Commit 18451db8 authored by Zhu Yanjun's avatar Zhu Yanjun Committed by Jason Gunthorpe
Browse files

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

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>
parent 4d2a3c16

include/rdma/ib_verbs.h

+17 −0
Original line number Diff line number Diff line
@@ -4749,6 +4749,23 @@ 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);

}



const struct ib_port_immutable*

ib_port_immutable_read(struct ib_device *dev, unsigned int port);

#endif /* IB_VERBS_H */