[ovs-dev] [PATCH] ofproto-dpif-xlate: Fix a bug.

Alex Wang alexw at nicira.com
Thu May 22 00:27:01 UTC 2014

Commit b256dc525c8 (ofproto-dpif-xlate: Cache xlate_actions() effects.)
caches the variables needed for refreshing mac-learning table in
xlate_normal().  Wherein, the cache entry always records reference to
the original 'ofproto'.

When patch port is used to connect two 'ofproto's, packet goes through the
patch port will have two mac-learning cache entries created for each
'ofproto'.  So, each entry should reference to the corresponding 'ofproto'.
However, due to the bug mentioned above, all cache entries will refer to the
same 'ofproto'.  Subsequently, the mac-learning tables can be corrupted, which
causes connection loss.

This commit fixes the bug by making each cache entry refer to the correct

Signed-off-by: Alex Wang <alexw at nicira.com>
 ofproto/ofproto-dpif-xlate.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ofproto/ofproto-dpif-xlate.c b/ofproto/ofproto-dpif-xlate.c
index a87db54..63b4741 100644
--- a/ofproto/ofproto-dpif-xlate.c
+++ b/ofproto/ofproto-dpif-xlate.c
@@ -1570,7 +1570,7 @@ xlate_normal(struct xlate_ctx *ctx)
         /* Save enough info to update mac learning table later. */
         entry = xlate_cache_add_entry(ctx->xin->xcache, XC_NORMAL);
-        entry->u.normal.ofproto = ctx->xin->ofproto;
+        entry->u.normal.ofproto = ctx->xbridge->ofproto;
         entry->u.normal.flow = xmemdup(flow, sizeof *flow);
         entry->u.normal.vlan = vlan;

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