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Commit b9f6d447 authored by Ilya Dryomov's avatar Ilya Dryomov
Browse files

rbd: advertise support for RBD_FEATURE_DEEP_FLATTEN 



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: default avatarIlya Dryomov <idryomov@gmail.com>
parent 9b17eb2c

drivers/block/rbd.c

+2 −0
Original line number Diff line number Diff line
@@ -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)