From: Zhu Yanjun yanjun.zhu@linux.dev
mainline inclusion from mainline-v5.16-rc6 commit 18451db82ef7 category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I4QOTS CVE: NA
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma.git/commit/?id=184...
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Calculate and set UDP source port based on the flow label. If flow label is not defined in GRH then calculate it based on lqpn/rqpn.
Link: https://lore.kernel.org/r/20220106180359.2915060-2-yanjun.zhu@linux.dev Signed-off-by: Zhu Yanjun yanjun.zhu@linux.dev Reviewed-by: Leon Romanovsky leonro@nvidia.com Signed-off-by: Jason Gunthorpe jgg@nvidia.com sigend-off-by: Guofeng Yue yueguofeng@hisilicon.com
Reviewed-by: Yangyang Li liyangyang20@huawei.com Acked-by: Xie XiuQi xiexiuqi@huawei.com Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- include/rdma/ib_verbs.h | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+)
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h index 3ca7f7c3740a..5aa21b454afc 100644 --- a/include/rdma/ib_verbs.h +++ b/include/rdma/ib_verbs.h @@ -4722,4 +4722,22 @@ static inline u32 rdma_calc_flow_label(u32 lqpn, u32 rqpn)
return (u32)(v & IB_GRH_FLOWLABEL_MASK); } + +/** + * rdma_get_udp_sport - Calculate and set UDP source port based on the flow + * label. If flow label is not defined in GRH then + * calculate it based on lqpn/rqpn. + * + * @fl: flow label from GRH + * @lqpn: local qp number + * @rqpn: remote qp number + */ +static inline u16 rdma_get_udp_sport(u32 fl, u32 lqpn, u32 rqpn) +{ + if (!fl) + fl = rdma_calc_flow_label(lqpn, rqpn); + + return rdma_flow_label_to_udp_sport(fl); +} + #endif /* IB_VERBS_H */