1 /* $NetBSD: nfs_commonkrpc.c,v 1.3 2023/06/16 19:40:46 andvar 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 304026 2016-08-12 22:44:59Z rmacklem "); */
37 __RCSID("$NetBSD: nfs_commonkrpc.c,v 1.3 2023/06/16 19:40:46 andvar Exp $");
38
39 /*
40 * Socket operations for use by nfs
41 */
42
43 #ifdef _KERNEL_OPT
44 #include "opt_dtrace.h"
45 #include "opt_newnfs.h"
46 #if 0
47 #include "opt_kgssapi.h"
48 #endif
49 #endif
50
51 #include <sys/param.h>
52 #include <sys/systm.h>
53 #include <sys/kernel.h>
54 #include <sys/limits.h>
55 #include <sys/lock.h>
56 #include <sys/malloc.h>
57 #include <sys/mbuf.h>
58 #include <sys/mount.h>
59 #include <sys/mutex.h>
60 #include <sys/proc.h>
61 #include <sys/signalvar.h>
62 #include <sys/syscallsubr.h>
63 #include <sys/sysctl.h>
64 #include <sys/syslog.h>
65 #include <sys/vnode.h>
66
67 #include <rpc/rpc.h>
68 #include <fs/nfs/common/krpc.h>
69
70 #include <kgssapi/krb5/kcrypto.h>
71
72 #include <fs/nfs/common/nfsport.h>
73
74 #ifdef KDTRACE_HOOKS
75 #include <sys/dtrace_bsd.h>
76
77 dtrace_nfsclient_nfs23_start_probe_func_t
78 dtrace_nfscl_nfs234_start_probe;
79
80 dtrace_nfsclient_nfs23_done_probe_func_t
81 dtrace_nfscl_nfs234_done_probe;
82
83 /*
84 * Registered probes by RPC type.
85 */
86 uint32_t nfscl_nfs2_start_probes[NFSV41_NPROCS + 1];
87 uint32_t nfscl_nfs2_done_probes[NFSV41_NPROCS + 1];
88
89 uint32_t nfscl_nfs3_start_probes[NFSV41_NPROCS + 1];
90 uint32_t nfscl_nfs3_done_probes[NFSV41_NPROCS + 1];
91
92 uint32_t nfscl_nfs4_start_probes[NFSV41_NPROCS + 1];
93 uint32_t nfscl_nfs4_done_probes[NFSV41_NPROCS + 1];
94 #endif
95
96 NFSSTATESPINLOCK;
97 NFSREQSPINLOCK;
98 NFSDLOCKMUTEX;
99 extern struct nfsstatsv1 nfsstatsv1;
100 extern struct nfsreqhead nfsd_reqq;
101 extern int nfscl_ticks;
102 extern void (*ncl_call_invalcaches)(struct vnode *);
103 extern int nfs_numnfscbd;
104 extern int nfscl_debuglevel;
105
106 SVCPOOL *nfscbd_pool;
107 static int nfsrv_gsscallbackson = 0;
108 static int nfs_bufpackets = 4;
109 static int nfs_reconnects;
110 static int nfs3_jukebox_delay = 10;
111 static int nfs_skip_wcc_data_onerr = 1;
112
113 SYSCTL_DECL(_vfs_nfs);
114
115 SYSCTL_INT(_vfs_nfs, OID_AUTO, bufpackets, CTLFLAG_RW, &nfs_bufpackets, 0,
116 "Buffer reservation size 2 < x < 64");
117 SYSCTL_INT(_vfs_nfs, OID_AUTO, reconnects, CTLFLAG_RD, &nfs_reconnects, 0,
118 "Number of times the nfs client has had to reconnect");
119 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs3_jukebox_delay, CTLFLAG_RW, &nfs3_jukebox_delay, 0,
120 "Number of seconds to delay a retry after receiving EJUKEBOX");
121 SYSCTL_INT(_vfs_nfs, OID_AUTO, skip_wcc_data_onerr, CTLFLAG_RW, &nfs_skip_wcc_data_onerr, 0,
122 "Disable weak cache consistency checking when server returns an error");
123
124 static void nfs_down(struct nfsmount *, struct thread *, const char *,
125 int, int);
126 static void nfs_up(struct nfsmount *, struct thread *, const char *,
127 int, int);
128 static int nfs_msg(struct thread *, const char *, const char *, int);
129
130 struct nfs_cached_auth {
131 int ca_refs; /* refcount, including 1 from the cache */
132 uid_t ca_uid; /* uid that corresponds to this auth */
133 AUTH *ca_auth; /* RPC auth handle */
134 };
135
136 static int nfsv2_procid[NFS_V3NPROCS] = {
137 NFSV2PROC_NULL,
138 NFSV2PROC_GETATTR,
139 NFSV2PROC_SETATTR,
140 NFSV2PROC_LOOKUP,
141 NFSV2PROC_NOOP,
142 NFSV2PROC_READLINK,
143 NFSV2PROC_READ,
144 NFSV2PROC_WRITE,
145 NFSV2PROC_CREATE,
146 NFSV2PROC_MKDIR,
147 NFSV2PROC_SYMLINK,
148 NFSV2PROC_CREATE,
149 NFSV2PROC_REMOVE,
150 NFSV2PROC_RMDIR,
151 NFSV2PROC_RENAME,
152 NFSV2PROC_LINK,
153 NFSV2PROC_READDIR,
154 NFSV2PROC_NOOP,
155 NFSV2PROC_STATFS,
156 NFSV2PROC_NOOP,
157 NFSV2PROC_NOOP,
158 NFSV2PROC_NOOP,
159 };
160
161 /*
162 * Initialize sockets and congestion for a new NFS connection.
163 * We do not free the sockaddr if error.
164 */
165 int
newnfs_connect(struct nfsmount * nmp,struct nfssockreq * nrp,struct ucred * cred,NFSPROC_T * p,int callback_retry_mult)166 newnfs_connect(struct nfsmount *nmp, struct nfssockreq *nrp,
167 struct ucred *cred, NFSPROC_T *p, int callback_retry_mult)
168 {
169 int rcvreserve, sndreserve;
170 int pktscale;
171 struct sockaddr *saddr;
172 struct ucred *origcred;
173 CLIENT *client;
174 struct netconfig *nconf;
175 struct socket *so;
176 int one = 1, retries, error = 0;
177 struct thread *td = curthread;
178 SVCXPRT *xprt;
179 struct timeval timo;
180
181 /*
182 * We need to establish the socket using the credentials of
183 * the mountpoint. Some parts of this process (such as
184 * sobind() and soconnect()) will use the current thread's
185 * credential instead of the socket credential. To work
186 * around this, temporarily change the current thread's
187 * credential to that of the mountpoint.
188 *
189 * XXX: It would be better to explicitly pass the correct
190 * credential to sobind() and soconnect().
191 */
192 origcred = td->td_ucred;
193
194 /*
195 * Use the credential in nr_cred, if not NULL.
196 */
197 if (nrp->nr_cred != NULL)
198 td->td_ucred = nrp->nr_cred;
199 else
200 td->td_ucred = cred;
201 saddr = nrp->nr_nam;
202
203 if (saddr->sa_family == AF_INET)
204 if (nrp->nr_sotype == SOCK_DGRAM)
205 nconf = getnetconfigent("udp");
206 else
207 nconf = getnetconfigent("tcp");
208 else
209 if (nrp->nr_sotype == SOCK_DGRAM)
210 nconf = getnetconfigent("udp6");
211 else
212 nconf = getnetconfigent("tcp6");
213
214 pktscale = nfs_bufpackets;
215 if (pktscale < 2)
216 pktscale = 2;
217 if (pktscale > 64)
218 pktscale = 64;
219 /*
220 * soreserve() can fail if sb_max is too small, so shrink pktscale
221 * and try again if there is an error.
222 * Print a log message suggesting increasing sb_max.
223 * Creating a socket and doing this is necessary since, if the
224 * reservation sizes are too large and will make soreserve() fail,
225 * the connection will work until a large send is attempted and
226 * then it will loop in the krpc code.
227 */
228 so = NULL;
229 saddr = NFSSOCKADDR(nrp->nr_nam, struct sockaddr *);
230 error = socreate(saddr->sa_family, &so, nrp->nr_sotype,
231 nrp->nr_soproto, td->td_ucred, td);
232 if (error) {
233 td->td_ucred = origcred;
234 goto out;
235 }
236 do {
237 if (error != 0 && pktscale > 2)
238 pktscale--;
239 if (nrp->nr_sotype == SOCK_DGRAM) {
240 if (nmp != NULL) {
241 sndreserve = (NFS_MAXDGRAMDATA + NFS_MAXPKTHDR) *
242 pktscale;
243 rcvreserve = (NFS_MAXDGRAMDATA + NFS_MAXPKTHDR) *
244 pktscale;
245 } else {
246 sndreserve = rcvreserve = 1024 * pktscale;
247 }
248 } else {
249 if (nrp->nr_sotype != SOCK_STREAM)
250 panic("nfscon sotype");
251 if (nmp != NULL) {
252 sndreserve = (NFS_MAXBSIZE + NFS_MAXPKTHDR +
253 sizeof (u_int32_t)) * pktscale;
254 rcvreserve = (NFS_MAXBSIZE + NFS_MAXPKTHDR +
255 sizeof (u_int32_t)) * pktscale;
256 } else {
257 sndreserve = rcvreserve = 1024 * pktscale;
258 }
259 }
260 error = soreserve(so, sndreserve, rcvreserve);
261 } while (error != 0 && pktscale > 2);
262 soclose(so);
263 if (error) {
264 td->td_ucred = origcred;
265 goto out;
266 }
267
268 client = clnt_reconnect_create(nconf, saddr, nrp->nr_prog,
269 nrp->nr_vers, sndreserve, rcvreserve);
270 CLNT_CONTROL(client, CLSET_WAITCHAN, "nfsreq");
271 if (nmp != NULL) {
272 if ((nmp->nm_flag & NFSMNT_INT))
273 CLNT_CONTROL(client, CLSET_INTERRUPTIBLE, &one);
274 if ((nmp->nm_flag & NFSMNT_RESVPORT))
275 CLNT_CONTROL(client, CLSET_PRIVPORT, &one);
276 if (NFSHASSOFT(nmp)) {
277 if (nmp->nm_sotype == SOCK_DGRAM)
278 /*
279 * For UDP, the large timeout for a reconnect
280 * will be set to "nm_retry * nm_timeo / 2", so
281 * we only want to do 2 reconnect timeout
282 * retries.
283 */
284 retries = 2;
285 else
286 retries = nmp->nm_retry;
287 } else
288 retries = INT_MAX;
289 if (NFSHASNFSV4N(nmp)) {
290 /*
291 * Make sure the nfscbd_pool doesn't get destroyed
292 * while doing this.
293 */
294 NFSD_LOCK();
295 if (nfs_numnfscbd > 0) {
296 nfs_numnfscbd++;
297 NFSD_UNLOCK();
298 xprt = svc_vc_create_backchannel(nfscbd_pool);
299 CLNT_CONTROL(client, CLSET_BACKCHANNEL, xprt);
300 NFSD_LOCK();
301 nfs_numnfscbd--;
302 if (nfs_numnfscbd == 0)
303 wakeup(&nfs_numnfscbd);
304 }
305 NFSD_UNLOCK();
306 }
307 } else {
308 /*
309 * Three cases:
310 * - Null RPC callback to client
311 * - Non-Null RPC callback to client, wait a little longer
312 * - upcalls to nfsuserd and gssd (clp == NULL)
313 */
314 if (callback_retry_mult == 0) {
315 retries = NFSV4_UPCALLRETRY;
316 CLNT_CONTROL(client, CLSET_PRIVPORT, &one);
317 } else {
318 retries = NFSV4_CALLBACKRETRY * callback_retry_mult;
319 }
320 }
321 CLNT_CONTROL(client, CLSET_RETRIES, &retries);
322
323 if (nmp != NULL) {
324 /*
325 * For UDP, there are 2 timeouts:
326 * - CLSET_RETRY_TIMEOUT sets the initial timeout for the timer
327 * that does a retransmit of an RPC request using the same
328 * socket and xid. This is what you normally want to do,
329 * since NFS servers depend on "same xid" for their
330 * Duplicate Request Cache.
331 * - timeout specified in CLNT_CALL_MBUF(), which specifies when
332 * retransmits on the same socket should fail and a fresh
333 * socket created. Each of these timeouts counts as one
334 * CLSET_RETRIES as set above.
335 * Set the initial retransmit timeout for UDP. This timeout
336 * doesn't exist for TCP and the following call just fails,
337 * which is ok.
338 */
339 timo.tv_sec = nmp->nm_timeo / NFS_HZ;
340 timo.tv_usec = (nmp->nm_timeo % NFS_HZ) * 1000000 / NFS_HZ;
341 CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, &timo);
342 }
343
344 mtx_lock(&nrp->nr_mtx);
345 if (nrp->nr_client != NULL) {
346 mtx_unlock(&nrp->nr_mtx);
347 /*
348 * Someone else already connected.
349 */
350 CLNT_RELEASE(client);
351 } else {
352 nrp->nr_client = client;
353 /*
354 * Protocols that do not require connections may be optionally
355 * left unconnected for servers that reply from a port other
356 * than NFS_PORT.
357 */
358 if (nmp == NULL || (nmp->nm_flag & NFSMNT_NOCONN) == 0) {
359 mtx_unlock(&nrp->nr_mtx);
360 CLNT_CONTROL(client, CLSET_CONNECT, &one);
361 } else
362 mtx_unlock(&nrp->nr_mtx);
363 }
364
365
366 /* Restore current thread's credentials. */
367 td->td_ucred = origcred;
368
369 out:
370 NFSEXITCODE(error);
371 return (error);
372 }
373
374 /*
375 * NFS disconnect. Clean up and unlink.
376 */
377 void
newnfs_disconnect(struct nfssockreq * nrp)378 newnfs_disconnect(struct nfssockreq *nrp)
379 {
380 CLIENT *client;
381
382 mtx_lock(&nrp->nr_mtx);
383 if (nrp->nr_client != NULL) {
384 client = nrp->nr_client;
385 nrp->nr_client = NULL;
386 mtx_unlock(&nrp->nr_mtx);
387 rpc_gss_secpurge_call(client);
388 CLNT_CLOSE(client);
389 CLNT_RELEASE(client);
390 } else {
391 mtx_unlock(&nrp->nr_mtx);
392 }
393 }
394
395 static AUTH *
nfs_getauth(struct nfssockreq * nrp,int secflavour,char * clnt_principal,char * srv_principal,gss_OID mech_oid,struct ucred * cred)396 nfs_getauth(struct nfssockreq *nrp, int secflavour, char *clnt_principal,
397 char *srv_principal, gss_OID mech_oid, struct ucred *cred)
398 {
399 rpc_gss_service_t svc;
400 AUTH *auth;
401
402 switch (secflavour) {
403 case RPCSEC_GSS_KRB5:
404 case RPCSEC_GSS_KRB5I:
405 case RPCSEC_GSS_KRB5P:
406 if (!mech_oid) {
407 if (!rpc_gss_mech_to_oid_call("kerberosv5", &mech_oid))
408 return (NULL);
409 }
410 if (secflavour == RPCSEC_GSS_KRB5)
411 svc = rpc_gss_svc_none;
412 else if (secflavour == RPCSEC_GSS_KRB5I)
413 svc = rpc_gss_svc_integrity;
414 else
415 svc = rpc_gss_svc_privacy;
416
417 if (clnt_principal == NULL)
418 auth = rpc_gss_secfind_call(nrp->nr_client, cred,
419 srv_principal, mech_oid, svc);
420 else {
421 auth = rpc_gss_seccreate_call(nrp->nr_client, cred,
422 clnt_principal, srv_principal, "kerberosv5",
423 svc, NULL, NULL, NULL);
424 return (auth);
425 }
426 if (auth != NULL)
427 return (auth);
428 /* fallthrough */
429 case AUTH_SYS:
430 default:
431 return (authunix_create(cred));
432
433 }
434 }
435
436 /*
437 * Callback from the RPC code to generate up/down notifications.
438 */
439
440 struct nfs_feedback_arg {
441 struct nfsmount *nf_mount;
442 int nf_lastmsg; /* last tprintf */
443 int nf_tprintfmsg;
444 struct thread *nf_td;
445 };
446
447 static void
nfs_feedback(int type,int proc,void * arg)448 nfs_feedback(int type, int proc, void *arg)
449 {
450 struct nfs_feedback_arg *nf = (struct nfs_feedback_arg *) arg;
451 struct nfsmount *nmp = nf->nf_mount;
452 time_t now;
453
454 switch (type) {
455 case FEEDBACK_REXMIT2:
456 case FEEDBACK_RECONNECT:
457 now = NFSD_MONOSEC;
458 if (nf->nf_lastmsg + nmp->nm_tprintf_delay < now) {
459 nfs_down(nmp, nf->nf_td,
460 "not responding", 0, NFSSTA_TIMEO);
461 nf->nf_tprintfmsg = TRUE;
462 nf->nf_lastmsg = now;
463 }
464 break;
465
466 case FEEDBACK_OK:
467 nfs_up(nf->nf_mount, nf->nf_td,
468 "is alive again", NFSSTA_TIMEO, nf->nf_tprintfmsg);
469 break;
470 }
471 }
472
473 /*
474 * newnfs_request - goes something like this
475 * - does the rpc by calling the krpc layer
476 * - break down rpc header and return with nfs reply
477 * nb: always frees up nd_mreq mbuf list
478 */
479 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)480 newnfs_request(struct nfsrv_descript *nd, struct nfsmount *nmp,
481 struct nfsclient *clp, struct nfssockreq *nrp, vnode_t vp,
482 struct thread *td, struct ucred *cred, u_int32_t prog, u_int32_t vers,
483 u_char *retsum, int toplevel, u_int64_t *xidp, struct nfsclsession *sep)
484 {
485 u_int32_t retseq, retval, *tl;
486 time_t waituntil;
487 int i = 0, j = 0, opcnt, set_sigset = 0, slot;
488 int trycnt, error = 0, usegssname = 0, secflavour = AUTH_SYS;
489 int freeslot, timeo;
490 u_int16_t procnum;
491 u_int trylater_delay = 1;
492 struct nfs_feedback_arg nf;
493 struct timeval timo;
494 AUTH *auth;
495 struct rpc_callextra ext;
496 enum clnt_stat stat;
497 struct nfsreq *rep = NULL;
498 char *srv_principal = NULL, *clnt_principal = NULL;
499 sigset_t oldset;
500 struct ucred *authcred;
501
502 if (xidp != NULL)
503 *xidp = 0;
504 /* Reject requests while attempting a forced unmount. */
505 if (nmp != NULL && (nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF)) {
506 m_freem(nd->nd_mreq);
507 return (ESTALE);
508 }
509
510 /*
511 * Set authcred, which is used to acquire RPC credentials to
512 * the cred argument, by default. The crhold() should not be
513 * necessary, but will ensure that some future code change
514 * doesn't result in the credential being free'd prematurely.
515 */
516 authcred = crhold(cred);
517
518 /* For client side interruptible mounts, mask off the signals. */
519 if (nmp != NULL && td != NULL && NFSHASINT(nmp)) {
520 newnfs_set_sigmask(td, &oldset);
521 set_sigset = 1;
522 }
523
524 /*
525 * XXX if not already connected call nfs_connect now. Longer
526 * term, change nfs_mount to call nfs_connect unconditionally
527 * and let clnt_reconnect_create handle reconnects.
528 */
529 if (nrp->nr_client == NULL)
530 newnfs_connect(nmp, nrp, cred, td, 0);
531
532 /*
533 * For a client side mount, nmp is != NULL and clp == NULL. For
534 * server calls (callbacks or upcalls), nmp == NULL.
535 */
536 if (clp != NULL) {
537 NFSLOCKSTATE();
538 if ((clp->lc_flags & LCL_GSS) && nfsrv_gsscallbackson) {
539 secflavour = RPCSEC_GSS_KRB5;
540 if (nd->nd_procnum != NFSPROC_NULL) {
541 if (clp->lc_flags & LCL_GSSINTEGRITY)
542 secflavour = RPCSEC_GSS_KRB5I;
543 else if (clp->lc_flags & LCL_GSSPRIVACY)
544 secflavour = RPCSEC_GSS_KRB5P;
545 }
546 }
547 NFSUNLOCKSTATE();
548 } else if (nmp != NULL && NFSHASKERB(nmp) &&
549 nd->nd_procnum != NFSPROC_NULL) {
550 if (NFSHASALLGSSNAME(nmp) && nmp->nm_krbnamelen > 0)
551 nd->nd_flag |= ND_USEGSSNAME;
552 if ((nd->nd_flag & ND_USEGSSNAME) != 0) {
553 /*
554 * If there is a client side host based credential,
555 * use that, otherwise use the system uid, if set.
556 * The system uid is in the nmp->nm_sockreq.nr_cred
557 * credentials.
558 */
559 if (nmp->nm_krbnamelen > 0) {
560 usegssname = 1;
561 clnt_principal = nmp->nm_krbname;
562 } else if (nmp->nm_uid != (uid_t)-1) {
563 KASSERT(nmp->nm_sockreq.nr_cred != NULL,
564 ("newnfs_request: NULL nr_cred"));
565 crfree(authcred);
566 authcred = crhold(nmp->nm_sockreq.nr_cred);
567 }
568 } else if (nmp->nm_krbnamelen == 0 &&
569 nmp->nm_uid != (uid_t)-1 && cred->cr_uid == (uid_t)0) {
570 /*
571 * If there is no host based principal name and
572 * the system uid is set and this is root, use the
573 * system uid, since root won't have user
574 * credentials in a credentials cache file.
575 * The system uid is in the nmp->nm_sockreq.nr_cred
576 * credentials.
577 */
578 KASSERT(nmp->nm_sockreq.nr_cred != NULL,
579 ("newnfs_request: NULL nr_cred"));
580 crfree(authcred);
581 authcred = crhold(nmp->nm_sockreq.nr_cred);
582 }
583 if (NFSHASINTEGRITY(nmp))
584 secflavour = RPCSEC_GSS_KRB5I;
585 else if (NFSHASPRIVACY(nmp))
586 secflavour = RPCSEC_GSS_KRB5P;
587 else
588 secflavour = RPCSEC_GSS_KRB5;
589 srv_principal = NFSMNT_SRVKRBNAME(nmp);
590 } else if (nmp != NULL && !NFSHASKERB(nmp) &&
591 nd->nd_procnum != NFSPROC_NULL &&
592 (nd->nd_flag & ND_USEGSSNAME) != 0) {
593 /*
594 * Use the uid that did the mount when the RPC is doing
595 * NFSv4 system operations, as indicated by the
596 * ND_USEGSSNAME flag, for the AUTH_SYS case.
597 * The credentials in nm_sockreq.nr_cred were used for the
598 * mount.
599 */
600 KASSERT(nmp->nm_sockreq.nr_cred != NULL,
601 ("newnfs_request: NULL nr_cred"));
602 crfree(authcred);
603 authcred = crhold(nmp->nm_sockreq.nr_cred);
604 }
605
606 if (nmp != NULL) {
607 bzero(&nf, sizeof(struct nfs_feedback_arg));
608 nf.nf_mount = nmp;
609 nf.nf_td = td;
610 nf.nf_lastmsg = NFSD_MONOSEC -
611 ((nmp->nm_tprintf_delay)-(nmp->nm_tprintf_initial_delay));
612 }
613
614 if (nd->nd_procnum == NFSPROC_NULL)
615 auth = authnone_create();
616 else if (usegssname) {
617 /*
618 * For this case, the authenticator is held in the
619 * nfssockreq structure, so don't release the reference count
620 * held on it. --> Don't AUTH_DESTROY() it in this function.
621 */
622 if (nrp->nr_auth == NULL)
623 nrp->nr_auth = nfs_getauth(nrp, secflavour,
624 clnt_principal, srv_principal, NULL, authcred);
625 else
626 rpc_gss_refresh_auth_call(nrp->nr_auth);
627 auth = nrp->nr_auth;
628 } else
629 auth = nfs_getauth(nrp, secflavour, NULL,
630 srv_principal, NULL, authcred);
631 crfree(authcred);
632 if (auth == NULL) {
633 m_freem(nd->nd_mreq);
634 if (set_sigset)
635 newnfs_restore_sigmask(td, &oldset);
636 return (EACCES);
637 }
638 bzero(&ext, sizeof(ext));
639 ext.rc_auth = auth;
640 if (nmp != NULL) {
641 ext.rc_feedback = nfs_feedback;
642 ext.rc_feedback_arg = &nf;
643 }
644
645 procnum = nd->nd_procnum;
646 if ((nd->nd_flag & ND_NFSV4) &&
647 nd->nd_procnum != NFSPROC_NULL &&
648 nd->nd_procnum != NFSV4PROC_CBCOMPOUND)
649 procnum = NFSV4PROC_COMPOUND;
650
651 if (nmp != NULL) {
652 NFSINCRGLOBAL(nfsstatsv1.rpcrequests);
653
654 /* Map the procnum to the old NFSv2 one, as required. */
655 if ((nd->nd_flag & ND_NFSV2) != 0) {
656 if (nd->nd_procnum < NFS_V3NPROCS)
657 procnum = nfsv2_procid[nd->nd_procnum];
658 else
659 procnum = NFSV2PROC_NOOP;
660 }
661
662 /*
663 * Now only used for the R_DONTRECOVER case, but until that is
664 * supported within the krpc code, I need to keep a queue of
665 * outstanding RPCs for nfsv4 client requests.
666 */
667 if ((nd->nd_flag & ND_NFSV4) && procnum == NFSV4PROC_COMPOUND)
668 MALLOC(rep, struct nfsreq *, sizeof(struct nfsreq),
669 M_NFSDREQ, M_WAITOK);
670 #ifdef KDTRACE_HOOKS
671 if (dtrace_nfscl_nfs234_start_probe != NULL) {
672 uint32_t probe_id;
673 int probe_procnum;
674
675 if (nd->nd_flag & ND_NFSV4) {
676 probe_id =
677 nfscl_nfs4_start_probes[nd->nd_procnum];
678 probe_procnum = nd->nd_procnum;
679 } else if (nd->nd_flag & ND_NFSV3) {
680 probe_id = nfscl_nfs3_start_probes[procnum];
681 probe_procnum = procnum;
682 } else {
683 probe_id =
684 nfscl_nfs2_start_probes[nd->nd_procnum];
685 probe_procnum = procnum;
686 }
687 if (probe_id != 0)
688 (dtrace_nfscl_nfs234_start_probe)
689 (probe_id, vp, nd->nd_mreq, cred,
690 probe_procnum);
691 }
692 #endif
693 }
694 trycnt = 0;
695 freeslot = -1; /* Set to slot that needs to be free'd */
696 tryagain:
697 slot = -1; /* Slot that needs a sequence# increment. */
698 /*
699 * This timeout specifies when a new socket should be created,
700 * along with new xid values. For UDP, this should be done
701 * infrequently, since retransmits of RPC requests should normally
702 * use the same xid.
703 */
704 if (nmp == NULL) {
705 timo.tv_usec = 0;
706 if (clp == NULL)
707 timo.tv_sec = NFSV4_UPCALLTIMEO;
708 else
709 timo.tv_sec = NFSV4_CALLBACKTIMEO;
710 } else {
711 if (nrp->nr_sotype != SOCK_DGRAM) {
712 timo.tv_usec = 0;
713 if ((nmp->nm_flag & NFSMNT_NFSV4))
714 timo.tv_sec = INT_MAX;
715 else
716 timo.tv_sec = NFS_TCPTIMEO;
717 } else {
718 if (NFSHASSOFT(nmp)) {
719 /*
720 * CLSET_RETRIES is set to 2, so this should be
721 * half of the total timeout required.
722 */
723 timeo = nmp->nm_retry * nmp->nm_timeo / 2;
724 if (timeo < 1)
725 timeo = 1;
726 timo.tv_sec = timeo / NFS_HZ;
727 timo.tv_usec = (timeo % NFS_HZ) * 1000000 /
728 NFS_HZ;
729 } else {
730 /* For UDP hard mounts, use a large value. */
731 timo.tv_sec = NFS_MAXTIMEO / NFS_HZ;
732 timo.tv_usec = 0;
733 }
734 }
735
736 if (rep != NULL) {
737 rep->r_flags = 0;
738 rep->r_nmp = nmp;
739 /*
740 * Chain request into list of outstanding requests.
741 */
742 NFSLOCKREQ();
743 TAILQ_INSERT_TAIL(&nfsd_reqq, rep, r_chain);
744 NFSUNLOCKREQ();
745 }
746 }
747
748 nd->nd_mrep = NULL;
749 if (clp != NULL && sep != NULL)
750 stat = clnt_bck_call(nrp->nr_client, &ext, procnum,
751 nd->nd_mreq, &nd->nd_mrep, timo, sep->nfsess_xprt);
752 else
753 stat = CLNT_CALL_MBUF(nrp->nr_client, &ext, procnum,
754 nd->nd_mreq, &nd->nd_mrep, timo);
755
756 if (rep != NULL) {
757 /*
758 * RPC done, unlink the request.
759 */
760 NFSLOCKREQ();
761 TAILQ_REMOVE(&nfsd_reqq, rep, r_chain);
762 NFSUNLOCKREQ();
763 }
764
765 /*
766 * If there was a successful reply and a tprintf msg.
767 * tprintf a response.
768 */
769 if (stat == RPC_SUCCESS) {
770 error = 0;
771 } else if (stat == RPC_TIMEDOUT) {
772 NFSINCRGLOBAL(nfsstatsv1.rpctimeouts);
773 error = ETIMEDOUT;
774 } else if (stat == RPC_VERSMISMATCH) {
775 NFSINCRGLOBAL(nfsstatsv1.rpcinvalid);
776 error = EOPNOTSUPP;
777 } else if (stat == RPC_PROGVERSMISMATCH) {
778 NFSINCRGLOBAL(nfsstatsv1.rpcinvalid);
779 error = EPROTONOSUPPORT;
780 } else if (stat == RPC_INTR) {
781 error = EINTR;
782 } else {
783 NFSINCRGLOBAL(nfsstatsv1.rpcinvalid);
784 error = EACCES;
785 }
786 if (error) {
787 m_freem(nd->nd_mreq);
788 if (usegssname == 0)
789 AUTH_DESTROY(auth);
790 if (rep != NULL)
791 FREE((caddr_t)rep, M_NFSDREQ);
792 if (set_sigset)
793 newnfs_restore_sigmask(td, &oldset);
794 return (error);
795 }
796
797 KASSERT(nd->nd_mrep != NULL, ("mrep shouldn't be NULL if no error\n"));
798
799 /*
800 * Search for any mbufs that are not a multiple of 4 bytes long
801 * or with m_data not longword aligned.
802 * These could cause pointer alignment problems, so copy them to
803 * well aligned mbufs.
804 */
805 newnfs_realign(&nd->nd_mrep, M_WAITOK);
806 nd->nd_md = nd->nd_mrep;
807 nd->nd_dpos = NFSMTOD(nd->nd_md, caddr_t);
808 nd->nd_repstat = 0;
809 if (nd->nd_procnum != NFSPROC_NULL &&
810 nd->nd_procnum != NFSV4PROC_CBNULL) {
811 /* If sep == NULL, set it to the default in nmp. */
812 if (sep == NULL && nmp != NULL)
813 sep = NFSMNT_MDSSESSION(nmp);
814 /*
815 * and now the actual NFS xdr.
816 */
817 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
818 nd->nd_repstat = fxdr_unsigned(u_int32_t, *tl);
819 if (nd->nd_repstat >= 10000)
820 NFSCL_DEBUG(1, "proc=%d reps=%d\n", (int)nd->nd_procnum,
821 (int)nd->nd_repstat);
822
823 /*
824 * Get rid of the tag, return count and SEQUENCE result for
825 * NFSv4.
826 */
827 if ((nd->nd_flag & ND_NFSV4) != 0) {
828 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
829 i = fxdr_unsigned(int, *tl);
830 error = nfsm_advance(nd, NFSM_RNDUP(i), -1);
831 if (error)
832 goto nfsmout;
833 NFSM_DISSECT(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
834 opcnt = fxdr_unsigned(int, *tl++);
835 i = fxdr_unsigned(int, *tl++);
836 j = fxdr_unsigned(int, *tl);
837 if (j >= 10000)
838 NFSCL_DEBUG(1, "fop=%d fst=%d\n", i, j);
839 /*
840 * If the first op is Sequence, free up the slot.
841 */
842 if ((nmp != NULL && i == NFSV4OP_SEQUENCE && j != 0) ||
843 (clp != NULL && i == NFSV4OP_CBSEQUENCE && j != 0))
844 NFSCL_DEBUG(1, "failed seq=%d\n", j);
845 if ((nmp != NULL && i == NFSV4OP_SEQUENCE && j == 0) ||
846 (clp != NULL && i == NFSV4OP_CBSEQUENCE && j == 0)
847 ) {
848 if (i == NFSV4OP_SEQUENCE)
849 NFSM_DISSECT(tl, uint32_t *,
850 NFSX_V4SESSIONID +
851 5 * NFSX_UNSIGNED);
852 else
853 NFSM_DISSECT(tl, uint32_t *,
854 NFSX_V4SESSIONID +
855 4 * NFSX_UNSIGNED);
856 mtx_lock(&sep->nfsess_mtx);
857 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED;
858 retseq = fxdr_unsigned(uint32_t, *tl++);
859 slot = fxdr_unsigned(int, *tl++);
860 freeslot = slot;
861 if (retseq != sep->nfsess_slotseq[slot])
862 printf("retseq diff 0x%x\n", retseq);
863 retval = fxdr_unsigned(uint32_t, *++tl);
864 if ((retval + 1) < sep->nfsess_foreslots)
865 sep->nfsess_foreslots = (retval + 1);
866 else if ((retval + 1) > sep->nfsess_foreslots)
867 sep->nfsess_foreslots = (retval < 64) ?
868 (retval + 1) : 64;
869 mtx_unlock(&sep->nfsess_mtx);
870
871 /* Grab the op and status for the next one. */
872 if (opcnt > 1) {
873 NFSM_DISSECT(tl, uint32_t *,
874 2 * NFSX_UNSIGNED);
875 i = fxdr_unsigned(int, *tl++);
876 j = fxdr_unsigned(int, *tl);
877 }
878 }
879 }
880 if (nd->nd_repstat != 0) {
881 if (((nd->nd_repstat == NFSERR_DELAY ||
882 nd->nd_repstat == NFSERR_GRACE) &&
883 (nd->nd_flag & ND_NFSV4) &&
884 nd->nd_procnum != NFSPROC_DELEGRETURN &&
885 nd->nd_procnum != NFSPROC_SETATTR &&
886 nd->nd_procnum != NFSPROC_READ &&
887 nd->nd_procnum != NFSPROC_READDS &&
888 nd->nd_procnum != NFSPROC_WRITE &&
889 nd->nd_procnum != NFSPROC_WRITEDS &&
890 nd->nd_procnum != NFSPROC_OPEN &&
891 nd->nd_procnum != NFSPROC_CREATE &&
892 nd->nd_procnum != NFSPROC_OPENCONFIRM &&
893 nd->nd_procnum != NFSPROC_OPENDOWNGRADE &&
894 nd->nd_procnum != NFSPROC_CLOSE &&
895 nd->nd_procnum != NFSPROC_LOCK &&
896 nd->nd_procnum != NFSPROC_LOCKU) ||
897 (nd->nd_repstat == NFSERR_DELAY &&
898 (nd->nd_flag & ND_NFSV4) == 0) ||
899 nd->nd_repstat == NFSERR_RESOURCE) {
900 if (trylater_delay > NFS_TRYLATERDEL)
901 trylater_delay = NFS_TRYLATERDEL;
902 waituntil = NFSD_MONOSEC + trylater_delay;
903 while (NFSD_MONOSEC < waituntil)
904 (void) nfs_catnap(PZERO, 0, "nfstry");
905 trylater_delay *= 2;
906 if (slot != -1) {
907 mtx_lock(&sep->nfsess_mtx);
908 sep->nfsess_slotseq[slot]++;
909 *nd->nd_slotseq = txdr_unsigned(
910 sep->nfsess_slotseq[slot]);
911 mtx_unlock(&sep->nfsess_mtx);
912 }
913 m_freem(nd->nd_mrep);
914 nd->nd_mrep = NULL;
915 goto tryagain;
916 }
917
918 /*
919 * If the File Handle was stale, invalidate the
920 * lookup cache, just in case.
921 * (vp != NULL implies a client side call)
922 */
923 if (nd->nd_repstat == ESTALE && vp != NULL) {
924 cache_purge(vp);
925 if (ncl_call_invalcaches != NULL)
926 (*ncl_call_invalcaches)(vp);
927 }
928 }
929 if ((nd->nd_flag & ND_NFSV4) != 0) {
930 /* Free the slot, as required. */
931 if (freeslot != -1)
932 nfsv4_freeslot(sep, freeslot);
933 /*
934 * If this op is Putfh, throw its results away.
935 */
936 if (j >= 10000)
937 NFSCL_DEBUG(1, "nop=%d nst=%d\n", i, j);
938 if (nmp != NULL && i == NFSV4OP_PUTFH && j == 0) {
939 NFSM_DISSECT(tl,u_int32_t *,2 * NFSX_UNSIGNED);
940 i = fxdr_unsigned(int, *tl++);
941 j = fxdr_unsigned(int, *tl);
942 if (j >= 10000)
943 NFSCL_DEBUG(1, "n2op=%d n2st=%d\n", i,
944 j);
945 /*
946 * All Compounds that do an Op that must
947 * be in sequence consist of NFSV4OP_PUTFH
948 * followed by one of these. As such, we
949 * can determine if the seqid# should be
950 * incremented, here.
951 */
952 if ((i == NFSV4OP_OPEN ||
953 i == NFSV4OP_OPENCONFIRM ||
954 i == NFSV4OP_OPENDOWNGRADE ||
955 i == NFSV4OP_CLOSE ||
956 i == NFSV4OP_LOCK ||
957 i == NFSV4OP_LOCKU) &&
958 (j == 0 ||
959 (j != NFSERR_STALECLIENTID &&
960 j != NFSERR_STALESTATEID &&
961 j != NFSERR_BADSTATEID &&
962 j != NFSERR_BADSEQID &&
963 j != NFSERR_BADXDR &&
964 j != NFSERR_RESOURCE &&
965 j != NFSERR_NOFILEHANDLE)))
966 nd->nd_flag |= ND_INCRSEQID;
967 }
968 /*
969 * If this op's status is non-zero, mark
970 * that there is no more data to process.
971 */
972 if (j)
973 nd->nd_flag |= ND_NOMOREDATA;
974
975 /*
976 * If R_DONTRECOVER is set, replace the stale error
977 * reply, so that recovery isn't initiated.
978 */
979 if ((nd->nd_repstat == NFSERR_STALECLIENTID ||
980 nd->nd_repstat == NFSERR_BADSESSION ||
981 nd->nd_repstat == NFSERR_STALESTATEID) &&
982 rep != NULL && (rep->r_flags & R_DONTRECOVER))
983 nd->nd_repstat = NFSERR_STALEDONTRECOVER;
984 }
985 }
986
987 #ifdef KDTRACE_HOOKS
988 if (nmp != NULL && dtrace_nfscl_nfs234_done_probe != NULL) {
989 uint32_t probe_id;
990 int probe_procnum;
991
992 if (nd->nd_flag & ND_NFSV4) {
993 probe_id = nfscl_nfs4_done_probes[nd->nd_procnum];
994 probe_procnum = nd->nd_procnum;
995 } else if (nd->nd_flag & ND_NFSV3) {
996 probe_id = nfscl_nfs3_done_probes[procnum];
997 probe_procnum = procnum;
998 } else {
999 probe_id = nfscl_nfs2_done_probes[nd->nd_procnum];
1000 probe_procnum = procnum;
1001 }
1002 if (probe_id != 0)
1003 (dtrace_nfscl_nfs234_done_probe)(probe_id, vp,
1004 nd->nd_mreq, cred, probe_procnum, 0);
1005 }
1006 #endif
1007
1008 m_freem(nd->nd_mreq);
1009 if (usegssname == 0)
1010 AUTH_DESTROY(auth);
1011 if (rep != NULL)
1012 FREE((caddr_t)rep, M_NFSDREQ);
1013 if (set_sigset)
1014 newnfs_restore_sigmask(td, &oldset);
1015 return (0);
1016 nfsmout:
1017 mbuf_freem(nd->nd_mrep);
1018 mbuf_freem(nd->nd_mreq);
1019 if (usegssname == 0)
1020 AUTH_DESTROY(auth);
1021 if (rep != NULL)
1022 FREE((caddr_t)rep, M_NFSDREQ);
1023 if (set_sigset)
1024 newnfs_restore_sigmask(td, &oldset);
1025 return (error);
1026 }
1027
1028 /*
1029 * Mark all of an nfs mount's outstanding requests with R_SOFTTERM and
1030 * wait for all requests to complete. This is used by forced unmounts
1031 * to terminate any outstanding RPCs.
1032 */
1033 int
newnfs_nmcancelreqs(struct nfsmount * nmp)1034 newnfs_nmcancelreqs(struct nfsmount *nmp)
1035 {
1036
1037 if (nmp->nm_sockreq.nr_client != NULL)
1038 CLNT_CLOSE(nmp->nm_sockreq.nr_client);
1039 return (0);
1040 }
1041
1042 /*
1043 * Any signal that can interrupt an NFS operation in an intr mount
1044 * should be added to this set. SIGSTOP and SIGKILL cannot be masked.
1045 */
1046 int newnfs_sig_set[] = {
1047 SIGINT,
1048 SIGTERM,
1049 SIGHUP,
1050 SIGKILL,
1051 SIGQUIT
1052 };
1053
1054 /*
1055 * Check to see if one of the signals in our subset is pending on
1056 * the process (in an intr mount).
1057 */
1058 static int
nfs_sig_pending(sigset_t set)1059 nfs_sig_pending(sigset_t set)
1060 {
1061 int i;
1062
1063 for (i = 0 ; i < nitems(newnfs_sig_set); i++)
1064 if (SIGISMEMBER(set, newnfs_sig_set[i]))
1065 return (1);
1066 return (0);
1067 }
1068
1069 /*
1070 * The set/restore sigmask functions are used to (temporarily) overwrite
1071 * the thread td_sigmask during an RPC call (for example). These are also
1072 * used in other places in the NFS client that might tsleep().
1073 */
1074 void
newnfs_set_sigmask(struct thread * td,sigset_t * oldset)1075 newnfs_set_sigmask(struct thread *td, sigset_t *oldset)
1076 {
1077 sigset_t newset;
1078 int i;
1079 struct proc *p;
1080
1081 SIGFILLSET(newset);
1082 if (td == NULL)
1083 td = curthread; /* XXX */
1084 p = td->td_proc;
1085 /* Remove the NFS set of signals from newset */
1086 PROC_LOCK(p);
1087 mtx_lock(&p->p_sigacts->ps_mtx);
1088 for (i = 0 ; i < nitems(newnfs_sig_set); i++) {
1089 /*
1090 * But make sure we leave the ones already masked
1091 * by the process, ie. remove the signal from the
1092 * temporary signalmask only if it wasn't already
1093 * in p_sigmask.
1094 */
1095 if (!SIGISMEMBER(td->td_sigmask, newnfs_sig_set[i]) &&
1096 !SIGISMEMBER(p->p_sigacts->ps_sigignore, newnfs_sig_set[i]))
1097 SIGDELSET(newset, newnfs_sig_set[i]);
1098 }
1099 mtx_unlock(&p->p_sigacts->ps_mtx);
1100 kern_sigprocmask(td, SIG_SETMASK, &newset, oldset,
1101 SIGPROCMASK_PROC_LOCKED);
1102 PROC_UNLOCK(p);
1103 }
1104
1105 void
newnfs_restore_sigmask(struct thread * td,sigset_t * set)1106 newnfs_restore_sigmask(struct thread *td, sigset_t *set)
1107 {
1108 if (td == NULL)
1109 td = curthread; /* XXX */
1110 kern_sigprocmask(td, SIG_SETMASK, set, NULL, 0);
1111 }
1112
1113 /*
1114 * NFS wrapper to msleep(), that shoves a new p_sigmask and restores the
1115 * old one after msleep() returns.
1116 */
1117 int
newnfs_msleep(struct thread * td,void * ident,struct mtx * mtx,int priority,char * wmesg,int timo)1118 newnfs_msleep(struct thread *td, void *ident, struct mtx *mtx, int priority, char *wmesg, int timo)
1119 {
1120 sigset_t oldset;
1121 int error;
1122 struct proc *p;
1123
1124 if ((priority & PCATCH) == 0)
1125 return msleep(ident, mtx, priority, wmesg, timo);
1126 if (td == NULL)
1127 td = curthread; /* XXX */
1128 newnfs_set_sigmask(td, &oldset);
1129 error = msleep(ident, mtx, priority, wmesg, timo);
1130 newnfs_restore_sigmask(td, &oldset);
1131 p = td->td_proc;
1132 return (error);
1133 }
1134
1135 /*
1136 * Test for a termination condition pending on the process.
1137 * This is used for NFSMNT_INT mounts.
1138 */
1139 int
newnfs_sigintr(struct nfsmount * nmp,struct thread * td)1140 newnfs_sigintr(struct nfsmount *nmp, struct thread *td)
1141 {
1142 struct proc *p;
1143 sigset_t tmpset;
1144
1145 /* Terminate all requests while attempting a forced unmount. */
1146 if (nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF)
1147 return (EIO);
1148 if (!(nmp->nm_flag & NFSMNT_INT))
1149 return (0);
1150 if (td == NULL)
1151 return (0);
1152 p = td->td_proc;
1153 PROC_LOCK(p);
1154 tmpset = p->p_siglist;
1155 SIGSETOR(tmpset, td->td_siglist);
1156 SIGSETNAND(tmpset, td->td_sigmask);
1157 mtx_lock(&p->p_sigacts->ps_mtx);
1158 SIGSETNAND(tmpset, p->p_sigacts->ps_sigignore);
1159 mtx_unlock(&p->p_sigacts->ps_mtx);
1160 if ((SIGNOTEMPTY(p->p_siglist) || SIGNOTEMPTY(td->td_siglist))
1161 && nfs_sig_pending(tmpset)) {
1162 PROC_UNLOCK(p);
1163 return (EINTR);
1164 }
1165 PROC_UNLOCK(p);
1166 return (0);
1167 }
1168
1169 static int
nfs_msg(struct thread * td,const char * server,const char * msg,int error)1170 nfs_msg(struct thread *td, const char *server, const char *msg, int error)
1171 {
1172 struct proc *p;
1173
1174 p = td ? td->td_proc : NULL;
1175 if (error) {
1176 tprintf(p, LOG_INFO, "nfs server %s: %s, error %d\n",
1177 server, msg, error);
1178 } else {
1179 tprintf(p, LOG_INFO, "nfs server %s: %s\n", server, msg);
1180 }
1181 return (0);
1182 }
1183
1184 static void
nfs_down(struct nfsmount * nmp,struct thread * td,const char * msg,int error,int flags)1185 nfs_down(struct nfsmount *nmp, struct thread *td, const char *msg,
1186 int error, int flags)
1187 {
1188 if (nmp == NULL)
1189 return;
1190 mtx_lock(&nmp->nm_mtx);
1191 if ((flags & NFSSTA_TIMEO) && !(nmp->nm_state & NFSSTA_TIMEO)) {
1192 nmp->nm_state |= NFSSTA_TIMEO;
1193 mtx_unlock(&nmp->nm_mtx);
1194 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid,
1195 VQ_NOTRESP, 0);
1196 } else
1197 mtx_unlock(&nmp->nm_mtx);
1198 mtx_lock(&nmp->nm_mtx);
1199 if ((flags & NFSSTA_LOCKTIMEO) && !(nmp->nm_state & NFSSTA_LOCKTIMEO)) {
1200 nmp->nm_state |= NFSSTA_LOCKTIMEO;
1201 mtx_unlock(&nmp->nm_mtx);
1202 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid,
1203 VQ_NOTRESPLOCK, 0);
1204 } else
1205 mtx_unlock(&nmp->nm_mtx);
1206 nfs_msg(td, nmp->nm_mountp->mnt_stat.f_mntfromname, msg, error);
1207 }
1208
1209 static void
nfs_up(struct nfsmount * nmp,struct thread * td,const char * msg,int flags,int tprintfmsg)1210 nfs_up(struct nfsmount *nmp, struct thread *td, const char *msg,
1211 int flags, int tprintfmsg)
1212 {
1213 if (nmp == NULL)
1214 return;
1215 if (tprintfmsg) {
1216 nfs_msg(td, nmp->nm_mountp->mnt_stat.f_mntfromname, msg, 0);
1217 }
1218
1219 mtx_lock(&nmp->nm_mtx);
1220 if ((flags & NFSSTA_TIMEO) && (nmp->nm_state & NFSSTA_TIMEO)) {
1221 nmp->nm_state &= ~NFSSTA_TIMEO;
1222 mtx_unlock(&nmp->nm_mtx);
1223 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid,
1224 VQ_NOTRESP, 1);
1225 } else
1226 mtx_unlock(&nmp->nm_mtx);
1227
1228 mtx_lock(&nmp->nm_mtx);
1229 if ((flags & NFSSTA_LOCKTIMEO) && (nmp->nm_state & NFSSTA_LOCKTIMEO)) {
1230 nmp->nm_state &= ~NFSSTA_LOCKTIMEO;
1231 mtx_unlock(&nmp->nm_mtx);
1232 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid,
1233 VQ_NOTRESPLOCK, 1);
1234 } else
1235 mtx_unlock(&nmp->nm_mtx);
1236 }
1237
1238