Re: [Qemu-devel] [PATCH v23 14/32] vvfat.c: handle cross_driver's create_options and create_opts

[Leandro Dorileo <l@dorileo.org>]

On Fri, Mar 21, 2014 at 06:12:25PM +0800, Chunyan Liu wrote:
> vvfat shares create options of qcow driver. To avoid vvfat broken when
> qcow driver changes from QEMUOptionParameter to QemuOpts, let it able
> to handle both cases.
> 
> Signed-off-by: Chunyan Liu <cyliu@suse.com>
> ---
>  block/vvfat.c | 19 ++++++++++++++-----
>  1 file changed, 14 insertions(+), 5 deletions(-)
> 
> diff --git a/block/vvfat.c b/block/vvfat.c
> index ee32b3c..82b1521 100644
> --- a/block/vvfat.c
> +++ b/block/vvfat.c
> @@ -2907,7 +2907,8 @@ static BlockDriver vvfat_write_target = {
>  static int enable_write_target(BDRVVVFATState *s)
>  {
>      BlockDriver *bdrv_qcow;
> -    QEMUOptionParameter *options;
> +    QemuOptsList *create_opts;
> +    QemuOpts *opts;


opts is used uninitialized.


>      Error *local_err = NULL;
>      int ret;
>      int size = sector2cluster(s, s->sector_count);
> @@ -2922,11 +2923,17 @@ static int enable_write_target(BDRVVVFATState *s)
>      }
>  
>      bdrv_qcow = bdrv_find_format("qcow");
> -    options = parse_option_parameters("", bdrv_qcow->create_options, NULL);
> -    set_option_parameter_int(options, BLOCK_OPT_SIZE, s->sector_count * 512);
> -    set_option_parameter(options, BLOCK_OPT_BACKING_FILE, "fat:");
> +    assert(!(bdrv_qcow->create_opts && bdrv_qcow->create_options));
> +    if (bdrv_qcow->create_options) {
> +        create_opts = params_to_opts(bdrv_qcow->create_options);
> +    } else {
> +        create_opts = bdrv_qcow->create_opts;
> +    }
> +    opts = qemu_opts_create(create_opts, NULL, 0, &error_abort);
> +    qemu_opt_set_number(opts, BLOCK_OPT_SIZE, s->sector_count * 512);
> +    qemu_opt_set(opts, BLOCK_OPT_BACKING_FILE, "fat:");
>  
> -    ret = bdrv_create(bdrv_qcow, s->qcow_filename, options, NULL, &local_err);
> +    ret = bdrv_create(bdrv_qcow, s->qcow_filename, NULL, opts, &local_err);
>      if (ret < 0) {
>          qerror_report_err(local_err);
>          error_free(local_err);
> @@ -2955,6 +2962,8 @@ static int enable_write_target(BDRVVVFATState *s)
>      return 0;
>  
>  err:
> +    qemu_opts_del(opts);
> +    qemu_opts_free(create_opts);
>      g_free(s->qcow_filename);
>      s->qcow_filename = NULL;
>      return ret;
> -- 
> 1.7.12.4
> 
> 

-- 
Leandro Dorileo