/*
* Marshal credentials.
* Maybe we should keep a cached credential for performance reasons.
*/
static int
unx_marshal(struct rpc_task *task, struct xdr_stream *xdr)
{
struct rpc_clnt *clnt = task->tk_client;
struct rpc_cred *cred = task->tk_rqstp->rq_cred;
__be32 *p, *cred_len, *gidarr_len;
int i;
struct group_info *gi = cred->cr_cred->group_info;
/* Credential */
p = xdr_reserve_space(xdr, 3 * sizeof(*p));
if (!p)
goto marshal_failed;
*p++ = rpc_auth_unix;
cred_len = p++;
*p++ = xdr_zero; /* stamp */
if (xdr_stream_encode_opaque(xdr, clnt->cl_nodename,
clnt->cl_nodelen) < 0)
goto marshal_failed;
p = xdr_reserve_space(xdr, 3 * sizeof(*p));
if (!p)
goto marshal_failed;
*p++ = cpu_to_be32(from_kuid(&init_user_ns, cred->cr_cred->fsuid));
*p++ = cpu_to_be32(from_kgid(&init_user_ns, cred->cr_cred->fsgid));
gidarr_len = p++;
if (gi)
for (i = 0; i < UNX_NGROUPS && i < gi->ngroups; i++)
*p++ = cpu_to_be32(from_kgid(&init_user_ns,
gi->gid[i]));
*gidarr_len = cpu_to_be32(p - gidarr_len - 1);
*cred_len = cpu_to_be32((p - cred_len - 1) << 2);
p = xdr_reserve_space(xdr, (p - gidarr_len - 1) << 2);
if (!p)
goto marshal_failed;
/* Verifier */
p = xdr_reserve_space(xdr, 2 * sizeof(*p));
if (!p)
goto marshal_failed;
*p++ = rpc_auth_null;
*p = xdr_zero;
return 0;
marshal_failed:
return -EMSGSIZE;
}
static __be32 encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
{
if (unlikely(xdr_stream_encode_opaque(xdr, str, len) < 0))
return cpu_to_be32(NFS4ERR_RESOURCE);
return 0;
}
