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examples/vhost: fix hard forward of jumbo frames

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Search the right segment to increase its data length, rather than
wrongly early return and exit the tx function, which leads to drop all jumbo frame packets
when vm2vm is in hard forward mode.

Signed-off-by: Changchun Ouyang <changchun.ouyang@intel.com>
This commit is contained in:
Ouyang Changchun 2014-12-10 20:11:47 +08:00 committed by Thomas Monjalon
parent 8bd6c395a5
commit c2ab5162db
1 changed files with 20 additions and 5 deletions
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25
examples/vhost/main.c
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@ -1119,9 +1119,8 @@ virtio_tx_route(struct vhost_dev *vdev, struct rte_mbuf *m, uint16_t vlan_tag)
return;
}
if (vm2vm_mode == VM2VM_HARDWARE) {
if (find_local_dest(dev, m, &offset, &vlan_tag) != 0 ||
offset > rte_pktmbuf_tailroom(m)) {
if (unlikely(vm2vm_mode == VM2VM_HARDWARE)) {
if (unlikely(find_local_dest(dev, m, &offset, &vlan_tag) != 0)) {
rte_pktmbuf_free(m);
return;
}
@ -1135,8 +1134,24 @@ virtio_tx_route(struct vhost_dev *vdev, struct rte_mbuf *m, uint16_t vlan_tag)
m->ol_flags = PKT_TX_VLAN_PKT;
m->data_len += offset;
m->pkt_len += offset;
/*
* Find the right seg to adjust the data len when offset is
* bigger than tail room size.
*/
if (unlikely(vm2vm_mode == VM2VM_HARDWARE)) {
if (likely(offset <= rte_pktmbuf_tailroom(m)))
m->data_len += offset;
else {
struct rte_mbuf *seg = m;
while ((seg->next != NULL) &&
(offset > rte_pktmbuf_tailroom(seg)))
seg = seg->next;
seg->data_len += offset;
}
m->pkt_len += offset;
}
m->vlan_tci = vlan_tag;