diff options
Diffstat (limited to 'include/linux/device-mapper.h')
| -rw-r--r-- | include/linux/device-mapper.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h index cc58e2d7c032..98f34b886f95 100644 --- a/include/linux/device-mapper.h +++ b/include/linux/device-mapper.h @@ -173,6 +173,13 @@ struct target_type { #define dm_target_always_writeable(type) \ ((type)->features & DM_TARGET_ALWAYS_WRITEABLE) +/* + * Any device that contains a table with an instance of this target may never + * have tables containing any different target type. + */ +#define DM_TARGET_IMMUTABLE 0x00000004 +#define dm_target_is_immutable(type) ((type)->features & DM_TARGET_IMMUTABLE) + struct dm_target { struct dm_table *table; struct target_type *type; |