2 * Copyright (c) 1989, 1993
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 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * @(#)nfs_syscalls.c 8.5 (Berkeley) 3/30/95
37 * $FreeBSD: src/sys/nfs/nfs_syscalls.c,v 1.58.2.1 2000/11/26 02:30:06 dillon Exp $
38 * $DragonFly: src/sys/vfs/nfs/nfs_syscalls.c,v 1.31 2008/01/05 14:02:41 swildner Exp $
41 #include <sys/param.h>
42 #include <sys/systm.h>
43 #include <sys/sysproto.h>
44 #include <sys/kernel.h>
45 #include <sys/sysctl.h>
47 #include <sys/filedesc.h>
48 #include <sys/vnode.h>
49 #include <sys/malloc.h>
50 #include <sys/mount.h>
55 #include <sys/resourcevar.h>
56 #include <sys/socket.h>
57 #include <sys/socketvar.h>
58 #include <sys/domain.h>
59 #include <sys/protosw.h>
60 #include <sys/nlookup.h>
62 #include <sys/mutex2.h>
63 #include <sys/thread2.h>
65 #include <netinet/in.h>
66 #include <netinet/tcp.h>
71 #include "nfsm_subs.h"
72 #include "nfsrvcache.h"
77 #include <sys/thread2.h>
79 static MALLOC_DEFINE(M_NFSSVC, "NFS srvsock", "Nfs server structure");
81 static int nuidhash_max = NFS_MAXUIDHASH;
84 static void nfsrv_zapsock (struct nfssvc_sock *slp);
90 SYSCTL_DECL(_vfs_nfs);
94 static struct nfsdrt nfsdrt;
95 static int nfs_numnfsd = 0;
96 static void nfsd_rt (int sotype, struct nfsrv_descript *nd,
98 static int nfssvc_addsock (struct file *, struct sockaddr *,
100 static int nfssvc_nfsd (struct nfsd_srvargs *,caddr_t,struct thread *);
102 static int nfs_privport = 0;
103 SYSCTL_INT(_vfs_nfs, NFS_NFSPRIVPORT, nfs_privport, CTLFLAG_RW, &nfs_privport,
104 0, "Enable privileged source port checks");
105 SYSCTL_INT(_vfs_nfs, OID_AUTO, gatherdelay, CTLFLAG_RW, &nfsrvw_procrastinate, 0,
106 "Enable NFS request procrastination");
107 SYSCTL_INT(_vfs_nfs, OID_AUTO, gatherdelay_v3, CTLFLAG_RW, &nfsrvw_procrastinate_v3, 0,
108 "Enable NFSv3 request procrastination");
109 int nfs_soreserve = NFS_MAXPACKET * NFS_MAXASYNCBIO;
110 SYSCTL_INT(_vfs_nfs, OID_AUTO, soreserve, CTLFLAG_RW, &nfs_soreserve, 0,
111 "Minimum NFS socket buffer size reservation");
114 * NFS server system calls
117 #endif /* NFS_NOSERVER */
119 * nfssvc_args(int flag, caddr_t argp)
121 * Nfs server psuedo system call for the nfsd's
122 * Based on the flag value it either:
123 * - adds a socket to the selection list
124 * - remains in the kernel as an nfsd
125 * - remains in the kernel as an nfsiod
130 sys_nfssvc(struct nfssvc_args *uap)
133 struct nlookupdata nd;
135 struct sockaddr *nam;
136 struct nfsd_args nfsdarg;
137 struct nfsd_srvargs nfsd_srvargs, *nsd = &nfsd_srvargs;
138 struct nfsd_cargs ncd;
140 struct nfssvc_sock *slp;
141 struct nfsuid *nuidp;
142 struct nfsmount *nmp;
144 #endif /* NFS_NOSERVER */
146 struct thread *td = curthread;
151 error = priv_check(td, PRIV_ROOT);
155 lwkt_gettoken(&nfs_token);
157 while (nfssvc_sockhead_flag & SLP_INIT) {
158 nfssvc_sockhead_flag |= SLP_WANTINIT;
159 tsleep((caddr_t)&nfssvc_sockhead, 0, "nfsd init", 0);
161 if (uap->flag & NFSSVC_BIOD)
162 error = ENXIO; /* no longer need nfsiod's */
166 #else /* !NFS_NOSERVER */
167 else if (uap->flag & NFSSVC_MNTD) {
168 error = copyin(uap->argp, (caddr_t)&ncd, sizeof (ncd));
172 error = nlookup_init(&nd, ncd.ncd_dirp, UIO_USERSPACE,
175 error = nlookup(&nd);
177 error = cache_vget(&nd.nl_nch, nd.nl_cred, LK_EXCLUSIVE, &vp);
182 if ((vp->v_flag & VROOT) == 0)
184 nmp = VFSTONFS(vp->v_mount);
188 if ((nmp->nm_state & NFSSTA_MNTD) &&
189 (uap->flag & NFSSVC_GOTAUTH) == 0) {
193 nmp->nm_state |= NFSSTA_MNTD;
194 error = nfs_clientd(nmp, td->td_ucred, &ncd, uap->flag,
196 } else if (uap->flag & NFSSVC_ADDSOCK) {
197 error = copyin(uap->argp, (caddr_t)&nfsdarg, sizeof(nfsdarg));
200 error = holdsock(td->td_proc->p_fd, nfsdarg.sock, &fp);
204 * Get the client address for connected sockets.
206 if (nfsdarg.name == NULL || nfsdarg.namelen == 0)
209 error = getsockaddr(&nam, nfsdarg.name,
216 error = nfssvc_addsock(fp, nam, td);
219 error = copyin(uap->argp, (caddr_t)nsd, sizeof (*nsd));
222 if ((uap->flag & NFSSVC_AUTHIN) &&
223 ((nfsd = nsd->nsd_nfsd)) != NULL &&
224 (nfsd->nfsd_slp->ns_flag & SLP_VALID)) {
225 slp = nfsd->nfsd_slp;
228 * First check to see if another nfsd has already
229 * added this credential.
231 for (nuidp = NUIDHASH(slp,nsd->nsd_cr.cr_uid)->lh_first;
232 nuidp != 0; nuidp = nuidp->nu_hash.le_next) {
233 if (nuidp->nu_cr.cr_uid == nsd->nsd_cr.cr_uid &&
234 (!nfsd->nfsd_nd->nd_nam2 ||
235 netaddr_match(NU_NETFAM(nuidp),
236 &nuidp->nu_haddr, nfsd->nfsd_nd->nd_nam2)))
240 nfsrv_setcred(&nuidp->nu_cr,&nfsd->nfsd_nd->nd_cr);
241 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL;
246 if (slp->ns_numuids < nuidhash_max) {
248 nuidp = (struct nfsuid *)
249 kmalloc(sizeof (struct nfsuid), M_NFSUID,
253 if ((slp->ns_flag & SLP_VALID) == 0) {
255 kfree((caddr_t)nuidp, M_NFSUID);
258 nuidp = TAILQ_FIRST(&slp->ns_uidlruhead);
259 LIST_REMOVE(nuidp, nu_hash);
260 TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp,
262 if (nuidp->nu_flag & NU_NAM)
263 FREE(nuidp->nu_nam, M_SONAME);
266 nuidp->nu_cr = nsd->nsd_cr;
267 if (nuidp->nu_cr.cr_ngroups > NGROUPS)
268 nuidp->nu_cr.cr_ngroups = NGROUPS;
269 nuidp->nu_cr.cr_ref = 1;
270 nuidp->nu_timestamp = nsd->nsd_timestamp;
271 nuidp->nu_expire = time_second + nsd->nsd_ttl;
273 * and save the session key in nu_key.
275 bcopy(nsd->nsd_key, nuidp->nu_key,
276 sizeof (nsd->nsd_key));
277 if (nfsd->nfsd_nd->nd_nam2) {
278 struct sockaddr_in *saddr;
280 saddr = (struct sockaddr_in *)
281 nfsd->nfsd_nd->nd_nam2;
282 switch (saddr->sin_family) {
284 nuidp->nu_flag |= NU_INETADDR;
286 saddr->sin_addr.s_addr;
290 nuidp->nu_flag |= NU_NAM;
292 dup_sockaddr(nfsd->nfsd_nd->nd_nam2);
296 TAILQ_INSERT_TAIL(&slp->ns_uidlruhead, nuidp,
298 LIST_INSERT_HEAD(NUIDHASH(slp, nsd->nsd_uid),
300 nfsrv_setcred(&nuidp->nu_cr,
301 &nfsd->nfsd_nd->nd_cr);
302 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL;
306 if ((uap->flag & NFSSVC_AUTHINFAIL) && (nfsd = nsd->nsd_nfsd))
307 nfsd->nfsd_flag |= NFSD_AUTHFAIL;
308 error = nfssvc_nfsd(nsd, uap->argp, td);
310 #endif /* NFS_NOSERVER */
311 if (error == EINTR || error == ERESTART)
314 lwkt_reltoken(&nfs_token);
320 * Adds a socket to the list for servicing by nfsds.
323 nfssvc_addsock(struct file *fp, struct sockaddr *mynam, struct thread *td)
326 struct nfssvc_sock *slp;
330 so = (struct socket *)fp->f_data;
334 * Add it to the list, as required.
336 if (so->so_proto->pr_protocol == IPPROTO_UDP) {
338 if (tslp->ns_flag & SLP_VALID) {
340 FREE(mynam, M_SONAME);
346 * Reserve buffer space in the socket. Note that due to bugs in
347 * Linux's delayed-ack code, serious performance degredation may
348 * occur with linux hosts if the minimum is used.
350 * NFS sockets are not limited to the standard sb_max or by
353 if (so->so_type == SOCK_STREAM)
354 siz = NFS_MAXPACKET + sizeof (u_long);
357 if (siz < nfs_soreserve)
360 error = soreserve(so, siz, siz, NULL);
363 FREE(mynam, M_SONAME);
368 * Set protocol specific options { for now TCP only } and
369 * reserve some space. For datagram sockets, this can get called
370 * repeatedly for the same socket, but that isn't harmful.
372 if (so->so_type == SOCK_STREAM) {
376 bzero(&sopt, sizeof sopt);
377 sopt.sopt_level = SOL_SOCKET;
378 sopt.sopt_name = SO_KEEPALIVE;
379 sopt.sopt_val = &val;
380 sopt.sopt_valsize = sizeof val;
384 if (so->so_proto->pr_domain->dom_family == AF_INET &&
385 so->so_proto->pr_protocol == IPPROTO_TCP) {
389 bzero(&sopt, sizeof sopt);
390 sopt.sopt_level = IPPROTO_TCP;
391 sopt.sopt_name = TCP_NODELAY;
392 sopt.sopt_val = &val;
393 sopt.sopt_valsize = sizeof val;
397 bzero(&sopt, sizeof sopt);
398 sopt.sopt_level = IPPROTO_TCP;
399 sopt.sopt_name = TCP_FASTKEEP;
400 sopt.sopt_val = &val;
401 sopt.sopt_valsize = sizeof val;
405 atomic_clear_int(&so->so_rcv.ssb_flags, SSB_NOINTR);
406 so->so_rcv.ssb_timeo = 0;
407 atomic_clear_int(&so->so_snd.ssb_flags, SSB_NOINTR);
408 so->so_snd.ssb_timeo = 0;
410 slp = kmalloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK | M_ZERO);
411 mtx_init(&slp->ns_solock);
412 STAILQ_INIT(&slp->ns_rec);
413 TAILQ_INIT(&slp->ns_uidlruhead);
414 lwkt_token_init(&slp->ns_token, "nfssrv_token");
416 lwkt_gettoken(&nfs_token);
418 TAILQ_INSERT_TAIL(&nfssvc_sockhead, slp, ns_chain);
419 lwkt_gettoken(&slp->ns_token);
426 so->so_upcallarg = (caddr_t)slp;
427 so->so_upcall = nfsrv_rcv_upcall;
428 atomic_set_int(&so->so_rcv.ssb_flags, SSB_UPCALL);
429 slp->ns_flag = (SLP_VALID | SLP_NEEDQ);
430 nfsrv_wakenfsd(slp, 1);
432 lwkt_reltoken(&slp->ns_token);
433 lwkt_reltoken(&nfs_token);
439 * Called by nfssvc() for nfsds. Just loops around servicing rpc requests
440 * until it is killed by a signal.
443 nfssvc_nfsd(struct nfsd_srvargs *nsd, caddr_t argp, struct thread *td)
446 struct nfssvc_sock *slp;
447 struct nfsd *nfsd = nsd->nsd_nfsd;
448 struct nfsrv_descript *nd = NULL;
449 struct mbuf *m, *mreq;
450 int error, cacherep, sotype, writes_todo;
458 lwkt_gettoken(&nfs_token);
461 nsd->nsd_nfsd = nfsd = (struct nfsd *)
462 kmalloc(sizeof (struct nfsd), M_NFSD, M_WAITOK|M_ZERO);
464 TAILQ_INSERT_TAIL(&nfsd_head, nfsd, nfsd_chain);
469 * Loop getting rpc requests until SIGKILL.
472 if ((nfsd->nfsd_flag & NFSD_REQINPROG) == 0) {
473 while (nfsd->nfsd_slp == NULL &&
474 (nfsd_head_flag & NFSD_CHECKSLP) == 0) {
475 nfsd->nfsd_flag |= NFSD_WAITING;
477 error = tsleep(nfsd, PCATCH, "nfsd", 0);
479 if (error && nfsd->nfsd_slp == NULL)
482 if (nfsd->nfsd_slp == NULL &&
483 (nfsd_head_flag & NFSD_CHECKSLP)) {
484 TAILQ_FOREACH(slp, &nfssvc_sockhead, ns_chain) {
485 if ((slp->ns_flag & SLP_ACTION_MASK) ||
486 slp->ns_needq_upcall) {
488 nfsd->nfsd_slp = slp;
493 nfsd_head_flag &= ~NFSD_CHECKSLP;
495 if ((slp = nfsd->nfsd_slp) == NULL)
498 lwkt_reltoken(&nfs_token);
499 lwkt_gettoken(&slp->ns_token);
501 if (slp->ns_needq_upcall) {
502 slp->ns_needq_upcall = 0;
503 slp->ns_flag |= SLP_NEEDQ;
506 if (slp->ns_flag & SLP_VALID) {
508 * We can both process additional received
509 * data into new records and process existing
510 * records. This keeps the pipeline hot by
511 * allowing the tcp socket to continue to
512 * drain while we are processing records.
514 if (slp->ns_flag & SLP_DISCONN) {
516 } else if (slp->ns_flag & SLP_NEEDQ) {
517 (void)nfs_slplock(slp, 1);
518 nfsrv_rcv(slp->ns_so, (caddr_t)slp,
522 error = nfsrv_dorec(slp, nfsd, &nd);
523 cur_usec = nfs_curusec();
524 if (error && slp->ns_tq.lh_first &&
525 slp->ns_tq.lh_first->nd_time <= cur_usec) {
532 nfsd->nfsd_flag |= NFSD_REQINPROG;
534 slp->ns_flag &= ~SLP_ACTION_MASK;
539 slp = nfsd->nfsd_slp;
541 lwkt_reltoken(&nfs_token);
542 lwkt_gettoken(&slp->ns_token);
544 if (slp->ns_needq_upcall) {
545 slp->ns_needq_upcall = 0;
546 slp->ns_flag |= SLP_NEEDQ;
548 if (NFSRV_RECLIMIT(slp) == 0 &&
549 (slp->ns_flag & SLP_NEEDQ)) {
550 (void)nfs_slplock(slp, 1);
551 nfsrv_rcv(slp->ns_so, (caddr_t)slp,
558 * nfs_token not held here. slp token is held.
560 if (error || (slp->ns_flag & SLP_VALID) == 0) {
562 kfree((caddr_t)nd, M_NFSRVDESC);
565 nfsd->nfsd_flag &= ~NFSD_REQINPROG;
566 if (slp->ns_flag & SLP_ACTION_MASK) {
567 lwkt_reltoken(&slp->ns_token);
568 lwkt_gettoken(&nfs_token);
570 nfsd->nfsd_slp = NULL;
571 lwkt_reltoken(&slp->ns_token);
572 lwkt_gettoken(&nfs_token);
579 * Execute the NFS request - handle the server side cache
581 * nfs_token not held here. slp token is held.
583 sotype = slp->ns_so->so_type;
585 getmicrotime(&nd->nd_starttime);
587 nd->nd_nam = nd->nd_nam2;
589 nd->nd_nam = slp->ns_nam;
592 * Check to see if authorization is needed.
594 if (nfsd->nfsd_flag & NFSD_NEEDAUTH) {
595 nfsd->nfsd_flag &= ~NFSD_NEEDAUTH;
597 ((struct sockaddr_in *)
598 nd->nd_nam)->sin_addr.s_addr;
599 nsd->nsd_authlen = nfsd->nfsd_authlen;
600 nsd->nsd_verflen = nfsd->nfsd_verflen;
601 if (!copyout(nfsd->nfsd_authstr,nsd->nsd_authstr,
602 nfsd->nfsd_authlen) &&
603 !copyout(nfsd->nfsd_verfstr, nsd->nsd_verfstr,
604 nfsd->nfsd_verflen) &&
605 !copyout((caddr_t)nsd, argp, sizeof (*nsd)))
606 lwkt_reltoken(&slp->ns_token);
608 cacherep = RC_DROPIT;
610 cacherep = nfsrv_getcache(nd, slp, &mreq);
613 if (nfsd->nfsd_flag & NFSD_AUTHFAIL) {
614 nfsd->nfsd_flag &= ~NFSD_AUTHFAIL;
615 nd->nd_procnum = NFSPROC_NOOP;
616 nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
618 } else if (nfs_privport) {
619 /* Check if source port is privileged */
621 struct sockaddr *nam = nd->nd_nam;
622 struct sockaddr_in *sin;
624 sin = (struct sockaddr_in *)nam;
625 port = ntohs(sin->sin_port);
626 if (port >= IPPORT_RESERVED &&
627 nd->nd_procnum != NFSPROC_NULL) {
628 nd->nd_procnum = NFSPROC_NOOP;
629 nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
631 kprintf("NFS request from unprivileged port (%s:%d)\n",
632 inet_ntoa(sin->sin_addr), port);
639 * Execute the NFS request - direct execution
641 * Loop to get all the write rpc replies that have been
644 * nfs_token not held here. slp token is held.
649 if (nd && (nd->nd_flag & ND_NFSV3))
650 procrastinate = nfsrvw_procrastinate_v3;
652 procrastinate = nfsrvw_procrastinate;
653 if (writes_todo || (nd->nd_procnum == NFSPROC_WRITE &&
656 error = nfsrv_writegather(&nd, slp,
657 nfsd->nfsd_td, &mreq);
659 /* NOT YET lwkt_reltoken(&slp->ns_token); */
660 error = (*(nfsrv3_procs[nd->nd_procnum]))(nd,
661 slp, nfsd->nfsd_td, &mreq);
662 /* NOT YET lwkt_gettoken(&slp->ns_token); */
666 if (error != 0 && error != NFSERR_RETVOID) {
667 if (nd->nd_procnum != NQNFSPROC_VACATED)
669 nfsrv_updatecache(nd, FALSE, mreq);
671 FREE(nd->nd_nam2, M_SONAME);
674 nfsstats.srvrpccnt[nd->nd_procnum]++;
675 nfsrv_updatecache(nd, TRUE, mreq);
685 if (siz <= 0 || siz > NFS_MAXPACKET) {
686 kprintf("mbuf siz=%d\n",siz);
687 panic("Bad nfs svc reply");
690 m->m_pkthdr.len = siz;
691 m->m_pkthdr.rcvif = NULL;
693 * For stream protocols, prepend a Sun RPC
696 if (sotype == SOCK_STREAM) {
697 M_PREPEND(m, NFSX_UNSIGNED, MB_WAIT);
702 *mtod(m, u_int32_t *) = htonl(0x80000000 | siz);
704 if (slp->ns_so->so_proto->pr_flags & PR_CONNREQUIRED)
705 (void) nfs_slplock(slp, 1);
706 if (slp->ns_flag & SLP_VALID)
707 error = nfs_send(slp->ns_so, nd->nd_nam2, m, NULL);
714 nfsd_rt(sotype, nd, cacherep);
716 FREE(nd->nd_nam2, M_SONAME);
718 m_freem(nd->nd_mrep);
719 if (error == EPIPE || error == ENOBUFS)
721 if (slp->ns_so->so_proto->pr_flags & PR_CONNREQUIRED)
723 if (error == EINTR || error == ERESTART) {
724 kfree((caddr_t)nd, M_NFSRVDESC);
725 lwkt_reltoken(&slp->ns_token);
726 lwkt_gettoken(&nfs_token);
727 nfsd->nfsd_slp = NULL;
734 nfsd_rt(sotype, nd, cacherep);
735 m_freem(nd->nd_mrep);
737 FREE(nd->nd_nam2, M_SONAME);
741 FREE((caddr_t)nd, M_NFSRVDESC);
746 * Check to see if there are outstanding writes that
747 * need to be serviced.
749 cur_usec = nfs_curusec();
750 if (slp->ns_tq.lh_first &&
751 slp->ns_tq.lh_first->nd_time <= cur_usec) {
757 } while (writes_todo);
760 * nfs_token not held here. slp token is held.
762 if (nfsrv_dorec(slp, nfsd, &nd)) {
763 nfsd->nfsd_flag &= ~NFSD_REQINPROG;
764 if (slp->ns_flag & SLP_ACTION_MASK) {
765 lwkt_reltoken(&slp->ns_token);
766 lwkt_gettoken(&nfs_token);
768 nfsd->nfsd_slp = NULL;
769 lwkt_reltoken(&slp->ns_token);
770 lwkt_gettoken(&nfs_token);
774 lwkt_reltoken(&slp->ns_token);
775 lwkt_gettoken(&nfs_token);
779 TAILQ_REMOVE(&nfsd_head, nfsd, nfsd_chain);
780 kfree((caddr_t)nfsd, M_NFSD);
781 nsd->nsd_nfsd = NULL;
782 if (--nfs_numnfsd == 0)
783 nfsrv_init(TRUE); /* Reinitialize everything */
785 lwkt_reltoken(&nfs_token);
790 * Shut down a socket associated with an nfssvc_sock structure.
791 * Should be called with the send lock set, if required.
792 * The trick here is to increment the sref at the start, so that the nfsds
793 * will stop using it and clear ns_flag at the end so that it will not be
794 * reassigned during cleanup.
797 nfsrv_zapsock(struct nfssvc_sock *slp)
799 struct nfsuid *nuidp, *nnuidp;
800 struct nfsrv_descript *nwp, *nnwp;
803 struct nfsrv_rec *rec;
805 slp->ns_flag &= ~SLP_ALLFLAGS;
810 atomic_clear_int(&so->so_rcv.ssb_flags, SSB_UPCALL);
811 so->so_upcall = NULL;
812 so->so_upcallarg = NULL;
813 soshutdown(so, SHUT_RDWR);
816 FREE(slp->ns_nam, M_SONAME);
817 m_freem(slp->ns_raw);
818 while ((rec = STAILQ_FIRST(&slp->ns_rec)) != NULL) {
820 STAILQ_REMOVE_HEAD(&slp->ns_rec, nr_link);
822 FREE(rec->nr_address, M_SONAME);
823 m_freem(rec->nr_packet);
824 kfree(rec, M_NFSRVDESC);
826 KKASSERT(slp->ns_numrec == 0);
828 TAILQ_FOREACH_MUTABLE(nuidp, &slp->ns_uidlruhead, nu_lru,
830 LIST_REMOVE(nuidp, nu_hash);
831 TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, nu_lru);
832 if (nuidp->nu_flag & NU_NAM)
833 FREE(nuidp->nu_nam, M_SONAME);
834 kfree((caddr_t)nuidp, M_NFSUID);
837 for (nwp = slp->ns_tq.lh_first; nwp; nwp = nnwp) {
838 nnwp = nwp->nd_tq.le_next;
839 LIST_REMOVE(nwp, nd_tq);
840 kfree((caddr_t)nwp, M_NFSRVDESC);
842 LIST_INIT(&slp->ns_tq);
849 * Derefence a server socket structure. If it has no more references and
850 * is no longer valid, you can throw it away.
852 * Must be holding nfs_token!
855 nfsrv_slpderef(struct nfssvc_sock *slp)
857 ASSERT_LWKT_TOKEN_HELD(&nfs_token);
858 if (slp->ns_sref == 1) {
859 KKASSERT((slp->ns_flag & SLP_VALID) == 0);
860 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain);
862 kfree((caddr_t)slp, M_NFSSVC);
869 nfsrv_slpref(struct nfssvc_sock *slp)
871 ASSERT_LWKT_TOKEN_HELD(&nfs_token);
876 * Lock a socket against others.
878 * Returns 0 on failure, 1 on success.
881 nfs_slplock(struct nfssvc_sock *slp, int wait)
883 mtx_t mtx = &slp->ns_solock;
886 mtx_lock_ex(mtx, "nfsslplck", 0, 0);
888 } else if (mtx_lock_ex_try(mtx) == 0) {
896 * Unlock the stream socket for others.
899 nfs_slpunlock(struct nfssvc_sock *slp)
901 mtx_t mtx = &slp->ns_solock;
907 * Initialize the data structures for the server.
908 * Handshake with any new nfsds starting up to avoid any chance of
912 nfsrv_init(int terminating)
914 struct nfssvc_sock *slp, *nslp;
916 lwkt_gettoken(&nfs_token);
917 if (nfssvc_sockhead_flag & SLP_INIT)
919 nfssvc_sockhead_flag |= SLP_INIT;
922 TAILQ_FOREACH_MUTABLE(slp, &nfssvc_sockhead, ns_chain, nslp) {
923 if (slp->ns_flag & SLP_VALID)
926 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain);
927 kfree((caddr_t)slp, M_NFSSVC);
930 nfsrv_cleancache(); /* And clear out server cache */
932 nfs_pub.np_valid = 0;
935 TAILQ_INIT(&nfssvc_sockhead);
936 nfssvc_sockhead_flag &= ~SLP_INIT;
937 if (nfssvc_sockhead_flag & SLP_WANTINIT) {
938 nfssvc_sockhead_flag &= ~SLP_WANTINIT;
939 wakeup((caddr_t)&nfssvc_sockhead);
942 TAILQ_INIT(&nfsd_head);
943 nfsd_head_flag &= ~NFSD_CHECKSLP;
945 lwkt_reltoken(&nfs_token);
948 nfs_udpsock = (struct nfssvc_sock *)
949 kmalloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK | M_ZERO);
950 mtx_init(&nfs_udpsock->ns_solock);
951 STAILQ_INIT(&nfs_udpsock->ns_rec);
952 TAILQ_INIT(&nfs_udpsock->ns_uidlruhead);
953 TAILQ_INSERT_HEAD(&nfssvc_sockhead, nfs_udpsock, ns_chain);
955 nfs_cltpsock = (struct nfssvc_sock *)
956 kmalloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK | M_ZERO);
957 mtx_init(&nfs_cltpsock->ns_solock);
958 STAILQ_INIT(&nfs_cltpsock->ns_rec);
959 TAILQ_INIT(&nfs_cltpsock->ns_uidlruhead);
960 TAILQ_INSERT_TAIL(&nfssvc_sockhead, nfs_cltpsock, ns_chain);
965 * Add entries to the server monitor log.
968 nfsd_rt(int sotype, struct nfsrv_descript *nd, int cacherep)
972 rt = &nfsdrt.drt[nfsdrt.pos];
973 if (cacherep == RC_DOIT)
975 else if (cacherep == RC_REPLY)
976 rt->flag = DRT_CACHEREPLY;
978 rt->flag = DRT_CACHEDROP;
979 if (sotype == SOCK_STREAM)
981 if (nd->nd_flag & ND_NFSV3)
982 rt->flag |= DRT_NFSV3;
983 rt->proc = nd->nd_procnum;
984 if (nd->nd_nam->sa_family == AF_INET)
985 rt->ipadr = ((struct sockaddr_in *)nd->nd_nam)->sin_addr.s_addr;
987 rt->ipadr = INADDR_ANY;
988 rt->resptime = nfs_curusec() - (nd->nd_starttime.tv_sec * 1000000 + nd->nd_starttime.tv_usec);
989 getmicrotime(&rt->tstamp);
990 nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ;
992 #endif /* NFS_NOSERVER */
995 * Get an authorization string for the uid by having the mount_nfs sitting
996 * on this mount point porpous out of the kernel and do it.
999 nfs_getauth(struct nfsmount *nmp, struct nfsreq *rep,
1000 struct ucred *cred, char **auth_str, int *auth_len, char *verf_str,
1001 int *verf_len, NFSKERBKEY_T key /* return session key */)
1005 while ((nmp->nm_state & NFSSTA_WAITAUTH) == 0) {
1006 nmp->nm_state |= NFSSTA_WANTAUTH;
1007 (void) tsleep((caddr_t)&nmp->nm_authtype, 0,
1008 "nfsauth1", 2 * hz);
1009 error = nfs_sigintr(nmp, rep, rep->r_td);
1011 nmp->nm_state &= ~NFSSTA_WANTAUTH;
1015 nmp->nm_state &= ~(NFSSTA_WAITAUTH | NFSSTA_WANTAUTH);
1016 nmp->nm_authstr = *auth_str = (char *)kmalloc(RPCAUTH_MAXSIZ, M_TEMP, M_WAITOK);
1017 nmp->nm_authlen = RPCAUTH_MAXSIZ;
1018 nmp->nm_verfstr = verf_str;
1019 nmp->nm_verflen = *verf_len;
1020 nmp->nm_authuid = cred->cr_uid;
1021 wakeup((caddr_t)&nmp->nm_authstr);
1024 * And wait for mount_nfs to do its stuff.
1026 while ((nmp->nm_state & NFSSTA_HASAUTH) == 0 && error == 0) {
1027 (void) tsleep((caddr_t)&nmp->nm_authlen, 0,
1028 "nfsauth2", 2 * hz);
1029 error = nfs_sigintr(nmp, rep, rep->r_td);
1031 if (nmp->nm_state & NFSSTA_AUTHERR) {
1032 nmp->nm_state &= ~NFSSTA_AUTHERR;
1036 kfree((caddr_t)*auth_str, M_TEMP);
1038 *auth_len = nmp->nm_authlen;
1039 *verf_len = nmp->nm_verflen;
1040 bcopy((caddr_t)nmp->nm_key, (caddr_t)key, sizeof (key));
1042 nmp->nm_state &= ~NFSSTA_HASAUTH;
1043 nmp->nm_state |= NFSSTA_WAITAUTH;
1044 if (nmp->nm_state & NFSSTA_WANTAUTH) {
1045 nmp->nm_state &= ~NFSSTA_WANTAUTH;
1046 wakeup((caddr_t)&nmp->nm_authtype);
1052 * Get a nickname authenticator and verifier.
1055 nfs_getnickauth(struct nfsmount *nmp, struct ucred *cred, char **auth_str,
1056 int *auth_len, char *verf_str, int verf_len)
1058 struct nfsuid *nuidp;
1059 u_int32_t *nickp, *verfp;
1060 struct timeval ktvin, ktvout;
1063 if (verf_len < (4 * NFSX_UNSIGNED))
1064 panic("nfs_getnickauth verf too small");
1066 for (nuidp = NMUIDHASH(nmp, cred->cr_uid)->lh_first;
1067 nuidp != 0; nuidp = nuidp->nu_hash.le_next) {
1068 if (nuidp->nu_cr.cr_uid == cred->cr_uid)
1071 if (!nuidp || nuidp->nu_expire < time_second)
1075 * Move to the end of the lru list (end of lru == most recently used).
1077 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru);
1078 TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, nu_lru);
1080 nickp = (u_int32_t *)kmalloc(2 * NFSX_UNSIGNED, M_TEMP, M_WAITOK);
1081 *nickp++ = txdr_unsigned(RPCAKN_NICKNAME);
1082 *nickp = txdr_unsigned(nuidp->nu_nickname);
1083 *auth_str = (char *)nickp;
1084 *auth_len = 2 * NFSX_UNSIGNED;
1087 * Now we must encrypt the verifier and package it up.
1089 verfp = (u_int32_t *)verf_str;
1090 *verfp++ = txdr_unsigned(RPCAKN_NICKNAME);
1091 if (time_second > nuidp->nu_timestamp.tv_sec ||
1092 (time_second == nuidp->nu_timestamp.tv_sec &&
1093 time_second > nuidp->nu_timestamp.tv_usec))
1094 getmicrotime(&nuidp->nu_timestamp);
1096 nuidp->nu_timestamp.tv_usec++;
1097 ktvin.tv_sec = txdr_unsigned(nuidp->nu_timestamp.tv_sec);
1098 ktvin.tv_usec = txdr_unsigned(nuidp->nu_timestamp.tv_usec);
1101 * Now encrypt the timestamp verifier in ecb mode using the session
1111 *verfp++ = ktvout.tv_sec;
1112 *verfp++ = ktvout.tv_usec;
1118 * Save the current nickname in a hash list entry on the mount point.
1121 nfs_savenickauth(struct nfsmount *nmp, struct ucred *cred, int len,
1122 NFSKERBKEY_T key, struct mbuf **mdp, char **dposp,
1125 struct nfsuid *nuidp;
1127 struct timeval ktvin, ktvout;
1129 int deltasec, error = 0;
1130 struct nfsm_info info;
1136 if (len == (3 * NFSX_UNSIGNED)) {
1137 NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED));
1138 ktvin.tv_sec = *tl++;
1139 ktvin.tv_usec = *tl++;
1140 nick = fxdr_unsigned(u_int32_t, *tl);
1143 * Decrypt the timestamp in ecb mode.
1151 ktvout.tv_sec = fxdr_unsigned(long, ktvout.tv_sec);
1152 ktvout.tv_usec = fxdr_unsigned(long, ktvout.tv_usec);
1153 deltasec = time_second - ktvout.tv_sec;
1155 deltasec = -deltasec;
1157 * If ok, add it to the hash list for the mount point.
1159 if (deltasec <= NFS_KERBCLOCKSKEW) {
1160 if (nmp->nm_numuids < nuidhash_max) {
1162 nuidp = (struct nfsuid *)
1163 kmalloc(sizeof (struct nfsuid), M_NFSUID,
1166 nuidp = TAILQ_FIRST(&nmp->nm_uidlruhead);
1167 LIST_REMOVE(nuidp, nu_hash);
1168 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp,
1172 nuidp->nu_cr.cr_uid = cred->cr_uid;
1173 nuidp->nu_expire = time_second + NFS_KERBTTL;
1174 nuidp->nu_timestamp = ktvout;
1175 nuidp->nu_nickname = nick;
1176 bcopy(key, nuidp->nu_key, sizeof (key));
1177 TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp,
1179 LIST_INSERT_HEAD(NMUIDHASH(nmp, cred->cr_uid),
1183 ERROROUT(nfsm_adv(&info, nfsm_rndup(len)));