NFSv4: Allow user to set the port used by the NFSv4 callback channel
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 7270b1d..648cb1a 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -40,6 +40,7 @@
#include <asm/uaccess.h>
#include "nfs4_fs.h"
+#include "callback.h"
#include "delegation.h"
#define NFSDBG_FACILITY NFSDBG_VFS
@@ -2036,6 +2037,21 @@
.fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
};
+static const int nfs_set_port_min = 0;
+static const int nfs_set_port_max = 65535;
+static int param_set_port(const char *val, struct kernel_param *kp)
+{
+ char *endp;
+ int num = simple_strtol(val, &endp, 0);
+ if (endp == val || *endp || num < nfs_set_port_min || num > nfs_set_port_max)
+ return -EINVAL;
+ *((int *)kp->arg) = num;
+ return 0;
+}
+
+module_param_call(callback_tcpport, param_set_port, param_get_int,
+ &nfs_callback_set_tcpport, 0644);
+
#define nfs4_init_once(nfsi) \
do { \
INIT_LIST_HEAD(&(nfsi)->open_states); \
@@ -2043,8 +2059,25 @@
nfsi->delegation_state = 0; \
init_rwsem(&nfsi->rwsem); \
} while(0)
-#define register_nfs4fs() register_filesystem(&nfs4_fs_type)
-#define unregister_nfs4fs() unregister_filesystem(&nfs4_fs_type)
+
+static inline int register_nfs4fs(void)
+{
+ int ret;
+
+ ret = nfs_register_sysctl();
+ if (ret != 0)
+ return ret;
+ ret = register_filesystem(&nfs4_fs_type);
+ if (ret != 0)
+ nfs_unregister_sysctl();
+ return ret;
+}
+
+static inline void unregister_nfs4fs(void)
+{
+ unregister_filesystem(&nfs4_fs_type);
+ nfs_unregister_sysctl();
+}
#else
#define nfs4_init_once(nfsi) \
do { } while (0)