2 * Copyright (c) 1989, 1991, 1993, 1995
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
6 * Rick Macklem at The University of Guelph.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 4. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * @(#)nfs_socket.c 8.5 (Berkeley) 3/30/95
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
39 * Socket operations for use by nfs
42 #include "opt_inet6.h"
43 #include "opt_kdtrace.h"
44 #include "opt_kgssapi.h"
46 #include <sys/param.h>
47 #include <sys/systm.h>
48 #include <sys/kernel.h>
49 #include <sys/limits.h>
51 #include <sys/malloc.h>
53 #include <sys/mount.h>
54 #include <sys/mutex.h>
56 #include <sys/signalvar.h>
57 #include <sys/syscallsubr.h>
58 #include <sys/sysctl.h>
59 #include <sys/syslog.h>
60 #include <sys/vnode.h>
64 #include <nfs/nfsproto.h>
65 #include <nfsclient/nfs.h>
66 #include <nfs/xdr_subs.h>
67 #include <nfsclient/nfsm_subs.h>
68 #include <nfsclient/nfsmount.h>
69 #include <nfsclient/nfsnode.h>
72 #include <sys/dtrace_bsd.h>
74 dtrace_nfsclient_nfs23_start_probe_func_t
75 dtrace_nfsclient_nfs23_start_probe;
77 dtrace_nfsclient_nfs23_done_probe_func_t
78 dtrace_nfsclient_nfs23_done_probe;
81 * Registered probes by RPC type.
83 uint32_t nfsclient_nfs2_start_probes[NFS_NPROCS];
84 uint32_t nfsclient_nfs2_done_probes[NFS_NPROCS];
86 uint32_t nfsclient_nfs3_start_probes[NFS_NPROCS];
87 uint32_t nfsclient_nfs3_done_probes[NFS_NPROCS];
90 static int nfs_bufpackets = 4;
91 static int nfs_reconnects;
92 static int nfs3_jukebox_delay = 10;
93 static int nfs_skip_wcc_data_onerr = 1;
94 static int fake_wchan;
96 SYSCTL_DECL(_vfs_oldnfs);
98 SYSCTL_INT(_vfs_oldnfs, OID_AUTO, bufpackets, CTLFLAG_RW, &nfs_bufpackets, 0,
99 "Buffer reservation size 2 < x < 64");
100 SYSCTL_INT(_vfs_oldnfs, OID_AUTO, reconnects, CTLFLAG_RD, &nfs_reconnects, 0,
101 "Number of times the nfs client has had to reconnect");
102 SYSCTL_INT(_vfs_oldnfs, OID_AUTO, nfs3_jukebox_delay, CTLFLAG_RW,
103 &nfs3_jukebox_delay, 0,
104 "Number of seconds to delay a retry after receiving EJUKEBOX");
105 SYSCTL_INT(_vfs_oldnfs, OID_AUTO, skip_wcc_data_onerr, CTLFLAG_RW,
106 &nfs_skip_wcc_data_onerr, 0,
107 "Disable weak cache consistency checking when server returns an error");
109 static void nfs_down(struct nfsmount *, struct thread *, const char *,
111 static void nfs_up(struct nfsmount *, struct thread *, const char *,
113 static int nfs_msg(struct thread *, const char *, const char *, int);
115 extern int nfsv2_procid[];
117 struct nfs_cached_auth {
118 int ca_refs; /* refcount, including 1 from the cache */
119 uid_t ca_uid; /* uid that corresponds to this auth */
120 AUTH *ca_auth; /* RPC auth handle */
127 static enum nfs_rto_timer_t nfs_proct[NFS_NPROCS] = {
128 NFS_DEFAULT_TIMER, /* NULL */
129 NFS_GETATTR_TIMER, /* GETATTR */
130 NFS_DEFAULT_TIMER, /* SETATTR */
131 NFS_LOOKUP_TIMER, /* LOOKUP */
132 NFS_GETATTR_TIMER, /* ACCESS */
133 NFS_READ_TIMER, /* READLINK */
134 NFS_READ_TIMER, /* READ */
135 NFS_WRITE_TIMER, /* WRITE */
136 NFS_DEFAULT_TIMER, /* CREATE */
137 NFS_DEFAULT_TIMER, /* MKDIR */
138 NFS_DEFAULT_TIMER, /* SYMLINK */
139 NFS_DEFAULT_TIMER, /* MKNOD */
140 NFS_DEFAULT_TIMER, /* REMOVE */
141 NFS_DEFAULT_TIMER, /* RMDIR */
142 NFS_DEFAULT_TIMER, /* RENAME */
143 NFS_DEFAULT_TIMER, /* LINK */
144 NFS_READ_TIMER, /* READDIR */
145 NFS_READ_TIMER, /* READDIRPLUS */
146 NFS_DEFAULT_TIMER, /* FSSTAT */
147 NFS_DEFAULT_TIMER, /* FSINFO */
148 NFS_DEFAULT_TIMER, /* PATHCONF */
149 NFS_DEFAULT_TIMER, /* COMMIT */
150 NFS_DEFAULT_TIMER, /* NOOP */
154 * Choose the correct RTT timer for this NFS procedure.
156 static inline enum nfs_rto_timer_t
157 nfs_rto_timer(u_int32_t procnum)
160 return (nfs_proct[procnum]);
164 * Initialize the RTT estimator state for a new mount point.
167 nfs_init_rtt(struct nfsmount *nmp)
171 for (i = 0; i < NFS_MAX_TIMER; i++) {
172 nmp->nm_timers[i].rt_srtt = hz;
173 nmp->nm_timers[i].rt_deviate = 0;
174 nmp->nm_timers[i].rt_rtxcur = hz;
179 * Initialize sockets and congestion for a new NFS connection.
180 * We do not free the sockaddr if error.
183 nfs_connect(struct nfsmount *nmp)
185 int rcvreserve, sndreserve;
187 struct sockaddr *saddr;
188 struct ucred *origcred;
189 struct thread *td = curthread;
191 struct netconfig *nconf;
193 int one = 1, retries;
196 * We need to establish the socket using the credentials of
197 * the mountpoint. Some parts of this process (such as
198 * sobind() and soconnect()) will use the curent thread's
199 * credential instead of the socket credential. To work
200 * around this, temporarily change the current thread's
201 * credential to that of the mountpoint.
203 * XXX: It would be better to explicitly pass the correct
204 * credential to sobind() and soconnect().
206 origcred = td->td_ucred;
207 td->td_ucred = nmp->nm_mountp->mnt_cred;
211 if (nmp->nm_flag & NFSMNT_NFSV3)
213 else if (nmp->nm_flag & NFSMNT_NFSV4)
215 if (saddr->sa_family == AF_INET)
216 if (nmp->nm_sotype == SOCK_DGRAM)
217 nconf = getnetconfigent("udp");
219 nconf = getnetconfigent("tcp");
221 if (nmp->nm_sotype == SOCK_DGRAM)
222 nconf = getnetconfigent("udp6");
224 nconf = getnetconfigent("tcp6");
227 * Get buffer reservation size from sysctl, but impose reasonable
230 pktscale = nfs_bufpackets;
235 mtx_lock(&nmp->nm_mtx);
236 if (nmp->nm_sotype == SOCK_DGRAM) {
237 sndreserve = (nmp->nm_wsize + NFS_MAXPKTHDR) * pktscale;
238 rcvreserve = (max(nmp->nm_rsize, nmp->nm_readdirsize) +
239 NFS_MAXPKTHDR) * pktscale;
240 } else if (nmp->nm_sotype == SOCK_SEQPACKET) {
241 sndreserve = (nmp->nm_wsize + NFS_MAXPKTHDR) * pktscale;
242 rcvreserve = (max(nmp->nm_rsize, nmp->nm_readdirsize) +
243 NFS_MAXPKTHDR) * pktscale;
245 if (nmp->nm_sotype != SOCK_STREAM)
246 panic("nfscon sotype");
247 sndreserve = (nmp->nm_wsize + NFS_MAXPKTHDR +
248 sizeof (u_int32_t)) * pktscale;
249 rcvreserve = (nmp->nm_rsize + NFS_MAXPKTHDR +
250 sizeof (u_int32_t)) * pktscale;
252 mtx_unlock(&nmp->nm_mtx);
254 client = clnt_reconnect_create(nconf, saddr, NFS_PROG, vers,
255 sndreserve, rcvreserve);
256 CLNT_CONTROL(client, CLSET_WAITCHAN, "nfsreq");
257 if (nmp->nm_flag & NFSMNT_INT)
258 CLNT_CONTROL(client, CLSET_INTERRUPTIBLE, &one);
259 if (nmp->nm_flag & NFSMNT_RESVPORT)
260 CLNT_CONTROL(client, CLSET_PRIVPORT, &one);
261 if (nmp->nm_flag & NFSMNT_SOFT)
262 retries = nmp->nm_retry;
265 CLNT_CONTROL(client, CLSET_RETRIES, &retries);
267 mtx_lock(&nmp->nm_mtx);
268 if (nmp->nm_client) {
270 * Someone else already connected.
272 CLNT_RELEASE(client);
274 nmp->nm_client = client;
277 * Protocols that do not require connections may be optionally left
278 * unconnected for servers that reply from a port other than NFS_PORT.
280 if (!(nmp->nm_flag & NFSMNT_NOCONN)) {
281 mtx_unlock(&nmp->nm_mtx);
282 CLNT_CONTROL(client, CLSET_CONNECT, &one);
284 mtx_unlock(&nmp->nm_mtx);
286 /* Restore current thread's credentials. */
287 td->td_ucred = origcred;
289 mtx_lock(&nmp->nm_mtx);
290 /* Initialize other non-zero congestion variables. */
292 mtx_unlock(&nmp->nm_mtx);
297 * NFS disconnect. Clean up and unlink.
300 nfs_disconnect(struct nfsmount *nmp)
304 mtx_lock(&nmp->nm_mtx);
305 if (nmp->nm_client) {
306 client = nmp->nm_client;
307 nmp->nm_client = NULL;
308 mtx_unlock(&nmp->nm_mtx);
309 rpc_gss_secpurge_call(client);
311 CLNT_RELEASE(client);
313 mtx_unlock(&nmp->nm_mtx);
317 nfs_safedisconnect(struct nfsmount *nmp)
324 nfs_getauth(struct nfsmount *nmp, struct ucred *cred)
326 rpc_gss_service_t svc;
329 switch (nmp->nm_secflavor) {
330 case RPCSEC_GSS_KRB5:
331 case RPCSEC_GSS_KRB5I:
332 case RPCSEC_GSS_KRB5P:
333 if (!nmp->nm_mech_oid)
334 if (!rpc_gss_mech_to_oid_call("kerberosv5",
337 if (nmp->nm_secflavor == RPCSEC_GSS_KRB5)
338 svc = rpc_gss_svc_none;
339 else if (nmp->nm_secflavor == RPCSEC_GSS_KRB5I)
340 svc = rpc_gss_svc_integrity;
342 svc = rpc_gss_svc_privacy;
343 auth = rpc_gss_secfind_call(nmp->nm_client, cred,
344 nmp->nm_principal, nmp->nm_mech_oid, svc);
350 return (authunix_create(cred));
356 * Callback from the RPC code to generate up/down notifications.
359 struct nfs_feedback_arg {
360 struct nfsmount *nf_mount;
361 int nf_lastmsg; /* last tprintf */
363 struct thread *nf_td;
367 nfs_feedback(int type, int proc, void *arg)
369 struct nfs_feedback_arg *nf = (struct nfs_feedback_arg *) arg;
370 struct nfsmount *nmp = nf->nf_mount;
373 getmicrouptime(&now);
376 case FEEDBACK_REXMIT2:
377 case FEEDBACK_RECONNECT:
378 if (nf->nf_lastmsg + nmp->nm_tprintf_delay < now.tv_sec) {
379 nfs_down(nmp, nf->nf_td,
380 "not responding", 0, NFSSTA_TIMEO);
381 nf->nf_tprintfmsg = TRUE;
382 nf->nf_lastmsg = now.tv_sec;
387 nfs_up(nf->nf_mount, nf->nf_td,
388 "is alive again", NFSSTA_TIMEO, nf->nf_tprintfmsg);
394 * nfs_request - goes something like this
395 * - fill in request struct
396 * - links it into list
397 * - calls nfs_send() for first transmit
398 * - calls nfs_receive() to get reply
399 * - break down rpc header and return with nfs reply pointed to
401 * nb: always frees up mreq mbuf list
404 nfs_request(struct vnode *vp, struct mbuf *mreq, int procnum,
405 struct thread *td, struct ucred *cred, struct mbuf **mrp,
406 struct mbuf **mdp, caddr_t *dposp)
410 struct nfsmount *nmp;
417 enum nfs_rto_timer_t timer;
418 struct nfs_feedback_arg nf;
419 struct rpc_callextra ext;
423 /* Reject requests while attempting a forced unmount. */
424 if (vp->v_mount->mnt_kern_flag & MNTK_UNMOUNTF) {
428 nmp = VFSTONFS(vp->v_mount);
429 bzero(&nf, sizeof(struct nfs_feedback_arg));
432 getmicrouptime(&now);
433 nf.nf_lastmsg = now.tv_sec -
434 ((nmp->nm_tprintf_delay) - (nmp->nm_tprintf_initial_delay));
437 * XXX if not already connected call nfs_connect now. Longer
438 * term, change nfs_mount to call nfs_connect unconditionally
439 * and let clnt_reconnect_create handle reconnects.
444 auth = nfs_getauth(nmp, cred);
449 bzero(&ext, sizeof(ext));
452 ext.rc_feedback = nfs_feedback;
453 ext.rc_feedback_arg = &nf;
456 * Use a conservative timeout for RPCs other than getattr,
457 * lookup, read or write. The justification for doing "other"
458 * this way is that these RPCs happen so infrequently that
459 * timer est. would probably be stale. Also, since many of
460 * these RPCs are non-idempotent, a conservative timeout is
463 timer = nfs_rto_timer(procnum);
464 if (timer != NFS_DEFAULT_TIMER)
465 ext.rc_timers = &nmp->nm_timers[timer - 1];
467 ext.rc_timers = NULL;
470 if (dtrace_nfsclient_nfs23_start_probe != NULL) {
474 if (nmp->nm_flag & NFSMNT_NFSV3) {
475 probe_id = nfsclient_nfs3_start_probes[procnum];
476 probe_procnum = procnum;
478 probe_id = nfsclient_nfs2_start_probes[procnum];
479 probe_procnum = nfsv2_procid[procnum];
482 (dtrace_nfsclient_nfs23_start_probe)(probe_id, vp,
483 mreq, cred, probe_procnum);
487 nfsstats.rpcrequests++;
489 timo.tv_sec = nmp->nm_timeo / NFS_HZ;
490 timo.tv_usec = (nmp->nm_timeo * 1000000) / NFS_HZ;
492 stat = CLNT_CALL_MBUF(nmp->nm_client, &ext,
493 (nmp->nm_flag & NFSMNT_NFSV3) ? procnum : nfsv2_procid[procnum],
497 * If there was a successful reply and a tprintf msg.
498 * tprintf a response.
500 if (stat == RPC_SUCCESS)
502 else if (stat == RPC_TIMEDOUT)
504 else if (stat == RPC_VERSMISMATCH)
506 else if (stat == RPC_PROGVERSMISMATCH)
507 error = EPROTONOSUPPORT;
513 KASSERT(mrep != NULL, ("mrep shouldn't be NULL if no error\n"));
516 * Search for any mbufs that are not a multiple of 4 bytes long
517 * or with m_data not longword aligned.
518 * These could cause pointer alignment problems, so copy them to
519 * well aligned mbufs.
521 error = nfs_realign(&mrep, M_DONTWAIT);
522 if (error == ENOMEM) {
529 dpos = mtod(mrep, caddr_t);
530 tl = nfsm_dissect(u_int32_t *, NFSX_UNSIGNED);
532 error = fxdr_unsigned(int, *tl);
533 if ((nmp->nm_flag & NFSMNT_NFSV3) &&
534 error == NFSERR_TRYLATER) {
537 waituntil = time_second + nfs3_jukebox_delay;
538 while (time_second < waituntil)
539 (void)tsleep(&fake_wchan, PSOCK, "nqnfstry",
545 * If the File Handle was stale, invalidate the lookup
546 * cache, just in case.
551 * Skip wcc data on NFS errors for now. NetApp filers
552 * return corrupt postop attrs in the wcc data for NFS
553 * err EROFS. Not sure if they could return corrupt
554 * postop attrs for others errors.
556 if ((nmp->nm_flag & NFSMNT_NFSV3) &&
557 !nfs_skip_wcc_data_onerr) {
561 error |= NFSERR_RETERR;
568 if (dtrace_nfsclient_nfs23_done_probe != NULL) {
572 if (nmp->nm_flag & NFSMNT_NFSV3) {
573 probe_id = nfsclient_nfs3_done_probes[procnum];
574 probe_procnum = procnum;
576 probe_id = nfsclient_nfs2_done_probes[procnum];
577 probe_procnum = (nmp->nm_flag & NFSMNT_NFSV3) ?
578 procnum : nfsv2_procid[procnum];
581 (dtrace_nfsclient_nfs23_done_probe)(probe_id, vp,
582 mreq, cred, probe_procnum, 0);
594 if (dtrace_nfsclient_nfs23_done_probe != NULL) {
598 if (nmp->nm_flag & NFSMNT_NFSV3) {
599 probe_id = nfsclient_nfs3_done_probes[procnum];
600 probe_procnum = procnum;
602 probe_id = nfsclient_nfs2_done_probes[procnum];
603 probe_procnum = (nmp->nm_flag & NFSMNT_NFSV3) ?
604 procnum : nfsv2_procid[procnum];
607 (dtrace_nfsclient_nfs23_done_probe)(probe_id, vp,
608 mreq, cred, probe_procnum, error);
618 * Mark all of an nfs mount's outstanding requests with R_SOFTTERM and
619 * wait for all requests to complete. This is used by forced unmounts
620 * to terminate any outstanding RPCs.
623 nfs_nmcancelreqs(struct nfsmount *nmp)
627 CLNT_CLOSE(nmp->nm_client);
632 * Any signal that can interrupt an NFS operation in an intr mount
633 * should be added to this set. SIGSTOP and SIGKILL cannot be masked.
635 int nfs_sig_set[] = {
645 * Check to see if one of the signals in our subset is pending on
646 * the process (in an intr mount).
649 nfs_sig_pending(sigset_t set)
653 for (i = 0 ; i < sizeof(nfs_sig_set)/sizeof(int) ; i++)
654 if (SIGISMEMBER(set, nfs_sig_set[i]))
660 * The set/restore sigmask functions are used to (temporarily) overwrite
661 * the process p_sigmask during an RPC call (for example). These are also
662 * used in other places in the NFS client that might tsleep().
665 nfs_set_sigmask(struct thread *td, sigset_t *oldset)
673 td = curthread; /* XXX */
675 /* Remove the NFS set of signals from newset. */
677 mtx_lock(&p->p_sigacts->ps_mtx);
678 for (i = 0 ; i < sizeof(nfs_sig_set)/sizeof(int) ; i++) {
680 * But make sure we leave the ones already masked
681 * by the process, i.e. remove the signal from the
682 * temporary signalmask only if it wasn't already
685 if (!SIGISMEMBER(td->td_sigmask, nfs_sig_set[i]) &&
686 !SIGISMEMBER(p->p_sigacts->ps_sigignore, nfs_sig_set[i]))
687 SIGDELSET(newset, nfs_sig_set[i]);
689 mtx_unlock(&p->p_sigacts->ps_mtx);
691 kern_sigprocmask(td, SIG_SETMASK, &newset, oldset, 0);
695 nfs_restore_sigmask(struct thread *td, sigset_t *set)
698 td = curthread; /* XXX */
699 kern_sigprocmask(td, SIG_SETMASK, set, NULL, 0);
703 * NFS wrapper to msleep(), that shoves a new p_sigmask and restores the
704 * old one after msleep() returns.
707 nfs_msleep(struct thread *td, void *ident, struct mtx *mtx, int priority,
708 char *wmesg, int timo)
714 if ((priority & PCATCH) == 0)
715 return msleep(ident, mtx, priority, wmesg, timo);
717 td = curthread; /* XXX */
718 nfs_set_sigmask(td, &oldset);
719 error = msleep(ident, mtx, priority, wmesg, timo);
720 nfs_restore_sigmask(td, &oldset);
726 * Test for a termination condition pending on the process.
727 * This is used for NFSMNT_INT mounts.
730 nfs_sigintr(struct nfsmount *nmp, struct thread *td)
735 /* Terminate all requests while attempting a forced unmount. */
736 if (nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF)
738 if (!(nmp->nm_flag & NFSMNT_INT))
744 tmpset = p->p_siglist;
745 SIGSETOR(tmpset, td->td_siglist);
746 SIGSETNAND(tmpset, td->td_sigmask);
747 mtx_lock(&p->p_sigacts->ps_mtx);
748 SIGSETNAND(tmpset, p->p_sigacts->ps_sigignore);
749 mtx_unlock(&p->p_sigacts->ps_mtx);
750 if ((SIGNOTEMPTY(p->p_siglist) || SIGNOTEMPTY(td->td_siglist))
751 && nfs_sig_pending(tmpset)) {
760 nfs_msg(struct thread *td, const char *server, const char *msg, int error)
764 p = td ? td->td_proc : NULL;
766 tprintf(p, LOG_INFO, "nfs server %s: %s, error %d\n", server,
769 tprintf(p, LOG_INFO, "nfs server %s: %s\n", server, msg);
774 nfs_down(struct nfsmount *nmp, struct thread *td, const char *msg,
775 int error, int flags)
779 mtx_lock(&nmp->nm_mtx);
780 if ((flags & NFSSTA_TIMEO) && !(nmp->nm_state & NFSSTA_TIMEO)) {
781 nmp->nm_state |= NFSSTA_TIMEO;
782 mtx_unlock(&nmp->nm_mtx);
783 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid,
786 mtx_unlock(&nmp->nm_mtx);
787 mtx_lock(&nmp->nm_mtx);
788 if ((flags & NFSSTA_LOCKTIMEO) &&
789 !(nmp->nm_state & NFSSTA_LOCKTIMEO)) {
790 nmp->nm_state |= NFSSTA_LOCKTIMEO;
791 mtx_unlock(&nmp->nm_mtx);
792 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid,
795 mtx_unlock(&nmp->nm_mtx);
796 nfs_msg(td, nmp->nm_mountp->mnt_stat.f_mntfromname, msg, error);
800 nfs_up(struct nfsmount *nmp, struct thread *td, const char *msg,
801 int flags, int tprintfmsg)
806 nfs_msg(td, nmp->nm_mountp->mnt_stat.f_mntfromname, msg, 0);
808 mtx_lock(&nmp->nm_mtx);
809 if ((flags & NFSSTA_TIMEO) && (nmp->nm_state & NFSSTA_TIMEO)) {
810 nmp->nm_state &= ~NFSSTA_TIMEO;
811 mtx_unlock(&nmp->nm_mtx);
812 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid,
815 mtx_unlock(&nmp->nm_mtx);
817 mtx_lock(&nmp->nm_mtx);
818 if ((flags & NFSSTA_LOCKTIMEO) &&
819 (nmp->nm_state & NFSSTA_LOCKTIMEO)) {
820 nmp->nm_state &= ~NFSSTA_LOCKTIMEO;
821 mtx_unlock(&nmp->nm_mtx);
822 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid,
825 mtx_unlock(&nmp->nm_mtx);