net: tso: add UDP segmentation support (3d5b459b) · Commits · 戴 / test

net/core/tso.c

+18 −11

Original line number	Diff line number	Diff line
		@@ -16,7 +16,6 @@ EXPORT_SYMBOL(tso_count_descs);
		void tso_build_hdr(const struct sk_buff skb, char hdr, struct tso_t *tso,
		int size, bool is_last)
		{
		struct tcphdr *tcph;
		int hdr_len = skb_transport_offset(skb) + tso->tlen;
		int mac_hdr_len = skb_network_offset(skb);

		@@ -32,7 +31,10 @@ void tso_build_hdr(const struct sk_buff skb, char hdr, struct tso_t *tso,

		iph->payload_len = htons(size + tso->tlen);
		}
		tcph = (struct tcphdr *)(hdr + skb_transport_offset(skb));
		hdr += skb_transport_offset(skb);
		if (tso->tlen != sizeof(struct udphdr)) {
		struct tcphdr tcph = (struct tcphdr )hdr;

		put_unaligned_be32(tso->tcp_seq, &tcph->seq);

		if (!is_last) {
		@@ -41,12 +43,17 @@ void tso_build_hdr(const struct sk_buff skb, char hdr, struct tso_t *tso,
		tcph->fin = 0;
		tcph->rst = 0;
		}
		} else {
		struct udphdr uh = (struct udphdr )hdr;

		uh->len = htons(sizeof(*uh) + size);
		}
		}
		EXPORT_SYMBOL(tso_build_hdr);

		void tso_build_data(const struct sk_buff skb, struct tso_t tso, int size)
		{
		tso->tcp_seq += size;
		tso->tcp_seq += size; /* not worth avoiding this operation for UDP */
		tso->size -= size;
		tso->data += size;

		@@ -64,12 +71,12 @@ EXPORT_SYMBOL(tso_build_data);

		int tso_start(struct sk_buff skb, struct tso_t tso)
		{
		int tlen = tcp_hdrlen(skb);
		int tlen = skb_is_gso_tcp(skb) ? tcp_hdrlen(skb) : sizeof(struct udphdr);
		int hdr_len = skb_transport_offset(skb) + tlen;

		tso->tlen = tlen;
		tso->ip_id = ntohs(ip_hdr(skb)->id);
		tso->tcp_seq = ntohl(tcp_hdr(skb)->seq);
		tso->tcp_seq = (tlen != sizeof(struct udphdr)) ? ntohl(tcp_hdr(skb)->seq) : 0;
		tso->next_frag_idx = 0;
		tso->ipv6 = vlan_get_protocol(skb) == htons(ETH_P_IPV6);

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