bpf: Add wakeup_source iterators #6460
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Add a BPF iterator for traversing through wakeup_sources. Setup iterators to traverse through a SRCUs of wakeup_sources. This is a more elegant and efficient traversal than going through the options today, such as at /sys/class/wakeup, or through debugfs. Signed-off-by: Samuel Wu <[email protected]>
Add open coded BPF iterators for wakeup_sources, which opens up more options for BPF programs that need to traverse through wakeup_sources. Signed-off-by: Samuel Wu <[email protected]>
Sets up the framework to test wakeup_sources iterators using BPF, and adds a few basic tests. Adds several helper functions that for grabbing and releasing a wakelock, abstracting out key functions to setup a framework for testing wakeup_sources. Additionally, adds 3 tests: 1. check_active_count: Checks that stats related to active_count are properly set after several lock/unlock cycles 2. check_sleep_times: Checks that time accounting related to sleep are properly calculated 3. check_no_infinite_reads: Checks that the iterator traversal returns NULL at the end Signed-off-by: Samuel Wu <[email protected]>
This commit introduces a new selftest for the BPF wakeup_source iterator to verify the functionality of open-coded iteration. The test adds: - A new BPF map `test_ws_hash` to track iterated wakeup source names. - A BPF program `iter_ws_for_each` that iterates over wakeup sources and updates the `test_ws_hash` map with the names of found sources. - A new subtest `subtest_ws_iter_check_open_coded` to trigger the BPF program and assert that the expected wakeup sources are marked in the map. Signed-off-by: Samuel Wu <[email protected]>
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At least one diff in series https://patchwork.kernel.org/project/netdevbpf/list/?series=1030294 expired. Closing PR. |
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Pull request for series with
subject: bpf: Add wakeup_source iterators
version: 1
url: https://patchwork.kernel.org/project/netdevbpf/list/?series=1030294