修改4g拨号为QMI,需要在系统里后台执行quectel-CM

hc

2024-10-22 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5

 kernel/net/core/tso.c
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@@ -6,18 +6,17 @@
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 #include <asm/unaligned.h>
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 /* Calculate expected number of TX descriptors */
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-int tso_count_descs(struct sk_buff *skb)
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+int tso_count_descs(const struct sk_buff *skb)
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 {
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 	/* The Marvell Way */
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 	return skb_shinfo(skb)->gso_segs * 2 + skb_shinfo(skb)->nr_frags;
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 }
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 EXPORT_SYMBOL(tso_count_descs);
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-void tso_build_hdr(struct sk_buff *skb, char *hdr, struct tso_t *tso,
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+void tso_build_hdr(const struct sk_buff *skb, char *hdr, struct tso_t *tso,
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 		   int size, bool is_last)
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 {
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-	struct tcphdr *tcph;
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-	int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
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+	int hdr_len = skb_transport_offset(skb) + tso->tlen;
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 	int mac_hdr_len = skb_network_offset(skb);
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 	memcpy(hdr, skb->data, hdr_len);
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@@ -30,23 +29,31 @@
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 	} else {
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 		struct ipv6hdr *iph = (void *)(hdr + mac_hdr_len);
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-		iph->payload_len = htons(size + tcp_hdrlen(skb));
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+		iph->payload_len = htons(size + tso->tlen);
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 	}
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-	tcph = (struct tcphdr *)(hdr + skb_transport_offset(skb));
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-	put_unaligned_be32(tso->tcp_seq, &tcph->seq);
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+	hdr += skb_transport_offset(skb);
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+	if (tso->tlen != sizeof(struct udphdr)) {
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+		struct tcphdr *tcph = (struct tcphdr *)hdr;
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-	if (!is_last) {
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-		/* Clear all special flags for not last packet */
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-		tcph->psh = 0;
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-		tcph->fin = 0;
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-		tcph->rst = 0;
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+		put_unaligned_be32(tso->tcp_seq, &tcph->seq);
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+
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+		if (!is_last) {
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+			/* Clear all special flags for not last packet */
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+			tcph->psh = 0;
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+			tcph->fin = 0;
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+			tcph->rst = 0;
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+		}
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+	} else {
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+		struct udphdr *uh = (struct udphdr *)hdr;
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+
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+		uh->len = htons(sizeof(*uh) + size);
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 	}
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 }
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 EXPORT_SYMBOL(tso_build_hdr);
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-void tso_build_data(struct sk_buff *skb, struct tso_t *tso, int size)
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+void tso_build_data(const struct sk_buff *skb, struct tso_t *tso, int size)
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 {
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-	tso->tcp_seq += size;
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+	tso->tcp_seq += size; /* not worth avoiding this operation for UDP */
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 	tso->size -= size;
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 	tso->data += size;
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@@ -55,19 +62,21 @@
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 		skb_frag_t *frag = &skb_shinfo(skb)->frags[tso->next_frag_idx];
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 		/* Move to next segment */
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-		tso->size = frag->size;
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-		tso->data = page_address(frag->page.p) + frag->page_offset;
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+		tso->size = skb_frag_size(frag);
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+		tso->data = skb_frag_address(frag);
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 		tso->next_frag_idx++;
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 	}
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 }
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 EXPORT_SYMBOL(tso_build_data);
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-void tso_start(struct sk_buff *skb, struct tso_t *tso)
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+int tso_start(struct sk_buff *skb, struct tso_t *tso)
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 {
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-	int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
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+	int tlen = skb_is_gso_tcp(skb) ? tcp_hdrlen(skb) : sizeof(struct udphdr);
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+	int hdr_len = skb_transport_offset(skb) + tlen;
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+	tso->tlen = tlen;
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 	tso->ip_id = ntohs(ip_hdr(skb)->id);
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-	tso->tcp_seq = ntohl(tcp_hdr(skb)->seq);
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+	tso->tcp_seq = (tlen != sizeof(struct udphdr)) ? ntohl(tcp_hdr(skb)->seq) : 0;
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 	tso->next_frag_idx = 0;
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 	tso->ipv6 = vlan_get_protocol(skb) == htons(ETH_P_IPV6);
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@@ -79,9 +88,10 @@
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 		skb_frag_t *frag = &skb_shinfo(skb)->frags[tso->next_frag_idx];
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 		/* Move to next segment */
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-		tso->size = frag->size;
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-		tso->data = page_address(frag->page.p) + frag->page_offset;
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+		tso->size = skb_frag_size(frag);
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+		tso->data = skb_frag_address(frag);
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 		tso->next_frag_idx++;
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 	}
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+	return hdr_len;
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 }
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 EXPORT_SYMBOL(tso_start);