libdiskfs: Simplify type checks.

* libdiskfs/diskfs.h (diskfs_begin_using_control_port): Check port class.
* libdiskfs/fsys-getfile.c (diskfs_S_fsys_getfile): Drop check.
* libdiskfs/fsys-getroot.c (diskfs_S_fsys_getroot): Likewise.
* libdiskfs/fsys-goaway.c (diskfs_S_fsys_goaway): Likewise.
* libdiskfs/fsys-options.c (diskfs_S_fsys_{s,g}et_options): Likewise.
* libdiskfs/fsys-syncfs.c (diskfs_S_fsys_syncfs): Likewise.

6 files changed, 13 insertions, 19 deletions

diff --git a/libdiskfs/diskfs.h b/libdiskfs/diskfs.h
index 402b65e5..0e148523 100644
--- a/libdiskfs/diskfs.h
+++ b/libdiskfs/diskfs.h
@@ -925,7 +925,7 @@ diskfs_begin_using_protid_payload (unsigned long payload)
 DISKFS_EXTERN_INLINE struct diskfs_control *
 diskfs_begin_using_control_port (fsys_t port)
 {
-  return ports_lookup_port (diskfs_port_bucket, port, NULL);
+  return ports_lookup_port (diskfs_port_bucket, port, diskfs_control_class);
 }
 
 DISKFS_EXTERN_INLINE struct diskfs_control *
@@ -933,7 +933,7 @@ diskfs_begin_using_control_port_payload (unsigned long payload)
 {
   return ports_lookup_payload (diskfs_port_bucket,
 			       payload,
-			       NULL);
+			       diskfs_control_class);
 }
 
 /* And for the exec_startup interface. */
diff --git a/libdiskfs/fsys-getfile.c b/libdiskfs/fsys-getfile.c
index 9dd5d732..e4dbe365 100644
--- a/libdiskfs/fsys-getfile.c
+++ b/libdiskfs/fsys-getfile.c
@@ -42,8 +42,7 @@ diskfs_S_fsys_getfile (struct diskfs_control *pt,
   struct peropen *new_po;
   struct iouser *user;
 
-  if (!pt
-      || pt->pi.class != diskfs_control_class)
+  if (!pt)
     return EOPNOTSUPP;
 
   if (handle_len != sizeof *f)
diff --git a/libdiskfs/fsys-getroot.c b/libdiskfs/fsys-getroot.c
index 6f93888f..735f359a 100644
--- a/libdiskfs/fsys-getroot.c
+++ b/libdiskfs/fsys-getroot.c
@@ -54,8 +54,7 @@ diskfs_S_fsys_getroot (struct diskfs_control *pt,
     path: NULL,
   };
 
-  if (!pt
-      || pt->pi.class != diskfs_control_class)
+  if (!pt)
     return EOPNOTSUPP;
 
   flags &= O_HURD;
diff --git a/libdiskfs/fsys-goaway.c b/libdiskfs/fsys-goaway.c
index 9b641954..f716970c 100644
--- a/libdiskfs/fsys-goaway.c
+++ b/libdiskfs/fsys-goaway.c
@@ -31,13 +31,12 @@ diskfs_S_fsys_goaway (struct diskfs_control *pt,
 		      int flags)
 {
   error_t ret;
-  
-  if (!pt
-      || pt->pi.class != diskfs_control_class)
+
+  if (!pt)
     return EOPNOTSUPP;
-  
+
   /* XXX FSYS_GOAWAY_NOWAIT not implemented. */
-  
+
   ret = diskfs_shutdown (flags);
 
   if (ret == 0)
diff --git a/libdiskfs/fsys-options.c b/libdiskfs/fsys-options.c
index b366d143..f676ed07 100644
--- a/libdiskfs/fsys-options.c
+++ b/libdiskfs/fsys-options.c
@@ -58,8 +58,7 @@ diskfs_S_fsys_set_options (struct diskfs_control *pt,
 	return error;
       }
 
-  if (!pt
-      || pt->pi.class != diskfs_control_class)
+  if (!pt)
     return EOPNOTSUPP;
 
   if (do_children)
@@ -90,8 +89,7 @@ diskfs_S_fsys_get_options (struct diskfs_control *port,
   size_t argz_len = 0;
   error_t err;
 
-  if (!port
-      || port->pi.class != diskfs_control_class)
+  if (!port)
     return EOPNOTSUPP;
 
   err = argz_add (&argz, &argz_len, program_invocation_name);
diff --git a/libdiskfs/fsys-syncfs.c b/libdiskfs/fsys-syncfs.c
index 4dceed7f..17b83ee0 100644
--- a/libdiskfs/fsys-syncfs.c
+++ b/libdiskfs/fsys-syncfs.c
@@ -46,11 +46,10 @@ diskfs_S_fsys_syncfs (struct diskfs_control *pi,
 	pthread_mutex_lock (&np->lock);
 	return 0;
       }
-  
-  if (!pi
-      || pi->pi.class != diskfs_control_class)
+
+  if (!pi)
     return EOPNOTSUPP;
-  
+
   pthread_rwlock_rdlock (&diskfs_fsys_lock);
 
   if (children)