Module blkdev 

Block device ioctls: BLKGETSIZE64, BLKDISCARD

Standard Linux block device ioctls that are not btrfs-specific but are needed for device preparation (e.g. querying device size, issuing TRIM).

Functions

blk_discard^⚠

blk_getsize64^⚠

device_size

Get the size of a block device in bytes.

discard_range

Issue a BLKDISCARD (TRIM) on the given byte range of a block device.

discard_whole_device

Issue a BLKDISCARD on the entire block device.