1 /* 2 * Copyright (c) 1989, 1991, 1993 3 * The Regents of the University of California. 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 8.4 (Berkeley) 08/18/94 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; 134 135 int nfsrv_null(), 136 nfsrv_getattr(), 137 nfsrv_setattr(), 138 nfsrv_lookup(), 139 nfsrv_readlink(), 140 nfsrv_read(), 141 nfsrv_write(), 142 nfsrv_create(), 143 nfsrv_remove(), 144 nfsrv_rename(), 145 nfsrv_link(), 146 nfsrv_symlink(), 147 nfsrv_mkdir(), 148 nfsrv_rmdir(), 149 nfsrv_readdir(), 150 nfsrv_statfs(), 151 nfsrv_noop(), 152 nqnfsrv_readdirlook(), 153 nqnfsrv_getlease(), 154 nqnfsrv_vacated(), 155 nqnfsrv_access(); 156 157 int (*nfsrv_procs[NFS_NPROCS])() = { 158 nfsrv_null, 159 nfsrv_getattr, 160 nfsrv_setattr, 161 nfsrv_noop, 162 nfsrv_lookup, 163 nfsrv_readlink, 164 nfsrv_read, 165 nfsrv_noop, 166 nfsrv_write, 167 nfsrv_create, 168 nfsrv_remove, 169 nfsrv_rename, 170 nfsrv_link, 171 nfsrv_symlink, 172 nfsrv_mkdir, 173 nfsrv_rmdir, 174 nfsrv_readdir, 175 nfsrv_statfs, 176 nqnfsrv_readdirlook, 177 nqnfsrv_getlease, 178 nqnfsrv_vacated, 179 nfsrv_noop, 180 nqnfsrv_access, 181 }; 182 183 /* 184 * Initialize sockets and congestion for a new NFS connection. 185 * We do not free the sockaddr if error. 186 */ 187 nfs_connect(nmp, rep) 188 register struct nfsmount *nmp; 189 struct nfsreq *rep; 190 { 191 register struct socket *so; 192 int s, error, rcvreserve, sndreserve; 193 struct sockaddr *saddr; 194 struct sockaddr_in *sin; 195 struct mbuf *m; 196 u_short tport; 197 198 nmp->nm_so = (struct socket *)0; 199 saddr = mtod(nmp->nm_nam, struct sockaddr *); 200 if (error = socreate(saddr->sa_family, 201 &nmp->nm_so, nmp->nm_sotype, nmp->nm_soproto)) 202 goto bad; 203 so = nmp->nm_so; 204 nmp->nm_soflags = so->so_proto->pr_flags; 205 206 /* 207 * Some servers require that the client port be a reserved port number. 208 */ 209 if (saddr->sa_family == AF_INET && (nmp->nm_flag & NFSMNT_RESVPORT)) { 210 MGET(m, M_WAIT, MT_SONAME); 211 sin = mtod(m, struct sockaddr_in *); 212 sin->sin_len = m->m_len = sizeof (struct sockaddr_in); 213 sin->sin_family = AF_INET; 214 sin->sin_addr.s_addr = INADDR_ANY; 215 tport = IPPORT_RESERVED - 1; 216 sin->sin_port = htons(tport); 217 while ((error = sobind(so, m)) == EADDRINUSE && 218 --tport > IPPORT_RESERVED / 2) 219 sin->sin_port = htons(tport); 220 m_freem(m); 221 if (error) 222 goto bad; 223 } 224 225 /* 226 * Protocols that do not require connections may be optionally left 227 * unconnected for servers that reply from a port other than NFS_PORT. 228 */ 229 if (nmp->nm_flag & NFSMNT_NOCONN) { 230 if (nmp->nm_soflags & PR_CONNREQUIRED) { 231 error = ENOTCONN; 232 goto bad; 233 } 234 } else { 235 if (error = soconnect(so, nmp->nm_nam)) 236 goto bad; 237 238 /* 239 * Wait for the connection to complete. Cribbed from the 240 * connect system call but with the wait timing out so 241 * that interruptible mounts don't hang here for a long time. 242 */ 243 s = splnet(); 244 while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) { 245 (void) tsleep((caddr_t)&so->so_timeo, PSOCK, 246 "nfscon", 2 * hz); 247 if ((so->so_state & SS_ISCONNECTING) && 248 so->so_error == 0 && rep && 249 (error = nfs_sigintr(nmp, rep, rep->r_procp))) { 250 so->so_state &= ~SS_ISCONNECTING; 251 splx(s); 252 goto bad; 253 } 254 } 255 if (so->so_error) { 256 error = so->so_error; 257 so->so_error = 0; 258 splx(s); 259 goto bad; 260 } 261 splx(s); 262 } 263 if (nmp->nm_flag & (NFSMNT_SOFT | NFSMNT_INT)) { 264 so->so_rcv.sb_timeo = (5 * hz); 265 so->so_snd.sb_timeo = (5 * hz); 266 } else { 267 so->so_rcv.sb_timeo = 0; 268 so->so_snd.sb_timeo = 0; 269 } 270 if (nmp->nm_sotype == SOCK_DGRAM) { 271 sndreserve = nmp->nm_wsize + NFS_MAXPKTHDR; 272 rcvreserve = nmp->nm_rsize + NFS_MAXPKTHDR; 273 } else if (nmp->nm_sotype == SOCK_SEQPACKET) { 274 sndreserve = (nmp->nm_wsize + NFS_MAXPKTHDR) * 2; 275 rcvreserve = (nmp->nm_rsize + NFS_MAXPKTHDR) * 2; 276 } else { 277 if (nmp->nm_sotype != SOCK_STREAM) 278 panic("nfscon sotype"); 279 if (so->so_proto->pr_flags & PR_CONNREQUIRED) { 280 MGET(m, M_WAIT, MT_SOOPTS); 281 *mtod(m, int *) = 1; 282 m->m_len = sizeof(int); 283 sosetopt(so, SOL_SOCKET, SO_KEEPALIVE, m); 284 } 285 if (so->so_proto->pr_protocol == IPPROTO_TCP) { 286 MGET(m, M_WAIT, MT_SOOPTS); 287 *mtod(m, int *) = 1; 288 m->m_len = sizeof(int); 289 sosetopt(so, IPPROTO_TCP, TCP_NODELAY, m); 290 } 291 sndreserve = (nmp->nm_wsize + NFS_MAXPKTHDR + sizeof (u_long)) 292 * 2; 293 rcvreserve = (nmp->nm_rsize + NFS_MAXPKTHDR + sizeof (u_long)) 294 * 2; 295 } 296 if (error = soreserve(so, sndreserve, rcvreserve)) 297 goto bad; 298 so->so_rcv.sb_flags |= SB_NOINTR; 299 so->so_snd.sb_flags |= SB_NOINTR; 300 301 /* Initialize other non-zero congestion variables */ 302 nmp->nm_srtt[0] = nmp->nm_srtt[1] = nmp->nm_srtt[2] = nmp->nm_srtt[3] = 303 nmp->nm_srtt[4] = (NFS_TIMEO << 3); 304 nmp->nm_sdrtt[0] = nmp->nm_sdrtt[1] = nmp->nm_sdrtt[2] = 305 nmp->nm_sdrtt[3] = nmp->nm_sdrtt[4] = 0; 306 nmp->nm_cwnd = NFS_MAXCWND / 2; /* Initial send window */ 307 nmp->nm_sent = 0; 308 nmp->nm_timeouts = 0; 309 return (0); 310 311 bad: 312 nfs_disconnect(nmp); 313 return (error); 314 } 315 316 /* 317 * Reconnect routine: 318 * Called when a connection is broken on a reliable protocol. 319 * - clean up the old socket 320 * - nfs_connect() again 321 * - set R_MUSTRESEND for all outstanding requests on mount point 322 * If this fails the mount point is DEAD! 323 * nb: Must be called with the nfs_sndlock() set on the mount point. 324 */ 325 nfs_reconnect(rep) 326 register struct nfsreq *rep; 327 { 328 register struct nfsreq *rp; 329 register struct nfsmount *nmp = rep->r_nmp; 330 int error; 331 332 nfs_disconnect(nmp); 333 while (error = nfs_connect(nmp, rep)) { 334 if (error == EINTR || error == ERESTART) 335 return (EINTR); 336 (void) tsleep((caddr_t)&lbolt, PSOCK, "nfscon", 0); 337 } 338 339 /* 340 * Loop through outstanding request list and fix up all requests 341 * on old socket. 342 */ 343 for (rp = nfs_reqq.tqh_first; rp != 0; rp = rp->r_chain.tqe_next) { 344 if (rp->r_nmp == nmp) 345 rp->r_flags |= R_MUSTRESEND; 346 } 347 return (0); 348 } 349 350 /* 351 * NFS disconnect. Clean up and unlink. 352 */ 353 void 354 nfs_disconnect(nmp) 355 register struct nfsmount *nmp; 356 { 357 register struct socket *so; 358 359 if (nmp->nm_so) { 360 so = nmp->nm_so; 361 nmp->nm_so = (struct socket *)0; 362 soshutdown(so, 2); 363 soclose(so); 364 } 365 } 366 367 /* 368 * This is the nfs send routine. For connection based socket types, it 369 * must be called with an nfs_sndlock() on the socket. 370 * "rep == NULL" indicates that it has been called from a server. 371 * For the client side: 372 * - return EINTR if the RPC is terminated, 0 otherwise 373 * - set R_MUSTRESEND if the send fails for any reason 374 * - do any cleanup required by recoverable socket errors (???) 375 * For the server side: 376 * - return EINTR or ERESTART if interrupted by a signal 377 * - return EPIPE if a connection is lost for connection based sockets (TCP...) 378 * - do any cleanup required by recoverable socket errors (???) 379 */ 380 nfs_send(so, nam, top, rep) 381 register struct socket *so; 382 struct mbuf *nam; 383 register struct mbuf *top; 384 struct nfsreq *rep; 385 { 386 struct mbuf *sendnam; 387 int error, soflags, flags; 388 389 if (rep) { 390 if (rep->r_flags & R_SOFTTERM) { 391 m_freem(top); 392 return (EINTR); 393 } 394 if ((so = rep->r_nmp->nm_so) == NULL) { 395 rep->r_flags |= R_MUSTRESEND; 396 m_freem(top); 397 return (0); 398 } 399 rep->r_flags &= ~R_MUSTRESEND; 400 soflags = rep->r_nmp->nm_soflags; 401 } else 402 soflags = so->so_proto->pr_flags; 403 if ((soflags & PR_CONNREQUIRED) || (so->so_state & SS_ISCONNECTED)) 404 sendnam = (struct mbuf *)0; 405 else 406 sendnam = nam; 407 if (so->so_type == SOCK_SEQPACKET) 408 flags = MSG_EOR; 409 else 410 flags = 0; 411 412 error = sosend(so, sendnam, (struct uio *)0, top, 413 (struct mbuf *)0, flags); 414 if (error) { 415 if (rep) { 416 log(LOG_INFO, "nfs send error %d for server %s\n",error, 417 rep->r_nmp->nm_mountp->mnt_stat.f_mntfromname); 418 /* 419 * Deal with errors for the client side. 420 */ 421 if (rep->r_flags & R_SOFTTERM) 422 error = EINTR; 423 else 424 rep->r_flags |= R_MUSTRESEND; 425 } else 426 log(LOG_INFO, "nfsd send error %d\n", error); 427 428 /* 429 * Handle any recoverable (soft) socket errors here. (???) 430 */ 431 if (error != EINTR && error != ERESTART && 432 error != EWOULDBLOCK && error != EPIPE) 433 error = 0; 434 } 435 return (error); 436 } 437 438 /* 439 * Receive a Sun RPC Request/Reply. For SOCK_DGRAM, the work is all 440 * done by soreceive(), but for SOCK_STREAM we must deal with the Record 441 * Mark and consolidate the data into a new mbuf list. 442 * nb: Sometimes TCP passes the data up to soreceive() in long lists of 443 * small mbufs. 444 * For SOCK_STREAM we must be very careful to read an entire record once 445 * we have read any of it, even if the system call has been interrupted. 446 */ 447 nfs_receive(rep, aname, mp) 448 register struct nfsreq *rep; 449 struct mbuf **aname; 450 struct mbuf **mp; 451 { 452 register struct socket *so; 453 struct uio auio; 454 struct iovec aio; 455 register struct mbuf *m; 456 struct mbuf *control; 457 u_long len; 458 struct mbuf **getnam; 459 int error, sotype, rcvflg; 460 struct proc *p = curproc; /* XXX */ 461 462 /* 463 * Set up arguments for soreceive() 464 */ 465 *mp = (struct mbuf *)0; 466 *aname = (struct mbuf *)0; 467 sotype = rep->r_nmp->nm_sotype; 468 469 /* 470 * For reliable protocols, lock against other senders/receivers 471 * in case a reconnect is necessary. 472 * For SOCK_STREAM, first get the Record Mark to find out how much 473 * more there is to get. 474 * We must lock the socket against other receivers 475 * until we have an entire rpc request/reply. 476 */ 477 if (sotype != SOCK_DGRAM) { 478 if (error = nfs_sndlock(&rep->r_nmp->nm_flag, rep)) 479 return (error); 480 tryagain: 481 /* 482 * Check for fatal errors and resending request. 483 */ 484 /* 485 * Ugh: If a reconnect attempt just happened, nm_so 486 * would have changed. NULL indicates a failed 487 * attempt that has essentially shut down this 488 * mount point. 489 */ 490 if (rep->r_mrep || (rep->r_flags & R_SOFTTERM)) { 491 nfs_sndunlock(&rep->r_nmp->nm_flag); 492 return (EINTR); 493 } 494 if ((so = rep->r_nmp->nm_so) == NULL) { 495 if (error = nfs_reconnect(rep)) { 496 nfs_sndunlock(&rep->r_nmp->nm_flag); 497 return (error); 498 } 499 goto tryagain; 500 } 501 while (rep->r_flags & R_MUSTRESEND) { 502 m = m_copym(rep->r_mreq, 0, M_COPYALL, M_WAIT); 503 nfsstats.rpcretries++; 504 if (error = nfs_send(so, rep->r_nmp->nm_nam, m, rep)) { 505 if (error == EINTR || error == ERESTART || 506 (error = nfs_reconnect(rep))) { 507 nfs_sndunlock(&rep->r_nmp->nm_flag); 508 return (error); 509 } 510 goto tryagain; 511 } 512 } 513 nfs_sndunlock(&rep->r_nmp->nm_flag); 514 if (sotype == SOCK_STREAM) { 515 aio.iov_base = (caddr_t) &len; 516 aio.iov_len = sizeof(u_long); 517 auio.uio_iov = &aio; 518 auio.uio_iovcnt = 1; 519 auio.uio_segflg = UIO_SYSSPACE; 520 auio.uio_rw = UIO_READ; 521 auio.uio_offset = 0; 522 auio.uio_resid = sizeof(u_long); 523 auio.uio_procp = p; 524 do { 525 rcvflg = MSG_WAITALL; 526 error = soreceive(so, (struct mbuf **)0, &auio, 527 (struct mbuf **)0, (struct mbuf **)0, &rcvflg); 528 if (error == EWOULDBLOCK && rep) { 529 if (rep->r_flags & R_SOFTTERM) 530 return (EINTR); 531 } 532 } while (error == EWOULDBLOCK); 533 if (!error && auio.uio_resid > 0) { 534 log(LOG_INFO, 535 "short receive (%d/%d) from nfs server %s\n", 536 sizeof(u_long) - auio.uio_resid, 537 sizeof(u_long), 538 rep->r_nmp->nm_mountp->mnt_stat.f_mntfromname); 539 error = EPIPE; 540 } 541 if (error) 542 goto errout; 543 len = ntohl(len) & ~0x80000000; 544 /* 545 * This is SERIOUS! We are out of sync with the sender 546 * and forcing a disconnect/reconnect is all I can do. 547 */ 548 if (len > NFS_MAXPACKET) { 549 log(LOG_ERR, "%s (%d) from nfs server %s\n", 550 "impossible packet length", 551 len, 552 rep->r_nmp->nm_mountp->mnt_stat.f_mntfromname); 553 error = EFBIG; 554 goto errout; 555 } 556 auio.uio_resid = len; 557 do { 558 rcvflg = MSG_WAITALL; 559 error = soreceive(so, (struct mbuf **)0, 560 &auio, mp, (struct mbuf **)0, &rcvflg); 561 } while (error == EWOULDBLOCK || error == EINTR || 562 error == ERESTART); 563 if (!error && auio.uio_resid > 0) { 564 log(LOG_INFO, 565 "short receive (%d/%d) from nfs server %s\n", 566 len - auio.uio_resid, len, 567 rep->r_nmp->nm_mountp->mnt_stat.f_mntfromname); 568 error = EPIPE; 569 } 570 } else { 571 /* 572 * NB: Since uio_resid is big, MSG_WAITALL is ignored 573 * and soreceive() will return when it has either a 574 * control msg or a data msg. 575 * We have no use for control msg., but must grab them 576 * and then throw them away so we know what is going 577 * on. 578 */ 579 auio.uio_resid = len = 100000000; /* Anything Big */ 580 auio.uio_procp = p; 581 do { 582 rcvflg = 0; 583 error = soreceive(so, (struct mbuf **)0, 584 &auio, mp, &control, &rcvflg); 585 if (control) 586 m_freem(control); 587 if (error == EWOULDBLOCK && rep) { 588 if (rep->r_flags & R_SOFTTERM) 589 return (EINTR); 590 } 591 } while (error == EWOULDBLOCK || 592 (!error && *mp == NULL && control)); 593 if ((rcvflg & MSG_EOR) == 0) 594 printf("Egad!!\n"); 595 if (!error && *mp == NULL) 596 error = EPIPE; 597 len -= auio.uio_resid; 598 } 599 errout: 600 if (error && error != EINTR && error != ERESTART) { 601 m_freem(*mp); 602 *mp = (struct mbuf *)0; 603 if (error != EPIPE) 604 log(LOG_INFO, 605 "receive error %d from nfs server %s\n", 606 error, 607 rep->r_nmp->nm_mountp->mnt_stat.f_mntfromname); 608 error = nfs_sndlock(&rep->r_nmp->nm_flag, rep); 609 if (!error) 610 error = nfs_reconnect(rep); 611 if (!error) 612 goto tryagain; 613 } 614 } else { 615 if ((so = rep->r_nmp->nm_so) == NULL) 616 return (EACCES); 617 if (so->so_state & SS_ISCONNECTED) 618 getnam = (struct mbuf **)0; 619 else 620 getnam = aname; 621 auio.uio_resid = len = 1000000; 622 auio.uio_procp = p; 623 do { 624 rcvflg = 0; 625 error = soreceive(so, getnam, &auio, mp, 626 (struct mbuf **)0, &rcvflg); 627 if (error == EWOULDBLOCK && 628 (rep->r_flags & R_SOFTTERM)) 629 return (EINTR); 630 } while (error == EWOULDBLOCK); 631 len -= auio.uio_resid; 632 } 633 if (error) { 634 m_freem(*mp); 635 *mp = (struct mbuf *)0; 636 } 637 /* 638 * Search for any mbufs that are not a multiple of 4 bytes long 639 * or with m_data not longword aligned. 640 * These could cause pointer alignment problems, so copy them to 641 * well aligned mbufs. 642 */ 643 nfs_realign(*mp, 5 * NFSX_UNSIGNED); 644 return (error); 645 } 646 647 /* 648 * Implement receipt of reply on a socket. 649 * We must search through the list of received datagrams matching them 650 * with outstanding requests using the xid, until ours is found. 651 */ 652 /* ARGSUSED */ 653 nfs_reply(myrep) 654 struct nfsreq *myrep; 655 { 656 register struct nfsreq *rep; 657 register struct nfsmount *nmp = myrep->r_nmp; 658 register long t1; 659 struct mbuf *mrep, *nam, *md; 660 u_long rxid, *tl; 661 caddr_t dpos, cp2; 662 int error; 663 664 /* 665 * Loop around until we get our own reply 666 */ 667 for (;;) { 668 /* 669 * Lock against other receivers so that I don't get stuck in 670 * sbwait() after someone else has received my reply for me. 671 * Also necessary for connection based protocols to avoid 672 * race conditions during a reconnect. 673 */ 674 if (error = nfs_rcvlock(myrep)) 675 return (error); 676 /* Already received, bye bye */ 677 if (myrep->r_mrep != NULL) { 678 nfs_rcvunlock(&nmp->nm_flag); 679 return (0); 680 } 681 /* 682 * Get the next Rpc reply off the socket 683 */ 684 error = nfs_receive(myrep, &nam, &mrep); 685 nfs_rcvunlock(&nmp->nm_flag); 686 if (error) { 687 688 /* 689 * Ignore routing errors on connectionless protocols?? 690 */ 691 if (NFSIGNORE_SOERROR(nmp->nm_soflags, error)) { 692 nmp->nm_so->so_error = 0; 693 if (myrep->r_flags & R_GETONEREP) 694 return (0); 695 continue; 696 } 697 return (error); 698 } 699 if (nam) 700 m_freem(nam); 701 702 /* 703 * Get the xid and check that it is an rpc reply 704 */ 705 md = mrep; 706 dpos = mtod(md, caddr_t); 707 nfsm_dissect(tl, u_long *, 2*NFSX_UNSIGNED); 708 rxid = *tl++; 709 if (*tl != rpc_reply) { 710 if (nmp->nm_flag & NFSMNT_NQNFS) { 711 if (nqnfs_callback(nmp, mrep, md, dpos)) 712 nfsstats.rpcinvalid++; 713 } else { 714 nfsstats.rpcinvalid++; 715 m_freem(mrep); 716 } 717 nfsmout: 718 if (myrep->r_flags & R_GETONEREP) 719 return (0); 720 continue; 721 } 722 723 /* 724 * Loop through the request list to match up the reply 725 * Iff no match, just drop the datagram 726 */ 727 for (rep = nfs_reqq.tqh_first; rep != 0; 728 rep = rep->r_chain.tqe_next) { 729 if (rep->r_mrep == NULL && rxid == rep->r_xid) { 730 /* Found it.. */ 731 rep->r_mrep = mrep; 732 rep->r_md = md; 733 rep->r_dpos = dpos; 734 if (nfsrtton) { 735 struct rttl *rt; 736 737 rt = &nfsrtt.rttl[nfsrtt.pos]; 738 rt->proc = rep->r_procnum; 739 rt->rto = NFS_RTO(nmp, proct[rep->r_procnum]); 740 rt->sent = nmp->nm_sent; 741 rt->cwnd = nmp->nm_cwnd; 742 rt->srtt = nmp->nm_srtt[proct[rep->r_procnum] - 1]; 743 rt->sdrtt = nmp->nm_sdrtt[proct[rep->r_procnum] - 1]; 744 rt->fsid = nmp->nm_mountp->mnt_stat.f_fsid; 745 rt->tstamp = time; 746 if (rep->r_flags & R_TIMING) 747 rt->rtt = rep->r_rtt; 748 else 749 rt->rtt = 1000000; 750 nfsrtt.pos = (nfsrtt.pos + 1) % NFSRTTLOGSIZ; 751 } 752 /* 753 * Update congestion window. 754 * Do the additive increase of 755 * one rpc/rtt. 756 */ 757 if (nmp->nm_cwnd <= nmp->nm_sent) { 758 nmp->nm_cwnd += 759 (NFS_CWNDSCALE * NFS_CWNDSCALE + 760 (nmp->nm_cwnd >> 1)) / nmp->nm_cwnd; 761 if (nmp->nm_cwnd > NFS_MAXCWND) 762 nmp->nm_cwnd = NFS_MAXCWND; 763 } 764 rep->r_flags &= ~R_SENT; 765 nmp->nm_sent -= NFS_CWNDSCALE; 766 /* 767 * Update rtt using a gain of 0.125 on the mean 768 * and a gain of 0.25 on the deviation. 769 */ 770 if (rep->r_flags & R_TIMING) { 771 /* 772 * Since the timer resolution of 773 * NFS_HZ is so course, it can often 774 * result in r_rtt == 0. Since 775 * r_rtt == N means that the actual 776 * rtt is between N+dt and N+2-dt ticks, 777 * add 1. 778 */ 779 t1 = rep->r_rtt + 1; 780 t1 -= (NFS_SRTT(rep) >> 3); 781 NFS_SRTT(rep) += t1; 782 if (t1 < 0) 783 t1 = -t1; 784 t1 -= (NFS_SDRTT(rep) >> 2); 785 NFS_SDRTT(rep) += t1; 786 } 787 nmp->nm_timeouts = 0; 788 break; 789 } 790 } 791 /* 792 * If not matched to a request, drop it. 793 * If it's mine, get out. 794 */ 795 if (rep == 0) { 796 nfsstats.rpcunexpected++; 797 m_freem(mrep); 798 } else if (rep == myrep) { 799 if (rep->r_mrep == NULL) 800 panic("nfsreply nil"); 801 return (0); 802 } 803 if (myrep->r_flags & R_GETONEREP) 804 return (0); 805 } 806 } 807 808 /* 809 * nfs_request - goes something like this 810 * - fill in request struct 811 * - links it into list 812 * - calls nfs_send() for first transmit 813 * - calls nfs_receive() to get reply 814 * - break down rpc header and return with nfs reply pointed to 815 * by mrep or error 816 * nb: always frees up mreq mbuf list 817 */ 818 nfs_request(vp, mrest, procnum, procp, cred, mrp, mdp, dposp) 819 struct vnode *vp; 820 struct mbuf *mrest; 821 int procnum; 822 struct proc *procp; 823 struct ucred *cred; 824 struct mbuf **mrp; 825 struct mbuf **mdp; 826 caddr_t *dposp; 827 { 828 register struct mbuf *m, *mrep; 829 register struct nfsreq *rep; 830 register u_long *tl; 831 register int i; 832 struct nfsmount *nmp; 833 struct mbuf *md, *mheadend; 834 struct nfsreq *reph; 835 struct nfsnode *np; 836 time_t reqtime, waituntil; 837 caddr_t dpos, cp2; 838 int t1, nqlflag, cachable, s, error = 0, mrest_len, auth_len, auth_type; 839 int trylater_delay = NQ_TRYLATERDEL, trylater_cnt = 0, failed_auth = 0; 840 u_long xid; 841 u_quad_t frev; 842 char *auth_str; 843 844 nmp = VFSTONFS(vp->v_mount); 845 MALLOC(rep, struct nfsreq *, sizeof(struct nfsreq), M_NFSREQ, M_WAITOK); 846 rep->r_nmp = nmp; 847 rep->r_vp = vp; 848 rep->r_procp = procp; 849 rep->r_procnum = procnum; 850 i = 0; 851 m = mrest; 852 while (m) { 853 i += m->m_len; 854 m = m->m_next; 855 } 856 mrest_len = i; 857 858 /* 859 * Get the RPC header with authorization. 860 */ 861 kerbauth: 862 auth_str = (char *)0; 863 if (nmp->nm_flag & NFSMNT_KERB) { 864 if (failed_auth) { 865 error = nfs_getauth(nmp, rep, cred, &auth_type, 866 &auth_str, &auth_len); 867 if (error) { 868 free((caddr_t)rep, M_NFSREQ); 869 m_freem(mrest); 870 return (error); 871 } 872 } else { 873 auth_type = RPCAUTH_UNIX; 874 auth_len = 5 * NFSX_UNSIGNED; 875 } 876 } else { 877 auth_type = RPCAUTH_UNIX; 878 if (cred->cr_ngroups < 1) 879 panic("nfsreq nogrps"); 880 auth_len = ((((cred->cr_ngroups - 1) > nmp->nm_numgrps) ? 881 nmp->nm_numgrps : (cred->cr_ngroups - 1)) << 2) + 882 5 * NFSX_UNSIGNED; 883 } 884 m = nfsm_rpchead(cred, (nmp->nm_flag & NFSMNT_NQNFS), procnum, 885 auth_type, auth_len, auth_str, mrest, mrest_len, &mheadend, &xid); 886 if (auth_str) 887 free(auth_str, M_TEMP); 888 889 /* 890 * For stream protocols, insert a Sun RPC Record Mark. 891 */ 892 if (nmp->nm_sotype == SOCK_STREAM) { 893 M_PREPEND(m, NFSX_UNSIGNED, M_WAIT); 894 *mtod(m, u_long *) = htonl(0x80000000 | 895 (m->m_pkthdr.len - NFSX_UNSIGNED)); 896 } 897 rep->r_mreq = m; 898 rep->r_xid = xid; 899 tryagain: 900 if (nmp->nm_flag & NFSMNT_SOFT) 901 rep->r_retry = nmp->nm_retry; 902 else 903 rep->r_retry = NFS_MAXREXMIT + 1; /* past clip limit */ 904 rep->r_rtt = rep->r_rexmit = 0; 905 if (proct[procnum] > 0) 906 rep->r_flags = R_TIMING; 907 else 908 rep->r_flags = 0; 909 rep->r_mrep = NULL; 910 911 /* 912 * Do the client side RPC. 913 */ 914 nfsstats.rpcrequests++; 915 /* 916 * Chain request into list of outstanding requests. Be sure 917 * to put it LAST so timer finds oldest requests first. 918 */ 919 s = splsoftclock(); 920 TAILQ_INSERT_TAIL(&nfs_reqq, rep, r_chain); 921 922 /* Get send time for nqnfs */ 923 reqtime = time.tv_sec; 924 925 /* 926 * If backing off another request or avoiding congestion, don't 927 * send this one now but let timer do it. If not timing a request, 928 * do it now. 929 */ 930 if (nmp->nm_so && (nmp->nm_sotype != SOCK_DGRAM || 931 (nmp->nm_flag & NFSMNT_DUMBTIMR) || 932 nmp->nm_sent < nmp->nm_cwnd)) { 933 splx(s); 934 if (nmp->nm_soflags & PR_CONNREQUIRED) 935 error = nfs_sndlock(&nmp->nm_flag, rep); 936 if (!error) { 937 m = m_copym(m, 0, M_COPYALL, M_WAIT); 938 error = nfs_send(nmp->nm_so, nmp->nm_nam, m, rep); 939 if (nmp->nm_soflags & PR_CONNREQUIRED) 940 nfs_sndunlock(&nmp->nm_flag); 941 } 942 if (!error && (rep->r_flags & R_MUSTRESEND) == 0) { 943 nmp->nm_sent += NFS_CWNDSCALE; 944 rep->r_flags |= R_SENT; 945 } 946 } else { 947 splx(s); 948 rep->r_rtt = -1; 949 } 950 951 /* 952 * Wait for the reply from our send or the timer's. 953 */ 954 if (!error || error == EPIPE) 955 error = nfs_reply(rep); 956 957 /* 958 * RPC done, unlink the request. 959 */ 960 s = splsoftclock(); 961 TAILQ_REMOVE(&nfs_reqq, rep, r_chain); 962 splx(s); 963 964 /* 965 * Decrement the outstanding request count. 966 */ 967 if (rep->r_flags & R_SENT) { 968 rep->r_flags &= ~R_SENT; /* paranoia */ 969 nmp->nm_sent -= NFS_CWNDSCALE; 970 } 971 972 /* 973 * If there was a successful reply and a tprintf msg. 974 * tprintf a response. 975 */ 976 if (!error && (rep->r_flags & R_TPRINTFMSG)) 977 nfs_msg(rep->r_procp, nmp->nm_mountp->mnt_stat.f_mntfromname, 978 "is alive again"); 979 mrep = rep->r_mrep; 980 md = rep->r_md; 981 dpos = rep->r_dpos; 982 if (error) { 983 m_freem(rep->r_mreq); 984 free((caddr_t)rep, M_NFSREQ); 985 return (error); 986 } 987 988 /* 989 * break down the rpc header and check if ok 990 */ 991 nfsm_dissect(tl, u_long *, 3*NFSX_UNSIGNED); 992 if (*tl++ == rpc_msgdenied) { 993 if (*tl == rpc_mismatch) 994 error = EOPNOTSUPP; 995 else if ((nmp->nm_flag & NFSMNT_KERB) && *tl++ == rpc_autherr) { 996 if (*tl == rpc_rejectedcred && failed_auth == 0) { 997 failed_auth++; 998 mheadend->m_next = (struct mbuf *)0; 999 m_freem(mrep); 1000 m_freem(rep->r_mreq); 1001 goto kerbauth; 1002 } else 1003 error = EAUTH; 1004 } else 1005 error = EACCES; 1006 m_freem(mrep); 1007 m_freem(rep->r_mreq); 1008 free((caddr_t)rep, M_NFSREQ); 1009 return (error); 1010 } 1011 1012 /* 1013 * skip over the auth_verf, someday we may want to cache auth_short's 1014 * for nfs_reqhead(), but for now just dump it 1015 */ 1016 if (*++tl != 0) { 1017 i = nfsm_rndup(fxdr_unsigned(long, *tl)); 1018 nfsm_adv(i); 1019 } 1020 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); 1021 /* 0 == ok */ 1022 if (*tl == 0) { 1023 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); 1024 if (*tl != 0) { 1025 error = fxdr_unsigned(int, *tl); 1026 m_freem(mrep); 1027 if ((nmp->nm_flag & NFSMNT_NQNFS) && 1028 error == NQNFS_TRYLATER) { 1029 error = 0; 1030 waituntil = time.tv_sec + trylater_delay; 1031 while (time.tv_sec < waituntil) 1032 (void) tsleep((caddr_t)&lbolt, 1033 PSOCK, "nqnfstry", 0); 1034 trylater_delay *= nfs_backoff[trylater_cnt]; 1035 if (trylater_cnt < 7) 1036 trylater_cnt++; 1037 goto tryagain; 1038 } 1039 1040 /* 1041 * If the File Handle was stale, invalidate the 1042 * lookup cache, just in case. 1043 */ 1044 if (error == ESTALE) 1045 cache_purge(vp); 1046 m_freem(rep->r_mreq); 1047 free((caddr_t)rep, M_NFSREQ); 1048 return (error); 1049 } 1050 1051 /* 1052 * For nqnfs, get any lease in reply 1053 */ 1054 if (nmp->nm_flag & NFSMNT_NQNFS) { 1055 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); 1056 if (*tl) { 1057 np = VTONFS(vp); 1058 nqlflag = fxdr_unsigned(int, *tl); 1059 nfsm_dissect(tl, u_long *, 4*NFSX_UNSIGNED); 1060 cachable = fxdr_unsigned(int, *tl++); 1061 reqtime += fxdr_unsigned(int, *tl++); 1062 if (reqtime > time.tv_sec) { 1063 fxdr_hyper(tl, &frev); 1064 nqnfs_clientlease(nmp, np, nqlflag, 1065 cachable, reqtime, frev); 1066 } 1067 } 1068 } 1069 *mrp = mrep; 1070 *mdp = md; 1071 *dposp = dpos; 1072 m_freem(rep->r_mreq); 1073 FREE((caddr_t)rep, M_NFSREQ); 1074 return (0); 1075 } 1076 m_freem(mrep); 1077 m_freem(rep->r_mreq); 1078 free((caddr_t)rep, M_NFSREQ); 1079 error = EPROTONOSUPPORT; 1080 nfsmout: 1081 return (error); 1082 } 1083 1084 /* 1085 * Generate the rpc reply header 1086 * siz arg. is used to decide if adding a cluster is worthwhile 1087 */ 1088 nfs_rephead(siz, nd, err, cache, frev, mrq, mbp, bposp) 1089 int siz; 1090 struct nfsd *nd; 1091 int err; 1092 int cache; 1093 u_quad_t *frev; 1094 struct mbuf **mrq; 1095 struct mbuf **mbp; 1096 caddr_t *bposp; 1097 { 1098 register u_long *tl; 1099 register struct mbuf *mreq; 1100 caddr_t bpos; 1101 struct mbuf *mb, *mb2; 1102 1103 MGETHDR(mreq, M_WAIT, MT_DATA); 1104 mb = mreq; 1105 /* 1106 * If this is a big reply, use a cluster else 1107 * try and leave leading space for the lower level headers. 1108 */ 1109 siz += RPC_REPLYSIZ; 1110 if (siz >= MINCLSIZE) { 1111 MCLGET(mreq, M_WAIT); 1112 } else 1113 mreq->m_data += max_hdr; 1114 tl = mtod(mreq, u_long *); 1115 mreq->m_len = 6*NFSX_UNSIGNED; 1116 bpos = ((caddr_t)tl)+mreq->m_len; 1117 *tl++ = nd->nd_retxid; 1118 *tl++ = rpc_reply; 1119 if (err == ERPCMISMATCH || err == NQNFS_AUTHERR) { 1120 *tl++ = rpc_msgdenied; 1121 if (err == NQNFS_AUTHERR) { 1122 *tl++ = rpc_autherr; 1123 *tl = rpc_rejectedcred; 1124 mreq->m_len -= NFSX_UNSIGNED; 1125 bpos -= NFSX_UNSIGNED; 1126 } else { 1127 *tl++ = rpc_mismatch; 1128 *tl++ = txdr_unsigned(2); 1129 *tl = txdr_unsigned(2); 1130 } 1131 } else { 1132 *tl++ = rpc_msgaccepted; 1133 *tl++ = 0; 1134 *tl++ = 0; 1135 switch (err) { 1136 case EPROGUNAVAIL: 1137 *tl = txdr_unsigned(RPC_PROGUNAVAIL); 1138 break; 1139 case EPROGMISMATCH: 1140 *tl = txdr_unsigned(RPC_PROGMISMATCH); 1141 nfsm_build(tl, u_long *, 2*NFSX_UNSIGNED); 1142 *tl++ = txdr_unsigned(2); 1143 *tl = txdr_unsigned(2); /* someday 3 */ 1144 break; 1145 case EPROCUNAVAIL: 1146 *tl = txdr_unsigned(RPC_PROCUNAVAIL); 1147 break; 1148 default: 1149 *tl = 0; 1150 if (err != VNOVAL) { 1151 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 1152 if (err) 1153 *tl = txdr_unsigned(nfsrv_errmap[err - 1]); 1154 else 1155 *tl = 0; 1156 } 1157 break; 1158 }; 1159 } 1160 1161 /* 1162 * For nqnfs, piggyback lease as requested. 1163 */ 1164 if (nd->nd_nqlflag != NQL_NOVAL && err == 0) { 1165 if (nd->nd_nqlflag) { 1166 nfsm_build(tl, u_long *, 5*NFSX_UNSIGNED); 1167 *tl++ = txdr_unsigned(nd->nd_nqlflag); 1168 *tl++ = txdr_unsigned(cache); 1169 *tl++ = txdr_unsigned(nd->nd_duration); 1170 txdr_hyper(frev, tl); 1171 } else { 1172 if (nd->nd_nqlflag != 0) 1173 panic("nqreph"); 1174 nfsm_build(tl, u_long *, NFSX_UNSIGNED); 1175 *tl = 0; 1176 } 1177 } 1178 *mrq = mreq; 1179 *mbp = mb; 1180 *bposp = bpos; 1181 if (err != 0 && err != VNOVAL) 1182 nfsstats.srvrpc_errs++; 1183 return (0); 1184 } 1185 1186 /* 1187 * Nfs timer routine 1188 * Scan the nfsreq list and retranmit any requests that have timed out 1189 * To avoid retransmission attempts on STREAM sockets (in the future) make 1190 * sure to set the r_retry field to 0 (implies nm_retry == 0). 1191 */ 1192 void 1193 nfs_timer(arg) 1194 void *arg; 1195 { 1196 register struct nfsreq *rep; 1197 register struct mbuf *m; 1198 register struct socket *so; 1199 register struct nfsmount *nmp; 1200 register int timeo; 1201 static long lasttime = 0; 1202 int s, error; 1203 1204 s = splnet(); 1205 for (rep = nfs_reqq.tqh_first; rep != 0; rep = rep->r_chain.tqe_next) { 1206 nmp = rep->r_nmp; 1207 if (rep->r_mrep || (rep->r_flags & R_SOFTTERM)) 1208 continue; 1209 if (nfs_sigintr(nmp, rep, rep->r_procp)) { 1210 rep->r_flags |= R_SOFTTERM; 1211 continue; 1212 } 1213 if (rep->r_rtt >= 0) { 1214 rep->r_rtt++; 1215 if (nmp->nm_flag & NFSMNT_DUMBTIMR) 1216 timeo = nmp->nm_timeo; 1217 else 1218 timeo = NFS_RTO(nmp, proct[rep->r_procnum]); 1219 if (nmp->nm_timeouts > 0) 1220 timeo *= nfs_backoff[nmp->nm_timeouts - 1]; 1221 if (rep->r_rtt <= timeo) 1222 continue; 1223 if (nmp->nm_timeouts < 8) 1224 nmp->nm_timeouts++; 1225 } 1226 /* 1227 * Check for server not responding 1228 */ 1229 if ((rep->r_flags & R_TPRINTFMSG) == 0 && 1230 rep->r_rexmit > nmp->nm_deadthresh) { 1231 nfs_msg(rep->r_procp, 1232 nmp->nm_mountp->mnt_stat.f_mntfromname, 1233 "not responding"); 1234 rep->r_flags |= R_TPRINTFMSG; 1235 } 1236 if (rep->r_rexmit >= rep->r_retry) { /* too many */ 1237 nfsstats.rpctimeouts++; 1238 rep->r_flags |= R_SOFTTERM; 1239 continue; 1240 } 1241 if (nmp->nm_sotype != SOCK_DGRAM) { 1242 if (++rep->r_rexmit > NFS_MAXREXMIT) 1243 rep->r_rexmit = NFS_MAXREXMIT; 1244 continue; 1245 } 1246 if ((so = nmp->nm_so) == NULL) 1247 continue; 1248 1249 /* 1250 * If there is enough space and the window allows.. 1251 * Resend it 1252 * Set r_rtt to -1 in case we fail to send it now. 1253 */ 1254 rep->r_rtt = -1; 1255 if (sbspace(&so->so_snd) >= rep->r_mreq->m_pkthdr.len && 1256 ((nmp->nm_flag & NFSMNT_DUMBTIMR) || 1257 (rep->r_flags & R_SENT) || 1258 nmp->nm_sent < nmp->nm_cwnd) && 1259 (m = m_copym(rep->r_mreq, 0, M_COPYALL, M_DONTWAIT))){ 1260 if ((nmp->nm_flag & NFSMNT_NOCONN) == 0) 1261 error = (*so->so_proto->pr_usrreq)(so, PRU_SEND, m, 1262 (struct mbuf *)0, (struct mbuf *)0); 1263 else 1264 error = (*so->so_proto->pr_usrreq)(so, PRU_SEND, m, 1265 nmp->nm_nam, (struct mbuf *)0); 1266 if (error) { 1267 if (NFSIGNORE_SOERROR(nmp->nm_soflags, error)) 1268 so->so_error = 0; 1269 } else { 1270 /* 1271 * Iff first send, start timing 1272 * else turn timing off, backoff timer 1273 * and divide congestion window by 2. 1274 */ 1275 if (rep->r_flags & R_SENT) { 1276 rep->r_flags &= ~R_TIMING; 1277 if (++rep->r_rexmit > NFS_MAXREXMIT) 1278 rep->r_rexmit = NFS_MAXREXMIT; 1279 nmp->nm_cwnd >>= 1; 1280 if (nmp->nm_cwnd < NFS_CWNDSCALE) 1281 nmp->nm_cwnd = NFS_CWNDSCALE; 1282 nfsstats.rpcretries++; 1283 } else { 1284 rep->r_flags |= R_SENT; 1285 nmp->nm_sent += NFS_CWNDSCALE; 1286 } 1287 rep->r_rtt = 0; 1288 } 1289 } 1290 } 1291 1292 /* 1293 * Call the nqnfs server timer once a second to handle leases. 1294 */ 1295 if (lasttime != time.tv_sec) { 1296 lasttime = time.tv_sec; 1297 nqnfs_serverd(); 1298 } 1299 splx(s); 1300 timeout(nfs_timer, (void *)0, hz / NFS_HZ); 1301 } 1302 1303 /* 1304 * Test for a termination condition pending on the process. 1305 * This is used for NFSMNT_INT mounts. 1306 */ 1307 nfs_sigintr(nmp, rep, p) 1308 struct nfsmount *nmp; 1309 struct nfsreq *rep; 1310 register struct proc *p; 1311 { 1312 1313 if (rep && (rep->r_flags & R_SOFTTERM)) 1314 return (EINTR); 1315 if (!(nmp->nm_flag & NFSMNT_INT)) 1316 return (0); 1317 if (p && p->p_siglist && 1318 (((p->p_siglist & ~p->p_sigmask) & ~p->p_sigignore) & 1319 NFSINT_SIGMASK)) 1320 return (EINTR); 1321 return (0); 1322 } 1323 1324 /* 1325 * Lock a socket against others. 1326 * Necessary for STREAM sockets to ensure you get an entire rpc request/reply 1327 * and also to avoid race conditions between the processes with nfs requests 1328 * in progress when a reconnect is necessary. 1329 */ 1330 nfs_sndlock(flagp, rep) 1331 register int *flagp; 1332 struct nfsreq *rep; 1333 { 1334 struct proc *p; 1335 int slpflag = 0, slptimeo = 0; 1336 1337 if (rep) { 1338 p = rep->r_procp; 1339 if (rep->r_nmp->nm_flag & NFSMNT_INT) 1340 slpflag = PCATCH; 1341 } else 1342 p = (struct proc *)0; 1343 while (*flagp & NFSMNT_SNDLOCK) { 1344 if (nfs_sigintr(rep->r_nmp, rep, p)) 1345 return (EINTR); 1346 *flagp |= NFSMNT_WANTSND; 1347 (void) tsleep((caddr_t)flagp, slpflag | (PZERO - 1), "nfsndlck", 1348 slptimeo); 1349 if (slpflag == PCATCH) { 1350 slpflag = 0; 1351 slptimeo = 2 * hz; 1352 } 1353 } 1354 *flagp |= NFSMNT_SNDLOCK; 1355 return (0); 1356 } 1357 1358 /* 1359 * Unlock the stream socket for others. 1360 */ 1361 void 1362 nfs_sndunlock(flagp) 1363 register int *flagp; 1364 { 1365 1366 if ((*flagp & NFSMNT_SNDLOCK) == 0) 1367 panic("nfs sndunlock"); 1368 *flagp &= ~NFSMNT_SNDLOCK; 1369 if (*flagp & NFSMNT_WANTSND) { 1370 *flagp &= ~NFSMNT_WANTSND; 1371 wakeup((caddr_t)flagp); 1372 } 1373 } 1374 1375 nfs_rcvlock(rep) 1376 register struct nfsreq *rep; 1377 { 1378 register int *flagp = &rep->r_nmp->nm_flag; 1379 int slpflag, slptimeo = 0; 1380 1381 if (*flagp & NFSMNT_INT) 1382 slpflag = PCATCH; 1383 else 1384 slpflag = 0; 1385 while (*flagp & NFSMNT_RCVLOCK) { 1386 if (nfs_sigintr(rep->r_nmp, rep, rep->r_procp)) 1387 return (EINTR); 1388 *flagp |= NFSMNT_WANTRCV; 1389 (void) tsleep((caddr_t)flagp, slpflag | (PZERO - 1), "nfsrcvlk", 1390 slptimeo); 1391 if (slpflag == PCATCH) { 1392 slpflag = 0; 1393 slptimeo = 2 * hz; 1394 } 1395 } 1396 *flagp |= NFSMNT_RCVLOCK; 1397 return (0); 1398 } 1399 1400 /* 1401 * Unlock the stream socket for others. 1402 */ 1403 void 1404 nfs_rcvunlock(flagp) 1405 register int *flagp; 1406 { 1407 1408 if ((*flagp & NFSMNT_RCVLOCK) == 0) 1409 panic("nfs rcvunlock"); 1410 *flagp &= ~NFSMNT_RCVLOCK; 1411 if (*flagp & NFSMNT_WANTRCV) { 1412 *flagp &= ~NFSMNT_WANTRCV; 1413 wakeup((caddr_t)flagp); 1414 } 1415 } 1416 1417 /* 1418 * Check for badly aligned mbuf data areas and 1419 * realign data in an mbuf list by copying the data areas up, as required. 1420 */ 1421 void 1422 nfs_realign(m, hsiz) 1423 register struct mbuf *m; 1424 int hsiz; 1425 { 1426 register struct mbuf *m2; 1427 register int siz, mlen, olen; 1428 register caddr_t tcp, fcp; 1429 struct mbuf *mnew; 1430 1431 while (m) { 1432 /* 1433 * This never happens for UDP, rarely happens for TCP 1434 * but frequently happens for iso transport. 1435 */ 1436 if ((m->m_len & 0x3) || (mtod(m, int) & 0x3)) { 1437 olen = m->m_len; 1438 fcp = mtod(m, caddr_t); 1439 if ((int)fcp & 0x3) { 1440 m->m_flags &= ~M_PKTHDR; 1441 if (m->m_flags & M_EXT) 1442 m->m_data = m->m_ext.ext_buf + 1443 ((m->m_ext.ext_size - olen) & ~0x3); 1444 else 1445 m->m_data = m->m_dat; 1446 } 1447 m->m_len = 0; 1448 tcp = mtod(m, caddr_t); 1449 mnew = m; 1450 m2 = m->m_next; 1451 1452 /* 1453 * If possible, only put the first invariant part 1454 * of the RPC header in the first mbuf. 1455 */ 1456 mlen = M_TRAILINGSPACE(m); 1457 if (olen <= hsiz && mlen > hsiz) 1458 mlen = hsiz; 1459 1460 /* 1461 * Loop through the mbuf list consolidating data. 1462 */ 1463 while (m) { 1464 while (olen > 0) { 1465 if (mlen == 0) { 1466 m2->m_flags &= ~M_PKTHDR; 1467 if (m2->m_flags & M_EXT) 1468 m2->m_data = m2->m_ext.ext_buf; 1469 else 1470 m2->m_data = m2->m_dat; 1471 m2->m_len = 0; 1472 mlen = M_TRAILINGSPACE(m2); 1473 tcp = mtod(m2, caddr_t); 1474 mnew = m2; 1475 m2 = m2->m_next; 1476 } 1477 siz = min(mlen, olen); 1478 if (tcp != fcp) 1479 bcopy(fcp, tcp, siz); 1480 mnew->m_len += siz; 1481 mlen -= siz; 1482 olen -= siz; 1483 tcp += siz; 1484 fcp += siz; 1485 } 1486 m = m->m_next; 1487 if (m) { 1488 olen = m->m_len; 1489 fcp = mtod(m, caddr_t); 1490 } 1491 } 1492 1493 /* 1494 * Finally, set m_len == 0 for any trailing mbufs that have 1495 * been copied out of. 1496 */ 1497 while (m2) { 1498 m2->m_len = 0; 1499 m2 = m2->m_next; 1500 } 1501 return; 1502 } 1503 m = m->m_next; 1504 } 1505 } 1506 1507 /* 1508 * Socket upcall routine for the nfsd sockets. 1509 * The caddr_t arg is a pointer to the "struct nfssvc_sock". 1510 * Essentially do as much as possible non-blocking, else punt and it will 1511 * be called with M_WAIT from an nfsd. 1512 */ 1513 void 1514 nfsrv_rcv(so, arg, waitflag) 1515 struct socket *so; 1516 caddr_t arg; 1517 int waitflag; 1518 { 1519 register struct nfssvc_sock *slp = (struct nfssvc_sock *)arg; 1520 register struct mbuf *m; 1521 struct mbuf *mp, *nam; 1522 struct uio auio; 1523 int flags, error; 1524 1525 if ((slp->ns_flag & SLP_VALID) == 0) 1526 return; 1527 #ifdef notdef 1528 /* 1529 * Define this to test for nfsds handling this under heavy load. 1530 */ 1531 if (waitflag == M_DONTWAIT) { 1532 slp->ns_flag |= SLP_NEEDQ; goto dorecs; 1533 } 1534 #endif 1535 auio.uio_procp = NULL; 1536 if (so->so_type == SOCK_STREAM) { 1537 /* 1538 * If there are already records on the queue, defer soreceive() 1539 * to an nfsd so that there is feedback to the TCP layer that 1540 * the nfs servers are heavily loaded. 1541 */ 1542 if (slp->ns_rec && waitflag == M_DONTWAIT) { 1543 slp->ns_flag |= SLP_NEEDQ; 1544 goto dorecs; 1545 } 1546 1547 /* 1548 * Do soreceive(). 1549 */ 1550 auio.uio_resid = 1000000000; 1551 flags = MSG_DONTWAIT; 1552 error = soreceive(so, &nam, &auio, &mp, (struct mbuf **)0, &flags); 1553 if (error || mp == (struct mbuf *)0) { 1554 if (error == EWOULDBLOCK) 1555 slp->ns_flag |= SLP_NEEDQ; 1556 else 1557 slp->ns_flag |= SLP_DISCONN; 1558 goto dorecs; 1559 } 1560 m = mp; 1561 if (slp->ns_rawend) { 1562 slp->ns_rawend->m_next = m; 1563 slp->ns_cc += 1000000000 - auio.uio_resid; 1564 } else { 1565 slp->ns_raw = m; 1566 slp->ns_cc = 1000000000 - auio.uio_resid; 1567 } 1568 while (m->m_next) 1569 m = m->m_next; 1570 slp->ns_rawend = m; 1571 1572 /* 1573 * Now try and parse record(s) out of the raw stream data. 1574 */ 1575 if (error = nfsrv_getstream(slp, waitflag)) { 1576 if (error == EPERM) 1577 slp->ns_flag |= SLP_DISCONN; 1578 else 1579 slp->ns_flag |= SLP_NEEDQ; 1580 } 1581 } else { 1582 do { 1583 auio.uio_resid = 1000000000; 1584 flags = MSG_DONTWAIT; 1585 error = soreceive(so, &nam, &auio, &mp, 1586 (struct mbuf **)0, &flags); 1587 if (mp) { 1588 nfs_realign(mp, 10 * NFSX_UNSIGNED); 1589 if (nam) { 1590 m = nam; 1591 m->m_next = mp; 1592 } else 1593 m = mp; 1594 if (slp->ns_recend) 1595 slp->ns_recend->m_nextpkt = m; 1596 else 1597 slp->ns_rec = m; 1598 slp->ns_recend = m; 1599 m->m_nextpkt = (struct mbuf *)0; 1600 } 1601 if (error) { 1602 if ((so->so_proto->pr_flags & PR_CONNREQUIRED) 1603 && error != EWOULDBLOCK) { 1604 slp->ns_flag |= SLP_DISCONN; 1605 goto dorecs; 1606 } 1607 } 1608 } while (mp); 1609 } 1610 1611 /* 1612 * Now try and process the request records, non-blocking. 1613 */ 1614 dorecs: 1615 if (waitflag == M_DONTWAIT && 1616 (slp->ns_rec || (slp->ns_flag & (SLP_NEEDQ | SLP_DISCONN)))) 1617 nfsrv_wakenfsd(slp); 1618 } 1619 1620 /* 1621 * Try and extract an RPC request from the mbuf data list received on a 1622 * stream socket. The "waitflag" argument indicates whether or not it 1623 * can sleep. 1624 */ 1625 nfsrv_getstream(slp, waitflag) 1626 register struct nfssvc_sock *slp; 1627 int waitflag; 1628 { 1629 register struct mbuf *m; 1630 register char *cp1, *cp2; 1631 register int len; 1632 struct mbuf *om, *m2, *recm; 1633 u_long recmark; 1634 1635 if (slp->ns_flag & SLP_GETSTREAM) 1636 panic("nfs getstream"); 1637 slp->ns_flag |= SLP_GETSTREAM; 1638 for (;;) { 1639 if (slp->ns_reclen == 0) { 1640 if (slp->ns_cc < NFSX_UNSIGNED) { 1641 slp->ns_flag &= ~SLP_GETSTREAM; 1642 return (0); 1643 } 1644 m = slp->ns_raw; 1645 if (m->m_len >= NFSX_UNSIGNED) { 1646 bcopy(mtod(m, caddr_t), (caddr_t)&recmark, NFSX_UNSIGNED); 1647 m->m_data += NFSX_UNSIGNED; 1648 m->m_len -= NFSX_UNSIGNED; 1649 } else { 1650 cp1 = (caddr_t)&recmark; 1651 cp2 = mtod(m, caddr_t); 1652 while (cp1 < ((caddr_t)&recmark) + NFSX_UNSIGNED) { 1653 while (m->m_len == 0) { 1654 m = m->m_next; 1655 cp2 = mtod(m, caddr_t); 1656 } 1657 *cp1++ = *cp2++; 1658 m->m_data++; 1659 m->m_len--; 1660 } 1661 } 1662 slp->ns_cc -= NFSX_UNSIGNED; 1663 slp->ns_reclen = ntohl(recmark) & ~0x80000000; 1664 if (slp->ns_reclen < NFS_MINPACKET || slp->ns_reclen > NFS_MAXPACKET) { 1665 slp->ns_flag &= ~SLP_GETSTREAM; 1666 return (EPERM); 1667 } 1668 } 1669 1670 /* 1671 * Now get the record part. 1672 */ 1673 if (slp->ns_cc == slp->ns_reclen) { 1674 recm = slp->ns_raw; 1675 slp->ns_raw = slp->ns_rawend = (struct mbuf *)0; 1676 slp->ns_cc = slp->ns_reclen = 0; 1677 } else if (slp->ns_cc > slp->ns_reclen) { 1678 len = 0; 1679 m = slp->ns_raw; 1680 om = (struct mbuf *)0; 1681 while (len < slp->ns_reclen) { 1682 if ((len + m->m_len) > slp->ns_reclen) { 1683 m2 = m_copym(m, 0, slp->ns_reclen - len, 1684 waitflag); 1685 if (m2) { 1686 if (om) { 1687 om->m_next = m2; 1688 recm = slp->ns_raw; 1689 } else 1690 recm = m2; 1691 m->m_data += slp->ns_reclen - len; 1692 m->m_len -= slp->ns_reclen - len; 1693 len = slp->ns_reclen; 1694 } else { 1695 slp->ns_flag &= ~SLP_GETSTREAM; 1696 return (EWOULDBLOCK); 1697 } 1698 } else if ((len + m->m_len) == slp->ns_reclen) { 1699 om = m; 1700 len += m->m_len; 1701 m = m->m_next; 1702 recm = slp->ns_raw; 1703 om->m_next = (struct mbuf *)0; 1704 } else { 1705 om = m; 1706 len += m->m_len; 1707 m = m->m_next; 1708 } 1709 } 1710 slp->ns_raw = m; 1711 slp->ns_cc -= len; 1712 slp->ns_reclen = 0; 1713 } else { 1714 slp->ns_flag &= ~SLP_GETSTREAM; 1715 return (0); 1716 } 1717 nfs_realign(recm, 10 * NFSX_UNSIGNED); 1718 if (slp->ns_recend) 1719 slp->ns_recend->m_nextpkt = recm; 1720 else 1721 slp->ns_rec = recm; 1722 slp->ns_recend = recm; 1723 } 1724 } 1725 1726 /* 1727 * Parse an RPC header. 1728 */ 1729 nfsrv_dorec(slp, nd) 1730 register struct nfssvc_sock *slp; 1731 register struct nfsd *nd; 1732 { 1733 register struct mbuf *m; 1734 int error; 1735 1736 if ((slp->ns_flag & SLP_VALID) == 0 || 1737 (m = slp->ns_rec) == (struct mbuf *)0) 1738 return (ENOBUFS); 1739 if (slp->ns_rec = m->m_nextpkt) 1740 m->m_nextpkt = (struct mbuf *)0; 1741 else 1742 slp->ns_recend = (struct mbuf *)0; 1743 if (m->m_type == MT_SONAME) { 1744 nd->nd_nam = m; 1745 nd->nd_md = nd->nd_mrep = m->m_next; 1746 m->m_next = (struct mbuf *)0; 1747 } else { 1748 nd->nd_nam = (struct mbuf *)0; 1749 nd->nd_md = nd->nd_mrep = m; 1750 } 1751 nd->nd_dpos = mtod(nd->nd_md, caddr_t); 1752 if (error = nfs_getreq(nd, TRUE)) { 1753 m_freem(nd->nd_nam); 1754 return (error); 1755 } 1756 return (0); 1757 } 1758 1759 /* 1760 * Parse an RPC request 1761 * - verify it 1762 * - fill in the cred struct. 1763 */ 1764 nfs_getreq(nd, has_header) 1765 register struct nfsd *nd; 1766 int has_header; 1767 { 1768 register int len, i; 1769 register u_long *tl; 1770 register long t1; 1771 struct uio uio; 1772 struct iovec iov; 1773 caddr_t dpos, cp2; 1774 u_long nfsvers, auth_type; 1775 int error = 0, nqnfs = 0; 1776 struct mbuf *mrep, *md; 1777 1778 mrep = nd->nd_mrep; 1779 md = nd->nd_md; 1780 dpos = nd->nd_dpos; 1781 if (has_header) { 1782 nfsm_dissect(tl, u_long *, 10*NFSX_UNSIGNED); 1783 nd->nd_retxid = *tl++; 1784 if (*tl++ != rpc_call) { 1785 m_freem(mrep); 1786 return (EBADRPC); 1787 } 1788 } else { 1789 nfsm_dissect(tl, u_long *, 8*NFSX_UNSIGNED); 1790 } 1791 nd->nd_repstat = 0; 1792 if (*tl++ != rpc_vers) { 1793 nd->nd_repstat = ERPCMISMATCH; 1794 nd->nd_procnum = NFSPROC_NOOP; 1795 return (0); 1796 } 1797 nfsvers = nfs_vers; 1798 if (*tl != nfs_prog) { 1799 if (*tl == nqnfs_prog) { 1800 nqnfs++; 1801 nfsvers = nqnfs_vers; 1802 } else { 1803 nd->nd_repstat = EPROGUNAVAIL; 1804 nd->nd_procnum = NFSPROC_NOOP; 1805 return (0); 1806 } 1807 } 1808 tl++; 1809 if (*tl++ != nfsvers) { 1810 nd->nd_repstat = EPROGMISMATCH; 1811 nd->nd_procnum = NFSPROC_NOOP; 1812 return (0); 1813 } 1814 nd->nd_procnum = fxdr_unsigned(u_long, *tl++); 1815 if (nd->nd_procnum == NFSPROC_NULL) 1816 return (0); 1817 if (nd->nd_procnum >= NFS_NPROCS || 1818 (!nqnfs && nd->nd_procnum > NFSPROC_STATFS) || 1819 (*tl != rpc_auth_unix && *tl != rpc_auth_kerb)) { 1820 nd->nd_repstat = EPROCUNAVAIL; 1821 nd->nd_procnum = NFSPROC_NOOP; 1822 return (0); 1823 } 1824 auth_type = *tl++; 1825 len = fxdr_unsigned(int, *tl++); 1826 if (len < 0 || len > RPCAUTH_MAXSIZ) { 1827 m_freem(mrep); 1828 return (EBADRPC); 1829 } 1830 1831 /* 1832 * Handle auth_unix or auth_kerb. 1833 */ 1834 if (auth_type == rpc_auth_unix) { 1835 len = fxdr_unsigned(int, *++tl); 1836 if (len < 0 || len > NFS_MAXNAMLEN) { 1837 m_freem(mrep); 1838 return (EBADRPC); 1839 } 1840 nfsm_adv(nfsm_rndup(len)); 1841 nfsm_dissect(tl, u_long *, 3*NFSX_UNSIGNED); 1842 nd->nd_cr.cr_uid = fxdr_unsigned(uid_t, *tl++); 1843 nd->nd_cr.cr_gid = fxdr_unsigned(gid_t, *tl++); 1844 len = fxdr_unsigned(int, *tl); 1845 if (len < 0 || len > RPCAUTH_UNIXGIDS) { 1846 m_freem(mrep); 1847 return (EBADRPC); 1848 } 1849 nfsm_dissect(tl, u_long *, (len + 2)*NFSX_UNSIGNED); 1850 for (i = 1; i <= len; i++) 1851 if (i < NGROUPS) 1852 nd->nd_cr.cr_groups[i] = fxdr_unsigned(gid_t, *tl++); 1853 else 1854 tl++; 1855 nd->nd_cr.cr_ngroups = (len >= NGROUPS) ? NGROUPS : (len + 1); 1856 } else if (auth_type == rpc_auth_kerb) { 1857 nd->nd_cr.cr_uid = fxdr_unsigned(uid_t, *tl++); 1858 nd->nd_authlen = fxdr_unsigned(int, *tl); 1859 uio.uio_resid = nfsm_rndup(nd->nd_authlen); 1860 if (uio.uio_resid > (len - 2 * NFSX_UNSIGNED)) { 1861 m_freem(mrep); 1862 return (EBADRPC); 1863 } 1864 uio.uio_offset = 0; 1865 uio.uio_iov = &iov; 1866 uio.uio_iovcnt = 1; 1867 uio.uio_segflg = UIO_SYSSPACE; 1868 iov.iov_base = (caddr_t)nd->nd_authstr; 1869 iov.iov_len = RPCAUTH_MAXSIZ; 1870 nfsm_mtouio(&uio, uio.uio_resid); 1871 nfsm_dissect(tl, u_long *, 2 * NFSX_UNSIGNED); 1872 nd->nd_flag |= NFSD_NEEDAUTH; 1873 } 1874 1875 /* 1876 * Do we have any use for the verifier. 1877 * According to the "Remote Procedure Call Protocol Spec." it 1878 * should be AUTH_NULL, but some clients make it AUTH_UNIX? 1879 * For now, just skip over it 1880 */ 1881 len = fxdr_unsigned(int, *++tl); 1882 if (len < 0 || len > RPCAUTH_MAXSIZ) { 1883 m_freem(mrep); 1884 return (EBADRPC); 1885 } 1886 if (len > 0) { 1887 nfsm_adv(nfsm_rndup(len)); 1888 } 1889 1890 /* 1891 * For nqnfs, get piggybacked lease request. 1892 */ 1893 if (nqnfs && nd->nd_procnum != NQNFSPROC_EVICTED) { 1894 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); 1895 nd->nd_nqlflag = fxdr_unsigned(int, *tl); 1896 if (nd->nd_nqlflag) { 1897 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); 1898 nd->nd_duration = fxdr_unsigned(int, *tl); 1899 } else 1900 nd->nd_duration = NQ_MINLEASE; 1901 } else { 1902 nd->nd_nqlflag = NQL_NOVAL; 1903 nd->nd_duration = NQ_MINLEASE; 1904 } 1905 nd->nd_md = md; 1906 nd->nd_dpos = dpos; 1907 return (0); 1908 nfsmout: 1909 return (error); 1910 } 1911 1912 /* 1913 * Search for a sleeping nfsd and wake it up. 1914 * SIDE EFFECT: If none found, set NFSD_CHECKSLP flag, so that one of the 1915 * running nfsds will go look for the work in the nfssvc_sock list. 1916 */ 1917 void 1918 nfsrv_wakenfsd(slp) 1919 struct nfssvc_sock *slp; 1920 { 1921 register struct nfsd *nd; 1922 1923 if ((slp->ns_flag & SLP_VALID) == 0) 1924 return; 1925 for (nd = nfsd_head.tqh_first; nd != 0; nd = nd->nd_chain.tqe_next) { 1926 if (nd->nd_flag & NFSD_WAITING) { 1927 nd->nd_flag &= ~NFSD_WAITING; 1928 if (nd->nd_slp) 1929 panic("nfsd wakeup"); 1930 slp->ns_sref++; 1931 nd->nd_slp = slp; 1932 wakeup((caddr_t)nd); 1933 return; 1934 } 1935 } 1936 slp->ns_flag |= SLP_DOREC; 1937 nfsd_head_flag |= NFSD_CHECKSLP; 1938 } 1939 1940 nfs_msg(p, server, msg) 1941 struct proc *p; 1942 char *server, *msg; 1943 { 1944 tpr_t tpr; 1945 1946 if (p) 1947 tpr = tprintf_open(p); 1948 else 1949 tpr = NULL; 1950 tprintf(tpr, "nfs server %s: %s\n", server, msg); 1951 tprintf_close(tpr); 1952 } 1953