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. 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. 23 * 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 34 * SUCH DAMAGE. 35 * 36 * @(#)nfs_nqlease.c 8.9 (Berkeley) 5/20/95 37 * $FreeBSD: src/sys/nfs/nfs_nqlease.c,v 1.50 2000/02/13 03:32:05 peter Exp $ 38 * $DragonFly: src/sys/vfs/nfs/nfs_kerb.c,v 1.3 2006/09/05 00:55:50 dillon Exp $ 39 */ 40 41 #include <sys/param.h> 42 #include <sys/vnode.h> 43 #include <sys/malloc.h> 44 #include <sys/mount.h> 45 #include <sys/kernel.h> 46 #include <sys/proc.h> 47 #include <sys/systm.h> 48 #include <sys/mbuf.h> 49 #include <sys/socket.h> 50 #include <sys/socketvar.h> 51 #include <sys/protosw.h> 52 53 #include <netinet/in.h> 54 #include "rpcv2.h" 55 #include "nfsproto.h" 56 #include "nfs.h" 57 #include "nfsm_subs.h" 58 #include "xdr_subs.h" 59 #include "nfsmount.h" 60 #include "nfsnode.h" 61 62 #include <sys/thread2.h> 63 64 #define TRUE 1 65 #define FALSE 0 66 67 #ifndef NFS_NOSERVER 68 69 /* 70 * Nqnfs client helper daemon. Runs once a second to expire leases. 71 * It also get authorization strings for "kerb" mounts. 72 * It must start at the beginning of the list again after any potential 73 * "sleep" since nfs_reclaim() called from vclean() can pull a node off 74 * the list asynchronously. 75 */ 76 int 77 nfs_clientd(struct nfsmount *nmp, struct ucred *cred, struct nfsd_cargs *ncd, 78 int flag, caddr_t argp, struct thread *td) 79 { 80 struct nfsuid *nuidp, *nnuidp; 81 int error = 0; 82 83 /* 84 * If an authorization string is being passed in, get it. 85 */ 86 if ((flag & NFSSVC_GOTAUTH) && 87 (nmp->nm_state & (NFSSTA_WAITAUTH | NFSSTA_DISMNT)) == 0) { 88 if (nmp->nm_state & NFSSTA_HASAUTH) 89 panic("cld kerb"); 90 if ((flag & NFSSVC_AUTHINFAIL) == 0) { 91 if (ncd->ncd_authlen <= nmp->nm_authlen && 92 ncd->ncd_verflen <= nmp->nm_verflen && 93 !copyin(ncd->ncd_authstr,nmp->nm_authstr,ncd->ncd_authlen)&& 94 !copyin(ncd->ncd_verfstr,nmp->nm_verfstr,ncd->ncd_verflen)){ 95 nmp->nm_authtype = ncd->ncd_authtype; 96 nmp->nm_authlen = ncd->ncd_authlen; 97 nmp->nm_verflen = ncd->ncd_verflen; 98 #ifdef NFSKERB 99 nmp->nm_key = ncd->ncd_key; 100 #endif 101 } else 102 nmp->nm_state |= NFSSTA_AUTHERR; 103 } else 104 nmp->nm_state |= NFSSTA_AUTHERR; 105 nmp->nm_state |= NFSSTA_HASAUTH; 106 wakeup((caddr_t)&nmp->nm_authlen); 107 } else 108 nmp->nm_state |= NFSSTA_WAITAUTH; 109 110 /* 111 * Loop every second updating queue until there is a termination sig. 112 */ 113 while ((nmp->nm_state & NFSSTA_DISMNT) == 0) { 114 /* 115 * Get an authorization string, if required. 116 */ 117 if ((nmp->nm_state & (NFSSTA_WAITAUTH | NFSSTA_DISMNT | NFSSTA_HASAUTH)) == 0) { 118 ncd->ncd_authuid = nmp->nm_authuid; 119 if (copyout((caddr_t)ncd, argp, sizeof (struct nfsd_cargs))) 120 nmp->nm_state |= NFSSTA_WAITAUTH; 121 else 122 return (ENEEDAUTH); 123 } 124 125 /* 126 * Wait a bit (no pun) and do it again. 127 */ 128 if ((nmp->nm_state & NFSSTA_DISMNT) == 0 && 129 (nmp->nm_state & (NFSSTA_WAITAUTH | NFSSTA_HASAUTH))) { 130 error = tsleep((caddr_t)&nmp->nm_authstr, PCATCH, 131 "nqnfstimr", hz / 3); 132 if (error == EINTR || error == ERESTART) 133 (void) dounmount(nmp->nm_mountp, 0); 134 } 135 } 136 137 /* 138 * Finally, we can free up the mount structure. 139 */ 140 TAILQ_FOREACH_MUTABLE(nuidp, &nmp->nm_uidlruhead, nu_lru, nnuidp) { 141 LIST_REMOVE(nuidp, nu_hash); 142 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru); 143 kfree((caddr_t)nuidp, M_NFSUID); 144 } 145 nfs_free_mount(nmp); 146 if (error == EWOULDBLOCK) 147 error = 0; 148 return (error); 149 } 150 151 #endif /* NFS_NOSERVER */ 152 153