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core, nfqueue, openvswitch: Orphan frags in skb_zerocopy and handle errors

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skb_zerocopy can copy elements of the frags array between skbs, but it doesn't
orphan them. Also, it doesn't handle errors, so this patch takes care of that
as well, and modify the callers accordingly. skb_tx_error() is also added to
the callers so they will signal the failed delivery towards the creator of the
skb.

Signed-off-by: Zoltan Kiss <zoltan.kiss@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Zoltan Kiss 2014-03-26 22:37:45 +00:00 • committed by David S. Miller
parent fc0d48b8fb
commit 36d5fe6a00
4 changed files with 34 additions and 12 deletions
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6
net/openvswitch/datapath.c
View file

@ -464,7 +464,9 @@ static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb,
}
nla->nla_len = nla_attr_size(skb->len);
skb_zerocopy(user_skb, skb, skb->len, hlen);
err = skb_zerocopy(user_skb, skb, skb->len, hlen);
if (err)
goto out;
/* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */
if (!(dp->user_features & OVS_DP_F_UNALIGNED)) {
@ -478,6 +480,8 @@ static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb,
err = genlmsg_unicast(ovs_dp_get_net(dp), user_skb, upcall_info->portid);
out:
if (err)
skb_tx_error(skb);
kfree_skb(nskb);
return err;
}