crypto: add support for querying parameters for block encryption
When creating new block encryption volumes, we accept a list of
parameters to control the formatting process. It is useful to
be able to query what those parameters were for existing block
devices. Add a qcrypto_block_get_info() method which returns a
QCryptoBlockInfo instance to report this data.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Message-id: 1469192015-16487-2-git-send-email-berrange@redhat.com
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
diff --git a/crypto/block.c b/crypto/block.c
index da60eba..be823ee 100644
--- a/crypto/block.c
+++ b/crypto/block.c
@@ -105,6 +105,23 @@
}
+QCryptoBlockInfo *qcrypto_block_get_info(QCryptoBlock *block,
+ Error **errp)
+{
+ QCryptoBlockInfo *info = g_new0(QCryptoBlockInfo, 1);
+
+ info->format = block->format;
+
+ if (block->driver->get_info &&
+ block->driver->get_info(block, info, errp) < 0) {
+ g_free(info);
+ return NULL;
+ }
+
+ return info;
+}
+
+
int qcrypto_block_decrypt(QCryptoBlock *block,
uint64_t startsector,
uint8_t *buf,
