From: Andrii Nakryiko <andrii.nakryiko@gmail.com>
To: Jakub Sitnicki <jakub@cloudflare.com>
Cc: bpf <bpf@vger.kernel.org>, Networking <netdev@vger.kernel.org>,
kernel-team@cloudflare.com
Subject: Re: [PATCH bpf-next 3/3] bpf, netns: Keep a list of attached bpf_link's
Date: Mon, 22 Jun 2020 23:26:40 -0700 [thread overview]
Message-ID: <CAEf4BzbjnLYmJRJjFMz3H5HJa8pnD27JACHK36jZUyGDkVzzMA@mail.gmail.com> (raw)
In-Reply-To: <20200622160300.636567-4-jakub@cloudflare.com>
On Mon, Jun 22, 2020 at 9:04 AM Jakub Sitnicki <jakub@cloudflare.com> wrote:
>
> To support multi-prog link-based attachments for new netns attach types, we
> need to keep track of more than one bpf_link per attach type. Hence,
> convert net->bpf.links into a list, that currently can be either empty or
> have just one item.
>
> Instead of reusing bpf_prog_list from bpf-cgroup, we link together
> bpf_netns_link's themselves. This makes list management simpler as we don't
> have to allocate, initialize, and later release list elements. We can do
> this because multi-prog attachment will be available only for bpf_link, and
> we don't need to build a list of programs attached directly and indirectly
> via links.
>
> No functional changes intended.
>
> Signed-off-by: Jakub Sitnicki <jakub@cloudflare.com>
> ---
Acked-by: Andrii Nakryiko <andriin@fb.com>
> include/net/netns/bpf.h | 2 +-
> kernel/bpf/net_namespace.c | 42 +++++++++++++++++++++-----------------
> 2 files changed, 24 insertions(+), 20 deletions(-)
>
[...]
prev parent reply other threads:[~2020-06-23 6:26 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-22 16:02 [PATCH bpf-next 0/3] bpf, netns: Prepare for multi-prog attachment Jakub Sitnicki
2020-06-22 16:02 ` [PATCH bpf-next 1/3] flow_dissector: Pull BPF program assignment up to bpf-netns Jakub Sitnicki
2020-06-23 6:02 ` Andrii Nakryiko
2020-06-22 16:02 ` [PATCH bpf-next 2/3] bpf, netns: Keep attached programs in bpf_prog_array Jakub Sitnicki
2020-06-23 6:23 ` Andrii Nakryiko
2020-06-23 10:51 ` Jakub Sitnicki
2020-06-22 16:03 ` [PATCH bpf-next 3/3] bpf, netns: Keep a list of attached bpf_link's Jakub Sitnicki
2020-06-23 6:26 ` Andrii Nakryiko [this message]
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