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and server. This replaces the RPC implementation of the NFS client and server with the newer RPC implementation originally developed (actually ported from the userland sunrpc code) to support the NFS Lock Manager. I have tested this code extensively and I believe it is stable and that performance is at least equal to the legacy RPC implementation. The NFS code currently contains support for both the new RPC implementation and the older legacy implementation inherited from the original NFS codebase. The default is to use the new implementation - add the NFS_LEGACYRPC option to fall back to the old code. When I merge this support back to RELENG_7, I will probably change this so that users have to 'opt in' to get the new code. To use RPCSEC_GSS on either client or server, you must build a kernel which includes the KGSSAPI option and the crypto device. On the userland side, you must build at least a new libc, mountd, mount_nfs and gssd. You must install new versions of /etc/rc.d/gssd and /etc/rc.d/nfsd and add 'gssd_enable=YES' to /etc/rc.conf. As long as gssd is running, you should be able to mount an NFS filesystem from a server that requires RPCSEC_GSS authentication. The mount itself can happen without any kerberos credentials but all access to the filesystem will be denied unless the accessing user has a valid ticket file in the standard place (/tmp/krb5cc_<uid>). There is currently no support for situations where the ticket file is in a different place, such as when the user logged in via SSH and has delegated credentials from that login. This restriction is also present in Solaris and Linux. In theory, we could improve this in future, possibly using Brooks Davis' implementation of variant symlinks. Supporting RPCSEC_GSS on a server is nearly as simple. You must create service creds for the server in the form 'nfs/<fqdn>@<REALM>' and install them in /etc/krb5.keytab. The standard heimdal utility ktutil makes this fairly easy. After the service creds have been created, you can add a '-sec=krb5' option to /etc/exports and restart both mountd and nfsd. The only other difference an administrator should notice is that nfsd doesn't fork to create service threads any more. In normal operation, there will be two nfsd processes, one in userland waiting for TCP connections and one in the kernel handling requests. The latter process will create as many kthreads as required - these should be visible via 'top -H'. The code has some support for varying the number of service threads according to load but initially at least, nfsd uses a fixed number of threads according to the value supplied to its '-n' option. Sponsored by: Isilon Systems MFC after: 1 month
90 lines
2.9 KiB
C
90 lines
2.9 KiB
C
/*-
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* Copyright (c) 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Rick Macklem at The University of Guelph.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)nfsrvcache.h 8.3 (Berkeley) 3/30/95
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* $FreeBSD$
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*/
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#ifndef _NFSSERVER_NFSRVCACHE_H_
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#define _NFSSERVER_NFSRVCACHE_H_
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#include <sys/queue.h>
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/*
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* Definitions for the server recent request cache
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*/
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#define NFSRVCACHE_MAX_SIZE 2048
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#define NFSRVCACHE_MIN_SIZE 64
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#ifdef NFS_LEGACYRPC
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struct nfsrvcache {
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TAILQ_ENTRY(nfsrvcache) rc_lru; /* LRU chain */
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LIST_ENTRY(nfsrvcache) rc_hash; /* Hash chain */
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u_int32_t rc_xid; /* rpc id number */
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union {
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struct mbuf *ru_repmb; /* Reply mbuf list OR */
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int ru_repstat; /* Reply status */
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} rc_un;
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union nethostaddr rc_haddr; /* Host address */
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u_int32_t rc_proc; /* rpc proc number */
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u_char rc_state; /* Current state of request */
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u_char rc_flag; /* Flag bits */
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};
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#define rc_reply rc_un.ru_repmb
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#define rc_status rc_un.ru_repstat
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#define rc_inetaddr rc_haddr.had_inetaddr
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#define rc_nam rc_haddr.had_nam
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/* Cache entry states */
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#define RC_UNUSED 0
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#define RC_INPROG 1
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#define RC_DONE 2
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/* Return values */
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#define RC_DROPIT 0
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#define RC_REPLY 1
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#define RC_DOIT 2
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/* Flag bits */
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#define RC_LOCKED 0x01
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#define RC_WANTED 0x02
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#define RC_REPSTATUS 0x04
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#define RC_REPMBUF 0x08
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/* free 0x10 */
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#define RC_INETADDR 0x20
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#define RC_NAM 0x40
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#endif
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#endif
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