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virtio_net: skb_orphan() and nf_reset() in xmit path. 

The complex transmit free logic was introduced to avoid hangs on
removing the ip_conntrack module and also because drivers aren't
generally supposed to keep stale skbs for unbounded times.

After some debate, it was decided that while doing skb_orphan()
generally is a rat's nest, we can do it in this driver.  Following
patches take advantage of this.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2009-09-24 09:59:17 -06:00
parent a724eada8c
commit 2b5bbe3b8b
1 changed files with 5 additions and 1 deletions
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6
drivers/net/virtio_net.c
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@ -528,8 +528,12 @@ static int xmit_skb(struct virtnet_info *vi, struct sk_buff *skb)
num = skb_to_sgvec(skb, sg+1, 0, skb->len) + 1;
err = vi->svq->vq_ops->add_buf(vi->svq, sg, num, 0, skb);
if (err >= 0 && !vi->free_in_tasklet)
if (err >= 0 && !vi->free_in_tasklet) {
/* Don't wait up for transmitted skbs to be freed. */
skb_orphan(skb);
nf_reset(skb);
mod_timer(&vi->xmit_free_timer, jiffies + (HZ/10));
}
return err;
}