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Add max_entries constraints for RingBuffer

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Pragyansh Chaturvedi
2025-11-12 01:14:25 +05:30
parent cd52d0d91b
commit 5eaeb3e921
1 changed files with 11 additions and 0 deletions
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11
pythonbpf/maps/maps_pass.py
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@ -86,6 +86,17 @@ def process_ringbuf_map(map_name, rval, module):
map_params = _parse_map_params(rval, expected_args=["max_entries"]) map_params = _parse_map_params(rval, expected_args=["max_entries"])
map_params["type"] = BPFMapType.RINGBUF map_params["type"] = BPFMapType.RINGBUF
# NOTE: constraints borrowed from https://docs.ebpf.io/linux/map-type/BPF_MAP_TYPE_RINGBUF/
max_entries = map_params.get("max_entries")
if (
not isinstance(max_entries, int)
or max_entries < 4096
or (max_entries & (max_entries - 1)) != 0
):
raise ValueError(
"Ringbuf max_entries must be a power of two greater than or equal to the page size (4096)"
)
logger.info(f"Ringbuf map parameters: {map_params}") logger.info(f"Ringbuf map parameters: {map_params}")
map_global = create_bpf_map(module, map_name, map_params) map_global = create_bpf_map(module, map_name, map_params)