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Mon, 1 May 2017 06:40:56 +0000 From: Jerin Jacob To: dev@dpdk.org Cc: thomas@monjalon.net, olivier.matz@6wind.com, bruce.richardson@intel.com, Jerin Jacob Date: Mon, 1 May 2017 12:10:18 +0530 Message-Id: <20170501064018.5796-1-jerin.jacob@caviumnetworks.com> X-Mailer: git-send-email 2.12.2 MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [171.76.125.157] X-ClientProxiedBy: MA1PR01CA0102.INDPRD01.PROD.OUTLOOK.COM (10.174.56.146) To BN3PR0701MB1719.namprd07.prod.outlook.com (10.163.39.18) X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 6f430e21-f22e-48c9-c4bf-08d4905d06a0 X-Microsoft-Antispam: UriScan:; BCL:0; PCL:0; RULEID:(22001)(201703131423075)(201703031133081); SRVR:BN3PR0701MB1719; X-Microsoft-Exchange-Diagnostics: 1; BN3PR0701MB1719; 3:kqXBZNFUTAUvsrFRpmwDQhFKO3Q+73YU8Czgi8gRLnWceB7BcniTyzOFormPW6cIjTbPJf1juvpBdc5Xet4A4X17p+HEslfp4+ARUfyS+dMpzFSRPhy2y1KQ9ZP4iUhhz2YQtifdzvO1IQKVLMC1mH/p1aUYdPKNJlrVAPv/IwYmxm/+TTtaEiecJFOwXqJyLaq1rKUr5ITMLNnx7SDszxt7vLE0s2OwjodYAH8J4zV554s8vyGNO9cGzHcNJkVjq3Pvxd/RqmGB/FkGGv+kuOipI1tVDFFx8n7gUVVYma5Xgq6W3EA18QJHk1X5X6hw3zAR6ZvyzIoYS7K/Pf2D1g==; 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Add in some compile-time checks to make sure the mbuf layout assumptions are valid, and to provide hints to anyone changing the mbuf where things may need to be updated. Signed-off-by: Jerin Jacob --- - As previously discussed*, add some compile time checks to the pmds to help sanity-check their dependencies on the mbuf layout. * http://dpdk.org/ml/archives/dev/2017-April/064988.html - Targeted for v17.08 --- drivers/net/thunderx/nicvf_ethdev.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/net/thunderx/nicvf_ethdev.c b/drivers/net/thunderx/nicvf_ethdev.c index e4910c9b3..ddcfabaf7 100644 --- a/drivers/net/thunderx/nicvf_ethdev.c +++ b/drivers/net/thunderx/nicvf_ethdev.c @@ -1239,6 +1239,13 @@ nicvf_rxq_mbuf_setup(struct nicvf_rxq *rxq) struct rte_mbuf mb_def; RTE_BUILD_BUG_ON(sizeof(union mbuf_initializer) != 8); + RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, data_off) % 8 != 0); + RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, refcnt) - + offsetof(struct rte_mbuf, data_off) != 2); + RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, nb_segs) - + offsetof(struct rte_mbuf, data_off) != 4); + RTE_BUILD_BUG_ON(offsetof(struct rte_mbuf, port) - + offsetof(struct rte_mbuf, data_off) != 6); mb_def.nb_segs = 1; mb_def.data_off = RTE_PKTMBUF_HEADROOM; mb_def.port = rxq->port_id; -- 2.12.2