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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: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Jason Dillaman <dillaman@redhat.com>
zero-colors
Ilya Dryomov 2018-01-16 15:41:54 +01:00
parent d98f153f1a
commit e573427a44
1 changed files with 3 additions and 1 deletions
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4
drivers/block/rbd.c
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@ -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. */