#include <linux/mutex.h>
#include <linux/freezer.h>
#include <linux/kthread.h>
+#include <linux/sunrpc/svcauth_gss.h>
#include <net/inet_sock.h>
static const int nfs_set_port_min = 0;
static const int nfs_set_port_max = 65535;
+/*
+ * If the kernel has IPv6 support available, always listen for
+ * both AF_INET and AF_INET6 requests.
+ */
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+static const sa_family_t nfs_callback_family = AF_INET6;
+#else
+static const sa_family_t nfs_callback_family = AF_INET;
+#endif
+
static int param_set_port(const char *val, struct kernel_param *kp)
{
char *endp;
if (nfs_callback_info.users++ || nfs_callback_info.task != NULL)
goto out;
serv = svc_create(&nfs4_callback_program, NFS4_CALLBACK_BUFSIZE,
- AF_INET, NULL);
+ nfs_callback_family, NULL);
ret = -ENOMEM;
if (!serv)
goto out_err;
if (ret <= 0)
goto out_err;
nfs_callback_tcpport = ret;
- dprintk("Callback port = 0x%x\n", nfs_callback_tcpport);
+ dprintk("NFS: Callback listener port = %u (af %u)\n",
+ nfs_callback_tcpport, nfs_callback_family);
nfs_callback_info.rqst = svc_prepare_thread(serv, &serv->sv_pools[0]);
if (IS_ERR(nfs_callback_info.rqst)) {
mutex_unlock(&nfs_callback_mutex);
return ret;
out_err:
- dprintk("Couldn't create callback socket or server thread; err = %d\n",
- ret);
+ dprintk("NFS: Couldn't create callback socket or server thread; "
+ "err = %d\n", ret);
nfs_callback_info.users--;
goto out;
}
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);
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;
}
/*