X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=lib%2Flibrte_bpf%2Fbpf_exec.c;h=b921112feb3a700f580e3cf6f8c51d44fdab61ed;hb=d354c5e77666f443dfdb1dadc7b8abe0c9fe258d;hp=6a79139c0d07fbc7030159c985e38d71572c18be;hpb=60702e8c7cbbadd4d5e6ffe4d7f470db339b0a04;p=dpdk.git

diff --git a/lib/librte_bpf/bpf_exec.c b/lib/librte_bpf/bpf_exec.c
index 6a79139c0d..b921112feb 100644
--- a/lib/librte_bpf/bpf_exec.c
+++ b/lib/librte_bpf/bpf_exec.c
@@ -74,6 +74,26 @@
 		(uintptr_t)((reg)[(ins)->dst_reg] + (ins)->off), \
 		reg[ins->src_reg]))
 
+/* BPF_LD | BPF_ABS/BPF_IND */
+
+#define	NOP(x)	(x)
+
+#define BPF_LD_ABS(bpf, reg, ins, type, op) do { \
+	const type *p = bpf_ld_mbuf(bpf, reg, ins, (ins)->imm, sizeof(type)); \
+	if (p == NULL)  \
+		return 0; \
+	reg[EBPF_REG_0] = op(p[0]); \
+} while (0)
+
+#define BPF_LD_IND(bpf, reg, ins, type, op) do { \
+	uint32_t ofs = reg[ins->src_reg] + (ins)->imm; \
+	const type *p = bpf_ld_mbuf(bpf, reg, ins, ofs, sizeof(type)); \
+	if (p == NULL)  \
+		return 0; \
+	reg[EBPF_REG_0] = op(p[0]); \
+} while (0)
+
+
 static inline void
 bpf_alu_be(uint64_t reg[EBPF_REG_NUM], const struct ebpf_insn *ins)
 {
@@ -112,6 +132,23 @@ bpf_alu_le(uint64_t reg[EBPF_REG_NUM], const struct ebpf_insn *ins)
 	}
 }
 
+static inline const void *
+bpf_ld_mbuf(const struct rte_bpf *bpf, uint64_t reg[EBPF_REG_NUM],
+	const struct ebpf_insn *ins, uint32_t off, uint32_t len)
+{
+	const struct rte_mbuf *mb;
+	const void *p;
+
+	mb = (const struct rte_mbuf *)(uintptr_t)reg[EBPF_REG_6];
+	p = rte_pktmbuf_read(mb, off, len, reg + EBPF_REG_0);
+	if (p == NULL)
+		RTE_BPF_LOG(DEBUG, "%s(bpf=%p, mbuf=%p, ofs=%u, len=%u): "
+			"load beyond packet boundary at pc: %#zx;\n",
+			__func__, bpf, mb, off, len,
+			(uintptr_t)(ins) - (uintptr_t)(bpf)->prm.ins);
+	return p;
+}
+
 static inline uint64_t
 bpf_exec(const struct rte_bpf *bpf, uint64_t reg[EBPF_REG_NUM])
 {
@@ -296,6 +333,26 @@ bpf_exec(const struct rte_bpf *bpf, uint64_t reg[EBPF_REG_NUM])
 				(uint64_t)(uint32_t)ins[1].imm << 32;
 			ins++;
 			break;
+		/* load absolute instructions */
+		case (BPF_LD | BPF_ABS | BPF_B):
+			BPF_LD_ABS(bpf, reg, ins, uint8_t, NOP);
+			break;
+		case (BPF_LD | BPF_ABS | BPF_H):
+			BPF_LD_ABS(bpf, reg, ins, uint16_t, rte_be_to_cpu_16);
+			break;
+		case (BPF_LD | BPF_ABS | BPF_W):
+			BPF_LD_ABS(bpf, reg, ins, uint32_t, rte_be_to_cpu_32);
+			break;
+		/* load indirect instructions */
+		case (BPF_LD | BPF_IND | BPF_B):
+			BPF_LD_IND(bpf, reg, ins, uint8_t, NOP);
+			break;
+		case (BPF_LD | BPF_IND | BPF_H):
+			BPF_LD_IND(bpf, reg, ins, uint16_t, rte_be_to_cpu_16);
+			break;
+		case (BPF_LD | BPF_IND | BPF_W):
+			BPF_LD_IND(bpf, reg, ins, uint32_t, rte_be_to_cpu_32);
+			break;
 		/* store instructions */
 		case (BPF_STX | BPF_MEM | BPF_B):
 			BPF_ST_REG(reg, ins, uint8_t);
@@ -424,7 +481,7 @@ bpf_exec(const struct rte_bpf *bpf, uint64_t reg[EBPF_REG_NUM])
 	return 0;
 }
 
-__rte_experimental uint32_t
+uint32_t
 rte_bpf_exec_burst(const struct rte_bpf *bpf, void *ctx[], uint64_t rc[],
 	uint32_t num)
 {
@@ -443,7 +500,7 @@ rte_bpf_exec_burst(const struct rte_bpf *bpf, void *ctx[], uint64_t rc[],
 	return i;
 }
 
-__rte_experimental uint64_t
+uint64_t
 rte_bpf_exec(const struct rte_bpf *bpf, void *ctx)
 {
 	uint64_t rc;