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rbd: advertise support for RBD_FEATURE_DEEP_FLATTEN

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All copyups perform deep-copyup regardless of whether deep-flatten
feature is enabled.  The feature bit is used to ensure that image is
written to only by new-enough clients that always perform deep-copyup.

Signed-off-by: Ilya Dryomov <[email protected]>
This commit is contained in:
Ilya Dryomov 2019-02-25 18:55:38 +01:00
commit b9f6d447a6
1 changed files with 2 additions and 0 deletions
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2
drivers/block/rbd.c
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@ -115,12 +115,14 @@ static int atomic_dec_return_safe(atomic_t *v)
#define RBD_FEATURE_LAYERING (1ULL<<0)
#define RBD_FEATURE_STRIPINGV2 (1ULL<<1)
#define RBD_FEATURE_EXCLUSIVE_LOCK (1ULL<<2)
#define RBD_FEATURE_DEEP_FLATTEN (1ULL<<5)
#define RBD_FEATURE_DATA_POOL (1ULL<<7)
#define RBD_FEATURE_OPERATIONS (1ULL<<8)
#define RBD_FEATURES_ALL (RBD_FEATURE_LAYERING | \
RBD_FEATURE_STRIPINGV2 | \
RBD_FEATURE_EXCLUSIVE_LOCK | \
RBD_FEATURE_DEEP_FLATTEN | \
RBD_FEATURE_DATA_POOL | \
RBD_FEATURE_OPERATIONS)