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virtio-net support

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This adds virtio-net support.  This is based on the virtio-net driver 
that exists in kvm-userspace.  This also adds a new qemu_sendv_packet 
which virtio-net requires.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>



git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6073 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
aliguori
2008-12-17 19:13:11 +00:00
parent fc9902d9c7
commit fbe78f4f55
6 changed files with 466 additions and 3 deletions
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44
net.c
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@@ -369,6 +369,50 @@ void qemu_send_packet(VLANClientState *vc1, const uint8_t *buf, int size)
}
}
static ssize_t vc_sendv_compat(VLANClientState *vc, const struct iovec *iov,
int iovcnt)
{
uint8_t buffer[4096];
size_t offset = 0;
int i;
for (i = 0; i < iovcnt; i++) {
size_t len;
len = MIN(sizeof(buffer) - offset, iov[i].iov_len);
memcpy(buffer + offset, iov[i].iov_base, len);
offset += len;
}
vc->fd_read(vc->opaque, buffer, offset);
return offset;
}
ssize_t qemu_sendv_packet(VLANClientState *vc1, const struct iovec *iov,
int iovcnt)
{
VLANState *vlan = vc1->vlan;
VLANClientState *vc;
ssize_t max_len = 0;
for (vc = vlan->first_client; vc != NULL; vc = vc->next) {
ssize_t len = 0;
if (vc == vc1)
continue;
if (vc->fd_readv)
len = vc->fd_readv(vc->opaque, iov, iovcnt);
else if (vc->fd_read)
len = vc_sendv_compat(vc, iov, iovcnt);
max_len = MAX(max_len, len);
}
return max_len;
}
#if defined(CONFIG_SLIRP)
/* slirp network adapter */