1 /* $NetBSD: nfs_commonkrpc.c,v 1.1.1.1 2013/09/30 07:19:36 dholland Exp $ */
2 /*-
3 * Copyright (c) 1989, 1991, 1993, 1995
4 * The Regents of the University of California. All rights reserved.
5 *
6 * This code is derived from software contributed to Berkeley by
7 * Rick Macklem at The University of Guelph.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 */
34
35 #include <sys/cdefs.h>
36 /* __FBSDID("FreeBSD: head/sys/fs/nfs/nfs_commonkrpc.c 253049 2013-07-09 01:05:28Z rmacklem "); */
37 __RCSID("$NetBSD: nfs_commonkrpc.c,v 1.1.1.1 2013/09/30 07:19:36 dholland Exp $");
38
39 /*
40 * Socket operations for use by nfs
41 */
42
43 #include "opt_kdtrace.h"
44 #include "opt_kgssapi.h"
45 #include "opt_nfs.h"
46
47 #include <sys/param.h>
48 #include <sys/systm.h>
49 #include <sys/kernel.h>
50 #include <sys/limits.h>
51 #include <sys/lock.h>
52 #include <sys/malloc.h>
53 #include <sys/mbuf.h>
54 #include <sys/mount.h>
55 #include <sys/mutex.h>
56 #include <sys/proc.h>
57 #include <sys/signalvar.h>
58 #include <sys/syscallsubr.h>
59 #include <sys/sysctl.h>
60 #include <sys/syslog.h>
61 #include <sys/vnode.h>
62
63 #include <rpc/rpc.h>
64
65 #include <kgssapi/krb5/kcrypto.h>
66
67 #include <fs/nfs/nfsport.h>
68
69 #ifdef KDTRACE_HOOKS
70 #include <sys/dtrace_bsd.h>
71
72 dtrace_nfsclient_nfs23_start_probe_func_t
73 dtrace_nfscl_nfs234_start_probe;
74
75 dtrace_nfsclient_nfs23_done_probe_func_t
76 dtrace_nfscl_nfs234_done_probe;
77
78 /*
79 * Registered probes by RPC type.
80 */
81 uint32_t nfscl_nfs2_start_probes[NFSV41_NPROCS + 1];
82 uint32_t nfscl_nfs2_done_probes[NFSV41_NPROCS + 1];
83
84 uint32_t nfscl_nfs3_start_probes[NFSV41_NPROCS + 1];
85 uint32_t nfscl_nfs3_done_probes[NFSV41_NPROCS + 1];
86
87 uint32_t nfscl_nfs4_start_probes[NFSV41_NPROCS + 1];
88 uint32_t nfscl_nfs4_done_probes[NFSV41_NPROCS + 1];
89 #endif
90
91 NFSSTATESPINLOCK;
92 NFSREQSPINLOCK;
93 NFSDLOCKMUTEX;
94 extern struct nfsstats newnfsstats;
95 extern struct nfsreqhead nfsd_reqq;
96 extern int nfscl_ticks;
97 extern void (*ncl_call_invalcaches)(struct vnode *);
98 extern int nfs_numnfscbd;
99 extern int nfscl_debuglevel;
100
101 SVCPOOL *nfscbd_pool;
102 static int nfsrv_gsscallbackson = 0;
103 static int nfs_bufpackets = 4;
104 static int nfs_reconnects;
105 static int nfs3_jukebox_delay = 10;
106 static int nfs_skip_wcc_data_onerr = 1;
107
108 SYSCTL_DECL(_vfs_nfs);
109
110 SYSCTL_INT(_vfs_nfs, OID_AUTO, bufpackets, CTLFLAG_RW, &nfs_bufpackets, 0,
111 "Buffer reservation size 2 < x < 64");
112 SYSCTL_INT(_vfs_nfs, OID_AUTO, reconnects, CTLFLAG_RD, &nfs_reconnects, 0,
113 "Number of times the nfs client has had to reconnect");
114 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs3_jukebox_delay, CTLFLAG_RW, &nfs3_jukebox_delay, 0,
115 "Number of seconds to delay a retry after receiving EJUKEBOX");
116 SYSCTL_INT(_vfs_nfs, OID_AUTO, skip_wcc_data_onerr, CTLFLAG_RW, &nfs_skip_wcc_data_onerr, 0,
117 "Disable weak cache consistency checking when server returns an error");
118
119 static void nfs_down(struct nfsmount *, struct thread *, const char *,
120 int, int);
121 static void nfs_up(struct nfsmount *, struct thread *, const char *,
122 int, int);
123 static int nfs_msg(struct thread *, const char *, const char *, int);
124
125 struct nfs_cached_auth {
126 int ca_refs; /* refcount, including 1 from the cache */
127 uid_t ca_uid; /* uid that corresponds to this auth */
128 AUTH *ca_auth; /* RPC auth handle */
129 };
130
131 static int nfsv2_procid[NFS_V3NPROCS] = {
132 NFSV2PROC_NULL,
133 NFSV2PROC_GETATTR,
134 NFSV2PROC_SETATTR,
135 NFSV2PROC_LOOKUP,
136 NFSV2PROC_NOOP,
137 NFSV2PROC_READLINK,
138 NFSV2PROC_READ,
139 NFSV2PROC_WRITE,
140 NFSV2PROC_CREATE,
141 NFSV2PROC_MKDIR,
142 NFSV2PROC_SYMLINK,
143 NFSV2PROC_CREATE,
144 NFSV2PROC_REMOVE,
145 NFSV2PROC_RMDIR,
146 NFSV2PROC_RENAME,
147 NFSV2PROC_LINK,
148 NFSV2PROC_READDIR,
149 NFSV2PROC_NOOP,
150 NFSV2PROC_STATFS,
151 NFSV2PROC_NOOP,
152 NFSV2PROC_NOOP,
153 NFSV2PROC_NOOP,
154 };
155
156 /*
157 * Initialize sockets and congestion for a new NFS connection.
158 * We do not free the sockaddr if error.
159 */
160 int
newnfs_connect(struct nfsmount * nmp,struct nfssockreq * nrp,struct ucred * cred,NFSPROC_T * p,int callback_retry_mult)161 newnfs_connect(struct nfsmount *nmp, struct nfssockreq *nrp,
162 struct ucred *cred, NFSPROC_T *p, int callback_retry_mult)
163 {
164 int rcvreserve, sndreserve;
165 int pktscale;
166 struct sockaddr *saddr;
167 struct ucred *origcred;
168 CLIENT *client;
169 struct netconfig *nconf;
170 struct socket *so;
171 int one = 1, retries, error = 0;
172 struct thread *td = curthread;
173 SVCXPRT *xprt;
174 struct timeval timo;
175
176 /*
177 * We need to establish the socket using the credentials of
178 * the mountpoint. Some parts of this process (such as
179 * sobind() and soconnect()) will use the curent thread's
180 * credential instead of the socket credential. To work
181 * around this, temporarily change the current thread's
182 * credential to that of the mountpoint.
183 *
184 * XXX: It would be better to explicitly pass the correct
185 * credential to sobind() and soconnect().
186 */
187 origcred = td->td_ucred;
188
189 /*
190 * Use the credential in nr_cred, if not NULL.
191 */
192 if (nrp->nr_cred != NULL)
193 td->td_ucred = nrp->nr_cred;
194 else
195 td->td_ucred = cred;
196 saddr = nrp->nr_nam;
197
198 if (saddr->sa_family == AF_INET)
199 if (nrp->nr_sotype == SOCK_DGRAM)
200 nconf = getnetconfigent("udp");
201 else
202 nconf = getnetconfigent("tcp");
203 else
204 if (nrp->nr_sotype == SOCK_DGRAM)
205 nconf = getnetconfigent("udp6");
206 else
207 nconf = getnetconfigent("tcp6");
208
209 pktscale = nfs_bufpackets;
210 if (pktscale < 2)
211 pktscale = 2;
212 if (pktscale > 64)
213 pktscale = 64;
214 /*
215 * soreserve() can fail if sb_max is too small, so shrink pktscale
216 * and try again if there is an error.
217 * Print a log message suggesting increasing sb_max.
218 * Creating a socket and doing this is necessary since, if the
219 * reservation sizes are too large and will make soreserve() fail,
220 * the connection will work until a large send is attempted and
221 * then it will loop in the krpc code.
222 */
223 so = NULL;
224 saddr = NFSSOCKADDR(nrp->nr_nam, struct sockaddr *);
225 error = socreate(saddr->sa_family, &so, nrp->nr_sotype,
226 nrp->nr_soproto, td->td_ucred, td);
227 if (error) {
228 td->td_ucred = origcred;
229 goto out;
230 }
231 do {
232 if (error != 0 && pktscale > 2)
233 pktscale--;
234 if (nrp->nr_sotype == SOCK_DGRAM) {
235 if (nmp != NULL) {
236 sndreserve = (NFS_MAXDGRAMDATA + NFS_MAXPKTHDR) *
237 pktscale;
238 rcvreserve = (NFS_MAXDGRAMDATA + NFS_MAXPKTHDR) *
239 pktscale;
240 } else {
241 sndreserve = rcvreserve = 1024 * pktscale;
242 }
243 } else {
244 if (nrp->nr_sotype != SOCK_STREAM)
245 panic("nfscon sotype");
246 if (nmp != NULL) {
247 sndreserve = (NFS_MAXBSIZE + NFS_MAXPKTHDR +
248 sizeof (u_int32_t)) * pktscale;
249 rcvreserve = (NFS_MAXBSIZE + NFS_MAXPKTHDR +
250 sizeof (u_int32_t)) * pktscale;
251 } else {
252 sndreserve = rcvreserve = 1024 * pktscale;
253 }
254 }
255 error = soreserve(so, sndreserve, rcvreserve);
256 } while (error != 0 && pktscale > 2);
257 soclose(so);
258 if (error) {
259 td->td_ucred = origcred;
260 goto out;
261 }
262
263 client = clnt_reconnect_create(nconf, saddr, nrp->nr_prog,
264 nrp->nr_vers, sndreserve, rcvreserve);
265 CLNT_CONTROL(client, CLSET_WAITCHAN, "newnfsreq");
266 if (nmp != NULL) {
267 if ((nmp->nm_flag & NFSMNT_INT))
268 CLNT_CONTROL(client, CLSET_INTERRUPTIBLE, &one);
269 if ((nmp->nm_flag & NFSMNT_RESVPORT))
270 CLNT_CONTROL(client, CLSET_PRIVPORT, &one);
271 if (NFSHASSOFT(nmp)) {
272 if (nmp->nm_sotype == SOCK_DGRAM)
273 /*
274 * For UDP, the large timeout for a reconnect
275 * will be set to "nm_retry * nm_timeo / 2", so
276 * we only want to do 2 reconnect timeout
277 * retries.
278 */
279 retries = 2;
280 else
281 retries = nmp->nm_retry;
282 } else
283 retries = INT_MAX;
284 if (NFSHASNFSV4N(nmp)) {
285 /*
286 * Make sure the nfscbd_pool doesn't get destroyed
287 * while doing this.
288 */
289 NFSD_LOCK();
290 if (nfs_numnfscbd > 0) {
291 nfs_numnfscbd++;
292 NFSD_UNLOCK();
293 xprt = svc_vc_create_backchannel(nfscbd_pool);
294 CLNT_CONTROL(client, CLSET_BACKCHANNEL, xprt);
295 NFSD_LOCK();
296 nfs_numnfscbd--;
297 if (nfs_numnfscbd == 0)
298 wakeup(&nfs_numnfscbd);
299 }
300 NFSD_UNLOCK();
301 }
302 } else {
303 /*
304 * Three cases:
305 * - Null RPC callback to client
306 * - Non-Null RPC callback to client, wait a little longer
307 * - upcalls to nfsuserd and gssd (clp == NULL)
308 */
309 if (callback_retry_mult == 0) {
310 retries = NFSV4_UPCALLRETRY;
311 CLNT_CONTROL(client, CLSET_PRIVPORT, &one);
312 } else {
313 retries = NFSV4_CALLBACKRETRY * callback_retry_mult;
314 }
315 }
316 CLNT_CONTROL(client, CLSET_RETRIES, &retries);
317
318 if (nmp != NULL) {
319 /*
320 * For UDP, there are 2 timeouts:
321 * - CLSET_RETRY_TIMEOUT sets the initial timeout for the timer
322 * that does a retransmit of an RPC request using the same
323 * socket and xid. This is what you normally want to do,
324 * since NFS servers depend on "same xid" for their
325 * Duplicate Request Cache.
326 * - timeout specified in CLNT_CALL_MBUF(), which specifies when
327 * retransmits on the same socket should fail and a fresh
328 * socket created. Each of these timeouts counts as one
329 * CLSET_RETRIES as set above.
330 * Set the initial retransmit timeout for UDP. This timeout
331 * doesn't exist for TCP and the following call just fails,
332 * which is ok.
333 */
334 timo.tv_sec = nmp->nm_timeo / NFS_HZ;
335 timo.tv_usec = (nmp->nm_timeo % NFS_HZ) * 1000000 / NFS_HZ;
336 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, &timo);
337 }
338
339 mtx_lock(&nrp->nr_mtx);
340 if (nrp->nr_client != NULL) {
341 /*
342 * Someone else already connected.
343 */
344 CLNT_RELEASE(client);
345 } else {
346 nrp->nr_client = client;
347 }
348
349 /*
350 * Protocols that do not require connections may be optionally left
351 * unconnected for servers that reply from a port other than NFS_PORT.
352 */
353 if (nmp == NULL || (nmp->nm_flag & NFSMNT_NOCONN) == 0) {
354 mtx_unlock(&nrp->nr_mtx);
355 CLNT_CONTROL(client, CLSET_CONNECT, &one);
356 } else {
357 mtx_unlock(&nrp->nr_mtx);
358 }
359
360 /* Restore current thread's credentials. */
361 td->td_ucred = origcred;
362
363 out:
364 NFSEXITCODE(error);
365 return (error);
366 }
367
368 /*
369 * NFS disconnect. Clean up and unlink.
370 */
371 void
newnfs_disconnect(struct nfssockreq * nrp)372 newnfs_disconnect(struct nfssockreq *nrp)
373 {
374 CLIENT *client;
375
376 mtx_lock(&nrp->nr_mtx);
377 if (nrp->nr_client != NULL) {
378 client = nrp->nr_client;
379 nrp->nr_client = NULL;
380 mtx_unlock(&nrp->nr_mtx);
381 rpc_gss_secpurge_call(client);
382 CLNT_CLOSE(client);
383 CLNT_RELEASE(client);
384 } else {
385 mtx_unlock(&nrp->nr_mtx);
386 }
387 }
388
389 static AUTH *
nfs_getauth(struct nfssockreq * nrp,int secflavour,char * clnt_principal,char * srv_principal,gss_OID mech_oid,struct ucred * cred)390 nfs_getauth(struct nfssockreq *nrp, int secflavour, char *clnt_principal,
391 char *srv_principal, gss_OID mech_oid, struct ucred *cred)
392 {
393 rpc_gss_service_t svc;
394 AUTH *auth;
395
396 switch (secflavour) {
397 case RPCSEC_GSS_KRB5:
398 case RPCSEC_GSS_KRB5I:
399 case RPCSEC_GSS_KRB5P:
400 if (!mech_oid) {
401 if (!rpc_gss_mech_to_oid_call("kerberosv5", &mech_oid))
402 return (NULL);
403 }
404 if (secflavour == RPCSEC_GSS_KRB5)
405 svc = rpc_gss_svc_none;
406 else if (secflavour == RPCSEC_GSS_KRB5I)
407 svc = rpc_gss_svc_integrity;
408 else
409 svc = rpc_gss_svc_privacy;
410
411 if (clnt_principal == NULL)
412 auth = rpc_gss_secfind_call(nrp->nr_client, cred,
413 srv_principal, mech_oid, svc);
414 else {
415 auth = rpc_gss_seccreate_call(nrp->nr_client, cred,
416 clnt_principal, srv_principal, "kerberosv5",
417 svc, NULL, NULL, NULL);
418 return (auth);
419 }
420 if (auth != NULL)
421 return (auth);
422 /* fallthrough */
423 case AUTH_SYS:
424 default:
425 return (authunix_create(cred));
426
427 }
428 }
429
430 /*
431 * Callback from the RPC code to generate up/down notifications.
432 */
433
434 struct nfs_feedback_arg {
435 struct nfsmount *nf_mount;
436 int nf_lastmsg; /* last tprintf */
437 int nf_tprintfmsg;
438 struct thread *nf_td;
439 };
440
441 static void
nfs_feedback(int type,int proc,void * arg)442 nfs_feedback(int type, int proc, void *arg)
443 {
444 struct nfs_feedback_arg *nf = (struct nfs_feedback_arg *) arg;
445 struct nfsmount *nmp = nf->nf_mount;
446 time_t now;
447
448 switch (type) {
449 case FEEDBACK_REXMIT2:
450 case FEEDBACK_RECONNECT:
451 now = NFSD_MONOSEC;
452 if (nf->nf_lastmsg + nmp->nm_tprintf_delay < now) {
453 nfs_down(nmp, nf->nf_td,
454 "not responding", 0, NFSSTA_TIMEO);
455 nf->nf_tprintfmsg = TRUE;
456 nf->nf_lastmsg = now;
457 }
458 break;
459
460 case FEEDBACK_OK:
461 nfs_up(nf->nf_mount, nf->nf_td,
462 "is alive again", NFSSTA_TIMEO, nf->nf_tprintfmsg);
463 break;
464 }
465 }
466
467 /*
468 * newnfs_request - goes something like this
469 * - does the rpc by calling the krpc layer
470 * - break down rpc header and return with nfs reply
471 * nb: always frees up nd_mreq mbuf list
472 */
473 int
newnfs_request(struct nfsrv_descript * nd,struct nfsmount * nmp,struct nfsclient * clp,struct nfssockreq * nrp,vnode_t vp,struct thread * td,struct ucred * cred,u_int32_t prog,u_int32_t vers,u_char * retsum,int toplevel,u_int64_t * xidp,struct nfsclsession * sep)474 newnfs_request(struct nfsrv_descript *nd, struct nfsmount *nmp,
475 struct nfsclient *clp, struct nfssockreq *nrp, vnode_t vp,
476 struct thread *td, struct ucred *cred, u_int32_t prog, u_int32_t vers,
477 u_char *retsum, int toplevel, u_int64_t *xidp, struct nfsclsession *sep)
478 {
479 u_int32_t retseq, retval, *tl;
480 time_t waituntil;
481 int i = 0, j = 0, opcnt, set_sigset = 0, slot;
482 int trycnt, error = 0, usegssname = 0, secflavour = AUTH_SYS;
483 int freeslot, timeo;
484 u_int16_t procnum;
485 u_int trylater_delay = 1;
486 struct nfs_feedback_arg nf;
487 struct timeval timo;
488 AUTH *auth;
489 struct rpc_callextra ext;
490 enum clnt_stat stat;
491 struct nfsreq *rep = NULL;
492 char *srv_principal = NULL, *clnt_principal = NULL;
493 sigset_t oldset;
494 struct ucred *authcred;
495
496 if (xidp != NULL)
497 *xidp = 0;
498 /* Reject requests while attempting a forced unmount. */
499 if (nmp != NULL && (nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF)) {
500 m_freem(nd->nd_mreq);
501 return (ESTALE);
502 }
503
504 /*
505 * Set authcred, which is used to acquire RPC credentials to
506 * the cred argument, by default. The crhold() should not be
507 * necessary, but will ensure that some future code change
508 * doesn't result in the credential being free'd prematurely.
509 */
510 authcred = crhold(cred);
511
512 /* For client side interruptible mounts, mask off the signals. */
513 if (nmp != NULL && td != NULL && NFSHASINT(nmp)) {
514 newnfs_set_sigmask(td, &oldset);
515 set_sigset = 1;
516 }
517
518 /*
519 * XXX if not already connected call nfs_connect now. Longer
520 * term, change nfs_mount to call nfs_connect unconditionally
521 * and let clnt_reconnect_create handle reconnects.
522 */
523 if (nrp->nr_client == NULL)
524 newnfs_connect(nmp, nrp, cred, td, 0);
525
526 /*
527 * For a client side mount, nmp is != NULL and clp == NULL. For
528 * server calls (callbacks or upcalls), nmp == NULL.
529 */
530 if (clp != NULL) {
531 NFSLOCKSTATE();
532 if ((clp->lc_flags & LCL_GSS) && nfsrv_gsscallbackson) {
533 secflavour = RPCSEC_GSS_KRB5;
534 if (nd->nd_procnum != NFSPROC_NULL) {
535 if (clp->lc_flags & LCL_GSSINTEGRITY)
536 secflavour = RPCSEC_GSS_KRB5I;
537 else if (clp->lc_flags & LCL_GSSPRIVACY)
538 secflavour = RPCSEC_GSS_KRB5P;
539 }
540 }
541 NFSUNLOCKSTATE();
542 } else if (nmp != NULL && NFSHASKERB(nmp) &&
543 nd->nd_procnum != NFSPROC_NULL) {
544 if (NFSHASALLGSSNAME(nmp) && nmp->nm_krbnamelen > 0)
545 nd->nd_flag |= ND_USEGSSNAME;
546 if ((nd->nd_flag & ND_USEGSSNAME) != 0) {
547 /*
548 * If there is a client side host based credential,
549 * use that, otherwise use the system uid, if set.
550 * The system uid is in the nmp->nm_sockreq.nr_cred
551 * credentials.
552 */
553 if (nmp->nm_krbnamelen > 0) {
554 usegssname = 1;
555 clnt_principal = nmp->nm_krbname;
556 } else if (nmp->nm_uid != (uid_t)-1) {
557 KASSERT(nmp->nm_sockreq.nr_cred != NULL,
558 ("newnfs_request: NULL nr_cred"));
559 crfree(authcred);
560 authcred = crhold(nmp->nm_sockreq.nr_cred);
561 }
562 } else if (nmp->nm_krbnamelen == 0 &&
563 nmp->nm_uid != (uid_t)-1 && cred->cr_uid == (uid_t)0) {
564 /*
565 * If there is no host based principal name and
566 * the system uid is set and this is root, use the
567 * system uid, since root won't have user
568 * credentials in a credentials cache file.
569 * The system uid is in the nmp->nm_sockreq.nr_cred
570 * credentials.
571 */
572 KASSERT(nmp->nm_sockreq.nr_cred != NULL,
573 ("newnfs_request: NULL nr_cred"));
574 crfree(authcred);
575 authcred = crhold(nmp->nm_sockreq.nr_cred);
576 }
577 if (NFSHASINTEGRITY(nmp))
578 secflavour = RPCSEC_GSS_KRB5I;
579 else if (NFSHASPRIVACY(nmp))
580 secflavour = RPCSEC_GSS_KRB5P;
581 else
582 secflavour = RPCSEC_GSS_KRB5;
583 srv_principal = NFSMNT_SRVKRBNAME(nmp);
584 } else if (nmp != NULL && !NFSHASKERB(nmp) &&
585 nd->nd_procnum != NFSPROC_NULL &&
586 (nd->nd_flag & ND_USEGSSNAME) != 0) {
587 /*
588 * Use the uid that did the mount when the RPC is doing
589 * NFSv4 system operations, as indicated by the
590 * ND_USEGSSNAME flag, for the AUTH_SYS case.
591 * The credentials in nm_sockreq.nr_cred were used for the
592 * mount.
593 */
594 KASSERT(nmp->nm_sockreq.nr_cred != NULL,
595 ("newnfs_request: NULL nr_cred"));
596 crfree(authcred);
597 authcred = crhold(nmp->nm_sockreq.nr_cred);
598 }
599
600 if (nmp != NULL) {
601 bzero(&nf, sizeof(struct nfs_feedback_arg));
602 nf.nf_mount = nmp;
603 nf.nf_td = td;
604 nf.nf_lastmsg = NFSD_MONOSEC -
605 ((nmp->nm_tprintf_delay)-(nmp->nm_tprintf_initial_delay));
606 }
607
608 if (nd->nd_procnum == NFSPROC_NULL)
609 auth = authnone_create();
610 else if (usegssname) {
611 /*
612 * For this case, the authenticator is held in the
613 * nfssockreq structure, so don't release the reference count
614 * held on it. --> Don't AUTH_DESTROY() it in this function.
615 */
616 if (nrp->nr_auth == NULL)
617 nrp->nr_auth = nfs_getauth(nrp, secflavour,
618 clnt_principal, srv_principal, NULL, authcred);
619 else
620 rpc_gss_refresh_auth_call(nrp->nr_auth);
621 auth = nrp->nr_auth;
622 } else
623 auth = nfs_getauth(nrp, secflavour, NULL,
624 srv_principal, NULL, authcred);
625 crfree(authcred);
626 if (auth == NULL) {
627 m_freem(nd->nd_mreq);
628 if (set_sigset)
629 newnfs_restore_sigmask(td, &oldset);
630 return (EACCES);
631 }
632 bzero(&ext, sizeof(ext));
633 ext.rc_auth = auth;
634 if (nmp != NULL) {
635 ext.rc_feedback = nfs_feedback;
636 ext.rc_feedback_arg = &nf;
637 }
638
639 procnum = nd->nd_procnum;
640 if ((nd->nd_flag & ND_NFSV4) &&
641 nd->nd_procnum != NFSPROC_NULL &&
642 nd->nd_procnum != NFSV4PROC_CBCOMPOUND)
643 procnum = NFSV4PROC_COMPOUND;
644
645 if (nmp != NULL) {
646 NFSINCRGLOBAL(newnfsstats.rpcrequests);
647
648 /* Map the procnum to the old NFSv2 one, as required. */
649 if ((nd->nd_flag & ND_NFSV2) != 0) {
650 if (nd->nd_procnum < NFS_V3NPROCS)
651 procnum = nfsv2_procid[nd->nd_procnum];
652 else
653 procnum = NFSV2PROC_NOOP;
654 }
655
656 /*
657 * Now only used for the R_DONTRECOVER case, but until that is
658 * supported within the krpc code, I need to keep a queue of
659 * outstanding RPCs for nfsv4 client requests.
660 */
661 if ((nd->nd_flag & ND_NFSV4) && procnum == NFSV4PROC_COMPOUND)
662 MALLOC(rep, struct nfsreq *, sizeof(struct nfsreq),
663 M_NFSDREQ, M_WAITOK);
664 #ifdef KDTRACE_HOOKS
665 if (dtrace_nfscl_nfs234_start_probe != NULL) {
666 uint32_t probe_id;
667 int probe_procnum;
668
669 if (nd->nd_flag & ND_NFSV4) {
670 probe_id =
671 nfscl_nfs4_start_probes[nd->nd_procnum];
672 probe_procnum = nd->nd_procnum;
673 } else if (nd->nd_flag & ND_NFSV3) {
674 probe_id = nfscl_nfs3_start_probes[procnum];
675 probe_procnum = procnum;
676 } else {
677 probe_id =
678 nfscl_nfs2_start_probes[nd->nd_procnum];
679 probe_procnum = procnum;
680 }
681 if (probe_id != 0)
682 (dtrace_nfscl_nfs234_start_probe)
683 (probe_id, vp, nd->nd_mreq, cred,
684 probe_procnum);
685 }
686 #endif
687 }
688 trycnt = 0;
689 freeslot = -1; /* Set to slot that needs to be free'd */
690 tryagain:
691 slot = -1; /* Slot that needs a sequence# increment. */
692 /*
693 * This timeout specifies when a new socket should be created,
694 * along with new xid values. For UDP, this should be done
695 * infrequently, since retransmits of RPC requests should normally
696 * use the same xid.
697 */
698 if (nmp == NULL) {
699 timo.tv_usec = 0;
700 if (clp == NULL)
701 timo.tv_sec = NFSV4_UPCALLTIMEO;
702 else
703 timo.tv_sec = NFSV4_CALLBACKTIMEO;
704 } else {
705 if (nrp->nr_sotype != SOCK_DGRAM) {
706 timo.tv_usec = 0;
707 if ((nmp->nm_flag & NFSMNT_NFSV4))
708 timo.tv_sec = INT_MAX;
709 else
710 timo.tv_sec = NFS_TCPTIMEO;
711 } else {
712 if (NFSHASSOFT(nmp)) {
713 /*
714 * CLSET_RETRIES is set to 2, so this should be
715 * half of the total timeout required.
716 */
717 timeo = nmp->nm_retry * nmp->nm_timeo / 2;
718 if (timeo < 1)
719 timeo = 1;
720 timo.tv_sec = timeo / NFS_HZ;
721 timo.tv_usec = (timeo % NFS_HZ) * 1000000 /
722 NFS_HZ;
723 } else {
724 /* For UDP hard mounts, use a large value. */
725 timo.tv_sec = NFS_MAXTIMEO / NFS_HZ;
726 timo.tv_usec = 0;
727 }
728 }
729
730 if (rep != NULL) {
731 rep->r_flags = 0;
732 rep->r_nmp = nmp;
733 /*
734 * Chain request into list of outstanding requests.
735 */
736 NFSLOCKREQ();
737 TAILQ_INSERT_TAIL(&nfsd_reqq, rep, r_chain);
738 NFSUNLOCKREQ();
739 }
740 }
741
742 nd->nd_mrep = NULL;
743 stat = CLNT_CALL_MBUF(nrp->nr_client, &ext, procnum, nd->nd_mreq,
744 &nd->nd_mrep, timo);
745
746 if (rep != NULL) {
747 /*
748 * RPC done, unlink the request.
749 */
750 NFSLOCKREQ();
751 TAILQ_REMOVE(&nfsd_reqq, rep, r_chain);
752 NFSUNLOCKREQ();
753 }
754
755 /*
756 * If there was a successful reply and a tprintf msg.
757 * tprintf a response.
758 */
759 if (stat == RPC_SUCCESS) {
760 error = 0;
761 } else if (stat == RPC_TIMEDOUT) {
762 NFSINCRGLOBAL(newnfsstats.rpctimeouts);
763 error = ETIMEDOUT;
764 } else if (stat == RPC_VERSMISMATCH) {
765 NFSINCRGLOBAL(newnfsstats.rpcinvalid);
766 error = EOPNOTSUPP;
767 } else if (stat == RPC_PROGVERSMISMATCH) {
768 NFSINCRGLOBAL(newnfsstats.rpcinvalid);
769 error = EPROTONOSUPPORT;
770 } else if (stat == RPC_INTR) {
771 error = EINTR;
772 } else {
773 NFSINCRGLOBAL(newnfsstats.rpcinvalid);
774 error = EACCES;
775 }
776 if (error) {
777 m_freem(nd->nd_mreq);
778 if (usegssname == 0)
779 AUTH_DESTROY(auth);
780 if (rep != NULL)
781 FREE((caddr_t)rep, M_NFSDREQ);
782 if (set_sigset)
783 newnfs_restore_sigmask(td, &oldset);
784 return (error);
785 }
786
787 KASSERT(nd->nd_mrep != NULL, ("mrep shouldn't be NULL if no error\n"));
788
789 /*
790 * Search for any mbufs that are not a multiple of 4 bytes long
791 * or with m_data not longword aligned.
792 * These could cause pointer alignment problems, so copy them to
793 * well aligned mbufs.
794 */
795 newnfs_realign(&nd->nd_mrep, M_WAITOK);
796 nd->nd_md = nd->nd_mrep;
797 nd->nd_dpos = NFSMTOD(nd->nd_md, caddr_t);
798 nd->nd_repstat = 0;
799 if (nd->nd_procnum != NFSPROC_NULL) {
800 /* If sep == NULL, set it to the default in nmp. */
801 if (sep == NULL && nmp != NULL)
802 sep = NFSMNT_MDSSESSION(nmp);
803 /*
804 * and now the actual NFS xdr.
805 */
806 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
807 nd->nd_repstat = fxdr_unsigned(u_int32_t, *tl);
808 if (nd->nd_repstat >= 10000)
809 NFSCL_DEBUG(1, "proc=%d reps=%d\n", (int)nd->nd_procnum,
810 (int)nd->nd_repstat);
811
812 /*
813 * Get rid of the tag, return count and SEQUENCE result for
814 * NFSv4.
815 */
816 if ((nd->nd_flag & ND_NFSV4) != 0) {
817 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
818 i = fxdr_unsigned(int, *tl);
819 error = nfsm_advance(nd, NFSM_RNDUP(i), -1);
820 if (error)
821 goto nfsmout;
822 NFSM_DISSECT(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
823 opcnt = fxdr_unsigned(int, *tl++);
824 i = fxdr_unsigned(int, *tl++);
825 j = fxdr_unsigned(int, *tl);
826 if (j >= 10000)
827 NFSCL_DEBUG(1, "fop=%d fst=%d\n", i, j);
828 /*
829 * If the first op is Sequence, free up the slot.
830 */
831 if (nmp != NULL && i == NFSV4OP_SEQUENCE && j != 0)
832 NFSCL_DEBUG(1, "failed seq=%d\n", j);
833 if (nmp != NULL && i == NFSV4OP_SEQUENCE && j == 0) {
834 NFSM_DISSECT(tl, uint32_t *, NFSX_V4SESSIONID +
835 5 * NFSX_UNSIGNED);
836 mtx_lock(&sep->nfsess_mtx);
837 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED;
838 retseq = fxdr_unsigned(uint32_t, *tl++);
839 slot = fxdr_unsigned(int, *tl++);
840 freeslot = slot;
841 if (retseq != sep->nfsess_slotseq[slot])
842 printf("retseq diff 0x%x\n", retseq);
843 retval = fxdr_unsigned(uint32_t, *++tl);
844 if ((retval + 1) < sep->nfsess_foreslots)
845 sep->nfsess_foreslots = (retval + 1);
846 else if ((retval + 1) > sep->nfsess_foreslots)
847 sep->nfsess_foreslots = (retval < 64) ?
848 (retval + 1) : 64;
849 mtx_unlock(&sep->nfsess_mtx);
850
851 /* Grab the op and status for the next one. */
852 if (opcnt > 1) {
853 NFSM_DISSECT(tl, uint32_t *,
854 2 * NFSX_UNSIGNED);
855 i = fxdr_unsigned(int, *tl++);
856 j = fxdr_unsigned(int, *tl);
857 }
858 }
859 }
860 if (nd->nd_repstat != 0) {
861 if (((nd->nd_repstat == NFSERR_DELAY ||
862 nd->nd_repstat == NFSERR_GRACE) &&
863 (nd->nd_flag & ND_NFSV4) &&
864 nd->nd_procnum != NFSPROC_DELEGRETURN &&
865 nd->nd_procnum != NFSPROC_SETATTR &&
866 nd->nd_procnum != NFSPROC_READ &&
867 nd->nd_procnum != NFSPROC_READDS &&
868 nd->nd_procnum != NFSPROC_WRITE &&
869 nd->nd_procnum != NFSPROC_WRITEDS &&
870 nd->nd_procnum != NFSPROC_OPEN &&
871 nd->nd_procnum != NFSPROC_CREATE &&
872 nd->nd_procnum != NFSPROC_OPENCONFIRM &&
873 nd->nd_procnum != NFSPROC_OPENDOWNGRADE &&
874 nd->nd_procnum != NFSPROC_CLOSE &&
875 nd->nd_procnum != NFSPROC_LOCK &&
876 nd->nd_procnum != NFSPROC_LOCKU) ||
877 (nd->nd_repstat == NFSERR_DELAY &&
878 (nd->nd_flag & ND_NFSV4) == 0) ||
879 nd->nd_repstat == NFSERR_RESOURCE) {
880 if (trylater_delay > NFS_TRYLATERDEL)
881 trylater_delay = NFS_TRYLATERDEL;
882 waituntil = NFSD_MONOSEC + trylater_delay;
883 while (NFSD_MONOSEC < waituntil)
884 (void) nfs_catnap(PZERO, 0, "nfstry");
885 trylater_delay *= 2;
886 if (slot != -1) {
887 mtx_lock(&sep->nfsess_mtx);
888 sep->nfsess_slotseq[slot]++;
889 *nd->nd_slotseq = txdr_unsigned(
890 sep->nfsess_slotseq[slot]);
891 mtx_unlock(&sep->nfsess_mtx);
892 }
893 m_freem(nd->nd_mrep);
894 nd->nd_mrep = NULL;
895 goto tryagain;
896 }
897
898 /*
899 * If the File Handle was stale, invalidate the
900 * lookup cache, just in case.
901 * (vp != NULL implies a client side call)
902 */
903 if (nd->nd_repstat == ESTALE && vp != NULL) {
904 cache_purge(vp);
905 if (ncl_call_invalcaches != NULL)
906 (*ncl_call_invalcaches)(vp);
907 }
908 }
909 if ((nd->nd_flag & ND_NFSV4) != 0) {
910 /* Free the slot, as required. */
911 if (freeslot != -1)
912 nfsv4_freeslot(sep, freeslot);
913 /*
914 * If this op is Putfh, throw its results away.
915 */
916 if (j >= 10000)
917 NFSCL_DEBUG(1, "nop=%d nst=%d\n", i, j);
918 if (nmp != NULL && i == NFSV4OP_PUTFH && j == 0) {
919 NFSM_DISSECT(tl,u_int32_t *,2 * NFSX_UNSIGNED);
920 i = fxdr_unsigned(int, *tl++);
921 j = fxdr_unsigned(int, *tl);
922 if (j >= 10000)
923 NFSCL_DEBUG(1, "n2op=%d n2st=%d\n", i,
924 j);
925 /*
926 * All Compounds that do an Op that must
927 * be in sequence consist of NFSV4OP_PUTFH
928 * followed by one of these. As such, we
929 * can determine if the seqid# should be
930 * incremented, here.
931 */
932 if ((i == NFSV4OP_OPEN ||
933 i == NFSV4OP_OPENCONFIRM ||
934 i == NFSV4OP_OPENDOWNGRADE ||
935 i == NFSV4OP_CLOSE ||
936 i == NFSV4OP_LOCK ||
937 i == NFSV4OP_LOCKU) &&
938 (j == 0 ||
939 (j != NFSERR_STALECLIENTID &&
940 j != NFSERR_STALESTATEID &&
941 j != NFSERR_BADSTATEID &&
942 j != NFSERR_BADSEQID &&
943 j != NFSERR_BADXDR &&
944 j != NFSERR_RESOURCE &&
945 j != NFSERR_NOFILEHANDLE)))
946 nd->nd_flag |= ND_INCRSEQID;
947 }
948 /*
949 * If this op's status is non-zero, mark
950 * that there is no more data to process.
951 */
952 if (j)
953 nd->nd_flag |= ND_NOMOREDATA;
954
955 /*
956 * If R_DONTRECOVER is set, replace the stale error
957 * reply, so that recovery isn't initiated.
958 */
959 if ((nd->nd_repstat == NFSERR_STALECLIENTID ||
960 nd->nd_repstat == NFSERR_BADSESSION ||
961 nd->nd_repstat == NFSERR_STALESTATEID) &&
962 rep != NULL && (rep->r_flags & R_DONTRECOVER))
963 nd->nd_repstat = NFSERR_STALEDONTRECOVER;
964 }
965 }
966
967 #ifdef KDTRACE_HOOKS
968 if (nmp != NULL && dtrace_nfscl_nfs234_done_probe != NULL) {
969 uint32_t probe_id;
970 int probe_procnum;
971
972 if (nd->nd_flag & ND_NFSV4) {
973 probe_id = nfscl_nfs4_done_probes[nd->nd_procnum];
974 probe_procnum = nd->nd_procnum;
975 } else if (nd->nd_flag & ND_NFSV3) {
976 probe_id = nfscl_nfs3_done_probes[procnum];
977 probe_procnum = procnum;
978 } else {
979 probe_id = nfscl_nfs2_done_probes[nd->nd_procnum];
980 probe_procnum = procnum;
981 }
982 if (probe_id != 0)
983 (dtrace_nfscl_nfs234_done_probe)(probe_id, vp,
984 nd->nd_mreq, cred, probe_procnum, 0);
985 }
986 #endif
987
988 m_freem(nd->nd_mreq);
989 if (usegssname == 0)
990 AUTH_DESTROY(auth);
991 if (rep != NULL)
992 FREE((caddr_t)rep, M_NFSDREQ);
993 if (set_sigset)
994 newnfs_restore_sigmask(td, &oldset);
995 return (0);
996 nfsmout:
997 mbuf_freem(nd->nd_mrep);
998 mbuf_freem(nd->nd_mreq);
999 if (usegssname == 0)
1000 AUTH_DESTROY(auth);
1001 if (rep != NULL)
1002 FREE((caddr_t)rep, M_NFSDREQ);
1003 if (set_sigset)
1004 newnfs_restore_sigmask(td, &oldset);
1005 return (error);
1006 }
1007
1008 /*
1009 * Mark all of an nfs mount's outstanding requests with R_SOFTTERM and
1010 * wait for all requests to complete. This is used by forced unmounts
1011 * to terminate any outstanding RPCs.
1012 */
1013 int
newnfs_nmcancelreqs(struct nfsmount * nmp)1014 newnfs_nmcancelreqs(struct nfsmount *nmp)
1015 {
1016
1017 if (nmp->nm_sockreq.nr_client != NULL)
1018 CLNT_CLOSE(nmp->nm_sockreq.nr_client);
1019 return (0);
1020 }
1021
1022 /*
1023 * Any signal that can interrupt an NFS operation in an intr mount
1024 * should be added to this set. SIGSTOP and SIGKILL cannot be masked.
1025 */
1026 int newnfs_sig_set[] = {
1027 SIGINT,
1028 SIGTERM,
1029 SIGHUP,
1030 SIGKILL,
1031 SIGQUIT
1032 };
1033
1034 /*
1035 * Check to see if one of the signals in our subset is pending on
1036 * the process (in an intr mount).
1037 */
1038 static int
nfs_sig_pending(sigset_t set)1039 nfs_sig_pending(sigset_t set)
1040 {
1041 int i;
1042
1043 for (i = 0 ; i < sizeof(newnfs_sig_set)/sizeof(int) ; i++)
1044 if (SIGISMEMBER(set, newnfs_sig_set[i]))
1045 return (1);
1046 return (0);
1047 }
1048
1049 /*
1050 * The set/restore sigmask functions are used to (temporarily) overwrite
1051 * the thread td_sigmask during an RPC call (for example). These are also
1052 * used in other places in the NFS client that might tsleep().
1053 */
1054 void
newnfs_set_sigmask(struct thread * td,sigset_t * oldset)1055 newnfs_set_sigmask(struct thread *td, sigset_t *oldset)
1056 {
1057 sigset_t newset;
1058 int i;
1059 struct proc *p;
1060
1061 SIGFILLSET(newset);
1062 if (td == NULL)
1063 td = curthread; /* XXX */
1064 p = td->td_proc;
1065 /* Remove the NFS set of signals from newset */
1066 PROC_LOCK(p);
1067 mtx_lock(&p->p_sigacts->ps_mtx);
1068 for (i = 0 ; i < sizeof(newnfs_sig_set)/sizeof(int) ; i++) {
1069 /*
1070 * But make sure we leave the ones already masked
1071 * by the process, ie. remove the signal from the
1072 * temporary signalmask only if it wasn't already
1073 * in p_sigmask.
1074 */
1075 if (!SIGISMEMBER(td->td_sigmask, newnfs_sig_set[i]) &&
1076 !SIGISMEMBER(p->p_sigacts->ps_sigignore, newnfs_sig_set[i]))
1077 SIGDELSET(newset, newnfs_sig_set[i]);
1078 }
1079 mtx_unlock(&p->p_sigacts->ps_mtx);
1080 kern_sigprocmask(td, SIG_SETMASK, &newset, oldset,
1081 SIGPROCMASK_PROC_LOCKED);
1082 PROC_UNLOCK(p);
1083 }
1084
1085 void
newnfs_restore_sigmask(struct thread * td,sigset_t * set)1086 newnfs_restore_sigmask(struct thread *td, sigset_t *set)
1087 {
1088 if (td == NULL)
1089 td = curthread; /* XXX */
1090 kern_sigprocmask(td, SIG_SETMASK, set, NULL, 0);
1091 }
1092
1093 /*
1094 * NFS wrapper to msleep(), that shoves a new p_sigmask and restores the
1095 * old one after msleep() returns.
1096 */
1097 int
newnfs_msleep(struct thread * td,void * ident,struct mtx * mtx,int priority,char * wmesg,int timo)1098 newnfs_msleep(struct thread *td, void *ident, struct mtx *mtx, int priority, char *wmesg, int timo)
1099 {
1100 sigset_t oldset;
1101 int error;
1102 struct proc *p;
1103
1104 if ((priority & PCATCH) == 0)
1105 return msleep(ident, mtx, priority, wmesg, timo);
1106 if (td == NULL)
1107 td = curthread; /* XXX */
1108 newnfs_set_sigmask(td, &oldset);
1109 error = msleep(ident, mtx, priority, wmesg, timo);
1110 newnfs_restore_sigmask(td, &oldset);
1111 p = td->td_proc;
1112 return (error);
1113 }
1114
1115 /*
1116 * Test for a termination condition pending on the process.
1117 * This is used for NFSMNT_INT mounts.
1118 */
1119 int
newnfs_sigintr(struct nfsmount * nmp,struct thread * td)1120 newnfs_sigintr(struct nfsmount *nmp, struct thread *td)
1121 {
1122 struct proc *p;
1123 sigset_t tmpset;
1124
1125 /* Terminate all requests while attempting a forced unmount. */
1126 if (nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF)
1127 return (EIO);
1128 if (!(nmp->nm_flag & NFSMNT_INT))
1129 return (0);
1130 if (td == NULL)
1131 return (0);
1132 p = td->td_proc;
1133 PROC_LOCK(p);
1134 tmpset = p->p_siglist;
1135 SIGSETOR(tmpset, td->td_siglist);
1136 SIGSETNAND(tmpset, td->td_sigmask);
1137 mtx_lock(&p->p_sigacts->ps_mtx);
1138 SIGSETNAND(tmpset, p->p_sigacts->ps_sigignore);
1139 mtx_unlock(&p->p_sigacts->ps_mtx);
1140 if ((SIGNOTEMPTY(p->p_siglist) || SIGNOTEMPTY(td->td_siglist))
1141 && nfs_sig_pending(tmpset)) {
1142 PROC_UNLOCK(p);
1143 return (EINTR);
1144 }
1145 PROC_UNLOCK(p);
1146 return (0);
1147 }
1148
1149 static int
nfs_msg(struct thread * td,const char * server,const char * msg,int error)1150 nfs_msg(struct thread *td, const char *server, const char *msg, int error)
1151 {
1152 struct proc *p;
1153
1154 p = td ? td->td_proc : NULL;
1155 if (error) {
1156 tprintf(p, LOG_INFO, "newnfs server %s: %s, error %d\n",
1157 server, msg, error);
1158 } else {
1159 tprintf(p, LOG_INFO, "newnfs server %s: %s\n", server, msg);
1160 }
1161 return (0);
1162 }
1163
1164 static void
nfs_down(struct nfsmount * nmp,struct thread * td,const char * msg,int error,int flags)1165 nfs_down(struct nfsmount *nmp, struct thread *td, const char *msg,
1166 int error, int flags)
1167 {
1168 if (nmp == NULL)
1169 return;
1170 mtx_lock(&nmp->nm_mtx);
1171 if ((flags & NFSSTA_TIMEO) && !(nmp->nm_state & NFSSTA_TIMEO)) {
1172 nmp->nm_state |= NFSSTA_TIMEO;
1173 mtx_unlock(&nmp->nm_mtx);
1174 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid,
1175 VQ_NOTRESP, 0);
1176 } else
1177 mtx_unlock(&nmp->nm_mtx);
1178 mtx_lock(&nmp->nm_mtx);
1179 if ((flags & NFSSTA_LOCKTIMEO) && !(nmp->nm_state & NFSSTA_LOCKTIMEO)) {
1180 nmp->nm_state |= NFSSTA_LOCKTIMEO;
1181 mtx_unlock(&nmp->nm_mtx);
1182 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid,
1183 VQ_NOTRESPLOCK, 0);
1184 } else
1185 mtx_unlock(&nmp->nm_mtx);
1186 nfs_msg(td, nmp->nm_mountp->mnt_stat.f_mntfromname, msg, error);
1187 }
1188
1189 static void
nfs_up(struct nfsmount * nmp,struct thread * td,const char * msg,int flags,int tprintfmsg)1190 nfs_up(struct nfsmount *nmp, struct thread *td, const char *msg,
1191 int flags, int tprintfmsg)
1192 {
1193 if (nmp == NULL)
1194 return;
1195 if (tprintfmsg) {
1196 nfs_msg(td, nmp->nm_mountp->mnt_stat.f_mntfromname, msg, 0);
1197 }
1198
1199 mtx_lock(&nmp->nm_mtx);
1200 if ((flags & NFSSTA_TIMEO) && (nmp->nm_state & NFSSTA_TIMEO)) {
1201 nmp->nm_state &= ~NFSSTA_TIMEO;
1202 mtx_unlock(&nmp->nm_mtx);
1203 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid,
1204 VQ_NOTRESP, 1);
1205 } else
1206 mtx_unlock(&nmp->nm_mtx);
1207
1208 mtx_lock(&nmp->nm_mtx);
1209 if ((flags & NFSSTA_LOCKTIMEO) && (nmp->nm_state & NFSSTA_LOCKTIMEO)) {
1210 nmp->nm_state &= ~NFSSTA_LOCKTIMEO;
1211 mtx_unlock(&nmp->nm_mtx);
1212 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid,
1213 VQ_NOTRESPLOCK, 1);
1214 } else
1215 mtx_unlock(&nmp->nm_mtx);
1216 }
1217
1218