[04/13] block: amend: separate amend and create options for qemu-img
diff mbox series

Message ID 20200114193350.10830-5-mlevitsk@redhat.com
State New
Headers show
Series
  • LUKS: encryption slot management using amend interface
Related show

Commit Message

Maxim Levitsky Jan. 14, 2020, 7:33 p.m. UTC
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>
---
 block/qcow2.c             | 160 +++++++++++++++++++++-----------------
 include/block/block_int.h |   4 +
 qemu-img.c                |  18 ++---
 3 files changed, 100 insertions(+), 82 deletions(-)

Comments

Daniel P. Berrangé Jan. 28, 2020, 5:23 p.m. UTC | #1
On Tue, Jan 14, 2020 at 09:33:41PM +0200, Maxim Levitsky wrote:
> 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.

I think I would have done that in this commit. At least the
encrypt.* options shouldn't be added to the amend_opts list,
since they're being removed from it again a few patches later.

> 
> Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
> ---
>  block/qcow2.c             | 160 +++++++++++++++++++++-----------------
>  include/block/block_int.h |   4 +
>  qemu-img.c                |  18 ++---
>  3 files changed, 100 insertions(+), 82 deletions(-)
> 
> diff --git a/block/qcow2.c b/block/qcow2.c
> index 6bcf4a5fc4..c6c2deee75 100644
> --- a/block/qcow2.c
> +++ b/block/qcow2.c
> @@ -5445,83 +5445,96 @@ 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"                                       \
> +    }                                                               \
> +
>  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"
> -        },
> +        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 */ }
>      }
>  };
> @@ -5581,6 +5594,7 @@ 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,
> diff --git a/include/block/block_int.h b/include/block/block_int.h
> index 810a9ecb86..6f0abf8544 100644
> --- a/include/block/block_int.h
> +++ b/include/block/block_int.h
> @@ -407,6 +407,10 @@ struct BlockDriver {
>  
>      /* List of options for creating images, terminated by name == NULL */
>      QemuOptsList *create_opts;
> +
> +    /* List of options for image amend*/
> +    QemuOptsList *amend_opts;
> +
>      /*
>       * If this driver supports reopening images this contains a
>       * NULL-terminated list of the runtime options that can be
> diff --git a/qemu-img.c b/qemu-img.c
> index a79f3904db..befd53943b 100644
> --- a/qemu-img.c
> +++ b/qemu-img.c
> @@ -3878,11 +3878,11 @@ static int print_amend_option_help(const char *format)
>          return 1;
>      }
>  
> -    /* Every driver supporting amendment must have create_opts */
> -    assert(drv->create_opts);
> +    /* Every driver supporting amendment must have amend_opts */
> +    assert(drv->amend_opts);
>  
>      printf("Creation options for '%s':\n", format);
> -    qemu_opts_print_help(drv->create_opts, false);
> +    qemu_opts_print_help(drv->amend_opts, false);
>      printf("\nNote that not all of these options may be amendable.\n");
>      return 0;
>  }
> @@ -3892,7 +3892,7 @@ static int img_amend(int argc, char **argv)
>      Error *err = NULL;
>      int c, ret = 0;
>      char *options = NULL;
> -    QemuOptsList *create_opts = NULL;
> +    QemuOptsList *amend_opts = NULL;
>      QemuOpts *opts = NULL;
>      const char *fmt = NULL, *filename, *cache;
>      int flags;
> @@ -4031,11 +4031,11 @@ static int img_amend(int argc, char **argv)
>          goto out;
>      }
>  
> -    /* Every driver supporting amendment must have create_opts */
> -    assert(bs->drv->create_opts);
> +    /* Every driver supporting amendment must have amend_opts */
> +    assert(bs->drv->amend_opts);
>  
> -    create_opts = qemu_opts_append(create_opts, bs->drv->create_opts);
> -    opts = qemu_opts_create(create_opts, NULL, 0, &error_abort);
> +    amend_opts = qemu_opts_append(amend_opts, bs->drv->amend_opts);
> +    opts = qemu_opts_create(amend_opts, NULL, 0, &error_abort);
>      qemu_opts_do_parse(opts, options, NULL, &err);
>      if (err) {
>          error_report_err(err);
> @@ -4058,7 +4058,7 @@ out:
>  out_no_progress:
>      blk_unref(blk);
>      qemu_opts_del(opts);
> -    qemu_opts_free(create_opts);
> +    qemu_opts_free(amend_opts);
>      g_free(options);
>  
>      if (ret) {
> -- 
> 2.17.2
> 

Regards,
Daniel
Maxim Levitsky Jan. 30, 2020, 3:54 p.m. UTC | #2
On Tue, 2020-01-28 at 17:23 +0000, Daniel P. Berrangé wrote:
> On Tue, Jan 14, 2020 at 09:33:41PM +0200, Maxim Levitsky wrote:
> > 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.
> 
> I think I would have done that in this commit. At least the
> encrypt.* options shouldn't be added to the amend_opts list,
> since they're being removed from it again a few patches later.

After taking on IRC, I understood the point.

I indeed will send another patch after this one that will
only cleanup qcow2 amend/create options and then patch that
adds luks amend to qcow2, thus 3 patches in total, this one,
the patch that cleans the create/amend separation and then
patch that adds luks amend to qcow2.




[...]

Thanks for the review,
Best regards,
	Maxim Levitsky

Patch
diff mbox series

diff --git a/block/qcow2.c b/block/qcow2.c
index 6bcf4a5fc4..c6c2deee75 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -5445,83 +5445,96 @@  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"                                       \
+    }                                                               \
+
 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"
-        },
+        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 */ }
     }
 };
@@ -5581,6 +5594,7 @@  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,
diff --git a/include/block/block_int.h b/include/block/block_int.h
index 810a9ecb86..6f0abf8544 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -407,6 +407,10 @@  struct BlockDriver {
 
     /* List of options for creating images, terminated by name == NULL */
     QemuOptsList *create_opts;
+
+    /* List of options for image amend*/
+    QemuOptsList *amend_opts;
+
     /*
      * If this driver supports reopening images this contains a
      * NULL-terminated list of the runtime options that can be
diff --git a/qemu-img.c b/qemu-img.c
index a79f3904db..befd53943b 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -3878,11 +3878,11 @@  static int print_amend_option_help(const char *format)
         return 1;
     }
 
-    /* Every driver supporting amendment must have create_opts */
-    assert(drv->create_opts);
+    /* Every driver supporting amendment must have amend_opts */
+    assert(drv->amend_opts);
 
     printf("Creation options for '%s':\n", format);
-    qemu_opts_print_help(drv->create_opts, false);
+    qemu_opts_print_help(drv->amend_opts, false);
     printf("\nNote that not all of these options may be amendable.\n");
     return 0;
 }
@@ -3892,7 +3892,7 @@  static int img_amend(int argc, char **argv)
     Error *err = NULL;
     int c, ret = 0;
     char *options = NULL;
-    QemuOptsList *create_opts = NULL;
+    QemuOptsList *amend_opts = NULL;
     QemuOpts *opts = NULL;
     const char *fmt = NULL, *filename, *cache;
     int flags;
@@ -4031,11 +4031,11 @@  static int img_amend(int argc, char **argv)
         goto out;
     }
 
-    /* Every driver supporting amendment must have create_opts */
-    assert(bs->drv->create_opts);
+    /* Every driver supporting amendment must have amend_opts */
+    assert(bs->drv->amend_opts);
 
-    create_opts = qemu_opts_append(create_opts, bs->drv->create_opts);
-    opts = qemu_opts_create(create_opts, NULL, 0, &error_abort);
+    amend_opts = qemu_opts_append(amend_opts, bs->drv->amend_opts);
+    opts = qemu_opts_create(amend_opts, NULL, 0, &error_abort);
     qemu_opts_do_parse(opts, options, NULL, &err);
     if (err) {
         error_report_err(err);
@@ -4058,7 +4058,7 @@  out:
 out_no_progress:
     blk_unref(blk);
     qemu_opts_del(opts);
-    qemu_opts_free(create_opts);
+    qemu_opts_free(amend_opts);
     g_free(options);
 
     if (ret) {