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| author | Alexei Starovoitov <ast@plumgrid.com> | 2014-12-01 15:06:39 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-12-05 21:47:34 -0800 |
| commit | fbe3310840c65f3cf97dd90d23e177d061c376f2 (patch) | |
| tree | ee28163a6c53e0131fd2d3d626d02b0610eaed2b /drivers/clk/ti/clk-3xxx.c | |
| parent | a80857822b0c2ed608c93504bd3687b78f20c619 (diff) | |
samples: bpf: large eBPF program in C
sockex2_kern.c is purposefully large eBPF program in C.
llvm compiles ~200 lines of C code into ~300 eBPF instructions.
It's similar to __skb_flow_dissect() to demonstrate that complex packet parsing
can be done by eBPF.
Then it uses (struct flow_keys)->dst IP address (or hash of ipv6 dst) to keep
stats of number of packets per IP.
User space loads eBPF program, attaches it to loopback interface and prints
dest_ip->#packets stats every second.
Usage:
$sudo samples/bpf/sockex2
ip 127.0.0.1 count 19
ip 127.0.0.1 count 178115
ip 127.0.0.1 count 369437
ip 127.0.0.1 count 559841
ip 127.0.0.1 count 750539
Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/clk/ti/clk-3xxx.c')
0 files changed, 0 insertions, 0 deletions