linux/kernel/bpf
Alexei Starovoitov a43eec3042 bpf: introduce bpf_perf_event_output() helper
This helper is used to send raw data from eBPF program into
special PERF_TYPE_SOFTWARE/PERF_COUNT_SW_BPF_OUTPUT perf_event.
User space needs to perf_event_open() it (either for one or all cpus) and
store FD into perf_event_array (similar to bpf_perf_event_read() helper)
before eBPF program can send data into it.

Today the programs triggered by kprobe collect the data and either store
it into the maps or print it via bpf_trace_printk() where latter is the debug
facility and not suitable to stream the data. This new helper replaces
such bpf_trace_printk() usage and allows programs to have dedicated
channel into user space for post-processing of the raw data collected.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-22 06:42:15 -07:00
..
arraymap.c bpf: introduce bpf_perf_event_output() helper 2015-10-22 06:42:15 -07:00
core.c bpf: split state from prandom_u32() and consolidate {c, e}BPF prngs 2015-10-08 05:26:39 -07:00
hashtab.c bpf: charge user for creation of BPF maps and programs 2015-10-12 19:13:36 -07:00
helpers.c bpf: split state from prandom_u32() and consolidate {c, e}BPF prngs 2015-10-08 05:26:39 -07:00
Makefile ebpf: remove kernel test stubs 2015-03-01 14:05:18 -05:00
syscall.c bpf: Need to call bpf_prog_uncharge_memlock from bpf_prog_put 2015-10-16 00:55:02 -07:00
verifier.c bpf: introduce bpf_perf_event_output() helper 2015-10-22 06:42:15 -07:00