mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-27 06:34:11 +08:00
880388aa3c
Such packets are no longer possible. Signed-off-by: David S. Miller <davem@davemloft.net>
99 lines
2.7 KiB
C
99 lines
2.7 KiB
C
#ifndef _LINUX_VIRTIO_NET_H
|
|
#define _LINUX_VIRTIO_NET_H
|
|
|
|
#include <linux/if_vlan.h>
|
|
#include <uapi/linux/virtio_net.h>
|
|
|
|
static inline int virtio_net_hdr_to_skb(struct sk_buff *skb,
|
|
const struct virtio_net_hdr *hdr,
|
|
bool little_endian)
|
|
{
|
|
unsigned short gso_type = 0;
|
|
|
|
if (hdr->gso_type != VIRTIO_NET_HDR_GSO_NONE) {
|
|
switch (hdr->gso_type & ~VIRTIO_NET_HDR_GSO_ECN) {
|
|
case VIRTIO_NET_HDR_GSO_TCPV4:
|
|
gso_type = SKB_GSO_TCPV4;
|
|
break;
|
|
case VIRTIO_NET_HDR_GSO_TCPV6:
|
|
gso_type = SKB_GSO_TCPV6;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (hdr->gso_type & VIRTIO_NET_HDR_GSO_ECN)
|
|
gso_type |= SKB_GSO_TCP_ECN;
|
|
|
|
if (hdr->gso_size == 0)
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) {
|
|
u16 start = __virtio16_to_cpu(little_endian, hdr->csum_start);
|
|
u16 off = __virtio16_to_cpu(little_endian, hdr->csum_offset);
|
|
|
|
if (!skb_partial_csum_set(skb, start, off))
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (hdr->gso_type != VIRTIO_NET_HDR_GSO_NONE) {
|
|
u16 gso_size = __virtio16_to_cpu(little_endian, hdr->gso_size);
|
|
|
|
skb_shinfo(skb)->gso_size = gso_size;
|
|
skb_shinfo(skb)->gso_type = gso_type;
|
|
|
|
/* Header must be checked, and gso_segs computed. */
|
|
skb_shinfo(skb)->gso_type |= SKB_GSO_DODGY;
|
|
skb_shinfo(skb)->gso_segs = 0;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline int virtio_net_hdr_from_skb(const struct sk_buff *skb,
|
|
struct virtio_net_hdr *hdr,
|
|
bool little_endian,
|
|
bool has_data_valid)
|
|
{
|
|
memset(hdr, 0, sizeof(*hdr)); /* no info leak */
|
|
|
|
if (skb_is_gso(skb)) {
|
|
struct skb_shared_info *sinfo = skb_shinfo(skb);
|
|
|
|
/* This is a hint as to how much should be linear. */
|
|
hdr->hdr_len = __cpu_to_virtio16(little_endian,
|
|
skb_headlen(skb));
|
|
hdr->gso_size = __cpu_to_virtio16(little_endian,
|
|
sinfo->gso_size);
|
|
if (sinfo->gso_type & SKB_GSO_TCPV4)
|
|
hdr->gso_type = VIRTIO_NET_HDR_GSO_TCPV4;
|
|
else if (sinfo->gso_type & SKB_GSO_TCPV6)
|
|
hdr->gso_type = VIRTIO_NET_HDR_GSO_TCPV6;
|
|
else
|
|
return -EINVAL;
|
|
if (sinfo->gso_type & SKB_GSO_TCP_ECN)
|
|
hdr->gso_type |= VIRTIO_NET_HDR_GSO_ECN;
|
|
} else
|
|
hdr->gso_type = VIRTIO_NET_HDR_GSO_NONE;
|
|
|
|
if (skb->ip_summed == CHECKSUM_PARTIAL) {
|
|
hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
|
|
if (skb_vlan_tag_present(skb))
|
|
hdr->csum_start = __cpu_to_virtio16(little_endian,
|
|
skb_checksum_start_offset(skb) + VLAN_HLEN);
|
|
else
|
|
hdr->csum_start = __cpu_to_virtio16(little_endian,
|
|
skb_checksum_start_offset(skb));
|
|
hdr->csum_offset = __cpu_to_virtio16(little_endian,
|
|
skb->csum_offset);
|
|
} else if (has_data_valid &&
|
|
skb->ip_summed == CHECKSUM_UNNECESSARY) {
|
|
hdr->flags = VIRTIO_NET_HDR_F_DATA_VALID;
|
|
} /* else everything is zero */
|
|
|
|
return 0;
|
|
}
|
|
|
|
#endif /* _LINUX_VIRTIO_NET_H */
|