[v3 04/10] crypto: Introduce creation option and structure for detached LUKS header

[Hyman Huang]

Introduce 'header' field in BlockdevCreateOptionsLUKS to support
detached LUKS header creation. Meanwhile, introduce header-related
field in QCryptoBlock.

Signed-off-by: Hyman Huang <yong.huang@smartx.com>
---
 crypto/blockpriv.h   | 3 +++
 qapi/block-core.json | 3 +++
 qapi/crypto.json     | 5 ++++-
 3 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/crypto/blockpriv.h b/crypto/blockpriv.h
index 3c7ccea504..6289aea961 100644
--- a/crypto/blockpriv.h
+++ b/crypto/blockpriv.h
@@ -42,6 +42,9 @@ struct QCryptoBlock {
     size_t niv;
     uint64_t payload_offset; /* In bytes */
     uint64_t sector_size; /* In bytes */
+
+    bool detached_header; /* True if disk has a detached LUKS header */
+    uint64_t detached_header_size; /* LUKS header size plus key slot size */
 };
 
 struct QCryptoBlockDriver {
diff --git a/qapi/block-core.json b/qapi/block-core.json
index 9ac256c489..8aec179926 100644
--- a/qapi/block-core.json
+++ b/qapi/block-core.json
@@ -4948,6 +4948,8 @@
 # @file: Node to create the image format on, mandatory except when
 #        'preallocation' is not requested
 #
+# @header: Detached LUKS header node to format. (since 9.0)
+#
 # @size: Size of the virtual disk in bytes
 #
 # @preallocation: Preallocation mode for the new image (since: 4.2)
@@ -4958,6 +4960,7 @@
 { 'struct': 'BlockdevCreateOptionsLUKS',
   'base': 'QCryptoBlockCreateOptionsLUKS',
   'data': { '*file':            'BlockdevRef',
+            '*header':          'BlockdevRef',
             'size':             'size',
             '*preallocation':   'PreallocMode' } }
 
diff --git a/qapi/crypto.json b/qapi/crypto.json
index fd3d46ebd1..6b4e86cb81 100644
--- a/qapi/crypto.json
+++ b/qapi/crypto.json
@@ -195,10 +195,13 @@
 #     decryption key.  Mandatory except when probing image for
 #     metadata only.
 #
+# @detached-header: if true, disk has detached LUKS header.
+#
 # Since: 2.6
 ##
 { 'struct': 'QCryptoBlockOptionsLUKS',
-  'data': { '*key-secret': 'str' }}
+  'data': { '*key-secret': 'str',
+            '*detached-header': 'bool' }}
 
 ##
 # @QCryptoBlockCreateOptionsLUKS:
-- 
2.39.1