dm: support key eviction from keyslot managers of underlying devices
Now that device mapper supports inline encryption, add the ability to
evict keys from all underlying devices. When an upper layer requests
a key eviction, we simply iterate through all underlying devices
and evict that key from each device.
Co-developed-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Satya Tangirala <satyat@google.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
diff --git a/block/blk-crypto.c b/block/blk-crypto.c
index 09fcb18..c5bdaaf 100644
--- a/block/blk-crypto.c
+++ b/block/blk-crypto.c
@@ -409,3 +409,4 @@ int blk_crypto_evict_key(struct request_queue *q,
*/
return blk_crypto_fallback_evict_key(key);
}
+EXPORT_SYMBOL_GPL(blk_crypto_evict_key);