From: Ron Livne Date: Tue, 15 Jul 2008 06:48:48 +0000 (-0700) Subject: IB/core: Add support for multicast loopback blocking X-Git-Tag: v2.6.27-rc1~1090^2~27 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=47ee1b9f2e7bf73950602efe0b74fa1a8481f222;p=linux-2.6 IB/core: Add support for multicast loopback blocking This patch also adds a creation flag for QPs, IB_QP_CREATE_MULTICAST_BLOCK_LOOPBACK, which when set means that multicast sends from the QP to a group that the QP is attached to will not be looped back to the QP's receive queue. This can be used to save receive resources when a consumer does not want a local copy of multicast traffic; for example IPoIB must waste CPU time throwing away such local copies of multicast traffic. This patch also adds a device capability flag that shows whether a device supports this feature or not. Signed-off-by: Ron Livne Signed-off-by: Roland Dreier --- diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h index 10ebaaae01..07b41e0556 100644 --- a/include/rdma/ib_verbs.h +++ b/include/rdma/ib_verbs.h @@ -104,6 +104,7 @@ enum ib_device_cap_flags { IB_DEVICE_UD_IP_CSUM = (1<<18), IB_DEVICE_UD_TSO = (1<<19), IB_DEVICE_MEM_MGT_EXTENSIONS = (1<<21), + IB_DEVICE_BLOCK_MULTICAST_LOOPBACK = (1<<22), }; enum ib_atomic_cap { @@ -555,7 +556,8 @@ enum ib_qp_type { }; enum ib_qp_create_flags { - IB_QP_CREATE_IPOIB_UD_LSO = 1 << 0, + IB_QP_CREATE_IPOIB_UD_LSO = 1 << 0, + IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK = 1 << 1, }; struct ib_qp_init_attr {