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| author | John Garry <john.g.garry@oracle.com> | 2025-01-16 20:02:56 +0300 |
|---|---|---|
| committer | Mikulas Patocka <mpatocka@redhat.com> | 2025-01-18 00:23:47 +0300 |
| commit | 3194e36488e2dae05f9a822c73eaa367e47b2e3d (patch) | |
| tree | eb2c2089c158123926c2fdfd067903421435a663 /include/linux | |
| parent | a38425935f7886cef5fe04c796f36715e9d0ef3f (diff) | |
| download | linux-3194e36488e2dae05f9a822c73eaa367e47b2e3d.tar.xz | |
dm-table: atomic writes support
Support stacking atomic write limits for DM devices.
All the pre-existing code in blk_stack_atomic_writes_limits() already takes
care of finding the aggregrate limits from the bottom devices.
Feature flag DM_TARGET_ATOMIC_WRITES is introduced so that atomic writes
can be enabled on personalities selectively. This is to ensure that atomic
writes are only enabled when verified to be working properly (for a
specific personality). In addition, it just may not make sense to enable
atomic writes on some personalities (so this flag also helps there).
Signed-off-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Mike Snitzer <snitzer@kernel.org>
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/device-mapper.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h index 8321f65897f3..bcc6d7b69470 100644 --- a/include/linux/device-mapper.h +++ b/include/linux/device-mapper.h @@ -299,6 +299,9 @@ struct target_type { #define dm_target_supports_mixed_zoned_model(type) (false) #endif +#define DM_TARGET_ATOMIC_WRITES 0x00000400 +#define dm_target_supports_atomic_writes(type) ((type)->features & DM_TARGET_ATOMIC_WRITES) + struct dm_target { struct dm_table *table; struct target_type *type; |