mirror of
https://github.com/torvalds/linux.git
synced 2024-12-17 00:21:32 +00:00
virtio_net: unconditionally define struct virtio_net_hdr_v1.
This was introduced in commit ed9ecb0415
,
but only defined if !VIRTIO_NET_NO_LEGACY. We should always define
it: easier for users to have conditional legacy code.
Suggested-by: "Michael S. Tsirkin" <mst@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
parent
206ad06b2e
commit
e68c48f975
@ -74,39 +74,12 @@ struct virtio_net_config {
|
||||
__u16 max_virtqueue_pairs;
|
||||
} __attribute__((packed));
|
||||
|
||||
#ifndef VIRTIO_NET_NO_LEGACY
|
||||
/* This header comes first in the scatter-gather list.
|
||||
* For legacy virtio, if VIRTIO_F_ANY_LAYOUT is not negotiated, it must
|
||||
* be the first element of the scatter-gather list. If you don't
|
||||
* specify GSO or CSUM features, you can simply ignore the header. */
|
||||
struct virtio_net_hdr {
|
||||
#define VIRTIO_NET_HDR_F_NEEDS_CSUM 1 // Use csum_start, csum_offset
|
||||
#define VIRTIO_NET_HDR_F_DATA_VALID 2 // Csum is valid
|
||||
__u8 flags;
|
||||
#define VIRTIO_NET_HDR_GSO_NONE 0 // Not a GSO frame
|
||||
#define VIRTIO_NET_HDR_GSO_TCPV4 1 // GSO frame, IPv4 TCP (TSO)
|
||||
#define VIRTIO_NET_HDR_GSO_UDP 3 // GSO frame, IPv4 UDP (UFO)
|
||||
#define VIRTIO_NET_HDR_GSO_TCPV6 4 // GSO frame, IPv6 TCP
|
||||
#define VIRTIO_NET_HDR_GSO_ECN 0x80 // TCP has ECN set
|
||||
__u8 gso_type;
|
||||
__virtio16 hdr_len; /* Ethernet + IP + tcp/udp hdrs */
|
||||
__virtio16 gso_size; /* Bytes to append to hdr_len per frame */
|
||||
__virtio16 csum_start; /* Position to start checksumming from */
|
||||
__virtio16 csum_offset; /* Offset after that to place checksum */
|
||||
};
|
||||
|
||||
/* This is the version of the header to use when the MRG_RXBUF
|
||||
* feature has been negotiated. */
|
||||
struct virtio_net_hdr_mrg_rxbuf {
|
||||
struct virtio_net_hdr hdr;
|
||||
__virtio16 num_buffers; /* Number of merged rx buffers */
|
||||
};
|
||||
#else /* ... VIRTIO_NET_NO_LEGACY */
|
||||
/*
|
||||
* This header comes first in the scatter-gather list. If you don't
|
||||
* specify GSO or CSUM features, you can simply ignore the header.
|
||||
*
|
||||
* This is bitwise-equivalent to the legacy struct virtio_net_hdr_mrg_rxbuf.
|
||||
* This is bitwise-equivalent to the legacy struct virtio_net_hdr_mrg_rxbuf,
|
||||
* only flattened.
|
||||
*/
|
||||
struct virtio_net_hdr_v1 {
|
||||
#define VIRTIO_NET_HDR_F_NEEDS_CSUM 1 /* Use csum_start, csum_offset */
|
||||
@ -124,6 +97,29 @@ struct virtio_net_hdr_v1 {
|
||||
__virtio16 csum_offset; /* Offset after that to place checksum */
|
||||
__virtio16 num_buffers; /* Number of merged rx buffers */
|
||||
};
|
||||
|
||||
#ifndef VIRTIO_NET_NO_LEGACY
|
||||
/* This header comes first in the scatter-gather list.
|
||||
* For legacy virtio, if VIRTIO_F_ANY_LAYOUT is not negotiated, it must
|
||||
* be the first element of the scatter-gather list. If you don't
|
||||
* specify GSO or CSUM features, you can simply ignore the header. */
|
||||
struct virtio_net_hdr {
|
||||
/* See VIRTIO_NET_HDR_F_* */
|
||||
__u8 flags;
|
||||
/* See VIRTIO_NET_HDR_GSO_* */
|
||||
__u8 gso_type;
|
||||
__virtio16 hdr_len; /* Ethernet + IP + tcp/udp hdrs */
|
||||
__virtio16 gso_size; /* Bytes to append to hdr_len per frame */
|
||||
__virtio16 csum_start; /* Position to start checksumming from */
|
||||
__virtio16 csum_offset; /* Offset after that to place checksum */
|
||||
};
|
||||
|
||||
/* This is the version of the header to use when the MRG_RXBUF
|
||||
* feature has been negotiated. */
|
||||
struct virtio_net_hdr_mrg_rxbuf {
|
||||
struct virtio_net_hdr hdr;
|
||||
__virtio16 num_buffers; /* Number of merged rx buffers */
|
||||
};
|
||||
#endif /* ...VIRTIO_NET_NO_LEGACY */
|
||||
|
||||
/*
|
||||
|
Loading…
Reference in New Issue
Block a user