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Release 4.12 include/linux/virtio_net.h

Directory: include/linux
#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; case VIRTIO_NET_HDR_GSO_UDP: gso_type = SKB_GSO_UDP; 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; }

Contributors

PersonTokensPropCommitsCommitProp
Mike Rapoport213100.00%1100.00%
Total213100.00%1100.00%


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 if (sinfo->gso_type & SKB_GSO_UDP) hdr->gso_type = VIRTIO_NET_HDR_GSO_UDP; 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; }

Contributors

PersonTokensPropCommitsCommitProp
Mike Rapoport22290.61%133.33%
Jason (Hui) Wang228.98%133.33%
Jarno Rajahalme10.41%133.33%
Total245100.00%3100.00%

#endif /* _LINUX_VIRTIO_NET_H */

Overall Contributors

PersonTokensPropCommitsCommitProp
Mike Rapoport44994.93%125.00%
Jason (Hui) Wang224.65%125.00%
Jarno Rajahalme20.42%250.00%
Total473100.00%4100.00%
Directory: include/linux
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