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
34 #include <sys/cdefs.h>
35 __FBSDID("$FreeBSD$");
38 * Socket operations for use by nfs
41 #include "opt_inet6.h"
42 #include "opt_kgssapi.h"
45 #include <sys/param.h>
46 #include <sys/systm.h>
47 #include <sys/kernel.h>
48 #include <sys/limits.h>
50 #include <sys/malloc.h>
52 #include <sys/mount.h>
53 #include <sys/mutex.h>
55 #include <sys/signalvar.h>
56 #include <sys/syscallsubr.h>
57 #include <sys/sysctl.h>
58 #include <sys/syslog.h>
59 #include <sys/vnode.h>
63 #include <kgssapi/krb5/kcrypto.h>
65 #include <fs/nfs/nfsport.h>
69 extern struct nfsstats newnfsstats;
70 extern struct nfsreqhead nfsd_reqq;
71 extern int nfscl_ticks;
72 extern void (*ncl_call_invalcaches)(struct vnode *);
74 static int nfsrv_gsscallbackson = 0;
75 static int nfs_bufpackets = 4;
76 static int nfs_reconnects;
77 static int nfs3_jukebox_delay = 10;
78 static int nfs_skip_wcc_data_onerr = 1;
79 static int nfs_keytab_enctype = ETYPE_DES_CBC_CRC;
81 SYSCTL_DECL(_vfs_newnfs);
83 SYSCTL_INT(_vfs_newnfs, OID_AUTO, bufpackets, CTLFLAG_RW, &nfs_bufpackets, 0,
84 "Buffer reservation size 2 < x < 64");
85 SYSCTL_INT(_vfs_newnfs, OID_AUTO, reconnects, CTLFLAG_RD, &nfs_reconnects, 0,
86 "Number of times the nfs client has had to reconnect");
87 SYSCTL_INT(_vfs_newnfs, OID_AUTO, nfs3_jukebox_delay, CTLFLAG_RW, &nfs3_jukebox_delay, 0,
88 "Number of seconds to delay a retry after receiving EJUKEBOX");
89 SYSCTL_INT(_vfs_newnfs, OID_AUTO, skip_wcc_data_onerr, CTLFLAG_RW, &nfs_skip_wcc_data_onerr, 0,
90 "Disable weak cache consistency checking when server returns an error");
91 SYSCTL_INT(_vfs_newnfs, OID_AUTO, keytab_enctype, CTLFLAG_RW, &nfs_keytab_enctype, 0,
92 "Encryption type for the keytab entry used by nfs");
94 static void nfs_down(struct nfsmount *, struct thread *, const char *,
96 static void nfs_up(struct nfsmount *, struct thread *, const char *,
98 static int nfs_msg(struct thread *, const char *, const char *, int);
100 extern int nfsv2_procid[];
102 struct nfs_cached_auth {
103 int ca_refs; /* refcount, including 1 from the cache */
104 uid_t ca_uid; /* uid that corresponds to this auth */
105 AUTH *ca_auth; /* RPC auth handle */
109 * Initialize sockets and congestion for a new NFS connection.
110 * We do not free the sockaddr if error.
113 newnfs_connect(struct nfsmount *nmp, struct nfssockreq *nrp,
114 struct ucred *cred, NFSPROC_T *p, int callback_retry_mult)
116 int rcvreserve, sndreserve;
118 struct sockaddr *saddr;
119 struct ucred *origcred;
121 struct netconfig *nconf;
123 int one = 1, retries, error, printsbmax = 0;
124 struct thread *td = curthread;
127 * We need to establish the socket using the credentials of
128 * the mountpoint. Some parts of this process (such as
129 * sobind() and soconnect()) will use the curent thread's
130 * credential instead of the socket credential. To work
131 * around this, temporarily change the current thread's
132 * credential to that of the mountpoint.
134 * XXX: It would be better to explicitly pass the correct
135 * credential to sobind() and soconnect().
137 origcred = td->td_ucred;
140 * Use the credential in nr_cred, if not NULL.
142 if (nrp->nr_cred != NULL)
143 td->td_ucred = nrp->nr_cred;
148 if (saddr->sa_family == AF_INET)
149 if (nrp->nr_sotype == SOCK_DGRAM)
150 nconf = getnetconfigent("udp");
152 nconf = getnetconfigent("tcp");
154 if (nrp->nr_sotype == SOCK_DGRAM)
155 nconf = getnetconfigent("udp6");
157 nconf = getnetconfigent("tcp6");
159 pktscale = nfs_bufpackets;
165 * soreserve() can fail if sb_max is too small, so shrink pktscale
166 * and try again if there is an error.
167 * Print a log message suggesting increasing sb_max.
168 * Creating a socket and doing this is necessary since, if the
169 * reservation sizes are too large and will make soreserve() fail,
170 * the connection will work until a large send is attempted and
171 * then it will loop in the krpc code.
174 saddr = NFSSOCKADDR(nrp->nr_nam, struct sockaddr *);
175 error = socreate(saddr->sa_family, &so, nrp->nr_sotype,
176 nrp->nr_soproto, td->td_ucred, td);
178 td->td_ucred = origcred;
182 if (error != 0 && pktscale > 2) {
184 if (printsbmax == 0) {
185 printf("nfscl: consider increasing kern.ipc.maxsockbuf\n");
189 if (nrp->nr_sotype == SOCK_DGRAM) {
191 sndreserve = (NFS_MAXDGRAMDATA + NFS_MAXPKTHDR) *
193 rcvreserve = (NFS_MAXDGRAMDATA + NFS_MAXPKTHDR) *
196 sndreserve = rcvreserve = 1024 * pktscale;
199 if (nrp->nr_sotype != SOCK_STREAM)
200 panic("nfscon sotype");
202 sndreserve = (NFS_MAXBSIZE + NFS_MAXPKTHDR +
203 sizeof (u_int32_t)) * pktscale;
204 rcvreserve = (NFS_MAXBSIZE + NFS_MAXPKTHDR +
205 sizeof (u_int32_t)) * pktscale;
207 sndreserve = rcvreserve = 1024 * pktscale;
210 error = soreserve(so, sndreserve, rcvreserve);
211 } while (error != 0 && pktscale > 2);
214 td->td_ucred = origcred;
218 client = clnt_reconnect_create(nconf, saddr, nrp->nr_prog,
219 nrp->nr_vers, sndreserve, rcvreserve);
220 CLNT_CONTROL(client, CLSET_WAITCHAN, "newnfsreq");
222 if ((nmp->nm_flag & NFSMNT_INT))
223 CLNT_CONTROL(client, CLSET_INTERRUPTIBLE, &one);
224 if ((nmp->nm_flag & NFSMNT_RESVPORT))
225 CLNT_CONTROL(client, CLSET_PRIVPORT, &one);
227 retries = nmp->nm_retry;
233 * - Null RPC callback to client
234 * - Non-Null RPC callback to client, wait a little longer
235 * - upcalls to nfsuserd and gssd (clp == NULL)
237 if (callback_retry_mult == 0) {
238 retries = NFSV4_UPCALLRETRY;
239 CLNT_CONTROL(client, CLSET_PRIVPORT, &one);
241 retries = NFSV4_CALLBACKRETRY * callback_retry_mult;
244 CLNT_CONTROL(client, CLSET_RETRIES, &retries);
246 mtx_lock(&nrp->nr_mtx);
247 if (nrp->nr_client != NULL) {
249 * Someone else already connected.
251 CLNT_RELEASE(client);
253 nrp->nr_client = client;
257 * Protocols that do not require connections may be optionally left
258 * unconnected for servers that reply from a port other than NFS_PORT.
260 if (nmp == NULL || (nmp->nm_flag & NFSMNT_NOCONN) == 0) {
261 mtx_unlock(&nrp->nr_mtx);
262 CLNT_CONTROL(client, CLSET_CONNECT, &one);
264 mtx_unlock(&nrp->nr_mtx);
267 /* Restore current thread's credentials. */
268 td->td_ucred = origcred;
273 * NFS disconnect. Clean up and unlink.
276 newnfs_disconnect(struct nfssockreq *nrp)
280 mtx_lock(&nrp->nr_mtx);
281 if (nrp->nr_client != NULL) {
282 client = nrp->nr_client;
283 nrp->nr_client = NULL;
284 mtx_unlock(&nrp->nr_mtx);
286 rpc_gss_secpurge(client);
289 CLNT_RELEASE(client);
291 mtx_unlock(&nrp->nr_mtx);
296 nfs_getauth(struct nfssockreq *nrp, int secflavour, char *clnt_principal,
297 char *srv_principal, gss_OID mech_oid, struct ucred *cred)
300 rpc_gss_service_t svc;
303 rpc_gss_options_req_t req_options;
307 switch (secflavour) {
309 case RPCSEC_GSS_KRB5:
310 case RPCSEC_GSS_KRB5I:
311 case RPCSEC_GSS_KRB5P:
313 if (!rpc_gss_mech_to_oid("kerberosv5", &mech_oid))
316 if (secflavour == RPCSEC_GSS_KRB5)
317 svc = rpc_gss_svc_none;
318 else if (secflavour == RPCSEC_GSS_KRB5I)
319 svc = rpc_gss_svc_integrity;
321 svc = rpc_gss_svc_privacy;
323 req_options.req_flags = GSS_C_MUTUAL_FLAG;
324 req_options.time_req = 0;
325 req_options.my_cred = GSS_C_NO_CREDENTIAL;
326 req_options.input_channel_bindings = NULL;
327 req_options.enc_type = nfs_keytab_enctype;
329 auth = rpc_gss_secfind(nrp->nr_client, cred,
330 clnt_principal, srv_principal, mech_oid, svc,
334 * Until changes to the rpcsec_gss code are committed,
335 * there is no support for host based initiator
336 * principals. As such, that case cannot yet be handled.
338 if (clnt_principal == NULL)
339 auth = rpc_gss_secfind(nrp->nr_client, cred,
340 srv_principal, 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 * newnfs_request - goes something like this
395 * - does the rpc by calling the krpc layer
396 * - break down rpc header and return with nfs reply
397 * nb: always frees up nd_mreq mbuf list
400 newnfs_request(struct nfsrv_descript *nd, struct nfsmount *nmp,
401 struct nfsclient *clp, struct nfssockreq *nrp, vnode_t vp,
402 struct thread *td, struct ucred *cred, u_int32_t prog, u_int32_t vers,
403 u_char *retsum, int toplevel, u_int64_t *xidp)
407 int i, j, set_uid = 0, set_sigset = 0;
408 int trycnt, error = 0, usegssname = 0, secflavour = AUTH_SYS;
410 u_int trylater_delay = 1;
411 struct nfs_feedback_arg nf;
412 struct timeval timo, now;
414 struct rpc_callextra ext;
416 struct nfsreq *rep = NULL;
417 char *srv_principal = NULL;
418 uid_t saved_uid = (uid_t)-1;
423 /* Reject requests while attempting a forced unmount. */
424 if (nmp != NULL && (nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF)) {
425 m_freem(nd->nd_mreq);
429 /* For client side interruptible mounts, mask off the signals. */
430 if (nmp != NULL && td != NULL && NFSHASINT(nmp)) {
431 newnfs_set_sigmask(td, &oldset);
436 * XXX if not already connected call nfs_connect now. Longer
437 * term, change nfs_mount to call nfs_connect unconditionally
438 * and let clnt_reconnect_create handle reconnects.
440 if (nrp->nr_client == NULL)
441 newnfs_connect(nmp, nrp, cred, td, 0);
444 * For a client side mount, nmp is != NULL and clp == NULL. For
445 * server calls (callbacks or upcalls), nmp == NULL.
449 if ((clp->lc_flags & LCL_GSS) && nfsrv_gsscallbackson) {
450 secflavour = RPCSEC_GSS_KRB5;
451 if (nd->nd_procnum != NFSPROC_NULL) {
452 if (clp->lc_flags & LCL_GSSINTEGRITY)
453 secflavour = RPCSEC_GSS_KRB5I;
454 else if (clp->lc_flags & LCL_GSSPRIVACY)
455 secflavour = RPCSEC_GSS_KRB5P;
459 } else if (nmp != NULL && NFSHASKERB(nmp) &&
460 nd->nd_procnum != NFSPROC_NULL) {
461 if (NFSHASALLGSSNAME(nmp) && nmp->nm_krbnamelen > 0)
462 nd->nd_flag |= ND_USEGSSNAME;
463 if ((nd->nd_flag & ND_USEGSSNAME) != 0) {
465 * If there is a client side host based credential,
466 * use that, otherwise use the system uid, if set.
468 if (nmp->nm_krbnamelen > 0) {
470 } else if (nmp->nm_uid != (uid_t)-1) {
471 saved_uid = cred->cr_uid;
472 cred->cr_uid = nmp->nm_uid;
475 } else if (nmp->nm_krbnamelen == 0 &&
476 nmp->nm_uid != (uid_t)-1 && cred->cr_uid == (uid_t)0) {
478 * If there is no host based principal name and
479 * the system uid is set and this is root, use the
480 * system uid, since root won't have user
481 * credentials in a credentials cache file.
483 saved_uid = cred->cr_uid;
484 cred->cr_uid = nmp->nm_uid;
487 if (NFSHASINTEGRITY(nmp))
488 secflavour = RPCSEC_GSS_KRB5I;
489 else if (NFSHASPRIVACY(nmp))
490 secflavour = RPCSEC_GSS_KRB5P;
492 secflavour = RPCSEC_GSS_KRB5;
493 srv_principal = NFSMNT_SRVKRBNAME(nmp);
497 bzero(&nf, sizeof(struct nfs_feedback_arg));
500 getmicrouptime(&now);
501 nf.nf_lastmsg = now.tv_sec -
502 ((nmp->nm_tprintf_delay)-(nmp->nm_tprintf_initial_delay));
505 if (nd->nd_procnum == NFSPROC_NULL)
506 auth = authnone_create();
508 auth = nfs_getauth(nrp, secflavour, nmp->nm_krbname,
509 srv_principal, NULL, cred);
511 auth = nfs_getauth(nrp, secflavour, NULL,
512 srv_principal, NULL, cred);
514 cred->cr_uid = saved_uid;
516 m_freem(nd->nd_mreq);
518 newnfs_restore_sigmask(td, &oldset);
521 bzero(&ext, sizeof(ext));
524 ext.rc_feedback = nfs_feedback;
525 ext.rc_feedback_arg = &nf;
528 procnum = nd->nd_procnum;
529 if ((nd->nd_flag & ND_NFSV4) &&
530 nd->nd_procnum != NFSPROC_NULL &&
531 nd->nd_procnum != NFSV4PROC_CBCOMPOUND)
532 procnum = NFSV4PROC_COMPOUND;
535 NFSINCRGLOBAL(newnfsstats.rpcrequests);
537 * Now only used for the R_DONTRECOVER case, but until that is
538 * supported within the krpc code, I need to keep a queue of
539 * outstanding RPCs for nfsv4 client requests.
541 if ((nd->nd_flag & ND_NFSV4) && procnum == NFSV4PROC_COMPOUND)
542 MALLOC(rep, struct nfsreq *, sizeof(struct nfsreq),
543 M_NFSDREQ, M_WAITOK);
550 timo.tv_sec = NFSV4_UPCALLTIMEO;
552 timo.tv_sec = NFSV4_CALLBACKTIMEO;
554 if (nrp->nr_sotype != SOCK_DGRAM) {
556 if ((nmp->nm_flag & NFSMNT_NFSV4))
557 timo.tv_sec = INT_MAX;
559 timo.tv_sec = NFS_TCPTIMEO;
561 timo.tv_sec = nmp->nm_timeo / NFS_HZ;
562 timo.tv_usec = (nmp->nm_timeo * 1000000) / NFS_HZ;
569 * Chain request into list of outstanding requests.
572 TAILQ_INSERT_TAIL(&nfsd_reqq, rep, r_chain);
578 stat = CLNT_CALL_MBUF(nrp->nr_client, &ext, procnum, nd->nd_mreq,
583 * RPC done, unlink the request.
586 TAILQ_REMOVE(&nfsd_reqq, rep, r_chain);
591 * If there was a successful reply and a tprintf msg.
592 * tprintf a response.
594 if (stat == RPC_SUCCESS) {
596 } else if (stat == RPC_TIMEDOUT) {
598 } else if (stat == RPC_VERSMISMATCH) {
600 } else if (stat == RPC_PROGVERSMISMATCH) {
601 error = EPROTONOSUPPORT;
606 m_freem(nd->nd_mreq);
609 FREE((caddr_t)rep, M_NFSDREQ);
611 newnfs_restore_sigmask(td, &oldset);
615 KASSERT(nd->nd_mrep != NULL, ("mrep shouldn't be NULL if no error\n"));
618 * Search for any mbufs that are not a multiple of 4 bytes long
619 * or with m_data not longword aligned.
620 * These could cause pointer alignment problems, so copy them to
621 * well aligned mbufs.
623 newnfs_realign(&nd->nd_mrep);
624 nd->nd_md = nd->nd_mrep;
625 nd->nd_dpos = NFSMTOD(nd->nd_md, caddr_t);
627 if (nd->nd_procnum != NFSPROC_NULL) {
629 * and now the actual NFS xdr.
631 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
632 nd->nd_repstat = fxdr_unsigned(u_int32_t, *tl);
633 if (nd->nd_repstat != 0) {
634 if ((nd->nd_repstat == NFSERR_DELAY &&
635 (nd->nd_flag & ND_NFSV4) &&
636 nd->nd_procnum != NFSPROC_SETATTR &&
637 nd->nd_procnum != NFSPROC_READ &&
638 nd->nd_procnum != NFSPROC_WRITE &&
639 nd->nd_procnum != NFSPROC_OPEN &&
640 nd->nd_procnum != NFSPROC_CREATE &&
641 nd->nd_procnum != NFSPROC_OPENCONFIRM &&
642 nd->nd_procnum != NFSPROC_OPENDOWNGRADE &&
643 nd->nd_procnum != NFSPROC_CLOSE &&
644 nd->nd_procnum != NFSPROC_LOCK &&
645 nd->nd_procnum != NFSPROC_LOCKU) ||
646 (nd->nd_repstat == NFSERR_DELAY &&
647 (nd->nd_flag & ND_NFSV4) == 0) ||
648 nd->nd_repstat == NFSERR_RESOURCE) {
649 if (trylater_delay > NFS_TRYLATERDEL)
650 trylater_delay = NFS_TRYLATERDEL;
651 waituntil = NFSD_MONOSEC + trylater_delay;
652 while (NFSD_MONOSEC < waituntil)
653 (void) nfs_catnap(PZERO, "nfstry");
659 * If the File Handle was stale, invalidate the
660 * lookup cache, just in case.
661 * (vp != NULL implies a client side call)
663 if (nd->nd_repstat == ESTALE && vp != NULL) {
665 if (ncl_call_invalcaches != NULL)
666 (*ncl_call_invalcaches)(vp);
671 * Get rid of the tag, return count, and PUTFH result for V4.
673 if (nd->nd_flag & ND_NFSV4) {
674 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
675 i = fxdr_unsigned(int, *tl);
676 error = nfsm_advance(nd, NFSM_RNDUP(i), -1);
679 NFSM_DISSECT(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
680 i = fxdr_unsigned(int, *++tl);
683 * If the first op's status is non-zero, mark that
684 * there is no more data to process.
687 nd->nd_flag |= ND_NOMOREDATA;
690 * If the first op is Putfh, throw its results away
691 * and toss the op# and status for the first op.
693 if (nmp != NULL && i == NFSV4OP_PUTFH && *tl == 0) {
694 NFSM_DISSECT(tl,u_int32_t *,2 * NFSX_UNSIGNED);
695 i = fxdr_unsigned(int, *tl++);
696 j = fxdr_unsigned(int, *tl);
698 * All Compounds that do an Op that must
699 * be in sequence consist of NFSV4OP_PUTFH
700 * followed by one of these. As such, we
701 * can determine if the seqid# should be
704 if ((i == NFSV4OP_OPEN ||
705 i == NFSV4OP_OPENCONFIRM ||
706 i == NFSV4OP_OPENDOWNGRADE ||
707 i == NFSV4OP_CLOSE ||
709 i == NFSV4OP_LOCKU) &&
711 (j != NFSERR_STALECLIENTID &&
712 j != NFSERR_STALESTATEID &&
713 j != NFSERR_BADSTATEID &&
714 j != NFSERR_BADSEQID &&
715 j != NFSERR_BADXDR &&
716 j != NFSERR_RESOURCE &&
717 j != NFSERR_NOFILEHANDLE)))
718 nd->nd_flag |= ND_INCRSEQID;
720 * If the first op's status is non-zero, mark
721 * that there is no more data to process.
724 nd->nd_flag |= ND_NOMOREDATA;
728 * If R_DONTRECOVER is set, replace the stale error
729 * reply, so that recovery isn't initiated.
731 if ((nd->nd_repstat == NFSERR_STALECLIENTID ||
732 nd->nd_repstat == NFSERR_STALESTATEID) &&
733 rep != NULL && (rep->r_flags & R_DONTRECOVER))
734 nd->nd_repstat = NFSERR_STALEDONTRECOVER;
738 m_freem(nd->nd_mreq);
741 FREE((caddr_t)rep, M_NFSDREQ);
743 newnfs_restore_sigmask(td, &oldset);
746 mbuf_freem(nd->nd_mrep);
747 mbuf_freem(nd->nd_mreq);
750 FREE((caddr_t)rep, M_NFSDREQ);
752 newnfs_restore_sigmask(td, &oldset);
757 * Mark all of an nfs mount's outstanding requests with R_SOFTTERM and
758 * wait for all requests to complete. This is used by forced unmounts
759 * to terminate any outstanding RPCs.
762 newnfs_nmcancelreqs(struct nfsmount *nmp)
765 if (nmp->nm_sockreq.nr_client != NULL)
766 CLNT_CLOSE(nmp->nm_sockreq.nr_client);
771 * Any signal that can interrupt an NFS operation in an intr mount
772 * should be added to this set. SIGSTOP and SIGKILL cannot be masked.
774 int newnfs_sig_set[] = {
784 * Check to see if one of the signals in our subset is pending on
785 * the process (in an intr mount).
788 nfs_sig_pending(sigset_t set)
792 for (i = 0 ; i < sizeof(newnfs_sig_set)/sizeof(int) ; i++)
793 if (SIGISMEMBER(set, newnfs_sig_set[i]))
799 * The set/restore sigmask functions are used to (temporarily) overwrite
800 * the process p_sigmask during an RPC call (for example). These are also
801 * used in other places in the NFS client that might tsleep().
804 newnfs_set_sigmask(struct thread *td, sigset_t *oldset)
812 td = curthread; /* XXX */
814 /* Remove the NFS set of signals from newset */
816 mtx_lock(&p->p_sigacts->ps_mtx);
817 for (i = 0 ; i < sizeof(newnfs_sig_set)/sizeof(int) ; i++) {
819 * But make sure we leave the ones already masked
820 * by the process, ie. remove the signal from the
821 * temporary signalmask only if it wasn't already
824 if (!SIGISMEMBER(td->td_sigmask, newnfs_sig_set[i]) &&
825 !SIGISMEMBER(p->p_sigacts->ps_sigignore, newnfs_sig_set[i]))
826 SIGDELSET(newset, newnfs_sig_set[i]);
828 mtx_unlock(&p->p_sigacts->ps_mtx);
830 kern_sigprocmask(td, SIG_SETMASK, &newset, oldset, 0);
834 newnfs_restore_sigmask(struct thread *td, sigset_t *set)
837 td = curthread; /* XXX */
838 kern_sigprocmask(td, SIG_SETMASK, set, NULL, 0);
842 * NFS wrapper to msleep(), that shoves a new p_sigmask and restores the
843 * old one after msleep() returns.
846 newnfs_msleep(struct thread *td, void *ident, struct mtx *mtx, int priority, char *wmesg, int timo)
852 if ((priority & PCATCH) == 0)
853 return msleep(ident, mtx, priority, wmesg, timo);
855 td = curthread; /* XXX */
856 newnfs_set_sigmask(td, &oldset);
857 error = msleep(ident, mtx, priority, wmesg, timo);
858 newnfs_restore_sigmask(td, &oldset);
864 * Test for a termination condition pending on the process.
865 * This is used for NFSMNT_INT mounts.
868 newnfs_sigintr(struct nfsmount *nmp, struct thread *td)
873 /* Terminate all requests while attempting a forced unmount. */
874 if (nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF)
876 if (!(nmp->nm_flag & NFSMNT_INT))
882 tmpset = p->p_siglist;
883 SIGSETOR(tmpset, td->td_siglist);
884 SIGSETNAND(tmpset, td->td_sigmask);
885 mtx_lock(&p->p_sigacts->ps_mtx);
886 SIGSETNAND(tmpset, p->p_sigacts->ps_sigignore);
887 mtx_unlock(&p->p_sigacts->ps_mtx);
888 if ((SIGNOTEMPTY(p->p_siglist) || SIGNOTEMPTY(td->td_siglist))
889 && nfs_sig_pending(tmpset)) {
898 nfs_msg(struct thread *td, const char *server, const char *msg, int error)
902 p = td ? td->td_proc : NULL;
904 tprintf(p, LOG_INFO, "newnfs server %s: %s, error %d\n",
907 tprintf(p, LOG_INFO, "newnfs server %s: %s\n", server, msg);
913 nfs_down(struct nfsmount *nmp, struct thread *td, const char *msg,
914 int error, int flags)
918 mtx_lock(&nmp->nm_mtx);
919 if ((flags & NFSSTA_TIMEO) && !(nmp->nm_state & NFSSTA_TIMEO)) {
920 nmp->nm_state |= NFSSTA_TIMEO;
921 mtx_unlock(&nmp->nm_mtx);
922 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid,
925 mtx_unlock(&nmp->nm_mtx);
926 mtx_lock(&nmp->nm_mtx);
927 if ((flags & NFSSTA_LOCKTIMEO) && !(nmp->nm_state & NFSSTA_LOCKTIMEO)) {
928 nmp->nm_state |= NFSSTA_LOCKTIMEO;
929 mtx_unlock(&nmp->nm_mtx);
930 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid,
933 mtx_unlock(&nmp->nm_mtx);
934 nfs_msg(td, nmp->nm_mountp->mnt_stat.f_mntfromname, msg, error);
938 nfs_up(struct nfsmount *nmp, struct thread *td, const char *msg,
939 int flags, int tprintfmsg)
944 nfs_msg(td, nmp->nm_mountp->mnt_stat.f_mntfromname, msg, 0);
947 mtx_lock(&nmp->nm_mtx);
948 if ((flags & NFSSTA_TIMEO) && (nmp->nm_state & NFSSTA_TIMEO)) {
949 nmp->nm_state &= ~NFSSTA_TIMEO;
950 mtx_unlock(&nmp->nm_mtx);
951 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid,
954 mtx_unlock(&nmp->nm_mtx);
956 mtx_lock(&nmp->nm_mtx);
957 if ((flags & NFSSTA_LOCKTIMEO) && (nmp->nm_state & NFSSTA_LOCKTIMEO)) {
958 nmp->nm_state &= ~NFSSTA_LOCKTIMEO;
959 mtx_unlock(&nmp->nm_mtx);
960 vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid,
963 mtx_unlock(&nmp->nm_mtx);