bpf: Add kfuncs and selftests for detecting execution context and selftests #6199
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This path introduces several kfuncs to help BPF programs determine their current execution context. When hooking functions for statistics, we often need to use current->comm to get the process name. However, these hooked functions can be called from either process context or interrupt context. When called from interrupt context, the current we obtain may refer to the process that was interrupted, which may not be what we need. These new kfuncs expose APIs that allow users to determine the actual execution context. Signed-off-by: Jiayuan Chen <[email protected]>
Add selftests for the newly introduced context detection kfuncs. The tests verify that each kfunc correctly identifies its respective execution context by triggering different contexts Signed-off-by: Jiayuan Chen <[email protected]>
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Upstream branch: e758657 |
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At least one diff in series https://patchwork.kernel.org/project/netdevbpf/list/?series=1014468 expired. Closing PR. |
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Pull request for series with
subject: bpf: Add kfuncs and selftests for detecting execution context and selftests
version: 1
url: https://patchwork.kernel.org/project/netdevbpf/list/?series=1014468