ext4: Renumber EXT4_IOC_MIGRATE

Pick an ioctl number for EXT4_IOC_MIGRATE that won't conflict with
other ext4 ioctl's.  Since there haven't been any major userspace
users of this ioctl, we can afford to change this now, to avoid
potential problems later.

Also, reorder the ioctl numbers in ext4.h to avoid this sort of
mistake in the future.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 068adc1d5607a31449c7caa4d187d3e94c5c110f..50a4846c7e71c20f0ec0d14ed73a922936bf4fc2 100644 (file)
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -291,8 +291,6 @@ struct ext4_new_group_data {
 #define        EXT4_IOC_SETFLAGS               FS_IOC_SETFLAGS
 #define        EXT4_IOC_GETVERSION             _IOR('f', 3, long)
 #define        EXT4_IOC_SETVERSION             _IOW('f', 4, long)
-#define EXT4_IOC_GROUP_EXTEND          _IOW('f', 7, unsigned long)
-#define EXT4_IOC_GROUP_ADD             _IOW('f', 8, struct ext4_new_group_input)
 #define        EXT4_IOC_GETVERSION_OLD         FS_IOC_GETVERSION
 #define        EXT4_IOC_SETVERSION_OLD         FS_IOC_SETVERSION
 #ifdef CONFIG_JBD2_DEBUG
@@ -300,7 +298,10 @@ struct ext4_new_group_data {
 #endif
 #define EXT4_IOC_GETRSVSZ              _IOR('f', 5, long)
 #define EXT4_IOC_SETRSVSZ              _IOW('f', 6, long)
-#define EXT4_IOC_MIGRATE               _IO('f', 7)
+#define EXT4_IOC_GROUP_EXTEND          _IOW('f', 7, unsigned long)
+#define EXT4_IOC_GROUP_ADD             _IOW('f', 8, struct ext4_new_group_input)
+#define EXT4_IOC_MIGRATE               _IO('f', 9)
+ /* note ioctl 11 reserved for filesystem-independent FIEMAP ioctl */
 
 /*
  * ioctl commands in 32 bit emulation