udf: Export superblock magic to userspace

Currently UDF superblock magic doesn't appear in any userspace header
files and thus userspace apps have hard time checking for this fs. Let's
export the magic to userspace as with any other filesystem.

Signed-off-by: Jan Kara <jack@suse.cz>

diff --git a/fs/udf/udf_sb.h b/fs/udf/udf_sb.h
index 1f32c7b..27b5335 100644 (file)
--- a/fs/udf/udf_sb.h
+++ b/fs/udf/udf_sb.h
@@ -3,9 +3,7 @@
 
 #include <linux/mutex.h>
 #include <linux/bitops.h>
-
-/* Since UDF 2.01 is ISO 13346 based... */
-#define UDF_SUPER_MAGIC                        0x15013346
+#include <linux/magic.h>
 
 #define UDF_MAX_READ_VERSION           0x0250
 #define UDF_MAX_WRITE_VERSION          0x0201

diff --git a/include/uapi/linux/magic.h b/include/uapi/linux/magic.h
index 0de181a..546b388 100644 (file)
--- a/include/uapi/linux/magic.h
+++ b/include/uapi/linux/magic.h
@@ -78,5 +78,7 @@
 #define BTRFS_TEST_MAGIC       0x73727279
 #define NSFS_MAGIC             0x6e736673
 #define BPF_FS_MAGIC           0xcafe4a11
+/* Since UDF 2.01 is ISO 13346 based... */
+#define UDF_SUPER_MAGIC                0x15013346
 
 #endif /* __LINUX_MAGIC_H__ */