[dpdk-dev] [PATCH v4 04/12] mbuf: fix rte_pktmbuf_init when mbuf private size is not zero

[Olivier Matz]

Allow the user to use the default rte_pktmbuf_init() function even
if the mbuf private size is not 0.

Signed-off-by: Olivier Matz <olivier.matz at 6wind.com>
---
 lib/librte_mbuf/rte_mbuf.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/lib/librte_mbuf/rte_mbuf.c b/lib/librte_mbuf/rte_mbuf.c
index 231cfb8..d7f0380 100644
--- a/lib/librte_mbuf/rte_mbuf.c
+++ b/lib/librte_mbuf/rte_mbuf.c
@@ -119,16 +119,19 @@ rte_pktmbuf_init(struct rte_mempool *mp,
                 __attribute__((unused)) unsigned i)
 {
        struct rte_mbuf *m = _m;
-       uint32_t buf_len = mp->elt_size - sizeof(struct rte_mbuf);
+       uint32_t mbuf_size, buf_len;

-       RTE_MBUF_ASSERT(mp->elt_size >= sizeof(struct rte_mbuf));
+       mbuf_size = sizeof(struct rte_mbuf) + rte_pktmbuf_priv_size(mp);
+       buf_len = rte_pktmbuf_data_room_size(mp);
+
+       RTE_MBUF_ASSERT(mp->elt_size >= mbuf_size);
+       RTE_MBUF_ASSERT(buf_len <= 0xffff);

        memset(m, 0, mp->elt_size);

        /* start of buffer is just after mbuf structure */
-       m->buf_addr = (char *)m + sizeof(struct rte_mbuf);
-       m->buf_physaddr = rte_mempool_virt2phy(mp, m) +
-                       sizeof(struct rte_mbuf);
+       m->buf_addr = (char *)m + mbuf_size;
+       m->buf_physaddr = rte_mempool_virt2phy(mp, m) + mbuf_size;
        m->buf_len = (uint16_t)buf_len;

        /* keep some headroom between start of buffer and data */
-- 
2.1.4