bpf: Remove bpf_kfunc_call_test_kptr_get() test kfunc

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We've managed to improve the UX for kptrs significantly over the last 9
months. All of the prior main use cases, struct bpf_cpumask *, struct
task_struct *, and struct cgroup *, have all been updated to be
synchronized mainly using RCU. In other words, their KF_ACQUIRE kfunc
calls are all KF_RCU, and the pointers themselves are MEM_RCU and can be
accessed in an RCU read region in BPF.

In a follow-on change, we'll be removing the KF_KPTR_GET kfunc flag.
This patch prepares for that by removing the
bpf_kfunc_call_test_kptr_get() kfunc, and all associated selftests.

Signed-off-by: David Vernet <void@manifault.com>
Link: https://lore.kernel.org/r/20230416084928.326135-2-void@manifault.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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This commit is contained in:

David Vernet 2023-04-16 03:49:26 -05:00 • committed by Alexei Starovoitov

parent 7a0788fe83

commit 09b501d905

4 changed files with 5 additions and 152 deletions

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12

net/bpf/test_run.c

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40

tools/testing/selftests/bpf/progs/map_kptr.c

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78

tools/testing/selftests/bpf/progs/map_kptr_fail.c

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27

tools/testing/selftests/bpf/verifier/map_kptr.c

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