diff options
| author | Heinz Mauelshagen <heinzm@redhat.com> | 2020-03-09 23:26:38 +0100 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2020-05-15 10:29:35 -0400 |
| commit | d3c7b35c20d60650bac8b55c17b194adda03a979 (patch) | |
| tree | 5a03d63bbf92aa6c5296163edd4612177397ba96 /drivers/md/Kconfig | |
| parent | 2361ae595352dec015d14292f1b539242d8446d6 (diff) | |
dm: add emulated block size target
This new target is similar to the linear target except that it emulates
a smaller logical block size on a device with a larger logical block
size. Its main purpose is to emulate 512 byte sectors on 4K native
disks (i.e. 512e).
See Documentation/admin-guide/device-mapper/dm-ebs.rst for details.
Reviewed-by: Damien Le Moal <DamienLeMoal@wdc.com>
Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com>
Signed-off-by: Randy Dunlap <rdunlap@infradead.org> [Kconfig fixes]
Signed-off-by: Zheng Bin <zhengbin13@huawei.com> [static fixes]
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md/Kconfig')
| -rw-r--r-- | drivers/md/Kconfig | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/md/Kconfig b/drivers/md/Kconfig index 8b0c646d2f59..6cb6188a61df 100644 --- a/drivers/md/Kconfig +++ b/drivers/md/Kconfig @@ -337,6 +337,14 @@ config DM_WRITECACHE The writecache target doesn't cache reads because reads are supposed to be cached in standard RAM. +config DM_EBS + tristate "Emulated block size target (EXPERIMENTAL)" + depends on BLK_DEV_DM + select DM_BUFIO + help + dm-ebs emulates smaller logical block size on backing devices + with larger ones (e.g. 512 byte sectors on 4K native disks). + config DM_ERA tristate "Era target (EXPERIMENTAL)" depends on BLK_DEV_DM |