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kni: add build-time checks for mbuf mapping

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Adding this check is to avoid breakage from future data structure changes.

Signed-off-by: Jia Yu <jyu@vmware.com>
Acked-by: Thomas Monjalon <thomas.monjalon@6wind.com>
This commit is contained in:
Jia Yu 2014-11-07 09:49:15 -08:00 committed by Thomas Monjalon
parent 4ffab9b998
commit 5bad0b917e
1 changed files with 15 additions and 0 deletions
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15
lib/librte_kni/rte_kni.c
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@ -595,6 +595,21 @@ kni_allocate_mbufs(struct rte_kni *kni)
int i, ret;
struct rte_mbuf *pkts[MAX_MBUF_BURST_NUM];
RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, pool) !=
offsetof(struct rte_kni_mbuf, pool));
RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, buf_addr) !=
offsetof(struct rte_kni_mbuf, buf_addr));
RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, next) !=
offsetof(struct rte_kni_mbuf, next));
RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, data_off) !=
offsetof(struct rte_kni_mbuf, data_off));
RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, data_len) !=
offsetof(struct rte_kni_mbuf, data_len));
RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, pkt_len) !=
offsetof(struct rte_kni_mbuf, pkt_len));
RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, ol_flags) !=
offsetof(struct rte_kni_mbuf, ol_flags));
/* Check if pktmbuf pool has been configured */
if (kni->pktmbuf_pool == NULL) {
RTE_LOG(ERR, KNI, "No valid mempool for allocating mbufs\n");