Re: [PATCH bpf-next v9 8/8] selftests/bpf: Test switching TCP Congestion Control algorithms.

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On 3/21/23 14:05, Martin KaFai Lau wrote:
On 3/20/23 12:56 PM, Kui-Feng Lee wrote:
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.

Test for BPF_F_REPLACE is needed.

Sure!



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