mbuf: enforce alignment of private area

[dpdk.git] / lib / librte_mbuf / rte_mbuf.c

diff --git a/lib/librte_mbuf/rte_mbuf.c b/lib/librte_mbuf/rte_mbuf.c
index 4320dd4..e416312 100644 (file)
--- a/lib/librte_mbuf/rte_mbuf.c
+++ b/lib/librte_mbuf/rte_mbuf.c
@@ -58,6 +58,7 @@
 #include <rte_mbuf.h>
 #include <rte_string_fns.h>
 #include <rte_hexdump.h>
+#include <rte_errno.h>
 
 /*
  * ctrlmbuf constructor, given as a callback function to
@@ -125,6 +126,7 @@ rte_pktmbuf_init(struct rte_mempool *mp,
        mbuf_size = sizeof(struct rte_mbuf) + priv_size;
        buf_len = rte_pktmbuf_data_room_size(mp);
 
+       RTE_MBUF_ASSERT(RTE_ALIGN(priv_size, RTE_MBUF_PRIV_ALIGN) == priv_size);
        RTE_MBUF_ASSERT(mp->elt_size >= mbuf_size);
        RTE_MBUF_ASSERT(buf_len <= UINT16_MAX);
 
@@ -154,7 +156,12 @@ rte_pktmbuf_pool_create(const char *name, unsigned n,
        struct rte_pktmbuf_pool_private mbp_priv;
        unsigned elt_size;
 
-
+       if (RTE_ALIGN(priv_size, RTE_MBUF_PRIV_ALIGN) != priv_size) {
+               RTE_LOG(ERR, MBUF, "mbuf priv_size=%u is not aligned\n",
+                       priv_size);
+               rte_errno = EINVAL;
+               return NULL;
+       }
        elt_size = sizeof(struct rte_mbuf) + (unsigned)priv_size +
                (unsigned)data_room_size;
        mbp_priv.mbuf_data_room_size = data_room_size;