Previously, DPDK buffers were freed using 'struct ofpbuf' pointers
passed to free_dpdk_buf(). However, if a new ofpbuf allocated on the
stack shares data with the old ofpbuf and the new ofpbuf is to be
freed with free_dpdk_buf(), this will cause an error.
This patch gets the beginning of the allocated buffer from 'struct
rte_mbuf'. This allows ofpbufs to share packet data when using DPDK.
Signed-off-by: Ryan Wilson <wr...@nicira.com>
---
lib/netdev-dpdk.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/lib/netdev-dpdk.c b/lib/netdev-dpdk.c
index ba41d2e..155cbf0 100644
--- a/lib/netdev-dpdk.c
+++ b/lib/netdev-dpdk.c
@@ -206,8 +206,9 @@ void
free_dpdk_buf(struct ofpbuf *b)
{
struct rte_mbuf *pkt = (struct rte_mbuf *) b;
+ struct rte_mbuf *buf = (char *) pkt->buf_addr - sizeof(struct ofpbuf);
- rte_mempool_put(pkt->pool, pkt);
+ rte_mempool_put(pkt->pool, buf);
}
static void
--
1.7.9.5
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