aboutsummaryrefslogtreecommitdiff
path: root/samples/bpf/xdpsock_kern.c
diff options
context:
space:
mode:
authorRodrigo Vivi <[email protected]>2018-07-23 09:13:12 -0700
committerRodrigo Vivi <[email protected]>2018-07-23 09:13:12 -0700
commitc74a7469f97c0f40b46e82ee979f9fb1bb6e847c (patch)
treef2690a1a916b73ef94657fbf0e0141ae57701825 /samples/bpf/xdpsock_kern.c
parent6f15a7de86c8cf2dc09fc9e6d07047efa40ef809 (diff)
parent500775074f88d9cf5416bed2ca19592812d62c41 (diff)
Merge drm/drm-next into drm-intel-next-queued
We need a backmerge to get DP_DPCD_REV_14 before we push other i915 changes to dinq that could break compilation. Signed-off-by: Rodrigo Vivi <[email protected]>
Diffstat (limited to 'samples/bpf/xdpsock_kern.c')
-rw-r--r--samples/bpf/xdpsock_kern.c56
1 files changed, 56 insertions, 0 deletions
diff --git a/samples/bpf/xdpsock_kern.c b/samples/bpf/xdpsock_kern.c
new file mode 100644
index 000000000000..d8806c41362e
--- /dev/null
+++ b/samples/bpf/xdpsock_kern.c
@@ -0,0 +1,56 @@
+// SPDX-License-Identifier: GPL-2.0
+#define KBUILD_MODNAME "foo"
+#include <uapi/linux/bpf.h>
+#include "bpf_helpers.h"
+
+#include "xdpsock.h"
+
+struct bpf_map_def SEC("maps") qidconf_map = {
+ .type = BPF_MAP_TYPE_ARRAY,
+ .key_size = sizeof(int),
+ .value_size = sizeof(int),
+ .max_entries = 1,
+};
+
+struct bpf_map_def SEC("maps") xsks_map = {
+ .type = BPF_MAP_TYPE_XSKMAP,
+ .key_size = sizeof(int),
+ .value_size = sizeof(int),
+ .max_entries = 4,
+};
+
+struct bpf_map_def SEC("maps") rr_map = {
+ .type = BPF_MAP_TYPE_PERCPU_ARRAY,
+ .key_size = sizeof(int),
+ .value_size = sizeof(unsigned int),
+ .max_entries = 1,
+};
+
+SEC("xdp_sock")
+int xdp_sock_prog(struct xdp_md *ctx)
+{
+ int *qidconf, key = 0, idx;
+ unsigned int *rr;
+
+ qidconf = bpf_map_lookup_elem(&qidconf_map, &key);
+ if (!qidconf)
+ return XDP_ABORTED;
+
+ if (*qidconf != ctx->rx_queue_index)
+ return XDP_PASS;
+
+#if RR_LB /* NB! RR_LB is configured in xdpsock.h */
+ rr = bpf_map_lookup_elem(&rr_map, &key);
+ if (!rr)
+ return XDP_ABORTED;
+
+ *rr = (*rr + 1) & (MAX_SOCKS - 1);
+ idx = *rr;
+#else
+ idx = 0;
+#endif
+
+ return bpf_redirect_map(&xsks_map, idx, 0);
+}
+
+char _license[] SEC("license") = "GPL";