1f60bfd822
to head. I don't think the NFS client behaviour will change unless the new "minorversion=1" mount option is used. It includes basic NFSv4.1 support plus support for pNFS using the Files Layout only. All problems detecting during an NFSv4.1 Bakeathon testing event in June 2012 have been resolved in this code and it has been tested against the NFSv4.1 server available to me. Although not reviewed, I believe that kib@ has looked at it.
295 lines
7.3 KiB
C
295 lines
7.3 KiB
C
/*-
|
|
* Copyright (c) 1989, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* Rick Macklem at The University of Guelph.
|
|
*
|
|
* 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.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include "opt_kgssapi.h"
|
|
|
|
#include <fs/nfs/nfsport.h>
|
|
|
|
#include <rpc/rpc.h>
|
|
#include <rpc/rpcsec_gss.h>
|
|
#include <rpc/replay.h>
|
|
|
|
|
|
NFSDLOCKMUTEX;
|
|
|
|
extern SVCPOOL *nfscbd_pool;
|
|
|
|
static int nfs_cbproc(struct nfsrv_descript *, u_int32_t);
|
|
|
|
extern u_long sb_max_adj;
|
|
extern int nfs_numnfscbd;
|
|
extern int nfscl_debuglevel;
|
|
|
|
/*
|
|
* NFS client system calls for handling callbacks.
|
|
*/
|
|
|
|
/*
|
|
* Handles server to client callbacks.
|
|
*/
|
|
static void
|
|
nfscb_program(struct svc_req *rqst, SVCXPRT *xprt)
|
|
{
|
|
struct nfsrv_descript nd;
|
|
int cacherep, credflavor;
|
|
|
|
memset(&nd, 0, sizeof(nd));
|
|
if (rqst->rq_proc != NFSPROC_NULL &&
|
|
rqst->rq_proc != NFSV4PROC_CBCOMPOUND) {
|
|
svcerr_noproc(rqst);
|
|
svc_freereq(rqst);
|
|
return;
|
|
}
|
|
nd.nd_procnum = rqst->rq_proc;
|
|
nd.nd_flag = (ND_NFSCB | ND_NFSV4);
|
|
|
|
/*
|
|
* Note: we want rq_addr, not svc_getrpccaller for nd_nam2 -
|
|
* NFS_SRVMAXDATA uses a NULL value for nd_nam2 to detect TCP
|
|
* mounts.
|
|
*/
|
|
nd.nd_mrep = rqst->rq_args;
|
|
rqst->rq_args = NULL;
|
|
newnfs_realign(&nd.nd_mrep);
|
|
nd.nd_md = nd.nd_mrep;
|
|
nd.nd_dpos = mtod(nd.nd_md, caddr_t);
|
|
nd.nd_nam = svc_getrpccaller(rqst);
|
|
nd.nd_nam2 = rqst->rq_addr;
|
|
nd.nd_mreq = NULL;
|
|
nd.nd_cred = NULL;
|
|
|
|
NFSCL_DEBUG(1, "cbproc=%d\n",nd.nd_procnum);
|
|
if (nd.nd_procnum != NFSPROC_NULL) {
|
|
if (!svc_getcred(rqst, &nd.nd_cred, &credflavor)) {
|
|
svcerr_weakauth(rqst);
|
|
svc_freereq(rqst);
|
|
m_freem(nd.nd_mrep);
|
|
return;
|
|
}
|
|
|
|
/* For now, I don't care what credential flavor was used. */
|
|
#ifdef notyet
|
|
#ifdef MAC
|
|
mac_cred_associate_nfsd(nd.nd_cred);
|
|
#endif
|
|
#endif
|
|
cacherep = nfs_cbproc(&nd, rqst->rq_xid);
|
|
} else {
|
|
NFSMGET(nd.nd_mreq);
|
|
nd.nd_mreq->m_len = 0;
|
|
cacherep = RC_REPLY;
|
|
}
|
|
if (nd.nd_mrep != NULL)
|
|
m_freem(nd.nd_mrep);
|
|
|
|
if (nd.nd_cred != NULL)
|
|
crfree(nd.nd_cred);
|
|
|
|
if (cacherep == RC_DROPIT) {
|
|
if (nd.nd_mreq != NULL)
|
|
m_freem(nd.nd_mreq);
|
|
svc_freereq(rqst);
|
|
return;
|
|
}
|
|
|
|
if (nd.nd_mreq == NULL) {
|
|
svcerr_decode(rqst);
|
|
svc_freereq(rqst);
|
|
return;
|
|
}
|
|
|
|
if (nd.nd_repstat & NFSERR_AUTHERR) {
|
|
svcerr_auth(rqst, nd.nd_repstat & ~NFSERR_AUTHERR);
|
|
if (nd.nd_mreq != NULL)
|
|
m_freem(nd.nd_mreq);
|
|
} else if (!svc_sendreply_mbuf(rqst, nd.nd_mreq))
|
|
svcerr_systemerr(rqst);
|
|
else
|
|
NFSCL_DEBUG(1, "cbrep sent\n");
|
|
svc_freereq(rqst);
|
|
}
|
|
|
|
/*
|
|
* Check the cache and, optionally, do the RPC.
|
|
* Return the appropriate cache response.
|
|
*/
|
|
static int
|
|
nfs_cbproc(struct nfsrv_descript *nd, u_int32_t xid)
|
|
{
|
|
struct thread *td = curthread;
|
|
int cacherep;
|
|
|
|
if (nd->nd_nam2 == NULL)
|
|
nd->nd_flag |= ND_STREAMSOCK;
|
|
|
|
nfscl_docb(nd, td);
|
|
if (nd->nd_repstat == NFSERR_DONTREPLY)
|
|
cacherep = RC_DROPIT;
|
|
else
|
|
cacherep = RC_REPLY;
|
|
return (cacherep);
|
|
}
|
|
|
|
/*
|
|
* Adds a socket to the list for servicing by nfscbds.
|
|
*/
|
|
int
|
|
nfscbd_addsock(struct file *fp)
|
|
{
|
|
int siz;
|
|
struct socket *so;
|
|
int error;
|
|
SVCXPRT *xprt;
|
|
|
|
so = fp->f_data;
|
|
|
|
siz = sb_max_adj;
|
|
error = soreserve(so, siz, siz);
|
|
if (error)
|
|
return (error);
|
|
|
|
/*
|
|
* Steal the socket from userland so that it doesn't close
|
|
* unexpectedly.
|
|
*/
|
|
if (so->so_type == SOCK_DGRAM)
|
|
xprt = svc_dg_create(nfscbd_pool, so, 0, 0);
|
|
else
|
|
xprt = svc_vc_create(nfscbd_pool, so, 0, 0);
|
|
if (xprt) {
|
|
fp->f_ops = &badfileops;
|
|
fp->f_data = NULL;
|
|
svc_reg(xprt, NFS_CALLBCKPROG, NFSV4_CBVERS, nfscb_program,
|
|
NULL);
|
|
SVC_RELEASE(xprt);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Called by nfssvc() for nfscbds. Just loops around servicing rpc requests
|
|
* until it is killed by a signal.
|
|
*
|
|
* For now, only support callbacks via RPCSEC_GSS if there is a KerberosV
|
|
* keytab entry with a host based entry in it on the client. (I'm not even
|
|
* sure that getting Acceptor credentials for a user principal with a
|
|
* credentials cache is possible, but even if it is, major changes to the
|
|
* kgssapi would be required.)
|
|
* I don't believe that this is a serious limitation since, as of 2009, most
|
|
* NFSv4 servers supporting callbacks are using AUTH_SYS for callbacks even
|
|
* when the client is using RPCSEC_GSS. (This BSD server uses AUTH_SYS
|
|
* for callbacks unless nfsrv_gsscallbackson is set non-zero.)
|
|
*/
|
|
int
|
|
nfscbd_nfsd(struct thread *td, struct nfsd_nfscbd_args *args)
|
|
{
|
|
char principal[128];
|
|
int error;
|
|
|
|
if (args != NULL) {
|
|
error = copyinstr(args->principal, principal,
|
|
sizeof(principal), NULL);
|
|
if (error)
|
|
return (error);
|
|
} else {
|
|
principal[0] = '\0';
|
|
}
|
|
|
|
/*
|
|
* Only the first nfsd actually does any work. The RPC code
|
|
* adds threads to it as needed. Any extra processes offered
|
|
* by nfsd just exit. If nfsd is new enough, it will call us
|
|
* once with a structure that specifies how many threads to
|
|
* use.
|
|
*/
|
|
NFSD_LOCK();
|
|
if (nfs_numnfscbd == 0) {
|
|
nfs_numnfscbd++;
|
|
|
|
NFSD_UNLOCK();
|
|
|
|
if (principal[0] != '\0')
|
|
rpc_gss_set_svc_name_call(principal, "kerberosv5",
|
|
GSS_C_INDEFINITE, NFS_CALLBCKPROG, NFSV4_CBVERS);
|
|
|
|
nfscbd_pool->sp_minthreads = 4;
|
|
nfscbd_pool->sp_maxthreads = 4;
|
|
|
|
svc_run(nfscbd_pool);
|
|
|
|
rpc_gss_clear_svc_name_call(NFS_CALLBCKPROG, NFSV4_CBVERS);
|
|
|
|
NFSD_LOCK();
|
|
nfs_numnfscbd--;
|
|
nfsrvd_cbinit(1);
|
|
}
|
|
NFSD_UNLOCK();
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Initialize the data structures for the server.
|
|
* Handshake with any new nfsds starting up to avoid any chance of
|
|
* corruption.
|
|
*/
|
|
void
|
|
nfsrvd_cbinit(int terminating)
|
|
{
|
|
|
|
NFSD_LOCK_ASSERT();
|
|
|
|
if (terminating) {
|
|
/* Wait for any xprt registrations to complete. */
|
|
while (nfs_numnfscbd > 0)
|
|
msleep(&nfs_numnfscbd, NFSDLOCKMUTEXPTR, PZERO,
|
|
"nfscbdt", 0);
|
|
NFSD_UNLOCK();
|
|
svcpool_destroy(nfscbd_pool);
|
|
nfscbd_pool = NULL;
|
|
} else
|
|
NFSD_UNLOCK();
|
|
|
|
nfscbd_pool = svcpool_create("nfscbd", NULL);
|
|
nfscbd_pool->sp_rcache = NULL;
|
|
nfscbd_pool->sp_assign = NULL;
|
|
nfscbd_pool->sp_done = NULL;
|
|
|
|
NFSD_LOCK();
|
|
}
|
|
|