4.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Ilya Dryomov <idryomov@xxxxxxxxx> commit e573427a440fd67d3f522357d7ac901d59281948 upstream. 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@xxxxxxxxxxxxxxx Signed-off-by: Ilya Dryomov <idryomov@xxxxxxxxx> Reviewed-by: Jason Dillaman <dillaman@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/block/rbd.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -124,11 +124,13 @@ static int atomic_dec_return_safe(atomic #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. */