Re: [PATCH 2/2] rbd: add an option for md5 checksumming (v2)

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On Thu, Aug 25, 2011 at 1:32 PM, Tommi Virtanen
<tommi.virtanen@xxxxxxxxxxxxx> wrote:
> On Thu, Aug 25, 2011 at 04:03, Christian Brunner <chb@xxxxxx> wrote:
>> +  if (buf) {
>> +    dif = ofs-lastofs;
>> +    if (dif > 0) {
>> +      byte *tempbuf = (byte *) malloc(dif);
>> +      memset(tempbuf, 0, dif);
>> +      Hash->Update((const byte *) tempbuf, dif);
>> +      free(tempbuf);
>> +    }
>> +
>> +    Hash->Update((const byte *) buf, len);
>> +    lastofs = ofs + len;
>> +  }
>
> Does this mean a file with a 100GB hole in it will make you malloc(100GB)?
>
That's in the read_iterate() callback. It wouldn't be called with
anything larger than a single block size.

Unless I'm somehow missing, it's still missing the holes. Now it just
ignores them, it should be taking them into account as zero data.


Yehuda
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