[PATCH 13/26 v3] rdma/cm: Expose private data when using AF_IB
From: Hefty, Sean <hidden>
Date: 2012-09-24 20:05:49
Subsystem:
infiniband subsystem, the rest · Maintainers:
Jason Gunthorpe, Leon Romanovsky, Linus Torvalds
If the source or destination address is AF_IB, then do not reserve a portion of the private data in the IB CM REQ or SIDR REQ messages for the cma header. Instead, all private data should be exported to the user. When AF_IB is used, the rdma cm does not have sufficient information to fill in the cma header. Additionally, this will be necessary to support any IB connection through the rdma cm interface, Signed-off-by: Sean Hefty <redacted> --- drivers/infiniband/core/cma.c | 24 ++++++++++-------------- 1 files changed, 10 insertions(+), 14 deletions(-)
diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c
index 4e205db..1264e97 100644
--- a/drivers/infiniband/core/cma.c
+++ b/drivers/infiniband/core/cma.c@@ -907,14 +907,10 @@ static void cma_save_net_info(struct rdma_addr *addr, } } -static inline int cma_user_data_offset(enum rdma_port_space ps) +static inline int cma_user_data_offset(struct rdma_id_private *id_priv) { - switch (ps) { - case RDMA_PS_SDP: - return 0; - default: - return sizeof(struct cma_hdr); - } + return (cma_family(id_priv) == AF_IB || id_priv->id.ps == RDMA_PS_SDP) ? + 0 : sizeof(struct cma_hdr); } static void cma_cancel_route(struct rdma_id_private *id_priv)
@@ -1310,7 +1306,7 @@ static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event) return -ECONNABORTED; memset(&event, 0, sizeof event); - offset = cma_user_data_offset(listen_id->id.ps); + offset = cma_user_data_offset(listen_id); event.event = RDMA_CM_EVENT_CONNECT_REQUEST; if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) { conn_id = cma_new_udp_id(&listen_id->id, ib_event);
@@ -2637,7 +2633,7 @@ static int cma_format_hdr(void *hdr, struct rdma_id_private *id_priv) cma_hdr->port = src4->sin_port; break; } - } else { + } else if (cma_family(id_priv) == AF_INET6) { struct sockaddr_in6 *src6, *dst6; src6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
@@ -2735,10 +2731,10 @@ static int cma_resolve_ib_udp(struct rdma_id_private *id_priv, { struct ib_cm_sidr_req_param req; struct ib_cm_id *id; - int ret; + int offset, ret; - req.private_data_len = sizeof(struct cma_hdr) + - conn_param->private_data_len; + offset = cma_user_data_offset(id_priv); + req.private_data_len = offset + conn_param->private_data_len; if (req.private_data_len < conn_param->private_data_len) return -EINVAL;
@@ -2747,7 +2743,7 @@ static int cma_resolve_ib_udp(struct rdma_id_private *id_priv, return -ENOMEM; if (conn_param->private_data && conn_param->private_data_len) - memcpy((void *) req.private_data + sizeof(struct cma_hdr), + memcpy((void *) req.private_data + offset, conn_param->private_data, conn_param->private_data_len); ret = cma_format_hdr((void *) req.private_data, id_priv);
@@ -2787,7 +2783,7 @@ static int cma_connect_ib(struct rdma_id_private *id_priv, int offset, ret; memset(&req, 0, sizeof req); - offset = cma_user_data_offset(id_priv->id.ps); + offset = cma_user_data_offset(id_priv); req.private_data_len = offset + conn_param->private_data_len; if (req.private_data_len < conn_param->private_data_len) return -EINVAL; --
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