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If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner] .TH DAT_EP_CREATE 3DAT "Jul 16, 2004" .SH NAME dat_ep_create \- create an instance of an Endpoint .SH SYNOPSIS .LP .nf cc [ \fIflag\fR\&.\|.\|. ] \fIfile\fR\&.\|.\|. \fB-ldat\fR [ \fIlibrary\fR\&.\|.\|. ] #include <\fBdat/udat.h\fR> DAT_RETURN dat_ep_create ( IN DAT_IA_HANDLE ia_handle, IN DAT_PZ_HANDLE pz_handle, IN DAT_EVD_HANDLE recv_evd_handle, IN DAT_EVD_HANDLE request_evd_handle, IN DAT_EVD_HANDLE connect_evd_handle, IN DAT_EP_ATTR *ep_attributes, OUT DAT_EP_HANDLE *ep_handle ) .fi .SH PARAMETERS .sp .ne 2 .na \fB\fIia_handle\fR\fR .ad .RS 22n Handle for an open instance of the IA to which the created Endpoint belongs. .RE .sp .ne 2 .na \fB\fIpz_handle\fR\fR .ad .RS 22n Handle for an instance of the Protection Zone. .RE .sp .ne 2 .na \fB\fIrecv_evd_handle\fR\fR .ad .RS 22n Handle for the Event Dispatcher where events for completions of incoming (receive) DTOs are reported. \fBDAT_HANDLE_NULL\fR specifies that the Consumer is not interested in events for completions of receives. .RE .sp .ne 2 .na \fB\fIrequest_evd_handle\fR\fR .ad .RS 22n Handle for the Event Dispatcher where events for completions of outgoing (Send, RDMA Write, RDMA Read, and RMR Bind) DTOs are reported. \fBDAT_HANDLE_NULL\fR specifies that the Consumer is not interested in events for completions of requests. .RE .sp .ne 2 .na \fB\fIconnect_evd_handle\fR\fR .ad .RS 22n Handle for the Event Dispatcher where Connection events are reported. \fBDAT_HANDLE_NULL\fR specifies that the Consumer is not interested in connection events for now. .RE .sp .ne 2 .na \fB\fIep_attributes\fR\fR .ad .RS 22n Pointer to a structure that contains Consumer-requested Endpoint attributes. Can be \fINULL\fR. .RE .sp .ne 2 .na \fB\fIep_handle\fR\fR .ad .RS 22n Handle for the created instance of an Endpoint. .RE .SH DESCRIPTION .sp .LP The \fBdat_ep_create()\fR function creates an instance of an Endpoint that is provided to the Consumer as \fIep_handle\fR. The value of \fIep_handle\fR is not defined if the \fBDAT_RETURN\fR is not \fBDAT_SUCCESS\fR. .sp .LP The Endpoint is created in the Unconnected state. .sp .LP Protection Zone \fIpz_handle\fR allows Consumers to control what local memory the Endpoint can access for DTOs and what memory remote RDMA operations can access over the connection of a created Endpoint. Only memory referred to by LMRs and RMRs that match the Endpoint Protection Zone can be accessed by the Endpoint. .sp .LP The \fIrecv_evd_handle\fR and \fIrequest_evd_handle\fR parameters are Event Dispatcher instances where the Consumer collects completion notifications of DTOs. Completions of Receive DTOs are reported in \fIrecv_evd_handle\fR Event Dispatcher, and completions of Send, RDMA Read, and RDMA Write DTOs are reported in \fIrequest_evd_handle\fR Event Dispatcher. All completion notifications of RMR bindings are reported to a Consumer in \fIrequest_evd_handle\fR Event Dispatcher. .sp .LP All Connection events for the connected Endpoint are reported to the Consumer through \fIconnect_evd_handle\fR Event Dispatcher. .sp .LP The \fIep_attributes\fR parameter specifies the initial attributes of the created Endpoint. If the Consumer specifies \fINULL\fR, the Provider fills it with its default Endpoint attributes. The Consumer might not be able to do any posts to the Endpoint or use the Endpoint in connection establishment until certain Endpoint attributes are set. Maximum Message Size and Maximum Recv DTOs are examples of such attributes. .SH RETURN VALUES .sp .ne 2 .na \fB\fBDAT_SUCCESS\fR\fR .ad .RS 30n The operation was successful. .RE .sp .ne 2 .na \fB\fBDAT_INSUFFICIENT_RESOURCES\fR\fR .ad .RS 30n The operation failed due to resource limitations. .RE .sp .ne 2 .na \fB\fBDAT_INVALID_HANDLE\fR\fR .ad .RS 30n Invalid DAT handle. .RE .sp .ne 2 .na \fB\fBDAT_INVALID_PARAMETER\fR\fR .ad .RS 30n Invalid parameter. One of the requested EP parameters or attributes was invalid or a combination of attributes or parameters is invalid. .RE .sp .ne 2 .na \fB\fBDAT_MODEL_NOT_SUPPORTED\fR\fR .ad .RS 30n The requested Provider Model was not supported. .RE .SH USAGE .sp .LP The Consumer creates an Endpoint prior to the establishment of a connection. The created Endpoint is in \fBDAT_EP_STATE_UNCONNECTED\fR. Consumers can do the following: .RS +4 .TP 1. Request a connection on the Endpoint through \fBdat_ep_connect\fR(3DAT) or \fBdat_ep_dup_connect\fR(3DAT) for the active side of the connection model. .RE .RS +4 .TP 2. Associate the Endpoint with the Pending Connection Request that does not have an associated local Endpoint for accepting the Pending Connection Request for the passive/server side of the connection model. .RE .RS +4 .TP 3. Create a Reserved Service Point with the Endpoint for the passive/server side of the connection model. Upon arrival of a Connection Request on the Service Point, the Consumer accepts the Pending Connection Request that has the Endpoint associated with it .RE .sp .LP The Consumer cannot specify a \fIrequest_evd_handle\fR (\fIrecv_evd_handle\fR) with Request Completion Flags (Recv Completion Flags) that do not match the other Endpoint Completion Flags for the DTO/RMR completion streams that use the same EVD. If \fIrequest_evd_handle\fR (\fIrecv_evd_handle\fR) is used for an EVD that is fed by any event stream other than DTO or RMR completion event streams, only \fBDAT_COMPLETION_THRESHOLD\fR is valid for Request/Recv Completion Flags for the Endpoint completion streams that use that EVD. If \fIrequest_evd_handle\fR (\fIrecv_evd_handle\fR) is used for request (recv) completions of an Endpoint whose associated Request (Recv) Completion Flag attribute is \fBDAT_COMPLETION_UNSIGNALLED_FLAG\fR, the Request Completion Flags and Recv Completion Flags for all Endpoint completion streams that use the EVD must specify the same. Analogously, if \fIrecv_evd_handle\fR is used for recv completions of an Endpoint whose associated Recv Completion Flags attribute is \fBDAT_COMPLETION_SOLICITED_WAIT\fR, the Recv Completion Flags for all Endpoint Recv completion streams that use the same EVD must specify the same Recv Completion Flags attribute value and the EVD cannot be used for any other event stream types. .sp .LP If EP is created with \fINULL\fR attributes, Provider can fill them with its own default values. The Consumer should not rely on the Provider-filled attribute defaults, especially for portable applications. The Consumer cannot do any operations on the created Endpoint except for \fBdat_ep_query\fR(3DAT), \fBdat_ep_get_status\fR(3DAT), \fBdat_ep_modify\fR(3DAT), and \fBdat_ep_free\fR(3DAT), depending on the values that the Provider picks. .sp .LP The Provider is encouraged to pick up reasonable defaults because unreasonable values might restrict Consumers to the \fBdat_ep_query()\fR, \fBdat_ep_get_status()\fR, \fBdat_ep_modify()\fR, and \fBdat_ep_free()\fR operations. The Consumer should check what values the Provider picked up for the attributes. It is especially important to make sure that the number of posted operations is not too large to avoid EVD overflow. Depending on the values picked up by the Provider, the Consumer might not be able to do any RDMA operations; it might only be able to send or receive messages of very small sizes, or it might not be able to have more than one segment in a buffer. Before doing any operations, except the ones listed above, the Consumer can configure the Endpoint using \fBdat_ep_modify()\fR to the attributes they want. .sp .LP One reason the Consumer might still want to create an Endpoint with Null attributes is for the Passive side of the connection establishment, where the Consumer sets up Endpoint attributes based on the connection request of the remote side. .sp .LP Consumers might want to create Endpoints with \fINULL\fR attributes if Endpoint properties are negotiated as part the Consumer connection establishment protocol. .sp .LP Consumers that create Endpoints with Provider default attributes should always verify that the Provider default attributes meet their application's requirements with regard to the number of request/receive DTOs that can be posted, maximum message sizes, maximum request/receive IOV sizes, and maximum RDMA sizes. .SH ATTRIBUTES .sp .LP See \fBattributes\fR(7) for descriptions of the following attributes: .sp .sp .TS box; c | c l | l . ATTRIBUTE TYPE ATTRIBUTE VALUE _ Interface Stability Standard: uDAPL, 1.1, 1.2 _ MT-Level Safe .TE .SH SEE ALSO .sp .LP .BR dat_ep_connect (3DAT), .BR dat_ep_dup_connect (3DAT), .BR dat_ep_free (3DAT), .BR dat_ep_get_status (3DAT), .BR dat_ep_modify (3DAT), .BR dat_ep_query (3DAT), .BR libdat (3LIB), .BR attributes (7)