diff options
| author | Mike Snitzer <snitzer@kernel.org> | 2023-03-01 12:48:43 -0500 |
|---|---|---|
| committer | Mike Snitzer <snitzer@kernel.org> | 2023-03-30 15:57:50 -0400 |
| commit | 06961c487a33a222fd3d84998dc6398ed0449373 (patch) | |
| tree | ce2512c7db900e8f3a92fc1e13502162701ba079 /include/linux/device-mapper.h | |
| parent | bb46c56165faf284cf42c197317bff24f899835a (diff) | |
dm: split discards further if target sets max_discard_granularity
The block core (bio_split_discard) will already split discards based
on the 'discard_granularity' and 'max_discard_sectors' queue_limits.
But the DM thin target also needs to ensure that it doesn't receive a
discard that spans a 'max_discard_sectors' boundary.
Introduce a dm_target 'max_discard_granularity' flag that if set will
cause DM core to split discard bios relative to 'max_discard_sectors'.
This treats 'discard_granularity' as a "min_discard_granularity" and
'max_discard_sectors' as a "max_discard_granularity".
Requested-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Diffstat (limited to 'include/linux/device-mapper.h')
| -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 7975483816e4..8aa6b3ea91fa 100644 --- a/include/linux/device-mapper.h +++ b/include/linux/device-mapper.h @@ -359,6 +359,12 @@ struct dm_target { bool discards_supported:1; /* + * Set if this target requires that discards be split on both + * 'discard_granularity' and 'max_discard_sectors' boundaries. + */ + bool max_discard_granularity:1; + + /* * Set if we need to limit the number of in-flight bios when swapping. */ bool limit_swap_bios:1; |