X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=blobdiff_plain;f=net%2Fcore%2Ffilter.c;h=8e587dd1da200494b900bd14eec7f875f5453773;hb=d9ff286a0f59fa7843549e49bd240393dd7d8b87;hp=2b3b436ef5457bf44c99780d6dec0b5f403f005c;hpb=866e6ac47409f0bd12398b777fef61fb51ce3680;p=linux.git

diff --git a/net/core/filter.c b/net/core/filter.c
index 2b3b436ef545..8e587dd1da20 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -6700,6 +6700,27 @@ static u32 bpf_convert_ctx_access(enum bpf_access_type type,
 							     target_size));
 		break;
 
+	case offsetof(struct __sk_buff, gso_segs):
+		/* si->dst_reg = skb_shinfo(SKB); */
+#ifdef NET_SKBUFF_DATA_USES_OFFSET
+		*insn++ = BPF_LDX_MEM(BPF_FIELD_SIZEOF(struct sk_buff, head),
+				      si->dst_reg, si->src_reg,
+				      offsetof(struct sk_buff, head));
+		*insn++ = BPF_LDX_MEM(BPF_FIELD_SIZEOF(struct sk_buff, end),
+				      BPF_REG_AX, si->src_reg,
+				      offsetof(struct sk_buff, end));
+		*insn++ = BPF_ALU64_REG(BPF_ADD, si->dst_reg, BPF_REG_AX);
+#else
+		*insn++ = BPF_LDX_MEM(BPF_FIELD_SIZEOF(struct sk_buff, end),
+				      si->dst_reg, si->src_reg,
+				      offsetof(struct sk_buff, end));
+#endif
+		*insn++ = BPF_LDX_MEM(BPF_FIELD_SIZEOF(struct skb_shared_info, gso_segs),
+				      si->dst_reg, si->dst_reg,
+				      bpf_target_off(struct skb_shared_info,
+						     gso_segs, 2,
+						     target_size));
+		break;
 	case offsetof(struct __sk_buff, wire_len):
 		BUILD_BUG_ON(FIELD_SIZEOF(struct qdisc_skb_cb, pkt_len) != 4);