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rpc: allow gss callbacks to client

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This patch adds client-side support to allow for callbacks other than
AUTH_SYS.

Signed-off-by: Olga Kornievskaia <aglo@citi.umich.edu>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Olga Kornievskaia 2008-12-23 16:18:34 -05:00 committed by Trond Myklebust
parent 608207e888
commit 945b34a772
2 changed files with 32 additions and 5 deletions
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36
fs/nfs/callback.c
View file

@ -16,6 +16,7 @@
#include <linux/mutex.h>
#include <linux/freezer.h>
#include <linux/kthread.h>
#include <linux/sunrpc/svcauth_gss.h>
#include <net/inet_sock.h>
@ -182,10 +183,34 @@ void nfs_callback_down(void)
mutex_unlock(&nfs_callback_mutex);
}
static int check_gss_callback_principal(struct nfs_client *clp,
struct svc_rqst *rqstp)
{
struct rpc_clnt *r = clp->cl_rpcclient;
char *p = svc_gss_principal(rqstp);
/*
* It might just be a normal user principal, in which case
* userspace won't bother to tell us the name at all.
*/
if (p == NULL)
return SVC_DENIED;
/* Expect a GSS_C_NT_HOSTBASED_NAME like "nfs@serverhostname" */
if (memcmp(p, "nfs@", 4) != 0)
return SVC_DENIED;
p += 4;
if (strcmp(p, r->cl_server) != 0)
return SVC_DENIED;
return SVC_OK;
}
static int nfs_callback_authenticate(struct svc_rqst *rqstp)
{
struct nfs_client *clp;
RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]);
int ret = SVC_OK;
/* Don't talk to strangers */
clp = nfs_find_client(svc_addr(rqstp), 4);
@ -194,21 +219,22 @@ static int nfs_callback_authenticate(struct svc_rqst *rqstp)
dprintk("%s: %s NFSv4 callback!\n", __func__,
svc_print_addr(rqstp, buf, sizeof(buf)));
nfs_put_client(clp);
switch (rqstp->rq_authop->flavour) {
case RPC_AUTH_NULL:
if (rqstp->rq_proc != CB_NULL)
return SVC_DENIED;
ret = SVC_DENIED;
break;
case RPC_AUTH_UNIX:
break;
case RPC_AUTH_GSS:
/* FIXME: RPCSEC_GSS handling? */
ret = check_gss_callback_principal(clp, rqstp);
break;
default:
return SVC_DENIED;
ret = SVC_DENIED;
}
return SVC_OK;
nfs_put_client(clp);
return ret;
}
/*

1
net/sunrpc/auth_gss/svcauth_gss.c
View file

@ -935,6 +935,7 @@ char *svc_gss_principal(struct svc_rqst *rqstp)
return gd->rsci->client_name;
return NULL;
}
EXPORT_SYMBOL_GPL(svc_gss_principal);
static int
svcauth_gss_set_client(struct svc_rqst *rqstp)