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Expand PMF_FN_* macros.
[netbsd-mini2440.git] / sys / nfs / nfs_socket.c
blob4e8b7fdbec4be01ef559b2b4b2f9a4fa4281cecd
1 /* $NetBSD: nfs_socket.c,v 1.183 2009/12/06 18:00:15 dyoung 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 1.183 2009/12/06 18:00:15 dyoung Exp $");
43
44 #ifdef _KERNEL_OPT
45 #include "fs_nfs.h"
46 #include "opt_nfs.h"
47 #include "opt_mbuftrace.h"
48 #endif
49
50 #include <sys/param.h>
51 #include <sys/systm.h>
52 #include <sys/evcnt.h>
53 #include <sys/callout.h>
54 #include <sys/proc.h>
55 #include <sys/mount.h>
56 #include <sys/kernel.h>
57 #include <sys/kmem.h>
58 #include <sys/mbuf.h>
59 #include <sys/vnode.h>
60 #include <sys/domain.h>
61 #include <sys/protosw.h>
62 #include <sys/socket.h>
63 #include <sys/socketvar.h>
64 #include <sys/syslog.h>
65 #include <sys/tprintf.h>
66 #include <sys/namei.h>
67 #include <sys/signal.h>
68 #include <sys/signalvar.h>
69 #include <sys/kauth.h>
70
71 #include <netinet/in.h>
72 #include <netinet/tcp.h>
73
74 #include <nfs/rpcv2.h>
75 #include <nfs/nfsproto.h>
76 #include <nfs/nfs.h>
77 #include <nfs/xdr_subs.h>
78 #include <nfs/nfsm_subs.h>
79 #include <nfs/nfsmount.h>
80 #include <nfs/nfsnode.h>
81 #include <nfs/nfsrtt.h>
82 #include <nfs/nfs_var.h>
83
84 #ifdef MBUFTRACE
85 struct mowner nfs_mowner = MOWNER_INIT("nfs","");
86 #endif
87
88 /*
89 * Estimate rto for an nfs rpc sent via. an unreliable datagram.
90 * Use the mean and mean deviation of rtt for the appropriate type of rpc
91 * for the frequent rpcs and a default for the others.
92 * The justification for doing "other" this way is that these rpcs
93 * happen so infrequently that timer est. would probably be stale.
94 * Also, since many of these rpcs are
95 * non-idempotent, a conservative timeout is desired.
96 * getattr, lookup - A+2D
97 * read, write - A+4D
98 * other - nm_timeo
99 */
100 #define NFS_RTO(n, t) \
101 ((t) == 0 ? (n)->nm_timeo : \
102 ((t) < 3 ? \
103 (((((n)->nm_srtt[t-1] + 3) >> 2) + (n)->nm_sdrtt[t-1] + 1) >> 1) : \
104 ((((n)->nm_srtt[t-1] + 7) >> 3) + (n)->nm_sdrtt[t-1] + 1)))
105 #define NFS_SRTT(r) (r)->r_nmp->nm_srtt[proct[(r)->r_procnum] - 1]
106 #define NFS_SDRTT(r) (r)->r_nmp->nm_sdrtt[proct[(r)->r_procnum] - 1]
107 /*
108 * External data, mostly RPC constants in XDR form
109 */
110 extern u_int32_t rpc_reply, rpc_msgdenied, rpc_mismatch, rpc_vers,
111 rpc_auth_unix, rpc_msgaccepted, rpc_call, rpc_autherr,
112 rpc_auth_kerb;
113 extern u_int32_t nfs_prog;
114 extern const int nfsv3_procid[NFS_NPROCS];
115 extern int nfs_ticks;
116
117 #ifdef DEBUG
118 /*
119 * Avoid spamming the console with debugging messages. We only print
120 * the nfs timer and reply error debugs every 10 seconds.
121 */
122 static const struct timeval nfs_err_interval = { 10, 0 };
123 static struct timeval nfs_reply_last_err_time __attribute__((__used__));
124 static struct timeval nfs_timer_last_err_time __attribute__((__used__));
125 #endif
126
127 /*
128 * Defines which timer to use for the procnum.
129 * 0 - default
130 * 1 - getattr
131 * 2 - lookup
132 * 3 - read
133 * 4 - write
134 */
135 static const int proct[NFS_NPROCS] = {
136 [NFSPROC_NULL] = 0,
137 [NFSPROC_GETATTR] = 1,
138 [NFSPROC_SETATTR] = 0,
139 [NFSPROC_LOOKUP] = 2,
140 [NFSPROC_ACCESS] = 1,
141 [NFSPROC_READLINK] = 3,
142 [NFSPROC_READ] = 3,
143 [NFSPROC_WRITE] = 4,
144 [NFSPROC_CREATE] = 0,
145 [NFSPROC_MKDIR] = 0,
146 [NFSPROC_SYMLINK] = 0,
147 [NFSPROC_MKNOD] = 0,
148 [NFSPROC_REMOVE] = 0,
149 [NFSPROC_RMDIR] = 0,
150 [NFSPROC_RENAME] = 0,
151 [NFSPROC_LINK] = 0,
152 [NFSPROC_READDIR] = 3,
153 [NFSPROC_READDIRPLUS] = 3,
154 [NFSPROC_FSSTAT] = 0,
155 [NFSPROC_FSINFO] = 0,
156 [NFSPROC_PATHCONF] = 0,
157 [NFSPROC_COMMIT] = 0,
158 [NFSPROC_NOOP] = 0,
159 };
160
161 /*
162 * There is a congestion window for outstanding rpcs maintained per mount
163 * point. The cwnd size is adjusted in roughly the way that:
164 * Van Jacobson, Congestion avoidance and Control, In "Proceedings of
165 * SIGCOMM '88". ACM, August 1988.
166 * describes for TCP. The cwnd size is chopped in half on a retransmit timeout
167 * and incremented by 1/cwnd when each rpc reply is received and a full cwnd
168 * of rpcs is in progress.
169 * (The sent count and cwnd are scaled for integer arith.)
170 * Variants of "slow start" were tried and were found to be too much of a
171 * performance hit (ave. rtt 3 times larger),
172 * I suspect due to the large rtt that nfs rpcs have.
173 */
174 #define NFS_CWNDSCALE 256
175 #define NFS_MAXCWND (NFS_CWNDSCALE * 32)
176 static const int nfs_backoff[8] = { 2, 4, 8, 16, 32, 64, 128, 256, };
177 int nfsrtton = 0;
178 struct nfsrtt nfsrtt;
179 struct nfsreqhead nfs_reqq;
180 static callout_t nfs_timer_ch;
181 static struct evcnt nfs_timer_ev;
182 static struct evcnt nfs_timer_start_ev;
183 static struct evcnt nfs_timer_stop_ev;
184 static kmutex_t nfs_timer_lock;
185 static bool (*nfs_timer_srvvec)(void);
186
187 #ifdef NFS
188 static int nfs_sndlock(struct nfsmount *, struct nfsreq *);
189 static void nfs_sndunlock(struct nfsmount *);
190 #endif
191 static int nfs_rcvlock(struct nfsmount *, struct nfsreq *);
192 static void nfs_rcvunlock(struct nfsmount *);
193
194 /*
195 * Initialize sockets and congestion for a new NFS connection.
196 * We do not free the sockaddr if error.
197 */
198 int
199 nfs_connect(struct nfsmount *nmp, struct nfsreq *rep, struct lwp *l)
200 {
201 struct socket *so;
202 int error, rcvreserve, sndreserve;
203 struct sockaddr *saddr;
204 struct sockaddr_in *sin;
205 struct sockaddr_in6 *sin6;
206 struct mbuf *m;
207 int val;
208
209 nmp->nm_so = NULL;
210 saddr = mtod(nmp->nm_nam, struct sockaddr *);
211 error = socreate(saddr->sa_family, &nmp->nm_so,
212 nmp->nm_sotype, nmp->nm_soproto, l, NULL);
213 if (error)
214 goto bad;
215 so = nmp->nm_so;
216 #ifdef MBUFTRACE
217 so->so_mowner = &nfs_mowner;
218 so->so_rcv.sb_mowner = &nfs_mowner;
219 so->so_snd.sb_mowner = &nfs_mowner;
220 #endif
221 nmp->nm_soflags = so->so_proto->pr_flags;
222
223 /*
224 * Some servers require that the client port be a reserved port number.
225 */
226 if (saddr->sa_family == AF_INET && (nmp->nm_flag & NFSMNT_RESVPORT)) {
227 val = IP_PORTRANGE_LOW;
228
229 if ((error = so_setsockopt(NULL, so, IPPROTO_IP, IP_PORTRANGE,
230 &val, sizeof(val))))
231 goto bad;
232 m = m_get(M_WAIT, MT_SONAME);
233 MCLAIM(m, so->so_mowner);
234 sin = mtod(m, struct sockaddr_in *);
235 sin->sin_len = m->m_len = sizeof (struct sockaddr_in);
236 sin->sin_family = AF_INET;
237 sin->sin_addr.s_addr = INADDR_ANY;
238 sin->sin_port = 0;
239 error = sobind(so, m, &lwp0);
240 m_freem(m);
241 if (error)
242 goto bad;
243 }
244 if (saddr->sa_family == AF_INET6 && (nmp->nm_flag & NFSMNT_RESVPORT)) {
245 val = IPV6_PORTRANGE_LOW;
246
247 if ((error = so_setsockopt(NULL, so, IPPROTO_IPV6,
248 IPV6_PORTRANGE, &val, sizeof(val))))
249 goto bad;
250 m = m_get(M_WAIT, MT_SONAME);
251 MCLAIM(m, so->so_mowner);
252 sin6 = mtod(m, struct sockaddr_in6 *);
253 memset(sin6, 0, sizeof(*sin6));
254 sin6->sin6_len = m->m_len = sizeof (struct sockaddr_in6);
255 sin6->sin6_family = AF_INET6;
256 error = sobind(so, m, &lwp0);
257 m_freem(m);
258 if (error)
259 goto bad;
260 }
261
262 /*
263 * Protocols that do not require connections may be optionally left
264 * unconnected for servers that reply from a port other than NFS_PORT.
265 */
266 solock(so);
267 if (nmp->nm_flag & NFSMNT_NOCONN) {
268 if (nmp->nm_soflags & PR_CONNREQUIRED) {
269 sounlock(so);
270 error = ENOTCONN;
271 goto bad;
272 }
273 } else {
274 error = soconnect(so, nmp->nm_nam, l);
275 if (error) {
276 sounlock(so);
277 goto bad;
278 }
279
280 /*
281 * Wait for the connection to complete. Cribbed from the
282 * connect system call but with the wait timing out so
283 * that interruptible mounts don't hang here for a long time.
284 */
285 while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) {
286 (void)sowait(so, false, 2 * hz);
287 if ((so->so_state & SS_ISCONNECTING) &&
288 so->so_error == 0 && rep &&
289 (error = nfs_sigintr(nmp, rep, rep->r_lwp)) != 0){
290 so->so_state &= ~SS_ISCONNECTING;
291 sounlock(so);
292 goto bad;
293 }
294 }
295 if (so->so_error) {
296 error = so->so_error;
297 so->so_error = 0;
298 sounlock(so);
299 goto bad;
300 }
301 }
302 if (nmp->nm_flag & (NFSMNT_SOFT | NFSMNT_INT)) {
303 so->so_rcv.sb_timeo = (5 * hz);
304 so->so_snd.sb_timeo = (5 * hz);
305 } else {
306 /*
307 * enable receive timeout to detect server crash and reconnect.
308 * otherwise, we can be stuck in soreceive forever.
309 */
310 so->so_rcv.sb_timeo = (5 * hz);
311 so->so_snd.sb_timeo = 0;
312 }
313 if (nmp->nm_sotype == SOCK_DGRAM) {
314 sndreserve = (nmp->nm_wsize + NFS_MAXPKTHDR) * 2;
315 rcvreserve = (max(nmp->nm_rsize, nmp->nm_readdirsize) +
316 NFS_MAXPKTHDR) * 2;
317 } else if (nmp->nm_sotype == SOCK_SEQPACKET) {
318 sndreserve = (nmp->nm_wsize + NFS_MAXPKTHDR) * 2;
319 rcvreserve = (max(nmp->nm_rsize, nmp->nm_readdirsize) +
320 NFS_MAXPKTHDR) * 2;
321 } else {
322 sounlock(so);
323 if (nmp->nm_sotype != SOCK_STREAM)
324 panic("nfscon sotype");
325 if (so->so_proto->pr_flags & PR_CONNREQUIRED) {
326 val = 1;
327 so_setsockopt(NULL, so, SOL_SOCKET, SO_KEEPALIVE, &val,
328 sizeof(val));
329 }
330 if (so->so_proto->pr_protocol == IPPROTO_TCP) {
331 val = 1;
332 so_setsockopt(NULL, so, IPPROTO_TCP, TCP_NODELAY, &val,
333 sizeof(val));
334 }
335 sndreserve = (nmp->nm_wsize + NFS_MAXPKTHDR +
336 sizeof (u_int32_t)) * 2;
337 rcvreserve = (nmp->nm_rsize + NFS_MAXPKTHDR +
338 sizeof (u_int32_t)) * 2;
339 solock(so);
340 }
341 error = soreserve(so, sndreserve, rcvreserve);
342 if (error) {
343 sounlock(so);
344 goto bad;
345 }
346 so->so_rcv.sb_flags |= SB_NOINTR;
347 so->so_snd.sb_flags |= SB_NOINTR;
348 sounlock(so);
349
350 /* Initialize other non-zero congestion variables */
351 nmp->nm_srtt[0] = nmp->nm_srtt[1] = nmp->nm_srtt[2] = nmp->nm_srtt[3] =
352 NFS_TIMEO << 3;
353 nmp->nm_sdrtt[0] = nmp->nm_sdrtt[1] = nmp->nm_sdrtt[2] =
354 nmp->nm_sdrtt[3] = 0;
355 nmp->nm_cwnd = NFS_MAXCWND / 2; /* Initial send window */
356 nmp->nm_sent = 0;
357 nmp->nm_timeouts = 0;
358 return (0);
359
360 bad:
361 nfs_disconnect(nmp);
362 return (error);
363 }
364
365 /*
366 * Reconnect routine:
367 * Called when a connection is broken on a reliable protocol.
368 * - clean up the old socket
369 * - nfs_connect() again
370 * - set R_MUSTRESEND for all outstanding requests on mount point
371 * If this fails the mount point is DEAD!
372 * nb: Must be called with the nfs_sndlock() set on the mount point.
373 */
374 int
375 nfs_reconnect(struct nfsreq *rep)
376 {
377 struct nfsreq *rp;
378 struct nfsmount *nmp = rep->r_nmp;
379 int error;
380
381 nfs_disconnect(nmp);
382 while ((error = nfs_connect(nmp, rep, &lwp0)) != 0) {
383 if (error == EINTR || error == ERESTART)
384 return (EINTR);
385 kpause("nfscn2", false, hz, NULL);
386 }
387
388 /*
389 * Loop through outstanding request list and fix up all requests
390 * on old socket.
391 */
392 TAILQ_FOREACH(rp, &nfs_reqq, r_chain) {
393 if (rp->r_nmp == nmp) {
394 if ((rp->r_flags & R_MUSTRESEND) == 0)
395 rp->r_flags |= R_MUSTRESEND | R_REXMITTED;
396 rp->r_rexmit = 0;
397 }
398 }
399 return (0);
400 }
401
402 /*
403 * NFS disconnect. Clean up and unlink.
404 */
405 void
406 nfs_disconnect(struct nfsmount *nmp)
407 {
408 struct socket *so;
409 int drain = 0;
410
411 if (nmp->nm_so) {
412 so = nmp->nm_so;
413 nmp->nm_so = NULL;
414 solock(so);
415 soshutdown(so, SHUT_RDWR);
416 sounlock(so);
417 drain = (nmp->nm_iflag & NFSMNT_DISMNT) != 0;
418 if (drain) {
419 /*
420 * soshutdown() above should wake up the current
421 * listener.
422 * Now wake up those waiting for the receive lock, and
423 * wait for them to go away unhappy, to prevent *nmp
424 * from evaporating while they're sleeping.
425 */
426 mutex_enter(&nmp->nm_lock);
427 while (nmp->nm_waiters > 0) {
428 cv_broadcast(&nmp->nm_rcvcv);
429 cv_broadcast(&nmp->nm_sndcv);
430 cv_wait(&nmp->nm_disconcv, &nmp->nm_lock);
431 }
432 mutex_exit(&nmp->nm_lock);
433 }
434 soclose(so);
435 }
436 #ifdef DIAGNOSTIC
437 if (drain && (nmp->nm_waiters > 0))
438 panic("nfs_disconnect: waiters left after drain?");
439 #endif
440 }
441
442 void
443 nfs_safedisconnect(struct nfsmount *nmp)
444 {
445 struct nfsreq dummyreq;
446
447 memset(&dummyreq, 0, sizeof(dummyreq));
448 dummyreq.r_nmp = nmp;
449 nfs_rcvlock(nmp, &dummyreq); /* XXX ignored error return */
450 nfs_disconnect(nmp);
451 nfs_rcvunlock(nmp);
452 }
453
454 /*
455 * This is the nfs send routine. For connection based socket types, it
456 * must be called with an nfs_sndlock() on the socket.
457 * "rep == NULL" indicates that it has been called from a server.
458 * For the client side:
459 * - return EINTR if the RPC is terminated, 0 otherwise
460 * - set R_MUSTRESEND if the send fails for any reason
461 * - do any cleanup required by recoverable socket errors (? ? ?)
462 * For the server side:
463 * - return EINTR or ERESTART if interrupted by a signal
464 * - return EPIPE if a connection is lost for connection based sockets (TCP...)
465 * - do any cleanup required by recoverable socket errors (? ? ?)
466 */
467 int
468 nfs_send(struct socket *so, struct mbuf *nam, struct mbuf *top, struct nfsreq *rep, struct lwp *l)
469 {
470 struct mbuf *sendnam;
471 int error, soflags, flags;
472
473 /* XXX nfs_doio()/nfs_request() calls with rep->r_lwp == NULL */
474 if (l == NULL && rep->r_lwp == NULL)
475 l = curlwp;
476
477 if (rep) {
478 if (rep->r_flags & R_SOFTTERM) {
479 m_freem(top);
480 return (EINTR);
481 }
482 if ((so = rep->r_nmp->nm_so) == NULL) {
483 rep->r_flags |= R_MUSTRESEND;
484 m_freem(top);
485 return (0);
486 }
487 rep->r_flags &= ~R_MUSTRESEND;
488 soflags = rep->r_nmp->nm_soflags;
489 } else
490 soflags = so->so_proto->pr_flags;
491 if ((soflags & PR_CONNREQUIRED) || (so->so_state & SS_ISCONNECTED))
492 sendnam = NULL;
493 else
494 sendnam = nam;
495 if (so->so_type == SOCK_SEQPACKET)
496 flags = MSG_EOR;
497 else
498 flags = 0;
499
500 error = (*so->so_send)(so, sendnam, NULL, top, NULL, flags, l);
501 if (error) {
502 if (rep) {
503 if (error == ENOBUFS && so->so_type == SOCK_DGRAM) {
504 /*
505 * We're too fast for the network/driver,
506 * and UDP isn't flowcontrolled.
507 * We need to resend. This is not fatal,
508 * just try again.
509 *
510 * Could be smarter here by doing some sort
511 * of a backoff, but this is rare.
512 */
513 rep->r_flags |= R_MUSTRESEND;
514 } else {
515 if (error != EPIPE)
516 log(LOG_INFO,
517 "nfs send error %d for %s\n",
518 error,
519 rep->r_nmp->nm_mountp->
520 mnt_stat.f_mntfromname);
521 /*
522 * Deal with errors for the client side.
523 */
524 if (rep->r_flags & R_SOFTTERM)
525 error = EINTR;
526 else if (error != EMSGSIZE)
527 rep->r_flags |= R_MUSTRESEND;
528 }
529 } else {
530 /*
531 * See above. This error can happen under normal
532 * circumstances and the log is too noisy.
533 * The error will still show up in nfsstat.
534 */
535 if (error != ENOBUFS || so->so_type != SOCK_DGRAM)
536 log(LOG_INFO, "nfsd send error %d\n", error);
537 }
538
539 /*
540 * Handle any recoverable (soft) socket errors here. (? ? ?)
541 */
542 if (error != EINTR && error != ERESTART &&
543 error != EWOULDBLOCK && error != EPIPE &&
544 error != EMSGSIZE)
545 error = 0;
546 }
547 return (error);
548 }
549
550 #ifdef NFS
551 /*
552 * Receive a Sun RPC Request/Reply. For SOCK_DGRAM, the work is all
553 * done by soreceive(), but for SOCK_STREAM we must deal with the Record
554 * Mark and consolidate the data into a new mbuf list.
555 * nb: Sometimes TCP passes the data up to soreceive() in long lists of
556 * small mbufs.
557 * For SOCK_STREAM we must be very careful to read an entire record once
558 * we have read any of it, even if the system call has been interrupted.
559 */
560 static int
561 nfs_receive(struct nfsreq *rep, struct mbuf **aname, struct mbuf **mp,
562 struct lwp *l)
563 {
564 struct socket *so;
565 struct uio auio;
566 struct iovec aio;
567 struct mbuf *m;
568 struct mbuf *control;
569 u_int32_t len;
570 struct mbuf **getnam;
571 int error, sotype, rcvflg;
572
573 /*
574 * Set up arguments for soreceive()
575 */
576 *mp = NULL;
577 *aname = NULL;
578 sotype = rep->r_nmp->nm_sotype;
579
580 /*
581 * For reliable protocols, lock against other senders/receivers
582 * in case a reconnect is necessary.
583 * For SOCK_STREAM, first get the Record Mark to find out how much
584 * more there is to get.
585 * We must lock the socket against other receivers
586 * until we have an entire rpc request/reply.
587 */
588 if (sotype != SOCK_DGRAM) {
589 error = nfs_sndlock(rep->r_nmp, rep);
590 if (error)
591 return (error);
592 tryagain:
593 /*
594 * Check for fatal errors and resending request.
595 */
596 /*
597 * Ugh: If a reconnect attempt just happened, nm_so
598 * would have changed. NULL indicates a failed
599 * attempt that has essentially shut down this
600 * mount point.
601 */
602 if (rep->r_mrep || (rep->r_flags & R_SOFTTERM)) {
603 nfs_sndunlock(rep->r_nmp);
604 return (EINTR);
605 }
606 so = rep->r_nmp->nm_so;
607 if (!so) {
608 error = nfs_reconnect(rep);
609 if (error) {
610 nfs_sndunlock(rep->r_nmp);
611 return (error);
612 }
613 goto tryagain;
614 }
615 while (rep->r_flags & R_MUSTRESEND) {
616 m = m_copym(rep->r_mreq, 0, M_COPYALL, M_WAIT);
617 nfsstats.rpcretries++;
618 rep->r_rtt = 0;
619 rep->r_flags &= ~R_TIMING;
620 error = nfs_send(so, rep->r_nmp->nm_nam, m, rep, l);
621 if (error) {
622 if (error == EINTR || error == ERESTART ||
623 (error = nfs_reconnect(rep)) != 0) {
624 nfs_sndunlock(rep->r_nmp);
625 return (error);
626 }
627 goto tryagain;
628 }
629 }
630 nfs_sndunlock(rep->r_nmp);
631 if (sotype == SOCK_STREAM) {
632 aio.iov_base = (void *) &len;
633 aio.iov_len = sizeof(u_int32_t);
634 auio.uio_iov = &aio;
635 auio.uio_iovcnt = 1;
636 auio.uio_rw = UIO_READ;
637 auio.uio_offset = 0;
638 auio.uio_resid = sizeof(u_int32_t);
639 UIO_SETUP_SYSSPACE(&auio);
640 do {
641 rcvflg = MSG_WAITALL;
642 error = (*so->so_receive)(so, NULL, &auio,
643 NULL, NULL, &rcvflg);
644 if (error == EWOULDBLOCK && rep) {
645 if (rep->r_flags & R_SOFTTERM)
646 return (EINTR);
647 /*
648 * if it seems that the server died after it
649 * received our request, set EPIPE so that
650 * we'll reconnect and retransmit requests.
651 */
652 if (rep->r_rexmit >= rep->r_nmp->nm_retry) {
653 nfsstats.rpctimeouts++;
654 error = EPIPE;
655 }
656 }
657 } while (error == EWOULDBLOCK);
658 if (!error && auio.uio_resid > 0) {
659 /*
660 * Don't log a 0 byte receive; it means
661 * that the socket has been closed, and
662 * can happen during normal operation
663 * (forcible unmount or Solaris server).
664 */
665 if (auio.uio_resid != sizeof (u_int32_t))
666 log(LOG_INFO,
667 "short receive (%lu/%lu) from nfs server %s\n",
668 (u_long)sizeof(u_int32_t) - auio.uio_resid,
669 (u_long)sizeof(u_int32_t),
670 rep->r_nmp->nm_mountp->mnt_stat.f_mntfromname);
671 error = EPIPE;
672 }
673 if (error)
674 goto errout;
675 len = ntohl(len) & ~0x80000000;
676 /*
677 * This is SERIOUS! We are out of sync with the sender
678 * and forcing a disconnect/reconnect is all I can do.
679 */
680 if (len > NFS_MAXPACKET) {
681 log(LOG_ERR, "%s (%d) from nfs server %s\n",
682 "impossible packet length",
683 len,
684 rep->r_nmp->nm_mountp->mnt_stat.f_mntfromname);
685 error = EFBIG;
686 goto errout;
687 }
688 auio.uio_resid = len;
689 do {
690 rcvflg = MSG_WAITALL;
691 error = (*so->so_receive)(so, NULL,
692 &auio, mp, NULL, &rcvflg);
693 } while (error == EWOULDBLOCK || error == EINTR ||
694 error == ERESTART);
695 if (!error && auio.uio_resid > 0) {
696 if (len != auio.uio_resid)
697 log(LOG_INFO,
698 "short receive (%lu/%d) from nfs server %s\n",
699 (u_long)len - auio.uio_resid, len,
700 rep->r_nmp->nm_mountp->mnt_stat.f_mntfromname);
701 error = EPIPE;
702 }
703 } else {
704 /*
705 * NB: Since uio_resid is big, MSG_WAITALL is ignored
706 * and soreceive() will return when it has either a
707 * control msg or a data msg.
708 * We have no use for control msg., but must grab them
709 * and then throw them away so we know what is going
710 * on.
711 */
712 auio.uio_resid = len = 100000000; /* Anything Big */
713 /* not need to setup uio_vmspace */
714 do {
715 rcvflg = 0;
716 error = (*so->so_receive)(so, NULL,
717 &auio, mp, &control, &rcvflg);
718 if (control)
719 m_freem(control);
720 if (error == EWOULDBLOCK && rep) {
721 if (rep->r_flags & R_SOFTTERM)
722 return (EINTR);
723 }
724 } while (error == EWOULDBLOCK ||
725 (!error && *mp == NULL && control));
726 if ((rcvflg & MSG_EOR) == 0)
727 printf("Egad!!\n");
728 if (!error && *mp == NULL)
729 error = EPIPE;
730 len -= auio.uio_resid;
731 }
732 errout:
733 if (error && error != EINTR && error != ERESTART) {
734 m_freem(*mp);
735 *mp = NULL;
736 if (error != EPIPE)
737 log(LOG_INFO,
738 "receive error %d from nfs server %s\n",
739 error,
740 rep->r_nmp->nm_mountp->mnt_stat.f_mntfromname);
741 error = nfs_sndlock(rep->r_nmp, rep);
742 if (!error)
743 error = nfs_reconnect(rep);
744 if (!error)
745 goto tryagain;
746 else
747 nfs_sndunlock(rep->r_nmp);
748 }
749 } else {
750 if ((so = rep->r_nmp->nm_so) == NULL)
751 return (EACCES);
752 if (so->so_state & SS_ISCONNECTED)
753 getnam = NULL;
754 else
755 getnam = aname;
756 auio.uio_resid = len = 1000000;
757 /* not need to setup uio_vmspace */
758 do {
759 rcvflg = 0;
760 error = (*so->so_receive)(so, getnam, &auio, mp,
761 NULL, &rcvflg);
762 if (error == EWOULDBLOCK &&
763 (rep->r_flags & R_SOFTTERM))
764 return (EINTR);
765 } while (error == EWOULDBLOCK);
766 len -= auio.uio_resid;
767 if (!error && *mp == NULL)
768 error = EPIPE;
769 }
770 if (error) {
771 m_freem(*mp);
772 *mp = NULL;
773 }
774 return (error);
775 }
776
777 /*
778 * Implement receipt of reply on a socket.
779 * We must search through the list of received datagrams matching them
780 * with outstanding requests using the xid, until ours is found.
781 */
782 /* ARGSUSED */
783 static int
784 nfs_reply(struct nfsreq *myrep, struct lwp *lwp)
785 {
786 struct nfsreq *rep;
787 struct nfsmount *nmp = myrep->r_nmp;
788 int32_t t1;
789 struct mbuf *mrep, *nam, *md;
790 u_int32_t rxid, *tl;
791 char *dpos, *cp2;
792 int error;
793
794 /*
795 * Loop around until we get our own reply
796 */
797 for (;;) {
798 /*
799 * Lock against other receivers so that I don't get stuck in
800 * sbwait() after someone else has received my reply for me.
801 * Also necessary for connection based protocols to avoid
802 * race conditions during a reconnect.
803 */
804 error = nfs_rcvlock(nmp, myrep);
805 if (error == EALREADY)
806 return (0);
807 if (error)
808 return (error);
809 /*
810 * Get the next Rpc reply off the socket
811 */
812
813 mutex_enter(&nmp->nm_lock);
814 nmp->nm_waiters++;
815 mutex_exit(&nmp->nm_lock);
816
817 error = nfs_receive(myrep, &nam, &mrep, lwp);
818
819 mutex_enter(&nmp->nm_lock);
820 nmp->nm_waiters--;
821 cv_signal(&nmp->nm_disconcv);
822 mutex_exit(&nmp->nm_lock);
823
824 if (error) {
825 nfs_rcvunlock(nmp);
826
827 if (nmp->nm_iflag & NFSMNT_DISMNT) {
828 /*
829 * Oops, we're going away now..
830 */
831 return error;
832 }
833 /*
834 * Ignore routing errors on connectionless protocols? ?
835 */
836 if (NFSIGNORE_SOERROR(nmp->nm_soflags, error)) {
837 nmp->nm_so->so_error = 0;
838 #ifdef DEBUG
839 if (ratecheck(&nfs_reply_last_err_time,
840 &nfs_err_interval))
841 printf("%s: ignoring error %d\n",
842 __func__, error);
843 #endif
844 continue;
845 }
846 return (error);
847 }
848 if (nam)
849 m_freem(nam);
850
851 /*
852 * Get the xid and check that it is an rpc reply
853 */
854 md = mrep;
855 dpos = mtod(md, void *);
856 nfsm_dissect(tl, u_int32_t *, 2*NFSX_UNSIGNED);
857 rxid = *tl++;
858 if (*tl != rpc_reply) {
859 nfsstats.rpcinvalid++;
860 m_freem(mrep);
861 nfsmout:
862 nfs_rcvunlock(nmp);
863 continue;
864 }
865
866 /*
867 * Loop through the request list to match up the reply
868 * Iff no match, just drop the datagram
869 */
870 TAILQ_FOREACH(rep, &nfs_reqq, r_chain) {
871 if (rep->r_mrep == NULL && rxid == rep->r_xid) {
872 /* Found it.. */
873 rep->r_mrep = mrep;
874 rep->r_md = md;
875 rep->r_dpos = dpos;
876 if (nfsrtton) {
877 struct rttl *rt;
878
879 rt = &nfsrtt.rttl[nfsrtt.pos];
880 rt->proc = rep->r_procnum;
881 rt->rto = NFS_RTO(nmp, proct[rep->r_procnum]);
882 rt->sent = nmp->nm_sent;
883 rt->cwnd = nmp->nm_cwnd;
884 rt->srtt = nmp->nm_srtt[proct[rep->r_procnum] - 1];
885 rt->sdrtt = nmp->nm_sdrtt[proct[rep->r_procnum] - 1];
886 rt->fsid = nmp->nm_mountp->mnt_stat.f_fsidx;
887 getmicrotime(&rt->tstamp);
888 if (rep->r_flags & R_TIMING)
889 rt->rtt = rep->r_rtt;
890 else
891 rt->rtt = 1000000;
892 nfsrtt.pos = (nfsrtt.pos + 1) % NFSRTTLOGSIZ;
893 }
894 /*
895 * Update congestion window.
896 * Do the additive increase of
897 * one rpc/rtt.
898 */
899 if (nmp->nm_cwnd <= nmp->nm_sent) {
900 nmp->nm_cwnd +=
901 (NFS_CWNDSCALE * NFS_CWNDSCALE +
902 (nmp->nm_cwnd >> 1)) / nmp->nm_cwnd;
903 if (nmp->nm_cwnd > NFS_MAXCWND)
904 nmp->nm_cwnd = NFS_MAXCWND;
905 }
906 rep->r_flags &= ~R_SENT;
907 nmp->nm_sent -= NFS_CWNDSCALE;
908 /*
909 * Update rtt using a gain of 0.125 on the mean
910 * and a gain of 0.25 on the deviation.
911 */
912 if (rep->r_flags & R_TIMING) {
913 /*
914 * Since the timer resolution of
915 * NFS_HZ is so course, it can often
916 * result in r_rtt == 0. Since
917 * r_rtt == N means that the actual
918 * rtt is between N+dt and N+2-dt ticks,
919 * add 1.
920 */
921 t1 = rep->r_rtt + 1;
922 t1 -= (NFS_SRTT(rep) >> 3);
923 NFS_SRTT(rep) += t1;
924 if (t1 < 0)
925 t1 = -t1;
926 t1 -= (NFS_SDRTT(rep) >> 2);
927 NFS_SDRTT(rep) += t1;
928 }
929 nmp->nm_timeouts = 0;
930 break;
931 }
932 }
933 nfs_rcvunlock(nmp);
934 /*
935 * If not matched to a request, drop it.
936 * If it's mine, get out.
937 */
938 if (rep == 0) {
939 nfsstats.rpcunexpected++;
940 m_freem(mrep);
941 } else if (rep == myrep) {
942 if (rep->r_mrep == NULL)
943 panic("nfsreply nil");
944 return (0);
945 }
946 }
947 }
948
949 /*
950 * nfs_request - goes something like this
951 * - fill in request struct
952 * - links it into list
953 * - calls nfs_send() for first transmit
954 * - calls nfs_receive() to get reply
955 * - break down rpc header and return with nfs reply pointed to
956 * by mrep or error
957 * nb: always frees up mreq mbuf list
958 */
959 int
960 nfs_request(struct nfsnode *np, struct mbuf *mrest, int procnum, struct lwp *lwp, kauth_cred_t cred, struct mbuf **mrp, struct mbuf **mdp, char **dposp, int *rexmitp)
961 {
962 struct mbuf *m, *mrep;
963 struct nfsreq *rep;
964 u_int32_t *tl;
965 int i;
966 struct nfsmount *nmp = VFSTONFS(np->n_vnode->v_mount);
967 struct mbuf *md, *mheadend;
968 char nickv[RPCX_NICKVERF];
969 time_t waituntil;
970 char *dpos, *cp2;
971 int t1, s, error = 0, mrest_len, auth_len, auth_type;
972 int trylater_delay = NFS_TRYLATERDEL, failed_auth = 0;
973 int verf_len, verf_type;
974 u_int32_t xid;
975 char *auth_str, *verf_str;
976 NFSKERBKEY_T key; /* save session key */
977 kauth_cred_t acred;
978 struct mbuf *mrest_backup = NULL;
979 kauth_cred_t origcred = NULL; /* XXX: gcc */
980 bool retry_cred = true;
981 bool use_opencred = (np->n_flag & NUSEOPENCRED) != 0;
982
983 if (rexmitp != NULL)
984 *rexmitp = 0;
985
986 acred = kauth_cred_alloc();
987
988 tryagain_cred:
989 KASSERT(cred != NULL);
990 rep = kmem_alloc(sizeof(*rep), KM_SLEEP);
991 rep->r_nmp = nmp;
992 KASSERT(lwp == NULL || lwp == curlwp);
993 rep->r_lwp = lwp;
994 rep->r_procnum = procnum;
995 i = 0;
996 m = mrest;
997 while (m) {
998 i += m->m_len;
999 m = m->m_next;
1000 }
1001 mrest_len = i;
1002
1003 /*
1004 * Get the RPC header with authorization.
1005 */
1006 kerbauth:
1007 verf_str = auth_str = NULL;
1008 if (nmp->nm_flag & NFSMNT_KERB) {
1009 verf_str = nickv;
1010 verf_len = sizeof (nickv);
1011 auth_type = RPCAUTH_KERB4;
1012 memset((void *)key, 0, sizeof (key));
1013 if (failed_auth || nfs_getnickauth(nmp, cred, &auth_str,
1014 &auth_len, verf_str, verf_len)) {
1015 error = nfs_getauth(nmp, rep, cred, &auth_str,
1016 &auth_len, verf_str, &verf_len, key);
1017 if (error) {
1018 kmem_free(rep, sizeof(*rep));
1019 m_freem(mrest);
1020 KASSERT(kauth_cred_getrefcnt(acred) == 1);
1021 kauth_cred_free(acred);
1022 return (error);
1023 }
1024 }
1025 retry_cred = false;
1026 } else {
1027 /* AUTH_UNIX */
1028 uid_t uid;
1029 gid_t gid;
1030
1031 /*
1032 * on the most unix filesystems, permission checks are
1033 * done when the file is open(2)'ed.
1034 * ie. once a file is successfully open'ed,
1035 * following i/o operations never fail with EACCES.
1036 * we try to follow the semantics as far as possible.
1037 *
1038 * note that we expect that the nfs server always grant
1039 * accesses by the file's owner.
1040 */
1041 origcred = cred;
1042 switch (procnum) {
1043 case NFSPROC_READ:
1044 case NFSPROC_WRITE:
1045 case NFSPROC_COMMIT:
1046 uid = np->n_vattr->va_uid;
1047 gid = np->n_vattr->va_gid;
1048 if (kauth_cred_geteuid(cred) == uid &&
1049 kauth_cred_getegid(cred) == gid) {
1050 retry_cred = false;
1051 break;
1052 }
1053 if (use_opencred)
1054 break;
1055 kauth_cred_setuid(acred, uid);
1056 kauth_cred_seteuid(acred, uid);
1057 kauth_cred_setsvuid(acred, uid);
1058 kauth_cred_setgid(acred, gid);
1059 kauth_cred_setegid(acred, gid);
1060 kauth_cred_setsvgid(acred, gid);
1061 cred = acred;
1062 break;
1063 default:
1064 retry_cred = false;
1065 break;
1066 }
1067 /*
1068 * backup mbuf chain if we can need it later to retry.
1069 *
1070 * XXX maybe we can keep a direct reference to
1071 * mrest without doing m_copym, but it's ...ugly.
1072 */
1073 if (retry_cred)
1074 mrest_backup = m_copym(mrest, 0, M_COPYALL, M_WAIT);
1075 auth_type = RPCAUTH_UNIX;
1076 /* XXX elad - ngroups */
1077 auth_len = (((kauth_cred_ngroups(cred) > nmp->nm_numgrps) ?
1078 nmp->nm_numgrps : kauth_cred_ngroups(cred)) << 2) +
1079 5 * NFSX_UNSIGNED;
1080 }
1081 m = nfsm_rpchead(cred, nmp->nm_flag, procnum, auth_type, auth_len,
1082 auth_str, verf_len, verf_str, mrest, mrest_len, &mheadend, &xid);
1083 if (auth_str)
1084 free(auth_str, M_TEMP);
1085
1086 /*
1087 * For stream protocols, insert a Sun RPC Record Mark.
1088 */
1089 if (nmp->nm_sotype == SOCK_STREAM) {
1090 M_PREPEND(m, NFSX_UNSIGNED, M_WAIT);
1091 *mtod(m, u_int32_t *) = htonl(0x80000000 |
1092 (m->m_pkthdr.len - NFSX_UNSIGNED));
1093 }
1094 rep->r_mreq = m;
1095 rep->r_xid = xid;
1096 tryagain:
1097 if (nmp->nm_flag & NFSMNT_SOFT)
1098 rep->r_retry = nmp->nm_retry;
1099 else
1100 rep->r_retry = NFS_MAXREXMIT + 1; /* past clip limit */
1101 rep->r_rtt = rep->r_rexmit = 0;
1102 if (proct[procnum] > 0)
1103 rep->r_flags = R_TIMING;
1104 else
1105 rep->r_flags = 0;
1106 rep->r_mrep = NULL;
1107
1108 /*
1109 * Do the client side RPC.
1110 */
1111 nfsstats.rpcrequests++;
1112 /*
1113 * Chain request into list of outstanding requests. Be sure
1114 * to put it LAST so timer finds oldest requests first.
1115 */
1116 s = splsoftnet();
1117 TAILQ_INSERT_TAIL(&nfs_reqq, rep, r_chain);
1118 nfs_timer_start();
1119
1120 /*
1121 * If backing off another request or avoiding congestion, don't
1122 * send this one now but let timer do it. If not timing a request,
1123 * do it now.
1124 */
1125 if (nmp->nm_so && (nmp->nm_sotype != SOCK_DGRAM ||
1126 (nmp->nm_flag & NFSMNT_DUMBTIMR) || nmp->nm_sent < nmp->nm_cwnd)) {
1127 splx(s);
1128 if (nmp->nm_soflags & PR_CONNREQUIRED)
1129 error = nfs_sndlock(nmp, rep);
1130 if (!error) {
1131 m = m_copym(rep->r_mreq, 0, M_COPYALL, M_WAIT);
1132 error = nfs_send(nmp->nm_so, nmp->nm_nam, m, rep, lwp);
1133 if (nmp->nm_soflags & PR_CONNREQUIRED)
1134 nfs_sndunlock(nmp);
1135 }
1136 if (!error && (rep->r_flags & R_MUSTRESEND) == 0) {
1137 nmp->nm_sent += NFS_CWNDSCALE;
1138 rep->r_flags |= R_SENT;
1139 }
1140 } else {
1141 splx(s);
1142 rep->r_rtt = -1;
1143 }
1144
1145 /*
1146 * Wait for the reply from our send or the timer's.
1147 */
1148 if (!error || error == EPIPE || error == EWOULDBLOCK)
1149 error = nfs_reply(rep, lwp);
1150
1151 /*
1152 * RPC done, unlink the request.
1153 */
1154 s = splsoftnet();
1155 TAILQ_REMOVE(&nfs_reqq, rep, r_chain);
1156 splx(s);
1157
1158 /*
1159 * Decrement the outstanding request count.
1160 */
1161 if (rep->r_flags & R_SENT) {
1162 rep->r_flags &= ~R_SENT; /* paranoia */
1163 nmp->nm_sent -= NFS_CWNDSCALE;
1164 }
1165
1166 if (rexmitp != NULL) {
1167 int rexmit;
1168
1169 if (nmp->nm_sotype != SOCK_DGRAM)
1170 rexmit = (rep->r_flags & R_REXMITTED) != 0;
1171 else
1172 rexmit = rep->r_rexmit;
1173 *rexmitp = rexmit;
1174 }
1175
1176 /*
1177 * If there was a successful reply and a tprintf msg.
1178 * tprintf a response.
1179 */
1180 if (!error && (rep->r_flags & R_TPRINTFMSG))
1181 nfs_msg(rep->r_lwp, nmp->nm_mountp->mnt_stat.f_mntfromname,
1182 "is alive again");
1183 mrep = rep->r_mrep;
1184 md = rep->r_md;
1185 dpos = rep->r_dpos;
1186 if (error)
1187 goto nfsmout;
1188
1189 /*
1190 * break down the rpc header and check if ok
1191 */
1192 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
1193 if (*tl++ == rpc_msgdenied) {
1194 if (*tl == rpc_mismatch)
1195 error = EOPNOTSUPP;
1196 else if ((nmp->nm_flag & NFSMNT_KERB) && *tl++ == rpc_autherr) {
1197 if (!failed_auth) {
1198 failed_auth++;
1199 mheadend->m_next = NULL;
1200 m_freem(mrep);
1201 m_freem(rep->r_mreq);
1202 goto kerbauth;
1203 } else
1204 error = EAUTH;
1205 } else
1206 error = EACCES;
1207 m_freem(mrep);
1208 goto nfsmout;
1209 }
1210
1211 /*
1212 * Grab any Kerberos verifier, otherwise just throw it away.
1213 */
1214 verf_type = fxdr_unsigned(int, *tl++);
1215 i = fxdr_unsigned(int32_t, *tl);
1216 if ((nmp->nm_flag & NFSMNT_KERB) && verf_type == RPCAUTH_KERB4) {
1217 error = nfs_savenickauth(nmp, cred, i, key, &md, &dpos, mrep);
1218 if (error)
1219 goto nfsmout;
1220 } else if (i > 0)
1221 nfsm_adv(nfsm_rndup(i));
1222 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
1223 /* 0 == ok */
1224 if (*tl == 0) {
1225 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
1226 if (*tl != 0) {
1227 error = fxdr_unsigned(int, *tl);
1228 switch (error) {
1229 case NFSERR_PERM:
1230 error = EPERM;
1231 break;
1232
1233 case NFSERR_NOENT:
1234 error = ENOENT;
1235 break;
1236
1237 case NFSERR_IO:
1238 error = EIO;
1239 break;
1240
1241 case NFSERR_NXIO:
1242 error = ENXIO;
1243 break;
1244
1245 case NFSERR_ACCES:
1246 error = EACCES;
1247 if (!retry_cred)
1248 break;
1249 m_freem(mrep);
1250 m_freem(rep->r_mreq);
1251 kmem_free(rep, sizeof(*rep));
1252 use_opencred = !use_opencred;
1253 if (mrest_backup == NULL) {
1254 /* m_copym failure */
1255 KASSERT(
1256 kauth_cred_getrefcnt(acred) == 1);
1257 kauth_cred_free(acred);
1258 return ENOMEM;
1259 }
1260 mrest = mrest_backup;
1261 mrest_backup = NULL;
1262 cred = origcred;
1263 error = 0;
1264 retry_cred = false;
1265 goto tryagain_cred;
1266
1267 case NFSERR_EXIST:
1268 error = EEXIST;
1269 break;
1270
1271 case NFSERR_XDEV:
1272 error = EXDEV;
1273 break;
1274
1275 case NFSERR_NODEV:
1276 error = ENODEV;
1277 break;
1278
1279 case NFSERR_NOTDIR:
1280 error = ENOTDIR;
1281 break;
1282
1283 case NFSERR_ISDIR:
1284 error = EISDIR;
1285 break;
1286
1287 case NFSERR_INVAL:
1288 error = EINVAL;
1289 break;
1290
1291 case NFSERR_FBIG:
1292 error = EFBIG;
1293 break;
1294
1295 case NFSERR_NOSPC:
1296 error = ENOSPC;
1297 break;
1298
1299 case NFSERR_ROFS:
1300 error = EROFS;
1301 break;
1302
1303 case NFSERR_MLINK:
1304 error = EMLINK;
1305 break;
1306
1307 case NFSERR_TIMEDOUT:
1308 error = ETIMEDOUT;
1309 break;
1310
1311 case NFSERR_NAMETOL:
1312 error = ENAMETOOLONG;
1313 break;
1314
1315 case NFSERR_NOTEMPTY:
1316 error = ENOTEMPTY;
1317 break;
1318
1319 case NFSERR_DQUOT:
1320 error = EDQUOT;
1321 break;
1322
1323 case NFSERR_STALE:
1324 /*
1325 * If the File Handle was stale, invalidate the
1326 * lookup cache, just in case.
1327 */
1328 error = ESTALE;
1329 cache_purge(NFSTOV(np));
1330 break;
1331
1332 case NFSERR_REMOTE:
1333 error = EREMOTE;
1334 break;
1335
1336 case NFSERR_WFLUSH:
1337 case NFSERR_BADHANDLE:
1338 case NFSERR_NOT_SYNC:
1339 case NFSERR_BAD_COOKIE:
1340 error = EINVAL;
1341 break;
1342
1343 case NFSERR_NOTSUPP:
1344 error = ENOTSUP;
1345 break;
1346
1347 case NFSERR_TOOSMALL:
1348 case NFSERR_SERVERFAULT:
1349 case NFSERR_BADTYPE:
1350 error = EINVAL;
1351 break;
1352
1353 case NFSERR_TRYLATER:
1354 if ((nmp->nm_flag & NFSMNT_NFSV3) == 0)
1355 break;
1356 m_freem(mrep);
1357 error = 0;
1358 waituntil = time_second + trylater_delay;
1359 while (time_second < waituntil) {
1360 kpause("nfstrylater", false, hz, NULL);
1361 }
1362 trylater_delay *= NFS_TRYLATERDELMUL;
1363 if (trylater_delay > NFS_TRYLATERDELMAX)
1364 trylater_delay = NFS_TRYLATERDELMAX;
1365 /*
1366 * RFC1813:
1367 * The client should wait and then try
1368 * the request with a new RPC transaction ID.
1369 */
1370 nfs_renewxid(rep);
1371 goto tryagain;
1372
1373 default:
1374 #ifdef DIAGNOSTIC
1375 printf("Invalid rpc error code %d\n", error);
1376 #endif
1377 error = EINVAL;
1378 break;
1379 }
1380
1381 if (nmp->nm_flag & NFSMNT_NFSV3) {
1382 *mrp = mrep;
1383 *mdp = md;
1384 *dposp = dpos;
1385 error |= NFSERR_RETERR;
1386 } else
1387 m_freem(mrep);
1388 goto nfsmout;
1389 }
1390
1391 /*
1392 * note which credential worked to minimize number of retries.
1393 */
1394 if (use_opencred)
1395 np->n_flag |= NUSEOPENCRED;
1396 else
1397 np->n_flag &= ~NUSEOPENCRED;
1398
1399 *mrp = mrep;
1400 *mdp = md;
1401 *dposp = dpos;
1402
1403 KASSERT(error == 0);
1404 goto nfsmout;
1405 }
1406 m_freem(mrep);
1407 error = EPROTONOSUPPORT;
1408 nfsmout:
1409 KASSERT(kauth_cred_getrefcnt(acred) == 1);
1410 kauth_cred_free(acred);
1411 m_freem(rep->r_mreq);
1412 kmem_free(rep, sizeof(*rep));
1413 m_freem(mrest_backup);
1414 return (error);
1415 }
1416 #endif /* NFS */
1417
1418 /*
1419 * Generate the rpc reply header
1420 * siz arg. is used to decide if adding a cluster is worthwhile
1421 */
1422 int
1423 nfs_rephead(int siz, struct nfsrv_descript *nd, struct nfssvc_sock *slp, int err, int cache, u_quad_t *frev, struct mbuf **mrq, struct mbuf **mbp, char **bposp)
1424 {
1425 u_int32_t *tl;
1426 struct mbuf *mreq;
1427 char *bpos;
1428 struct mbuf *mb;
1429
1430 mreq = m_gethdr(M_WAIT, MT_DATA);
1431 MCLAIM(mreq, &nfs_mowner);
1432 mb = mreq;
1433 /*
1434 * If this is a big reply, use a cluster else
1435 * try and leave leading space for the lower level headers.
1436 */
1437 siz += RPC_REPLYSIZ;
1438 if (siz >= max_datalen) {
1439 m_clget(mreq, M_WAIT);
1440 } else
1441 mreq->m_data += max_hdr;
1442 tl = mtod(mreq, u_int32_t *);
1443 mreq->m_len = 6 * NFSX_UNSIGNED;
1444 bpos = ((char *)tl) + mreq->m_len;
1445 *tl++ = txdr_unsigned(nd->nd_retxid);
1446 *tl++ = rpc_reply;
1447 if (err == ERPCMISMATCH || (err & NFSERR_AUTHERR)) {
1448 *tl++ = rpc_msgdenied;
1449 if (err & NFSERR_AUTHERR) {
1450 *tl++ = rpc_autherr;
1451 *tl = txdr_unsigned(err & ~NFSERR_AUTHERR);
1452 mreq->m_len -= NFSX_UNSIGNED;
1453 bpos -= NFSX_UNSIGNED;
1454 } else {
1455 *tl++ = rpc_mismatch;
1456 *tl++ = txdr_unsigned(RPC_VER2);
1457 *tl = txdr_unsigned(RPC_VER2);
1458 }
1459 } else {
1460 *tl++ = rpc_msgaccepted;
1461
1462 /*
1463 * For Kerberos authentication, we must send the nickname
1464 * verifier back, otherwise just RPCAUTH_NULL.
1465 */
1466 if (nd->nd_flag & ND_KERBFULL) {
1467 struct nfsuid *nuidp;
1468 struct timeval ktvin, ktvout;
1469
1470 memset(&ktvout, 0, sizeof ktvout); /* XXX gcc */
1471
1472 LIST_FOREACH(nuidp,
1473 NUIDHASH(slp, kauth_cred_geteuid(nd->nd_cr)),
1474 nu_hash) {
1475 if (kauth_cred_geteuid(nuidp->nu_cr) ==
1476 kauth_cred_geteuid(nd->nd_cr) &&
1477 (!nd->nd_nam2 || netaddr_match(
1478 NU_NETFAM(nuidp), &nuidp->nu_haddr,
1479 nd->nd_nam2)))
1480 break;
1481 }
1482 if (nuidp) {
1483 ktvin.tv_sec =
1484 txdr_unsigned(nuidp->nu_timestamp.tv_sec
1485 - 1);
1486 ktvin.tv_usec =
1487 txdr_unsigned(nuidp->nu_timestamp.tv_usec);
1488
1489 /*
1490 * Encrypt the timestamp in ecb mode using the
1491 * session key.
1492 */
1493 #ifdef NFSKERB
1494 XXX
1495 #endif
1496
1497 *tl++ = rpc_auth_kerb;
1498 *tl++ = txdr_unsigned(3 * NFSX_UNSIGNED);
1499 *tl = ktvout.tv_sec;
1500 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
1501 *tl++ = ktvout.tv_usec;
1502 *tl++ = txdr_unsigned(
1503 kauth_cred_geteuid(nuidp->nu_cr));
1504 } else {
1505 *tl++ = 0;
1506 *tl++ = 0;
1507 }
1508 } else {
1509 *tl++ = 0;
1510 *tl++ = 0;
1511 }
1512 switch (err) {
1513 case EPROGUNAVAIL:
1514 *tl = txdr_unsigned(RPC_PROGUNAVAIL);
1515 break;
1516 case EPROGMISMATCH:
1517 *tl = txdr_unsigned(RPC_PROGMISMATCH);
1518 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
1519 *tl++ = txdr_unsigned(2);
1520 *tl = txdr_unsigned(3);
1521 break;
1522 case EPROCUNAVAIL:
1523 *tl = txdr_unsigned(RPC_PROCUNAVAIL);
1524 break;
1525 case EBADRPC:
1526 *tl = txdr_unsigned(RPC_GARBAGE);
1527 break;
1528 default:
1529 *tl = 0;
1530 if (err != NFSERR_RETVOID) {
1531 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
1532 if (err)
1533 *tl = txdr_unsigned(nfsrv_errmap(nd, err));
1534 else
1535 *tl = 0;
1536 }
1537 break;
1538 };
1539 }
1540
1541 if (mrq != NULL)
1542 *mrq = mreq;
1543 *mbp = mb;
1544 *bposp = bpos;
1545 if (err != 0 && err != NFSERR_RETVOID)
1546 nfsstats.srvrpc_errs++;
1547 return (0);
1548 }
1549
1550 static void
1551 nfs_timer_schedule(void)
1552 {
1553
1554 callout_schedule(&nfs_timer_ch, nfs_ticks);
1555 }
1556
1557 void
1558 nfs_timer_start(void)
1559 {
1560
1561 if (callout_pending(&nfs_timer_ch))
1562 return;
1563
1564 nfs_timer_start_ev.ev_count++;
1565 nfs_timer_schedule();
1566 }
1567
1568 void
1569 nfs_timer_init(void)
1570 {
1571
1572 mutex_init(&nfs_timer_lock, MUTEX_DEFAULT, IPL_NONE);
1573 callout_init(&nfs_timer_ch, 0);
1574 callout_setfunc(&nfs_timer_ch, nfs_timer, NULL);
1575 evcnt_attach_dynamic(&nfs_timer_ev, EVCNT_TYPE_MISC, NULL,
1576 "nfs", "timer");
1577 evcnt_attach_dynamic(&nfs_timer_start_ev, EVCNT_TYPE_MISC, NULL,
1578 "nfs", "timer start");
1579 evcnt_attach_dynamic(&nfs_timer_stop_ev, EVCNT_TYPE_MISC, NULL,
1580 "nfs", "timer stop");
1581 }
1582
1583 void
1584 nfs_timer_fini(void)
1585 {
1586
1587 callout_halt(&nfs_timer_ch, NULL);
1588 callout_destroy(&nfs_timer_ch);
1589 mutex_destroy(&nfs_timer_lock);
1590 evcnt_detach(&nfs_timer_ev);
1591 evcnt_detach(&nfs_timer_start_ev);
1592 evcnt_detach(&nfs_timer_stop_ev);
1593 }
1594
1595 void
1596 nfs_timer_srvinit(bool (*func)(void))
1597 {
1598
1599 nfs_timer_srvvec = func;
1600 }
1601
1602 void
1603 nfs_timer_srvfini(void)
1604 {
1605
1606 mutex_enter(&nfs_timer_lock);
1607 nfs_timer_srvvec = NULL;
1608 mutex_exit(&nfs_timer_lock);
1609 }
1610
1611
1612 /*
1613 * Nfs timer routine
1614 * Scan the nfsreq list and retranmit any requests that have timed out
1615 * To avoid retransmission attempts on STREAM sockets (in the future) make
1616 * sure to set the r_retry field to 0 (implies nm_retry == 0).
1617 */
1618 void
1619 nfs_timer(void *arg)
1620 {
1621 struct nfsreq *rep;
1622 struct mbuf *m;
1623 struct socket *so;
1624 struct nfsmount *nmp;
1625 int timeo;
1626 int error;
1627 bool more = false;
1628
1629 nfs_timer_ev.ev_count++;
1630
1631 mutex_enter(softnet_lock); /* XXX PR 40491 */
1632 TAILQ_FOREACH(rep, &nfs_reqq, r_chain) {
1633 more = true;
1634 nmp = rep->r_nmp;
1635 if (rep->r_mrep || (rep->r_flags & R_SOFTTERM))
1636 continue;
1637 if (nfs_sigintr(nmp, rep, rep->r_lwp)) {
1638 rep->r_flags |= R_SOFTTERM;
1639 continue;
1640 }
1641 if (rep->r_rtt >= 0) {
1642 rep->r_rtt++;
1643 if (nmp->nm_flag & NFSMNT_DUMBTIMR)
1644 timeo = nmp->nm_timeo;
1645 else
1646 timeo = NFS_RTO(nmp, proct[rep->r_procnum]);
1647 if (nmp->nm_timeouts > 0)
1648 timeo *= nfs_backoff[nmp->nm_timeouts - 1];
1649 if (timeo > NFS_MAXTIMEO)
1650 timeo = NFS_MAXTIMEO;
1651 if (rep->r_rtt <= timeo)
1652 continue;
1653 if (nmp->nm_timeouts <
1654 (sizeof(nfs_backoff) / sizeof(nfs_backoff[0])))
1655 nmp->nm_timeouts++;
1656 }
1657 /*
1658 * Check for server not responding
1659 */
1660 if ((rep->r_flags & R_TPRINTFMSG) == 0 &&
1661 rep->r_rexmit > nmp->nm_deadthresh) {
1662 nfs_msg(rep->r_lwp,
1663 nmp->nm_mountp->mnt_stat.f_mntfromname,
1664 "not responding");
1665 rep->r_flags |= R_TPRINTFMSG;
1666 }
1667 if (rep->r_rexmit >= rep->r_retry) { /* too many */
1668 nfsstats.rpctimeouts++;
1669 rep->r_flags |= R_SOFTTERM;
1670 continue;
1671 }
1672 if (nmp->nm_sotype != SOCK_DGRAM) {
1673 if (++rep->r_rexmit > NFS_MAXREXMIT)
1674 rep->r_rexmit = NFS_MAXREXMIT;
1675 continue;
1676 }
1677 if ((so = nmp->nm_so) == NULL)
1678 continue;
1679
1680 /*
1681 * If there is enough space and the window allows..
1682 * Resend it
1683 * Set r_rtt to -1 in case we fail to send it now.
1684 */
1685 /* solock(so); XXX PR 40491 */
1686 rep->r_rtt = -1;
1687 if (sbspace(&so->so_snd) >= rep->r_mreq->m_pkthdr.len &&
1688 ((nmp->nm_flag & NFSMNT_DUMBTIMR) ||
1689 (rep->r_flags & R_SENT) ||
1690 nmp->nm_sent < nmp->nm_cwnd) &&
1691 (m = m_copym(rep->r_mreq, 0, M_COPYALL, M_DONTWAIT))){
1692 if (so->so_state & SS_ISCONNECTED)
1693 error = (*so->so_proto->pr_usrreq)(so, PRU_SEND, m,
1694 NULL, NULL, NULL);
1695 else
1696 error = (*so->so_proto->pr_usrreq)(so, PRU_SEND, m,
1697 nmp->nm_nam, NULL, NULL);
1698 if (error) {
1699 if (NFSIGNORE_SOERROR(nmp->nm_soflags, error)) {
1700 #ifdef DEBUG
1701 if (ratecheck(&nfs_timer_last_err_time,
1702 &nfs_err_interval))
1703 printf("%s: ignoring error "
1704 "%d\n", __func__, error);
1705 #endif
1706 so->so_error = 0;
1707 }
1708 } else {
1709 /*
1710 * Iff first send, start timing
1711 * else turn timing off, backoff timer
1712 * and divide congestion window by 2.
1713 */
1714 if (rep->r_flags & R_SENT) {
1715 rep->r_flags &= ~R_TIMING;
1716 if (++rep->r_rexmit > NFS_MAXREXMIT)
1717 rep->r_rexmit = NFS_MAXREXMIT;
1718 nmp->nm_cwnd >>= 1;
1719 if (nmp->nm_cwnd < NFS_CWNDSCALE)
1720 nmp->nm_cwnd = NFS_CWNDSCALE;
1721 nfsstats.rpcretries++;
1722 } else {
1723 rep->r_flags |= R_SENT;
1724 nmp->nm_sent += NFS_CWNDSCALE;
1725 }
1726 rep->r_rtt = 0;
1727 }
1728 }
1729 /* sounlock(so); XXX PR 40491 */
1730 }
1731 mutex_exit(softnet_lock); /* XXX PR 40491 */
1732
1733 mutex_enter(&nfs_timer_lock);
1734 if (nfs_timer_srvvec != NULL) {
1735 more |= (*nfs_timer_srvvec)();
1736 }
1737 mutex_exit(&nfs_timer_lock);
1738
1739 if (more) {
1740 nfs_timer_schedule();
1741 } else {
1742 nfs_timer_stop_ev.ev_count++;
1743 }
1744 }
1745
1746 /*
1747 * Test for a termination condition pending on the process.
1748 * This is used for NFSMNT_INT mounts.
1749 */
1750 int
1751 nfs_sigintr(struct nfsmount *nmp, struct nfsreq *rep, struct lwp *l)
1752 {
1753 sigset_t ss;
1754
1755 if (rep && (rep->r_flags & R_SOFTTERM))
1756 return (EINTR);
1757 if (!(nmp->nm_flag & NFSMNT_INT))
1758 return (0);
1759 if (l) {
1760 sigpending1(l, &ss);
1761 #if 0
1762 sigminusset(&l->l_proc->p_sigctx.ps_sigignore, &ss);
1763 #endif
1764 if (sigismember(&ss, SIGINT) || sigismember(&ss, SIGTERM) ||
1765 sigismember(&ss, SIGKILL) || sigismember(&ss, SIGHUP) ||
1766 sigismember(&ss, SIGQUIT))
1767 return (EINTR);
1768 }
1769 return (0);
1770 }
1771
1772 #ifdef NFS
1773 /*
1774 * Lock a socket against others.
1775 * Necessary for STREAM sockets to ensure you get an entire rpc request/reply
1776 * and also to avoid race conditions between the processes with nfs requests
1777 * in progress when a reconnect is necessary.
1778 */
1779 static int
1780 nfs_sndlock(struct nfsmount *nmp, struct nfsreq *rep)
1781 {
1782 struct lwp *l;
1783 int timeo = 0;
1784 bool catch = false;
1785 int error = 0;
1786
1787 if (rep) {
1788 l = rep->r_lwp;
1789 if (rep->r_nmp->nm_flag & NFSMNT_INT)
1790 catch = true;
1791 } else
1792 l = NULL;
1793 mutex_enter(&nmp->nm_lock);
1794 while ((nmp->nm_iflag & NFSMNT_SNDLOCK) != 0) {
1795 if (rep && nfs_sigintr(rep->r_nmp, rep, l)) {
1796 error = EINTR;
1797 goto quit;
1798 }
1799 if (catch) {
1800 cv_timedwait_sig(&nmp->nm_sndcv, &nmp->nm_lock, timeo);
1801 } else {
1802 cv_timedwait(&nmp->nm_sndcv, &nmp->nm_lock, timeo);
1803 }
1804 if (catch) {
1805 catch = false;
1806 timeo = 2 * hz;
1807 }
1808 }
1809 nmp->nm_iflag |= NFSMNT_SNDLOCK;
1810 quit:
1811 mutex_exit(&nmp->nm_lock);
1812 return error;
1813 }
1814
1815 /*
1816 * Unlock the stream socket for others.
1817 */
1818 static void
1819 nfs_sndunlock(struct nfsmount *nmp)
1820 {
1821
1822 mutex_enter(&nmp->nm_lock);
1823 if ((nmp->nm_iflag & NFSMNT_SNDLOCK) == 0)
1824 panic("nfs sndunlock");
1825 nmp->nm_iflag &= ~NFSMNT_SNDLOCK;
1826 cv_signal(&nmp->nm_sndcv);
1827 mutex_exit(&nmp->nm_lock);
1828 }
1829 #endif /* NFS */
1830
1831 static int
1832 nfs_rcvlock(struct nfsmount *nmp, struct nfsreq *rep)
1833 {
1834 int *flagp = &nmp->nm_iflag;
1835 int slptimeo = 0;
1836 bool catch;
1837 int error = 0;
1838
1839 KASSERT(nmp == rep->r_nmp);
1840
1841 catch = (nmp->nm_flag & NFSMNT_INT) != 0;
1842 mutex_enter(&nmp->nm_lock);
1843 while (/* CONSTCOND */ true) {
1844 if (*flagp & NFSMNT_DISMNT) {
1845 cv_signal(&nmp->nm_disconcv);
1846 error = EIO;
1847 break;
1848 }
1849 /* If our reply was received while we were sleeping,
1850 * then just return without taking the lock to avoid a
1851 * situation where a single iod could 'capture' the
1852 * receive lock.
1853 */
1854 if (rep->r_mrep != NULL) {
1855 error = EALREADY;
1856 break;
1857 }
1858 if (nfs_sigintr(rep->r_nmp, rep, rep->r_lwp)) {
1859 error = EINTR;
1860 break;
1861 }
1862 if ((*flagp & NFSMNT_RCVLOCK) == 0) {
1863 *flagp |= NFSMNT_RCVLOCK;
1864 break;
1865 }
1866 if (catch) {
1867 cv_timedwait_sig(&nmp->nm_rcvcv, &nmp->nm_lock,
1868 slptimeo);
1869 } else {
1870 cv_timedwait(&nmp->nm_rcvcv, &nmp->nm_lock,
1871 slptimeo);
1872 }
1873 if (catch) {
1874 catch = false;
1875 slptimeo = 2 * hz;
1876 }
1877 }
1878 mutex_exit(&nmp->nm_lock);
1879 return error;
1880 }
1881
1882 /*
1883 * Unlock the stream socket for others.
1884 */
1885 static void
1886 nfs_rcvunlock(struct nfsmount *nmp)
1887 {
1888
1889 mutex_enter(&nmp->nm_lock);
1890 if ((nmp->nm_iflag & NFSMNT_RCVLOCK) == 0)
1891 panic("nfs rcvunlock");
1892 nmp->nm_iflag &= ~NFSMNT_RCVLOCK;
1893 cv_broadcast(&nmp->nm_rcvcv);
1894 mutex_exit(&nmp->nm_lock);
1895 }
1896
1897 /*
1898 * Parse an RPC request
1899 * - verify it
1900 * - allocate and fill in the cred.
1901 */
1902 int
1903 nfs_getreq(struct nfsrv_descript *nd, struct nfsd *nfsd, int has_header)
1904 {
1905 int len, i;
1906 u_int32_t *tl;
1907 int32_t t1;
1908 struct uio uio;
1909 struct iovec iov;
1910 char *dpos, *cp2, *cp;
1911 u_int32_t nfsvers, auth_type;
1912 uid_t nickuid;
1913 int error = 0, ticklen;
1914 struct mbuf *mrep, *md;
1915 struct nfsuid *nuidp;
1916 struct timeval tvin, tvout;
1917
1918 memset(&tvout, 0, sizeof tvout); /* XXX gcc */
1919
1920 KASSERT(nd->nd_cr == NULL);
1921 mrep = nd->nd_mrep;
1922 md = nd->nd_md;
1923 dpos = nd->nd_dpos;
1924 if (has_header) {
1925 nfsm_dissect(tl, u_int32_t *, 10 * NFSX_UNSIGNED);
1926 nd->nd_retxid = fxdr_unsigned(u_int32_t, *tl++);
1927 if (*tl++ != rpc_call) {
1928 m_freem(mrep);
1929 return (EBADRPC);
1930 }
1931 } else
1932 nfsm_dissect(tl, u_int32_t *, 8 * NFSX_UNSIGNED);
1933 nd->nd_repstat = 0;
1934 nd->nd_flag = 0;
1935 if (*tl++ != rpc_vers) {
1936 nd->nd_repstat = ERPCMISMATCH;
1937 nd->nd_procnum = NFSPROC_NOOP;
1938 return (0);
1939 }
1940 if (*tl != nfs_prog) {
1941 nd->nd_repstat = EPROGUNAVAIL;
1942 nd->nd_procnum = NFSPROC_NOOP;
1943 return (0);
1944 }
1945 tl++;
1946 nfsvers = fxdr_unsigned(u_int32_t, *tl++);
1947 if (nfsvers < NFS_VER2 || nfsvers > NFS_VER3) {
1948 nd->nd_repstat = EPROGMISMATCH;
1949 nd->nd_procnum = NFSPROC_NOOP;
1950 return (0);
1951 }
1952 if (nfsvers == NFS_VER3)
1953 nd->nd_flag = ND_NFSV3;
1954 nd->nd_procnum = fxdr_unsigned(u_int32_t, *tl++);
1955 if (nd->nd_procnum == NFSPROC_NULL)
1956 return (0);
1957 if (nd->nd_procnum > NFSPROC_COMMIT ||
1958 (!nd->nd_flag && nd->nd_procnum > NFSV2PROC_STATFS)) {
1959 nd->nd_repstat = EPROCUNAVAIL;
1960 nd->nd_procnum = NFSPROC_NOOP;
1961 return (0);
1962 }
1963 if ((nd->nd_flag & ND_NFSV3) == 0)
1964 nd->nd_procnum = nfsv3_procid[nd->nd_procnum];
1965 auth_type = *tl++;
1966 len = fxdr_unsigned(int, *tl++);
1967 if (len < 0 || len > RPCAUTH_MAXSIZ) {
1968 m_freem(mrep);
1969 return (EBADRPC);
1970 }
1971
1972 nd->nd_flag &= ~ND_KERBAUTH;
1973 /*
1974 * Handle auth_unix or auth_kerb.
1975 */
1976 if (auth_type == rpc_auth_unix) {
1977 uid_t uid;
1978 gid_t gid;
1979
1980 nd->nd_cr = kauth_cred_alloc();
1981 len = fxdr_unsigned(int, *++tl);
1982 if (len < 0 || len > NFS_MAXNAMLEN) {
1983 m_freem(mrep);
1984 error = EBADRPC;
1985 goto errout;
1986 }
1987 nfsm_adv(nfsm_rndup(len));
1988 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
1989
1990 uid = fxdr_unsigned(uid_t, *tl++);
1991 gid = fxdr_unsigned(gid_t, *tl++);
1992 kauth_cred_setuid(nd->nd_cr, uid);
1993 kauth_cred_seteuid(nd->nd_cr, uid);
1994 kauth_cred_setsvuid(nd->nd_cr, uid);
1995 kauth_cred_setgid(nd->nd_cr, gid);
1996 kauth_cred_setegid(nd->nd_cr, gid);
1997 kauth_cred_setsvgid(nd->nd_cr, gid);
1998
1999 len = fxdr_unsigned(int, *tl);
2000 if (len < 0 || len > RPCAUTH_UNIXGIDS) {
2001 m_freem(mrep);
2002 error = EBADRPC;
2003 goto errout;
2004 }
2005 nfsm_dissect(tl, u_int32_t *, (len + 2) * NFSX_UNSIGNED);
2006
2007 if (len > 0) {
2008 size_t grbuf_size = min(len, NGROUPS) * sizeof(gid_t);
2009 gid_t *grbuf = kmem_alloc(grbuf_size, KM_SLEEP);
2010
2011 for (i = 0; i < len; i++) {
2012 if (i < NGROUPS) /* XXX elad */
2013 grbuf[i] = fxdr_unsigned(gid_t, *tl++);
2014 else
2015 tl++;
2016 }
2017 kauth_cred_setgroups(nd->nd_cr, grbuf,
2018 min(len, NGROUPS), -1, UIO_SYSSPACE);
2019 kmem_free(grbuf, grbuf_size);
2020 }
2021
2022 len = fxdr_unsigned(int, *++tl);
2023 if (len < 0 || len > RPCAUTH_MAXSIZ) {
2024 m_freem(mrep);
2025 error = EBADRPC;
2026 goto errout;
2027 }
2028 if (len > 0)
2029 nfsm_adv(nfsm_rndup(len));
2030 } else if (auth_type == rpc_auth_kerb) {
2031 switch (fxdr_unsigned(int, *tl++)) {
2032 case RPCAKN_FULLNAME:
2033 ticklen = fxdr_unsigned(int, *tl);
2034 *((u_int32_t *)nfsd->nfsd_authstr) = *tl;
2035 uio.uio_resid = nfsm_rndup(ticklen) + NFSX_UNSIGNED;
2036 nfsd->nfsd_authlen = uio.uio_resid + NFSX_UNSIGNED;
2037 if (uio.uio_resid > (len - 2 * NFSX_UNSIGNED)) {
2038 m_freem(mrep);
2039 error = EBADRPC;
2040 goto errout;
2041 }
2042 uio.uio_offset = 0;
2043 uio.uio_iov = &iov;
2044 uio.uio_iovcnt = 1;
2045 UIO_SETUP_SYSSPACE(&uio);
2046 iov.iov_base = (void *)&nfsd->nfsd_authstr[4];
2047 iov.iov_len = RPCAUTH_MAXSIZ - 4;
2048 nfsm_mtouio(&uio, uio.uio_resid);
2049 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
2050 if (*tl++ != rpc_auth_kerb ||
2051 fxdr_unsigned(int, *tl) != 4 * NFSX_UNSIGNED) {
2052 printf("Bad kerb verifier\n");
2053 nd->nd_repstat = (NFSERR_AUTHERR|AUTH_BADVERF);
2054 nd->nd_procnum = NFSPROC_NOOP;
2055 return (0);
2056 }
2057 nfsm_dissect(cp, void *, 4 * NFSX_UNSIGNED);
2058 tl = (u_int32_t *)cp;
2059 if (fxdr_unsigned(int, *tl) != RPCAKN_FULLNAME) {
2060 printf("Not fullname kerb verifier\n");
2061 nd->nd_repstat = (NFSERR_AUTHERR|AUTH_BADVERF);
2062 nd->nd_procnum = NFSPROC_NOOP;
2063 return (0);
2064 }
2065 cp += NFSX_UNSIGNED;
2066 memcpy(nfsd->nfsd_verfstr, cp, 3 * NFSX_UNSIGNED);
2067 nfsd->nfsd_verflen = 3 * NFSX_UNSIGNED;
2068 nd->nd_flag |= ND_KERBFULL;
2069 nfsd->nfsd_flag |= NFSD_NEEDAUTH;
2070 break;
2071 case RPCAKN_NICKNAME:
2072 if (len != 2 * NFSX_UNSIGNED) {
2073 printf("Kerb nickname short\n");
2074 nd->nd_repstat = (NFSERR_AUTHERR|AUTH_BADCRED);
2075 nd->nd_procnum = NFSPROC_NOOP;
2076 return (0);
2077 }
2078 nickuid = fxdr_unsigned(uid_t, *tl);
2079 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
2080 if (*tl++ != rpc_auth_kerb ||
2081 fxdr_unsigned(int, *tl) != 3 * NFSX_UNSIGNED) {
2082 printf("Kerb nick verifier bad\n");
2083 nd->nd_repstat = (NFSERR_AUTHERR|AUTH_BADVERF);
2084 nd->nd_procnum = NFSPROC_NOOP;
2085 return (0);
2086 }
2087 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2088 tvin.tv_sec = *tl++;
2089 tvin.tv_usec = *tl;
2090
2091 LIST_FOREACH(nuidp, NUIDHASH(nfsd->nfsd_slp, nickuid),
2092 nu_hash) {
2093 if (kauth_cred_geteuid(nuidp->nu_cr) == nickuid &&
2094 (!nd->nd_nam2 ||
2095 netaddr_match(NU_NETFAM(nuidp),
2096 &nuidp->nu_haddr, nd->nd_nam2)))
2097 break;
2098 }
2099 if (!nuidp) {
2100 nd->nd_repstat =
2101 (NFSERR_AUTHERR|AUTH_REJECTCRED);
2102 nd->nd_procnum = NFSPROC_NOOP;
2103 return (0);
2104 }
2105
2106 /*
2107 * Now, decrypt the timestamp using the session key
2108 * and validate it.
2109 */
2110 #ifdef NFSKERB
2111 XXX
2112 #endif
2113
2114 tvout.tv_sec = fxdr_unsigned(long, tvout.tv_sec);
2115 tvout.tv_usec = fxdr_unsigned(long, tvout.tv_usec);
2116 if (nuidp->nu_expire < time_second ||
2117 nuidp->nu_timestamp.tv_sec > tvout.tv_sec ||
2118 (nuidp->nu_timestamp.tv_sec == tvout.tv_sec &&
2119 nuidp->nu_timestamp.tv_usec > tvout.tv_usec)) {
2120 nuidp->nu_expire = 0;
2121 nd->nd_repstat =
2122 (NFSERR_AUTHERR|AUTH_REJECTVERF);
2123 nd->nd_procnum = NFSPROC_NOOP;
2124 return (0);
2125 }
2126 kauth_cred_hold(nuidp->nu_cr);
2127 nd->nd_cr = nuidp->nu_cr;
2128 nd->nd_flag |= ND_KERBNICK;
2129 }
2130 } else {
2131 nd->nd_repstat = (NFSERR_AUTHERR | AUTH_REJECTCRED);
2132 nd->nd_procnum = NFSPROC_NOOP;
2133 return (0);
2134 }
2135
2136 nd->nd_md = md;
2137 nd->nd_dpos = dpos;
2138 KASSERT((nd->nd_cr == NULL && (nfsd->nfsd_flag & NFSD_NEEDAUTH) != 0)
2139 || (nd->nd_cr != NULL && (nfsd->nfsd_flag & NFSD_NEEDAUTH) == 0));
2140 return (0);
2141 nfsmout:
2142 errout:
2143 KASSERT(error != 0);
2144 if (nd->nd_cr != NULL) {
2145 kauth_cred_free(nd->nd_cr);
2146 nd->nd_cr = NULL;
2147 }
2148 return (error);
2149 }
2150
2151 int
2152 nfs_msg(struct lwp *l, const char *server, const char *msg)
2153 {
2154 tpr_t tpr;
2155
2156 if (l)
2157 tpr = tprintf_open(l->l_proc);
2158 else
2159 tpr = NULL;
2160 tprintf(tpr, "nfs server %s: %s\n", server, msg);
2161 tprintf_close(tpr);
2162 return (0);
2163 }
2164
2165 static struct pool nfs_srvdesc_pool;
2166
2167 void
2168 nfsdreq_init(void)
2169 {
2170
2171 pool_init(&nfs_srvdesc_pool, sizeof(struct nfsrv_descript),
2172 0, 0, 0, "nfsrvdescpl", &pool_allocator_nointr, IPL_NONE);
2173 }
2174
2175 void
2176 nfsdreq_fini(void)
2177 {
2178
2179 pool_destroy(&nfs_srvdesc_pool);
2180 }
2181
2182 struct nfsrv_descript *
2183 nfsdreq_alloc(void)
2184 {
2185 struct nfsrv_descript *nd;
2186
2187 nd = pool_get(&nfs_srvdesc_pool, PR_WAITOK);
2188 nd->nd_cr = NULL;
2189 return nd;
2190 }
2191
2192 void
2193 nfsdreq_free(struct nfsrv_descript *nd)
2194 {
2195 kauth_cred_t cr;
2196
2197 cr = nd->nd_cr;
2198 if (cr != NULL) {
2199 kauth_cred_free(cr);
2200 }
2201 pool_put(&nfs_srvdesc_pool, nd);
2202 }
NetBSD on the FriendlyARM MINI2440