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Re: [PATCH v1 1/1] QIOChannelSocket: Add support for MSG_ZEROCOPY + IPV6
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From: |
Peter Xu |
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Subject: |
Re: [PATCH v1 1/1] QIOChannelSocket: Add support for MSG_ZEROCOPY + IPV6 |
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Date: |
Thu, 4 Aug 2022 10:05:21 -0400 |
On Thu, Aug 04, 2022 at 04:10:43AM -0300, Leonardo Bras wrote:
> For using MSG_ZEROCOPY, there are two steps:
> 1 - io_writev() the packet, which enqueues the packet for sending, and
> 2 - io_flush(), which gets confirmation that all packets got correctly sent
>
> Currently, if MSG_ZEROCOPY is used to send packets over IPV6, no error will
> be reported in (1), but it will fail in the first time (2) happens.
>
> This happens because (2) currently checks for cmsg_level & cmsg_type
> associated with IPV4 only, before reporting any error.
>
> Add checks for cmsg_level & cmsg_type associated with IPV6, and thus enable
> support for MSG_ZEROCOPY + IPV6
>
> Fixes: 2bc58ffc29 ("QIOChannelSocket: Implement io_writev zero copy flag &
> io_flush for CONFIG_LINUX")
> Signed-off-by: Leonardo Bras <leobras@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
--
Peter Xu