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 <a...@plumgrid.com>
---
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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