block/amend: separate amend and create options for qemu-img

Some options are only useful for creation
(or hard to be amended, like cluster size for qcow2), while some other
options are only useful for amend, like upcoming keyslot management
options for luks

Since currently only qcow2 supports amend, move all its options
to a common macro and then include it in each action option list.

In future it might be useful to remove some options which are
not supported anyway from amend list, which currently
cause an error message if amended.

Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200608094030.670121-5-mlevitsk@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>

1 files changed, 94 insertions, 79 deletions

diff --git a/block/qcow2.c b/block/qcow2.c
index f6c9207312..3898853ef8 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -5660,89 +5660,103 @@ void qcow2_signal_corruption(BlockDriverState *bs, bool fatal, int64_t offset,
     s->signaled_corruption = true;
 }
 
+#define QCOW_COMMON_OPTIONS                                         \
+    {                                                               \
+        .name = BLOCK_OPT_SIZE,                                     \
+        .type = QEMU_OPT_SIZE,                                      \
+        .help = "Virtual disk size"                                 \
+    },                                                              \
+    {                                                               \
+        .name = BLOCK_OPT_COMPAT_LEVEL,                             \
+        .type = QEMU_OPT_STRING,                                    \
+        .help = "Compatibility level (v2 [0.10] or v3 [1.1])"       \
+    },                                                              \
+    {                                                               \
+        .name = BLOCK_OPT_BACKING_FILE,                             \
+        .type = QEMU_OPT_STRING,                                    \
+        .help = "File name of a base image"                         \
+    },                                                              \
+    {                                                               \
+        .name = BLOCK_OPT_BACKING_FMT,                              \
+        .type = QEMU_OPT_STRING,                                    \
+        .help = "Image format of the base image"                    \
+    },                                                              \
+    {                                                               \
+        .name = BLOCK_OPT_DATA_FILE,                                \
+        .type = QEMU_OPT_STRING,                                    \
+        .help = "File name of an external data file"                \
+    },                                                              \
+    {                                                               \
+        .name = BLOCK_OPT_DATA_FILE_RAW,                            \
+        .type = QEMU_OPT_BOOL,                                      \
+        .help = "The external data file must stay valid "           \
+                "as a raw image"                                    \
+    },                                                              \
+    {                                                               \
+        .name = BLOCK_OPT_ENCRYPT,                                  \
+        .type = QEMU_OPT_BOOL,                                      \
+        .help = "Encrypt the image with format 'aes'. (Deprecated " \
+                "in favor of " BLOCK_OPT_ENCRYPT_FORMAT "=aes)",    \
+    },                                                              \
+    {                                                               \
+        .name = BLOCK_OPT_ENCRYPT_FORMAT,                           \
+        .type = QEMU_OPT_STRING,                                    \
+        .help = "Encrypt the image, format choices: 'aes', 'luks'", \
+    },                                                              \
+    BLOCK_CRYPTO_OPT_DEF_KEY_SECRET("encrypt.",                     \
+        "ID of secret providing qcow AES key or LUKS passphrase"),  \
+    BLOCK_CRYPTO_OPT_DEF_LUKS_CIPHER_ALG("encrypt."),               \
+    BLOCK_CRYPTO_OPT_DEF_LUKS_CIPHER_MODE("encrypt."),              \
+    BLOCK_CRYPTO_OPT_DEF_LUKS_IVGEN_ALG("encrypt."),                \
+    BLOCK_CRYPTO_OPT_DEF_LUKS_IVGEN_HASH_ALG("encrypt."),           \
+    BLOCK_CRYPTO_OPT_DEF_LUKS_HASH_ALG("encrypt."),                 \
+    BLOCK_CRYPTO_OPT_DEF_LUKS_ITER_TIME("encrypt."),                \
+    {                                                               \
+        .name = BLOCK_OPT_CLUSTER_SIZE,                             \
+        .type = QEMU_OPT_SIZE,                                      \
+        .help = "qcow2 cluster size",                               \
+        .def_value_str = stringify(DEFAULT_CLUSTER_SIZE)            \
+    },                                                              \
+    {                                                               \
+        .name = BLOCK_OPT_PREALLOC,                                 \
+        .type = QEMU_OPT_STRING,                                    \
+        .help = "Preallocation mode (allowed values: off, "         \
+                "metadata, falloc, full)"                           \
+    },                                                              \
+    {                                                               \
+        .name = BLOCK_OPT_LAZY_REFCOUNTS,                           \
+        .type = QEMU_OPT_BOOL,                                      \
+        .help = "Postpone refcount updates",                        \
+        .def_value_str = "off"                                      \
+    },                                                              \
+    {                                                               \
+        .name = BLOCK_OPT_REFCOUNT_BITS,                            \
+        .type = QEMU_OPT_NUMBER,                                    \
+        .help = "Width of a reference count entry in bits",         \
+        .def_value_str = "16"                                       \
+    },                                                              \
+    {                                                               \
+        .name = BLOCK_OPT_COMPRESSION_TYPE,                         \
+        .type = QEMU_OPT_STRING,                                    \
+        .help = "Compression method used for image cluster "        \
+                "compression",                                      \
+        .def_value_str = "zlib"                                     \
+    }
+
 static QemuOptsList qcow2_create_opts = {
     .name = "qcow2-create-opts",
     .head = QTAILQ_HEAD_INITIALIZER(qcow2_create_opts.head),
     .desc = {
-        {
-            .name = BLOCK_OPT_SIZE,
-            .type = QEMU_OPT_SIZE,
-            .help = "Virtual disk size"
-        },
-        {
-            .name = BLOCK_OPT_COMPAT_LEVEL,
-            .type = QEMU_OPT_STRING,
-            .help = "Compatibility level (v2 [0.10] or v3 [1.1])"
-        },
-        {
-            .name = BLOCK_OPT_BACKING_FILE,
-            .type = QEMU_OPT_STRING,
-            .help = "File name of a base image"
-        },
-        {
-            .name = BLOCK_OPT_BACKING_FMT,
-            .type = QEMU_OPT_STRING,
-            .help = "Image format of the base image"
-        },
-        {
-            .name = BLOCK_OPT_DATA_FILE,
-            .type = QEMU_OPT_STRING,
-            .help = "File name of an external data file"
-        },
-        {
-            .name = BLOCK_OPT_DATA_FILE_RAW,
-            .type = QEMU_OPT_BOOL,
-            .help = "The external data file must stay valid as a raw image"
-        },
-        {
-            .name = BLOCK_OPT_ENCRYPT,
-            .type = QEMU_OPT_BOOL,
-            .help = "Encrypt the image with format 'aes'. (Deprecated "
-                    "in favor of " BLOCK_OPT_ENCRYPT_FORMAT "=aes)",
-        },
-        {
-            .name = BLOCK_OPT_ENCRYPT_FORMAT,
-            .type = QEMU_OPT_STRING,
-            .help = "Encrypt the image, format choices: 'aes', 'luks'",
-        },
-        BLOCK_CRYPTO_OPT_DEF_KEY_SECRET("encrypt.",
-            "ID of secret providing qcow AES key or LUKS passphrase"),
-        BLOCK_CRYPTO_OPT_DEF_LUKS_CIPHER_ALG("encrypt."),
-        BLOCK_CRYPTO_OPT_DEF_LUKS_CIPHER_MODE("encrypt."),
-        BLOCK_CRYPTO_OPT_DEF_LUKS_IVGEN_ALG("encrypt."),
-        BLOCK_CRYPTO_OPT_DEF_LUKS_IVGEN_HASH_ALG("encrypt."),
-        BLOCK_CRYPTO_OPT_DEF_LUKS_HASH_ALG("encrypt."),
-        BLOCK_CRYPTO_OPT_DEF_LUKS_ITER_TIME("encrypt."),
-        {
-            .name = BLOCK_OPT_CLUSTER_SIZE,
-            .type = QEMU_OPT_SIZE,
-            .help = "qcow2 cluster size",
-            .def_value_str = stringify(DEFAULT_CLUSTER_SIZE)
-        },
-        {
-            .name = BLOCK_OPT_PREALLOC,
-            .type = QEMU_OPT_STRING,
-            .help = "Preallocation mode (allowed values: off, metadata, "
-                    "falloc, full)"
-        },
-        {
-            .name = BLOCK_OPT_LAZY_REFCOUNTS,
-            .type = QEMU_OPT_BOOL,
-            .help = "Postpone refcount updates",
-            .def_value_str = "off"
-        },
-        {
-            .name = BLOCK_OPT_REFCOUNT_BITS,
-            .type = QEMU_OPT_NUMBER,
-            .help = "Width of a reference count entry in bits",
-            .def_value_str = "16"
-        },
-        {
-            .name = BLOCK_OPT_COMPRESSION_TYPE,
-            .type = QEMU_OPT_STRING,
-            .help = "Compression method used for image cluster compression",
-            .def_value_str = "zlib"
-        },
+        QCOW_COMMON_OPTIONS,
+        { /* end of list */ }
+    }
+};
+
+static QemuOptsList qcow2_amend_opts = {
+    .name = "qcow2-amend-opts",
+    .head = QTAILQ_HEAD_INITIALIZER(qcow2_amend_opts.head),
+    .desc = {
+        QCOW_COMMON_OPTIONS,
         { /* end of list */ }
     }
 };
@@ -5803,6 +5817,7 @@ BlockDriver bdrv_qcow2 = {
     .bdrv_inactivate            = qcow2_inactivate,
 
     .create_opts         = &qcow2_create_opts,
+    .amend_opts          = &qcow2_amend_opts,
     .strong_runtime_opts = qcow2_strong_runtime_opts,
     .mutable_opts        = mutable_opts,
     .bdrv_co_check       = qcow2_co_check,