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