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Commit e573427a authored by Ilya Dryomov's avatar Ilya Dryomov
Browse files

rbd: whitelist RBD_FEATURE_OPERATIONS feature bit 



This feature bit restricts older clients from performing certain
maintenance operations against an image (e.g. clone, snap create).
krbd does not perform maintenance operations.

Cc: stable@vger.kernel.org
Signed-off-by: default avatarIlya Dryomov <idryomov@gmail.com>
Reviewed-by: default avatarJason Dillaman <dillaman@redhat.com>
parent d98f153f

drivers/block/rbd.c

+3 −1
Original line number Diff line number Diff line
@@ -124,11 +124,13 @@ static int atomic_dec_return_safe(atomic_t *v) 
#define RBD_FEATURE_STRIPINGV2		(1ULL<<1)

#define RBD_FEATURE_EXCLUSIVE_LOCK	(1ULL<<2)

#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_DATA_POOL)

				 RBD_FEATURE_DATA_POOL |	\

				 RBD_FEATURE_OPERATIONS)



/* Features supported by this (client software) implementation. */