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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
95 lines
3.3 KiB
C
95 lines
3.3 KiB
C
/*
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rpcsec_gss.h
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Copyright (c) 2000 The Regents of the University of Michigan.
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All rights reserved.
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Copyright (c) 2000 Dug Song <dugsong@UMICH.EDU>.
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All rights reserved, all wrongs reversed.
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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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3. Neither the name of the University nor the names of its
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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$Id: auth_gss.h,v 1.12 2001/04/30 19:44:47 andros Exp $
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*/
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/* $FreeBSD$ */
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#ifndef _RPCSEC_GSS_INT_H
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#define _RPCSEC_GSS_INT_H
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#include <kgssapi/gssapi_impl.h>
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/* RPCSEC_GSS control procedures. */
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typedef enum {
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RPCSEC_GSS_DATA = 0,
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RPCSEC_GSS_INIT = 1,
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RPCSEC_GSS_CONTINUE_INIT = 2,
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RPCSEC_GSS_DESTROY = 3
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} rpc_gss_proc_t;
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#define RPCSEC_GSS_VERSION 1
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/* Credentials. */
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struct rpc_gss_cred {
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u_int gc_version; /* version */
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rpc_gss_proc_t gc_proc; /* control procedure */
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u_int gc_seq; /* sequence number */
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rpc_gss_service_t gc_svc; /* service */
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gss_buffer_desc gc_handle; /* handle to server-side context */
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};
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/* Context creation response. */
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struct rpc_gss_init_res {
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gss_buffer_desc gr_handle; /* handle to server-side context */
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u_int gr_major; /* major status */
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u_int gr_minor; /* minor status */
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u_int gr_win; /* sequence window */
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gss_buffer_desc gr_token; /* token */
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};
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/* Maximum sequence number value. */
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#define MAXSEQ 0x80000000
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/* Prototypes. */
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__BEGIN_DECLS
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bool_t xdr_rpc_gss_cred(XDR *xdrs, struct rpc_gss_cred *p);
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bool_t xdr_rpc_gss_init_res(XDR *xdrs, struct rpc_gss_init_res *p);
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bool_t xdr_rpc_gss_wrap_data(struct mbuf **argsp,
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gss_ctx_id_t ctx, gss_qop_t qop, rpc_gss_service_t svc,
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u_int seq);
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bool_t xdr_rpc_gss_unwrap_data(struct mbuf **resultsp,
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gss_ctx_id_t ctx, gss_qop_t qop, rpc_gss_service_t svc, u_int seq);
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const char *_rpc_gss_num_to_qop(const char *mech, u_int num);
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void _rpc_gss_set_error(int rpc_gss_error, int system_error);
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void rpc_gss_log_debug(const char *fmt, ...);
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void rpc_gss_log_status(const char *m, gss_OID mech, OM_uint32 major,
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OM_uint32 minor);
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__END_DECLS
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#endif /* !_RPCSEC_GSS_INT_H */
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