• Martin K. Petersen's avatar
    block: Implement support for WRITE SAME · 4363ac7c
    Martin K. Petersen authored
    The WRITE SAME command supported on some SCSI devices allows the same
    block to be efficiently replicated throughout a block range. Only a
    single logical block is transferred from the host and the storage device
    writes the same data to all blocks described by the I/O.
    This patch implements support for WRITE SAME in the block layer. The
    blkdev_issue_write_same() function can be used by filesystems and block
    drivers to replicate a buffer across a block range. This can be used to
    efficiently initialize software RAID devices, etc.
    Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
    Acked-by: default avatarMike Snitzer <snitzer@redhat.com>
    Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
blk-settings.c 26.3 KB