PORTRANGE_LOW; 194 m->m_len = sizeof(int32_t); 195 if ((error = sosetopt(so, IPPROTO_IP, IP_PORTRANGE, m))) 196 goto bad; 197 m = m_get(M_WAIT, MT_SONAME); 198 MCLAIM(m, so->so_mowner); 199 sin = mtod(m, struct sockaddr_in *); 200 sin->sin_len = m->m_len = sizeof (struct sockaddr_in); 201 sin->sin_family = AF_INET; 202 sin->sin_addr.s_addr = INADDR_ANY; 203 sin->sin_port = 0; 204 error = sobind(so, m, &proc0); 205 m_freem(m); 206 if (error) 207 goto bad; 208 } 209 #ifdef INET6 210 if (saddr->sa_family == AF_INET6 && (nmp->nm_flag & NFSMNT_RESVPORT)) { 211 m = m_get(M_WAIT, MT_SOOPTS); 212 MCLAIM(m, so->so_mowner); 213 *mtod(m, int32_t *) = IPV6_PORTRANGE_LOW; 214 m->m_len = sizeof(int32_t); 215 if ((error = sosetopt(so, IPPROTO_IPV6, IPV6_PORTRANGE, m))) 216 goto bad; 217 m = m_get(M_WAIT, MT_SONAME); 218 MCLAIM(m, so->so_mowner); 219 sin6 = mtod(m, struct sockaddr_in6 *); 220 sin6->sin6_len = m->m_len = sizeof (struct sockaddr_in6); 221 sin6->sin6_family = AF_INET6; 222 sin6->sin6_addr = in6addr_any; 223 sin6->sin6_port = 0; 224 error = sobind(so, m, &proc0); 225 m_freem(m); 226 if (error) 227 goto bad; 228 } 229 #endif 230 231 /* 232 * Protocols that do not require connections may be optionally left 233 * unconnected for servers that reply from a port other than NFS_PORT. 234 */ 235 if (nmp->nm_flag & NFSMNT_NOCONN) { 236 if (nmp->nm_soflags & PR_CONNREQUIRED) { 237 error = ENOTCONN; 238 goto bad; 239 } 240 } else { 241 error = soconnect(so, nmp->nm_nam); 242 if (error) 243 goto bad; 244 245 /* 246 * Wait for the connection to complete. Cribbed from the 247 * connect system call but with the wait timing out so 248 * that interruptible mounts don't hang here for a long time. 249 */ 250 s = splsoftnet(); 251 while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) { 252 (void) tsleep((caddr_t)&so->so_timeo, PSOCK, 253 "nfscn1", 2 * hz); 254 if ((so->so_state & SS_ISCONNECTING) && 255 so->so_error == 0 && rep && 256 (error = nfs_sigintr(nmp, rep, rep->r_procp)) != 0){ 257 so->so_state &= ~SS_ISCONNECTING; 258 splx(s); 259 goto bad; 260 } 261 } 262 if (so->so_error) { 263 error = so->so_error; 264 so->so_error = 0; 265 splx(s); 266 goto bad; 267 } 268 splx(s); 269 } 270 if (nmp->nm_flag & (NFSMNT_SOFT | NFSMNT_INT)) { 271 so->so_rcv.sb_timeo = (5 * hz); 272 so->so_snd.sb_timeo = (5 * hz); 273 } else { 274 so->so_rcv.sb_timeo = 0; 275 so->so_snd.sb_timeo = 0; 276 } 277 if (nmp->nm_sotype == SOCK_DGRAM) { 278 sndreserve = (nmp->nm_wsize + NFS_MAXPKTHDR) * 2; 279 rcvreserve = (max(nmp->nm_rsize, nmp->nm_readdirsize) + 280 NFS_MAXPKTHDR) * 2; 281 } else if (nmp->nm_sotype == SOCK_SEQPACKET) { 282 sndreserve = (nmp->nm_wsize + NFS_MAXPKTHDR) * 2; 283 rcvreserve = (max(nmp->nm_rsize, nmp->nm_readdirsize) + 284 NFS_MAXPKTHDR) * 2; 285 } else { 286 if (nmp->nm_sotype != SOCK_STREAM) 287 panic("nfscon sotype"); 288 if (so->so_proto->pr_flags & PR_CONNREQUIRED) { 289 m = m_get(M_WAIT, MT_SOOPTS); 290 MCLAIM(m, so->so_mowner); 291 *mtod(m, int32_t *) = 1; 292 m->m_len = sizeof(int32_t); 293 sosetopt(so, SOL_SOCKET, SO_KEEPALIVE, m); 294 } 295 if (so->so_proto->pr_protocol == IPPROTO_TCP) { 296 m = m_get(M_WAIT, MT_SOOPTS); 297 MCLAIM(m, so->so_mowner); 298 *mtod(m, int32_t *) = 1; 299 m->m_len = sizeof(int32_t); 300 sosetopt(so, IPPROTO_TCP, TCP_NODELAY, m); 301 } 302 sndreserve = (nmp->nm_wsize + NFS_MAXPKTHDR + 303 sizeof (u_int32_t)) * 2; 304 rcvreserve = (nmp->nm_rsize + NFS_MAXPKTHDR + 305 sizeof (u_int32_t)) * 2; 306 } 307 error = soreserve(so, sndreserve, rcvreserve); 308 if (error) 309 goto bad; 310 so->so_rcv.sb_flags |= SB_NOINTR; 311 so->so_snd.sb_flags |= SB_NOINTR; 312 313 /* Initialize other non-zero congestion variables */ 314 nmp->nm_srtt[0] = nmp->nm_srtt[1] = nmp->nm_srtt[2] = nmp->nm_srtt[3] = 315 NFS_TIMEO << 3; 316 nmp->nm_sdrtt[0] = nmp->nm_sdrtt[1] = nmp->nm_sdrtt[2] = 317 nmp->nm_sdrtt[3] = 0; 318 nmp->nm_cwnd = NFS_MAXCWND / 2; /* Initial send window */ 319 nmp->nm_sent = 0; 320 nmp->nm_timeouts = 0; 321 return (0); 322 323 bad: 324 nfs_disconnect(nmp); 325 return (error); 326 } 327 328 /* 329 * Reconnect routine: 330 * Called when a connection is broken on a reliable protocol. 331 * - clean up the old socket 332 * - nfs_connect() again 333 * - set R_MUSTRESEND for all outstanding requests on mount point 334 * If this fails the mount point is DEAD! 335 * nb: Must be called with the nfs_sndlock() set on the mount point. 336 */ 337 int 338 nfs_reconnect(rep) 339 struct nfsreq *rep; 340 { 341 struct nfsreq *rp; 342 struct nfsmount *nmp = rep->r_nmp; 343 int error; 344 345 nfs_disconnect(nmp); 346 while ((error = nfs_connect(nmp, rep)) != 0) { 347 if (error == EINTR || error == ERESTART) 348 return (EINTR); 349 (void) tsleep((caddr_t)&lbolt, PSOCK, "nfscn2", 0); 350 } 351 352 /* 353 * Loop through outstanding request list and fix up all requests 354 * on old socket. 355 */ 356 TAILQ_FOREACH(rp, &nfs_reqq, r_chain) { 357 if (rp->r_nmp == nmp) 358 rp->r_flags |= R_MUSTRESEND; 359 } 360 return (0); 361 } 362 363 /* 364 * NFS disconnect. Clean up and unlink. 365 */ 366 void 367 nfs_disconnect(nmp) 368 struct nfsmount *nmp; 369 { 370 struct socket *so; 371 int drain = 0; 372 373 if (nmp->nm_so) { 374 so = nmp->nm_so; 375 nmp->nm_so = (struct socket *)0; 376 soshutdown(so, 2); 377 drain = (nmp->nm_iflag & NFSMNT_DISMNT) != 0; 378 if (drain) { 379 /* 380 * soshutdown() above should wake up the current 381 * listener. 382 * Now wake up those waiting for the receive lock, and 383 * wait for them to go away unhappy, to prevent *nmp 384 * from evaporating while they're sleeping. 385 */ 386 while (nmp->nm_waiters > 0) { 387 wakeup (&nmp->nm_iflag); 388 (void) tsleep(&nmp->nm_waiters, PVFS, 389 "nfsdis", 0); 390 } 391 } 392 soclose(so); 393 } 394 #ifdef DIAGNOSTIC 395 if (drain && (nmp->nm_waiters > 0)) 396 panic("nfs_disconnect: waiters left after drain?"); 397 #endif 398 } 399 400 void 401 nfs_safedisconnect(nmp) 402 struct nfsmount *nmp; 403 { 404 struct nfsreq dummyreq; 405 406 memset(&dummyreq, 0, sizeof(dummyreq)); 407 dummyreq.r_nmp = nmp; 408 nfs_rcvlock(&dummyreq); /* XXX ignored error return */ 409 nfs_disconnect(nmp); 410 nfs_rcvunlock(nmp); 411 } 412 413 /* 414 * This is the nfs send routine. For connection based socket types, it 415 * must be called with an nfs_sndlock() on the socket. 416 * "rep == NULL" indicates that it has been called from a server. 417 * For the client side: 418 * - return EINTR if the RPC is terminated, 0 otherwise 419 * - set R_MUSTRESEND if the send fails for any reason 420 * - do any cleanup required by recoverable socket errors (? ? ?) 421 * For the server side: 422 * - return EINTR or ERESTART if interrupted by a signal 423 * - return EPIPE if a connection is lost for connection based sockets (TCP...) 424 * - do any cleanup required by recoverable socket errors (? ? ?) 425 */ 426 int 427 nfs_send(so, nam, top, rep) 428 struct socket *so; 429 struct mbuf *nam; 430 struct mbuf *top; 431 struct nfsreq *rep; 432 { 433 struct mbuf *sendnam; 434 int error, soflags, flags; 435 436 if (rep) { 437 if (rep->r_flags & R_SOFTTERM) { 438 m_freem(top); 439 return (EINTR); 440 } 441 if ((so = rep->r_nmp->nm_so) == NULL) { 442 rep->r_flags |= R_MUSTRESEND; 443 m_freem(top); 444 return (0); 445 } 446 rep->r_flags &= ~R_MUSTRESEND; 447 soflags = rep->r_nmp->nm_soflags; 448 } else 449 soflags = so->so_proto->pr_flags; 450 if ((soflags & PR_CONNREQUIRED) || (so->so_state & SS_ISCONNECTED)) 451 sendnam = (struct mbuf *)0; 452 else 453 sendnam = nam; 454 if (so->so_type == SOCK_SEQPACKET) 455 flags = MSG_EOR; 456 else 457 flags = 0; 458 459 error = (*so->so_send)(so, sendnam, (struct uio *)0, top, 460 (struct mbuf *)0, flags); 461 if (error) { 462 if (rep) { 463 if (error == ENOBUFS && so->so_type == SOCK_DGRAM) { 464 /* 465 * We're too fast for the network/driver, 466 * and UDP isn't flowcontrolled. 467 * We need to resend. This is not fatal, 468 * just try again. 469 * 470 * Could be smarter here by doing some sort 471 * of a backoff, but this is rare. 472 */ 473 rep->r_flags |= R_MUSTRESEND; 474 } else { 475 log(LOG_INFO, "nfs send error %d for %s\n", 476 error, 477 rep->r_nmp->nm_mountp->mnt_stat.f_mntfromname); 478 /* 479 * Deal with errors for the client side. 480 */ 481 if (rep->r_flags & R_SOFTTERM) 482 error = EINTR; 483 else 484 rep->r_flags |= R_MUSTRESEND; 485 } 486 } else { 487 /* 488 * See above. This error can happen under normal 489 * circumstances and the log is too noisy. 490 * The error will still show up in nfsstat. 491 */ 492 if (error != ENOBUFS || so->so_type != SOCK_DGRAM) 493 log(LOG_INFO, "nfsd send error %d\n", error); 494 } 495 496 /* 497 * Handle any recoverable (soft) socket errors here. (? ? ?) 498 */ 499 if (error != EINTR && error != ERESTART && 500 error != EWOULDBLOCK && error != EPIPE) 501 error = 0; 502 } 503 return (error); 504 } 505 506 #ifdef NFS 507 /* 508 * Receive a Sun RPC Request/Reply. For SOCK_DGRAM, the work is all 509 * done by soreceive(), but for SOCK_STREAM we must deal with the Record 510 * Mark and consolidate the data into a new mbuf list. 511 * nb: Sometimes TCP passes the data up to soreceive() in long lists of 512 * small mbufs. 513 * For SOCK_STREAM we must be very careful to read an entire record once 514 * we have read any of it, even if the system call has been interrupted. 515 */ 516 int 517 nfs_receive(rep, aname, mp) 518 struct nfsreq *rep; 519 struct mbuf **aname; 520 struct mbuf **mp; 521 { 522 struct socket *so; 523 struct uio auio; 524 struct iovec aio; 525 struct mbuf *m; 526 struct mbuf *control; 527 u_int32_t len; 528 struct mbuf **getnam; 529 int error, sotype, rcvflg; 530 struct proc *p = curproc; /* XXX */ 531 532 /* 533 * Set up arguments for soreceive() 534 */ 535 *mp = (struct mbuf *)0; 536 *aname = (struct mbuf *)0; 537 sotype = rep->r_nmp->nm_sotype; 538 539 /* 540 * For reliable protocols, lock against other senders/receivers 541 * in case a reconnect is necessary. 542 * For SOCK_STREAM, first get the Record Mark to find out how much 543 * more there is to get. 544 * We must lock the socket against other receivers 545 * until we have an entire rpc request/reply. 546 */ 547 if (sotype != SOCK_DGRAM) { 548 error = nfs_sndlock(&rep->r_nmp->nm_iflag, rep); 549 if (error) 550 return (error); 551 tryagain: 552 /* 553 * Check for fatal errors and resending request. 554 */ 555 /* 556 * Ugh: If a reconnect attempt just happened, nm_so 557 * would have changed. NULL indicates a failed 558 * attempt that has essentially shut down this 559 * mount point. 560 */ 561 if (rep->r_mrep || (rep->r_flags & R_SOFTTERM)) { 562 nfs_sndunlock(&rep->r_nmp->nm_iflag); 563 return (EINTR); 564 } 565 so = rep->r_nmp->nm_so; 566 if (!so) { 567 error = nfs_reconnect(rep); 568 if (error) { 569 nfs_sndunlock(&rep->r_nmp->nm_iflag); 570 return (error); 571 } 572 goto tryagain; 573 } 574 while (rep->r_flags & R_MUSTRESEND) { 575 m = m_copym(rep->r_mreq, 0, M_COPYALL, M_WAIT); 576 nfsstats.rpcretries++; 577 error = nfs_send(so, rep->r_nmp->nm_nam, m, rep); 578 if (error) { 579 if (error == EINTR || error == ERESTART || 580 (error = nfs_reconnect(rep)) != 0) { 581 nfs_sndunlock(&rep->r_nmp->nm_iflag); 582 return (error); 583 } 584 goto tryagain; 585 } 586 } 587 nfs_sndunlock(&rep->r_nmp->nm_iflag); 588 if (sotype == SOCK_STREAM) { 589 aio.iov_base = (caddr_t) &len; 590 aio.iov_len = sizeof(u_int32_t); 591 auio.uio_iov = &aio; 592 auio.uio_iovcnt = 1; 593 auio.uio_segflg = UIO_SYSSPACE; 594 auio.uio_rw = UIO_READ; 595 auio.uio_offset = 0; 596 auio.uio_resid = sizeof(u_int32_t); 597 auio.uio_procp = p; 598 do { 599 rcvflg = MSG_WAITALL; 600 error = (*so->so_receive)(so, (struct mbuf **)0, &auio, 601 (struct mbuf **)0, (struct mbuf **)0, &rcvflg); 602 if (error == EWOULDBLOCK && rep) { 603 if (rep->r_flags & R_SOFTTERM) 604 return (EINTR); 605 } 606 } while (error == EWOULDBLOCK); 607 if (!error && auio.uio_resid > 0) { 608 /* 609 * Don't log a 0 byte receive; it means 610 * that the socket has been closed, and 611 * can happen during normal operation 612 * (forcible unmount or Solaris server). 613 */ 614 if (auio.uio_resid != sizeof (u_int32_t)) 615 log(LOG_INFO, 616 "short receive (%lu/%lu) from nfs server %s\n", 617 (u_long)sizeof(u_int32_t) - auio.uio_resid, 618 (u_long)sizeof(u_int32_t), 619 rep->r_nmp->nm_mountp->mnt_stat.f_mntfromname); 620 error = EPIPE; 621 } 622 if (error) 623 goto errout; 624 len = ntohl(len) & ~0x80000000; 625 /* 626 * This is SERIOUS! We are out of sync with the sender 627 * and forcing a disconnect/reconnect is all I can do. 628 */ 629 if (len > NFS_MAXPACKET) { 630 log(LOG_ERR, "%s (%d) from nfs server %s\n", 631 "impossible packet length", 632 len, 633 rep->r_nmp->nm_mountp->mnt_stat.f_mntfromname); 634 error = EFBIG; 635 goto errout; 636 } 637 auio.uio_resid = len; 638 do { 639 rcvflg = MSG_WAITALL; 640 error = (*so->so_receive)(so, (struct mbuf **)0, 641 &auio, mp, (struct mbuf **)0, &rcvflg); 642 } while (error == EWOULDBLOCK || error == EINTR || 643 error == ERESTART); 644 if (!error && auio.uio_resid > 0) { 645 if (len != auio.uio_resid) 646 log(LOG_INFO, 647 "short receive (%lu/%d) from nfs server %s\n", 648 (u_long)len - auio.uio_resid, len, 649 rep->r_nmp->nm_mountp->mnt_stat.f_mntfromname); 650 error = EPIPE; 651 } 652 } else { 653 /* 654 * NB: Since uio_resid is big, MSG_WAITALL is ignored 655 * and soreceive() will return when it has either a 656 * control msg or a data msg. 657 * We have no use for control msg., but must grab them 658 * and then throw them away so we know what is going 659 * on. 660 */ 661 auio.uio_resid = len = 100000000; /* Anything Big */ 662 auio.uio_procp = p; 663 do { 664 rcvflg = 0; 665 error = (*so->so_receive)(so, (struct mbuf **)0, 666 &auio, mp, &control, &rcvflg); 667 if (control) 668 m_freem(control); 669 if (error == EWOULDBLOCK && rep) { 670 if (rep->r_flags & R_SOFTTERM) 671 return (EINTR); 672 } 673 } while (error == EWOULDBLOCK || 674 (!error && *mp == NULL && control)); 675 if ((rcvflg & MSG_EOR) == 0) 676 printf("Egad!!\n"); 677 if (!error && *mp == NULL) 678 error = EPIPE; 679 len -= auio.uio_resid; 680 } 681 errout: 682 if (error && error != EINTR && error != ERESTART) { 683 m_freem(*mp); 684 *mp = (struct mbuf *)0; 685 if (error != EPIPE) 686 log(LOG_INFO, 687 "receive error %d from nfs server %s\n", 688 error, 689 rep->r_nmp->nm_mountp->mnt_stat.f_mntfromname); 690 error = nfs_sndlock(&rep->r_nmp->nm_iflag, rep); 691 if (!error) 692 error = nfs_reconnect(rep); 693 if (!error) 694 goto tryagain; 695 else 696 nfs_sndunlock(&rep->r_nmp->nm_iflag); 697 } 698 } else { 699 if ((so = rep->r_nmp->nm_so) == NULL) 700 return (EACCES); 701 if (so->so_state & SS_ISCONNECTED) 702 getnam = (struct mbuf **)0; 703 else 704 getnam = aname; 705 auio.uio_resid = len = 1000000; 706 auio.uio_procp = p; 707 do { 708 rcvflg = 0; 709 error = (*so->so_receive)(so, getnam, &auio, mp, 710 (struct mbuf **)0, &rcvflg); 711 if (error == EWOULDBLOCK && 712 (rep->r_flags & R_SOFTTERM)) 713 return (EINTR); 714 } while (error == EWOULDBLOCK); 715 len -= auio.uio_resid; 716 if (!error && *mp == NULL) 717 error = EPIPE; 718 } 719 if (error) { 720 m_freem(*mp); 721 *mp = (struct mbuf *)0; 722 } 723 return (error); 724 } 725 726 /* 727 * Implement receipt of reply on a socket. 728 * We must search through the list of received datagrams matching them 729 * with outstanding requests using the xid, until ours is found. 730 */ 731 /* ARGSUSED */ 732 int 733 nfs_reply(myrep) 734 struct nfsreq *myrep; 735 { 736 struct nfsreq *rep; 737 struct nfsmount *nmp = myrep->r_nmp; 738 int32_t t1; 739 struct mbuf *mrep, *nam, *md; 740 u_int32_t rxid, *tl; 741 caddr_t dpos, cp2; 742 int error; 743 744 /* 745 * Loop around until we get our own reply 746 */ 747 for (;;) { 748 /* 749 * Lock against other receivers so that I don't get stuck in 750 * sbwait() after someone else has received my reply for me. 751 * Also necessary for connection based protocols to avoid 752 * race conditions during a reconnect. 753 */ 754 error = nfs_rcvlock(myrep); 755 if (error == EALREADY) 756 return (0); 757 if (error) 758 return (error); 759 /* 760 * Get the next Rpc reply off the socket 761 */ 762 nmp->nm_waiters++; 763 error = nfs_receive(myrep, &nam, &mrep); 764 nfs_rcvunlock(nmp); 765 if (error) { 766 767 if (nmp->nm_iflag & NFSMNT_DISMNT) { 768 /* 769 * Oops, we're going away now.. 770 */ 771 nmp->nm_waiters--; 772 wakeup (&nmp->nm_waiters); 773 return error; 774 } 775 nmp->nm_waiters--; 776 /* 777 * Ignore routing errors on connectionless protocols? ? 778 */ 779 if (NFSIGNORE_SOERROR(nmp->nm_soflags, error)) { 780 nmp->nm_so->so_error = 0; 781 #ifdef DEBUG 782 printf("nfs_reply: ignoring error %d\n", error); 783 #endif 784 if (myrep->r_flags & R_GETONEREP) 785 return (0); 786 continue; 787 } 788 return (error); 789 } 790 nmp->nm_waiters--; 791 if (nam) 792 m_freem(nam); 793 794 /* 795 * Get the xid and check that it is an rpc reply 796 */ 797 md = mrep; 798 dpos = mtod(md, caddr_t); 799 nfsm_dissect(tl, u_int32_t *, 2*NFSX_UNSIGNED); 800 rxid = *tl++; 801 if (*tl != rpc_reply) { 802 #ifndef NFS_V2_ONLY 803 if (nmp->nm_flag & NFSMNT_NQNFS) { 804 if (nqnfs_callback(nmp, mrep, md, dpos)) 805 nfsstats.rpcinvalid++; 806 } else 807 #endif 808 { 809 nfsstats.rpcinvalid++; 810 m_freem(mrep); 811 } 812 nfsmout: 813 if (myrep->r_flags & R_GETONEREP) 814 return (0); 815 continue; 816 } 817 818 /* 819 * Loop through the request list to match up the reply 820 * Iff no match, just drop the datagram 821 */ 822 TAILQ_FOREACH(rep, &nfs_reqq, r_chain) { 823 if (rep->r_mrep == NULL && rxid == rep->r_xid) { 824 /* Found it.. */ 825 rep->r_mrep = mrep; 826 rep->r_md = md; 827 rep->r_dpos = dpos; 828 if (nfsrtton) { 829 struct rttl *rt; 830 831 rt = &nfsrtt.rttl[nfsrtt.pos]; 832 rt->proc = rep->r_procnum; 833 rt->rto = NFS_RTO(nmp, proct[rep->r_procnum]); 834 rt->sent = nmp->nm_sent; 835 rt->cwnd = nmp->nm_cwnd; 836 rt->srtt = nmp->nm_srtt[proct[rep->r_procnum] - 1]; 837 rt->sdrtt = nmp->nm_sdrtt[proct[rep->r_procnum] - 1]; 838 rt->fsid = nmp->nm_mountp->mnt_stat.f_fsid; 839 rt->tstamp = time; 840 if (rep->r_flags & R_TIMING) 841 rt->rtt = rep->r_rtt; 842 else 843 rt->rtt = 1000000; 844 nfsrtt.pos = (nfsrtt.pos + 1) % NFSRTTLOGSIZ; 845 } 846 /* 847 * Update congestion window. 848 * Do the additive increase of 849 * one rpc/rtt. 850 */ 851 if (nmp->nm_cwnd <= nmp->nm_sent) { 852 nmp->nm_cwnd += 853 (NFS_CWNDSCALE * NFS_CWNDSCALE + 854 (nmp->nm_cwnd >> 1)) / nmp->nm_cwnd; 855 if (nmp->nm_cwnd > NFS_MAXCWND) 856 nmp->nm_cwnd = NFS_MAXCWND; 857 } 858 rep->r_flags &= ~R_SENT; 859 nmp->nm_sent -= NFS_CWNDSCALE; 860 /* 861 * Update rtt using a gain of 0.125 on the mean 862 * and a gain of 0.25 on the deviation. 863 */ 864 if (rep->r_flags & R_TIMING) { 865 /* 866 * Since the timer resolution of 867 * NFS_HZ is so course, it can often 868 * result in r_rtt == 0. Since 869 * r_rtt == N means that the actual 870 * rtt is between N+dt and N+2-dt ticks, 871 * add 1. 872 */ 873 t1 = rep->r_rtt + 1; 874 t1 -= (NFS_SRTT(rep) >> 3); 875 NFS_SRTT(rep) += t1; 876 if (t1 < 0) 877 t1 = -t1; 878 t1 -= (NFS_SDRTT(rep) >> 2); 879 NFS_SDRTT(rep) += t1; 880 } 881 nmp->nm_timeouts = 0; 882 break; 883 } 884 } 885 /* 886 * If not matched to a request, drop it. 887 * If it's mine, get out. 888 */ 889 if (rep == 0) { 890 nfsstats.rpcunexpected++; 891 m_freem(mrep); 892 } else if (rep == myrep) { 893 if (rep->r_mrep == NULL) 894 panic("nfsreply nil"); 895 return (0); 896 } 897 if (myrep->r_flags & R_GETONEREP) 898 return (0); 899 } 900 } 901 902 /* 903 * nfs_request - goes something like this 904 * - fill in request struct 905 * - links it into list 906 * - calls nfs_send() for first transmit 907 * - calls nfs_receive() to get reply 908 * - break down rpc header and return with nfs reply pointed to 909 * by mrep or error 910 * nb: always frees up mreq mbuf list 911 */ 912 int 913 nfs_request(np, mrest, procnum, procp, cred, mrp, mdp, dposp) 914 struct nfsnode *np; 915 struct mbuf *mrest; 916 int procnum; 917 struct proc *procp; 918 struct ucred *cred; 919 struct mbuf **mrp; 920 struct mbuf **mdp; 921 caddr_t *dposp; 922 { 923 struct mbuf *m, *mrep; 924 struct nfsreq *rep; 925 u_int32_t *tl; 926 int i; 927 struct nfsmount *nmp; 928 struct mbuf *md, *mheadend; 929 char nickv[RPCX_NICKVERF]; 930 time_t reqtime, waituntil; 931 caddr_t dpos, cp2; 932 int t1, s, error = 0, mrest_len, auth_len, auth_type; 933 int trylater_delay = NQ_TRYLATERDEL, trylater_cnt = 0, failed_auth = 0; 934 int verf_len, verf_type; 935 u_int32_t xid; 936 char *auth_str, *verf_str; 937 NFSKERBKEY_T key; /* save session key */ 938 #ifndef NFS_V2_ONLY 939 int nqlflag, cachable; 940 u_quad_t frev; 941 #endif 942 943 KASSERT(cred != NULL); 944 nmp = VFSTONFS(np->n_vnode->v_mount); 945 MALLOC(rep, struct nfsreq *, sizeof(struct nfsreq), M_NFSREQ, M_WAITOK); 946 rep->r_nmp = nmp; 947 rep->r_procp = procp; 948 rep->r_procnum = procnum; 949 i = 0; 950 m = mrest; 951 while (m) { 952 i += m->m_len; 953 m = m->m_next; 954 } 955 mrest_len = i; 956 957 /* 958 * Get the RPC header with authorization. 959 */ 960 kerbauth: 961 verf_str = auth_str = (char *)0; 962 if (nmp->nm_flag & NFSMNT_KERB) { 963 verf_str = nickv; 964 verf_len = sizeof (nickv); 965 auth_type = RPCAUTH_KERB4; 966 memset((caddr_t)key, 0, sizeof (key)); 967 if (failed_auth || nfs_getnickauth(nmp, cred, &auth_str, 968 &auth_len, verf_str, verf_len)) { 969 error = nfs_getauth(nmp, rep, cred, &auth_str, 970 &auth_len, verf_str, &verf_len, key); 971 if (error) { 972 free((caddr_t)rep, M_NFSREQ); 973 m_freem(mrest); 974 return (error); 975 } 976 } 977 } else { 978 auth_type = RPCAUTH_UNIX; 979 auth_len = (((cred->cr_ngroups > nmp->nm_numgrps) ? 980 nmp->nm_numgrps : cred->cr_ngroups) << 2) + 981 5 * NFSX_UNSIGNED; 982 } 983 m = nfsm_rpchead(cred, nmp->nm_flag, procnum, auth_type, auth_len, 984 auth_str, verf_len, verf_str, mrest, mrest_len, &mheadend, &xid); 985 if (auth_str) 986 free(auth_str, M_TEMP); 987 988 /* 989 * For stream protocols, insert a Sun RPC Record Mark. 990 */ 991 if (nmp->nm_sotype == SOCK_STREAM) { 992 M_PREPEND(m, NFSX_UNSIGNED, M_WAIT); 993 *mtod(m, u_int32_t *) = htonl(0x80000000 | 994 (m->m_pkthdr.len - NFSX_UNSIGNED)); 995 } 996 rep->r_mreq = m; 997 rep->r_xid = xid; 998 tryagain: 999 if (nmp->nm_flag & NFSMNT_SOFT) 1000 rep->r_retry = nmp->nm_retry; 1001 else 1002 rep->r_retry = NFS_MAXREXMIT + 1; /* past clip limit */ 1003 rep->r_rtt = rep->r_rexmit = 0; 1004 if (proct[procnum] > 0) 1005 rep->r_flags = R_TIMING; 1006 else 1007 rep->r_flags = 0; 1008 rep->r_mrep = NULL; 1009 1010 /* 1011 * Do the client side RPC. 1012 */ 1013 nfsstats.rpcrequests++; 1014 /* 1015 * Chain request into list of outstanding requests. Be sure 1016 * to put it LAST so timer finds oldest requests first. 1017 */ 1018 s = splsoftnet(); 1019 TAILQ_INSERT_TAIL(&nfs_reqq, rep, r_chain); 1020 1021 /* Get send time for nqnfs */ 1022 reqtime = time.tv_sec; 1023 1024 /* 1025 * If backing off another request or avoiding congestion, don't 1026 * send this one now but let timer do it. If not timing a request, 1027 * do it now. 1028 */ 1029 if (nmp->nm_so && (nmp->nm_sotype != SOCK_DGRAM || 1030 (nmp->nm_flag & NFSMNT_DUMBTIMR) || 1031 nmp->nm_sent < nmp->nm_cwnd)) { 1032 splx(s); 1033 if (nmp->nm_soflags & PR_CONNREQUIRED) 1034 error = nfs_sndlock(&nmp->nm_iflag, rep); 1035 if (!error) { 1036 m = m_copym(rep->r_mreq, 0, M_COPYALL, M_WAIT); 1037 error = nfs_send(nmp->nm_so, nmp->nm_nam, m, rep); 1038 if (nmp->nm_soflags & PR_CONNREQUIRED) 1039 nfs_sndunlock(&nmp->nm_iflag); 1040 } 1041 if (!error && (rep->r_flags & R_MUSTRESEND) == 0) { 1042 nmp->nm_sent += NFS_CWNDSCALE; 1043 rep->r_flags |= R_SENT; 1044 } 1045 } else { 1046 splx(s); 1047 rep->r_rtt = -1; 1048 } 1049 1050 /* 1051 * Wait for the reply from our send or the timer's. 1052 */ 1053 if (!error || error == EPIPE) 1054 error = nfs_reply(rep); 1055 1056 /* 1057 * RPC done, unlink the request. 1058 */ 1059 s = splsoftnet(); 1060 TAILQ_REMOVE(&nfs_reqq, rep, r_chain); 1061 splx(s); 1062 1063 /* 1064 * Decrement the outstanding request count. 1065 */ 1066 if (rep->r_flags & R_SENT) { 1067 rep->r_flags &= ~R_SENT; /* paranoia */ 1068 nmp->nm_sent -= NFS_CWNDSCALE; 1069 } 1070 1071 /* 1072 * If there was a successful reply and a tprintf msg. 1073 * tprintf a response. 1074 */ 1075 if (!error && (rep->r_flags & R_TPRINTFMSG)) 1076 nfs_msg(rep->r_procp, nmp->nm_mountp->mnt_stat.f_mntfromname, 1077 "is alive again"); 1078 mrep = rep->r_mrep; 1079 md = rep->r_md; 1080 dpos = rep->r_dpos; 1081 if (error) { 1082 m_freem(rep->r_mreq); 1083 free((caddr_t)rep, M_NFSREQ); 1084 return (error); 1085 } 1086 1087 /* 1088 * break down the rpc header and check if ok 1089 */ 1090 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 1091 if (*tl++ == rpc_msgdenied) { 1092 if (*tl == rpc_mismatch) 1093 error = EOPNOTSUPP; 1094 else if ((nmp->nm_flag & NFSMNT_KERB) && *tl++ == rpc_autherr) { 1095 if (!failed_auth) { 1096 failed_auth++; 1097 mheadend->m_next = (struct mbuf *)0; 1098 m_freem(mrep); 1099 m_freem(rep->r_mreq); 1100 goto kerbauth; 1101 } else 1102 error = EAUTH; 1103 } else 1104 error = EACCES; 1105 m_freem(mrep); 1106 m_freem(rep->r_mreq); 1107 free((caddr_t)rep, M_NFSREQ); 1108 return (error); 1109 } 1110 1111 /* 1112 * Grab any Kerberos verifier, otherwise just throw it away. 1113 */ 1114 verf_type = fxdr_unsigned(int, *tl++); 1115 i = fxdr_unsigned(int32_t, *tl); 1116 if ((nmp->nm_flag & NFSMNT_KERB) && verf_type == RPCAUTH_KERB4) { 1117 error = nfs_savenickauth(nmp, cred, i, key, &md, &dpos, mrep); 1118 if (error) 1119 goto nfsmout; 1120 } else if (i > 0) 1121 nfsm_adv(nfsm_rndup(i)); 1122 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1123 /* 0 == ok */ 1124 if (*tl == 0) { 1125 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1126 if (*tl != 0) { 1127 error = fxdr_unsigned(int, *tl); 1128 if ((nmp->nm_flag & NFSMNT_NFSV3) && 1129 error == NFSERR_TRYLATER) { 1130 m_freem(mrep); 1131 error = 0; 1132 waituntil = time.tv_sec + trylater_delay; 1133 while (time.tv_sec < waituntil) 1134 (void) tsleep((caddr_t)&lbolt, 1135 PSOCK, "nqnfstry", 0); 1136 trylater_delay *= nfs_backoff[trylater_cnt]; 1137 if (trylater_cnt < 7) 1138 trylater_cnt++; 1139 goto tryagain; 1140 } 1141 1142 /* 1143 * If the File Handle was stale, invalidate the 1144 * lookup cache, just in case. 1145 */ 1146 if (error == ESTALE) 1147 cache_purge(NFSTOV(np)); 1148 if (nmp->nm_flag & NFSMNT_NFSV3) { 1149 *mrp = mrep; 1150 *mdp = md; 1151 *dposp = dpos; 1152 error |= NFSERR_RETERR; 1153 } else 1154 m_freem(mrep); 1155 m_freem(rep->r_mreq); 1156 free((caddr_t)rep, M_NFSREQ); 1157 return (error); 1158 } 1159 1160 #ifndef NFS_V2_ONLY 1161 /* 1162 * For nqnfs, get any lease in reply 1163 */ 1164 if (nmp->nm_flag & NFSMNT_NQNFS) { 1165 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1166 if (*tl) { 1167 nqlflag = fxdr_unsigned(int, *tl); 1168 nfsm_dissect(tl, u_int32_t *, 4*NFSX_UNSIGNED); 1169 cachable = fxdr_unsigned(int, *tl++); 1170 reqtime += fxdr_unsigned(int, *tl++); 1171 if (reqtime > time.tv_sec) { 1172 frev = fxdr_hyper(tl); 1173 nqnfs_clientlease(nmp, np, nqlflag, 1174 cachable, reqtime, frev); 1175 } 1176 } 1177 } 1178 #endif 1179 *mrp = mrep; 1180 *mdp = md; 1181 *dposp = dpos; 1182 m_freem(rep->r_mreq); 1183 FREE((caddr_t)rep, M_NFSREQ); 1184 return (0); 1185 } 1186 m_freem(mrep); 1187 error = EPROTONOSUPPORT; 1188 nfsmout: 1189 m_freem(rep->r_mreq); 1190 free((caddr_t)rep, M_NFSREQ); 1191 return (error); 1192 } 1193 #endif /* NFS */ 1194 1195 /* 1196 * Generate the rpc reply header 1197 * siz arg. is used to decide if adding a cluster is worthwhile 1198 */ 1199 int 1200 nfs_rephead(siz, nd, slp, err, cache, frev, mrq, mbp, bposp) 1201 int siz; 1202 struct nfsrv_descript *nd; 1203 struct nfssvc_sock *slp; 1204 int err; 1205 int cache; 1206 u_quad_t *frev; 1207 struct mbuf **mrq; 1208 struct mbuf **mbp; 1209 caddr_t *bposp; 1210 { 1211 u_int32_t *tl; 1212 struct mbuf *mreq; 1213 caddr_t bpos; 1214 struct mbuf *mb; 1215 1216 mreq = m_gethdr(M_WAIT, MT_DATA); 1217 MCLAIM(mreq, &nfs_mowner); 1218 mb = mreq; 1219 /* 1220 * If this is a big reply, use a cluster else 1221 * try and leave leading space for the lower level headers. 1222 */ 1223 siz += RPC_REPLYSIZ; 1224 if (siz >= max_datalen) { 1225 m_clget(mreq, M_WAIT); 1226 } else 1227 mreq->m_data += max_hdr; 1228 tl = mtod(mreq, u_int32_t *); 1229 mreq->m_len = 6 * NFSX_UNSIGNED; 1230 bpos = ((caddr_t)tl) + mreq->m_len; 1231 *tl++ = txdr_unsigned(nd->nd_retxid); 1232 *tl++ = rpc_reply; 1233 if (err == ERPCMISMATCH || (err & NFSERR_AUTHERR)) { 1234 *tl++ = rpc_msgdenied; 1235 if (err & NFSERR_AUTHERR) { 1236 *tl++ = rpc_autherr; 1237 *tl = txdr_unsigned(err & ~NFSERR_AUTHERR); 1238 mreq->m_len -= NFSX_UNSIGNED; 1239 bpos -= NFSX_UNSIGNED; 1240 } else { 1241 *tl++ = rpc_mismatch; 1242 *tl++ = txdr_unsigned(RPC_VER2); 1243 *tl = txdr_unsigned(RPC_VER2); 1244 } 1245 } else { 1246 *tl++ = rpc_msgaccepted; 1247 1248 /* 1249 * For Kerberos authentication, we must send the nickname 1250 * verifier back, otherwise just RPCAUTH_NULL. 1251 */ 1252 if (nd->nd_flag & ND_KERBFULL) { 1253 struct nfsuid *nuidp; 1254 struct timeval ktvin, ktvout; 1255 1256 LIST_FOREACH(nuidp, NUIDHASH(slp, nd->nd_cr.cr_uid), 1257 nu_hash) { 1258 if (nuidp->nu_cr.cr_uid == nd->nd_cr.cr_uid && 1259 (!nd->nd_nam2 || netaddr_match( 1260 NU_NETFAM(nuidp), &nuidp->nu_haddr, 1261 nd->nd_nam2))) 1262 break; 1263 } 1264 if (nuidp) { 1265 ktvin.tv_sec = 1266 txdr_unsigned(nuidp->nu_timestamp.tv_sec 1267 - 1); 1268 ktvin.tv_usec = 1269 txdr_unsigned(nuidp->nu_timestamp.tv_usec); 1270 1271 /* 1272 * Encrypt the timestamp in ecb mode using the 1273 * session key. 1274 */ 1275 #ifdef NFSKERB 1276 XXX 1277 #endif 1278 1279 *tl++ = rpc_auth_kerb; 1280 *tl++ = txdr_unsigned(3 * NFSX_UNSIGNED); 1281 *tl = ktvout.tv_sec; 1282 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 1283 *tl++ = ktvout.tv_usec; 1284 *tl++ = txdr_unsigned(nuidp->nu_cr.cr_uid); 1285 } else { 1286 *tl++ = 0; 1287 *tl++ = 0; 1288 } 1289 } else { 1290 *tl++ = 0; 1291 *tl++ = 0; 1292 } 1293 switch (err) { 1294 case EPROGUNAVAIL: 1295 *tl = txdr_unsigned(RPC_PROGUNAVAIL); 1296 break; 1297 case EPROGMISMATCH: 1298 *tl = txdr_unsigned(RPC_PROGMISMATCH); 1299 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1300 if (nd->nd_flag & ND_NQNFS) { 1301 *tl++ = txdr_unsigned(3); 1302 *tl = txdr_unsigned(3); 1303 } else { 1304 *tl++ = txdr_unsigned(2); 1305 *tl = txdr_unsigned(3); 1306 } 1307 break; 1308 case EPROCUNAVAIL: 1309 *tl = txdr_unsigned(RPC_PROCUNAVAIL); 1310 break; 1311 case EBADRPC: 1312 *tl = txdr_unsigned(RPC_GARBAGE); 1313 break; 1314 default: 1315 *tl = 0; 1316 if (err != NFSERR_RETVOID) { 1317 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1318 if (err) 1319 *tl = txdr_unsigned(nfsrv_errmap(nd, err)); 1320 else 1321 *tl = 0; 1322 } 1323 break; 1324 }; 1325 } 1326 1327 /* 1328 * For nqnfs, piggyback lease as requested. 1329 */ 1330 if ((nd->nd_flag & ND_NQNFS) && err == 0) { 1331 if (nd->nd_flag & ND_LEASE) { 1332 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1333 *tl++ = txdr_unsigned(nd->nd_flag & ND_LEASE); 1334 *tl++ = txdr_unsigned(cache); 1335 *tl++ = txdr_unsigned(nd->nd_duration); 1336 txdr_hyper(*frev, tl); 1337 } else { 1338 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1339 *tl = 0; 1340 } 1341 } 1342 if (mrq != NULL) 1343 *mrq = mreq; 1344 *mbp = mb; 1345 *bposp = bpos; 1346 if (err != 0 && err != NFSERR_RETVOID) 1347 nfsstats.srvrpc_errs++; 1348 return (0); 1349 } 1350 1351 /* 1352 * Nfs timer routine 1353 * Scan the nfsreq list and retranmit any requests that have timed out 1354 * To avoid retransmission attempts on STREAM sockets (in the future) make 1355 * sure to set the r_retry field to 0 (implies nm_retry == 0). 1356 */ 1357 void 1358 nfs_timer(arg) 1359 void *arg; /* never used */ 1360 { 1361 struct nfsreq *rep; 1362 struct mbuf *m; 1363 struct socket *so; 1364 struct nfsmount *nmp; 1365 int timeo; 1366 int s, error; 1367 #ifdef NFSSERVER 1368 struct nfssvc_sock *slp; 1369 static long lasttime = 0; 1370 u_quad_t cur_usec; 1371 #endif 1372 1373 s = splsoftnet(); 1374 TAILQ_FOREACH(rep, &nfs_reqq, r_chain) { 1375 nmp = rep->r_nmp; 1376 if (rep->r_mrep || (rep->r_flags & R_SOFTTERM)) 1377 continue; 1378 if (nfs_sigintr(nmp, rep, rep->r_procp)) { 1379 rep->r_flags |= R_SOFTTERM; 1380 continue; 1381 } 1382 if (rep->r_rtt >= 0) { 1383 rep->r_rtt++; 1384 if (nmp->nm_flag & NFSMNT_DUMBTIMR) 1385 timeo = nmp->nm_timeo; 1386 else 1387 timeo = NFS_RTO(nmp, proct[rep->r_procnum]); 1388 if (nmp->nm_timeouts > 0) 1389 timeo *= nfs_backoff[nmp->nm_timeouts - 1]; 1390 if (rep->r_rtt <= timeo) 1391 continue; 1392 if (nmp->nm_timeouts < 8) 1393 nmp->nm_timeouts++; 1394 } 1395 /* 1396 * Check for server not responding 1397 */ 1398 if ((rep->r_flags & R_TPRINTFMSG) == 0 && 1399 rep->r_rexmit > nmp->nm_deadthresh) { 1400 nfs_msg(rep->r_procp, 1401 nmp->nm_mountp->mnt_stat.f_mntfromname, 1402 "not responding"); 1403 rep->r_flags |= R_TPRINTFMSG; 1404 } 1405 if (rep->r_rexmit >= rep->r_retry) { /* too many */ 1406 nfsstats.rpctimeouts++; 1407 rep->r_flags |= R_SOFTTERM; 1408 continue; 1409 } 1410 if (nmp->nm_sotype != SOCK_DGRAM) { 1411 if (++rep->r_rexmit > NFS_MAXREXMIT) 1412 rep->r_rexmit = NFS_MAXREXMIT; 1413 continue; 1414 } 1415 if ((so = nmp->nm_so) == NULL) 1416 continue; 1417 1418 /* 1419 * If there is enough space and the window allows.. 1420 * Resend it 1421 * Set r_rtt to -1 in case we fail to send it now. 1422 */ 1423 rep->r_rtt = -1; 1424 if (sbspace(&so->so_snd) >= rep->r_mreq->m_pkthdr.len && 1425 ((nmp->nm_flag & NFSMNT_DUMBTIMR) || 1426 (rep->r_flags & R_SENT) || 1427 nmp->nm_sent < nmp->nm_cwnd) && 1428 (m = m_copym(rep->r_mreq, 0, M_COPYALL, M_DONTWAIT))){ 1429 if (so->so_state & SS_ISCONNECTED) 1430 error = (*so->so_proto->pr_usrreq)(so, PRU_SEND, m, 1431 (struct mbuf *)0, (struct mbuf *)0, (struct proc *)0); 1432 else 1433 error = (*so->so_proto->pr_usrreq)(so, PRU_SEND, m, 1434 nmp->nm_nam, (struct mbuf *)0, (struct proc *)0); 1435 if (error) { 1436 if (NFSIGNORE_SOERROR(nmp->nm_soflags, error)) { 1437 #ifdef DEBUG 1438 printf("nfs_timer: ignoring error %d\n", 1439 error); 1440 #endif 1441 so->so_error = 0; 1442 } 1443 } else { 1444 /* 1445 * Iff first send, start timing 1446 * else turn timing off, backoff timer 1447 * and divide congestion window by 2. 1448 */ 1449 if (rep->r_flags & R_SENT) { 1450 rep->r_flags &= ~R_TIMING; 1451 if (++rep->r_rexmit > NFS_MAXREXMIT) 1452 rep->r_rexmit = NFS_MAXREXMIT; 1453 nmp->nm_cwnd >>= 1; 1454 if (nmp->nm_cwnd < NFS_CWNDSCALE) 1455 nmp->nm_cwnd = NFS_CWNDSCALE; 1456 nfsstats.rpcretries++; 1457 } else { 1458 rep->r_flags |= R_SENT; 1459 nmp->nm_sent += NFS_CWNDSCALE; 1460 } 1461 rep->r_rtt = 0; 1462 } 1463 } 1464 } 1465 1466 #ifdef NFSSERVER 1467 /* 1468 * Call the nqnfs server timer once a second to handle leases. 1469 */ 1470 if (lasttime != time.tv_sec) { 1471 lasttime = time.tv_sec; 1472 nqnfs_serverd(); 1473 } 1474 1475 /* 1476 * Scan the write gathering queues for writes that need to be 1477 * completed now. 1478 */ 1479 cur_usec = (u_quad_t)time.tv_sec * 1000000 + (u_quad_t)time.tv_usec; 1480 TAILQ_FOREACH(slp, &nfssvc_sockhead, ns_chain) { 1481 if (LIST_FIRST(&slp->ns_tq) && 1482 LIST_FIRST(&slp->ns_tq)->nd_time <= cur_usec) 1483 nfsrv_wakenfsd(slp); 1484 } 1485 #endif /* NFSSERVER */ 1486 splx(s); 1487 callout_reset(&nfs_timer_ch, nfs_ticks, nfs_timer, NULL); 1488 } 1489 1490 /*ARGSUSED*/ 1491 void 1492 nfs_exit(p, v) 1493 struct proc *p; 1494 void *v; 1495 { 1496 struct nfsreq *rp; 1497 int s = splsoftnet(); 1498 1499 TAILQ_FOREACH(rp, &nfs_reqq, r_chain) { 1500 if (rp->r_procp == p) 1501 TAILQ_REMOVE(&nfs_reqq, rp, r_chain); 1502 } 1503 splx(s); 1504 } 1505 1506 /* 1507 * Test for a termination condition pending on the process. 1508 * This is used for NFSMNT_INT mounts. 1509 */ 1510 int 1511 nfs_sigintr(nmp, rep, p) 1512 struct nfsmount *nmp; 1513 struct nfsreq *rep; 1514 struct proc *p; 1515 { 1516 sigset_t ss; 1517 1518 if (rep && (rep->r_flags & R_SOFTTERM)) 1519 return (EINTR); 1520 if (!(nmp->nm_flag & NFSMNT_INT)) 1521 return (0); 1522 if (p) { 1523 sigpending1(p, &ss); 1524 #if 0 1525 sigminusset(&p->p_sigctx.ps_sigignore, &ss); 1526 #endif 1527 if (sigismember(&ss, SIGINT) || sigismember(&ss, SIGTERM) || 1528 sigismember(&ss, SIGKILL) || sigismember(&ss, SIGHUP) || 1529 sigismember(&ss, SIGQUIT)) 1530 return (EINTR); 1531 } 1532 return (0); 1533 } 1534 1535 /* 1536 * Lock a socket against others. 1537 * Necessary for STREAM sockets to ensure you get an entire rpc request/reply 1538 * and also to avoid race conditions between the processes with nfs requests 1539 * in progress when a reconnect is necessary. 1540 */ 1541 int 1542 nfs_sndlock(flagp, rep) 1543 int *flagp; 1544 struct nfsreq *rep; 1545 { 1546 struct proc *p; 1547 int slpflag = 0, slptimeo = 0; 1548 1549 if (rep) { 1550 p = rep->r_procp; 1551 if (rep->r_nmp->nm_flag & NFSMNT_INT) 1552 slpflag = PCATCH; 1553 } else 1554 p = (struct proc *)0; 1555 while (*flagp & NFSMNT_SNDLOCK) { 1556 if (nfs_sigintr(rep->r_nmp, rep, p)) 1557 return (EINTR); 1558 *flagp |= NFSMNT_WANTSND; 1559 (void) tsleep((caddr_t)flagp, slpflag | (PZERO - 1), "nfsndlck", 1560 slptimeo); 1561 if (slpflag == PCATCH) { 1562 slpflag = 0; 1563 slptimeo = 2 * hz; 1564 } 1565 } 1566 *flagp |= NFSMNT_SNDLOCK; 1567 return (0); 1568 } 1569 1570 /* 1571 * Unlock the stream socket for others. 1572 */ 1573 void 1574 nfs_sndunlock(flagp) 1575 int *flagp; 1576 { 1577 1578 if ((*flagp & NFSMNT_SNDLOCK) == 0) 1579 panic("nfs sndunlock"); 1580 *flagp &= ~NFSMNT_SNDLOCK; 1581 if (*flagp & NFSMNT_WANTSND) { 1582 *flagp &= ~NFSMNT_WANTSND; 1583 wakeup((caddr_t)flagp); 1584 } 1585 } 1586 1587 int 1588 nfs_rcvlock(rep) 1589 struct nfsreq *rep; 1590 { 1591 struct nfsmount *nmp = rep->r_nmp; 1592 int *flagp = &nmp->nm_iflag; 1593 int slpflag, slptimeo = 0; 1594 int error = 0; 1595 1596 if (*flagp & NFSMNT_DISMNT) 1597 return EIO; 1598 1599 if (*flagp & NFSMNT_INT) 1600 slpflag = PCATCH; 1601 else 1602 slpflag = 0; 1603 simple_lock(&nmp->nm_slock); 1604 while (*flagp & NFSMNT_RCVLOCK) { 1605 if (nfs_sigintr(rep->r_nmp, rep, rep->r_procp)) { 1606 error = EINTR; 1607 goto quit; 1608 } 1609 *flagp |= NFSMNT_WANTRCV; 1610 nmp->nm_waiters++; 1611 (void) ltsleep(flagp, slpflag | (PZERO - 1), "nfsrcvlk", 1612 slptimeo, &nmp->nm_slock); 1613 nmp->nm_waiters--; 1614 if (*flagp & NFSMNT_DISMNT) { 1615 wakeup(&nmp->nm_waiters); 1616 error = EIO; 1617 goto quit; 1618 } 1619 /* If our reply was received while we were sleeping, 1620 * then just return without taking the lock to avoid a 1621 * situation where a single iod could 'capture' the 1622 * receive lock. 1623 */ 1624 if (rep->r_mrep != NULL) { 1625 error = EALREADY; 1626 goto quit; 1627 } 1628 if (slpflag == PCATCH) { 1629 slpflag = 0; 1630 slptimeo = 2 * hz; 1631 } 1632 } 1633 *flagp |= NFSMNT_RCVLOCK; 1634 quit: 1635 simple_unlock(&nmp->nm_slock); 1636 return error; 1637 } 1638 1639 /* 1640 * Unlock the stream socket for others. 1641 */ 1642 void 1643 nfs_rcvunlock(nmp) 1644 struct nfsmount *nmp; 1645 { 1646 int *flagp = &nmp->nm_iflag; 1647 1648 simple_lock(&nmp->nm_slock); 1649 if ((*flagp & NFSMNT_RCVLOCK) == 0) 1650 panic("nfs rcvunlock"); 1651 *flagp &= ~NFSMNT_RCVLOCK; 1652 if (*flagp & NFSMNT_WANTRCV) { 1653 *flagp &= ~NFSMNT_WANTRCV; 1654 wakeup((caddr_t)flagp); 1655 } 1656 simple_unlock(&nmp->nm_slock); 1657 } 1658 1659 /* 1660 * Parse an RPC request 1661 * - verify it 1662 * - fill in the cred struct. 1663 */ 1664 int 1665 nfs_getreq(nd, nfsd, has_header) 1666 struct nfsrv_descript *nd; 1667 struct nfsd *nfsd; 1668 int has_header; 1669 { 1670 int len, i; 1671 u_int32_t *tl; 1672 int32_t t1; 1673 struct uio uio; 1674 struct iovec iov; 1675 caddr_t dpos, cp2, cp; 1676 u_int32_t nfsvers, auth_type; 1677 uid_t nickuid; 1678 int error = 0, nqnfs = 0, ticklen; 1679 struct mbuf *mrep, *md; 1680 struct nfsuid *nuidp; 1681 struct timeval tvin, tvout; 1682 1683 mrep = nd->nd_mrep; 1684 md = nd->nd_md; 1685 dpos = nd->nd_dpos; 1686 if (has_header) { 1687 nfsm_dissect(tl, u_int32_t *, 10 * NFSX_UNSIGNED); 1688 nd->nd_retxid = fxdr_unsigned(u_int32_t, *tl++); 1689 if (*tl++ != rpc_call) { 1690 m_freem(mrep); 1691 return (EBADRPC); 1692 } 1693 } else 1694 nfsm_dissect(tl, u_int32_t *, 8 * NFSX_UNSIGNED); 1695 nd->nd_repstat = 0; 1696 nd->nd_flag = 0; 1697 if (*tl++ != rpc_vers) { 1698 nd->nd_repstat = ERPCMISMATCH; 1699 nd->nd_procnum = NFSPROC_NOOP; 1700 return (0); 1701 } 1702 if (*tl != nfs_prog) { 1703 if (*tl == nqnfs_prog) 1704 nqnfs++; 1705 else { 1706 nd->nd_repstat = EPROGUNAVAIL; 1707 nd->nd_procnum = NFSPROC_NOOP; 1708 return (0); 1709 } 1710 } 1711 tl++; 1712 nfsvers = fxdr_unsigned(u_int32_t, *tl++); 1713 if (((nfsvers < NFS_VER2 || nfsvers > NFS_VER3) && !nqnfs) || 1714 (nfsvers != NQNFS_VER3 && nqnfs)) { 1715 nd->nd_repstat = EPROGMISMATCH; 1716 nd->nd_procnum = NFSPROC_NOOP; 1717 return (0); 1718 } 1719 if (nqnfs) 1720 nd->nd_flag = (ND_NFSV3 | ND_NQNFS); 1721 else if (nfsvers == NFS_VER3) 1722 nd->nd_flag = ND_NFSV3; 1723 nd->nd_procnum = fxdr_unsigned(u_int32_t, *tl++); 1724 if (nd->nd_procnum == NFSPROC_NULL) 1725 return (0); 1726 if (nd->nd_procnum >= NFS_NPROCS || 1727 (!nqnfs && nd->nd_procnum >= NQNFSPROC_GETLEASE) || 1728 (!nd->nd_flag && nd->nd_procnum > NFSV2PROC_STATFS)) { 1729 nd->nd_repstat = EPROCUNAVAIL; 1730 nd->nd_procnum = NFSPROC_NOOP; 1731 return (0); 1732 } 1733 if ((nd->nd_flag & ND_NFSV3) == 0) 1734 nd->nd_procnum = nfsv3_procid[nd->nd_procnum]; 1735 auth_type = *tl++; 1736 len = fxdr_unsigned(int, *tl++); 1737 if (len < 0 || len > RPCAUTH_MAXSIZ) { 1738 m_freem(mrep); 1739 return (EBADRPC); 1740 } 1741 1742 nd->nd_flag &= ~ND_KERBAUTH; 1743 /* 1744 * Handle auth_unix or auth_kerb. 1745 */ 1746 if (auth_type == rpc_auth_unix) { 1747 len = fxdr_unsigned(int, *++tl); 1748 if (len < 0 || len > NFS_MAXNAMLEN) { 1749 m_freem(mrep); 1750 return (EBADRPC); 1751 } 1752 nfsm_adv(nfsm_rndup(len)); 1753 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 1754 memset((caddr_t)&nd->nd_cr, 0, sizeof (struct ucred)); 1755 nd->nd_cr.cr_ref = 1; 1756 nd->nd_cr.cr_uid = fxdr_unsigned(uid_t, *tl++); 1757 nd->nd_cr.cr_gid = fxdr_unsigned(gid_t, *tl++); 1758 len = fxdr_unsigned(int, *tl); 1759 if (len < 0 || len > RPCAUTH_UNIXGIDS) { 1760 m_freem(mrep); 1761 return (EBADRPC); 1762 } 1763 nfsm_dissect(tl, u_int32_t *, (len + 2) * NFSX_UNSIGNED); 1764 for (i = 0; i < len; i++) 1765 if (i < NGROUPS) 1766 nd->nd_cr.cr_groups[i] = fxdr_unsigned(gid_t, *tl++); 1767 else 1768 tl++; 1769 nd->nd_cr.cr_ngroups = (len > NGROUPS) ? NGROUPS : len; 1770 if (nd->nd_cr.cr_ngroups > 1) 1771 nfsrvw_sort(nd->nd_cr.cr_groups, nd->nd_cr.cr_ngroups); 1772 len = fxdr_unsigned(int, *++tl); 1773 if (len < 0 || len > RPCAUTH_MAXSIZ) { 1774 m_freem(mrep); 1775 return (EBADRPC); 1776 } 1777 if (len > 0) 1778 nfsm_adv(nfsm_rndup(len)); 1779 } else if (auth_type == rpc_auth_kerb) { 1780 switch (fxdr_unsigned(int, *tl++)) { 1781 case RPCAKN_FULLNAME: 1782 ticklen = fxdr_unsigned(int, *tl); 1783 *((u_int32_t *)nfsd->nfsd_authstr) = *tl; 1784 uio.uio_resid = nfsm_rndup(ticklen) + NFSX_UNSIGNED; 1785 nfsd->nfsd_authlen = uio.uio_resid + NFSX_UNSIGNED; 1786 if (uio.uio_resid > (len - 2 * NFSX_UNSIGNED)) { 1787 m_freem(mrep); 1788 return (EBADRPC); 1789 } 1790 uio.uio_offset = 0; 1791 uio.uio_iov = &iov; 1792 uio.uio_iovcnt = 1; 1793 uio.uio_segflg = UIO_SYSSPACE; 1794 iov.iov_base = (caddr_t)&nfsd->nfsd_authstr[4]; 1795 iov.iov_len = RPCAUTH_MAXSIZ - 4; 1796 nfsm_mtouio(&uio, uio.uio_resid); 1797 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1798 if (*tl++ != rpc_auth_kerb || 1799 fxdr_unsigned(int, *tl) != 4 * NFSX_UNSIGNED) { 1800 printf("Bad kerb verifier\n"); 1801 nd->nd_repstat = (NFSERR_AUTHERR|AUTH_BADVERF); 1802 nd->nd_procnum = NFSPROC_NOOP; 1803 return (0); 1804 } 1805 nfsm_dissect(cp, caddr_t, 4 * NFSX_UNSIGNED); 1806 tl = (u_int32_t *)cp; 1807 if (fxdr_unsigned(int, *tl) != RPCAKN_FULLNAME) { 1808 printf("Not fullname kerb verifier\n"); 1809 nd->nd_repstat = (NFSERR_AUTHERR|AUTH_BADVERF); 1810 nd->nd_procnum = NFSPROC_NOOP; 1811 return (0); 1812 } 1813 cp += NFSX_UNSIGNED; 1814 memcpy(nfsd->nfsd_verfstr, cp, 3 * NFSX_UNSIGNED); 1815 nfsd->nfsd_verflen = 3 * NFSX_UNSIGNED; 1816 nd->nd_flag |= ND_KERBFULL; 1817 nfsd->nfsd_flag |= NFSD_NEEDAUTH; 1818 break; 1819 case RPCAKN_NICKNAME: 1820 if (len != 2 * NFSX_UNSIGNED) { 1821 printf("Kerb nickname short\n"); 1822 nd->nd_repstat = (NFSERR_AUTHERR|AUTH_BADCRED); 1823 nd->nd_procnum = NFSPROC_NOOP; 1824 return (0); 1825 } 1826 nickuid = fxdr_unsigned(uid_t, *tl); 1827 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1828 if (*tl++ != rpc_auth_kerb || 1829 fxdr_unsigned(int, *tl) != 3 * NFSX_UNSIGNED) { 1830 printf("Kerb nick verifier bad\n"); 1831 nd->nd_repstat = (NFSERR_AUTHERR|AUTH_BADVERF); 1832 nd->nd_procnum = NFSPROC_NOOP; 1833 return (0); 1834 } 1835 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 1836 tvin.tv_sec = *tl++; 1837 tvin.tv_usec = *tl; 1838 1839 LIST_FOREACH(nuidp, NUIDHASH(nfsd->nfsd_slp, nickuid), 1840 nu_hash) { 1841 if (nuidp->nu_cr.cr_uid == nickuid && 1842 (!nd->nd_nam2 || 1843 netaddr_match(NU_NETFAM(nuidp), 1844 &nuidp->nu_haddr, nd->nd_nam2))) 1845 break; 1846 } 1847 if (!nuidp) { 1848 nd->nd_repstat = 1849 (NFSERR_AUTHERR|AUTH_REJECTCRED); 1850 nd->nd_procnum = NFSPROC_NOOP; 1851 return (0); 1852 } 1853 1854 /* 1855 * Now, decrypt the timestamp using the session key 1856 * and validate it. 1857 */ 1858 #ifdef NFSKERB 1859 XXX 1860 #endif 1861 1862 tvout.tv_sec = fxdr_unsigned(long, tvout.tv_sec); 1863 tvout.tv_usec = fxdr_unsigned(long, tvout.tv_usec); 1864 if (nuidp->nu_expire < time.tv_sec || 1865 nuidp->nu_timestamp.tv_sec > tvout.tv_sec || 1866 (nuidp->nu_timestamp.tv_sec == tvout.tv_sec && 1867 nuidp->nu_timestamp.tv_usec > tvout.tv_usec)) { 1868 nuidp->nu_expire = 0; 1869 nd->nd_repstat = 1870 (NFSERR_AUTHERR|AUTH_REJECTVERF); 1871 nd->nd_procnum = NFSPROC_NOOP; 1872 return (0); 1873 } 1874 nfsrv_setcred(&nuidp->nu_cr, &nd->nd_cr); 1875 nd->nd_flag |= ND_KERBNICK; 1876 }; 1877 } else { 1878 nd->nd_repstat = (NFSERR_AUTHERR | AUTH_REJECTCRED); 1879 nd->nd_procnum = NFSPROC_NOOP; 1880 return (0); 1881 } 1882 1883 /* 1884 * For nqnfs, get piggybacked lease request. 1885 */ 1886 if (nqnfs && nd->nd_procnum != NQNFSPROC_EVICTED) { 1887 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1888 nd->nd_flag |= fxdr_unsigned(int, *tl); 1889 if (nd->nd_flag & ND_LEASE) { 1890 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1891 nd->nd_duration = fxdr_unsigned(u_int32_t, *tl); 1892 } else 1893 nd->nd_duration = NQ_MINLEASE; 1894 } else 1895 nd->nd_duration = NQ_MINLEASE; 1896 nd->nd_md = md; 1897 nd->nd_dpos = dpos; 1898 return (0); 1899 nfsmout: 1900 return (error); 1901 } 1902 1903 int 1904 nfs_msg(p, server, msg) 1905 struct proc *p; 1906 char *server, *msg; 1907 { 1908 tpr_t tpr; 1909 1910 if (p) 1911 tpr = tprintf_open(p); 1912 else 1913 tpr = NULL; 1914 tprintf(tpr, "nfs server %s: %s\n", server, msg); 1915 tprintf_close(tpr); 1916 return (0); 1917 } 1918 1919 #ifdef NFSSERVER 1920 int (*nfsrv3_procs[NFS_NPROCS]) __P((struct nfsrv_descript *, 1921 struct nfssvc_sock *, struct proc *, 1922 struct mbuf **)) = { 1923 nfsrv_null, 1924 nfsrv_getattr, 1925 nfsrv_setattr, 1926 nfsrv_lookup, 1927 nfsrv3_access, 1928 nfsrv_readlink, 1929 nfsrv_read, 1930 nfsrv_write, 1931 nfsrv_create, 1932 nfsrv_mkdir, 1933 nfsrv_symlink, 1934 nfsrv_mknod, 1935 nfsrv_remove, 1936 nfsrv_rmdir, 1937 nfsrv_rename, 1938 nfsrv_link, 1939 nfsrv_readdir, 1940 nfsrv_readdirplus, 1941 nfsrv_statfs, 1942 nfsrv_fsinfo, 1943 nfsrv_pathconf, 1944 nfsrv_commit, 1945 nqnfsrv_getlease, 1946 nqnfsrv_vacated, 1947 nfsrv_noop, 1948 nfsrv_noop 1949 }; 1950 1951 /* 1952 * Socket upcall routine for the nfsd sockets. 1953 * The caddr_t arg is a pointer to the "struct nfssvc_sock". 1954 * Essentially do as much as possible non-blocking, else punt and it will 1955 * be called with M_WAIT from an nfsd. 1956 */ 1957 void 1958 nfsrv_rcv(so, arg, waitflag) 1959 struct socket *so; 1960 caddr_t arg; 1961 int waitflag; 1962 { 1963 struct nfssvc_sock *slp = (struct nfssvc_sock *)arg; 1964 struct mbuf *m; 1965 struct mbuf *mp, *nam; 1966 struct uio auio; 1967 int flags, error; 1968 1969 if ((slp->ns_flag & SLP_VALID) == 0) 1970 return; 1971 #ifdef notdef 1972 /* 1973 * Define this to test for nfsds handling this under heavy load. 1974 */ 1975 if (waitflag == M_DONTWAIT) { 1976 slp->ns_flag |= SLP_NEEDQ; goto dorecs; 1977 } 1978 #endif 1979 auio.uio_procp = NULL; 1980 if (so->so_type == SOCK_STREAM) { 1981 /* 1982 * If there are already records on the queue, defer soreceive() 1983 * to an nfsd so that there is feedback to the TCP layer that 1984 * the nfs servers are heavily loaded. 1985 */ 1986 if (slp->ns_rec && waitflag == M_DONTWAIT) { 1987 slp->ns_flag |= SLP_NEEDQ; 1988 goto dorecs; 1989 } 1990 1991 /* 1992 * Do soreceive(). 1993 */ 1994 auio.uio_resid = 1000000000; 1995 flags = MSG_DONTWAIT; 1996 error = (*so->so_receive)(so, &nam, &auio, &mp, (struct mbuf **)0, &flags); 1997 if (error || mp == (struct mbuf *)0) { 1998 if (error == EWOULDBLOCK) 1999 slp->ns_flag |= SLP_NEEDQ; 2000 else 2001 slp->ns_flag |= SLP_DISCONN; 2002 goto dorecs; 2003 } 2004 m = mp; 2005 if (slp->ns_rawend) { 2006 slp->ns_rawend->m_next = m; 2007 slp->ns_cc += 1000000000 - auio.uio_resid; 2008 } else { 2009 slp->ns_raw = m; 2010 slp->ns_cc = 1000000000 - auio.uio_resid; 2011 } 2012 while (m->m_next) 2013 m = m->m_next; 2014 slp->ns_rawend = m; 2015 2016 /* 2017 * Now try and parse record(s) out of the raw stream data. 2018 */ 2019 error = nfsrv_getstream(slp, waitflag); 2020 if (error) { 2021 if (error == EPERM) 2022 slp->ns_flag |= SLP_DISCONN; 2023 else 2024 slp->ns_flag |= SLP_NEEDQ; 2025 } 2026 } else { 2027 do { 2028 auio.uio_resid = 1000000000; 2029 flags = MSG_DONTWAIT; 2030 error = (*so->so_receive)(so, &nam, &auio, &mp, 2031 (struct mbuf **)0, &flags); 2032 if (mp) { 2033 if (nam) { 2034 m = nam; 2035 m->m_next = mp; 2036 } else 2037 m = mp; 2038 if (slp->ns_recend) 2039 slp->ns_recend->m_nextpkt = m; 2040 else 2041 slp->ns_rec = m; 2042 slp->ns_recend = m; 2043 m->m_nextpkt = (struct mbuf *)0; 2044 } 2045 if (error) { 2046 if ((so->so_proto->pr_flags & PR_CONNREQUIRED) 2047 && error != EWOULDBLOCK) { 2048 slp->ns_flag |= SLP_DISCONN; 2049 goto dorecs; 2050 } 2051 } 2052 } while (mp); 2053 } 2054 2055 /* 2056 * Now try and process the request records, non-blocking. 2057 */ 2058 dorecs: 2059 if (waitflag == M_DONTWAIT && 2060 (slp->ns_rec || (slp->ns_flag & (SLP_NEEDQ | SLP_DISCONN)))) 2061 nfsrv_wakenfsd(slp); 2062 } 2063 2064 /* 2065 * Try and extract an RPC request from the mbuf data list received on a 2066 * stream socket. The "waitflag" argument indicates whether or not it 2067 * can sleep. 2068 */ 2069 int 2070 nfsrv_getstream(slp, waitflag) 2071 struct nfssvc_sock *slp; 2072 int waitflag; 2073 { 2074 struct mbuf *m, **mpp; 2075 struct mbuf *recm; 2076 u_int32_t recmark; 2077 2078 if (slp->ns_flag & SLP_GETSTREAM) 2079 panic("nfs getstream"); 2080 slp->ns_flag |= SLP_GETSTREAM; 2081 for (;;) { 2082 if (slp->ns_reclen == 0) { 2083 if (slp->ns_cc < NFSX_UNSIGNED) { 2084 slp->ns_flag &= ~SLP_GETSTREAM; 2085 return (0); 2086 } 2087 m = slp->ns_raw; 2088 m_copydata(m, 0, NFSX_UNSIGNED, (caddr_t)&recmark); 2089 m_adj(m, NFSX_UNSIGNED); 2090 slp->ns_cc -= NFSX_UNSIGNED; 2091 recmark = ntohl(recmark); 2092 slp->ns_reclen = recmark & ~0x80000000; 2093 if (recmark & 0x80000000) 2094 slp->ns_flag |= SLP_LASTFRAG; 2095 else 2096 slp->ns_flag &= ~SLP_LASTFRAG; 2097 if (slp->ns_reclen > NFS_MAXPACKET) { 2098 slp->ns_flag &= ~SLP_GETSTREAM; 2099 return (EPERM); 2100 } 2101 } 2102 2103 /* 2104 * Now get the record part. 2105 * 2106 * Note that slp->ns_reclen may be 0. Linux sometimes 2107 * generates 0-length records. 2108 */ 2109 if (slp->ns_cc == slp->ns_reclen) { 2110 recm = slp->ns_raw; 2111 slp->ns_raw = slp->ns_rawend = (struct mbuf *)0; 2112 slp->ns_cc = slp->ns_reclen = 0; 2113 } else if (slp->ns_cc > slp->ns_reclen) { 2114 recm = slp->ns_raw; 2115 m = m_split(recm, slp->ns_reclen, waitflag); 2116 if (m == NULL) { 2117 slp->ns_flag &= ~SLP_GETSTREAM; 2118 return (EWOULDBLOCK); 2119 } 2120 m_claim(recm, &nfs_mowner); 2121 slp->ns_raw = m; 2122 if (m->m_next == NULL) 2123 slp->ns_rawend = m; 2124 slp->ns_cc -= slp->ns_reclen; 2125 slp->ns_reclen = 0; 2126 } else { 2127 slp->ns_flag &= ~SLP_GETSTREAM; 2128 return (0); 2129 } 2130 2131 /* 2132 * Accumulate the fragments into a record. 2133 */ 2134 mpp = &slp->ns_frag; 2135 while (*mpp) 2136 mpp = &((*mpp)->m_next); 2137 *mpp = recm; 2138 if (slp->ns_flag & SLP_LASTFRAG) { 2139 if (slp->ns_recend) 2140 slp->ns_recend->m_nextpkt = slp->ns_frag; 2141 else 2142 slp->ns_rec = slp->ns_frag; 2143 slp->ns_recend = slp->ns_frag; 2144 slp->ns_frag = (struct mbuf *)0; 2145 } 2146 } 2147 } 2148 2149 /* 2150 * Parse an RPC header. 2151 */ 2152 int 2153 nfsrv_dorec(slp, nfsd, ndp) 2154 struct nfssvc_sock *slp; 2155 struct nfsd *nfsd; 2156 struct nfsrv_descript **ndp; 2157 { 2158 struct mbuf *m, *nam; 2159 struct nfsrv_descript *nd; 2160 int error; 2161 2162 *ndp = NULL; 2163 if ((slp->ns_flag & SLP_VALID) == 0 || 2164 (m = slp->ns_rec) == (struct mbuf *)0) 2165 return (ENOBUFS); 2166 slp->ns_rec = m->m_nextpkt; 2167 if (slp->ns_rec) 2168 m->m_nextpkt = (struct mbuf *)0; 2169 else 2170 slp->ns_recend = (struct mbuf *)0; 2171 if (m->m_type == MT_SONAME) { 2172 nam = m; 2173 m = m->m_next; 2174 nam->m_next = NULL; 2175 } else 2176 nam = NULL; 2177 nd = pool_get(&nfs_srvdesc_pool, PR_WAITOK); 2178 nd->nd_md = nd->nd_mrep = m; 2179 nd->nd_nam2 = nam; 2180 nd->nd_dpos = mtod(m, caddr_t); 2181 error = nfs_getreq(nd, nfsd, TRUE); 2182 if (error) { 2183 m_freem(nam); 2184 pool_put(&nfs_srvdesc_pool, nd); 2185 return (error); 2186 } 2187 *ndp = nd; 2188 nfsd->nfsd_nd = nd; 2189 return (0); 2190 } 2191 2192 2193 /* 2194 * Search for a sleeping nfsd and wake it up. 2195 * SIDE EFFECT: If none found, set NFSD_CHECKSLP flag, so that one of the 2196 * running nfsds will go look for the work in the nfssvc_sock list. 2197 */ 2198 void 2199 nfsrv_wakenfsd(slp) 2200 struct nfssvc_sock *slp; 2201 { 2202 struct nfsd *nd; 2203 2204 if ((slp->ns_flag & SLP_VALID) == 0) 2205 return; 2206 TAILQ_FOREACH(nd, &nfsd_head, nfsd_chain) { 2207 if (nd->nfsd_flag & NFSD_WAITING) { 2208 nd->nfsd_flag &= ~NFSD_WAITING; 2209 if (nd->nfsd_slp) 2210 panic("nfsd wakeup"); 2211 slp->ns_sref++; 2212 nd->nfsd_slp = slp; 2213 wakeup((caddr_t)nd); 2214 return; 2215 } 2216 } 2217 slp->ns_flag |= SLP_DOREC; 2218 nfsd_head_flag |= NFSD_CHECKSLP; 2219 } 2220 #endif /* NFSSERVER */ 2221