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It is needed to remove the BPF_STRUCT_OPS usages from the tcp-cc tests
because it is defined in bpf_tcp_helpers.h which is going to be retired.
While at it, this patch consolidates all tcp-cc struct_ops programs to
use the SEC("struct_ops") + BPF_PROG().
It also removes the unnecessary __always_inline usages from the
tcp-cc tests.
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Link: https://lore.kernel.org/r/20240509175026.3423614-5-martin.lau@linux.dev
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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This patch removes the individual tcp_sk implementations from the
tcp-cc tests. The tcp_sk() implementation from the bpf_tracing_net.h
is reused instead.
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Link: https://lore.kernel.org/r/20240509175026.3423614-4-martin.lau@linux.dev
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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Create a pair of sockets that utilize the congestion control algorithm
under a particular name. Then switch up this congestion control
algorithm to another implementation and check whether newly created
connections using the same cc name now run the new implementation.
Also, try to update a link with a struct_ops that is without
BPF_F_LINK or with a wrong or different name. These cases should fail
due to the violation of assumptions. To update a bpf_link of a
struct_ops, it must be replaced with another struct_ops that is
identical in type and name and has the BPF_F_LINK flag.
The other test case is to create links from the same struct_ops more
than once. It makes sure a struct_ops can be used repeatly.
Signed-off-by: Kui-Feng Lee <kuifeng@meta.com>
Link: https://lore.kernel.org/r/20230323032405.3735486-9-kuifeng@meta.com
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
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