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From: Alexei Starovoitov <alexei.starovoitov@gmail.com>
To: Magnus Karlsson <magnus.karlsson@intel.com>
Cc: "Björn Töpel" <bjorn.topel@intel.com>,
	"Alexei Starovoitov" <ast@kernel.org>,
	"Daniel Borkmann" <daniel@iogearbox.net>,
	"Network Development" <netdev@vger.kernel.org>,
	"Jonathan Lemon" <jonathan.lemon@gmail.com>,
	bpf <bpf@vger.kernel.org>,
	degeneloy@gmail.com, "John Fastabend" <john.fastabend@gmail.com>
Subject: Re: [PATCH bpf-next v3] libbpf: fix compatibility for kernels without need_wakeup
Date: Mon, 28 Oct 2019 20:27:09 -0700	[thread overview]
Message-ID: <CAADnVQJ7je1J_u9xpHHHLWJBgnSbY+y2jz4wX0+ux88oAToRCQ@mail.gmail.com> (raw)
In-Reply-To: <1571995035-21889-1-git-send-email-magnus.karlsson@intel.com>

On Fri, Oct 25, 2019 at 2:17 AM Magnus Karlsson
<magnus.karlsson@intel.com> wrote:
>
> When the need_wakeup flag was added to AF_XDP, the format of the
> XDP_MMAP_OFFSETS getsockopt was extended. Code was added to the
> kernel to take care of compatibility issues arrising from running
> applications using any of the two formats. However, libbpf was
> not extended to take care of the case when the application/libbpf
> uses the new format but the kernel only supports the old
> format. This patch adds support in libbpf for parsing the old
> format, before the need_wakeup flag was added, and emulating a
> set of static need_wakeup flags that will always work for the
> application.
>
> v2 -> v3:
> * Incorporated code improvements suggested by Jonathan Lemon
>
> v1 -> v2:
> * Rebased to bpf-next
> * Rewrote the code as the previous version made you blind
>
> Fixes: a4500432c2587cb2a ("libbpf: add support for need_wakeup flag in AF_XDP part")
> Reported-by: Eloy Degen <degeneloy@gmail.com>
> Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com>

Applied. Thanks

  parent reply	other threads:[~2019-10-29  3:27 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-25  9:17 [PATCH bpf-next v3] libbpf: fix compatibility for kernels without need_wakeup Magnus Karlsson
2019-10-25 19:30 ` Jonathan Lemon
2019-10-29  3:27 ` Alexei Starovoitov [this message]
2019-10-30 13:33 ` Toke Høiland-Jørgensen
2019-10-31  7:17   ` Magnus Karlsson
2019-10-31  8:02     ` Björn Töpel
2019-10-31  8:17       ` Magnus Karlsson
2019-10-31  9:50         ` Toke Høiland-Jørgensen
2019-10-31 14:00       ` Alexei Starovoitov
2019-10-31 14:13         ` Toke Høiland-Jørgensen
2019-10-31 14:17           ` Alexei Starovoitov
2019-10-31 14:26             ` Toke Høiland-Jørgensen
2019-10-31 14:44               ` Alexei Starovoitov
2019-10-31 14:52                 ` Toke Høiland-Jørgensen
2019-10-31 15:17                   ` Alexei Starovoitov
2019-10-31 17:42                     ` Jiri Olsa
2019-10-31 18:19                       ` Alexei Starovoitov
2019-10-31 19:18                         ` Jiri Olsa
2019-10-31 20:39                           ` Alexei Starovoitov
2019-11-01  7:27                             ` Jiri Olsa
2019-11-01 15:51                               ` Alexei Starovoitov
2019-11-01 19:36                                 ` Toke Høiland-Jørgensen
2019-11-01 20:41                                   ` Alexei Starovoitov
2019-11-01 21:41                                     ` Toke Høiland-Jørgensen
2019-11-01 22:08                                       ` Alexei Starovoitov
2019-11-01  9:16                             ` Toke Høiland-Jørgensen
2019-11-01 14:51                               ` John Fastabend
2019-10-31 20:23                     ` Andrii Nakryiko

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