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Re: [Qemu-block] [Qemu-devel] [PATCH 1/4] block/curl: Use BDRV_SECTOR_SI

From: Max Reitz
Subject: Re: [Qemu-block] [Qemu-devel] [PATCH 1/4] block/curl: Use BDRV_SECTOR_SIZE
Date: Wed, 26 Oct 2016 16:39:02 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0

On 25.10.2016 20:31, Eric Blake wrote:
> On 10/24/2016 09:54 PM, Max Reitz wrote:
>> Currently, curl defines its own constant SECTOR_SIZE. There is no
>> advantage over using the global BDRV_SECTOR_SIZE, so drop it.
>> Cc: address@hidden
>> Signed-off-by: Max Reitz <address@hidden>
>> ---
>>  block/curl.c | 11 +++++------
>>  1 file changed, 5 insertions(+), 6 deletions(-)
> Reviewed-by: Eric Blake <address@hidden>
> (Can curl technically be used to access single-byte granularity?  I
> suppose that would be a larger patch, though, to implement the right
> callbacks).

Yes, it definitely can, and yes, we definitely should implement it at
some point.

>> +    DPRINTF("CURL (AIO): Reading %llu at %zd (%s)\n",
>> +            (acb->nb_sectors * BDRV_SECTOR_SIZE), start, state->range);
> Eww. start is seriously limited to size_t rather than off_t?  Doesn't
> that cripple us to a maximum of 4G files on 32-bit hosts?  But unrelated
> to this patch.

Well, yes, it's all kind of yuck...

Thanks for reviewing, though!


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