From: Lorenz Bauer <lmb@cloudflare.com>
To: eric.dumazet@gmail.com, daniel@iogearbox.net, ast@kernel.org,
andrii@kernel.org
Cc: bpf@vger.kernel.org, netdev@vger.kernel.org,
kernel-team@cloudflare.com, Lorenz Bauer <lmb@cloudflare.com>
Subject: [PATCH bpf-next v3 0/4] Expose network namespace cookies to user space
Date: Fri, 19 Feb 2021 15:43:26 +0000 [thread overview]
Message-ID: <20210219154330.93615-1-lmb@cloudflare.com> (raw)
We're working on a user space control plane for the BPF sk_lookup
hook [1]. The hook attaches to a network namespace and allows
control over which socket receives a new connection / packet.
I'm proposing to add a new getsockopt and a netns ioctl to retrieve
netns cookies, which allows identifying which netns a socket belongs
to.
1: https://www.kernel.org/doc/html/latest/bpf/prog_sk_lookup.html
Changes in v3:
- Use sock_net unconditionally
- Fix unused variable in nsfs ioctl
- Be strict about getsockopt value size
Changes in v2:
- Rebase on top of Eric Dumazet's netns cookie simplification
Lorenz Bauer (4):
net: add SO_NETNS_COOKIE socket option
nsfs: add an ioctl to discover the network namespace cookie
tools/testing: add test for NS_GET_COOKIE
tools/testing: add a selftest for SO_NETNS_COOKIE
arch/alpha/include/uapi/asm/socket.h | 2 +
arch/mips/include/uapi/asm/socket.h | 2 +
arch/parisc/include/uapi/asm/socket.h | 2 +
arch/sparc/include/uapi/asm/socket.h | 2 +
fs/nsfs.c | 7 +++
include/uapi/asm-generic/socket.h | 2 +
include/uapi/linux/nsfs.h | 2 +
net/core/sock.c | 7 +++
tools/testing/selftests/net/.gitignore | 1 +
tools/testing/selftests/net/Makefile | 2 +-
tools/testing/selftests/net/config | 1 +
tools/testing/selftests/net/so_netns_cookie.c | 61 +++++++++++++++++++
tools/testing/selftests/nsfs/.gitignore | 1 +
tools/testing/selftests/nsfs/Makefile | 2 +-
tools/testing/selftests/nsfs/config | 1 +
tools/testing/selftests/nsfs/netns.c | 57 +++++++++++++++++
16 files changed, 150 insertions(+), 2 deletions(-)
create mode 100644 tools/testing/selftests/net/so_netns_cookie.c
create mode 100644 tools/testing/selftests/nsfs/netns.c
--
2.27.0
next reply other threads:[~2021-02-19 15:45 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-19 15:43 Lorenz Bauer [this message]
2021-02-19 15:43 ` [PATCH bpf-next v3 1/4] net: add SO_NETNS_COOKIE socket option Lorenz Bauer
2021-02-19 15:43 ` [PATCH bpf-next v3 2/4] nsfs: add an ioctl to discover the network namespace cookie Lorenz Bauer
2021-02-19 15:43 ` [PATCH bpf-next v3 3/4] tools/testing: add test for NS_GET_COOKIE Lorenz Bauer
2021-02-19 15:43 ` [PATCH bpf-next v3 4/4] tools/testing: add a selftest for SO_NETNS_COOKIE Lorenz Bauer
2021-03-12 9:57 ` [PATCH bpf-next v3 0/4] Expose network namespace cookies to user space Tony Lu
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