5 files changed, 158 insertions, 0 deletions
diff --git a/src/spdk/dpdk/examples/bpf/README b/src/spdk/dpdk/examples/bpf/README
new file mode 100644
index 000000000..d714180a5
--- /dev/null
+++ b/src/spdk/dpdk/examples/bpf/README
@@ -0,0 +1,8 @@
+This folder contains example BPF programs for use with the DPDK bpf
+library. To get details of each program and how to compile it, see
+the header on the '.c' file itself.
+
+Once compiled, these example programs can be loaded into `testpmd`
+for execution on a packet stream. See `bpf-load` and `bpf-unload`
+commands documented in the `Testpmd Application User Guide` for
+details on how to do so.
diff --git a/src/spdk/dpdk/examples/bpf/dummy.c b/src/spdk/dpdk/examples/bpf/dummy.c
new file mode 100644
index 000000000..5851469e7
--- /dev/null
+++ b/src/spdk/dpdk/examples/bpf/dummy.c
@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2018 Intel Corporation
+ */
+
+/*
+ * eBPF program sample.
+ * does nothing always return success.
+ * used to measure BPF infrastructure overhead.
+ * To compile:
+ * clang -O2 -target bpf -c dummy.c
+ */
+
+#include <stdint.h>
+#include <stddef.h>
+
+uint64_t
+entry(void *arg)
+{
+	return 1;
+}
diff --git a/src/spdk/dpdk/examples/bpf/t1.c b/src/spdk/dpdk/examples/bpf/t1.c
new file mode 100644
index 000000000..3364b4f1e
--- /dev/null
+++ b/src/spdk/dpdk/examples/bpf/t1.c
@@ -0,0 +1,56 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2018 Intel Corporation
+ */
+
+/*
+ * eBPF program sample.
+ * Accepts pointer to first segment packet data as an input parameter.
+ * analog of tcpdump -s 1 -d 'dst 1.2.3.4 && udp && dst port 5000'
+ * (000) ldh      [12]
+ * (001) jeq      #0x800           jt 2    jf 12
+ * (002) ld       [30]
+ * (003) jeq      #0x1020304       jt 4    jf 12
+ * (004) ldb      [23]
+ * (005) jeq      #0x11            jt 6    jf 12
+ * (006) ldh      [20]
+ * (007) jset     #0x1fff          jt 12   jf 8
+ * (008) ldxb     4*([14]&0xf)
+ * (009) ldh      [x + 16]
+ * (010) jeq      #0x1388          jt 11   jf 12
+ * (011) ret      #1
+ * (012) ret      #0
+ *
+ * To compile on x86:
+ * clang -O2 -U __GNUC__ -target bpf -c t1.c
+ *
+ * To compile on ARM:
+ * clang -O2 -I/usr/include/aarch64-linux-gnu/ -target bpf -c t1.c
+ */
+
+#include <stdint.h>
+#include <net/ethernet.h>
+#include <netinet/ip.h>
+#include <netinet/udp.h>
+#include <arpa/inet.h>
+
+uint64_t
+entry(void *pkt)
+{
+	struct ether_header *ether_header = (void *)pkt;
+
+	if (ether_header->ether_type != htons(0x0800))
+		return 0;
+
+	struct iphdr *iphdr = (void *)(ether_header + 1);
+	if (iphdr->protocol != 17 || (iphdr->frag_off & 0x1ffff) != 0 ||
+			iphdr->daddr != htonl(0x1020304))
+		return 0;
+
+	int hlen = iphdr->ihl * 4;
+	struct udphdr *udphdr = (void *)iphdr + hlen;
+
+	if (udphdr->dest != htons(5000))
+		return 0;
+
+	return 1;
+}
diff --git a/src/spdk/dpdk/examples/bpf/t2.c b/src/spdk/dpdk/examples/bpf/t2.c
new file mode 100644
index 000000000..9878eaf7b
--- /dev/null
+++ b/src/spdk/dpdk/examples/bpf/t2.c
@@ -0,0 +1,31 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2018 Intel Corporation
+ */
+
+/*
+ * eBPF program sample.
+ * Accepts pointer to struct rte_mbuf as an input parameter.
+ * cleanup mbuf's vlan_tci and all related RX flags
+ * (PKT_RX_VLAN_PKT | PKT_RX_VLAN_STRIPPED).
+ * Doesn't touch contents of packet data.
+ * To compile:
+ * clang -O2 -I${RTE_SDK}/${RTE_TARGET}/include \
+ * -target bpf -Wno-int-to-void-pointer-cast -c t2.c
+ */
+
+#include <stdint.h>
+#include <stddef.h>
+#include <rte_config.h>
+#include <rte_mbuf_core.h>
+
+uint64_t
+entry(void *pkt)
+{
+	struct rte_mbuf *mb;
+
+	mb = pkt;
+	mb->vlan_tci = 0;
+	mb->ol_flags &= ~(PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED);
+
+	return 1;
+}
diff --git a/src/spdk/dpdk/examples/bpf/t3.c b/src/spdk/dpdk/examples/bpf/t3.c
new file mode 100644
index 000000000..f58ff64b3
--- /dev/null
+++ b/src/spdk/dpdk/examples/bpf/t3.c
@@ -0,0 +1,43 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2018 Intel Corporation
+ */
+
+/*
+ * eBPF program sample.
+ * Accepts pointer to struct rte_mbuf as an input parameter.
+ * Dump the mbuf into stdout if it is an ARP packet (aka tcpdump 'arp').
+ *
+ * To compile on x86:
+ * clang -O2 -U __GNUC__ -I${RTE_SDK}/${RTE_TARGET}/include \
+ * -target bpf -Wno-int-to-void-pointer-cast -c t3.c
+ *
+ * To compile on ARM:
+ * clang -O2 -I/usr/include/aarch64-linux-gnu \
+ * -I${RTE_SDK}/${RTE_TARGET}/include -target bpf \
+ * -Wno-int-to-void-pointer-cast -c t3.c
+ */
+
+#include <stdint.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <net/ethernet.h>
+#include <rte_config.h>
+#include <rte_mbuf_core.h>
+#include <arpa/inet.h>
+
+extern void rte_pktmbuf_dump(FILE *, const struct rte_mbuf *, unsigned int);
+
+uint64_t
+entry(const void *pkt)
+{
+	const struct rte_mbuf *mb;
+	const struct ether_header *eth;
+
+	mb = pkt;
+	eth = rte_pktmbuf_mtod(mb, const struct ether_header *);
+
+	if (eth->ether_type == htons(ETHERTYPE_ARP))
+		rte_pktmbuf_dump(stdout, mb, 64);
+
+	return 1;
+}