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bpf: Force to MPTCP #5467

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bpf: Force to MPTCP #5467

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Pull request for series with
subject: bpf: Force to MPTCP
version: 8
url: https://patchwork.kernel.org/project/netdevbpf/list/?series=772472

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Upstream branch: 87dc2bb
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=772472
version: 8

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Upstream branch: 87dc2bb
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=772639
version: 9

@kernel-patches-daemon-bpf kernel-patches-daemon-bpf bot added V9 and removed V8 labels Aug 3, 2023
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Upstream branch: 87dc2bb
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=772639
version: 9

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Upstream branch: 648880e
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=772639
version: 9

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Upstream branch: 6f9bad6
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=772639
version: 9

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Upstream branch: 5964d1e
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=772639
version: 9

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Upstream branch: 5964d1e
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=772850
version: 10

@kernel-patches-daemon-bpf kernel-patches-daemon-bpf bot added V10 and removed V9 labels Aug 4, 2023
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Upstream branch: 5964d1e
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=772896
version: 11

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Upstream branch: 21ce6ab
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=772896
version: 11

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Upstream branch: a5c0a42
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=773504
version: 12

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Upstream branch: eb62e6a
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=773504
version: 12

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Upstream branch: e546a11
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=773504
version: 12

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Upstream branch: 96ead1e
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=773504
version: 12

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Upstream branch: 898f55f
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=773504
version: 12

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Upstream branch: 526bc5b
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=773504
version: 12

@geliangtang
bpf: Add update_socket_protocol hook
6326ed9 
Add a hook named update_socket_protocol in __sys_socket(), for bpf
progs to attach to and update socket protocol. One user case is to
force legacy TCP apps to create and use MPTCP sockets instead of
TCP ones.

Define a mod_ret set named bpf_mptcp_fmodret_ids, add the hook
update_socket_protocol into this set, and register it in
bpf_mptcp_kfunc_init().

Closes: multipath-tcp/mptcp_net-next#79
Acked-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Acked-by: Yonghong Song <yonghong.song@linux.dev>
Signed-off-by: Geliang Tang <geliang.tang@suse.com>
@geliangtang
selftests/bpf: Use random netns name for mptcp
ceecf8b 
When running mptcp tests simultaneously, it fails sometimes with
"Cannot create namespace file "/var/run/netns/mptcp_ns": File exists"
errors. So this patch uses rand() to generate a random netns name
instead of using the fixed name "mptcp_ns" for every test.

Add "ip netns show" after "ip netns del" to check if there is a test
did not clean up its netns

By doing that, we can re-launch the test even if there was an issue
removing the previous netns or if by accident, a netns with this
generic name already existed on the system.

Note that using a different name each will also help adding more
subtests in future commits.

Acked-by: Yonghong Song <yonghong.song@linux.dev>
Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Geliang Tang <geliang.tang@suse.com>
@geliangtang
selftests/bpf: Add two mptcp netns helpers
0c19777 
Add two netns helpers for mptcp tests: create_netns() and
cleanup_netns(). Use them in test_base().

These new helpers will be re-used in the following commits introducing
new tests.

Acked-by: Yonghong Song <yonghong.song@linux.dev>
Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Geliang Tang <geliang.tang@suse.com>
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Upstream branch: 2adbb76
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=773504
version: 12

@geliangtang
selftests/bpf: Fix error checks of mptcp open_and_load
0ac9406 
Return libbpf_get_error(), instead of -EIO, for the error from
mptcp_sock__open_and_load().

Load success means prog_fd and map_fd are always valid. So drop these
unneeded ASSERT_GE checks for them in mptcp run_test().

Acked-by: Yonghong Song <yonghong.song@linux.dev>
Signed-off-by: Geliang Tang <geliang.tang@suse.com>
@geliangtang
selftests/bpf: Add mptcpify test
29fe9dc 
Implement a new test program mptcpify: if the family is AF_INET or
AF_INET6, the type is SOCK_STREAM, and the protocol ID is 0 or
IPPROTO_TCP, set it to IPPROTO_MPTCP. It will be hooked in
update_socket_protocol().

Extend the MPTCP test base, add a selftest test_mptcpify() for the
mptcpify case. Open and load the mptcpify test prog to mptcpify the
TCP sockets dynamically, then use start_server() and connect_to_fd()
to create a TCP socket, but actually what's created is an MPTCP
socket, which can be verified through 'getsockopt(SOL_PROTOCOL)'
and 'nstat' commands.

Acked-by: Yonghong Song <yonghong.song@linux.dev>
Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Geliang Tang <geliang.tang@suse.com>
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At least one diff in series https://patchwork.kernel.org/project/netdevbpf/list/?series=773504 expired. Closing PR.

@kernel-patches-daemon-bpf kernel-patches-daemon-bpf bot deleted the series/766966=>bpf-next branch August 11, 2023 13:06
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