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RDMA/bnxt_re: Add check for path mtu in modify_qp

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[ Upstream commit 798653a0ee30d3cd495099282751c0f248614ae7 ]

When RDMA app configures path MTU, add a check in modify_qp verb
to make sure that it doesn't go beyond interface MTU. If this
check fails, driver will fail the modify_qp verb.

Fixes: 1ac5a40479 ("RDMA/bnxt_re: Add bnxt_re RoCE driver")
Reviewed-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Signed-off-by: Saravanan Vajravel <saravanan.vajravel@broadcom.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Link: https://patch.msgid.link/20241211083931.968831-3-kalesh-anakkur.purayil@broadcom.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Saravanan Vajravel 2024-12-11 14:09:28 +05:30 • committed by Greg Kroah-Hartman
parent 4e726e6b5f
commit 1dcf5cb17d
1 changed files with 14 additions and 12 deletions
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24
drivers/infiniband/hw/bnxt_re/ib_verbs.c
View file

@ -1852,18 +1852,20 @@ int bnxt_re_modify_qp(struct ib_qp *ib_qp, struct ib_qp_attr *qp_attr,
}
}
if (qp_attr->qp_state == IB_QPS_RTR) {
enum ib_mtu qpmtu;
qpmtu = iboe_get_mtu(rdev->netdev->mtu);
if (qp_attr_mask & IB_QP_PATH_MTU) {
qp->qplib_qp.modify_flags |=
CMDQ_MODIFY_QP_MODIFY_MASK_PATH_MTU;
qp->qplib_qp.path_mtu = __from_ib_mtu(qp_attr->path_mtu);
qp->qplib_qp.mtu = ib_mtu_enum_to_int(qp_attr->path_mtu);
} else if (qp_attr->qp_state == IB_QPS_RTR) {
qp->qplib_qp.modify_flags |=
CMDQ_MODIFY_QP_MODIFY_MASK_PATH_MTU;
qp->qplib_qp.path_mtu =
__from_ib_mtu(iboe_get_mtu(rdev->netdev->mtu));
qp->qplib_qp.mtu =
ib_mtu_enum_to_int(iboe_get_mtu(rdev->netdev->mtu));
if (ib_mtu_enum_to_int(qp_attr->path_mtu) >
ib_mtu_enum_to_int(qpmtu))
return -EINVAL;
qpmtu = qp_attr->path_mtu;
}
qp->qplib_qp.modify_flags |= CMDQ_MODIFY_QP_MODIFY_MASK_PATH_MTU;
qp->qplib_qp.path_mtu = __from_ib_mtu(qpmtu);
qp->qplib_qp.mtu = ib_mtu_enum_to_int(qpmtu);
}
if (qp_attr_mask & IB_QP_TIMEOUT) {