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Commit 2dee0e54 authored by Yishai Hadas's avatar Yishai Hadas Committed by Doug Ledford
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IB/uverbs: Enable QP creation with a given source QP number 



Enable QP creation with a given source QP number, the created QP will
use the source QPN as its wire QP number.

To create such a QP, root privileges (i.e. CAP_NET_RAW) are required
from the user application.

This comes as a pre-patch for downstream patches in this series to
allow user space applications to accelerate traffic which is typically
handled by IPoIB ULP.

Signed-off-by: default avatarYishai Hadas <yishaih@mellanox.com>
Reviewed-by: default avatarMaor Gottlieb <maorg@mellanox.com>
Signed-off-by: default avatarLeon Romanovsky <leon@kernel.org>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent 02984cc7

drivers/infiniband/core/uverbs_cmd.c

+14 −3
Original line number Diff line number Diff line
@@ -1383,8 +1383,9 @@ static int create_qp(struct ib_uverbs_file *file, 
		attr.rwq_ind_tbl = ind_tbl;

	}



	if ((cmd_sz >= offsetof(typeof(*cmd), reserved1) +

		       sizeof(cmd->reserved1)) && cmd->reserved1) {

	if (cmd_sz > sizeof(*cmd) &&

	    !ib_is_udata_cleared(ucore, sizeof(*cmd),

				 cmd_sz - sizeof(*cmd))) {

		ret = -EOPNOTSUPP;

		goto err_put;

	}
@@ -1482,11 +1483,21 @@ static int create_qp(struct ib_uverbs_file *file, 
				IB_QP_CREATE_MANAGED_SEND |

				IB_QP_CREATE_MANAGED_RECV |

				IB_QP_CREATE_SCATTER_FCS |

				IB_QP_CREATE_CVLAN_STRIPPING)) {

				IB_QP_CREATE_CVLAN_STRIPPING |

				IB_QP_CREATE_SOURCE_QPN)) {

		ret = -EINVAL;

		goto err_put;

	}



	if (attr.create_flags & IB_QP_CREATE_SOURCE_QPN) {

		if (!capable(CAP_NET_RAW)) {

			ret = -EPERM;

			goto err_put;

		}



		attr.source_qpn = cmd->source_qpn;

	}



	buf = (void *)cmd + sizeof(*cmd);

	if (cmd_sz > sizeof(*cmd))

		if (!(buf[0] == 0 && !memcmp(buf, buf + 1,

include/uapi/rdma/ib_user_verbs.h

+1 −1
Original line number Diff line number Diff line
@@ -578,7 +578,7 @@ struct ib_uverbs_ex_create_qp { 
	__u32 comp_mask;

	__u32 create_flags;

	__u32 rwq_ind_tbl_handle;

	__u32  reserved1;

	__u32  source_qpn;

};



struct ib_uverbs_open_qp {