diff options
Diffstat (limited to 'include/linux/device-mapper.h')
| -rw-r--r-- | include/linux/device-mapper.h | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h index 8321f65897f3..cb95951547ab 100644 --- a/include/linux/device-mapper.h +++ b/include/linux/device-mapper.h @@ -93,7 +93,14 @@ typedef void (*dm_status_fn) (struct dm_target *ti, status_type_t status_type, typedef int (*dm_message_fn) (struct dm_target *ti, unsigned int argc, char **argv, char *result, unsigned int maxlen); -typedef int (*dm_prepare_ioctl_fn) (struct dm_target *ti, struct block_device **bdev); +/* + * Called with *forward == true. If it remains true, the ioctl should be + * forwarded to bdev. If it is reset to false, the target already fully handled + * the ioctl and the return value is the return value for the whole ioctl. + */ +typedef int (*dm_prepare_ioctl_fn) (struct dm_target *ti, struct block_device **bdev, + unsigned int cmd, unsigned long arg, + bool *forward); #ifdef CONFIG_BLK_DEV_ZONED typedef int (*dm_report_zones_fn) (struct dm_target *ti, @@ -299,6 +306,9 @@ struct target_type { #define dm_target_supports_mixed_zoned_model(type) (false) #endif +#define DM_TARGET_ATOMIC_WRITES 0x00000400 +#define dm_target_supports_atomic_writes(type) ((type)->features & DM_TARGET_ATOMIC_WRITES) + struct dm_target { struct dm_table *table; struct target_type *type; |