Re: [Qemu-devel] [PATCH v5 RESEND 1/4] qapi: introduce PreallocMode and a new PreallocMode full.

[Fam Zheng <famz@redhat.com>]

On Tue, 02/11 15:07, Hu Tao wrote:
> This patch prepares for the subsequent patches.
> 
> Signed-off-by: Hu Tao <hutao@cn.fujitsu.com>
> ---
>  block/qcow2.c    |  8 ++++----
>  qapi-schema.json | 12 ++++++++++++
>  2 files changed, 16 insertions(+), 4 deletions(-)
> 
> diff --git a/block/qcow2.c b/block/qcow2.c
> index 99a1ad1..30e36bc 100644
> --- a/block/qcow2.c
> +++ b/block/qcow2.c
> @@ -1452,7 +1452,7 @@ static int preallocate(BlockDriverState *bs)
>  
>  static int qcow2_create2(const char *filename, int64_t total_size,
>                           const char *backing_file, const char *backing_format,
> -                         int flags, size_t cluster_size, int prealloc,
> +                         int flags, size_t cluster_size, PreallocMode prealloc,
>                           QEMUOptionParameter *options, int version,
>                           Error **errp)
>  {
> @@ -1622,7 +1622,7 @@ static int qcow2_create(const char *filename, QEMUOptionParameter *options,
>      uint64_t sectors = 0;
>      int flags = 0;
>      size_t cluster_size = DEFAULT_CLUSTER_SIZE;
> -    int prealloc = 0;
> +    PreallocMode prealloc = PREALLOC_MODE_OFF;
>      int version = 3;
>      Error *local_err = NULL;
>      int ret;
> @@ -1643,9 +1643,9 @@ static int qcow2_create(const char *filename, QEMUOptionParameter *options,
>              }
>          } else if (!strcmp(options->name, BLOCK_OPT_PREALLOC)) {
>              if (!options->value.s || !strcmp(options->value.s, "off")) {
> -                prealloc = 0;
> +                prealloc = PREALLOC_MODE_OFF;
>              } else if (!strcmp(options->value.s, "metadata")) {
> -                prealloc = 1;
> +                prealloc = PREALLOC_MODE_METADATA;
>              } else {
>                  error_setg(errp, "Invalid preallocation mode: '%s'",
>                             options->value.s);
> diff --git a/qapi-schema.json b/qapi-schema.json
> index 05ced9d..f86068c 100644
> --- a/qapi-schema.json
> +++ b/qapi-schema.json
> @@ -4419,3 +4419,15 @@
>  # Since: 1.7
>  ##
>  { 'command': 'blockdev-add', 'data': { 'options': 'BlockdevOptions' } }
> +
> +##
> +# @PreallocMode
> +#
> +# Preallocation mode of QEMU image file
> +#
> +# @off: no preallocation
> +# @metadata: preallocate only for metadata
> +# @full: preallocate all data, including metadata
> +##
> +{ 'enum': 'PreallocMode',
> +  'data': [ 'off', 'metadata', 'full' ] }
> -- 
> 1.8.0
> 

Reviewed-by: Fam Zheng <famz@redhat.com>