1 /*
2 * Copyright (c) 1992, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Rick Macklem at The University of Guelph.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
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. 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.
19 *
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
30 * SUCH DAMAGE.
31 *
32 * @(#)nfs_nqlease.c 8.9 (Berkeley) 5/20/95
33 * $FreeBSD: src/sys/nfs/nfs_nqlease.c,v 1.50 2000/02/13 03:32:05 peter Exp $
34 */
35
36 #include <sys/param.h>
37 #include <sys/vnode.h>
38 #include <sys/malloc.h>
39 #include <sys/mount.h>
40 #include <sys/kernel.h>
41 #include <sys/proc.h>
42 #include <sys/systm.h>
43 #include <sys/mbuf.h>
44 #include <sys/socket.h>
45 #include <sys/socketvar.h>
46 #include <sys/protosw.h>
47
48 #include <netinet/in.h>
49 #include "rpcv2.h"
50 #include "nfsproto.h"
51 #include "nfs.h"
52 #include "nfsm_subs.h"
53 #include "xdr_subs.h"
54 #include "nfsmount.h"
55 #include "nfsnode.h"
56
57 #define TRUE 1
58 #define FALSE 0
59
60 #ifndef NFS_NOSERVER
61
62 /*
63 * Nqnfs client helper daemon. Runs once a second to expire leases.
64 * It also get authorization strings for "kerb" mounts.
65 * It must start at the beginning of the list again after any potential
66 * "sleep" since nfs_reclaim() called from vclean() can pull a node off
67 * the list asynchronously.
68 */
69 int
nfs_clientd(struct nfsmount * nmp,struct ucred * cred,struct nfsd_cargs * ncd,int flag,caddr_t argp,struct thread * td)70 nfs_clientd(struct nfsmount *nmp, struct ucred *cred, struct nfsd_cargs *ncd,
71 int flag, caddr_t argp, struct thread *td)
72 {
73 struct nfsuid *nuidp, *nnuidp;
74 int error = 0;
75
76 /*
77 * If an authorization string is being passed in, get it.
78 */
79 if ((flag & NFSSVC_GOTAUTH) &&
80 (nmp->nm_state & (NFSSTA_WAITAUTH | NFSSTA_DISMNT)) == 0) {
81 if (nmp->nm_state & NFSSTA_HASAUTH)
82 panic("cld kerb");
83 if ((flag & NFSSVC_AUTHINFAIL) == 0) {
84 if (ncd->ncd_authlen <= nmp->nm_authlen &&
85 ncd->ncd_verflen <= nmp->nm_verflen &&
86 !copyin(ncd->ncd_authstr,nmp->nm_authstr,ncd->ncd_authlen)&&
87 !copyin(ncd->ncd_verfstr,nmp->nm_verfstr,ncd->ncd_verflen)){
88 nmp->nm_authtype = ncd->ncd_authtype;
89 nmp->nm_authlen = ncd->ncd_authlen;
90 nmp->nm_verflen = ncd->ncd_verflen;
91 #ifdef NFSKERB
92 nmp->nm_key = ncd->ncd_key;
93 #endif
94 } else
95 nmp->nm_state |= NFSSTA_AUTHERR;
96 } else
97 nmp->nm_state |= NFSSTA_AUTHERR;
98 nmp->nm_state |= NFSSTA_HASAUTH;
99 wakeup((caddr_t)&nmp->nm_authlen);
100 } else
101 nmp->nm_state |= NFSSTA_WAITAUTH;
102
103 /*
104 * Loop every second updating queue until there is a termination sig.
105 */
106 while ((nmp->nm_state & NFSSTA_DISMNT) == 0) {
107 /*
108 * Get an authorization string, if required.
109 */
110 if ((nmp->nm_state & (NFSSTA_WAITAUTH | NFSSTA_DISMNT | NFSSTA_HASAUTH)) == 0) {
111 ncd->ncd_authuid = nmp->nm_authuid;
112 if (copyout((caddr_t)ncd, argp, sizeof (struct nfsd_cargs)))
113 nmp->nm_state |= NFSSTA_WAITAUTH;
114 else
115 return (ENEEDAUTH);
116 }
117
118 /*
119 * Wait a bit (no pun) and do it again.
120 */
121 if ((nmp->nm_state & NFSSTA_DISMNT) == 0 &&
122 (nmp->nm_state & (NFSSTA_WAITAUTH | NFSSTA_HASAUTH))) {
123 error = tsleep((caddr_t)&nmp->nm_authstr, PCATCH,
124 "nqnfstimr", hz / 3);
125 if (error == EINTR || error == ERESTART)
126 (void) dounmount(nmp->nm_mountp, 0, 0);
127 }
128 }
129
130 /*
131 * Finally, we can free up the mount structure.
132 */
133 TAILQ_FOREACH_MUTABLE(nuidp, &nmp->nm_uidlruhead, nu_lru, nnuidp) {
134 LIST_REMOVE(nuidp, nu_hash);
135 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru);
136 kfree((caddr_t)nuidp, M_NFSUID);
137 }
138 nfs_free_mount(nmp);
139 if (error == EWOULDBLOCK)
140 error = 0;
141 return (error);
142 }
143
144 #endif /* NFS_NOSERVER */
145
146