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freebsd-skq/sys/nlm/nlm_prot_svc.c
dfr 2fb03513fc Implement support for RPCSEC_GSS authentication to both the NFS client 
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
2008-11-03 10:38:00 +00:00

526 lines
16 KiB
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/*-
* Copyright (c) 2008 Isilon Inc http://www.isilon.com/
* Authors: Doug Rabson <dfr@rabson.org>
* Developed with Red Inc: Alfred Perlstein <alfred@freebsd.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <nlm/nlm_prot.h>
#include <nlm/nlm.h>
#include <sys/cdefs.h>
#ifndef lint
/*static char sccsid[] = "from: @(#)nlm_prot.x 1.8 87/09/21 Copyr 1987 Sun Micro";*/
/*static char sccsid[] = "from: * @(#)nlm_prot.x 2.1 88/08/01 4.0 RPCSRC";*/
__RCSID("$NetBSD: nlm_prot.x,v 1.6 2000/06/07 14:30:15 bouyer Exp $");
#endif /* not lint */
__FBSDID("$FreeBSD$");
void nlm_prog_0(struct svc_req *rqstp, SVCXPRT *transp);
void nlm_prog_1(struct svc_req *rqstp, SVCXPRT *transp);
void nlm_prog_3(struct svc_req *rqstp, SVCXPRT *transp);
void nlm_prog_4(struct svc_req *rqstp, SVCXPRT *transp);
void
nlm_prog_0(struct svc_req *rqstp, SVCXPRT *transp)
{
union {
struct nlm_sm_status nlm_sm_notify_0_arg;
} argument;
char result;
bool_t retval;
xdrproc_t xdr_argument, xdr_result;
bool_t (*local)(char *, void *, struct svc_req *);
switch (rqstp->rq_proc) {
case NULLPROC:
(void) svc_sendreply(rqstp,
(xdrproc_t) xdr_void, (char *)NULL);
svc_freereq(rqstp);
return;
case NLM_SM_NOTIFY:
xdr_argument = (xdrproc_t) xdr_nlm_sm_status;
xdr_result = (xdrproc_t) xdr_void;
local = (bool_t (*) (char *, void *, struct svc_req *))nlm_sm_notify_0_svc;
break;
default:
svcerr_noproc(rqstp);
svc_freereq(rqstp);
return;
}
(void) memset((char *)&argument, 0, sizeof (argument));
if (!svc_getargs(rqstp, xdr_argument, (char *)(caddr_t) &argument)) {
svcerr_decode(rqstp);
svc_freereq(rqstp);
return;
}
retval = (bool_t) (*local)((char *)&argument, (void *)&result, rqstp);
if (retval > 0 && !svc_sendreply(rqstp, xdr_result, (char *)&result)) {
svcerr_systemerr(rqstp);
}
svc_freereq(rqstp);
if (!svc_freeargs(rqstp, xdr_argument, (char *)(caddr_t) &argument)) {
printf("unable to free arguments");
//exit(1);
}
return;
}
void
nlm_prog_1(struct svc_req *rqstp, SVCXPRT *transp)
{
union {
struct nlm_testargs nlm_test_1_arg;
struct nlm_lockargs nlm_lock_1_arg;
struct nlm_cancargs nlm_cancel_1_arg;
struct nlm_unlockargs nlm_unlock_1_arg;
struct nlm_testargs nlm_granted_1_arg;
struct nlm_testargs nlm_test_msg_1_arg;
struct nlm_lockargs nlm_lock_msg_1_arg;
struct nlm_cancargs nlm_cancel_msg_1_arg;
struct nlm_unlockargs nlm_unlock_msg_1_arg;
struct nlm_testargs nlm_granted_msg_1_arg;
nlm_testres nlm_test_res_1_arg;
nlm_res nlm_lock_res_1_arg;
nlm_res nlm_cancel_res_1_arg;
nlm_res nlm_unlock_res_1_arg;
nlm_res nlm_granted_res_1_arg;
} argument;
union {
nlm_testres nlm_test_1_res;
nlm_res nlm_lock_1_res;
nlm_res nlm_cancel_1_res;
nlm_res nlm_unlock_1_res;
nlm_res nlm_granted_1_res;
} result;
bool_t retval;
xdrproc_t xdr_argument, xdr_result;
bool_t (*local)(char *, void *, struct svc_req *);
switch (rqstp->rq_proc) {
case NULLPROC:
(void) svc_sendreply(rqstp,
(xdrproc_t) xdr_void, (char *)NULL);
svc_freereq(rqstp);
return;
case NLM_TEST:
xdr_argument = (xdrproc_t) xdr_nlm_testargs;
xdr_result = (xdrproc_t) xdr_nlm_testres;
local = (bool_t (*) (char *, void *, struct svc_req *))nlm_test_1_svc;
break;
case NLM_LOCK:
xdr_argument = (xdrproc_t) xdr_nlm_lockargs;
xdr_result = (xdrproc_t) xdr_nlm_res;
local = (bool_t (*) (char *, void *, struct svc_req *))nlm_lock_1_svc;
break;
case NLM_CANCEL:
xdr_argument = (xdrproc_t) xdr_nlm_cancargs;
xdr_result = (xdrproc_t) xdr_nlm_res;
local = (bool_t (*) (char *, void *, struct svc_req *))nlm_cancel_1_svc;
break;
case NLM_UNLOCK:
xdr_argument = (xdrproc_t) xdr_nlm_unlockargs;
xdr_result = (xdrproc_t) xdr_nlm_res;
local = (bool_t (*) (char *, void *, struct svc_req *))nlm_unlock_1_svc;
break;
case NLM_GRANTED:
xdr_argument = (xdrproc_t) xdr_nlm_testargs;
xdr_result = (xdrproc_t) xdr_nlm_res;
local = (bool_t (*) (char *, void *, struct svc_req *))nlm_granted_1_svc;
break;
case NLM_TEST_MSG:
xdr_argument = (xdrproc_t) xdr_nlm_testargs;
xdr_result = (xdrproc_t) xdr_void;
local = (bool_t (*) (char *, void *, struct svc_req *))nlm_test_msg_1_svc;
break;
case NLM_LOCK_MSG:
xdr_argument = (xdrproc_t) xdr_nlm_lockargs;
xdr_result = (xdrproc_t) xdr_void;
local = (bool_t (*) (char *, void *, struct svc_req *))nlm_lock_msg_1_svc;
break;
case NLM_CANCEL_MSG:
xdr_argument = (xdrproc_t) xdr_nlm_cancargs;
xdr_result = (xdrproc_t) xdr_void;
local = (bool_t (*) (char *, void *, struct svc_req *))nlm_cancel_msg_1_svc;
break;
case NLM_UNLOCK_MSG:
xdr_argument = (xdrproc_t) xdr_nlm_unlockargs;
xdr_result = (xdrproc_t) xdr_void;
local = (bool_t (*) (char *, void *, struct svc_req *))nlm_unlock_msg_1_svc;
break;
case NLM_GRANTED_MSG:
xdr_argument = (xdrproc_t) xdr_nlm_testargs;
xdr_result = (xdrproc_t) xdr_void;
local = (bool_t (*) (char *, void *, struct svc_req *))nlm_granted_msg_1_svc;
break;
case NLM_TEST_RES:
xdr_argument = (xdrproc_t) xdr_nlm_testres;
xdr_result = (xdrproc_t) xdr_void;
local = (bool_t (*) (char *, void *, struct svc_req *))nlm_test_res_1_svc;
break;
case NLM_LOCK_RES:
xdr_argument = (xdrproc_t) xdr_nlm_res;
xdr_result = (xdrproc_t) xdr_void;
local = (bool_t (*) (char *, void *, struct svc_req *))nlm_lock_res_1_svc;
break;
case NLM_CANCEL_RES:
xdr_argument = (xdrproc_t) xdr_nlm_res;
xdr_result = (xdrproc_t) xdr_void;
local = (bool_t (*) (char *, void *, struct svc_req *))nlm_cancel_res_1_svc;
break;
case NLM_UNLOCK_RES:
xdr_argument = (xdrproc_t) xdr_nlm_res;
xdr_result = (xdrproc_t) xdr_void;
local = (bool_t (*) (char *, void *, struct svc_req *))nlm_unlock_res_1_svc;
break;
case NLM_GRANTED_RES:
xdr_argument = (xdrproc_t) xdr_nlm_res;
xdr_result = (xdrproc_t) xdr_void;
local = (bool_t (*) (char *, void *, struct svc_req *))nlm_granted_res_1_svc;
break;
default:
svcerr_noproc(rqstp);
svc_freereq(rqstp);
return;
}
(void) memset((char *)&argument, 0, sizeof (argument));
if (!svc_getargs(rqstp, xdr_argument, (char *)(caddr_t) &argument)) {
svcerr_decode(rqstp);
svc_freereq(rqstp);
return;
}
retval = (bool_t) (*local)((char *)&argument, (void *)&result, rqstp);
if (retval > 0 && !svc_sendreply(rqstp, xdr_result, (char *)&result)) {
svcerr_systemerr(rqstp);
}
if (!svc_freeargs(rqstp, xdr_argument, (char *)(caddr_t) &argument)) {
printf("unable to free arguments");
//exit(1);
}
svc_freereq(rqstp);
if (!nlm_prog_1_freeresult(transp, xdr_result, (caddr_t) &result))
printf("unable to free results");
return;
}
void
nlm_prog_3(struct svc_req *rqstp, SVCXPRT *transp)
{
union {
nlm_shareargs nlm_share_3_arg;
nlm_shareargs nlm_unshare_3_arg;
nlm_lockargs nlm_nm_lock_3_arg;
nlm_notify nlm_free_all_3_arg;
} argument;
union {
nlm_shareres nlm_share_3_res;
nlm_shareres nlm_unshare_3_res;
nlm_res nlm_nm_lock_3_res;
} result;
bool_t retval;
xdrproc_t xdr_argument, xdr_result;
bool_t (*local)(char *, void *, struct svc_req *);
switch (rqstp->rq_proc) {
case NULLPROC:
(void) svc_sendreply(rqstp,
(xdrproc_t) xdr_void, (char *)NULL);
svc_freereq(rqstp);
return;
case NLM_TEST:
case NLM_LOCK:
case NLM_CANCEL:
case NLM_UNLOCK:
case NLM_GRANTED:
case NLM_TEST_MSG:
case NLM_LOCK_MSG:
case NLM_CANCEL_MSG:
case NLM_UNLOCK_MSG:
case NLM_GRANTED_MSG:
case NLM_TEST_RES:
case NLM_LOCK_RES:
case NLM_CANCEL_RES:
case NLM_UNLOCK_RES:
case NLM_GRANTED_RES:
nlm_prog_1(rqstp, transp);
return;
case NLM_SHARE:
xdr_argument = (xdrproc_t) xdr_nlm_shareargs;
xdr_result = (xdrproc_t) xdr_nlm_shareres;
local = (bool_t (*) (char *, void *, struct svc_req *))nlm_share_3_svc;
break;
case NLM_UNSHARE:
xdr_argument = (xdrproc_t) xdr_nlm_shareargs;
xdr_result = (xdrproc_t) xdr_nlm_shareres;
local = (bool_t (*) (char *, void *, struct svc_req *))nlm_unshare_3_svc;
break;
case NLM_NM_LOCK:
xdr_argument = (xdrproc_t) xdr_nlm_lockargs;
xdr_result = (xdrproc_t) xdr_nlm_res;
local = (bool_t (*) (char *, void *, struct svc_req *))nlm_nm_lock_3_svc;
break;
case NLM_FREE_ALL:
xdr_argument = (xdrproc_t) xdr_nlm_notify;
xdr_result = (xdrproc_t) xdr_void;
local = (bool_t (*) (char *, void *, struct svc_req *))nlm_free_all_3_svc;
break;
default:
svcerr_noproc(rqstp);
svc_freereq(rqstp);
return;
}
(void) memset((char *)&argument, 0, sizeof (argument));
if (!svc_getargs(rqstp, xdr_argument, (char *)(caddr_t) &argument)) {
svcerr_decode(rqstp);
svc_freereq(rqstp);
return;
}
retval = (bool_t) (*local)((char *)&argument, (void *)&result, rqstp);
if (retval > 0 && !svc_sendreply(rqstp, xdr_result, (char *)&result)) {
svcerr_systemerr(rqstp);
}
if (!svc_freeargs(rqstp, xdr_argument, (char *)(caddr_t) &argument)) {
printf("unable to free arguments");
//exit(1);
}
svc_freereq(rqstp);
if (!nlm_prog_3_freeresult(transp, xdr_result, (caddr_t) &result))
printf("unable to free results");
return;
}
void
nlm_prog_4(struct svc_req *rqstp, SVCXPRT *transp)
{
union {
nlm4_testargs nlm4_test_4_arg;
nlm4_lockargs nlm4_lock_4_arg;
nlm4_cancargs nlm4_cancel_4_arg;
nlm4_unlockargs nlm4_unlock_4_arg;
nlm4_testargs nlm4_granted_4_arg;
nlm4_testargs nlm4_test_msg_4_arg;
nlm4_lockargs nlm4_lock_msg_4_arg;
nlm4_cancargs nlm4_cancel_msg_4_arg;
nlm4_unlockargs nlm4_unlock_msg_4_arg;
nlm4_testargs nlm4_granted_msg_4_arg;
nlm4_testres nlm4_test_res_4_arg;
nlm4_res nlm4_lock_res_4_arg;
nlm4_res nlm4_cancel_res_4_arg;
nlm4_res nlm4_unlock_res_4_arg;
nlm4_res nlm4_granted_res_4_arg;
nlm4_shareargs nlm4_share_4_arg;
nlm4_shareargs nlm4_unshare_4_arg;
nlm4_lockargs nlm4_nm_lock_4_arg;
nlm4_notify nlm4_free_all_4_arg;
} argument;
union {
nlm4_testres nlm4_test_4_res;
nlm4_res nlm4_lock_4_res;
nlm4_res nlm4_cancel_4_res;
nlm4_res nlm4_unlock_4_res;
nlm4_res nlm4_granted_4_res;
nlm4_shareres nlm4_share_4_res;
nlm4_shareres nlm4_unshare_4_res;
nlm4_res nlm4_nm_lock_4_res;
} result;
bool_t retval;
xdrproc_t xdr_argument, xdr_result;
bool_t (*local)(char *, void *, struct svc_req *);
switch (rqstp->rq_proc) {
case NULLPROC:
(void) svc_sendreply(rqstp,
(xdrproc_t) xdr_void, (char *)NULL);
svc_freereq(rqstp);
return;
case NLM4_TEST:
xdr_argument = (xdrproc_t) xdr_nlm4_testargs;
xdr_result = (xdrproc_t) xdr_nlm4_testres;
local = (bool_t (*) (char *, void *, struct svc_req *))nlm4_test_4_svc;
break;
case NLM4_LOCK:
xdr_argument = (xdrproc_t) xdr_nlm4_lockargs;
xdr_result = (xdrproc_t) xdr_nlm4_res;
local = (bool_t (*) (char *, void *, struct svc_req *))nlm4_lock_4_svc;
break;
case NLM4_CANCEL:
xdr_argument = (xdrproc_t) xdr_nlm4_cancargs;
xdr_result = (xdrproc_t) xdr_nlm4_res;
local = (bool_t (*) (char *, void *, struct svc_req *))nlm4_cancel_4_svc;
break;
case NLM4_UNLOCK:
xdr_argument = (xdrproc_t) xdr_nlm4_unlockargs;
xdr_result = (xdrproc_t) xdr_nlm4_res;
local = (bool_t (*) (char *, void *, struct svc_req *))nlm4_unlock_4_svc;
break;
case NLM4_GRANTED:
xdr_argument = (xdrproc_t) xdr_nlm4_testargs;
xdr_result = (xdrproc_t) xdr_nlm4_res;
local = (bool_t (*) (char *, void *, struct svc_req *))nlm4_granted_4_svc;
break;
case NLM4_TEST_MSG:
xdr_argument = (xdrproc_t) xdr_nlm4_testargs;
xdr_result = (xdrproc_t) xdr_void;
local = (bool_t (*) (char *, void *, struct svc_req *))nlm4_test_msg_4_svc;
break;
case NLM4_LOCK_MSG:
xdr_argument = (xdrproc_t) xdr_nlm4_lockargs;
xdr_result = (xdrproc_t) xdr_void;
local = (bool_t (*) (char *, void *, struct svc_req *))nlm4_lock_msg_4_svc;
break;
case NLM4_CANCEL_MSG:
xdr_argument = (xdrproc_t) xdr_nlm4_cancargs;
xdr_result = (xdrproc_t) xdr_void;
local = (bool_t (*) (char *, void *, struct svc_req *))nlm4_cancel_msg_4_svc;
break;
case NLM4_UNLOCK_MSG:
xdr_argument = (xdrproc_t) xdr_nlm4_unlockargs;
xdr_result = (xdrproc_t) xdr_void;
local = (bool_t (*) (char *, void *, struct svc_req *))nlm4_unlock_msg_4_svc;
break;
case NLM4_GRANTED_MSG:
xdr_argument = (xdrproc_t) xdr_nlm4_testargs;
xdr_result = (xdrproc_t) xdr_void;
local = (bool_t (*) (char *, void *, struct svc_req *))nlm4_granted_msg_4_svc;
break;
case NLM4_TEST_RES:
xdr_argument = (xdrproc_t) xdr_nlm4_testres;
xdr_result = (xdrproc_t) xdr_void;
local = (bool_t (*) (char *, void *, struct svc_req *))nlm4_test_res_4_svc;
break;
case NLM4_LOCK_RES:
xdr_argument = (xdrproc_t) xdr_nlm4_res;
xdr_result = (xdrproc_t) xdr_void;
local = (bool_t (*) (char *, void *, struct svc_req *))nlm4_lock_res_4_svc;
break;
case NLM4_CANCEL_RES:
xdr_argument = (xdrproc_t) xdr_nlm4_res;
xdr_result = (xdrproc_t) xdr_void;
local = (bool_t (*) (char *, void *, struct svc_req *))nlm4_cancel_res_4_svc;
break;
case NLM4_UNLOCK_RES:
xdr_argument = (xdrproc_t) xdr_nlm4_res;
xdr_result = (xdrproc_t) xdr_void;
local = (bool_t (*) (char *, void *, struct svc_req *))nlm4_unlock_res_4_svc;
break;
case NLM4_GRANTED_RES:
xdr_argument = (xdrproc_t) xdr_nlm4_res;
xdr_result = (xdrproc_t) xdr_void;
local = (bool_t (*) (char *, void *, struct svc_req *))nlm4_granted_res_4_svc;
break;
case NLM4_SHARE:
xdr_argument = (xdrproc_t) xdr_nlm4_shareargs;
xdr_result = (xdrproc_t) xdr_nlm4_shareres;
local = (bool_t (*) (char *, void *, struct svc_req *))nlm4_share_4_svc;
break;
case NLM4_UNSHARE:
xdr_argument = (xdrproc_t) xdr_nlm4_shareargs;
xdr_result = (xdrproc_t) xdr_nlm4_shareres;
local = (bool_t (*) (char *, void *, struct svc_req *))nlm4_unshare_4_svc;
break;
case NLM4_NM_LOCK:
xdr_argument = (xdrproc_t) xdr_nlm4_lockargs;
xdr_result = (xdrproc_t) xdr_nlm4_res;
local = (bool_t (*) (char *, void *, struct svc_req *))nlm4_nm_lock_4_svc;
break;
case NLM4_FREE_ALL:
xdr_argument = (xdrproc_t) xdr_nlm4_notify;
xdr_result = (xdrproc_t) xdr_void;
local = (bool_t (*) (char *, void *, struct svc_req *))nlm4_free_all_4_svc;
break;
default:
svcerr_noproc(rqstp);
svc_freereq(rqstp);
return;
}
(void) memset((char *)&argument, 0, sizeof (argument));
if (!svc_getargs(rqstp, xdr_argument, (char *)(caddr_t) &argument)) {
svcerr_decode(rqstp);
svc_freereq(rqstp);
return;
}
retval = (bool_t) (*local)((char *)&argument, (void *)&result, rqstp);
if (retval > 0 && !svc_sendreply(rqstp, xdr_result, (char *)&result)) {
svcerr_systemerr(rqstp);
}
if (!svc_freeargs(rqstp, xdr_argument, (char *)(caddr_t) &argument)) {
printf("unable to free arguments");
//exit(1);
}
svc_freereq(rqstp);
if (!nlm_prog_4_freeresult(transp, xdr_result, (caddr_t) &result))
printf("unable to free results");
return;
}
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