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 <vm/vm_zone.h> 54 55 #include <netinet/in.h> 56 #include "rpcv2.h" 57 #include "nfsproto.h" 58 #include "nfs.h" 59 #include "nfsm_subs.h" 60 #include "xdr_subs.h" 61 #include "nfsmount.h" 62 #include "nfsnode.h" 63 64 #include <sys/thread2.h> 65 66 #define TRUE 1 67 #define FALSE 0 68 69 #ifndef NFS_NOSERVER 70 71 /* 72 * Nqnfs client helper daemon. Runs once a second to expire leases. 73 * It also get authorization strings for "kerb" mounts. 74 * It must start at the beginning of the list again after any potential 75 * "sleep" since nfs_reclaim() called from vclean() can pull a node off 76 * the list asynchronously. 77 */ 78 int 79 nfs_clientd(struct nfsmount *nmp, struct ucred *cred, struct nfsd_cargs *ncd, 80 int flag, caddr_t argp, struct thread *td) 81 { 82 struct nfsuid *nuidp, *nnuidp; 83 int error = 0; 84 85 /* 86 * If an authorization string is being passed in, get it. 87 */ 88 if ((flag & NFSSVC_GOTAUTH) && 89 (nmp->nm_state & (NFSSTA_WAITAUTH | NFSSTA_DISMNT)) == 0) { 90 if (nmp->nm_state & NFSSTA_HASAUTH) 91 panic("cld kerb"); 92 if ((flag & NFSSVC_AUTHINFAIL) == 0) { 93 if (ncd->ncd_authlen <= nmp->nm_authlen && 94 ncd->ncd_verflen <= nmp->nm_verflen && 95 !copyin(ncd->ncd_authstr,nmp->nm_authstr,ncd->ncd_authlen)&& 96 !copyin(ncd->ncd_verfstr,nmp->nm_verfstr,ncd->ncd_verflen)){ 97 nmp->nm_authtype = ncd->ncd_authtype; 98 nmp->nm_authlen = ncd->ncd_authlen; 99 nmp->nm_verflen = ncd->ncd_verflen; 100 #ifdef NFSKERB 101 nmp->nm_key = ncd->ncd_key; 102 #endif 103 } else 104 nmp->nm_state |= NFSSTA_AUTHERR; 105 } else 106 nmp->nm_state |= NFSSTA_AUTHERR; 107 nmp->nm_state |= NFSSTA_HASAUTH; 108 wakeup((caddr_t)&nmp->nm_authlen); 109 } else 110 nmp->nm_state |= NFSSTA_WAITAUTH; 111 112 /* 113 * Loop every second updating queue until there is a termination sig. 114 */ 115 while ((nmp->nm_state & NFSSTA_DISMNT) == 0) { 116 /* 117 * Get an authorization string, if required. 118 */ 119 if ((nmp->nm_state & (NFSSTA_WAITAUTH | NFSSTA_DISMNT | NFSSTA_HASAUTH)) == 0) { 120 ncd->ncd_authuid = nmp->nm_authuid; 121 if (copyout((caddr_t)ncd, argp, sizeof (struct nfsd_cargs))) 122 nmp->nm_state |= NFSSTA_WAITAUTH; 123 else 124 return (ENEEDAUTH); 125 } 126 127 /* 128 * Wait a bit (no pun) and do it again. 129 */ 130 if ((nmp->nm_state & NFSSTA_DISMNT) == 0 && 131 (nmp->nm_state & (NFSSTA_WAITAUTH | NFSSTA_HASAUTH))) { 132 error = tsleep((caddr_t)&nmp->nm_authstr, PCATCH, 133 "nqnfstimr", hz / 3); 134 if (error == EINTR || error == ERESTART) 135 (void) dounmount(nmp->nm_mountp, 0); 136 } 137 } 138 139 /* 140 * Finally, we can free up the mount structure. 141 */ 142 TAILQ_FOREACH_MUTABLE(nuidp, &nmp->nm_uidlruhead, nu_lru, nnuidp) { 143 LIST_REMOVE(nuidp, nu_hash); 144 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru); 145 kfree((caddr_t)nuidp, M_NFSUID); 146 } 147 nfs_free_mount(nmp); 148 if (error == EWOULDBLOCK) 149 error = 0; 150 return (error); 151 } 152 153 #endif /* NFS_NOSERVER */ 154 155