* [Qemu-devel] [PATCH] block-commit: speed is an optional parameter
@ 2014-04-10 17:36 Max Reitz
2014-04-11 1:09 ` [Qemu-devel] [Qemu-stable] " Fam Zheng
2014-04-11 11:20 ` [Qemu-devel] " Kevin Wolf
0 siblings, 2 replies; 4+ messages in thread
From: Max Reitz @ 2014-04-10 17:36 UTC (permalink / raw)
To: qemu-devel; +Cc: Kevin Wolf, qemu-stable, Stefan Hajnoczi, Max Reitz
As speed is an optional parameter for the QMP block-commit command, it
should be set to 0 if not given (as it is undefined if has_speed is
false), that is, the speed should not be limited.
Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
---
This patch was previously part of the "qemu-img: Implement commit like
QMP" series, but as this is a general bugfix, it has been separated.
---
blockdev.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/blockdev.c b/blockdev.c
index c3422a1..5dd01ea 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -1876,6 +1876,10 @@ void qmp_block_commit(const char *device,
*/
BlockdevOnError on_error = BLOCKDEV_ON_ERROR_REPORT;
+ if (!has_speed) {
+ speed = 0;
+ }
+
/* drain all i/o before commits */
bdrv_drain_all();
--
1.9.1
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [Qemu-devel] [Qemu-stable] [PATCH] block-commit: speed is an optional parameter
2014-04-10 17:36 [Qemu-devel] [PATCH] block-commit: speed is an optional parameter Max Reitz
@ 2014-04-11 1:09 ` Fam Zheng
2014-04-11 1:38 ` Eric Blake
2014-04-11 11:20 ` [Qemu-devel] " Kevin Wolf
1 sibling, 1 reply; 4+ messages in thread
From: Fam Zheng @ 2014-04-11 1:09 UTC (permalink / raw)
To: Max Reitz; +Cc: Kevin Wolf, qemu-devel, Stefan Hajnoczi, qemu-stable
On Thu, 04/10 19:36, Max Reitz wrote:
> As speed is an optional parameter for the QMP block-commit command, it
> should be set to 0 if not given (as it is undefined if has_speed is
> false), that is, the speed should not be limited.
>
> Signed-off-by: Max Reitz <mreitz@redhat.com>
> Reviewed-by: Eric Blake <eblake@redhat.com>
> ---
> This patch was previously part of the "qemu-img: Implement commit like
> QMP" series, but as this is a general bugfix, it has been separated.
> ---
Reviewed-by: Fam Zheng <famz@redhat.com>
The (generated) caller qmp_marshal_input_block_commit() actually leaves speed
uninitialized, so we're not safe without this patch:
int qmp_marshal_input_block_commit(Monitor *mon, const QDict *qdict, QObject **ret)
{
Error *local_err = NULL;
Error **errp = &local_err;
QDict *args = (QDict *)qdict;
QmpInputVisitor *mi;
QapiDeallocVisitor *md;
Visitor *v;
char * device = NULL;
bool has_base = false;
char * base = NULL;
char * top = NULL;
bool has_speed = false;
int64_t speed;
I'm wondering what the reason is to initialize pointers (like base and device)
while leaving int64_t values uninitilized in the code generator?
Fam
> blockdev.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/blockdev.c b/blockdev.c
> index c3422a1..5dd01ea 100644
> --- a/blockdev.c
> +++ b/blockdev.c
> @@ -1876,6 +1876,10 @@ void qmp_block_commit(const char *device,
> */
> BlockdevOnError on_error = BLOCKDEV_ON_ERROR_REPORT;
>
> + if (!has_speed) {
> + speed = 0;
> + }
> +
> /* drain all i/o before commits */
> bdrv_drain_all();
>
> --
> 1.9.1
>
>
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [Qemu-devel] [Qemu-stable] [PATCH] block-commit: speed is an optional parameter
2014-04-11 1:09 ` [Qemu-devel] [Qemu-stable] " Fam Zheng
@ 2014-04-11 1:38 ` Eric Blake
0 siblings, 0 replies; 4+ messages in thread
From: Eric Blake @ 2014-04-11 1:38 UTC (permalink / raw)
To: Fam Zheng, Max Reitz; +Cc: Kevin Wolf, qemu-devel, Stefan Hajnoczi, qemu-stable
[-- Attachment #1: Type: text/plain, Size: 1118 bytes --]
On 04/10/2014 07:09 PM, Fam Zheng wrote:
> On Thu, 04/10 19:36, Max Reitz wrote:
>> As speed is an optional parameter for the QMP block-commit command, it
>> should be set to 0 if not given (as it is undefined if has_speed is
>> false), that is, the speed should not be limited.
>>
>> Signed-off-by: Max Reitz <mreitz@redhat.com>
>> Reviewed-by: Eric Blake <eblake@redhat.com>
>> ---
>> This patch was previously part of the "qemu-img: Implement commit like
>> QMP" series, but as this is a general bugfix, it has been separated.
>> ---
>
> Reviewed-by: Fam Zheng <famz@redhat.com>
>
> The (generated) caller qmp_marshal_input_block_commit() actually leaves speed
> uninitialized, so we're not safe without this patch:
> I'm wondering what the reason is to initialize pointers (like base and device)
> while leaving int64_t values uninitilized in the code generator?
Because no one has applied this patch yet:
https://lists.gnu.org/archive/html/qemu-devel/2014-03/msg04224.html
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [Qemu-devel] [PATCH] block-commit: speed is an optional parameter
2014-04-10 17:36 [Qemu-devel] [PATCH] block-commit: speed is an optional parameter Max Reitz
2014-04-11 1:09 ` [Qemu-devel] [Qemu-stable] " Fam Zheng
@ 2014-04-11 11:20 ` Kevin Wolf
1 sibling, 0 replies; 4+ messages in thread
From: Kevin Wolf @ 2014-04-11 11:20 UTC (permalink / raw)
To: Max Reitz; +Cc: qemu-devel, Stefan Hajnoczi, qemu-stable
Am 10.04.2014 um 19:36 hat Max Reitz geschrieben:
> As speed is an optional parameter for the QMP block-commit command, it
> should be set to 0 if not given (as it is undefined if has_speed is
> false), that is, the speed should not be limited.
>
> Signed-off-by: Max Reitz <mreitz@redhat.com>
> Reviewed-by: Eric Blake <eblake@redhat.com>
> ---
> This patch was previously part of the "qemu-img: Implement commit like
> QMP" series, but as this is a general bugfix, it has been separated.
Thanks, applied to the block branch.
In future patches, please add an explicit 'Cc: qemu-stable@nongnu.org'
line to the commit message so that the stable maintainers can grep in
git log for candidates. I added it manually while applying.
Kevin
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2014-04-11 11:20 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2014-04-10 17:36 [Qemu-devel] [PATCH] block-commit: speed is an optional parameter Max Reitz
2014-04-11 1:09 ` [Qemu-devel] [Qemu-stable] " Fam Zheng
2014-04-11 1:38 ` Eric Blake
2014-04-11 11:20 ` [Qemu-devel] " Kevin Wolf
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