Re: [Qemu-block] [RFC PATCH 18/56] migration: Make parameter max-bandwidth unsigned in QAPI/QMP

[Juan Quintela]

Markus Armbruster <address@hidden> wrote:
> Byte rates should use QAPI type 'size' (uint64_t).
> migrate_set_speed's parameter @value and member @max-bandwidth of
> MigrationParameters and MigrateSetParameters are 'int' (int64_t).
>
> Change them all to 'size'.
>
> migrate_set_speed and migrate-set-parameters now accept bandwidth
> values between 2^63 and SIZE_MAX (commonly 2^64-1).  They accept
> negative values as before, because that's how the QObject input
> visitor works for backward compatibility.
>
> So does HMP's migrate_set_speed, except it continues to reject
> negative values.
>
> query-migrate-parameters now reports bandwidth values above 2^63-1
> correctly instead of their (negative) two's complement.
>
> So does HMP's "info migrate_params".
>
> Signed-off-by: Markus Armbruster <address@hidden>

Reviewed-by: Juan Quintela <address@hidden>

> -    if (params->has_max_bandwidth &&
> -        (params->max_bandwidth < 0 || params->max_bandwidth > SIZE_MAX)) {
> +    if (params->has_max_bandwidth && params->max_bandwidth > SIZE_MAX) {


Much nicer for something that we know can't be negative O:-)