nfs_socket.c revision 1.160
1 /* $NetBSD: nfs_socket.c,v 1.160 2007/07/09 21:11:30 ad Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1991, 1993, 1995 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)nfs_socket.c 8.5 (Berkeley) 3/30/95 35 */ 36 37 /* 38 * Socket operations for use by nfs 39 */ 40 41 #include <sys/cdefs.h> 42 __KERNEL_RCSID(0, "$NetBSD: nfs_socket.c,v 1.160 2007/07/09 21:11:30 ad Exp $"); 43 44 #include "fs_nfs.h" 45 #include "opt_nfs.h" 46 #include "opt_nfsserver.h" 47 #include "opt_mbuftrace.h" 48 #include "opt_inet.h" 49 50 #include <sys/param.h> 51 #include <sys/systm.h> 52 #include <sys/callout.h> 53 #include <sys/proc.h> 54 #include <sys/mount.h> 55 #include <sys/kernel.h> 56 #include <sys/mbuf.h> 57 #include <sys/vnode.h> 58 #include <sys/domain.h> 59 #include <sys/protosw.h> 60 #include <sys/socket.h> 61 #include <sys/socketvar.h> 62 #include <sys/syslog.h> 63 #include <sys/tprintf.h> 64 #include <sys/namei.h> 65 #include <sys/signal.h> 66 #include <sys/signalvar.h> 67 #include <sys/kauth.h> 68 69 #include <netinet/in.h> 70 #include <netinet/tcp.h> 71 72 #include <nfs/rpcv2.h> 73 #include <nfs/nfsproto.h> 74 #include <nfs/nfs.h> 75 #include <nfs/xdr_subs.h> 76 #include <nfs/nfsm_subs.h> 77 #include <nfs/nfsmount.h> 78 #include <nfs/nfsnode.h> 79 #include <nfs/nfsrtt.h> 80 #include <nfs/nfs_var.h> 81 82 MALLOC_DEFINE(M_NFSREQ, "NFS req", "NFS request header"); 83 #ifdef MBUFTRACE 84 struct mowner nfs_mowner = MOWNER_INIT("nfs",""); 85 #endif 86 87 /* 88 * Estimate rto for an nfs rpc sent via. an unreliable datagram. 89 * Use the mean and mean deviation of rtt for the appropriate type of rpc 90 * for the frequent rpcs and a default for the others. 91 * The justification for doing "other" this way is that these rpcs 92 * happen so infrequently that timer est. would probably be stale. 93 * Also, since many of these rpcs are 94 * non-idempotent, a conservative timeout is desired. 95 * getattr, lookup - A+2D 96 * read, write - A+4D 97 * other - nm_timeo 98 */ 99 #define NFS_RTO(n, t) \ 100 ((t) == 0 ? (n)->nm_timeo : \ 101 ((t) < 3 ? \ 102 (((((n)->nm_srtt[t-1] + 3) >> 2) + (n)->nm_sdrtt[t-1] + 1) >> 1) : \ 103 ((((n)->nm_srtt[t-1] + 7) >> 3) + (n)->nm_sdrtt[t-1] + 1))) 104 #define NFS_SRTT(r) (r)->r_nmp->nm_srtt[proct[(r)->r_procnum] - 1] 105 #define NFS_SDRTT(r) (r)->r_nmp->nm_sdrtt[proct[(r)->r_procnum] - 1] 106 /* 107 * External data, mostly RPC constants in XDR form 108 */ 109 extern u_int32_t rpc_reply, rpc_msgdenied, rpc_mismatch, rpc_vers, 110 rpc_auth_unix, rpc_msgaccepted, rpc_call, rpc_autherr, 111 rpc_auth_kerb; 112 extern u_int32_t nfs_prog; 113 extern const int nfsv3_procid[NFS_NPROCS]; 114 extern int nfs_ticks; 115 116 /* 117 * Defines which timer to use for the procnum. 118 * 0 - default 119 * 1 - getattr 120 * 2 - lookup 121 * 3 - read 122 * 4 - write 123 */ 124 static const int proct[NFS_NPROCS] = { 125 [NFSPROC_NULL] = 0, 126 [NFSPROC_GETATTR] = 1, 127 [NFSPROC_SETATTR] = 0, 128 [NFSPROC_LOOKUP] = 2, 129 [NFSPROC_ACCESS] = 1, 130 [NFSPROC_READLINK] = 3, 131 [NFSPROC_READ] = 3, 132 [NFSPROC_WRITE] = 4, 133 [NFSPROC_CREATE] = 0, 134 [NFSPROC_MKDIR] = 0, 135 [NFSPROC_SYMLINK] = 0, 136 [NFSPROC_MKNOD] = 0, 137 [NFSPROC_REMOVE] = 0, 138 [NFSPROC_RMDIR] = 0, 139 [NFSPROC_RENAME] = 0, 140 [NFSPROC_LINK] = 0, 141 [NFSPROC_READDIR] = 3, 142 [NFSPROC_READDIRPLUS] = 3, 143 [NFSPROC_FSSTAT] = 0, 144 [NFSPROC_FSINFO] = 0, 145 [NFSPROC_PATHCONF] = 0, 146 [NFSPROC_COMMIT] = 0, 147 [NFSPROC_NOOP] = 0, 148 }; 149 150 /* 151 * There is a congestion window for outstanding rpcs maintained per mount 152 * point. The cwnd size is adjusted in roughly the way that: 153 * Van Jacobson, Congestion avoidance and Control, In "Proceedings of 154 * SIGCOMM '88". ACM, August 1988. 155 * describes for TCP. The cwnd size is chopped in half on a retransmit timeout 156 * and incremented by 1/cwnd when each rpc reply is received and a full cwnd 157 * of rpcs is in progress. 158 * (The sent count and cwnd are scaled for integer arith.) 159 * Variants of "slow start" were tried and were found to be too much of a 160 * performance hit (ave. rtt 3 times larger), 161 * I suspect due to the large rtt that nfs rpcs have. 162 */ 163 #define NFS_CWNDSCALE 256 164 #define NFS_MAXCWND (NFS_CWNDSCALE * 32) 165 static const int nfs_backoff[8] = { 2, 4, 8, 16, 32, 64, 128, 256, }; 166 int nfsrtton = 0; 167 struct nfsrtt nfsrtt; 168 struct nfsreqhead nfs_reqq; 169 callout_t nfs_timer_ch; 170 171 static int nfs_sndlock(struct nfsmount *, struct nfsreq *); 172 static void nfs_sndunlock(struct nfsmount *); 173 static int nfs_rcvlock(struct nfsmount *, struct nfsreq *); 174 static void nfs_rcvunlock(struct nfsmount *); 175 176 /* 177 * Initialize sockets and congestion for a new NFS connection. 178 * We do not free the sockaddr if error. 179 */ 180 int 181 nfs_connect(nmp, rep, l) 182 struct nfsmount *nmp; 183 struct nfsreq *rep; 184 struct lwp *l; 185 { 186 struct socket *so; 187 int s, error, rcvreserve, sndreserve; 188 struct sockaddr *saddr; 189 struct sockaddr_in *sin; 190 #ifdef INET6 191 struct sockaddr_in6 *sin6; 192 #endif 193 struct mbuf *m; 194 195 nmp->nm_so = (struct socket *)0; 196 saddr = mtod(nmp->nm_nam, struct sockaddr *); 197 error = socreate(saddr->sa_family, &nmp->nm_so, 198 nmp->nm_sotype, nmp->nm_soproto, l); 199 if (error) 200 goto bad; 201 so = nmp->nm_so; 202 #ifdef MBUFTRACE 203 so->so_mowner = &nfs_mowner; 204 so->so_rcv.sb_mowner = &nfs_mowner; 205 so->so_snd.sb_mowner = &nfs_mowner; 206 #endif 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 m = m_get(M_WAIT, MT_SOOPTS); 214 MCLAIM(m, so->so_mowner); 215 *mtod(m, int32_t *) = IP_PORTRANGE_LOW; 216 m->m_len = sizeof(int32_t); 217 if ((error = sosetopt(so, IPPROTO_IP, IP_PORTRANGE, m))) 218 goto bad; 219 m = m_get(M_WAIT, MT_SONAME); 220 MCLAIM(m, so->so_mowner); 221 sin = mtod(m, struct sockaddr_in *); 222 sin->sin_len = m->m_len = sizeof (struct sockaddr_in); 223 sin->sin_family = AF_INET; 224 sin->sin_addr.s_addr = INADDR_ANY; 225 sin->sin_port = 0; 226 error = sobind(so, m, &lwp0); 227 m_freem(m); 228 if (error) 229 goto bad; 230 } 231 #ifdef INET6 232 if (saddr->sa_family == AF_INET6 && (nmp->nm_flag & NFSMNT_RESVPORT)) { 233 m = m_get(M_WAIT, MT_SOOPTS); 234 MCLAIM(m, so->so_mowner); 235 *mtod(m, int32_t *) = IPV6_PORTRANGE_LOW; 236 m->m_len = sizeof(int32_t); 237 if ((error = sosetopt(so, IPPROTO_IPV6, IPV6_PORTRANGE, m))) 238 goto bad; 239 m = m_get(M_WAIT, MT_SONAME); 240 MCLAIM(m, so->so_mowner); 241 sin6 = mtod(m, struct sockaddr_in6 *); 242 sin6->sin6_len = m->m_len = sizeof (struct sockaddr_in6); 243 sin6->sin6_family = AF_INET6; 244 sin6->sin6_addr = in6addr_any; 245 sin6->sin6_port = 0; 246 error = sobind(so, m, &lwp0); 247 m_freem(m); 248 if (error) 249 goto bad; 250 } 251 #endif 252 253 /* 254 * Protocols that do not require connections may be optionally left 255 * unconnected for servers that reply from a port other than NFS_PORT. 256 */ 257 if (nmp->nm_flag & NFSMNT_NOCONN) { 258 if (nmp->nm_soflags & PR_CONNREQUIRED) { 259 error = ENOTCONN; 260 goto bad; 261 } 262 } else { 263 error = soconnect(so, nmp->nm_nam, l); 264 if (error) 265 goto bad; 266 267 /* 268 * Wait for the connection to complete. Cribbed from the 269 * connect system call but with the wait timing out so 270 * that interruptible mounts don't hang here for a long time. 271 */ 272 s = splsoftnet(); 273 while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) { 274 (void) tsleep((void *)&so->so_timeo, PSOCK, 275 "nfscn1", 2 * hz); 276 if ((so->so_state & SS_ISCONNECTING) && 277 so->so_error == 0 && rep && 278 (error = nfs_sigintr(nmp, rep, rep->r_lwp)) != 0){ 279 so->so_state &= ~SS_ISCONNECTING; 280 splx(s); 281 goto bad; 282 } 283 } 284 if (so->so_error) { 285 error = so->so_error; 286 so->so_error = 0; 287 splx(s); 288 goto bad; 289 } 290 splx(s); 291 } 292 if (nmp->nm_flag & (NFSMNT_SOFT | NFSMNT_INT)) { 293 so->so_rcv.sb_timeo = (5 * hz); 294 so->so_snd.sb_timeo = (5 * hz); 295 } else { 296 /* 297 * enable receive timeout to detect server crash and reconnect. 298 * otherwise, we can be stuck in soreceive forever. 299 */ 300 so->so_rcv.sb_timeo = (5 * hz); 301 so->so_snd.sb_timeo = 0; 302 } 303 if (nmp->nm_sotype == SOCK_DGRAM) { 304 sndreserve = (nmp->nm_wsize + NFS_MAXPKTHDR) * 2; 305 rcvreserve = (max(nmp->nm_rsize, nmp->nm_readdirsize) + 306 NFS_MAXPKTHDR) * 2; 307 } else if (nmp->nm_sotype == SOCK_SEQPACKET) { 308 sndreserve = (nmp->nm_wsize + NFS_MAXPKTHDR) * 2; 309 rcvreserve = (max(nmp->nm_rsize, nmp->nm_readdirsize) + 310 NFS_MAXPKTHDR) * 2; 311 } else { 312 if (nmp->nm_sotype != SOCK_STREAM) 313 panic("nfscon sotype"); 314 if (so->so_proto->pr_flags & PR_CONNREQUIRED) { 315 m = m_get(M_WAIT, MT_SOOPTS); 316 MCLAIM(m, so->so_mowner); 317 *mtod(m, int32_t *) = 1; 318 m->m_len = sizeof(int32_t); 319 sosetopt(so, SOL_SOCKET, SO_KEEPALIVE, m); 320 } 321 if (so->so_proto->pr_protocol == IPPROTO_TCP) { 322 m = m_get(M_WAIT, MT_SOOPTS); 323 MCLAIM(m, so->so_mowner); 324 *mtod(m, int32_t *) = 1; 325 m->m_len = sizeof(int32_t); 326 sosetopt(so, IPPROTO_TCP, TCP_NODELAY, m); 327 } 328 sndreserve = (nmp->nm_wsize + NFS_MAXPKTHDR + 329 sizeof (u_int32_t)) * 2; 330 rcvreserve = (nmp->nm_rsize + NFS_MAXPKTHDR + 331 sizeof (u_int32_t)) * 2; 332 } 333 error = soreserve(so, sndreserve, rcvreserve); 334 if (error) 335 goto bad; 336 so->so_rcv.sb_flags |= SB_NOINTR; 337 so->so_snd.sb_flags |= SB_NOINTR; 338 339 /* Initialize other non-zero congestion variables */ 340 nmp->nm_srtt[0] = nmp->nm_srtt[1] = nmp->nm_srtt[2] = nmp->nm_srtt[3] = 341 NFS_TIMEO << 3; 342 nmp->nm_sdrtt[0] = nmp->nm_sdrtt[1] = nmp->nm_sdrtt[2] = 343 nmp->nm_sdrtt[3] = 0; 344 nmp->nm_cwnd = NFS_MAXCWND / 2; /* Initial send window */ 345 nmp->nm_sent = 0; 346 nmp->nm_timeouts = 0; 347 return (0); 348 349 bad: 350 nfs_disconnect(nmp); 351 return (error); 352 } 353 354 /* 355 * Reconnect routine: 356 * Called when a connection is broken on a reliable protocol. 357 * - clean up the old socket 358 * - nfs_connect() again 359 * - set R_MUSTRESEND for all outstanding requests on mount point 360 * If this fails the mount point is DEAD! 361 * nb: Must be called with the nfs_sndlock() set on the mount point. 362 */ 363 int 364 nfs_reconnect(rep, l) 365 struct nfsreq *rep; 366 struct lwp *l; 367 { 368 struct nfsreq *rp; 369 struct nfsmount *nmp = rep->r_nmp; 370 int error; 371 372 nfs_disconnect(nmp); 373 while ((error = nfs_connect(nmp, rep, l)) != 0) { 374 if (error == EINTR || error == ERESTART) 375 return (EINTR); 376 (void) tsleep((void *)&lbolt, PSOCK, "nfscn2", 0); 377 } 378 379 /* 380 * Loop through outstanding request list and fix up all requests 381 * on old socket. 382 */ 383 TAILQ_FOREACH(rp, &nfs_reqq, r_chain) { 384 if (rp->r_nmp == nmp) { 385 if ((rp->r_flags & R_MUSTRESEND) == 0) 386 rp->r_flags |= R_MUSTRESEND | R_REXMITTED; 387 rp->r_rexmit = 0; 388 } 389 } 390 return (0); 391 } 392 393 /* 394 * NFS disconnect. Clean up and unlink. 395 */ 396 void 397 nfs_disconnect(nmp) 398 struct nfsmount *nmp; 399 { 400 struct socket *so; 401 int drain = 0; 402 403 if (nmp->nm_so) { 404 so = nmp->nm_so; 405 nmp->nm_so = (struct socket *)0; 406 soshutdown(so, SHUT_RDWR); 407 drain = (nmp->nm_iflag & NFSMNT_DISMNT) != 0; 408 if (drain) { 409 /* 410 * soshutdown() above should wake up the current 411 * listener. 412 * Now wake up those waiting for the receive lock, and 413 * wait for them to go away unhappy, to prevent *nmp 414 * from evaporating while they're sleeping. 415 */ 416 mutex_enter(&nmp->nm_lock); 417 while (nmp->nm_waiters > 0) { 418 cv_broadcast(&nmp->nm_rcvcv); 419 cv_broadcast(&nmp->nm_sndcv); 420 cv_wait(&nmp->nm_disconcv, &nmp->nm_lock); 421 } 422 mutex_exit(&nmp->nm_lock); 423 } 424 soclose(so); 425 } 426 #ifdef DIAGNOSTIC 427 if (drain && (nmp->nm_waiters > 0)) 428 panic("nfs_disconnect: waiters left after drain?"); 429 #endif 430 } 431 432 void 433 nfs_safedisconnect(nmp) 434 struct nfsmount *nmp; 435 { 436 struct nfsreq dummyreq; 437 438 memset(&dummyreq, 0, sizeof(dummyreq)); 439 dummyreq.r_nmp = nmp; 440 nfs_rcvlock(nmp, &dummyreq); /* XXX ignored error return */ 441 nfs_disconnect(nmp); 442 nfs_rcvunlock(nmp); 443 } 444 445 /* 446 * This is the nfs send routine. For connection based socket types, it 447 * must be called with an nfs_sndlock() on the socket. 448 * "rep == NULL" indicates that it has been called from a server. 449 * For the client side: 450 * - return EINTR if the RPC is terminated, 0 otherwise 451 * - set R_MUSTRESEND if the send fails for any reason 452 * - do any cleanup required by recoverable socket errors (? ? ?) 453 * For the server side: 454 * - return EINTR or ERESTART if interrupted by a signal 455 * - return EPIPE if a connection is lost for connection based sockets (TCP...) 456 * - do any cleanup required by recoverable socket errors (? ? ?) 457 */ 458 int 459 nfs_send(so, nam, top, rep, l) 460 struct socket *so; 461 struct mbuf *nam; 462 struct mbuf *top; 463 struct nfsreq *rep; 464 struct lwp *l; 465 { 466 struct mbuf *sendnam; 467 int error, soflags, flags; 468 469 /* XXX nfs_doio()/nfs_request() calls with rep->r_lwp == NULL */ 470 if (l == NULL && rep->r_lwp == NULL) 471 l = curlwp; 472 473 if (rep) { 474 if (rep->r_flags & R_SOFTTERM) { 475 m_freem(top); 476 return (EINTR); 477 } 478 if ((so = rep->r_nmp->nm_so) == NULL) { 479 rep->r_flags |= R_MUSTRESEND; 480 m_freem(top); 481 return (0); 482 } 483 rep->r_flags &= ~R_MUSTRESEND; 484 soflags = rep->r_nmp->nm_soflags; 485 } else 486 soflags = so->so_proto->pr_flags; 487 if ((soflags & PR_CONNREQUIRED) || (so->so_state & SS_ISCONNECTED)) 488 sendnam = (struct mbuf *)0; 489 else 490 sendnam = nam; 491 if (so->so_type == SOCK_SEQPACKET) 492 flags = MSG_EOR; 493 else 494 flags = 0; 495 496 error = (*so->so_send)(so, sendnam, (struct uio *)0, top, 497 (struct mbuf *)0, flags, l); 498 if (error) { 499 if (rep) { 500 if (error == ENOBUFS && so->so_type == SOCK_DGRAM) { 501 /* 502 * We're too fast for the network/driver, 503 * and UDP isn't flowcontrolled. 504 * We need to resend. This is not fatal, 505 * just try again. 506 * 507 * Could be smarter here by doing some sort 508 * of a backoff, but this is rare. 509 */ 510 rep->r_flags |= R_MUSTRESEND; 511 } else { 512 if (error != EPIPE) 513 log(LOG_INFO, 514 "nfs send error %d for %s\n", 515 error, 516 rep->r_nmp->nm_mountp-> 517 mnt_stat.f_mntfromname); 518 /* 519 * Deal with errors for the client side. 520 */ 521 if (rep->r_flags & R_SOFTTERM) 522 error = EINTR; 523 else 524 rep->r_flags |= R_MUSTRESEND; 525 } 526 } else { 527 /* 528 * See above. This error can happen under normal 529 * circumstances and the log is too noisy. 530 * The error will still show up in nfsstat. 531 */ 532 if (error != ENOBUFS || so->so_type != SOCK_DGRAM) 533 log(LOG_INFO, "nfsd send error %d\n", error); 534 } 535 536 /* 537 * Handle any recoverable (soft) socket errors here. (? ? ?) 538 */ 539 if (error != EINTR && error != ERESTART && 540 error != EWOULDBLOCK && error != EPIPE) 541 error = 0; 542 } 543 return (error); 544 } 545 546 #ifdef NFS 547 /* 548 * Receive a Sun RPC Request/Reply. For SOCK_DGRAM, the work is all 549 * done by soreceive(), but for SOCK_STREAM we must deal with the Record 550 * Mark and consolidate the data into a new mbuf list. 551 * nb: Sometimes TCP passes the data up to soreceive() in long lists of 552 * small mbufs. 553 * For SOCK_STREAM we must be very careful to read an entire record once 554 * we have read any of it, even if the system call has been interrupted. 555 */ 556 int 557 nfs_receive(rep, aname, mp, l) 558 struct nfsreq *rep; 559 struct mbuf **aname; 560 struct mbuf **mp; 561 struct lwp *l; 562 { 563 struct socket *so; 564 struct uio auio; 565 struct iovec aio; 566 struct mbuf *m; 567 struct mbuf *control; 568 u_int32_t len; 569 struct mbuf **getnam; 570 int error, sotype, rcvflg; 571 572 /* 573 * Set up arguments for soreceive() 574 */ 575 *mp = (struct mbuf *)0; 576 *aname = (struct mbuf *)0; 577 sotype = rep->r_nmp->nm_sotype; 578 579 /* 580 * For reliable protocols, lock against other senders/receivers 581 * in case a reconnect is necessary. 582 * For SOCK_STREAM, first get the Record Mark to find out how much 583 * more there is to get. 584 * We must lock the socket against other receivers 585 * until we have an entire rpc request/reply. 586 */ 587 if (sotype != SOCK_DGRAM) { 588 error = nfs_sndlock(rep->r_nmp, rep); 589 if (error) 590 return (error); 591 tryagain: 592 /* 593 * Check for fatal errors and resending request. 594 */ 595 /* 596 * Ugh: If a reconnect attempt just happened, nm_so 597 * would have changed. NULL indicates a failed 598 * attempt that has essentially shut down this 599 * mount point. 600 */ 601 if (rep->r_mrep || (rep->r_flags & R_SOFTTERM)) { 602 nfs_sndunlock(rep->r_nmp); 603 return (EINTR); 604 } 605 so = rep->r_nmp->nm_so; 606 if (!so) { 607 error = nfs_reconnect(rep, l); 608 if (error) { 609 nfs_sndunlock(rep->r_nmp); 610 return (error); 611 } 612 goto tryagain; 613 } 614 while (rep->r_flags & R_MUSTRESEND) { 615 m = m_copym(rep->r_mreq, 0, M_COPYALL, M_WAIT); 616 nfsstats.rpcretries++; 617 rep->r_rtt = 0; 618 rep->r_flags &= ~R_TIMING; 619 error = nfs_send(so, rep->r_nmp->nm_nam, m, rep, l); 620 if (error) { 621 if (error == EINTR || error == ERESTART || 622 (error = nfs_reconnect(rep, l)) != 0) { 623 nfs_sndunlock(rep->r_nmp); 624 return (error); 625 } 626 goto tryagain; 627 } 628 } 629 nfs_sndunlock(rep->r_nmp); 630 if (sotype == SOCK_STREAM) { 631 aio.iov_base = (void *) &len; 632 aio.iov_len = sizeof(u_int32_t); 633 auio.uio_iov = &aio; 634 auio.uio_iovcnt = 1; 635 auio.uio_rw = UIO_READ; 636 auio.uio_offset = 0; 637 auio.uio_resid = sizeof(u_int32_t); 638 UIO_SETUP_SYSSPACE(&auio); 639 do { 640 rcvflg = MSG_WAITALL; 641 error = (*so->so_receive)(so, (struct mbuf **)0, &auio, 642 (struct mbuf **)0, (struct mbuf **)0, &rcvflg); 643 if (error == EWOULDBLOCK && rep) { 644 if (rep->r_flags & R_SOFTTERM) 645 return (EINTR); 646 /* 647 * if it seems that the server died after it 648 * received our request, set EPIPE so that 649 * we'll reconnect and retransmit requests. 650 */ 651 if (rep->r_rexmit >= rep->r_nmp->nm_retry) { 652 nfsstats.rpctimeouts++; 653 error = EPIPE; 654 } 655 } 656 } while (error == EWOULDBLOCK); 657 if (!error && auio.uio_resid > 0) { 658 /* 659 * Don't log a 0 byte receive; it means 660 * that the socket has been closed, and 661 * can happen during normal operation 662 * (forcible unmount or Solaris server). 663 */ 664 if (auio.uio_resid != sizeof (u_int32_t)) 665 log(LOG_INFO, 666 "short receive (%lu/%lu) from nfs server %s\n", 667 (u_long)sizeof(u_int32_t) - auio.uio_resid, 668 (u_long)sizeof(u_int32_t), 669 rep->r_nmp->nm_mountp->mnt_stat.f_mntfromname); 670 error = EPIPE; 671 } 672 if (error) 673 goto errout; 674 len = ntohl(len) & ~0x80000000; 675 /* 676 * This is SERIOUS! We are out of sync with the sender 677 * and forcing a disconnect/reconnect is all I can do. 678 */ 679 if (len > NFS_MAXPACKET) { 680 log(LOG_ERR, "%s (%d) from nfs server %s\n", 681 "impossible packet length", 682 len, 683 rep->r_nmp->nm_mountp->mnt_stat.f_mntfromname); 684 error = EFBIG; 685 goto errout; 686 } 687 auio.uio_resid = len; 688 do { 689 rcvflg = MSG_WAITALL; 690 error = (*so->so_receive)(so, (struct mbuf **)0, 691 &auio, mp, (struct mbuf **)0, &rcvflg); 692 } while (error == EWOULDBLOCK || error == EINTR || 693 error == ERESTART); 694 if (!error && auio.uio_resid > 0) { 695 if (len != auio.uio_resid) 696 log(LOG_INFO, 697 "short receive (%lu/%d) from nfs server %s\n", 698 (u_long)len - auio.uio_resid, len, 699 rep->r_nmp->nm_mountp->mnt_stat.f_mntfromname); 700 error = EPIPE; 701 } 702 } else { 703 /* 704 * NB: Since uio_resid is big, MSG_WAITALL is ignored 705 * and soreceive() will return when it has either a 706 * control msg or a data msg. 707 * We have no use for control msg., but must grab them 708 * and then throw them away so we know what is going 709 * on. 710 */ 711 auio.uio_resid = len = 100000000; /* Anything Big */ 712 /* not need to setup uio_vmspace */ 713 do { 714 rcvflg = 0; 715 error = (*so->so_receive)(so, (struct mbuf **)0, 716 &auio, mp, &control, &rcvflg); 717 if (control) 718 m_freem(control); 719 if (error == EWOULDBLOCK && rep) { 720 if (rep->r_flags & R_SOFTTERM) 721 return (EINTR); 722 } 723 } while (error == EWOULDBLOCK || 724 (!error && *mp == NULL && control)); 725 if ((rcvflg & MSG_EOR) == 0) 726 printf("Egad!!\n"); 727 if (!error && *mp == NULL) 728 error = EPIPE; 729 len -= auio.uio_resid; 730 } 731 errout: 732 if (error && error != EINTR && error != ERESTART) { 733 m_freem(*mp); 734 *mp = (struct mbuf *)0; 735 if (error != EPIPE) 736 log(LOG_INFO, 737 "receive error %d from nfs server %s\n", 738 error, 739 rep->r_nmp->nm_mountp->mnt_stat.f_mntfromname); 740 error = nfs_sndlock(rep->r_nmp, rep); 741 if (!error) 742 error = nfs_reconnect(rep, l); 743 if (!error) 744 goto tryagain; 745 else 746 nfs_sndunlock(rep->r_nmp); 747 } 748 } else { 749 if ((so = rep->r_nmp->nm_so) == NULL) 750 return (EACCES); 751 if (so->so_state & SS_ISCONNECTED) 752 getnam = (struct mbuf **)0; 753 else 754 getnam = aname; 755 auio.uio_resid = len = 1000000; 756 /* not need to setup uio_vmspace */ 757 do { 758 rcvflg = 0; 759 error = (*so->so_receive)(so, getnam, &auio, mp, 760 (struct mbuf **)0, &rcvflg); 761 if (error == EWOULDBLOCK && 762 (rep->r_flags & R_SOFTTERM)) 763 return (EINTR); 764 } while (error == EWOULDBLOCK); 765 len -= auio.uio_resid; 766 if (!error && *mp == NULL) 767 error = EPIPE; 768 } 769 if (error) { 770 m_freem(*mp); 771 *mp = (struct mbuf *)0; 772 } 773 return (error); 774 } 775 776 /* 777 * Implement receipt of reply on a socket. 778 * We must search through the list of received datagrams matching them 779 * with outstanding requests using the xid, until ours is found. 780 */ 781 /* ARGSUSED */ 782 int 783 nfs_reply(myrep, lwp) 784 struct nfsreq *myrep; 785 struct lwp *lwp; 786 { 787 struct nfsreq *rep; 788 struct nfsmount *nmp = myrep->r_nmp; 789 int32_t t1; 790 struct mbuf *mrep, *nam, *md; 791 u_int32_t rxid, *tl; 792 char *dpos, *cp2; 793 int error; 794 795 /* 796 * Loop around until we get our own reply 797 */ 798 for (;;) { 799 /* 800 * Lock against other receivers so that I don't get stuck in 801 * sbwait() after someone else has received my reply for me. 802 * Also necessary for connection based protocols to avoid 803 * race conditions during a reconnect. 804 */ 805 error = nfs_rcvlock(nmp, myrep); 806 if (error == EALREADY) 807 return (0); 808 if (error) 809 return (error); 810 /* 811 * Get the next Rpc reply off the socket 812 */ 813 814 mutex_enter(&nmp->nm_lock); 815 nmp->nm_waiters++; 816 mutex_exit(&nmp->nm_lock); 817 818 error = nfs_receive(myrep, &nam, &mrep, lwp); 819 820 mutex_enter(&nmp->nm_lock); 821 nmp->nm_waiters--; 822 cv_signal(&nmp->nm_disconcv); 823 mutex_exit(&nmp->nm_lock); 824 825 if (error) { 826 nfs_rcvunlock(nmp); 827 828 if (nmp->nm_iflag & NFSMNT_DISMNT) { 829 /* 830 * Oops, we're going away now.. 831 */ 832 return error; 833 } 834 /* 835 * Ignore routing errors on connectionless protocols? ? 836 */ 837 if (NFSIGNORE_SOERROR(nmp->nm_soflags, error)) { 838 nmp->nm_so->so_error = 0; 839 #ifdef DEBUG 840 printf("nfs_reply: ignoring error %d\n", error); 841 #endif 842 continue; 843 } 844 return (error); 845 } 846 if (nam) 847 m_freem(nam); 848 849 /* 850 * Get the xid and check that it is an rpc reply 851 */ 852 md = mrep; 853 dpos = mtod(md, void *); 854 nfsm_dissect(tl, u_int32_t *, 2*NFSX_UNSIGNED); 855 rxid = *tl++; 856 if (*tl != rpc_reply) { 857 nfsstats.rpcinvalid++; 858 m_freem(mrep); 859 nfsmout: 860 nfs_rcvunlock(nmp); 861 continue; 862 } 863 864 /* 865 * Loop through the request list to match up the reply 866 * Iff no match, just drop the datagram 867 */ 868 TAILQ_FOREACH(rep, &nfs_reqq, r_chain) { 869 if (rep->r_mrep == NULL && rxid == rep->r_xid) { 870 /* Found it.. */ 871 rep->r_mrep = mrep; 872 rep->r_md = md; 873 rep->r_dpos = dpos; 874 if (nfsrtton) { 875 struct rttl *rt; 876 877 rt = &nfsrtt.rttl[nfsrtt.pos]; 878 rt->proc = rep->r_procnum; 879 rt->rto = NFS_RTO(nmp, proct[rep->r_procnum]); 880 rt->sent = nmp->nm_sent; 881 rt->cwnd = nmp->nm_cwnd; 882 rt->srtt = nmp->nm_srtt[proct[rep->r_procnum] - 1]; 883 rt->sdrtt = nmp->nm_sdrtt[proct[rep->r_procnum] - 1]; 884 rt->fsid = nmp->nm_mountp->mnt_stat.f_fsidx; 885 getmicrotime(&rt->tstamp); 886 if (rep->r_flags & R_TIMING) 887 rt->rtt = rep->r_rtt; 888 else 889 rt->rtt = 1000000; 890 nfsrtt.pos = (nfsrtt.pos + 1) % NFSRTTLOGSIZ; 891 } 892 /* 893 * Update congestion window. 894 * Do the additive increase of 895 * one rpc/rtt. 896 */ 897 if (nmp->nm_cwnd <= nmp->nm_sent) { 898 nmp->nm_cwnd += 899 (NFS_CWNDSCALE * NFS_CWNDSCALE + 900 (nmp->nm_cwnd >> 1)) / nmp->nm_cwnd; 901 if (nmp->nm_cwnd > NFS_MAXCWND) 902 nmp->nm_cwnd = NFS_MAXCWND; 903 } 904 rep->r_flags &= ~R_SENT; 905 nmp->nm_sent -= NFS_CWNDSCALE; 906 /* 907 * Update rtt using a gain of 0.125 on the mean 908 * and a gain of 0.25 on the deviation. 909 */ 910 if (rep->r_flags & R_TIMING) { 911 /* 912 * Since the timer resolution of 913 * NFS_HZ is so course, it can often 914 * result in r_rtt == 0. Since 915 * r_rtt == N means that the actual 916 * rtt is between N+dt and N+2-dt ticks, 917 * add 1. 918 */ 919 t1 = rep->r_rtt + 1; 920 t1 -= (NFS_SRTT(rep) >> 3); 921 NFS_SRTT(rep) += t1; 922 if (t1 < 0) 923 t1 = -t1; 924 t1 -= (NFS_SDRTT(rep) >> 2); 925 NFS_SDRTT(rep) += t1; 926 } 927 nmp->nm_timeouts = 0; 928 break; 929 } 930 } 931 nfs_rcvunlock(nmp); 932 /* 933 * If not matched to a request, drop it. 934 * If it's mine, get out. 935 */ 936 if (rep == 0) { 937 nfsstats.rpcunexpected++; 938 m_freem(mrep); 939 } else if (rep == myrep) { 940 if (rep->r_mrep == NULL) 941 panic("nfsreply nil"); 942 return (0); 943 } 944 } 945 } 946 947 /* 948 * nfs_request - goes something like this 949 * - fill in request struct 950 * - links it into list 951 * - calls nfs_send() for first transmit 952 * - calls nfs_receive() to get reply 953 * - break down rpc header and return with nfs reply pointed to 954 * by mrep or error 955 * nb: always frees up mreq mbuf list 956 */ 957 int 958 nfs_request(np, mrest, procnum, lwp, cred, mrp, mdp, dposp, rexmitp) 959 struct nfsnode *np; 960 struct mbuf *mrest; 961 int procnum; 962 struct lwp *lwp; 963 kauth_cred_t cred; 964 struct mbuf **mrp; 965 struct mbuf **mdp; 966 char **dposp; 967 int *rexmitp; 968 { 969 struct mbuf *m, *mrep; 970 struct nfsreq *rep; 971 u_int32_t *tl; 972 int i; 973 struct nfsmount *nmp = VFSTONFS(np->n_vnode->v_mount); 974 struct mbuf *md, *mheadend; 975 char nickv[RPCX_NICKVERF]; 976 time_t waituntil; 977 char *dpos, *cp2; 978 int t1, s, error = 0, mrest_len, auth_len, auth_type; 979 int trylater_delay = NFS_TRYLATERDEL, failed_auth = 0; 980 int verf_len, verf_type; 981 u_int32_t xid; 982 char *auth_str, *verf_str; 983 NFSKERBKEY_T key; /* save session key */ 984 kauth_cred_t acred; 985 struct mbuf *mrest_backup = NULL; 986 kauth_cred_t origcred = NULL; /* XXX: gcc */ 987 bool retry_cred = true; 988 bool use_opencred = (np->n_flag & NUSEOPENCRED) != 0; 989 990 if (rexmitp != NULL) 991 *rexmitp = 0; 992 993 acred = kauth_cred_alloc(); 994 995 tryagain_cred: 996 KASSERT(cred != NULL); 997 MALLOC(rep, struct nfsreq *, sizeof(struct nfsreq), M_NFSREQ, M_WAITOK); 998 rep->r_nmp = nmp; 999 KASSERT(lwp == NULL || lwp == curlwp); 1000 rep->r_lwp = lwp; 1001 rep->r_procnum = procnum; 1002 i = 0; 1003 m = mrest; 1004 while (m) { 1005 i += m->m_len; 1006 m = m->m_next; 1007 } 1008 mrest_len = i; 1009 1010 /* 1011 * Get the RPC header with authorization. 1012 */ 1013 kerbauth: 1014 verf_str = auth_str = (char *)0; 1015 if (nmp->nm_flag & NFSMNT_KERB) { 1016 verf_str = nickv; 1017 verf_len = sizeof (nickv); 1018 auth_type = RPCAUTH_KERB4; 1019 memset((void *)key, 0, sizeof (key)); 1020 if (failed_auth || nfs_getnickauth(nmp, cred, &auth_str, 1021 &auth_len, verf_str, verf_len)) { 1022 error = nfs_getauth(nmp, rep, cred, &auth_str, 1023 &auth_len, verf_str, &verf_len, key); 1024 if (error) { 1025 free((void *)rep, M_NFSREQ); 1026 m_freem(mrest); 1027 KASSERT(kauth_cred_getrefcnt(acred) == 1); 1028 kauth_cred_free(acred); 1029 return (error); 1030 } 1031 } 1032 retry_cred = false; 1033 } else { 1034 /* AUTH_UNIX */ 1035 uid_t uid; 1036 gid_t gid; 1037 1038 /* 1039 * on the most unix filesystems, permission checks are 1040 * done when the file is open(2)'ed. 1041 * ie. once a file is successfully open'ed, 1042 * following i/o operations never fail with EACCES. 1043 * we try to follow the semantics as far as possible. 1044 * 1045 * note that we expect that the nfs server always grant 1046 * accesses by the file's owner. 1047 */ 1048 origcred = cred; 1049 switch (procnum) { 1050 case NFSPROC_READ: 1051 case NFSPROC_WRITE: 1052 case NFSPROC_COMMIT: 1053 uid = np->n_vattr->va_uid; 1054 gid = np->n_vattr->va_gid; 1055 if (kauth_cred_geteuid(cred) == uid && 1056 kauth_cred_getegid(cred) == gid) { 1057 retry_cred = false; 1058 break; 1059 } 1060 if (use_opencred) 1061 break; 1062 kauth_cred_setuid(acred, uid); 1063 kauth_cred_seteuid(acred, uid); 1064 kauth_cred_setsvuid(acred, uid); 1065 kauth_cred_setgid(acred, gid); 1066 kauth_cred_setegid(acred, gid); 1067 kauth_cred_setsvgid(acred, gid); 1068 cred = acred; 1069 break; 1070 default: 1071 retry_cred = false; 1072 break; 1073 } 1074 /* 1075 * backup mbuf chain if we can need it later to retry. 1076 * 1077 * XXX maybe we can keep a direct reference to 1078 * mrest without doing m_copym, but it's ...ugly. 1079 */ 1080 if (retry_cred) 1081 mrest_backup = m_copym(mrest, 0, M_COPYALL, M_WAIT); 1082 auth_type = RPCAUTH_UNIX; 1083 /* XXX elad - ngroups */ 1084 auth_len = (((kauth_cred_ngroups(cred) > nmp->nm_numgrps) ? 1085 nmp->nm_numgrps : kauth_cred_ngroups(cred)) << 2) + 1086 5 * NFSX_UNSIGNED; 1087 } 1088 m = nfsm_rpchead(cred, nmp->nm_flag, procnum, auth_type, auth_len, 1089 auth_str, verf_len, verf_str, mrest, mrest_len, &mheadend, &xid); 1090 if (auth_str) 1091 free(auth_str, M_TEMP); 1092 1093 /* 1094 * For stream protocols, insert a Sun RPC Record Mark. 1095 */ 1096 if (nmp->nm_sotype == SOCK_STREAM) { 1097 M_PREPEND(m, NFSX_UNSIGNED, M_WAIT); 1098 *mtod(m, u_int32_t *) = htonl(0x80000000 | 1099 (m->m_pkthdr.len - NFSX_UNSIGNED)); 1100 } 1101 rep->r_mreq = m; 1102 rep->r_xid = xid; 1103 tryagain: 1104 if (nmp->nm_flag & NFSMNT_SOFT) 1105 rep->r_retry = nmp->nm_retry; 1106 else 1107 rep->r_retry = NFS_MAXREXMIT + 1; /* past clip limit */ 1108 rep->r_rtt = rep->r_rexmit = 0; 1109 if (proct[procnum] > 0) 1110 rep->r_flags = R_TIMING; 1111 else 1112 rep->r_flags = 0; 1113 rep->r_mrep = NULL; 1114 1115 /* 1116 * Do the client side RPC. 1117 */ 1118 nfsstats.rpcrequests++; 1119 /* 1120 * Chain request into list of outstanding requests. Be sure 1121 * to put it LAST so timer finds oldest requests first. 1122 */ 1123 s = splsoftnet(); 1124 TAILQ_INSERT_TAIL(&nfs_reqq, rep, r_chain); 1125 1126 /* 1127 * If backing off another request or avoiding congestion, don't 1128 * send this one now but let timer do it. If not timing a request, 1129 * do it now. 1130 */ 1131 if (nmp->nm_so && (nmp->nm_sotype != SOCK_DGRAM || 1132 (nmp->nm_flag & NFSMNT_DUMBTIMR) || 1133 nmp->nm_sent < nmp->nm_cwnd)) { 1134 splx(s); 1135 if (nmp->nm_soflags & PR_CONNREQUIRED) 1136 error = nfs_sndlock(nmp, rep); 1137 if (!error) { 1138 m = m_copym(rep->r_mreq, 0, M_COPYALL, M_WAIT); 1139 error = nfs_send(nmp->nm_so, nmp->nm_nam, m, rep, lwp); 1140 if (nmp->nm_soflags & PR_CONNREQUIRED) 1141 nfs_sndunlock(nmp); 1142 } 1143 if (!error && (rep->r_flags & R_MUSTRESEND) == 0) { 1144 nmp->nm_sent += NFS_CWNDSCALE; 1145 rep->r_flags |= R_SENT; 1146 } 1147 } else { 1148 splx(s); 1149 rep->r_rtt = -1; 1150 } 1151 1152 /* 1153 * Wait for the reply from our send or the timer's. 1154 */ 1155 if (!error || error == EPIPE) 1156 error = nfs_reply(rep, lwp); 1157 1158 /* 1159 * RPC done, unlink the request. 1160 */ 1161 s = splsoftnet(); 1162 TAILQ_REMOVE(&nfs_reqq, rep, r_chain); 1163 splx(s); 1164 1165 /* 1166 * Decrement the outstanding request count. 1167 */ 1168 if (rep->r_flags & R_SENT) { 1169 rep->r_flags &= ~R_SENT; /* paranoia */ 1170 nmp->nm_sent -= NFS_CWNDSCALE; 1171 } 1172 1173 if (rexmitp != NULL) { 1174 int rexmit; 1175 1176 if (nmp->nm_sotype != SOCK_DGRAM) 1177 rexmit = (rep->r_flags & R_REXMITTED) != 0; 1178 else 1179 rexmit = rep->r_rexmit; 1180 *rexmitp = rexmit; 1181 } 1182 1183 /* 1184 * If there was a successful reply and a tprintf msg. 1185 * tprintf a response. 1186 */ 1187 if (!error && (rep->r_flags & R_TPRINTFMSG)) 1188 nfs_msg(rep->r_lwp, nmp->nm_mountp->mnt_stat.f_mntfromname, 1189 "is alive again"); 1190 mrep = rep->r_mrep; 1191 md = rep->r_md; 1192 dpos = rep->r_dpos; 1193 if (error) 1194 goto nfsmout; 1195 1196 /* 1197 * break down the rpc header and check if ok 1198 */ 1199 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 1200 if (*tl++ == rpc_msgdenied) { 1201 if (*tl == rpc_mismatch) 1202 error = EOPNOTSUPP; 1203 else if ((nmp->nm_flag & NFSMNT_KERB) && *tl++ == rpc_autherr) { 1204 if (!failed_auth) { 1205 failed_auth++; 1206 mheadend->m_next = (struct mbuf *)0; 1207 m_freem(mrep); 1208 m_freem(rep->r_mreq); 1209 goto kerbauth; 1210 } else 1211 error = EAUTH; 1212 } else 1213 error = EACCES; 1214 m_freem(mrep); 1215 goto nfsmout; 1216 } 1217 1218 /* 1219 * Grab any Kerberos verifier, otherwise just throw it away. 1220 */ 1221 verf_type = fxdr_unsigned(int, *tl++); 1222 i = fxdr_unsigned(int32_t, *tl); 1223 if ((nmp->nm_flag & NFSMNT_KERB) && verf_type == RPCAUTH_KERB4) { 1224 error = nfs_savenickauth(nmp, cred, i, key, &md, &dpos, mrep); 1225 if (error) 1226 goto nfsmout; 1227 } else if (i > 0) 1228 nfsm_adv(nfsm_rndup(i)); 1229 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1230 /* 0 == ok */ 1231 if (*tl == 0) { 1232 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1233 if (*tl != 0) { 1234 error = fxdr_unsigned(int, *tl); 1235 switch (error) { 1236 case NFSERR_PERM: 1237 error = EPERM; 1238 break; 1239 1240 case NFSERR_NOENT: 1241 error = ENOENT; 1242 break; 1243 1244 case NFSERR_IO: 1245 error = EIO; 1246 break; 1247 1248 case NFSERR_NXIO: 1249 error = ENXIO; 1250 break; 1251 1252 case NFSERR_ACCES: 1253 error = EACCES; 1254 if (!retry_cred) 1255 break; 1256 m_freem(mrep); 1257 m_freem(rep->r_mreq); 1258 FREE(rep, M_NFSREQ); 1259 use_opencred = !use_opencred; 1260 if (mrest_backup == NULL) { 1261 /* m_copym failure */ 1262 KASSERT( 1263 kauth_cred_getrefcnt(acred) == 1); 1264 kauth_cred_free(acred); 1265 return ENOMEM; 1266 } 1267 mrest = mrest_backup; 1268 mrest_backup = NULL; 1269 cred = origcred; 1270 error = 0; 1271 retry_cred = false; 1272 goto tryagain_cred; 1273 1274 case NFSERR_EXIST: 1275 error = EEXIST; 1276 break; 1277 1278 case NFSERR_XDEV: 1279 error = EXDEV; 1280 break; 1281 1282 case NFSERR_NODEV: 1283 error = ENODEV; 1284 break; 1285 1286 case NFSERR_NOTDIR: 1287 error = ENOTDIR; 1288 break; 1289 1290 case NFSERR_ISDIR: 1291 error = EISDIR; 1292 break; 1293 1294 case NFSERR_INVAL: 1295 error = EINVAL; 1296 break; 1297 1298 case NFSERR_FBIG: 1299 error = EFBIG; 1300 break; 1301 1302 case NFSERR_NOSPC: 1303 error = ENOSPC; 1304 break; 1305 1306 case NFSERR_ROFS: 1307 error = EROFS; 1308 break; 1309 1310 case NFSERR_MLINK: 1311 error = EMLINK; 1312 break; 1313 1314 case NFSERR_TIMEDOUT: 1315 error = ETIMEDOUT; 1316 break; 1317 1318 case NFSERR_NAMETOL: 1319 error = ENAMETOOLONG; 1320 break; 1321 1322 case NFSERR_NOTEMPTY: 1323 error = ENOTEMPTY; 1324 break; 1325 1326 case NFSERR_DQUOT: 1327 error = EDQUOT; 1328 break; 1329 1330 case NFSERR_STALE: 1331 /* 1332 * If the File Handle was stale, invalidate the 1333 * lookup cache, just in case. 1334 */ 1335 error = ESTALE; 1336 cache_purge(NFSTOV(np)); 1337 break; 1338 1339 case NFSERR_REMOTE: 1340 error = EREMOTE; 1341 break; 1342 1343 case NFSERR_WFLUSH: 1344 case NFSERR_BADHANDLE: 1345 case NFSERR_NOT_SYNC: 1346 case NFSERR_BAD_COOKIE: 1347 error = EINVAL; 1348 break; 1349 1350 case NFSERR_NOTSUPP: 1351 error = ENOTSUP; 1352 break; 1353 1354 case NFSERR_TOOSMALL: 1355 case NFSERR_SERVERFAULT: 1356 case NFSERR_BADTYPE: 1357 error = EINVAL; 1358 break; 1359 1360 case NFSERR_TRYLATER: 1361 if ((nmp->nm_flag & NFSMNT_NFSV3) == 0) 1362 break; 1363 m_freem(mrep); 1364 error = 0; 1365 waituntil = time_second + trylater_delay; 1366 while (time_second < waituntil) { 1367 tsleep(&lbolt, PSOCK, "nfstrylater", 0); 1368 } 1369 trylater_delay *= NFS_TRYLATERDELMUL; 1370 if (trylater_delay > NFS_TRYLATERDELMAX) 1371 trylater_delay = NFS_TRYLATERDELMAX; 1372 /* 1373 * RFC1813: 1374 * The client should wait and then try 1375 * the request with a new RPC transaction ID. 1376 */ 1377 nfs_renewxid(rep); 1378 goto tryagain; 1379 1380 default: 1381 #ifdef DIAGNOSTIC 1382 printf("Invalid rpc error code %d\n", error); 1383 #endif 1384 error = EINVAL; 1385 break; 1386 } 1387 1388 if (nmp->nm_flag & NFSMNT_NFSV3) { 1389 *mrp = mrep; 1390 *mdp = md; 1391 *dposp = dpos; 1392 error |= NFSERR_RETERR; 1393 } else 1394 m_freem(mrep); 1395 goto nfsmout; 1396 } 1397 1398 /* 1399 * note which credential worked to minimize number of retries. 1400 */ 1401 if (use_opencred) 1402 np->n_flag |= NUSEOPENCRED; 1403 else 1404 np->n_flag &= ~NUSEOPENCRED; 1405 1406 *mrp = mrep; 1407 *mdp = md; 1408 *dposp = dpos; 1409 1410 KASSERT(error == 0); 1411 goto nfsmout; 1412 } 1413 m_freem(mrep); 1414 error = EPROTONOSUPPORT; 1415 nfsmout: 1416 KASSERT(kauth_cred_getrefcnt(acred) == 1); 1417 kauth_cred_free(acred); 1418 m_freem(rep->r_mreq); 1419 free((void *)rep, M_NFSREQ); 1420 m_freem(mrest_backup); 1421 return (error); 1422 } 1423 #endif /* NFS */ 1424 1425 /* 1426 * Generate the rpc reply header 1427 * siz arg. is used to decide if adding a cluster is worthwhile 1428 */ 1429 int 1430 nfs_rephead(siz, nd, slp, err, cache, frev, mrq, mbp, bposp) 1431 int siz; 1432 struct nfsrv_descript *nd; 1433 struct nfssvc_sock *slp; 1434 int err; 1435 int cache; 1436 u_quad_t *frev; 1437 struct mbuf **mrq; 1438 struct mbuf **mbp; 1439 char **bposp; 1440 { 1441 u_int32_t *tl; 1442 struct mbuf *mreq; 1443 char *bpos; 1444 struct mbuf *mb; 1445 1446 mreq = m_gethdr(M_WAIT, MT_DATA); 1447 MCLAIM(mreq, &nfs_mowner); 1448 mb = mreq; 1449 /* 1450 * If this is a big reply, use a cluster else 1451 * try and leave leading space for the lower level headers. 1452 */ 1453 siz += RPC_REPLYSIZ; 1454 if (siz >= max_datalen) { 1455 m_clget(mreq, M_WAIT); 1456 } else 1457 mreq->m_data += max_hdr; 1458 tl = mtod(mreq, u_int32_t *); 1459 mreq->m_len = 6 * NFSX_UNSIGNED; 1460 bpos = ((char *)tl) + mreq->m_len; 1461 *tl++ = txdr_unsigned(nd->nd_retxid); 1462 *tl++ = rpc_reply; 1463 if (err == ERPCMISMATCH || (err & NFSERR_AUTHERR)) { 1464 *tl++ = rpc_msgdenied; 1465 if (err & NFSERR_AUTHERR) { 1466 *tl++ = rpc_autherr; 1467 *tl = txdr_unsigned(err & ~NFSERR_AUTHERR); 1468 mreq->m_len -= NFSX_UNSIGNED; 1469 bpos -= NFSX_UNSIGNED; 1470 } else { 1471 *tl++ = rpc_mismatch; 1472 *tl++ = txdr_unsigned(RPC_VER2); 1473 *tl = txdr_unsigned(RPC_VER2); 1474 } 1475 } else { 1476 *tl++ = rpc_msgaccepted; 1477 1478 /* 1479 * For Kerberos authentication, we must send the nickname 1480 * verifier back, otherwise just RPCAUTH_NULL. 1481 */ 1482 if (nd->nd_flag & ND_KERBFULL) { 1483 struct nfsuid *nuidp; 1484 struct timeval ktvin, ktvout; 1485 1486 memset(&ktvout, 0, sizeof ktvout); /* XXX gcc */ 1487 1488 LIST_FOREACH(nuidp, 1489 NUIDHASH(slp, kauth_cred_geteuid(nd->nd_cr)), 1490 nu_hash) { 1491 if (kauth_cred_geteuid(nuidp->nu_cr) == 1492 kauth_cred_geteuid(nd->nd_cr) && 1493 (!nd->nd_nam2 || netaddr_match( 1494 NU_NETFAM(nuidp), &nuidp->nu_haddr, 1495 nd->nd_nam2))) 1496 break; 1497 } 1498 if (nuidp) { 1499 ktvin.tv_sec = 1500 txdr_unsigned(nuidp->nu_timestamp.tv_sec 1501 - 1); 1502 ktvin.tv_usec = 1503 txdr_unsigned(nuidp->nu_timestamp.tv_usec); 1504 1505 /* 1506 * Encrypt the timestamp in ecb mode using the 1507 * session key. 1508 */ 1509 #ifdef NFSKERB 1510 XXX 1511 #endif 1512 1513 *tl++ = rpc_auth_kerb; 1514 *tl++ = txdr_unsigned(3 * NFSX_UNSIGNED); 1515 *tl = ktvout.tv_sec; 1516 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 1517 *tl++ = ktvout.tv_usec; 1518 *tl++ = txdr_unsigned( 1519 kauth_cred_geteuid(nuidp->nu_cr)); 1520 } else { 1521 *tl++ = 0; 1522 *tl++ = 0; 1523 } 1524 } else { 1525 *tl++ = 0; 1526 *tl++ = 0; 1527 } 1528 switch (err) { 1529 case EPROGUNAVAIL: 1530 *tl = txdr_unsigned(RPC_PROGUNAVAIL); 1531 break; 1532 case EPROGMISMATCH: 1533 *tl = txdr_unsigned(RPC_PROGMISMATCH); 1534 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1535 *tl++ = txdr_unsigned(2); 1536 *tl = txdr_unsigned(3); 1537 break; 1538 case EPROCUNAVAIL: 1539 *tl = txdr_unsigned(RPC_PROCUNAVAIL); 1540 break; 1541 case EBADRPC: 1542 *tl = txdr_unsigned(RPC_GARBAGE); 1543 break; 1544 default: 1545 *tl = 0; 1546 if (err != NFSERR_RETVOID) { 1547 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1548 if (err) 1549 *tl = txdr_unsigned(nfsrv_errmap(nd, err)); 1550 else 1551 *tl = 0; 1552 } 1553 break; 1554 }; 1555 } 1556 1557 if (mrq != NULL) 1558 *mrq = mreq; 1559 *mbp = mb; 1560 *bposp = bpos; 1561 if (err != 0 && err != NFSERR_RETVOID) 1562 nfsstats.srvrpc_errs++; 1563 return (0); 1564 } 1565 1566 /* 1567 * Nfs timer routine 1568 * Scan the nfsreq list and retranmit any requests that have timed out 1569 * To avoid retransmission attempts on STREAM sockets (in the future) make 1570 * sure to set the r_retry field to 0 (implies nm_retry == 0). 1571 * A non-NULL argument means 'initialize'. 1572 */ 1573 void 1574 nfs_timer(void *arg) 1575 { 1576 struct nfsreq *rep; 1577 struct mbuf *m; 1578 struct socket *so; 1579 struct nfsmount *nmp; 1580 int timeo; 1581 int s, error; 1582 #ifdef NFSSERVER 1583 struct timeval tv; 1584 struct nfssvc_sock *slp; 1585 u_quad_t cur_usec; 1586 #endif 1587 1588 if (arg != NULL) { 1589 callout_init(&nfs_timer_ch, 0); 1590 callout_setfunc(&nfs_timer_ch, nfs_timer, NULL); 1591 } 1592 1593 s = splsoftnet(); 1594 TAILQ_FOREACH(rep, &nfs_reqq, r_chain) { 1595 nmp = rep->r_nmp; 1596 if (rep->r_mrep || (rep->r_flags & R_SOFTTERM)) 1597 continue; 1598 if (nfs_sigintr(nmp, rep, rep->r_lwp)) { 1599 rep->r_flags |= R_SOFTTERM; 1600 continue; 1601 } 1602 if (rep->r_rtt >= 0) { 1603 rep->r_rtt++; 1604 if (nmp->nm_flag & NFSMNT_DUMBTIMR) 1605 timeo = nmp->nm_timeo; 1606 else 1607 timeo = NFS_RTO(nmp, proct[rep->r_procnum]); 1608 if (nmp->nm_timeouts > 0) 1609 timeo *= nfs_backoff[nmp->nm_timeouts - 1]; 1610 if (rep->r_rtt <= timeo) 1611 continue; 1612 if (nmp->nm_timeouts < 1613 (sizeof(nfs_backoff) / sizeof(nfs_backoff[0]))) 1614 nmp->nm_timeouts++; 1615 } 1616 /* 1617 * Check for server not responding 1618 */ 1619 if ((rep->r_flags & R_TPRINTFMSG) == 0 && 1620 rep->r_rexmit > nmp->nm_deadthresh) { 1621 nfs_msg(rep->r_lwp, 1622 nmp->nm_mountp->mnt_stat.f_mntfromname, 1623 "not responding"); 1624 rep->r_flags |= R_TPRINTFMSG; 1625 } 1626 if (rep->r_rexmit >= rep->r_retry) { /* too many */ 1627 nfsstats.rpctimeouts++; 1628 rep->r_flags |= R_SOFTTERM; 1629 continue; 1630 } 1631 if (nmp->nm_sotype != SOCK_DGRAM) { 1632 if (++rep->r_rexmit > NFS_MAXREXMIT) 1633 rep->r_rexmit = NFS_MAXREXMIT; 1634 continue; 1635 } 1636 if ((so = nmp->nm_so) == NULL) 1637 continue; 1638 1639 /* 1640 * If there is enough space and the window allows.. 1641 * Resend it 1642 * Set r_rtt to -1 in case we fail to send it now. 1643 */ 1644 rep->r_rtt = -1; 1645 if (sbspace(&so->so_snd) >= rep->r_mreq->m_pkthdr.len && 1646 ((nmp->nm_flag & NFSMNT_DUMBTIMR) || 1647 (rep->r_flags & R_SENT) || 1648 nmp->nm_sent < nmp->nm_cwnd) && 1649 (m = m_copym(rep->r_mreq, 0, M_COPYALL, M_DONTWAIT))){ 1650 if (so->so_state & SS_ISCONNECTED) 1651 error = (*so->so_proto->pr_usrreq)(so, PRU_SEND, m, 1652 (struct mbuf *)0, (struct mbuf *)0, (struct lwp *)0); 1653 else 1654 error = (*so->so_proto->pr_usrreq)(so, PRU_SEND, m, 1655 nmp->nm_nam, (struct mbuf *)0, (struct lwp *)0); 1656 if (error) { 1657 if (NFSIGNORE_SOERROR(nmp->nm_soflags, error)) { 1658 #ifdef DEBUG 1659 printf("nfs_timer: ignoring error %d\n", 1660 error); 1661 #endif 1662 so->so_error = 0; 1663 } 1664 } else { 1665 /* 1666 * Iff first send, start timing 1667 * else turn timing off, backoff timer 1668 * and divide congestion window by 2. 1669 */ 1670 if (rep->r_flags & R_SENT) { 1671 rep->r_flags &= ~R_TIMING; 1672 if (++rep->r_rexmit > NFS_MAXREXMIT) 1673 rep->r_rexmit = NFS_MAXREXMIT; 1674 nmp->nm_cwnd >>= 1; 1675 if (nmp->nm_cwnd < NFS_CWNDSCALE) 1676 nmp->nm_cwnd = NFS_CWNDSCALE; 1677 nfsstats.rpcretries++; 1678 } else { 1679 rep->r_flags |= R_SENT; 1680 nmp->nm_sent += NFS_CWNDSCALE; 1681 } 1682 rep->r_rtt = 0; 1683 } 1684 } 1685 } 1686 1687 #ifdef NFSSERVER 1688 /* 1689 * Scan the write gathering queues for writes that need to be 1690 * completed now. 1691 */ 1692 getmicrotime(&tv); 1693 cur_usec = (u_quad_t)tv.tv_sec * 1000000 + (u_quad_t)tv.tv_usec; 1694 TAILQ_FOREACH(slp, &nfssvc_sockhead, ns_chain) { 1695 if (LIST_FIRST(&slp->ns_tq) && 1696 LIST_FIRST(&slp->ns_tq)->nd_time <= cur_usec) 1697 nfsrv_wakenfsd(slp); 1698 } 1699 #endif /* NFSSERVER */ 1700 splx(s); 1701 callout_schedule(&nfs_timer_ch, nfs_ticks); 1702 } 1703 1704 /* 1705 * Test for a termination condition pending on the process. 1706 * This is used for NFSMNT_INT mounts. 1707 */ 1708 int 1709 nfs_sigintr(nmp, rep, l) 1710 struct nfsmount *nmp; 1711 struct nfsreq *rep; 1712 struct lwp *l; 1713 { 1714 sigset_t ss; 1715 1716 if (rep && (rep->r_flags & R_SOFTTERM)) 1717 return (EINTR); 1718 if (!(nmp->nm_flag & NFSMNT_INT)) 1719 return (0); 1720 if (l) { 1721 sigpending1(l, &ss); 1722 #if 0 1723 sigminusset(&l->l_proc->p_sigctx.ps_sigignore, &ss); 1724 #endif 1725 if (sigismember(&ss, SIGINT) || sigismember(&ss, SIGTERM) || 1726 sigismember(&ss, SIGKILL) || sigismember(&ss, SIGHUP) || 1727 sigismember(&ss, SIGQUIT)) 1728 return (EINTR); 1729 } 1730 return (0); 1731 } 1732 1733 /* 1734 * Lock a socket against others. 1735 * Necessary for STREAM sockets to ensure you get an entire rpc request/reply 1736 * and also to avoid race conditions between the processes with nfs requests 1737 * in progress when a reconnect is necessary. 1738 */ 1739 static int 1740 nfs_sndlock(struct nfsmount *nmp, struct nfsreq *rep) 1741 { 1742 struct lwp *l; 1743 int timeo = 0; 1744 bool catch = false; 1745 int error = 0; 1746 1747 if (rep) { 1748 l = rep->r_lwp; 1749 if (rep->r_nmp->nm_flag & NFSMNT_INT) 1750 catch = true; 1751 } else 1752 l = NULL; 1753 mutex_enter(&nmp->nm_lock); 1754 while ((nmp->nm_iflag & NFSMNT_SNDLOCK) != 0) { 1755 if (rep && nfs_sigintr(rep->r_nmp, rep, l)) { 1756 error = EINTR; 1757 goto quit; 1758 } 1759 if (catch) { 1760 cv_timedwait_sig(&nmp->nm_sndcv, &nmp->nm_lock, timeo); 1761 } else { 1762 cv_timedwait(&nmp->nm_sndcv, &nmp->nm_lock, timeo); 1763 } 1764 if (catch) { 1765 catch = false; 1766 timeo = 2 * hz; 1767 } 1768 } 1769 nmp->nm_iflag |= NFSMNT_SNDLOCK; 1770 quit: 1771 mutex_exit(&nmp->nm_lock); 1772 return error; 1773 } 1774 1775 /* 1776 * Unlock the stream socket for others. 1777 */ 1778 static void 1779 nfs_sndunlock(struct nfsmount *nmp) 1780 { 1781 1782 mutex_enter(&nmp->nm_lock); 1783 if ((nmp->nm_iflag & NFSMNT_SNDLOCK) == 0) 1784 panic("nfs sndunlock"); 1785 nmp->nm_iflag &= ~NFSMNT_SNDLOCK; 1786 cv_signal(&nmp->nm_sndcv); 1787 mutex_exit(&nmp->nm_lock); 1788 } 1789 1790 static int 1791 nfs_rcvlock(struct nfsmount *nmp, struct nfsreq *rep) 1792 { 1793 int *flagp = &nmp->nm_iflag; 1794 int slptimeo = 0; 1795 bool catch; 1796 int error = 0; 1797 1798 KASSERT(nmp == rep->r_nmp); 1799 1800 catch = (nmp->nm_flag & NFSMNT_INT) != 0; 1801 mutex_enter(&nmp->nm_lock); 1802 while (/* CONSTCOND */ true) { 1803 if (*flagp & NFSMNT_DISMNT) { 1804 cv_signal(&nmp->nm_disconcv); 1805 error = EIO; 1806 break; 1807 } 1808 /* If our reply was received while we were sleeping, 1809 * then just return without taking the lock to avoid a 1810 * situation where a single iod could 'capture' the 1811 * receive lock. 1812 */ 1813 if (rep->r_mrep != NULL) { 1814 error = EALREADY; 1815 break; 1816 } 1817 if (nfs_sigintr(rep->r_nmp, rep, rep->r_lwp)) { 1818 error = EINTR; 1819 break; 1820 } 1821 if ((*flagp & NFSMNT_RCVLOCK) == 0) { 1822 *flagp |= NFSMNT_RCVLOCK; 1823 break; 1824 } 1825 if (catch) { 1826 cv_timedwait_sig(&nmp->nm_rcvcv, &nmp->nm_lock, 1827 slptimeo); 1828 } else { 1829 cv_timedwait(&nmp->nm_rcvcv, &nmp->nm_lock, 1830 slptimeo); 1831 } 1832 if (catch) { 1833 catch = false; 1834 slptimeo = 2 * hz; 1835 } 1836 } 1837 mutex_exit(&nmp->nm_lock); 1838 return error; 1839 } 1840 1841 /* 1842 * Unlock the stream socket for others. 1843 */ 1844 static void 1845 nfs_rcvunlock(struct nfsmount *nmp) 1846 { 1847 1848 mutex_enter(&nmp->nm_lock); 1849 if ((nmp->nm_iflag & NFSMNT_RCVLOCK) == 0) 1850 panic("nfs rcvunlock"); 1851 nmp->nm_iflag &= ~NFSMNT_RCVLOCK; 1852 cv_broadcast(&nmp->nm_rcvcv); 1853 mutex_exit(&nmp->nm_lock); 1854 } 1855 1856 /* 1857 * Parse an RPC request 1858 * - verify it 1859 * - allocate and fill in the cred. 1860 */ 1861 int 1862 nfs_getreq(nd, nfsd, has_header) 1863 struct nfsrv_descript *nd; 1864 struct nfsd *nfsd; 1865 int has_header; 1866 { 1867 int len, i; 1868 u_int32_t *tl; 1869 int32_t t1; 1870 struct uio uio; 1871 struct iovec iov; 1872 char *dpos, *cp2, *cp; 1873 u_int32_t nfsvers, auth_type; 1874 uid_t nickuid; 1875 int error = 0, ticklen; 1876 struct mbuf *mrep, *md; 1877 struct nfsuid *nuidp; 1878 struct timeval tvin, tvout; 1879 1880 memset(&tvout, 0, sizeof tvout); /* XXX gcc */ 1881 1882 KASSERT(nd->nd_cr == NULL); 1883 mrep = nd->nd_mrep; 1884 md = nd->nd_md; 1885 dpos = nd->nd_dpos; 1886 if (has_header) { 1887 nfsm_dissect(tl, u_int32_t *, 10 * NFSX_UNSIGNED); 1888 nd->nd_retxid = fxdr_unsigned(u_int32_t, *tl++); 1889 if (*tl++ != rpc_call) { 1890 m_freem(mrep); 1891 return (EBADRPC); 1892 } 1893 } else 1894 nfsm_dissect(tl, u_int32_t *, 8 * NFSX_UNSIGNED); 1895 nd->nd_repstat = 0; 1896 nd->nd_flag = 0; 1897 if (*tl++ != rpc_vers) { 1898 nd->nd_repstat = ERPCMISMATCH; 1899 nd->nd_procnum = NFSPROC_NOOP; 1900 return (0); 1901 } 1902 if (*tl != nfs_prog) { 1903 nd->nd_repstat = EPROGUNAVAIL; 1904 nd->nd_procnum = NFSPROC_NOOP; 1905 return (0); 1906 } 1907 tl++; 1908 nfsvers = fxdr_unsigned(u_int32_t, *tl++); 1909 if (nfsvers < NFS_VER2 || nfsvers > NFS_VER3) { 1910 nd->nd_repstat = EPROGMISMATCH; 1911 nd->nd_procnum = NFSPROC_NOOP; 1912 return (0); 1913 } 1914 if (nfsvers == NFS_VER3) 1915 nd->nd_flag = ND_NFSV3; 1916 nd->nd_procnum = fxdr_unsigned(u_int32_t, *tl++); 1917 if (nd->nd_procnum == NFSPROC_NULL) 1918 return (0); 1919 if (nd->nd_procnum > NFSPROC_COMMIT || 1920 (!nd->nd_flag && nd->nd_procnum > NFSV2PROC_STATFS)) { 1921 nd->nd_repstat = EPROCUNAVAIL; 1922 nd->nd_procnum = NFSPROC_NOOP; 1923 return (0); 1924 } 1925 if ((nd->nd_flag & ND_NFSV3) == 0) 1926 nd->nd_procnum = nfsv3_procid[nd->nd_procnum]; 1927 auth_type = *tl++; 1928 len = fxdr_unsigned(int, *tl++); 1929 if (len < 0 || len > RPCAUTH_MAXSIZ) { 1930 m_freem(mrep); 1931 return (EBADRPC); 1932 } 1933 1934 nd->nd_flag &= ~ND_KERBAUTH; 1935 /* 1936 * Handle auth_unix or auth_kerb. 1937 */ 1938 if (auth_type == rpc_auth_unix) { 1939 uid_t uid; 1940 gid_t gid, *grbuf; 1941 1942 nd->nd_cr = kauth_cred_alloc(); 1943 len = fxdr_unsigned(int, *++tl); 1944 if (len < 0 || len > NFS_MAXNAMLEN) { 1945 m_freem(mrep); 1946 error = EBADRPC; 1947 goto errout; 1948 } 1949 nfsm_adv(nfsm_rndup(len)); 1950 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 1951 1952 uid = fxdr_unsigned(uid_t, *tl++); 1953 gid = fxdr_unsigned(gid_t, *tl++); 1954 kauth_cred_setuid(nd->nd_cr, uid); 1955 kauth_cred_seteuid(nd->nd_cr, uid); 1956 kauth_cred_setsvuid(nd->nd_cr, uid); 1957 kauth_cred_setgid(nd->nd_cr, gid); 1958 kauth_cred_setegid(nd->nd_cr, gid); 1959 kauth_cred_setsvgid(nd->nd_cr, gid); 1960 1961 len = fxdr_unsigned(int, *tl); 1962 if (len < 0 || len > RPCAUTH_UNIXGIDS) { 1963 m_freem(mrep); 1964 error = EBADRPC; 1965 goto errout; 1966 } 1967 nfsm_dissect(tl, u_int32_t *, (len + 2) * NFSX_UNSIGNED); 1968 1969 grbuf = malloc(len * sizeof(gid_t), M_TEMP, M_WAITOK); 1970 for (i = 0; i < len; i++) { 1971 if (i < NGROUPS) /* XXX elad */ 1972 grbuf[i] = fxdr_unsigned(gid_t, *tl++); 1973 else 1974 tl++; 1975 } 1976 kauth_cred_setgroups(nd->nd_cr, grbuf, min(len, NGROUPS), -1, 1977 UIO_SYSSPACE); 1978 free(grbuf, M_TEMP); 1979 1980 len = fxdr_unsigned(int, *++tl); 1981 if (len < 0 || len > RPCAUTH_MAXSIZ) { 1982 m_freem(mrep); 1983 error = EBADRPC; 1984 goto errout; 1985 } 1986 if (len > 0) 1987 nfsm_adv(nfsm_rndup(len)); 1988 } else if (auth_type == rpc_auth_kerb) { 1989 switch (fxdr_unsigned(int, *tl++)) { 1990 case RPCAKN_FULLNAME: 1991 ticklen = fxdr_unsigned(int, *tl); 1992 *((u_int32_t *)nfsd->nfsd_authstr) = *tl; 1993 uio.uio_resid = nfsm_rndup(ticklen) + NFSX_UNSIGNED; 1994 nfsd->nfsd_authlen = uio.uio_resid + NFSX_UNSIGNED; 1995 if (uio.uio_resid > (len - 2 * NFSX_UNSIGNED)) { 1996 m_freem(mrep); 1997 error = EBADRPC; 1998 goto errout; 1999 } 2000 uio.uio_offset = 0; 2001 uio.uio_iov = &iov; 2002 uio.uio_iovcnt = 1; 2003 UIO_SETUP_SYSSPACE(&uio); 2004 iov.iov_base = (void *)&nfsd->nfsd_authstr[4]; 2005 iov.iov_len = RPCAUTH_MAXSIZ - 4; 2006 nfsm_mtouio(&uio, uio.uio_resid); 2007 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2008 if (*tl++ != rpc_auth_kerb || 2009 fxdr_unsigned(int, *tl) != 4 * NFSX_UNSIGNED) { 2010 printf("Bad kerb verifier\n"); 2011 nd->nd_repstat = (NFSERR_AUTHERR|AUTH_BADVERF); 2012 nd->nd_procnum = NFSPROC_NOOP; 2013 return (0); 2014 } 2015 nfsm_dissect(cp, void *, 4 * NFSX_UNSIGNED); 2016 tl = (u_int32_t *)cp; 2017 if (fxdr_unsigned(int, *tl) != RPCAKN_FULLNAME) { 2018 printf("Not fullname kerb verifier\n"); 2019 nd->nd_repstat = (NFSERR_AUTHERR|AUTH_BADVERF); 2020 nd->nd_procnum = NFSPROC_NOOP; 2021 return (0); 2022 } 2023 cp += NFSX_UNSIGNED; 2024 memcpy(nfsd->nfsd_verfstr, cp, 3 * NFSX_UNSIGNED); 2025 nfsd->nfsd_verflen = 3 * NFSX_UNSIGNED; 2026 nd->nd_flag |= ND_KERBFULL; 2027 nfsd->nfsd_flag |= NFSD_NEEDAUTH; 2028 break; 2029 case RPCAKN_NICKNAME: 2030 if (len != 2 * NFSX_UNSIGNED) { 2031 printf("Kerb nickname short\n"); 2032 nd->nd_repstat = (NFSERR_AUTHERR|AUTH_BADCRED); 2033 nd->nd_procnum = NFSPROC_NOOP; 2034 return (0); 2035 } 2036 nickuid = fxdr_unsigned(uid_t, *tl); 2037 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2038 if (*tl++ != rpc_auth_kerb || 2039 fxdr_unsigned(int, *tl) != 3 * NFSX_UNSIGNED) { 2040 printf("Kerb nick verifier bad\n"); 2041 nd->nd_repstat = (NFSERR_AUTHERR|AUTH_BADVERF); 2042 nd->nd_procnum = NFSPROC_NOOP; 2043 return (0); 2044 } 2045 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2046 tvin.tv_sec = *tl++; 2047 tvin.tv_usec = *tl; 2048 2049 LIST_FOREACH(nuidp, NUIDHASH(nfsd->nfsd_slp, nickuid), 2050 nu_hash) { 2051 if (kauth_cred_geteuid(nuidp->nu_cr) == nickuid && 2052 (!nd->nd_nam2 || 2053 netaddr_match(NU_NETFAM(nuidp), 2054 &nuidp->nu_haddr, nd->nd_nam2))) 2055 break; 2056 } 2057 if (!nuidp) { 2058 nd->nd_repstat = 2059 (NFSERR_AUTHERR|AUTH_REJECTCRED); 2060 nd->nd_procnum = NFSPROC_NOOP; 2061 return (0); 2062 } 2063 2064 /* 2065 * Now, decrypt the timestamp using the session key 2066 * and validate it. 2067 */ 2068 #ifdef NFSKERB 2069 XXX 2070 #endif 2071 2072 tvout.tv_sec = fxdr_unsigned(long, tvout.tv_sec); 2073 tvout.tv_usec = fxdr_unsigned(long, tvout.tv_usec); 2074 if (nuidp->nu_expire < time_second || 2075 nuidp->nu_timestamp.tv_sec > tvout.tv_sec || 2076 (nuidp->nu_timestamp.tv_sec == tvout.tv_sec && 2077 nuidp->nu_timestamp.tv_usec > tvout.tv_usec)) { 2078 nuidp->nu_expire = 0; 2079 nd->nd_repstat = 2080 (NFSERR_AUTHERR|AUTH_REJECTVERF); 2081 nd->nd_procnum = NFSPROC_NOOP; 2082 return (0); 2083 } 2084 kauth_cred_hold(nuidp->nu_cr); 2085 nd->nd_cr = nuidp->nu_cr; 2086 nd->nd_flag |= ND_KERBNICK; 2087 } 2088 } else { 2089 nd->nd_repstat = (NFSERR_AUTHERR | AUTH_REJECTCRED); 2090 nd->nd_procnum = NFSPROC_NOOP; 2091 return (0); 2092 } 2093 2094 nd->nd_md = md; 2095 nd->nd_dpos = dpos; 2096 KASSERT((nd->nd_cr == NULL && (nfsd->nfsd_flag & NFSD_NEEDAUTH) != 0) 2097 || (nd->nd_cr != NULL && (nfsd->nfsd_flag & NFSD_NEEDAUTH) == 0)); 2098 return (0); 2099 nfsmout: 2100 errout: 2101 KASSERT(error != 0); 2102 if (nd->nd_cr != NULL) { 2103 kauth_cred_free(nd->nd_cr); 2104 nd->nd_cr = NULL; 2105 } 2106 return (error); 2107 } 2108 2109 int 2110 nfs_msg(l, server, msg) 2111 struct lwp *l; 2112 const char *server, *msg; 2113 { 2114 tpr_t tpr; 2115 2116 if (l) 2117 tpr = tprintf_open(l->l_proc); 2118 else 2119 tpr = NULL; 2120 tprintf(tpr, "nfs server %s: %s\n", server, msg); 2121 tprintf_close(tpr); 2122 return (0); 2123 } 2124 2125 #ifdef NFSSERVER 2126 int (*nfsrv3_procs[NFS_NPROCS]) __P((struct nfsrv_descript *, 2127 struct nfssvc_sock *, struct lwp *, 2128 struct mbuf **)) = { 2129 nfsrv_null, 2130 nfsrv_getattr, 2131 nfsrv_setattr, 2132 nfsrv_lookup, 2133 nfsrv3_access, 2134 nfsrv_readlink, 2135 nfsrv_read, 2136 nfsrv_write, 2137 nfsrv_create, 2138 nfsrv_mkdir, 2139 nfsrv_symlink, 2140 nfsrv_mknod, 2141 nfsrv_remove, 2142 nfsrv_rmdir, 2143 nfsrv_rename, 2144 nfsrv_link, 2145 nfsrv_readdir, 2146 nfsrv_readdirplus, 2147 nfsrv_statfs, 2148 nfsrv_fsinfo, 2149 nfsrv_pathconf, 2150 nfsrv_commit, 2151 nfsrv_noop 2152 }; 2153 2154 /* 2155 * Socket upcall routine for the nfsd sockets. 2156 * The void *arg is a pointer to the "struct nfssvc_sock". 2157 * Essentially do as much as possible non-blocking, else punt and it will 2158 * be called with M_WAIT from an nfsd. 2159 */ 2160 void 2161 nfsrv_rcv(so, arg, waitflag) 2162 struct socket *so; 2163 void *arg; 2164 int waitflag; 2165 { 2166 struct nfssvc_sock *slp = (struct nfssvc_sock *)arg; 2167 struct mbuf *m; 2168 struct mbuf *mp, *nam; 2169 struct uio auio; 2170 int flags, error; 2171 int setflags = 0; 2172 2173 error = nfsdsock_lock(slp, (waitflag != M_DONTWAIT)); 2174 if (error) { 2175 setflags |= SLP_NEEDQ; 2176 goto dorecs_unlocked; 2177 } 2178 2179 KASSERT(so == slp->ns_so); 2180 #define NFS_TEST_HEAVY 2181 #ifdef NFS_TEST_HEAVY 2182 /* 2183 * Define this to test for nfsds handling this under heavy load. 2184 * 2185 * XXX it isn't safe to call so_receive from so_upcall context. 2186 */ 2187 if (waitflag == M_DONTWAIT) { 2188 setflags |= SLP_NEEDQ; 2189 goto dorecs; 2190 } 2191 #endif 2192 mutex_enter(&slp->ns_lock); 2193 slp->ns_flag &= ~SLP_NEEDQ; 2194 mutex_exit(&slp->ns_lock); 2195 if (so->so_type == SOCK_STREAM) { 2196 #ifndef NFS_TEST_HEAVY 2197 /* 2198 * If there are already records on the queue, defer soreceive() 2199 * to an nfsd so that there is feedback to the TCP layer that 2200 * the nfs servers are heavily loaded. 2201 */ 2202 if (slp->ns_rec && waitflag == M_DONTWAIT) { 2203 setflags |= SLP_NEEDQ; 2204 goto dorecs; 2205 } 2206 #endif 2207 2208 /* 2209 * Do soreceive(). 2210 */ 2211 auio.uio_resid = 1000000000; 2212 /* not need to setup uio_vmspace */ 2213 flags = MSG_DONTWAIT; 2214 error = (*so->so_receive)(so, &nam, &auio, &mp, NULL, &flags); 2215 if (error || mp == NULL) { 2216 if (error == EWOULDBLOCK) 2217 setflags |= SLP_NEEDQ; 2218 else 2219 setflags |= SLP_DISCONN; 2220 goto dorecs; 2221 } 2222 m = mp; 2223 m_claimm(m, &nfs_mowner); 2224 if (slp->ns_rawend) { 2225 slp->ns_rawend->m_next = m; 2226 slp->ns_cc += 1000000000 - auio.uio_resid; 2227 } else { 2228 slp->ns_raw = m; 2229 slp->ns_cc = 1000000000 - auio.uio_resid; 2230 } 2231 while (m->m_next) 2232 m = m->m_next; 2233 slp->ns_rawend = m; 2234 2235 /* 2236 * Now try and parse record(s) out of the raw stream data. 2237 */ 2238 error = nfsrv_getstream(slp, waitflag); 2239 if (error) { 2240 if (error == EPERM) 2241 setflags |= SLP_DISCONN; 2242 else 2243 setflags |= SLP_NEEDQ; 2244 } 2245 } else { 2246 do { 2247 auio.uio_resid = 1000000000; 2248 /* not need to setup uio_vmspace */ 2249 flags = MSG_DONTWAIT; 2250 error = (*so->so_receive)(so, &nam, &auio, &mp, NULL, 2251 &flags); 2252 if (mp) { 2253 if (nam) { 2254 m = nam; 2255 m->m_next = mp; 2256 } else 2257 m = mp; 2258 m_claimm(m, &nfs_mowner); 2259 if (slp->ns_recend) 2260 slp->ns_recend->m_nextpkt = m; 2261 else 2262 slp->ns_rec = m; 2263 slp->ns_recend = m; 2264 m->m_nextpkt = (struct mbuf *)0; 2265 } 2266 if (error) { 2267 if ((so->so_proto->pr_flags & PR_CONNREQUIRED) 2268 && error != EWOULDBLOCK) { 2269 setflags |= SLP_DISCONN; 2270 goto dorecs; 2271 } 2272 } 2273 } while (mp); 2274 } 2275 dorecs: 2276 nfsdsock_unlock(slp); 2277 2278 dorecs_unlocked: 2279 /* 2280 * Now try and process the request records, non-blocking. 2281 */ 2282 if (setflags) { 2283 mutex_enter(&slp->ns_lock); 2284 slp->ns_flag |= setflags; 2285 mutex_exit(&slp->ns_lock); 2286 } 2287 if (waitflag == M_DONTWAIT && 2288 (slp->ns_rec || (slp->ns_flag & (SLP_DISCONN | SLP_NEEDQ)) != 0)) { 2289 nfsrv_wakenfsd(slp); 2290 } 2291 } 2292 2293 int 2294 nfsdsock_lock(struct nfssvc_sock *slp, bool waitok) 2295 { 2296 2297 mutex_enter(&slp->ns_lock); 2298 while ((~slp->ns_flag & (SLP_BUSY|SLP_VALID)) == 0) { 2299 if (!waitok) { 2300 mutex_exit(&slp->ns_lock); 2301 return EWOULDBLOCK; 2302 } 2303 cv_wait(&slp->ns_cv, &slp->ns_lock); 2304 } 2305 if ((slp->ns_flag & SLP_VALID) == 0) { 2306 mutex_exit(&slp->ns_lock); 2307 return EINVAL; 2308 } 2309 KASSERT((slp->ns_flag & SLP_BUSY) == 0); 2310 slp->ns_flag |= SLP_BUSY; 2311 mutex_exit(&slp->ns_lock); 2312 2313 return 0; 2314 } 2315 2316 void 2317 nfsdsock_unlock(struct nfssvc_sock *slp) 2318 { 2319 2320 mutex_enter(&slp->ns_lock); 2321 KASSERT((slp->ns_flag & SLP_BUSY) != 0); 2322 cv_broadcast(&slp->ns_cv); 2323 slp->ns_flag &= ~SLP_BUSY; 2324 mutex_exit(&slp->ns_lock); 2325 } 2326 2327 int 2328 nfsdsock_drain(struct nfssvc_sock *slp) 2329 { 2330 int error = 0; 2331 2332 mutex_enter(&slp->ns_lock); 2333 if ((slp->ns_flag & SLP_VALID) == 0) { 2334 error = EINVAL; 2335 goto done; 2336 } 2337 slp->ns_flag &= ~SLP_VALID; 2338 while ((slp->ns_flag & SLP_BUSY) != 0) { 2339 cv_wait(&slp->ns_cv, &slp->ns_lock); 2340 } 2341 done: 2342 mutex_exit(&slp->ns_lock); 2343 2344 return error; 2345 } 2346 2347 /* 2348 * Try and extract an RPC request from the mbuf data list received on a 2349 * stream socket. The "waitflag" argument indicates whether or not it 2350 * can sleep. 2351 */ 2352 int 2353 nfsrv_getstream(slp, waitflag) 2354 struct nfssvc_sock *slp; 2355 int waitflag; 2356 { 2357 struct mbuf *m, **mpp; 2358 struct mbuf *recm; 2359 u_int32_t recmark; 2360 int error = 0; 2361 2362 KASSERT((slp->ns_flag & SLP_BUSY) != 0); 2363 for (;;) { 2364 if (slp->ns_reclen == 0) { 2365 if (slp->ns_cc < NFSX_UNSIGNED) { 2366 break; 2367 } 2368 m = slp->ns_raw; 2369 m_copydata(m, 0, NFSX_UNSIGNED, (void *)&recmark); 2370 m_adj(m, NFSX_UNSIGNED); 2371 slp->ns_cc -= NFSX_UNSIGNED; 2372 recmark = ntohl(recmark); 2373 slp->ns_reclen = recmark & ~0x80000000; 2374 if (recmark & 0x80000000) 2375 slp->ns_flag |= SLP_LASTFRAG; 2376 else 2377 slp->ns_flag &= ~SLP_LASTFRAG; 2378 if (slp->ns_reclen > NFS_MAXPACKET) { 2379 error = EPERM; 2380 break; 2381 } 2382 } 2383 2384 /* 2385 * Now get the record part. 2386 * 2387 * Note that slp->ns_reclen may be 0. Linux sometimes 2388 * generates 0-length records. 2389 */ 2390 if (slp->ns_cc == slp->ns_reclen) { 2391 recm = slp->ns_raw; 2392 slp->ns_raw = slp->ns_rawend = (struct mbuf *)0; 2393 slp->ns_cc = slp->ns_reclen = 0; 2394 } else if (slp->ns_cc > slp->ns_reclen) { 2395 recm = slp->ns_raw; 2396 m = m_split(recm, slp->ns_reclen, waitflag); 2397 if (m == NULL) { 2398 error = EWOULDBLOCK; 2399 break; 2400 } 2401 m_claimm(recm, &nfs_mowner); 2402 slp->ns_raw = m; 2403 if (m->m_next == NULL) 2404 slp->ns_rawend = m; 2405 slp->ns_cc -= slp->ns_reclen; 2406 slp->ns_reclen = 0; 2407 } else { 2408 break; 2409 } 2410 2411 /* 2412 * Accumulate the fragments into a record. 2413 */ 2414 mpp = &slp->ns_frag; 2415 while (*mpp) 2416 mpp = &((*mpp)->m_next); 2417 *mpp = recm; 2418 if (slp->ns_flag & SLP_LASTFRAG) { 2419 if (slp->ns_recend) 2420 slp->ns_recend->m_nextpkt = slp->ns_frag; 2421 else 2422 slp->ns_rec = slp->ns_frag; 2423 slp->ns_recend = slp->ns_frag; 2424 slp->ns_frag = (struct mbuf *)0; 2425 } 2426 } 2427 2428 return error; 2429 } 2430 2431 /* 2432 * Parse an RPC header. 2433 */ 2434 int 2435 nfsrv_dorec(slp, nfsd, ndp) 2436 struct nfssvc_sock *slp; 2437 struct nfsd *nfsd; 2438 struct nfsrv_descript **ndp; 2439 { 2440 struct mbuf *m, *nam; 2441 struct nfsrv_descript *nd; 2442 int error; 2443 2444 *ndp = NULL; 2445 2446 if (nfsdsock_lock(slp, true)) { 2447 return ENOBUFS; 2448 } 2449 m = slp->ns_rec; 2450 if (m == NULL) { 2451 nfsdsock_unlock(slp); 2452 return ENOBUFS; 2453 } 2454 slp->ns_rec = m->m_nextpkt; 2455 if (slp->ns_rec) 2456 m->m_nextpkt = NULL; 2457 else 2458 slp->ns_recend = NULL; 2459 nfsdsock_unlock(slp); 2460 2461 if (m->m_type == MT_SONAME) { 2462 nam = m; 2463 m = m->m_next; 2464 nam->m_next = NULL; 2465 } else 2466 nam = NULL; 2467 nd = nfsdreq_alloc(); 2468 nd->nd_md = nd->nd_mrep = m; 2469 nd->nd_nam2 = nam; 2470 nd->nd_dpos = mtod(m, void *); 2471 error = nfs_getreq(nd, nfsd, true); 2472 if (error) { 2473 m_freem(nam); 2474 nfsdreq_free(nd); 2475 return (error); 2476 } 2477 *ndp = nd; 2478 nfsd->nfsd_nd = nd; 2479 return (0); 2480 } 2481 2482 /* 2483 * Search for a sleeping nfsd and wake it up. 2484 * SIDE EFFECT: If none found, set NFSD_CHECKSLP flag, so that one of the 2485 * running nfsds will go look for the work in the nfssvc_sock list. 2486 */ 2487 void 2488 nfsrv_wakenfsd(slp) 2489 struct nfssvc_sock *slp; 2490 { 2491 struct nfsd *nd; 2492 2493 if ((slp->ns_flag & SLP_VALID) == 0) 2494 return; 2495 mutex_enter(&nfsd_lock); 2496 if (slp->ns_flag & SLP_DOREC) { 2497 mutex_exit(&nfsd_lock); 2498 return; 2499 } 2500 nd = SLIST_FIRST(&nfsd_idle_head); 2501 if (nd) { 2502 SLIST_REMOVE_HEAD(&nfsd_idle_head, nfsd_idle); 2503 if (nd->nfsd_slp) 2504 panic("nfsd wakeup"); 2505 slp->ns_sref++; 2506 KASSERT(slp->ns_sref > 0); 2507 nd->nfsd_slp = slp; 2508 cv_signal(&nd->nfsd_cv); 2509 } else { 2510 slp->ns_flag |= SLP_DOREC; 2511 nfsd_head_flag |= NFSD_CHECKSLP; 2512 TAILQ_INSERT_TAIL(&nfssvc_sockpending, slp, ns_pending); 2513 } 2514 mutex_exit(&nfsd_lock); 2515 } 2516 2517 int 2518 nfsdsock_sendreply(struct nfssvc_sock *slp, struct nfsrv_descript *nd) 2519 { 2520 int error; 2521 2522 if (nd->nd_mrep != NULL) { 2523 m_freem(nd->nd_mrep); 2524 nd->nd_mrep = NULL; 2525 } 2526 2527 mutex_enter(&slp->ns_lock); 2528 if ((slp->ns_flag & SLP_SENDING) != 0) { 2529 SIMPLEQ_INSERT_TAIL(&slp->ns_sendq, nd, nd_sendq); 2530 mutex_exit(&slp->ns_lock); 2531 return 0; 2532 } 2533 KASSERT(SIMPLEQ_EMPTY(&slp->ns_sendq)); 2534 slp->ns_flag |= SLP_SENDING; 2535 mutex_exit(&slp->ns_lock); 2536 2537 again: 2538 error = nfs_send(slp->ns_so, nd->nd_nam2, nd->nd_mreq, NULL, curlwp); 2539 if (nd->nd_nam2) { 2540 m_free(nd->nd_nam2); 2541 } 2542 nfsdreq_free(nd); 2543 2544 mutex_enter(&slp->ns_lock); 2545 KASSERT((slp->ns_flag & SLP_SENDING) != 0); 2546 nd = SIMPLEQ_FIRST(&slp->ns_sendq); 2547 if (nd != NULL) { 2548 SIMPLEQ_REMOVE_HEAD(&slp->ns_sendq, nd_sendq); 2549 mutex_exit(&slp->ns_lock); 2550 goto again; 2551 } 2552 slp->ns_flag &= ~SLP_SENDING; 2553 mutex_exit(&slp->ns_lock); 2554 2555 return error; 2556 } 2557 #endif /* NFSSERVER */ 2558 2559 #if defined(NFSSERVER) || (defined(NFS) && !defined(NFS_V2_ONLY)) 2560 static struct pool nfs_srvdesc_pool; 2561 2562 void 2563 nfsdreq_init(void) 2564 { 2565 2566 pool_init(&nfs_srvdesc_pool, sizeof(struct nfsrv_descript), 2567 0, 0, 0, "nfsrvdescpl", &pool_allocator_nointr, IPL_NONE); 2568 } 2569 2570 struct nfsrv_descript * 2571 nfsdreq_alloc(void) 2572 { 2573 struct nfsrv_descript *nd; 2574 2575 nd = pool_get(&nfs_srvdesc_pool, PR_WAITOK); 2576 nd->nd_cr = NULL; 2577 return nd; 2578 } 2579 2580 void 2581 nfsdreq_free(struct nfsrv_descript *nd) 2582 { 2583 kauth_cred_t cr; 2584 2585 cr = nd->nd_cr; 2586 if (cr != NULL) { 2587 kauth_cred_free(cr); 2588 } 2589 pool_put(&nfs_srvdesc_pool, nd); 2590 } 2591 #endif /* defined(NFSSERVER) || (defined(NFS) && !defined(NFS_V2_ONLY)) */ 2592
Indexes created Sun Sep 21 20:09:37 GMT 2025