1 /* 2 * Copyright (c) 1989, 1991 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Rick Macklem at The University of Guelph. 7 * 8 * %sccs.include.redist.c% 9 * 10 * @(#)nfs_socket.c 7.41 (Berkeley) 11/03/92 11 */ 12 13 /* 14 * Socket operations for use by nfs 15 */ 16 17 #include <sys/param.h> 18 #include <sys/systm.h> 19 #include <sys/proc.h> 20 #include <sys/mount.h> 21 #include <sys/kernel.h> 22 #include <sys/mbuf.h> 23 #include <sys/vnode.h> 24 #include <sys/domain.h> 25 #include <sys/protosw.h> 26 #include <sys/socket.h> 27 #include <sys/socketvar.h> 28 #include <sys/syslog.h> 29 #include <sys/tprintf.h> 30 31 #include <netinet/in.h> 32 #include <netinet/tcp.h> 33 #include <nfs/rpcv2.h> 34 #include <nfs/nfsv2.h> 35 #include <nfs/nfs.h> 36 #include <nfs/xdr_subs.h> 37 #include <nfs/nfsm_subs.h> 38 #include <nfs/nfsmount.h> 39 #include <nfs/nfsnode.h> 40 #include <nfs/nfsrtt.h> 41 #include <nfs/nqnfs.h> 42 43 #define TRUE 1 44 #define FALSE 0 45 46 /* 47 * Estimate rto for an nfs rpc sent via. an unreliable datagram. 48 * Use the mean and mean deviation of rtt for the appropriate type of rpc 49 * for the frequent rpcs and a default for the others. 50 * The justification for doing "other" this way is that these rpcs 51 * happen so infrequently that timer est. would probably be stale. 52 * Also, since many of these rpcs are 53 * non-idempotent, a conservative timeout is desired. 54 * getattr, lookup - A+2D 55 * read, write - A+4D 56 * other - nm_timeo 57 */ 58 #define NFS_RTO(n, t) \ 59 ((t) == 0 ? (n)->nm_timeo : \ 60 ((t) < 3 ? \ 61 (((((n)->nm_srtt[t-1] + 3) >> 2) + (n)->nm_sdrtt[t-1] + 1) >> 1) : \ 62 ((((n)->nm_srtt[t-1] + 7) >> 3) + (n)->nm_sdrtt[t-1] + 1))) 63 #define NFS_SRTT(r) (r)->r_nmp->nm_srtt[proct[(r)->r_procnum] - 1] 64 #define NFS_SDRTT(r) (r)->r_nmp->nm_sdrtt[proct[(r)->r_procnum] - 1] 65 /* 66 * External data, mostly RPC constants in XDR form 67 */ 68 extern u_long rpc_reply, rpc_msgdenied, rpc_mismatch, rpc_vers, rpc_auth_unix, 69 rpc_msgaccepted, rpc_call, rpc_autherr, rpc_rejectedcred, 70 rpc_auth_kerb; 71 extern u_long nfs_prog, nfs_vers, nqnfs_prog, nqnfs_vers; 72 extern time_t nqnfsstarttime; 73 extern int nonidempotent[NFS_NPROCS]; 74 75 /* 76 * Maps errno values to nfs error numbers. 77 * Use NFSERR_IO as the catch all for ones not specifically defined in 78 * RFC 1094. 79 */ 80 static int nfsrv_errmap[ELAST] = { 81 NFSERR_PERM, NFSERR_NOENT, NFSERR_IO, NFSERR_IO, NFSERR_IO, 82 NFSERR_NXIO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 83 NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_IO, NFSERR_IO, 84 NFSERR_IO, NFSERR_EXIST, NFSERR_IO, NFSERR_NODEV, NFSERR_NOTDIR, 85 NFSERR_ISDIR, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 86 NFSERR_IO, NFSERR_FBIG, NFSERR_NOSPC, NFSERR_IO, NFSERR_ROFS, 87 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 88 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 89 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 90 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 91 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 92 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 93 NFSERR_IO, NFSERR_IO, NFSERR_NAMETOL, NFSERR_IO, NFSERR_IO, 94 NFSERR_NOTEMPTY, NFSERR_IO, NFSERR_IO, NFSERR_DQUOT, NFSERR_STALE, 95 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 96 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 97 NFSERR_IO, 98 }; 99 100 /* 101 * Defines which timer to use for the procnum. 102 * 0 - default 103 * 1 - getattr 104 * 2 - lookup 105 * 3 - read 106 * 4 - write 107 */ 108 static int proct[NFS_NPROCS] = { 109 0, 1, 0, 0, 2, 3, 3, 0, 4, 0, 0, 0, 0, 0, 0, 0, 3, 0, 3, 0, 0, 0, 0, 110 }; 111 112 /* 113 * There is a congestion window for outstanding rpcs maintained per mount 114 * point. The cwnd size is adjusted in roughly the way that: 115 * Van Jacobson, Congestion avoidance and Control, In "Proceedings of 116 * SIGCOMM '88". ACM, August 1988. 117 * describes for TCP. The cwnd size is chopped in half on a retransmit timeout 118 * and incremented by 1/cwnd when each rpc reply is received and a full cwnd 119 * of rpcs is in progress. 120 * (The sent count and cwnd are scaled for integer arith.) 121 * Variants of "slow start" were tried and were found to be too much of a 122 * performance hit (ave. rtt 3 times larger), 123 * I suspect due to the large rtt that nfs rpcs have. 124 */ 125 #define NFS_CWNDSCALE 256 126 #define NFS_MAXCWND (NFS_CWNDSCALE * 32) 127 static int nfs_backoff[8] = { 2, 4, 8, 16, 32, 64, 128, 256, }; 128 int nfs_sbwait(); 129 void nfs_disconnect(), nfs_realign(), nfsrv_wakenfsd(), nfs_sndunlock(); 130 void nfs_rcvunlock(), nqnfs_serverd(), nqnfs_clientlease(); 131 struct mbuf *nfsm_rpchead(); 132 int nfsrtton = 0; 133 struct nfsrtt nfsrtt; 134 struct nfsd nfsd_head; 135 136 int nfsrv_null(), 137 nfsrv_getattr(), 138 nfsrv_setattr(), 139 nfsrv_lookup(), 140 nfsrv_readlink(), 141 nfsrv_read(), 142 nfsrv_write(), 143 nfsrv_create(), 144 nfsrv_remove(), 145 nfsrv_rename(), 146 nfsrv_link(), 147 nfsrv_symlink(), 148 nfsrv_mkdir(), 149 nfsrv_rmdir(), 150 nfsrv_readdir(), 151 nfsrv_statfs(), 152 nfsrv_noop(), 153 nqnfsrv_readdirlook(), 154 nqnfsrv_getlease(), 155 nqnfsrv_vacated(), 156 nqnfsrv_access(); 157 158 int (*nfsrv_procs[NFS_NPROCS])() = { 159 nfsrv_null, 160 nfsrv_getattr, 161 nfsrv_setattr, 162 nfsrv_noop, 163 nfsrv_lookup, 164 nfsrv_readlink, 165 nfsrv_read, 166 nfsrv_noop, 167 nfsrv_write, 168 nfsrv_create, 169 nfsrv_remove, 170 nfsrv_rename, 171 nfsrv_link, 172 nfsrv_symlink, 173 nfsrv_mkdir, 174 nfsrv_rmdir, 175 nfsrv_readdir, 176 nfsrv_statfs, 177 nqnfsrv_readdirlook, 178 nqnfsrv_getlease, 179 nqnfsrv_vacated, 180 nfsrv_noop, 181 nqnfsrv_access, 182 }; 183 184 struct nfsreq nfsreqh; 185 186 /* 187 * Initialize sockets and congestion for a new NFS connection. 188 * We do not free the sockaddr if error. 189 */ 190 nfs_connect(nmp, rep) 191 register struct nfsmount *nmp; 192 struct nfsreq *rep; 193 { 194 register struct socket *so; 195 int s, error, rcvreserve, sndreserve; 196 struct sockaddr *saddr; 197 struct sockaddr_in *sin; 198 struct mbuf *m; 199 u_short tport; 200 201 nmp->nm_so = (struct socket *)0; 202 saddr = mtod(nmp->nm_nam, struct sockaddr *); 203 if (error = socreate(saddr->sa_family, 204 &nmp->nm_so, nmp->nm_sotype, nmp->nm_soproto)) 205 goto bad; 206 so = nmp->nm_so; 207 nmp->nm_soflags = so->so_proto->pr_flags; 208 209 /* 210 * Some servers require that the client port be a reserved port number. 211 */ 212 if (saddr->sa_family == AF_INET && (nmp->nm_flag & NFSMNT_RESVPORT)) { 213 MGET(m, M_WAIT, MT_SONAME); 214 sin = mtod(m, struct sockaddr_in *); 215 sin->sin_len = m->m_len = sizeof (struct sockaddr_in); 216 sin->sin_family = AF_INET; 217 sin->sin_addr.s_addr = INADDR_ANY; 218 tport = IPPORT_RESERVED - 1; 219 sin->sin_port = htons(tport); 220 while ((error = sobind(so, m)) == EADDRINUSE && 221 --tport > IPPORT_RESERVED / 2) 222 sin->sin_port = htons(tport); 223 m_freem(m); 224 if (error) 225 goto bad; 226 } 227 228 /* 229 * Protocols that do not require connections may be optionally left 230 * unconnected for servers that reply from a port other than NFS_PORT. 231 */ 232 if (nmp->nm_flag & NFSMNT_NOCONN) { 233 if (nmp->nm_soflags & PR_CONNREQUIRED) { 234 error = ENOTCONN; 235 goto bad; 236 } 237 } else { 238 if (error = soconnect(so, nmp->nm_nam)) 239 goto bad; 240 241 /* 242 * Wait for the connection to complete. Cribbed from the 243 * connect system call but with the wait timing out so 244 * that interruptible mounts don't hang here for a long time. 245 */ 246 s = splnet(); 247 while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) { 248 (void) tsleep((caddr_t)&so->so_timeo, PSOCK, 249 "nfscon", 2 * hz); 250 if ((so->so_state & SS_ISCONNECTING) && 251 so->so_error == 0 && rep && 252 (error = nfs_sigintr(nmp, rep, rep->r_procp))) { 253 so->so_state &= ~SS_ISCONNECTING; 254 splx(s); 255 goto bad; 256 } 257 } 258 if (so->so_error) { 259 error = so->so_error; 260 so->so_error = 0; 261 splx(s); 262 goto bad; 263 } 264 splx(s); 265 } 266 if (nmp->nm_flag & (NFSMNT_SOFT | NFSMNT_INT)) { 267 so->so_rcv.sb_timeo = (5 * hz); 268 so->so_snd.sb_timeo = (5 * hz); 269 } else { 270 so->so_rcv.sb_timeo = 0; 271 so->so_snd.sb_timeo = 0; 272 } 273 if (nmp->nm_sotype == SOCK_DGRAM) { 274 sndreserve = nmp->nm_wsize + NFS_MAXPKTHDR; 275 rcvreserve = nmp->nm_rsize + NFS_MAXPKTHDR; 276 } else if (nmp->nm_sotype == SOCK_SEQPACKET) { 277 sndreserve = (nmp->nm_wsize + NFS_MAXPKTHDR) * 2; 278 rcvreserve = (nmp->nm_rsize + NFS_MAXPKTHDR) * 2; 279 } else { 280 if (nmp->nm_sotype != SOCK_STREAM) 281 panic("nfscon sotype"); 282 if (so->so_proto->pr_flags & PR_CONNREQUIRED) { 283 MGET(m, M_WAIT, MT_SOOPTS); 284 *mtod(m, int *) = 1; 285 m->m_len = sizeof(int); 286 sosetopt(so, SOL_SOCKET, SO_KEEPALIVE, m); 287 } 288 if (so->so_proto->pr_protocol == IPPROTO_TCP) { 289 MGET(m, M_WAIT, MT_SOOPTS); 290 *mtod(m, int *) = 1; 291 m->m_len = sizeof(int); 292 sosetopt(so, IPPROTO_TCP, TCP_NODELAY, m); 293 } 294 sndreserve = (nmp->nm_wsize + NFS_MAXPKTHDR + sizeof (u_long)) 295 * 2; 296 rcvreserve = (nmp->nm_rsize + NFS_MAXPKTHDR + sizeof (u_long)) 297 * 2; 298 } 299 if (error = soreserve(so, sndreserve, rcvreserve)) 300 goto bad; 301 so->so_rcv.sb_flags |= SB_NOINTR; 302 so->so_snd.sb_flags |= SB_NOINTR; 303 304 /* Initialize other non-zero congestion variables */ 305 nmp->nm_srtt[0] = nmp->nm_srtt[1] = nmp->nm_srtt[2] = nmp->nm_srtt[3] = 306 nmp->nm_srtt[4] = (NFS_TIMEO << 3); 307 nmp->nm_sdrtt[0] = nmp->nm_sdrtt[1] = nmp->nm_sdrtt[2] = 308 nmp->nm_sdrtt[3] = nmp->nm_sdrtt[4] = 0; 309 nmp->nm_cwnd = NFS_MAXCWND / 2; /* Initial send window */ 310 nmp->nm_sent = 0; 311 nmp->nm_timeouts = 0; 312 return (0); 313 314 bad: 315 nfs_disconnect(nmp); 316 return (error); 317 } 318 319 /* 320 * Reconnect routine: 321 * Called when a connection is broken on a reliable protocol. 322 * - clean up the old socket 323 * - nfs_connect() again 324 * - set R_MUSTRESEND for all outstanding requests on mount point 325 * If this fails the mount point is DEAD! 326 * nb: Must be called with the nfs_sndlock() set on the mount point. 327 */ 328 nfs_reconnect(rep) 329 register struct nfsreq *rep; 330 { 331 register struct nfsreq *rp; 332 register struct nfsmount *nmp = rep->r_nmp; 333 int error; 334 335 nfs_disconnect(nmp); 336 while (error = nfs_connect(nmp, rep)) { 337 if (error == EINTR || error == ERESTART) 338 return (EINTR); 339 (void) tsleep((caddr_t)&lbolt, PSOCK, "nfscon", 0); 340 } 341 342 /* 343 * Loop through outstanding request list and fix up all requests 344 * on old socket. 345 */ 346 rp = nfsreqh.r_next; 347 while (rp != &nfsreqh) { 348 if (rp->r_nmp == nmp) 349 rp->r_flags |= R_MUSTRESEND; 350 rp = rp->r_next; 351 } 352 return (0); 353 } 354 355 /* 356 * NFS disconnect. Clean up and unlink. 357 */ 358 void 359 nfs_disconnect(nmp) 360 register struct nfsmount *nmp; 361 { 362 register struct socket *so; 363 364 if (nmp->nm_so) { 365 so = nmp->nm_so; 366 nmp->nm_so = (struct socket *)0; 367 soshutdown(so, 2); 368 soclose(so); 369 } 370 } 371 372 /* 373 * This is the nfs send routine. For connection based socket types, it 374 * must be called with an nfs_sndlock() on the socket. 375 * "rep == NULL" indicates that it has been called from a server. 376 * For the client side: 377 * - return EINTR if the RPC is terminated, 0 otherwise 378 * - set R_MUSTRESEND if the send fails for any reason 379 * - do any cleanup required by recoverable socket errors (???) 380 * For the server side: 381 * - return EINTR or ERESTART if interrupted by a signal 382 * - return EPIPE if a connection is lost for connection based sockets (TCP...) 383 * - do any cleanup required by recoverable socket errors (???) 384 */ 385 nfs_send(so, nam, top, rep) 386 register struct socket *so; 387 struct mbuf *nam; 388 register struct mbuf *top; 389 struct nfsreq *rep; 390 { 391 struct mbuf *sendnam; 392 int error, soflags, flags; 393 394 if (rep) { 395 if (rep->r_flags & R_SOFTTERM) { 396 m_freem(top); 397 return (EINTR); 398 } 399 if ((so = rep->r_nmp->nm_so) == NULL) { 400 rep->r_flags |= R_MUSTRESEND; 401 m_freem(top); 402 return (0); 403 } 404 rep->r_flags &= ~R_MUSTRESEND; 405 soflags = rep->r_nmp->nm_soflags; 406 } else 407 soflags = so->so_proto->pr_flags; 408 if ((soflags & PR_CONNREQUIRED) || (so->so_state & SS_ISCONNECTED)) 409 sendnam = (struct mbuf *)0; 410 else 411 sendnam = nam; 412 if (so->so_type == SOCK_SEQPACKET) 413 flags = MSG_EOR; 414 else 415 flags = 0; 416 417 error = sosend(so, sendnam, (struct uio *)0, top, 418 (struct mbuf *)0, flags); 419 if (error) { 420 if (rep) { 421 log(LOG_INFO, "nfs send error %d for server %s\n",error, 422 rep->r_nmp->nm_mountp->mnt_stat.f_mntfromname); 423 /* 424 * Deal with errors for the client side. 425 */ 426 if (rep->r_flags & R_SOFTTERM) 427 error = EINTR; 428 else 429 rep->r_flags |= R_MUSTRESEND; 430 } else 431 log(LOG_INFO, "nfsd send error %d\n", error); 432 433 /* 434 * Handle any recoverable (soft) socket errors here. (???) 435 */ 436 if (error != EINTR && error != ERESTART && 437 error != EWOULDBLOCK && error != EPIPE) 438 error = 0; 439 } 440 return (error); 441 } 442 443 /* 444 * Receive a Sun RPC Request/Reply. For SOCK_DGRAM, the work is all 445 * done by soreceive(), but for SOCK_STREAM we must deal with the Record 446 * Mark and consolidate the data into a new mbuf list. 447 * nb: Sometimes TCP passes the data up to soreceive() in long lists of 448 * small mbufs. 449 * For SOCK_STREAM we must be very careful to read an entire record once 450 * we have read any of it, even if the system call has been interrupted. 451 */ 452 nfs_receive(rep, aname, mp) 453 register struct nfsreq *rep; 454 struct mbuf **aname; 455 struct mbuf **mp; 456 { 457 register struct socket *so; 458 struct uio auio; 459 struct iovec aio; 460 register struct mbuf *m; 461 struct mbuf *control; 462 u_long len; 463 struct mbuf **getnam; 464 int error, sotype, rcvflg; 465 struct proc *p = curproc; /* XXX */ 466 467 /* 468 * Set up arguments for soreceive() 469 */ 470 *mp = (struct mbuf *)0; 471 *aname = (struct mbuf *)0; 472 sotype = rep->r_nmp->nm_sotype; 473 474 /* 475 * For reliable protocols, lock against other senders/receivers 476 * in case a reconnect is necessary. 477 * For SOCK_STREAM, first get the Record Mark to find out how much 478 * more there is to get. 479 * We must lock the socket against other receivers 480 * until we have an entire rpc request/reply. 481 */ 482 if (sotype != SOCK_DGRAM) { 483 if (error = nfs_sndlock(&rep->r_nmp->nm_flag, rep)) 484 return (error); 485 tryagain: 486 /* 487 * Check for fatal errors and resending request. 488 */ 489 /* 490 * Ugh: If a reconnect attempt just happened, nm_so 491 * would have changed. NULL indicates a failed 492 * attempt that has essentially shut down this 493 * mount point. 494 */ 495 if (rep->r_mrep || (rep->r_flags & R_SOFTTERM)) { 496 nfs_sndunlock(&rep->r_nmp->nm_flag); 497 return (EINTR); 498 } 499 if ((so = rep->r_nmp->nm_so) == NULL) { 500 if (error = nfs_reconnect(rep)) { 501 nfs_sndunlock(&rep->r_nmp->nm_flag); 502 return (error); 503 } 504 goto tryagain; 505 } 506 while (rep->r_flags & R_MUSTRESEND) { 507 m = m_copym(rep->r_mreq, 0, M_COPYALL, M_WAIT); 508 nfsstats.rpcretries++; 509 if (error = nfs_send(so, rep->r_nmp->nm_nam, m, rep)) { 510 if (error == EINTR || error == ERESTART || 511 (error = nfs_reconnect(rep))) { 512 nfs_sndunlock(&rep->r_nmp->nm_flag); 513 return (error); 514 } 515 goto tryagain; 516 } 517 } 518 nfs_sndunlock(&rep->r_nmp->nm_flag); 519 if (sotype == SOCK_STREAM) { 520 aio.iov_base = (caddr_t) &len; 521 aio.iov_len = sizeof(u_long); 522 auio.uio_iov = &aio; 523 auio.uio_iovcnt = 1; 524 auio.uio_segflg = UIO_SYSSPACE; 525 auio.uio_rw = UIO_READ; 526 auio.uio_offset = 0; 527 auio.uio_resid = sizeof(u_long); 528 auio.uio_procp = p; 529 do { 530 rcvflg = MSG_WAITALL; 531 error = soreceive(so, (struct mbuf **)0, &auio, 532 (struct mbuf **)0, (struct mbuf **)0, &rcvflg); 533 if (error == EWOULDBLOCK && rep) { 534 if (rep->r_flags & R_SOFTTERM) 535 return (EINTR); 536 } 537 } while (error == EWOULDBLOCK); 538 if (!error && auio.uio_resid > 0) { 539 log(LOG_INFO, 540 "short receive (%d/%d) from nfs server %s\n", 541 sizeof(u_long) - auio.uio_resid, 542 sizeof(u_long), 543 rep->r_nmp->nm_mountp->mnt_stat.f_mntfromname); 544 error = EPIPE; 545 } 546 if (error) 547 goto errout; 548 len = ntohl(len) & ~0x80000000; 549 /* 550 * This is SERIOUS! We are out of sync with the sender 551 * and forcing a disconnect/reconnect is all I can do. 552 */ 553 if (len > NFS_MAXPACKET) { 554 log(LOG_ERR, "%s (%d) from nfs server %s\n", 555 "impossible packet length", 556 len, 557 rep->r_nmp->nm_mountp->mnt_stat.f_mntfromname); 558 error = EFBIG; 559 goto errout; 560 } 561 auio.uio_resid = len; 562 do { 563 rcvflg = MSG_WAITALL; 564 error = soreceive(so, (struct mbuf **)0, 565 &auio, mp, (struct mbuf **)0, &rcvflg); 566 } while (error == EWOULDBLOCK || error == EINTR || 567 error == ERESTART); 568 if (!error && auio.uio_resid > 0) { 569 log(LOG_INFO, 570 "short receive (%d/%d) from nfs server %s\n", 571 len - auio.uio_resid, len, 572 rep->r_nmp->nm_mountp->mnt_stat.f_mntfromname); 573 error = EPIPE; 574 } 575 } else { 576 /* 577 * NB: Since uio_resid is big, MSG_WAITALL is ignored 578 * and soreceive() will return when it has either a 579 * control msg or a data msg. 580 * We have no use for control msg., but must grab them 581 * and then throw them away so we know what is going 582 * on. 583 */ 584 auio.uio_resid = len = 100000000; /* Anything Big */ 585 auio.uio_procp = p; 586 do { 587 rcvflg = 0; 588 error = soreceive(so, (struct mbuf **)0, 589 &auio, mp, &control, &rcvflg); 590 if (control) 591 m_freem(control); 592 if (error == EWOULDBLOCK && rep) { 593 if (rep->r_flags & R_SOFTTERM) 594 return (EINTR); 595 } 596 } while (error == EWOULDBLOCK || 597 (!error && *mp == NULL && control)); 598 if ((rcvflg & MSG_EOR) == 0) 599 printf("Egad!!\n"); 600 if (!error && *mp == NULL) 601 error = EPIPE; 602 len -= auio.uio_resid; 603 } 604 errout: 605 if (error && error != EINTR && error != ERESTART) { 606 m_freem(*mp); 607 *mp = (struct mbuf *)0; 608 if (error != EPIPE) 609 log(LOG_INFO, 610 "receive error %d from nfs server %s\n", 611 error, 612 rep->r_nmp->nm_mountp->mnt_stat.f_mntfromname); 613 error = nfs_sndlock(&rep->r_nmp->nm_flag, rep); 614 if (!error) 615 error = nfs_reconnect(rep); 616 if (!error) 617 goto tryagain; 618 } 619 } else { 620 if ((so = rep->r_nmp->nm_so) == NULL) 621 return (EACCES); 622 if (so->so_state & SS_ISCONNECTED) 623 getnam = (struct mbuf **)0; 624 else 625 getnam = aname; 626 auio.uio_resid = len = 1000000; 627 auio.uio_procp = p; 628 do { 629 rcvflg = 0; 630 error = soreceive(so, getnam, &auio, mp, 631 (struct mbuf **)0, &rcvflg); 632 if (error == EWOULDBLOCK && 633 (rep->r_flags & R_SOFTTERM)) 634 return (EINTR); 635 } while (error == EWOULDBLOCK); 636 len -= auio.uio_resid; 637 } 638 if (error) { 639 m_freem(*mp); 640 *mp = (struct mbuf *)0; 641 } 642 /* 643 * Search for any mbufs that are not a multiple of 4 bytes long 644 * or with m_data not longword aligned. 645 * These could cause pointer alignment problems, so copy them to 646 * well aligned mbufs. 647 */ 648 nfs_realign(*mp, 5 * NFSX_UNSIGNED); 649 return (error); 650 } 651 652 /* 653 * Implement receipt of reply on a socket. 654 * We must search through the list of received datagrams matching them 655 * with outstanding requests using the xid, until ours is found. 656 */ 657 /* ARGSUSED */ 658 nfs_reply(myrep) 659 struct nfsreq *myrep; 660 { 661 register struct nfsreq *rep; 662 register struct nfsmount *nmp = myrep->r_nmp; 663 register long t1; 664 struct mbuf *mrep, *nam, *md; 665 u_long rxid, *tl; 666 caddr_t dpos, cp2; 667 int error; 668 669 /* 670 * Loop around until we get our own reply 671 */ 672 for (;;) { 673 /* 674 * Lock against other receivers so that I don't get stuck in 675 * sbwait() after someone else has received my reply for me. 676 * Also necessary for connection based protocols to avoid 677 * race conditions during a reconnect. 678 */ 679 if (error = nfs_rcvlock(myrep)) 680 return (error); 681 /* Already received, bye bye */ 682 if (myrep->r_mrep != NULL) { 683 nfs_rcvunlock(&nmp->nm_flag); 684 return (0); 685 } 686 /* 687 * Get the next Rpc reply off the socket 688 */ 689 error = nfs_receive(myrep, &nam, &mrep); 690 nfs_rcvunlock(&nmp->nm_flag); 691 if (error) printf("rcv err=%d\n",error); 692 if (error) { 693 694 /* 695 * Ignore routing errors on connectionless protocols?? 696 */ 697 if (NFSIGNORE_SOERROR(nmp->nm_soflags, error)) { 698 nmp->nm_so->so_error = 0; 699 continue; 700 } 701 return (error); 702 } 703 if (nam) 704 m_freem(nam); 705 706 /* 707 * Get the xid and check that it is an rpc reply 708 */ 709 md = mrep; 710 dpos = mtod(md, caddr_t); 711 nfsm_dissect(tl, u_long *, 2*NFSX_UNSIGNED); 712 rxid = *tl++; 713 if (*tl != rpc_reply) { 714 if (nmp->nm_flag & NFSMNT_NQNFS) { 715 if (nqnfs_callback(nmp, mrep, md, dpos)) 716 nfsstats.rpcinvalid++; 717 } else { 718 nfsstats.rpcinvalid++; 719 m_freem(mrep); 720 } 721 nfsmout: 722 continue; 723 } 724 725 /* 726 * Loop through the request list to match up the reply 727 * Iff no match, just drop the datagram 728 */ 729 rep = nfsreqh.r_next; 730 while (rep != &nfsreqh) { 731 if (rep->r_mrep == NULL && rxid == rep->r_xid) { 732 /* Found it.. */ 733 rep->r_mrep = mrep; 734 rep->r_md = md; 735 rep->r_dpos = dpos; 736 if (nfsrtton) { 737 struct rttl *rt; 738 739 rt = &nfsrtt.rttl[nfsrtt.pos]; 740 rt->proc = rep->r_procnum; 741 rt->rto = NFS_RTO(nmp, proct[rep->r_procnum]); 742 rt->sent = nmp->nm_sent; 743 rt->cwnd = nmp->nm_cwnd; 744 rt->srtt = nmp->nm_srtt[proct[rep->r_procnum] - 1]; 745 rt->sdrtt = nmp->nm_sdrtt[proct[rep->r_procnum] - 1]; 746 rt->fsid = nmp->nm_mountp->mnt_stat.f_fsid; 747 rt->tstamp = time; 748 if (rep->r_flags & R_TIMING) 749 rt->rtt = rep->r_rtt; 750 else 751 rt->rtt = 1000000; 752 nfsrtt.pos = (nfsrtt.pos + 1) % NFSRTTLOGSIZ; 753 } 754 /* 755 * Update congestion window. 756 * Do the additive increase of 757 * one rpc/rtt. 758 */ 759 if (nmp->nm_cwnd <= nmp->nm_sent) { 760 nmp->nm_cwnd += 761 (NFS_CWNDSCALE * NFS_CWNDSCALE + 762 (nmp->nm_cwnd >> 1)) / nmp->nm_cwnd; 763 if (nmp->nm_cwnd > NFS_MAXCWND) 764 nmp->nm_cwnd = NFS_MAXCWND; 765 } 766 rep->r_flags &= ~R_SENT; 767 nmp->nm_sent -= NFS_CWNDSCALE; 768 /* 769 * Update rtt using a gain of 0.125 on the mean 770 * and a gain of 0.25 on the deviation. 771 */ 772 if (rep->r_flags & R_TIMING) { 773 /* 774 * Since the timer resolution of 775 * NFS_HZ is so course, it can often 776 * result in r_rtt == 0. Since 777 * r_rtt == N means that the actual 778 * rtt is between N+dt and N+2-dt ticks, 779 * add 1. 780 */ 781 t1 = rep->r_rtt + 1; 782 t1 -= (NFS_SRTT(rep) >> 3); 783 NFS_SRTT(rep) += t1; 784 if (t1 < 0) 785 t1 = -t1; 786 t1 -= (NFS_SDRTT(rep) >> 2); 787 NFS_SDRTT(rep) += t1; 788 } 789 nmp->nm_timeouts = 0; 790 break; 791 } 792 rep = rep->r_next; 793 } 794 /* 795 * If not matched to a request, drop it. 796 * If it's mine, get out. 797 */ 798 if (rep == &nfsreqh) { 799 nfsstats.rpcunexpected++; 800 m_freem(mrep); 801 } else if (rep == myrep) { 802 if (rep->r_mrep == NULL) 803 panic("nfsreply nil"); 804 return (0); 805 } 806 } 807 } 808 809 /* 810 * nfs_request - goes something like this 811 * - fill in request struct 812 * - links it into list 813 * - calls nfs_send() for first transmit 814 * - calls nfs_receive() to get reply 815 * - break down rpc header and return with nfs reply pointed to 816 * by mrep or error 817 * nb: always frees up mreq mbuf list 818 */ 819 nfs_request(vp, mrest, procnum, procp, cred, mrp, mdp, dposp) 820 struct vnode *vp; 821 struct mbuf *mrest; 822 int procnum; 823 struct proc *procp; 824 struct ucred *cred; 825 struct mbuf **mrp; 826 struct mbuf **mdp; 827 caddr_t *dposp; 828 { 829 register struct mbuf *m, *mrep; 830 register struct nfsreq *rep; 831 register u_long *tl; 832 register int i; 833 struct nfsmount *nmp; 834 struct mbuf *md, *mheadend; 835 struct nfsreq *reph; 836 struct nfsnode *tp, *np; 837 time_t reqtime, waituntil; 838 caddr_t dpos, cp2; 839 int t1, nqlflag, cachable, s, error = 0, mrest_len, auth_len, auth_type; 840 int trylater_delay = NQ_TRYLATERDEL, trylater_cnt = 0, failed_auth = 0; 841 u_long xid; 842 u_quad_t frev; 843 char *auth_str; 844 845 nmp = VFSTONFS(vp->v_mount); 846 MALLOC(rep, struct nfsreq *, sizeof(struct nfsreq), M_NFSREQ, M_WAITOK); 847 rep->r_nmp = nmp; 848 rep->r_vp = vp; 849 rep->r_procp = procp; 850 rep->r_procnum = procnum; 851 i = 0; 852 m = mrest; 853 while (m) { 854 i += m->m_len; 855 m = m->m_next; 856 } 857 mrest_len = i; 858 859 /* 860 * Get the RPC header with authorization. 861 */ 862 kerbauth: 863 auth_str = (char *)0; 864 if (nmp->nm_flag & NFSMNT_KERB) { 865 if (failed_auth) { 866 error = nfs_getauth(nmp, rep, cred, &auth_type, 867 &auth_str, &auth_len); 868 if (error) { 869 free((caddr_t)rep, M_NFSREQ); 870 m_freem(mrest); 871 return (error); 872 } 873 } else { 874 auth_type = RPCAUTH_UNIX; 875 auth_len = 5 * NFSX_UNSIGNED; 876 } 877 } else { 878 auth_type = RPCAUTH_UNIX; 879 if (cred->cr_ngroups < 1) 880 panic("nfsreq nogrps"); 881 auth_len = ((((cred->cr_ngroups - 1) > nmp->nm_numgrps) ? 882 nmp->nm_numgrps : (cred->cr_ngroups - 1)) << 2) + 883 5 * NFSX_UNSIGNED; 884 } 885 m = nfsm_rpchead(cred, (nmp->nm_flag & NFSMNT_NQNFS), procnum, 886 auth_type, auth_len, auth_str, mrest, mrest_len, &mheadend, &xid); 887 if (auth_str) 888 free(auth_str, M_TEMP); 889 890 /* 891 * For stream protocols, insert a Sun RPC Record Mark. 892 */ 893 if (nmp->nm_sotype == SOCK_STREAM) { 894 M_PREPEND(m, NFSX_UNSIGNED, M_WAIT); 895 *mtod(m, u_long *) = htonl(0x80000000 | 896 (m->m_pkthdr.len - NFSX_UNSIGNED)); 897 } 898 rep->r_mreq = m; 899 rep->r_xid = xid; 900 tryagain: 901 if (nmp->nm_flag & NFSMNT_SOFT) 902 rep->r_retry = nmp->nm_retry; 903 else 904 rep->r_retry = NFS_MAXREXMIT + 1; /* past clip limit */ 905 rep->r_rtt = rep->r_rexmit = 0; 906 if (proct[procnum] > 0) 907 rep->r_flags = R_TIMING; 908 else 909 rep->r_flags = 0; 910 rep->r_mrep = NULL; 911 912 /* 913 * Do the client side RPC. 914 */ 915 nfsstats.rpcrequests++; 916 /* 917 * Chain request into list of outstanding requests. Be sure 918 * to put it LAST so timer finds oldest requests first. 919 */ 920 s = splsoftclock(); 921 reph = &nfsreqh; 922 reph->r_prev->r_next = rep; 923 rep->r_prev = reph->r_prev; 924 reph->r_prev = rep; 925 rep->r_next = reph; 926 927 /* Get send time for nqnfs */ 928 reqtime = time.tv_sec; 929 930 /* 931 * If backing off another request or avoiding congestion, don't 932 * send this one now but let timer do it. If not timing a request, 933 * do it now. 934 */ 935 if (nmp->nm_so && (nmp->nm_sotype != SOCK_DGRAM || 936 (nmp->nm_flag & NFSMNT_DUMBTIMR) || 937 nmp->nm_sent < nmp->nm_cwnd)) { 938 splx(s); 939 if (nmp->nm_soflags & PR_CONNREQUIRED) 940 error = nfs_sndlock(&nmp->nm_flag, rep); 941 if (!error) { 942 m = m_copym(m, 0, M_COPYALL, M_WAIT); 943 error = nfs_send(nmp->nm_so, nmp->nm_nam, m, rep); 944 if (nmp->nm_soflags & PR_CONNREQUIRED) 945 nfs_sndunlock(&nmp->nm_flag); 946 } 947 if (!error && (rep->r_flags & R_MUSTRESEND) == 0) { 948 nmp->nm_sent += NFS_CWNDSCALE; 949 rep->r_flags |= R_SENT; 950 } 951 } else { 952 splx(s); 953 rep->r_rtt = -1; 954 } 955 956 /* 957 * Wait for the reply from our send or the timer's. 958 */ 959 if (!error || error == EPIPE) 960 error = nfs_reply(rep); 961 962 /* 963 * RPC done, unlink the request. 964 */ 965 s = splsoftclock(); 966 rep->r_prev->r_next = rep->r_next; 967 rep->r_next->r_prev = rep->r_prev; 968 splx(s); 969 970 /* 971 * Decrement the outstanding request count. 972 */ 973 if (rep->r_flags & R_SENT) { 974 rep->r_flags &= ~R_SENT; /* paranoia */ 975 nmp->nm_sent -= NFS_CWNDSCALE; 976 } 977 978 /* 979 * If there was a successful reply and a tprintf msg. 980 * tprintf a response. 981 */ 982 if (!error && (rep->r_flags & R_TPRINTFMSG)) 983 nfs_msg(rep->r_procp, nmp->nm_mountp->mnt_stat.f_mntfromname, 984 "is alive again"); 985 mrep = rep->r_mrep; 986 md = rep->r_md; 987 dpos = rep->r_dpos; 988 if (error) { 989 m_freem(rep->r_mreq); 990 free((caddr_t)rep, M_NFSREQ); 991 return (error); 992 } 993 994 /* 995 * break down the rpc header and check if ok 996 */ 997 nfsm_dissect(tl, u_long *, 3*NFSX_UNSIGNED); 998 if (*tl++ == rpc_msgdenied) { 999 if (*tl == rpc_mismatch) 1000 error = EOPNOTSUPP; 1001 else if ((nmp->nm_flag & NFSMNT_KERB) && *tl++ == rpc_autherr) { 1002 if (*tl == rpc_rejectedcred && failed_auth == 0) { 1003 failed_auth++; 1004 mheadend->m_next = (struct mbuf *)0; 1005 m_freem(mrep); 1006 m_freem(rep->r_mreq); 1007 goto kerbauth; 1008 } else 1009 error = EAUTH; 1010 } else 1011 error = EACCES; 1012 m_freem(mrep); 1013 m_freem(rep->r_mreq); 1014 free((caddr_t)rep, M_NFSREQ); 1015 return (error); 1016 } 1017 1018 /* 1019 * skip over the auth_verf, someday we may want to cache auth_short's 1020 * for nfs_reqhead(), but for now just dump it 1021 */ 1022 if (*++tl != 0) { 1023 i = nfsm_rndup(fxdr_unsigned(long, *tl)); 1024 nfsm_adv(i); 1025 } 1026 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); 1027 /* 0 == ok */ 1028 if (*tl == 0) { 1029 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); 1030 if (*tl != 0) { 1031 error = fxdr_unsigned(int, *tl); 1032 m_freem(mrep); 1033 if ((nmp->nm_flag & NFSMNT_NQNFS) && 1034 error == NQNFS_TRYLATER) { 1035 error = 0; 1036 waituntil = time.tv_sec + trylater_delay; 1037 while (time.tv_sec < waituntil) 1038 (void) tsleep((caddr_t)&lbolt, 1039 PSOCK, "nqnfstry", 0); 1040 trylater_delay *= nfs_backoff[trylater_cnt]; 1041 if (trylater_cnt < 7) 1042 trylater_cnt++; 1043 goto tryagain; 1044 } 1045 1046 /* 1047 * If the File Handle was stale, invalidate the 1048 * lookup cache, just in case. 1049 */ 1050 if (error == ESTALE) 1051 cache_purge(vp); 1052 m_freem(rep->r_mreq); 1053 free((caddr_t)rep, M_NFSREQ); 1054 return (error); 1055 } 1056 1057 /* 1058 * For nqnfs, get any lease in reply 1059 */ 1060 if (nmp->nm_flag & NFSMNT_NQNFS) { 1061 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); 1062 if (*tl) { 1063 np = VTONFS(vp); 1064 nqlflag = fxdr_unsigned(int, *tl); 1065 nfsm_dissect(tl, u_long *, 4*NFSX_UNSIGNED); 1066 cachable = fxdr_unsigned(int, *tl++); 1067 reqtime += fxdr_unsigned(int, *tl++); 1068 if (reqtime > time.tv_sec) { 1069 fxdr_hyper(tl, &frev); 1070 nqnfs_clientlease(nmp, np, nqlflag, 1071 cachable, reqtime, frev); 1072 } 1073 } 1074 } 1075 *mrp = mrep; 1076 *mdp = md; 1077 *dposp = dpos; 1078 m_freem(rep->r_mreq); 1079 FREE((caddr_t)rep, M_NFSREQ); 1080 return (0); 1081 } 1082 m_freem(mrep); 1083 m_freem(rep->r_mreq); 1084 free((caddr_t)rep, M_NFSREQ); 1085 error = EPROTONOSUPPORT; 1086 nfsmout: 1087 return (error); 1088 } 1089 1090 /* 1091 * Generate the rpc reply header 1092 * siz arg. is used to decide if adding a cluster is worthwhile 1093 */ 1094 nfs_rephead(siz, nd, err, cache, frev, mrq, mbp, bposp) 1095 int siz; 1096 struct nfsd *nd; 1097 int err; 1098 int cache; 1099 u_quad_t *frev; 1100 struct mbuf **mrq; 1101 struct mbuf **mbp; 1102 caddr_t *bposp; 1103 { 1104 register u_long *tl; 1105 register struct mbuf *mreq; 1106 caddr_t bpos; 1107 struct mbuf *mb, *mb2; 1108 1109 MGETHDR(mreq, M_WAIT, MT_DATA); 1110 mb = mreq; 1111 /* 1112 * If this is a big reply, use a cluster else 1113 * try and leave leading space for the lower level headers. 1114 */ 1115 siz += RPC_REPLYSIZ; 1116 if (siz >= MINCLSIZE) { 1117 MCLGET(mreq, M_WAIT); 1118 } else 1119 mreq->m_data += max_hdr; 1120 tl = mtod(mreq, u_long *); 1121 mreq->m_len = 6*NFSX_UNSIGNED; 1122 bpos = ((caddr_t)tl)+mreq->m_len; 1123 *tl++ = nd->nd_retxid; 1124 *tl++ = rpc_reply; 1125 if (err == ERPCMISMATCH || err == NQNFS_AUTHERR) { 1126 *tl++ = rpc_msgdenied; 1127 if (err == NQNFS_AUTHERR) { 1128 *tl++ = rpc_autherr; 1129 *tl = rpc_rejectedcred; 1130 mreq->m_len -= NFSX_UNSIGNED; 1131 bpos -= NFSX_UNSIGNED; 1132 } else { 1133 *tl++ = rpc_mismatch; 1134 *tl++ = txdr_unsigned(2); 1135 *tl = txdr_unsigned(2); 1136 } 1137 } else { 1138 *tl++ = rpc_msgaccepted; 1139 *tl++ = 0; 1140 *tl++ = 0; 1141 switch (err) { 1142 case EPROGUNAVAIL: 1143 *tl = txdr_unsigned(RPC_PROGUNAVAIL); 1144 break; 1145 case EPROGMISMATCH: 1146 *tl = txdr_unsigned(RPC_PROGMISMATCH); 1147 nfsm_build(tl, u_long *, 2*NFSX_UNSIGNED); 1148 *tl++ = txdr_unsigned(2); 1149 *tl = txdr_unsigned(2); /* someday 3 */ 1150 break; 1151 case EPROCUNAVAIL: 1152 *tl = txdr_unsigned(RPC_PROCUNAVAIL); 1153 break; 1154 default: 1155 *tl = 0; 1156 if (err != VNOVAL) { 1157 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 1158 if (err) 1159 *tl = txdr_unsigned(nfsrv_errmap[err - 1]); 1160 else 1161 *tl = 0; 1162 } 1163 break; 1164 }; 1165 } 1166 1167 /* 1168 * For nqnfs, piggyback lease as requested. 1169 */ 1170 if (nd->nd_nqlflag != NQL_NOVAL && err == 0) { 1171 if (nd->nd_nqlflag) { 1172 nfsm_build(tl, u_long *, 5*NFSX_UNSIGNED); 1173 *tl++ = txdr_unsigned(nd->nd_nqlflag); 1174 *tl++ = txdr_unsigned(cache); 1175 *tl++ = txdr_unsigned(nd->nd_duration); 1176 txdr_hyper(frev, tl); 1177 } else { 1178 if (nd->nd_nqlflag != 0) 1179 panic("nqreph"); 1180 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 1181 *tl = 0; 1182 } 1183 } 1184 *mrq = mreq; 1185 *mbp = mb; 1186 *bposp = bpos; 1187 if (err != 0 && err != VNOVAL) 1188 nfsstats.srvrpc_errs++; 1189 return (0); 1190 } 1191 1192 /* 1193 * Nfs timer routine 1194 * Scan the nfsreq list and retranmit any requests that have timed out 1195 * To avoid retransmission attempts on STREAM sockets (in the future) make 1196 * sure to set the r_retry field to 0 (implies nm_retry == 0). 1197 */ 1198 void 1199 nfs_timer(arg) 1200 void *arg; 1201 { 1202 register struct nfsreq *rep; 1203 register struct mbuf *m; 1204 register struct socket *so; 1205 register struct nfsmount *nmp; 1206 register int timeo; 1207 static long lasttime = 0; 1208 int s, error; 1209 1210 s = splnet(); 1211 for (rep = nfsreqh.r_next; rep != &nfsreqh; rep = rep->r_next) { 1212 nmp = rep->r_nmp; 1213 if (rep->r_mrep || (rep->r_flags & R_SOFTTERM)) 1214 continue; 1215 if (nfs_sigintr(nmp, rep, rep->r_procp)) { 1216 rep->r_flags |= R_SOFTTERM; 1217 continue; 1218 } 1219 if (rep->r_rtt >= 0) { 1220 rep->r_rtt++; 1221 if (nmp->nm_flag & NFSMNT_DUMBTIMR) 1222 timeo = nmp->nm_timeo; 1223 else 1224 timeo = NFS_RTO(nmp, proct[rep->r_procnum]); 1225 if (nmp->nm_timeouts > 0) 1226 timeo *= nfs_backoff[nmp->nm_timeouts - 1]; 1227 if (rep->r_rtt <= timeo) 1228 continue; 1229 if (nmp->nm_timeouts < 8) 1230 nmp->nm_timeouts++; 1231 } 1232 /* 1233 * Check for server not responding 1234 */ 1235 if ((rep->r_flags & R_TPRINTFMSG) == 0 && 1236 rep->r_rexmit > nmp->nm_deadthresh) { 1237 nfs_msg(rep->r_procp, 1238 nmp->nm_mountp->mnt_stat.f_mntfromname, 1239 "not responding"); 1240 rep->r_flags |= R_TPRINTFMSG; 1241 } 1242 if (rep->r_rexmit >= rep->r_retry) { /* too many */ 1243 nfsstats.rpctimeouts++; 1244 rep->r_flags |= R_SOFTTERM; 1245 continue; 1246 } 1247 if (nmp->nm_sotype != SOCK_DGRAM) { 1248 if (++rep->r_rexmit > NFS_MAXREXMIT) 1249 rep->r_rexmit = NFS_MAXREXMIT; 1250 continue; 1251 } 1252 if ((so = nmp->nm_so) == NULL) 1253 continue; 1254 1255 /* 1256 * If there is enough space and the window allows.. 1257 * Resend it 1258 * Set r_rtt to -1 in case we fail to send it now. 1259 */ 1260 rep->r_rtt = -1; 1261 if (sbspace(&so->so_snd) >= rep->r_mreq->m_pkthdr.len && 1262 ((nmp->nm_flag & NFSMNT_DUMBTIMR) || 1263 (rep->r_flags & R_SENT) || 1264 nmp->nm_sent < nmp->nm_cwnd) && 1265 (m = m_copym(rep->r_mreq, 0, M_COPYALL, M_DONTWAIT))){ 1266 if ((nmp->nm_flag & NFSMNT_NOCONN) == 0) 1267 error = (*so->so_proto->pr_usrreq)(so, PRU_SEND, m, 1268 (struct mbuf *)0, (struct mbuf *)0); 1269 else 1270 error = (*so->so_proto->pr_usrreq)(so, PRU_SEND, m, 1271 nmp->nm_nam, (struct mbuf *)0); 1272 if (error) { 1273 if (NFSIGNORE_SOERROR(nmp->nm_soflags, error)) 1274 so->so_error = 0; 1275 } else { 1276 /* 1277 * Iff first send, start timing 1278 * else turn timing off, backoff timer 1279 * and divide congestion window by 2. 1280 */ 1281 if (rep->r_flags & R_SENT) { 1282 rep->r_flags &= ~R_TIMING; 1283 if (++rep->r_rexmit > NFS_MAXREXMIT) 1284 rep->r_rexmit = NFS_MAXREXMIT; 1285 nmp->nm_cwnd >>= 1; 1286 if (nmp->nm_cwnd < NFS_CWNDSCALE) 1287 nmp->nm_cwnd = NFS_CWNDSCALE; 1288 nfsstats.rpcretries++; 1289 } else { 1290 rep->r_flags |= R_SENT; 1291 nmp->nm_sent += NFS_CWNDSCALE; 1292 } 1293 rep->r_rtt = 0; 1294 } 1295 } 1296 } 1297 1298 /* 1299 * Call the nqnfs server timer once a second to handle leases. 1300 */ 1301 if (lasttime != time.tv_sec) { 1302 lasttime = time.tv_sec; 1303 nqnfs_serverd(); 1304 } 1305 splx(s); 1306 timeout(nfs_timer, (caddr_t)0, hz/NFS_HZ); 1307 } 1308 1309 /* 1310 * Test for a termination condition pending on the process. 1311 * This is used for NFSMNT_INT mounts. 1312 */ 1313 nfs_sigintr(nmp, rep, p) 1314 struct nfsmount *nmp; 1315 struct nfsreq *rep; 1316 register struct proc *p; 1317 { 1318 1319 if (rep && (rep->r_flags & R_SOFTTERM)) 1320 return (EINTR); 1321 if (!(nmp->nm_flag & NFSMNT_INT)) 1322 return (0); 1323 if (p && p->p_sig && (((p->p_sig &~ p->p_sigmask) &~ p->p_sigignore) & 1324 NFSINT_SIGMASK)) 1325 return (EINTR); 1326 return (0); 1327 } 1328 1329 /* 1330 * Lock a socket against others. 1331 * Necessary for STREAM sockets to ensure you get an entire rpc request/reply 1332 * and also to avoid race conditions between the processes with nfs requests 1333 * in progress when a reconnect is necessary. 1334 */ 1335 nfs_sndlock(flagp, rep) 1336 register int *flagp; 1337 struct nfsreq *rep; 1338 { 1339 struct proc *p; 1340 1341 if (rep) 1342 p = rep->r_procp; 1343 else 1344 p = (struct proc *)0; 1345 while (*flagp & NFSMNT_SNDLOCK) { 1346 if (nfs_sigintr(rep->r_nmp, rep, p)) 1347 return (EINTR); 1348 *flagp |= NFSMNT_WANTSND; 1349 (void) tsleep((caddr_t)flagp, PZERO-1, "nfsndlck", 0); 1350 } 1351 *flagp |= NFSMNT_SNDLOCK; 1352 return (0); 1353 } 1354 1355 /* 1356 * Unlock the stream socket for others. 1357 */ 1358 void 1359 nfs_sndunlock(flagp) 1360 register int *flagp; 1361 { 1362 1363 if ((*flagp & NFSMNT_SNDLOCK) == 0) 1364 panic("nfs sndunlock"); 1365 *flagp &= ~NFSMNT_SNDLOCK; 1366 if (*flagp & NFSMNT_WANTSND) { 1367 *flagp &= ~NFSMNT_WANTSND; 1368 wakeup((caddr_t)flagp); 1369 } 1370 } 1371 1372 nfs_rcvlock(rep) 1373 register struct nfsreq *rep; 1374 { 1375 register int *flagp = &rep->r_nmp->nm_flag; 1376 1377 while (*flagp & NFSMNT_RCVLOCK) { 1378 if (nfs_sigintr(rep->r_nmp, rep, rep->r_procp)) 1379 return (EINTR); 1380 *flagp |= NFSMNT_WANTRCV; 1381 (void) tsleep((caddr_t)flagp, PZERO-1, "nfsrcvlck", 0); 1382 } 1383 *flagp |= NFSMNT_RCVLOCK; 1384 return (0); 1385 } 1386 1387 /* 1388 * Unlock the stream socket for others. 1389 */ 1390 void 1391 nfs_rcvunlock(flagp) 1392 register int *flagp; 1393 { 1394 1395 if ((*flagp & NFSMNT_RCVLOCK) == 0) 1396 panic("nfs rcvunlock"); 1397 *flagp &= ~NFSMNT_RCVLOCK; 1398 if (*flagp & NFSMNT_WANTRCV) { 1399 *flagp &= ~NFSMNT_WANTRCV; 1400 wakeup((caddr_t)flagp); 1401 } 1402 } 1403 1404 /* 1405 * Check for badly aligned mbuf data areas and 1406 * realign data in an mbuf list by copying the data areas up, as required. 1407 */ 1408 void 1409 nfs_realign(m, hsiz) 1410 register struct mbuf *m; 1411 int hsiz; 1412 { 1413 register struct mbuf *m2; 1414 register int siz, mlen, olen; 1415 register caddr_t tcp, fcp; 1416 struct mbuf *mnew; 1417 1418 while (m) { 1419 /* 1420 * This never happens for UDP, rarely happens for TCP 1421 * but frequently happens for iso transport. 1422 */ 1423 if ((m->m_len & 0x3) || (mtod(m, int) & 0x3)) { 1424 olen = m->m_len; 1425 fcp = mtod(m, caddr_t); 1426 m->m_flags &= ~M_PKTHDR; 1427 if (m->m_flags & M_EXT) 1428 m->m_data = m->m_ext.ext_buf; 1429 else 1430 m->m_data = m->m_dat; 1431 m->m_len = 0; 1432 tcp = mtod(m, caddr_t); 1433 mnew = m; 1434 m2 = m->m_next; 1435 1436 /* 1437 * If possible, only put the first invariant part 1438 * of the RPC header in the first mbuf. 1439 */ 1440 if (olen <= hsiz) 1441 mlen = hsiz; 1442 else 1443 mlen = M_TRAILINGSPACE(m); 1444 1445 /* 1446 * Loop through the mbuf list consolidating data. 1447 */ 1448 while (m) { 1449 while (olen > 0) { 1450 if (mlen == 0) { 1451 m2->m_flags &= ~M_PKTHDR; 1452 if (m2->m_flags & M_EXT) 1453 m2->m_data = m2->m_ext.ext_buf; 1454 else 1455 m2->m_data = m2->m_dat; 1456 m2->m_len = 0; 1457 mlen = M_TRAILINGSPACE(m2); 1458 tcp = mtod(m2, caddr_t); 1459 mnew = m2; 1460 m2 = m2->m_next; 1461 } 1462 siz = min(mlen, olen); 1463 if (tcp != fcp) 1464 bcopy(fcp, tcp, siz); 1465 mnew->m_len += siz; 1466 mlen -= siz; 1467 olen -= siz; 1468 tcp += siz; 1469 fcp += siz; 1470 } 1471 m = m->m_next; 1472 if (m) { 1473 olen = m->m_len; 1474 fcp = mtod(m, caddr_t); 1475 } 1476 } 1477 1478 /* 1479 * Finally, set m_len == 0 for any trailing mbufs that have 1480 * been copied out of. 1481 */ 1482 while (m2) { 1483 m2->m_len = 0; 1484 m2 = m2->m_next; 1485 } 1486 return; 1487 } 1488 m = m->m_next; 1489 } 1490 } 1491 1492 /* 1493 * Socket upcall routine for the nfsd sockets. 1494 * The caddr_t arg is a pointer to the "struct nfssvc_sock". 1495 * Essentially do as much as possible non-blocking, else punt and it will 1496 * be called with M_WAIT from an nfsd. 1497 */ 1498 void 1499 nfsrv_rcv(so, arg, waitflag) 1500 struct socket *so; 1501 caddr_t arg; 1502 int waitflag; 1503 { 1504 register struct nfssvc_sock *slp = (struct nfssvc_sock *)arg; 1505 register struct mbuf *m; 1506 struct mbuf *mp, *nam; 1507 struct uio auio; 1508 int flags, error; 1509 1510 if ((slp->ns_flag & SLP_VALID) == 0) 1511 return; 1512 #ifdef notdef 1513 /* 1514 * Define this to test for nfsds handling this under heavy load. 1515 */ 1516 if (waitflag == M_DONTWAIT) { 1517 slp->ns_flag |= SLP_NEEDQ; goto dorecs; 1518 } 1519 #endif 1520 auio.uio_procp = NULL; 1521 if (so->so_type == SOCK_STREAM) { 1522 /* 1523 * If there are already records on the queue, defer soreceive() 1524 * to an nfsd so that there is feedback to the TCP layer that 1525 * the nfs servers are heavily loaded. 1526 */ 1527 if (slp->ns_rec && waitflag == M_DONTWAIT) { 1528 slp->ns_flag |= SLP_NEEDQ; 1529 goto dorecs; 1530 } 1531 1532 /* 1533 * Do soreceive(). 1534 */ 1535 auio.uio_resid = 1000000000; 1536 flags = MSG_DONTWAIT; 1537 error = soreceive(so, &nam, &auio, &mp, (struct mbuf **)0, &flags); 1538 if (error || mp == (struct mbuf *)0) { 1539 if (error == EWOULDBLOCK) 1540 slp->ns_flag |= SLP_NEEDQ; 1541 else 1542 slp->ns_flag |= SLP_DISCONN; 1543 goto dorecs; 1544 } 1545 m = mp; 1546 if (slp->ns_rawend) { 1547 slp->ns_rawend->m_next = m; 1548 slp->ns_cc += 1000000000 - auio.uio_resid; 1549 } else { 1550 slp->ns_raw = m; 1551 slp->ns_cc = 1000000000 - auio.uio_resid; 1552 } 1553 while (m->m_next) 1554 m = m->m_next; 1555 slp->ns_rawend = m; 1556 1557 /* 1558 * Now try and parse record(s) out of the raw stream data. 1559 */ 1560 if (error = nfsrv_getstream(slp, waitflag)) { 1561 if (error == EPERM) 1562 slp->ns_flag |= SLP_DISCONN; 1563 else 1564 slp->ns_flag |= SLP_NEEDQ; 1565 } 1566 } else { 1567 do { 1568 auio.uio_resid = 1000000000; 1569 flags = MSG_DONTWAIT; 1570 error = soreceive(so, &nam, &auio, &mp, 1571 (struct mbuf **)0, &flags); 1572 if (mp) { 1573 nfs_realign(mp, 10 * NFSX_UNSIGNED); 1574 if (nam) { 1575 m = nam; 1576 m->m_next = mp; 1577 } else 1578 m = mp; 1579 if (slp->ns_recend) 1580 slp->ns_recend->m_nextpkt = m; 1581 else 1582 slp->ns_rec = m; 1583 slp->ns_recend = m; 1584 m->m_nextpkt = (struct mbuf *)0; 1585 } 1586 if (error) { 1587 if ((so->so_proto->pr_flags & PR_CONNREQUIRED) 1588 && error != EWOULDBLOCK) { 1589 slp->ns_flag |= SLP_DISCONN; 1590 goto dorecs; 1591 } 1592 } 1593 } while (mp); 1594 } 1595 1596 /* 1597 * Now try and process the request records, non-blocking. 1598 */ 1599 dorecs: 1600 if (waitflag == M_DONTWAIT && 1601 (slp->ns_rec || (slp->ns_flag & (SLP_NEEDQ | SLP_DISCONN)))) 1602 nfsrv_wakenfsd(slp); 1603 } 1604 1605 /* 1606 * Try and extract an RPC request from the mbuf data list received on a 1607 * stream socket. The "waitflag" argument indicates whether or not it 1608 * can sleep. 1609 */ 1610 nfsrv_getstream(slp, waitflag) 1611 register struct nfssvc_sock *slp; 1612 int waitflag; 1613 { 1614 register struct mbuf *m; 1615 register char *cp1, *cp2; 1616 register int len; 1617 struct mbuf *om, *m2, *recm; 1618 u_long recmark; 1619 1620 if (slp->ns_flag & SLP_GETSTREAM) 1621 panic("nfs getstream"); 1622 slp->ns_flag |= SLP_GETSTREAM; 1623 for (;;) { 1624 if (slp->ns_reclen == 0) { 1625 if (slp->ns_cc < NFSX_UNSIGNED) { 1626 slp->ns_flag &= ~SLP_GETSTREAM; 1627 return (0); 1628 } 1629 m = slp->ns_raw; 1630 if (m->m_len >= NFSX_UNSIGNED) { 1631 bcopy(mtod(m, caddr_t), (caddr_t)&recmark, NFSX_UNSIGNED); 1632 m->m_data += NFSX_UNSIGNED; 1633 m->m_len -= NFSX_UNSIGNED; 1634 } else { 1635 cp1 = (caddr_t)&recmark; 1636 cp2 = mtod(m, caddr_t); 1637 while (cp1 < ((caddr_t)&recmark) + NFSX_UNSIGNED) { 1638 while (m->m_len == 0) { 1639 m = m->m_next; 1640 cp2 = mtod(m, caddr_t); 1641 } 1642 *cp1++ = *cp2++; 1643 m->m_data++; 1644 m->m_len--; 1645 } 1646 } 1647 slp->ns_cc -= NFSX_UNSIGNED; 1648 slp->ns_reclen = ntohl(recmark) & ~0x80000000; 1649 if (slp->ns_reclen < NFS_MINPACKET || slp->ns_reclen > NFS_MAXPACKET) { 1650 slp->ns_flag &= ~SLP_GETSTREAM; 1651 return (EPERM); 1652 } 1653 } 1654 1655 /* 1656 * Now get the record part. 1657 */ 1658 if (slp->ns_cc == slp->ns_reclen) { 1659 recm = slp->ns_raw; 1660 slp->ns_raw = slp->ns_rawend = (struct mbuf *)0; 1661 slp->ns_cc = slp->ns_reclen = 0; 1662 } else if (slp->ns_cc > slp->ns_reclen) { 1663 len = 0; 1664 m = slp->ns_raw; 1665 om = (struct mbuf *)0; 1666 while (len < slp->ns_reclen) { 1667 if ((len + m->m_len) > slp->ns_reclen) { 1668 m2 = m_copym(m, 0, slp->ns_reclen - len, 1669 waitflag); 1670 if (m2) { 1671 if (om) { 1672 om->m_next = m2; 1673 recm = slp->ns_raw; 1674 } else 1675 recm = m2; 1676 m->m_data += slp->ns_reclen - len; 1677 m->m_len -= slp->ns_reclen - len; 1678 len = slp->ns_reclen; 1679 } else { 1680 slp->ns_flag &= ~SLP_GETSTREAM; 1681 return (EWOULDBLOCK); 1682 } 1683 } else if ((len + m->m_len) == slp->ns_reclen) { 1684 om = m; 1685 len += m->m_len; 1686 m = m->m_next; 1687 recm = slp->ns_raw; 1688 om->m_next = (struct mbuf *)0; 1689 } else { 1690 om = m; 1691 len += m->m_len; 1692 m = m->m_next; 1693 } 1694 } 1695 slp->ns_raw = m; 1696 slp->ns_cc -= len; 1697 slp->ns_reclen = 0; 1698 } else { 1699 slp->ns_flag &= ~SLP_GETSTREAM; 1700 return (0); 1701 } 1702 nfs_realign(recm, 10 * NFSX_UNSIGNED); 1703 if (slp->ns_recend) 1704 slp->ns_recend->m_nextpkt = recm; 1705 else 1706 slp->ns_rec = recm; 1707 slp->ns_recend = recm; 1708 } 1709 } 1710 1711 /* 1712 * Parse an RPC header. 1713 */ 1714 nfsrv_dorec(slp, nd) 1715 register struct nfssvc_sock *slp; 1716 register struct nfsd *nd; 1717 { 1718 register struct mbuf *m; 1719 int error; 1720 1721 if ((slp->ns_flag & SLP_VALID) == 0 || 1722 (m = slp->ns_rec) == (struct mbuf *)0) 1723 return (ENOBUFS); 1724 if (slp->ns_rec = m->m_nextpkt) 1725 m->m_nextpkt = (struct mbuf *)0; 1726 else 1727 slp->ns_recend = (struct mbuf *)0; 1728 if (m->m_type == MT_SONAME) { 1729 nd->nd_nam = m; 1730 nd->nd_md = nd->nd_mrep = m->m_next; 1731 m->m_next = (struct mbuf *)0; 1732 } else { 1733 nd->nd_nam = (struct mbuf *)0; 1734 nd->nd_md = nd->nd_mrep = m; 1735 } 1736 nd->nd_dpos = mtod(nd->nd_md, caddr_t); 1737 if (error = nfs_getreq(nd, TRUE)) { 1738 m_freem(nd->nd_nam); 1739 return (error); 1740 } 1741 return (0); 1742 } 1743 1744 /* 1745 * Parse an RPC request 1746 * - verify it 1747 * - fill in the cred struct. 1748 */ 1749 nfs_getreq(nd, has_header) 1750 register struct nfsd *nd; 1751 int has_header; 1752 { 1753 register int len, i; 1754 register u_long *tl; 1755 register long t1; 1756 struct uio uio; 1757 struct iovec iov; 1758 caddr_t dpos, cp2; 1759 u_long nfsvers, auth_type; 1760 int error = 0, nqnfs = 0; 1761 struct mbuf *mrep, *md; 1762 1763 mrep = nd->nd_mrep; 1764 md = nd->nd_md; 1765 dpos = nd->nd_dpos; 1766 if (has_header) { 1767 nfsm_dissect(tl, u_long *, 10*NFSX_UNSIGNED); 1768 nd->nd_retxid = *tl++; 1769 if (*tl++ != rpc_call) { 1770 m_freem(mrep); 1771 return (EBADRPC); 1772 } 1773 } else { 1774 nfsm_dissect(tl, u_long *, 8*NFSX_UNSIGNED); 1775 } 1776 nd->nd_repstat = 0; 1777 if (*tl++ != rpc_vers) { 1778 nd->nd_repstat = ERPCMISMATCH; 1779 nd->nd_procnum = NFSPROC_NOOP; 1780 return (0); 1781 } 1782 nfsvers = nfs_vers; 1783 if (*tl != nfs_prog) { 1784 if (*tl == nqnfs_prog) { 1785 nqnfs++; 1786 nfsvers = nqnfs_vers; 1787 } else { 1788 nd->nd_repstat = EPROGUNAVAIL; 1789 nd->nd_procnum = NFSPROC_NOOP; 1790 return (0); 1791 } 1792 } 1793 tl++; 1794 if (*tl++ != nfsvers) { 1795 nd->nd_repstat = EPROGMISMATCH; 1796 nd->nd_procnum = NFSPROC_NOOP; 1797 return (0); 1798 } 1799 nd->nd_procnum = fxdr_unsigned(u_long, *tl++); 1800 if (nd->nd_procnum == NFSPROC_NULL) 1801 return (0); 1802 if (nd->nd_procnum >= NFS_NPROCS || 1803 (!nqnfs && nd->nd_procnum > NFSPROC_STATFS) || 1804 (*tl != rpc_auth_unix && *tl != rpc_auth_kerb)) { 1805 nd->nd_repstat = EPROCUNAVAIL; 1806 nd->nd_procnum = NFSPROC_NOOP; 1807 return (0); 1808 } 1809 auth_type = *tl++; 1810 len = fxdr_unsigned(int, *tl++); 1811 if (len < 0 || len > RPCAUTH_MAXSIZ) { 1812 m_freem(mrep); 1813 return (EBADRPC); 1814 } 1815 1816 /* 1817 * Handle auth_unix or auth_kerb. 1818 */ 1819 if (auth_type == rpc_auth_unix) { 1820 len = fxdr_unsigned(int, *++tl); 1821 if (len < 0 || len > NFS_MAXNAMLEN) { 1822 m_freem(mrep); 1823 return (EBADRPC); 1824 } 1825 nfsm_adv(nfsm_rndup(len)); 1826 nfsm_dissect(tl, u_long *, 3*NFSX_UNSIGNED); 1827 nd->nd_cr.cr_uid = fxdr_unsigned(uid_t, *tl++); 1828 nd->nd_cr.cr_gid = fxdr_unsigned(gid_t, *tl++); 1829 len = fxdr_unsigned(int, *tl); 1830 if (len < 0 || len > RPCAUTH_UNIXGIDS) { 1831 m_freem(mrep); 1832 return (EBADRPC); 1833 } 1834 nfsm_dissect(tl, u_long *, (len + 2)*NFSX_UNSIGNED); 1835 for (i = 1; i <= len; i++) 1836 if (i < NGROUPS) 1837 nd->nd_cr.cr_groups[i] = fxdr_unsigned(gid_t, *tl++); 1838 else 1839 tl++; 1840 nd->nd_cr.cr_ngroups = (len >= NGROUPS) ? NGROUPS : (len + 1); 1841 } else if (auth_type == rpc_auth_kerb) { 1842 nd->nd_cr.cr_uid = fxdr_unsigned(uid_t, *tl++); 1843 nd->nd_authlen = fxdr_unsigned(int, *tl); 1844 iov.iov_len = uio.uio_resid = nfsm_rndup(nd->nd_authlen); 1845 if (uio.uio_resid > (len - 2*NFSX_UNSIGNED)) { 1846 m_freem(mrep); 1847 return (EBADRPC); 1848 } 1849 uio.uio_offset = 0; 1850 uio.uio_iov = &iov; 1851 uio.uio_iovcnt = 1; 1852 uio.uio_segflg = UIO_SYSSPACE; 1853 iov.iov_base = (caddr_t)nd->nd_authstr; 1854 nfsm_mtouio(&uio, uio.uio_resid); 1855 nfsm_dissect(tl, u_long *, 2*NFSX_UNSIGNED); 1856 nd->nd_flag |= NFSD_NEEDAUTH; 1857 } 1858 1859 /* 1860 * Do we have any use for the verifier. 1861 * According to the "Remote Procedure Call Protocol Spec." it 1862 * should be AUTH_NULL, but some clients make it AUTH_UNIX? 1863 * For now, just skip over it 1864 */ 1865 len = fxdr_unsigned(int, *++tl); 1866 if (len < 0 || len > RPCAUTH_MAXSIZ) { 1867 m_freem(mrep); 1868 return (EBADRPC); 1869 } 1870 if (len > 0) { 1871 nfsm_adv(nfsm_rndup(len)); 1872 } 1873 1874 /* 1875 * For nqnfs, get piggybacked lease request. 1876 */ 1877 if (nqnfs && nd->nd_procnum != NQNFSPROC_EVICTED) { 1878 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); 1879 nd->nd_nqlflag = fxdr_unsigned(int, *tl); 1880 if (nd->nd_nqlflag) { 1881 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); 1882 nd->nd_duration = fxdr_unsigned(int, *tl); 1883 } else 1884 nd->nd_duration = NQ_MINLEASE; 1885 } else { 1886 nd->nd_nqlflag = NQL_NOVAL; 1887 nd->nd_duration = NQ_MINLEASE; 1888 } 1889 nd->nd_md = md; 1890 nd->nd_dpos = dpos; 1891 return (0); 1892 nfsmout: 1893 return (error); 1894 } 1895 1896 /* 1897 * Search for a sleeping nfsd and wake it up. 1898 * SIDE EFFECT: If none found, set NFSD_CHECKSLP flag, so that one of the 1899 * running nfsds will go look for the work in the nfssvc_sock list. 1900 */ 1901 void 1902 nfsrv_wakenfsd(slp) 1903 struct nfssvc_sock *slp; 1904 { 1905 register struct nfsd *nd = nfsd_head.nd_next; 1906 1907 if ((slp->ns_flag & SLP_VALID) == 0) 1908 return; 1909 while (nd != (struct nfsd *)&nfsd_head) { 1910 if (nd->nd_flag & NFSD_WAITING) { 1911 nd->nd_flag &= ~NFSD_WAITING; 1912 if (nd->nd_slp) 1913 panic("nfsd wakeup"); 1914 slp->ns_sref++; 1915 nd->nd_slp = slp; 1916 wakeup((caddr_t)nd); 1917 return; 1918 } 1919 nd = nd->nd_next; 1920 } 1921 slp->ns_flag |= SLP_DOREC; 1922 nfsd_head.nd_flag |= NFSD_CHECKSLP; 1923 } 1924 1925 nfs_msg(p, server, msg) 1926 struct proc *p; 1927 char *server, *msg; 1928 { 1929 tpr_t tpr; 1930 1931 if (p) 1932 tpr = tprintf_open(p); 1933 else 1934 tpr = NULL; 1935 tprintf(tpr, "nfs server %s: %s\n", server, msg); 1936 tprintf_close(tpr); 1937 } 1938