diff options
| author | Konstantin Khlebnikov <khlebnikov@yandex-team.ru> | 2020-09-23 16:06:52 -0400 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2020-09-25 08:20:03 -0600 |
| commit | 6abc49468eeaad2dd481779906aaa29605139087 (patch) | |
| tree | bc4c7489f07e17a9b4328b6c135871811f541027 /include | |
| parent | 021a24460dc28e7412aecfae89f60e1847e685c0 (diff) | |
dm: add support for REQ_NOWAIT and enable it for linear target
Add DM target feature flag DM_TARGET_NOWAIT which advertises that
target works with REQ_NOWAIT bios.
Add dm_table_supports_nowait() and update dm_table_set_restrictions()
to set/clear QUEUE_FLAG_NOWAIT accordingly.
Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/device-mapper.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h index 93096e524e43..d6f8d4ba8d48 100644 --- a/include/linux/device-mapper.h +++ b/include/linux/device-mapper.h @@ -252,6 +252,12 @@ struct target_type { #define DM_TARGET_ZONED_HM 0x00000040 #define dm_target_supports_zoned_hm(type) ((type)->features & DM_TARGET_ZONED_HM) +/* + * A target handles REQ_NOWAIT + */ +#define DM_TARGET_NOWAIT 0x00000080 +#define dm_target_supports_nowait(type) ((type)->features & DM_TARGET_NOWAIT) + struct dm_target { struct dm_table *table; struct target_type *type; |