Re: [Qemu-devel] [PATCH] block-migration: deprecate block migration for the 1.2 release

[Kevin Wolf <kwolf@redhat.com>]

Am 14.08.2012 15:32, schrieb Anthony Liguori:
> To be replaced with live block copy.
> 
> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

Might be worth adding a deprecation note in qapi-schema.json.

> ---
>  migration.c |    9 +++++++++
>  1 files changed, 9 insertions(+), 0 deletions(-)
> 
> diff --git a/migration.c b/migration.c
> index 653a3c1..babccf4 100644
> --- a/migration.c
> +++ b/migration.c
> @@ -482,10 +482,19 @@ void qmp_migrate(const char *uri, bool has_blk, bool blk,
>      MigrationParams params;
>      const char *p;
>      int ret;
> +    static bool suppress_deprecation_message;
>  
>      params.blk = blk;
>      params.shared = inc;
>  
> +    if (blk && !suppress_deprecation_message) {

Hm, it's consistent with when we start block migration, but has_blk is
completely ignored for that and blk seems to be uninitialised if
!has_blk. I think this needs to be fixed. (Why does qmp-marshal.c even
compile when it can use blk uninitialised...?)

Kevin

> +        qerror_report(ERROR_CLASS_GENERIC_ERROR,
> +                      "Block migration is deprecated.  "
> +                      "See http://wiki.qemu.org/Features/LiveBlockCopy "
> +                      "for an alternative syntax.");
> +        suppress_deprecation_message = true;
> +    }
> +
>      if (s->state == MIG_STATE_ACTIVE) {
>          error_set(errp, QERR_MIGRATION_ACTIVE);
>          return;
>