[PATCH 2/2] nvme-tcp: add nvme-tcp pdu size build protection

[Sagi Grimberg]

Make sure that we don't somehow mess up the wire structures in the spec.

Signed-off-by: Sagi Grimberg <sagi at grimberg.me>
---
 drivers/nvme/host/tcp.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/nvme/host/tcp.c b/drivers/nvme/host/tcp.c
index c73811907afa..0ec7d3329595 100644
--- a/drivers/nvme/host/tcp.c
+++ b/drivers/nvme/host/tcp.c
@@ -2691,6 +2691,15 @@ static struct nvmf_transport_ops nvme_tcp_transport = {
 
 static int __init nvme_tcp_init_module(void)
 {
+	BUILD_BUG_ON(sizeof(struct nvme_tcp_hdr) != 8);
+	BUILD_BUG_ON(sizeof(struct nvme_tcp_cmd_pdu) != 72);
+	BUILD_BUG_ON(sizeof(struct nvme_tcp_data_pdu) != 24);
+	BUILD_BUG_ON(sizeof(struct nvme_tcp_rsp_pdu) != 24);
+	BUILD_BUG_ON(sizeof(struct nvme_tcp_r2t_pdu) != 24);
+	BUILD_BUG_ON(sizeof(struct nvme_tcp_icreq_pdu) != 128);
+	BUILD_BUG_ON(sizeof(struct nvme_tcp_icresp_pdu) != 128);
+	BUILD_BUG_ON(sizeof(struct nvme_tcp_term_pdu) != 24);
+
 	nvme_tcp_wq = alloc_workqueue("nvme_tcp_wq",
 			WQ_MEM_RECLAIM | WQ_HIGHPRI, 0);
 	if (!nvme_tcp_wq)
-- 
2.34.1