gwj / at91sam9263 · Commits

Commit bbe2f399b222f1f2fcf5cd2ea78e4f5c9a66c64e

Authored by Alex Williamson
Committed by Mark McLoughlin
1 parent f10c592e

virtio-net: reorganize receive_filter() 

Reorganize receive_filter to better handle the split between
unicast and multicast filtering.  This allows us to skip the
broadcast check on unicast packets and leads to more opportunities
for optimization.

Signed-off-by: Alex Williamson <alex.williamson@hp.com>
Signed-off-by: Mark McLoughlin <markmc@redhat.com>
Inline Side-by-side
Showing 1 changed file with 11 additions and 8 deletions
hw/virtio-net.c
  View file @bbe2f39
... ... @@ -347,14 +347,17 @@ static int receive_filter(VirtIONet *n, const uint8_t *buf, int size)
347 347 return 0;
348 348 }
349 349  
350   - if ((ptr[0] & 1) && n->allmulti)
351   - return 1;
352   -
353   - if (!memcmp(ptr, bcast, sizeof(bcast)))
354   - return 1;
355   -
356   - if (!memcmp(ptr, n->mac, ETH_ALEN))
357   - return 1;
  350 + if (ptr[0] & 1) { // multicast
  351 + if (!memcmp(ptr, bcast, sizeof(bcast))) {
  352 + return 1;
  353 + } else if (n->allmulti) {
  354 + return 1;
  355 + }
  356 + } else { // unicast
  357 + if (!memcmp(ptr, n->mac, ETH_ALEN)) {
  358 + return 1;
  359 + }
  360 + }
358 361  
359 362 for (i = 0; i < n->mac_table.in_use; i++) {
360 363 if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN))
... ...