diff options
| author | Magnus Karlsson <magnus.karlsson@intel.com> | 2023-01-11 12:35:23 +0300 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2023-01-12 05:16:52 +0300 |
| commit | 80bea9acabb7690042f8efe25f208ffc67032aac (patch) | |
| tree | 5928d4db7c4afc7de05ea03f25211802e1816f18 /tools/testing/selftests/bpf/progs | |
| parent | f0a249df1b071d6f7177cc615d688a3a5d48423a (diff) | |
| download | linux-80bea9acabb7690042f8efe25f208ffc67032aac.tar.xz | |
selftests/xsk: add test when some packets are XDP_DROPed
Add a new test where some of the packets are not passed to the AF_XDP
socket and instead get a XDP_DROP verdict. This is important as it
tests the recycling mechanism of the buffer pool. If a packet is not
sent to the AF_XDP socket, the buffer the packet resides in is instead
recycled so it can be used again without the round-trip to user
space. The test introduces a new XDP program that drops every other
packet.
Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com>
Acked-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Link: https://lore.kernel.org/r/20230111093526.11682-13-magnus.karlsson@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'tools/testing/selftests/bpf/progs')
| -rw-r--r-- | tools/testing/selftests/bpf/progs/xsk_xdp_progs.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/xsk_xdp_progs.c b/tools/testing/selftests/bpf/progs/xsk_xdp_progs.c index 698176882ac6..744a01d0e57d 100644 --- a/tools/testing/selftests/bpf/progs/xsk_xdp_progs.c +++ b/tools/testing/selftests/bpf/progs/xsk_xdp_progs.c @@ -11,9 +11,20 @@ struct { __uint(value_size, sizeof(int)); } xsk SEC(".maps"); +static unsigned int idx; + SEC("xdp") int xsk_def_prog(struct xdp_md *xdp) { return bpf_redirect_map(&xsk, 0, XDP_DROP); } +SEC("xdp") int xsk_xdp_drop(struct xdp_md *xdp) +{ + /* Drop every other packet */ + if (idx++ % 2) + return XDP_DROP; + + return bpf_redirect_map(&xsk, 0, XDP_DROP); +} + char _license[] SEC("license") = "GPL"; |