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Commit 3e7fb80b authored by David S. Miller's avatar David S. Miller
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Merge branch 'virtio_net-GSO-helpers' 

Mike Rapoport says:

====================
virtio_net: use common code for virtio_net_hdr and skb GSO conversion

This patches introduce virtio_net_hdr_{from,to}_skb functions for
conversion of GSO information between skb and virtio_net_hdr.
====================
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parents 231edca9 1276f24e
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Showing with 143 additions and 270 deletions
drivers/net/macvtap.c
View file @ 3e7fb80b
...@@ -627,93 +627,6 @@ static inline struct sk_buff *macvtap_alloc_skb(struct sock *sk, size_t prepad, ...@@ -627,93 +627,6 @@ static inline struct sk_buff *macvtap_alloc_skb(struct sock *sk, size_t prepad,
return skb; return skb;
} }
/*
* macvtap_skb_from_vnet_hdr and macvtap_skb_to_vnet_hdr should
* be shared with the tun/tap driver.
*/
static int macvtap_skb_from_vnet_hdr(struct macvtap_queue *q,
struct sk_buff *skb,
struct virtio_net_hdr *vnet_hdr)
{
unsigned short gso_type = 0;
if (vnet_hdr->gso_type != VIRTIO_NET_HDR_GSO_NONE) {
switch (vnet_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 (vnet_hdr->gso_type & VIRTIO_NET_HDR_GSO_ECN)
gso_type |= SKB_GSO_TCP_ECN;
if (vnet_hdr->gso_size == 0)
return -EINVAL;
}
if (vnet_hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) {
if (!skb_partial_csum_set(skb, macvtap16_to_cpu(q, vnet_hdr->csum_start),
macvtap16_to_cpu(q, vnet_hdr->csum_offset)))
return -EINVAL;
}
if (vnet_hdr->gso_type != VIRTIO_NET_HDR_GSO_NONE) {
skb_shinfo(skb)->gso_size = macvtap16_to_cpu(q, vnet_hdr->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 void macvtap_skb_to_vnet_hdr(struct macvtap_queue *q,
const struct sk_buff *skb,
struct virtio_net_hdr *vnet_hdr)
{
memset(vnet_hdr, 0, sizeof(*vnet_hdr));
if (skb_is_gso(skb)) {
struct skb_shared_info *sinfo = skb_shinfo(skb);
/* This is a hint as to how much should be linear. */
vnet_hdr->hdr_len = cpu_to_macvtap16(q, skb_headlen(skb));
vnet_hdr->gso_size = cpu_to_macvtap16(q, sinfo->gso_size);
if (sinfo->gso_type & SKB_GSO_TCPV4)
vnet_hdr->gso_type = VIRTIO_NET_HDR_GSO_TCPV4;
else if (sinfo->gso_type & SKB_GSO_TCPV6)
vnet_hdr->gso_type = VIRTIO_NET_HDR_GSO_TCPV6;
else if (sinfo->gso_type & SKB_GSO_UDP)
vnet_hdr->gso_type = VIRTIO_NET_HDR_GSO_UDP;
else
BUG();
if (sinfo->gso_type & SKB_GSO_TCP_ECN)
vnet_hdr->gso_type |= VIRTIO_NET_HDR_GSO_ECN;
} else
vnet_hdr->gso_type = VIRTIO_NET_HDR_GSO_NONE;
if (skb->ip_summed == CHECKSUM_PARTIAL) {
vnet_hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
if (skb_vlan_tag_present(skb))
vnet_hdr->csum_start = cpu_to_macvtap16(q,
skb_checksum_start_offset(skb) + VLAN_HLEN);
else
vnet_hdr->csum_start = cpu_to_macvtap16(q,
skb_checksum_start_offset(skb));
vnet_hdr->csum_offset = cpu_to_macvtap16(q, skb->csum_offset);
} else if (skb->ip_summed == CHECKSUM_UNNECESSARY) {
vnet_hdr->flags = VIRTIO_NET_HDR_F_DATA_VALID;
} /* else everything is zero */
}
/* Neighbour code has some assumptions on HH_DATA_MOD alignment */ /* Neighbour code has some assumptions on HH_DATA_MOD alignment */
#define MACVTAP_RESERVE HH_DATA_OFF(ETH_HLEN) #define MACVTAP_RESERVE HH_DATA_OFF(ETH_HLEN)
...@@ -812,7 +725,8 @@ static ssize_t macvtap_get_user(struct macvtap_queue *q, struct msghdr *m, ...@@ -812,7 +725,8 @@ static ssize_t macvtap_get_user(struct macvtap_queue *q, struct msghdr *m,
skb->protocol = eth_hdr(skb)->h_proto; skb->protocol = eth_hdr(skb)->h_proto;
if (vnet_hdr_len) { if (vnet_hdr_len) {
err = macvtap_skb_from_vnet_hdr(q, skb, &vnet_hdr); err = virtio_net_hdr_to_skb(skb, &vnet_hdr,
macvtap_is_little_endian(q));
if (err) if (err)
goto err_kfree; goto err_kfree;
} }
...@@ -880,7 +794,10 @@ static ssize_t macvtap_put_user(struct macvtap_queue *q, ...@@ -880,7 +794,10 @@ static ssize_t macvtap_put_user(struct macvtap_queue *q,
if (iov_iter_count(iter) < vnet_hdr_len) if (iov_iter_count(iter) < vnet_hdr_len)
return -EINVAL; return -EINVAL;
macvtap_skb_to_vnet_hdr(q, skb, &vnet_hdr); ret = virtio_net_hdr_from_skb(skb, &vnet_hdr,
macvtap_is_little_endian(q));
if (ret)
BUG();
if (copy_to_iter(&vnet_hdr, sizeof(vnet_hdr), iter) != if (copy_to_iter(&vnet_hdr, sizeof(vnet_hdr), iter) !=
sizeof(vnet_hdr)) sizeof(vnet_hdr))
......
drivers/net/tun.c
View file @ 3e7fb80b
...@@ -1254,15 +1254,6 @@ static ssize_t tun_get_user(struct tun_struct *tun, struct tun_file *tfile, ...@@ -1254,15 +1254,6 @@ static ssize_t tun_get_user(struct tun_struct *tun, struct tun_file *tfile,
return -EFAULT; return -EFAULT;
} }
if (gso.flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) {
if (!skb_partial_csum_set(skb, tun16_to_cpu(tun, gso.csum_start),
tun16_to_cpu(tun, gso.csum_offset))) {
this_cpu_inc(tun->pcpu_stats->rx_frame_errors);
kfree_skb(skb);
return -EINVAL;
}
}
switch (tun->flags & TUN_TYPE_MASK) { switch (tun->flags & TUN_TYPE_MASK) {
case IFF_TUN: case IFF_TUN:
if (tun->flags & IFF_NO_PI) { if (tun->flags & IFF_NO_PI) {
...@@ -1289,37 +1280,11 @@ static ssize_t tun_get_user(struct tun_struct *tun, struct tun_file *tfile, ...@@ -1289,37 +1280,11 @@ static ssize_t tun_get_user(struct tun_struct *tun, struct tun_file *tfile,
break; break;
} }
if (gso.gso_type != VIRTIO_NET_HDR_GSO_NONE) { err = virtio_net_hdr_to_skb(skb, &gso, tun_is_little_endian(tun));
pr_debug("GSO!\n"); if (err) {
switch (gso.gso_type & ~VIRTIO_NET_HDR_GSO_ECN) { this_cpu_inc(tun->pcpu_stats->rx_frame_errors);
case VIRTIO_NET_HDR_GSO_TCPV4: kfree_skb(skb);
skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4; return -EINVAL;
break;
case VIRTIO_NET_HDR_GSO_TCPV6:
skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
break;
case VIRTIO_NET_HDR_GSO_UDP:
skb_shinfo(skb)->gso_type = SKB_GSO_UDP;
break;
default:
this_cpu_inc(tun->pcpu_stats->rx_frame_errors);
kfree_skb(skb);
return -EINVAL;
}
if (gso.gso_type & VIRTIO_NET_HDR_GSO_ECN)
skb_shinfo(skb)->gso_type |= SKB_GSO_TCP_ECN;
skb_shinfo(skb)->gso_size = tun16_to_cpu(tun, gso.gso_size);
if (skb_shinfo(skb)->gso_size == 0) {
this_cpu_inc(tun->pcpu_stats->rx_frame_errors);
kfree_skb(skb);
return -EINVAL;
}
/* Header must be checked, and gso_segs computed. */
skb_shinfo(skb)->gso_type |= SKB_GSO_DODGY;
skb_shinfo(skb)->gso_segs = 0;
} }
/* copy skb_ubuf_info for callback when skb has no error */ /* copy skb_ubuf_info for callback when skb has no error */
...@@ -1399,46 +1364,26 @@ static ssize_t tun_put_user(struct tun_struct *tun, ...@@ -1399,46 +1364,26 @@ static ssize_t tun_put_user(struct tun_struct *tun,
if (vnet_hdr_sz) { if (vnet_hdr_sz) {
struct virtio_net_hdr gso = { 0 }; /* no info leak */ struct virtio_net_hdr gso = { 0 }; /* no info leak */
int ret;
if (iov_iter_count(iter) < vnet_hdr_sz) if (iov_iter_count(iter) < vnet_hdr_sz)
return -EINVAL; return -EINVAL;
if (skb_is_gso(skb)) { ret = virtio_net_hdr_from_skb(skb, &gso,
tun_is_little_endian(tun));
if (ret) {
struct skb_shared_info *sinfo = skb_shinfo(skb); struct skb_shared_info *sinfo = skb_shinfo(skb);
pr_err("unexpected GSO type: "
/* This is a hint as to how much should be linear. */ "0x%x, gso_size %d, hdr_len %d\n",
gso.hdr_len = cpu_to_tun16(tun, skb_headlen(skb)); sinfo->gso_type, tun16_to_cpu(tun, gso.gso_size),
gso.gso_size = cpu_to_tun16(tun, sinfo->gso_size); tun16_to_cpu(tun, gso.hdr_len));
if (sinfo->gso_type & SKB_GSO_TCPV4) print_hex_dump(KERN_ERR, "tun: ",
gso.gso_type = VIRTIO_NET_HDR_GSO_TCPV4; DUMP_PREFIX_NONE,
else if (sinfo->gso_type & SKB_GSO_TCPV6) 16, 1, skb->head,
gso.gso_type = VIRTIO_NET_HDR_GSO_TCPV6; min((int)tun16_to_cpu(tun, gso.hdr_len), 64), true);
else if (sinfo->gso_type & SKB_GSO_UDP) WARN_ON_ONCE(1);
gso.gso_type = VIRTIO_NET_HDR_GSO_UDP; return -EINVAL;
else { }
pr_err("unexpected GSO type: "
"0x%x, gso_size %d, hdr_len %d\n",
sinfo->gso_type, tun16_to_cpu(tun, gso.gso_size),
tun16_to_cpu(tun, gso.hdr_len));
print_hex_dump(KERN_ERR, "tun: ",
DUMP_PREFIX_NONE,
16, 1, skb->head,
min((int)tun16_to_cpu(tun, gso.hdr_len), 64), true);
WARN_ON_ONCE(1);
return -EINVAL;
}
if (sinfo->gso_type & SKB_GSO_TCP_ECN)
gso.gso_type |= VIRTIO_NET_HDR_GSO_ECN;
} else
gso.gso_type = VIRTIO_NET_HDR_GSO_NONE;
if (skb->ip_summed == CHECKSUM_PARTIAL) {
gso.flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
gso.csum_start = cpu_to_tun16(tun, skb_checksum_start_offset(skb) +
vlan_hlen);
gso.csum_offset = cpu_to_tun16(tun, skb->csum_offset);
} else if (skb->ip_summed == CHECKSUM_UNNECESSARY) {
gso.flags = VIRTIO_NET_HDR_F_DATA_VALID;
} /* else everything is zero */
if (copy_to_iter(&gso, sizeof(gso), iter) != sizeof(gso)) if (copy_to_iter(&gso, sizeof(gso), iter) != sizeof(gso))
return -EFAULT; return -EFAULT;
......
drivers/net/virtio_net.c
View file @ 3e7fb80b
...@@ -479,51 +479,19 @@ static void receive_buf(struct virtnet_info *vi, struct receive_queue *rq, ...@@ -479,51 +479,19 @@ static void receive_buf(struct virtnet_info *vi, struct receive_queue *rq,
stats->rx_packets++; stats->rx_packets++;
u64_stats_update_end(&stats->rx_syncp); u64_stats_update_end(&stats->rx_syncp);
if (hdr->hdr.flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) { if (hdr->hdr.flags & VIRTIO_NET_HDR_F_DATA_VALID)
pr_debug("Needs csum!\n");
if (!skb_partial_csum_set(skb,
virtio16_to_cpu(vi->vdev, hdr->hdr.csum_start),
virtio16_to_cpu(vi->vdev, hdr->hdr.csum_offset)))
goto frame_err;
} else if (hdr->hdr.flags & VIRTIO_NET_HDR_F_DATA_VALID) {
skb->ip_summed = CHECKSUM_UNNECESSARY; skb->ip_summed = CHECKSUM_UNNECESSARY;
}
skb->protocol = eth_type_trans(skb, dev); skb->protocol = eth_type_trans(skb, dev);
pr_debug("Receiving skb proto 0x%04x len %i type %i\n", pr_debug("Receiving skb proto 0x%04x len %i type %i\n",
ntohs(skb->protocol), skb->len, skb->pkt_type); ntohs(skb->protocol), skb->len, skb->pkt_type);
if (hdr->hdr.gso_type != VIRTIO_NET_HDR_GSO_NONE) { if (virtio_net_hdr_to_skb(skb, &hdr->hdr,
pr_debug("GSO!\n"); virtio_is_little_endian(vi->vdev))) {
switch (hdr->hdr.gso_type & ~VIRTIO_NET_HDR_GSO_ECN) { net_warn_ratelimited("%s: bad gso: type: %u, size: %u\n",
case VIRTIO_NET_HDR_GSO_TCPV4: dev->name, hdr->hdr.gso_type,
skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4; hdr->hdr.gso_size);
break; goto frame_err;
case VIRTIO_NET_HDR_GSO_UDP:
skb_shinfo(skb)->gso_type = SKB_GSO_UDP;
break;
case VIRTIO_NET_HDR_GSO_TCPV6:
skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
break;
default:
net_warn_ratelimited("%s: bad gso type %u.\n",
dev->name, hdr->hdr.gso_type);
goto frame_err;
}
if (hdr->hdr.gso_type & VIRTIO_NET_HDR_GSO_ECN)
skb_shinfo(skb)->gso_type |= SKB_GSO_TCP_ECN;
skb_shinfo(skb)->gso_size = virtio16_to_cpu(vi->vdev,
hdr->hdr.gso_size);
if (skb_shinfo(skb)->gso_size == 0) {
net_warn_ratelimited("%s: zero gso size.\n", dev->name);
goto frame_err;
}
/* Header must be checked, and gso_segs computed. */
skb_shinfo(skb)->gso_type |= SKB_GSO_DODGY;
skb_shinfo(skb)->gso_segs = 0;
} }
napi_gro_receive(&rq->napi, skb); napi_gro_receive(&rq->napi, skb);
...@@ -868,35 +836,9 @@ static int xmit_skb(struct send_queue *sq, struct sk_buff *skb) ...@@ -868,35 +836,9 @@ static int xmit_skb(struct send_queue *sq, struct sk_buff *skb)
else else
hdr = skb_vnet_hdr(skb); hdr = skb_vnet_hdr(skb);
if (skb->ip_summed == CHECKSUM_PARTIAL) { if (virtio_net_hdr_from_skb(skb, &hdr->hdr,
hdr->hdr.flags = VIRTIO_NET_HDR_F_NEEDS_CSUM; virtio_is_little_endian(vi->vdev)))
hdr->hdr.csum_start = cpu_to_virtio16(vi->vdev, BUG();
skb_checksum_start_offset(skb));
hdr->hdr.csum_offset = cpu_to_virtio16(vi->vdev,
skb->csum_offset);
} else {
hdr->hdr.flags = 0;
hdr->hdr.csum_offset = hdr->hdr.csum_start = 0;
}
if (skb_is_gso(skb)) {
hdr->hdr.hdr_len = cpu_to_virtio16(vi->vdev, skb_headlen(skb));
hdr->hdr.gso_size = cpu_to_virtio16(vi->vdev,
skb_shinfo(skb)->gso_size);
if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV4)
hdr->hdr.gso_type = VIRTIO_NET_HDR_GSO_TCPV4;
else if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
hdr->hdr.gso_type = VIRTIO_NET_HDR_GSO_TCPV6;
else if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP)
hdr->hdr.gso_type = VIRTIO_NET_HDR_GSO_UDP;
else
BUG();
if (skb_shinfo(skb)->gso_type & SKB_GSO_TCP_ECN)
hdr->hdr.gso_type |= VIRTIO_NET_HDR_GSO_ECN;
} else {
hdr->hdr.gso_type = VIRTIO_NET_HDR_GSO_NONE;
hdr->hdr.gso_size = hdr->hdr.hdr_len = 0;
}
if (vi->mergeable_rx_bufs) if (vi->mergeable_rx_bufs)
hdr->num_buffers = 0; hdr->num_buffers = 0;
......
include/linux/virtio_net.h 0 → 100644
View file @ 3e7fb80b
#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;
}
static inline int virtio_net_hdr_from_skb(const struct sk_buff *skb,
struct virtio_net_hdr *hdr,
bool little_endian)
{
memset(hdr, 0, sizeof(*hdr));
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 (skb->ip_summed == CHECKSUM_UNNECESSARY) {
hdr->flags = VIRTIO_NET_HDR_F_DATA_VALID;
} /* else everything is zero */
return 0;
}
#endif /* _LINUX_VIRTIO_BYTEORDER */
include/uapi/linux/virtio_net.h
View file @ 3e7fb80b
#ifndef _LINUX_VIRTIO_NET_H #ifndef _UAPI_LINUX_VIRTIO_NET_H
#define _LINUX_VIRTIO_NET_H #define _UAPI_LINUX_VIRTIO_NET_H
/* This header is BSD licensed so anyone can use the definitions to implement /* This header is BSD licensed so anyone can use the definitions to implement
* compatible drivers/servers. * compatible drivers/servers.
* *
...@@ -245,4 +245,4 @@ struct virtio_net_ctrl_mq { ...@@ -245,4 +245,4 @@ struct virtio_net_ctrl_mq {
#define VIRTIO_NET_CTRL_GUEST_OFFLOADS 5 #define VIRTIO_NET_CTRL_GUEST_OFFLOADS 5
#define VIRTIO_NET_CTRL_GUEST_OFFLOADS_SET 0 #define VIRTIO_NET_CTRL_GUEST_OFFLOADS_SET 0
#endif /* _LINUX_VIRTIO_NET_H */ #endif /* _UAPI_LINUX_VIRTIO_NET_H */
net/packet/af_packet.c
View file @ 3e7fb80b
...@@ -1979,40 +1979,8 @@ static int __packet_rcv_vnet(const struct sk_buff *skb, ...@@ -1979,40 +1979,8 @@ static int __packet_rcv_vnet(const struct sk_buff *skb,
{ {
*vnet_hdr = (const struct virtio_net_hdr) { 0 }; *vnet_hdr = (const struct virtio_net_hdr) { 0 };
if (skb_is_gso(skb)) { if (virtio_net_hdr_from_skb(skb, vnet_hdr, vio_le()))
struct skb_shared_info *sinfo = skb_shinfo(skb); BUG();
/* This is a hint as to how much should be linear. */
vnet_hdr->hdr_len =
__cpu_to_virtio16(vio_le(), skb_headlen(skb));
vnet_hdr->gso_size =
__cpu_to_virtio16(vio_le(), sinfo->gso_size);
if (sinfo->gso_type & SKB_GSO_TCPV4)
vnet_hdr->gso_type = VIRTIO_NET_HDR_GSO_TCPV4;
else if (sinfo->gso_type & SKB_GSO_TCPV6)
vnet_hdr->gso_type = VIRTIO_NET_HDR_GSO_TCPV6;
else if (sinfo->gso_type & SKB_GSO_UDP)
vnet_hdr->gso_type = VIRTIO_NET_HDR_GSO_UDP;
else if (sinfo->gso_type & SKB_GSO_FCOE)
return -EINVAL;
else
BUG();
if (sinfo->gso_type & SKB_GSO_TCP_ECN)
vnet_hdr->gso_type |= VIRTIO_NET_HDR_GSO_ECN;
} else
vnet_hdr->gso_type = VIRTIO_NET_HDR_GSO_NONE;
if (skb->ip_summed == CHECKSUM_PARTIAL) {
vnet_hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
vnet_hdr->csum_start = __cpu_to_virtio16(vio_le(),
skb_checksum_start_offset(skb));
vnet_hdr->csum_offset = __cpu_to_virtio16(vio_le(),
skb->csum_offset);
} else if (skb->ip_summed == CHECKSUM_UNNECESSARY) {
vnet_hdr->flags = VIRTIO_NET_HDR_F_DATA_VALID;
} /* else everything is zero */
return 0; return 0;
} }
......
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