Currently the implementation only supports amending the encryption
options, unlike the qemu-img version
Signed-off-by: Maxim Levitsky
---
block/qcow2.c| 39 +++
qapi/block-core.json | 16 +++-
2 files changed, 54 insertions(+), 1 deletion(-)
diff --git a/block/qcow2.c b/block/qcow2.c
index 1b01174aed..8b74471bc6 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -5444,6 +5444,44 @@ static int qcow2_amend_options(BlockDriverState *bs,
QemuOpts *opts,
return 0;
}
+static int coroutine_fn qcow2_co_amend(BlockDriverState *bs,
+ BlockdevAmendOptions *opts,
+ bool force,
+ Error **errp)
+{
+BlockdevAmendOptionsQcow2 *qopts = &opts->u.qcow2;
+BDRVQcow2State *s = bs->opaque;
+int ret = 0;
+
+if (qopts->has_encrypt) {
+if (!s->crypto) {
+error_setg(errp, "image is not encrypted, can't amend");
+return -EOPNOTSUPP;
+}
+
+if (qopts->encrypt->format != Q_CRYPTO_BLOCK_FORMAT_LUKS) {
+error_setg(errp,
+ "Amend can't be used to change the qcow2 encryption
format");
+return -EOPNOTSUPP;
+}
+
+if (s->crypt_method_header != QCOW_CRYPT_LUKS) {
+error_setg(errp,
+ "Only LUKS encryption options can be amended for qcow2
with blockdev-amend");
+return -EOPNOTSUPP;
+}
+
+ret = qcrypto_block_amend_options(s->crypto,
+ qcow2_crypto_hdr_read_func,
+ qcow2_crypto_hdr_write_func,
+ bs,
+ qopts->encrypt,
+ force,
+ errp);
+}
+return ret;
+}
+
/*
* If offset or size are negative, respectively, they will not be included in
* the BLOCK_IMAGE_CORRUPTED event emitted.
@@ -5656,6 +5694,7 @@ BlockDriver bdrv_qcow2 = {
.mutable_opts= mutable_opts,
.bdrv_co_check = qcow2_co_check,
.bdrv_amend_options = qcow2_amend_options,
+.bdrv_co_amend = qcow2_co_amend,
.bdrv_detach_aio_context = qcow2_detach_aio_context,
.bdrv_attach_aio_context = qcow2_attach_aio_context,
diff --git a/qapi/block-core.json b/qapi/block-core.json
index 790aa40991..2cf1f443e5 100644
--- a/qapi/block-core.json
+++ b/qapi/block-core.json
@@ -4755,6 +4755,19 @@
'data': { }
}
+##
+# @BlockdevAmendOptionsQcow2:
+#
+# Driver specific image amend options for qcow2.
+# For now, only encryption options can be amended
+#
+# @encrypt Encryption options to be amended
+#
+# Since: 5.0
+##
+{ 'struct': 'BlockdevAmendOptionsQcow2',
+ 'data': { '*encrypt': 'QCryptoBlockAmendOptions' } }
+
##
# @BlockdevAmendOptions:
#
@@ -4769,7 +4782,8 @@
'driver': 'BlockdevDriver' },
'discriminator': 'driver',
'data': {
- 'luks': 'BlockdevAmendOptionsLUKS' } }
+ 'luks': 'BlockdevAmendOptionsLUKS',
+ 'qcow2': 'BlockdevAmendOptionsQcow2' } }
##
# @x-blockdev-amend:
--
2.17.2
