On 06/28/2014 02:06 AM, Alexei Starovoitov wrote:
User interface: cat bpf_123 > /sys/kernel/debug/tracing/__event__/filter where 123 is an id of the eBPF program priorly loaded. __event__ is static tracepoint event. (kprobe events will be supported in the future patches) eBPF programs can call in-kernel helper functions to: - lookup/update/delete elements in maps - memcmp - trace_printk - load_pointer - dump_stack
Are there plans to let eBPF replace the generic event filtering framework in tracing?
Signed-off-by: Alexei Starovoitov <ast@xxxxxxxxxxxx> --- include/linux/ftrace_event.h | 5 + include/trace/bpf_trace.h | 29 +++++ include/trace/ftrace.h | 10 ++ include/uapi/linux/bpf.h | 5 + kernel/trace/Kconfig | 1 + kernel/trace/Makefile | 1 + kernel/trace/bpf_trace.c | 217 ++++++++++++++++++++++++++++++++++++ kernel/trace/trace.h | 3 + kernel/trace/trace_events.c | 7 ++ kernel/trace/trace_events_filter.c | 72 +++++++++++- 10 files changed, 349 insertions(+), 1 deletion(-) create mode 100644 include/trace/bpf_trace.h create mode 100644 kernel/trace/bpf_trace.c
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