[PATCH] examples/vhost: use library routines instead of local copies

[Zoltan Kiss <zoltan.kiss-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>]

This macro and function were copies from the mbuf library, no reason to keep
them.

Signed-off-by: Zoltan Kiss <zoltan.kiss-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
---
 examples/vhost/main.c | 38 +++++---------------------------------
 1 file changed, 5 insertions(+), 33 deletions(-)

diff --git a/examples/vhost/main.c b/examples/vhost/main.c
index c3fcb80..1c998a5 100644
--- a/examples/vhost/main.c
+++ b/examples/vhost/main.c
@@ -139,8 +139,6 @@
 /* Number of descriptors per cacheline. */
 #define DESC_PER_CACHELINE (RTE_CACHE_LINE_SIZE / sizeof(struct vring_desc))
 
-#define MBUF_EXT_MEM(mb)   (RTE_MBUF_FROM_BADDR((mb)->buf_addr) != (mb))
-
 /* mask of enabled ports */
 static uint32_t enabled_port_mask = 0;
 
@@ -1538,32 +1536,6 @@ attach_rxmbuf_zcp(struct virtio_net *dev)
 	return;
 }
 
-/*
- * Detach an attched packet mbuf -
- *  - restore original mbuf address and length values.
- *  - reset pktmbuf data and data_len to their default values.
- *  All other fields of the given packet mbuf will be left intact.
- *
- * @param m
- *   The attached packet mbuf.
- */
-static inline void pktmbuf_detach_zcp(struct rte_mbuf *m)
-{
-	const struct rte_mempool *mp = m->pool;
-	void *buf = RTE_MBUF_TO_BADDR(m);
-	uint32_t buf_ofs;
-	uint32_t buf_len = mp->elt_size - sizeof(*m);
-	m->buf_physaddr = rte_mempool_virt2phy(mp, m) + sizeof(*m);
-
-	m->buf_addr = buf;
-	m->buf_len = (uint16_t)buf_len;
-
-	buf_ofs = (RTE_PKTMBUF_HEADROOM <= m->buf_len) ?
-			RTE_PKTMBUF_HEADROOM : m->buf_len;
-	m->data_off = buf_ofs;
-
-	m->data_len = 0;
-}
 
 /*
  * This function is called after packets have been transimited. It fetchs mbuf
@@ -1590,8 +1562,8 @@ txmbuf_clean_zcp(struct virtio_net *dev, struct vpool *vpool)
 
 	for (index = 0; index < mbuf_count; index++) {
 		mbuf = __rte_mbuf_raw_alloc(vpool->pool);
-		if (likely(MBUF_EXT_MEM(mbuf)))
-			pktmbuf_detach_zcp(mbuf);
+		if (likely(RTE_MBUF_INDIRECT(mbuf)))
+			rte_pktmbuf_detach(mbuf);
 		rte_ring_sp_enqueue(vpool->ring, mbuf);
 
 		/* Update used index buffer information. */
@@ -1653,8 +1625,8 @@ static void mbuf_destroy_zcp(struct vpool *vpool)
 	for (index = 0; index < mbuf_count; index++) {
 		mbuf = __rte_mbuf_raw_alloc(vpool->pool);
 		if (likely(mbuf != NULL)) {
-			if (likely(MBUF_EXT_MEM(mbuf)))
-				pktmbuf_detach_zcp(mbuf);
+			if (likely(RTE_MBUF_INDIRECT(mbuf)))
+				rte_pktmbuf_detach(mbuf);
 			rte_ring_sp_enqueue(vpool->ring, (void *)mbuf);
 		}
 	}
@@ -2149,7 +2121,7 @@ switch_worker_zcp(__attribute__((unused)) void *arg)
 					}
 					while (likely(rx_count)) {
 						rx_count--;
-						pktmbuf_detach_zcp(
+						rte_pktmbuf_detach(
 							pkts_burst[rx_count]);
 						rte_ring_sp_enqueue(
 							vpool_array[index].ring,
-- 
1.9.1