Re: [Qemu-devel] [PATCH v5 00/11] curl: fix curl read

[Stefan Hajnoczi <stefanha@gmail.com>]

On Thu, May 23, 2013 at 11:37:58AM +0800, Fam Zheng wrote:
> CURL library API has changed, the current curl driver is not working.
> This patch rewrites the use of API as well as the structure of internal
> states.
> 
> BDRVCURLState holds the pointer to curl multi interface (man 3
> libcurl-multi), and 4 lists for internal states:
>  - CURLState holds state for libcurl connection (man 3 libcurl-easy)
>  - CURLSockInfo holds information for libcurl socket interface (man 3
>    curl_multi_socket_action).
>  - CURLDataCache holds the user data read from libcurl, it is in a list
>    ordered by access, the used cache is moved to list head on access, so
>    the tail element is freed first. BDRVCURLState.cache_quota is the
>    threshold to start freeing cache.
>  - CURLAIOCB holds ongoing aio information.

Looking pretty good.

It's not clear to me if block/curl.c was broken, besides failing with
HTTP servers that do not support Range:, or which part of this series
fixes the bug(s).  Can you clarify that in the patch description?

I'll test the next revision and audit a little more for memory leaks,
since you are introducing several heap-allocated structures and lists.