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Alexei Starovoitov fbe3310840 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>

2014-12-05 21:47:34 -08:00

bpf

samples: bpf: large eBPF program in C

2014-12-05 21:47:34 -08:00

hidraw

HID: samples/hidraw: add .gitignore file

2013-08-20 12:48:58 +02:00

hw_breakpoint

perf: Add context field to perf_event

2011-07-01 11:06:38 +02:00

kdb

kdb: Add kdb kernel module sample