Commit f2b1ef7e authored by Zhu Yanjun's avatar Zhu Yanjun Committed by Zheng Zengkai
Browse files

RDMA/core: Calculate UDP source port based on flow label or lqpn/rqpn 

mainline inclusion
from mainline-v5.16-rc6
commit 18451db8
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=18451db82ef7f943c60a7fce685f16172bda5106

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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: default avatarZhu Yanjun <yanjun.zhu@linux.dev>
Reviewed-by: default avatarLeon Romanovsky <leonro@nvidia.com>
Signed-off-by: default avatarJason Gunthorpe <jgg@nvidia.com>
sigend-off-by: default avatarGuofeng Yue <yueguofeng@hisilicon.com>

Reviewed-by: default avatarYangyang Li <liyangyang20@huawei.com>
Acked-by: default avatarXie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: default avatarZheng Zengkai <zhengzengkai@huawei.com>
parent 17394cb7

include/rdma/ib_verbs.h

+18 −0
Original line number Diff line number Diff line
@@ -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 */