Re: [Qemu-devel] [PATCH] block/curl: Improve type safety of s->timeout.

[Stefan Hajnoczi]

On Wed, Oct 29, 2014 at 2:08 AM, Gonglei <address@hidden> wrote:
> On 2014/10/28 22:29, Stefan Hajnoczi wrote:
>
>> On Mon, Oct 06, 2014 at 03:32:10PM +0100, Richard W.M. Jones wrote:
>>> qemu_opt_get_number returns a uint64_t, and curl_easy_setopt expects a
>>> long (not an int).
>>>
>>> Store the timeout (which is a positive number of seconds) as a
>>> uint64_t.  Check that the number given by the user is reasonable.
>>> Cast it to long before calling curl_easy_setopt.
>>>
>>> Example error message after this change has been applied:
>>>
>>> $ ./qemu-img create -f qcow2 /tmp/test.qcow2 \
>>>     -b 'json: { "file.driver":"https",
>>>                 "file.url":"https://foo/bar";,
>>>                 "file.timeout":-1 }'
>>> qemu-img: /tmp/test.qcow2: Could not open 'json: { "file.driver":"https", 
>>> "file.url":"https://foo/bar";, "file.timeout":-1 }': timeout parameter is 
>>> too large or negative: Invalid argument
>>>
>>> Signed-off-by: Richard W.M. Jones <address@hidden>
>>> ---
>>>  block/curl.c | 8 ++++++--
>>>  1 file changed, 6 insertions(+), 2 deletions(-)
>>
>> Thanks, applied to my block tree:
>> https://github.com/stefanha/qemu/commits/block
>>
>> Stefan
>
> Please don't, the patch had been posted v2 which is better:
>
> [PATCH v2] block/curl: Improve type safety of s->timeout.
> http://lists.gnu.org/archive/html/qemu-devel/2014-10/msg03112.html

Sorry, I missed that thread because the cover letter has no 0/N
numbering as required in:
http://qemu-project.org/Contribute/SubmitAPatch

Numbering is a hard requirement so tools know how many emails to wait
for before processing emails.

The "patches" tool (https://github.com/stefanha/patches/) rejects
series that have no numbering.  Single patch emails without a cover
letter or numbering are fine, too.

Stefan