On 05/15/2015 02:45 PM, Paolo Bonzini wrote:
>
>
> On 15/05/2015 03:37, Wen Congyang wrote:
>> If bus_size is less than 0, the command fails.
>> If buf_size % granularity is not 0, mirror_free_init() will
>> do dangerous things.
>>
>> Signed-off-by: Wen Congyang <[email protected]>
>> ---
>> block/mirror.c | 6 +++++-
>> 1 file changed, 5 insertions(+), 1 deletion(-)
>>
>> diff --git a/block/mirror.c b/block/mirror.c
>> index 58f391a..7732f8b 100644
>> --- a/block/mirror.c
>> +++ b/block/mirror.c
>> @@ -671,6 +671,10 @@ static void mirror_start_job(BlockDriverState *bs,
>> BlockDriverState *target,
>> return;
>> }
>>
>> + if (buf_size < 0) {
>
> This should be <=.
But commit_active_start() passes 0...
Thanks
Wen Congyang
>
> Jeff, can you adjust when committing?
>
> Paolo
>
>> + error_setg(errp, "Invalid parameter '%s'", "buf-size");
>> + return;
>> + }
>>
>> s = block_job_create(driver, bs, speed, cb, opaque, errp);
>> if (!s) {
>> @@ -684,7 +688,7 @@ static void mirror_start_job(BlockDriverState *bs,
>> BlockDriverState *target,
>> s->is_none_mode = is_none_mode;
>> s->base = base;
>> s->granularity = granularity;
>> - s->buf_size = MAX(buf_size, granularity);
>> + s->buf_size = ROUND_UP(buf_size, granularity);
>>
>> s->dirty_bitmap = bdrv_create_dirty_bitmap(bs, granularity, NULL, errp);
>> if (!s->dirty_bitmap) {
>>
> .
>
