Merge branch 'upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/vitb/linux...

[powerpc.git] / include / linux / device-mapper.h

diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h
index 010c8c5..e3d1c33 100644 (file)
--- a/include/linux/device-mapper.h
+++ b/include/linux/device-mapper.h
@@ -171,6 +171,7 @@ int dm_wait_event(struct mapped_device *md, int event_nr);
 /*
  * Info functions.
  */
+const char *dm_device_name(struct mapped_device *md);
 struct gendisk *dm_disk(struct mapped_device *md);
 int dm_suspended(struct mapped_device *md);
 
@@ -227,5 +228,11 @@ void dm_table_event(struct dm_table *t);
  */
 int dm_swap_table(struct mapped_device *md, struct dm_table *t);
 
+/*
+ * Prepare a table for a device that will error all I/O.
+ * To make it active, call dm_suspend(), dm_swap_table() then dm_resume().
+ */
+int dm_create_error_table(struct dm_table **result, struct mapped_device *md);
+
 #endif /* __KERNEL__ */
 #endif /* _LINUX_DEVICE_MAPPER_H */