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![Sean Hefty](/assets/img/avatar_default.png)
Provide an option for the user to specify that listens should only accept connections where the incoming address family matches that of the locally bound address. This is used to support the equivalent of IPV6_V6ONLY socket option, which allows an app to only accept connection requests directed to IPv6 addresses. Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
370 lines
12 KiB
C
370 lines
12 KiB
C
/*
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* Copyright (c) 2005 Voltaire Inc. All rights reserved.
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* Copyright (c) 2005 Intel Corporation. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#if !defined(RDMA_CM_H)
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#define RDMA_CM_H
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#include <linux/socket.h>
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#include <linux/in6.h>
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#include <rdma/ib_addr.h>
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#include <rdma/ib_sa.h>
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/*
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* Upon receiving a device removal event, users must destroy the associated
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* RDMA identifier and release all resources allocated with the device.
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*/
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enum rdma_cm_event_type {
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RDMA_CM_EVENT_ADDR_RESOLVED,
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RDMA_CM_EVENT_ADDR_ERROR,
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RDMA_CM_EVENT_ROUTE_RESOLVED,
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RDMA_CM_EVENT_ROUTE_ERROR,
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RDMA_CM_EVENT_CONNECT_REQUEST,
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RDMA_CM_EVENT_CONNECT_RESPONSE,
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RDMA_CM_EVENT_CONNECT_ERROR,
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RDMA_CM_EVENT_UNREACHABLE,
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RDMA_CM_EVENT_REJECTED,
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RDMA_CM_EVENT_ESTABLISHED,
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RDMA_CM_EVENT_DISCONNECTED,
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RDMA_CM_EVENT_DEVICE_REMOVAL,
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RDMA_CM_EVENT_MULTICAST_JOIN,
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RDMA_CM_EVENT_MULTICAST_ERROR,
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RDMA_CM_EVENT_ADDR_CHANGE,
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RDMA_CM_EVENT_TIMEWAIT_EXIT
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};
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enum rdma_port_space {
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RDMA_PS_SDP = 0x0001,
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RDMA_PS_IPOIB = 0x0002,
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RDMA_PS_IB = 0x013F,
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RDMA_PS_TCP = 0x0106,
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RDMA_PS_UDP = 0x0111,
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};
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struct rdma_addr {
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struct sockaddr_storage src_addr;
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struct sockaddr_storage dst_addr;
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struct rdma_dev_addr dev_addr;
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};
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struct rdma_route {
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struct rdma_addr addr;
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struct ib_sa_path_rec *path_rec;
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int num_paths;
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};
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struct rdma_conn_param {
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const void *private_data;
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u8 private_data_len;
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u8 responder_resources;
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u8 initiator_depth;
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u8 flow_control;
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u8 retry_count; /* ignored when accepting */
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u8 rnr_retry_count;
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/* Fields below ignored if a QP is created on the rdma_cm_id. */
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u8 srq;
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u32 qp_num;
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};
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struct rdma_ud_param {
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const void *private_data;
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u8 private_data_len;
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struct ib_ah_attr ah_attr;
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u32 qp_num;
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u32 qkey;
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};
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struct rdma_cm_event {
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enum rdma_cm_event_type event;
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int status;
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union {
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struct rdma_conn_param conn;
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struct rdma_ud_param ud;
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} param;
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};
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enum rdma_cm_state {
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RDMA_CM_IDLE,
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RDMA_CM_ADDR_QUERY,
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RDMA_CM_ADDR_RESOLVED,
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RDMA_CM_ROUTE_QUERY,
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RDMA_CM_ROUTE_RESOLVED,
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RDMA_CM_CONNECT,
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RDMA_CM_DISCONNECT,
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RDMA_CM_ADDR_BOUND,
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RDMA_CM_LISTEN,
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RDMA_CM_DEVICE_REMOVAL,
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RDMA_CM_DESTROYING
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};
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struct rdma_cm_id;
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/**
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* rdma_cm_event_handler - Callback used to report user events.
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*
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* Notes: Users may not call rdma_destroy_id from this callback to destroy
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* the passed in id, or a corresponding listen id. Returning a
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* non-zero value from the callback will destroy the passed in id.
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*/
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typedef int (*rdma_cm_event_handler)(struct rdma_cm_id *id,
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struct rdma_cm_event *event);
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struct rdma_cm_id {
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struct ib_device *device;
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void *context;
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struct ib_qp *qp;
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rdma_cm_event_handler event_handler;
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struct rdma_route route;
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enum rdma_port_space ps;
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enum ib_qp_type qp_type;
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u8 port_num;
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};
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/**
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* rdma_create_id - Create an RDMA identifier.
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*
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* @event_handler: User callback invoked to report events associated with the
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* returned rdma_id.
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* @context: User specified context associated with the id.
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* @ps: RDMA port space.
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* @qp_type: type of queue pair associated with the id.
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*/
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struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler,
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void *context, enum rdma_port_space ps,
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enum ib_qp_type qp_type);
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/**
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* rdma_destroy_id - Destroys an RDMA identifier.
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*
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* @id: RDMA identifier.
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*
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* Note: calling this function has the effect of canceling in-flight
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* asynchronous operations associated with the id.
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*/
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void rdma_destroy_id(struct rdma_cm_id *id);
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/**
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* rdma_bind_addr - Bind an RDMA identifier to a source address and
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* associated RDMA device, if needed.
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*
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* @id: RDMA identifier.
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* @addr: Local address information. Wildcard values are permitted.
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*
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* This associates a source address with the RDMA identifier before calling
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* rdma_listen. If a specific local address is given, the RDMA identifier will
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* be bound to a local RDMA device.
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*/
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int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr);
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/**
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* rdma_resolve_addr - Resolve destination and optional source addresses
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* from IP addresses to an RDMA address. If successful, the specified
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* rdma_cm_id will be bound to a local device.
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*
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* @id: RDMA identifier.
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* @src_addr: Source address information. This parameter may be NULL.
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* @dst_addr: Destination address information.
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* @timeout_ms: Time to wait for resolution to complete.
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*/
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int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
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struct sockaddr *dst_addr, int timeout_ms);
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/**
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* rdma_resolve_route - Resolve the RDMA address bound to the RDMA identifier
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* into route information needed to establish a connection.
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*
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* This is called on the client side of a connection.
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* Users must have first called rdma_resolve_addr to resolve a dst_addr
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* into an RDMA address before calling this routine.
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*/
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int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms);
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/**
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* rdma_create_qp - Allocate a QP and associate it with the specified RDMA
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* identifier.
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*
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* QPs allocated to an rdma_cm_id will automatically be transitioned by the CMA
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* through their states.
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*/
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int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
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struct ib_qp_init_attr *qp_init_attr);
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/**
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* rdma_destroy_qp - Deallocate the QP associated with the specified RDMA
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* identifier.
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*
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* Users must destroy any QP associated with an RDMA identifier before
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* destroying the RDMA ID.
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*/
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void rdma_destroy_qp(struct rdma_cm_id *id);
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/**
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* rdma_init_qp_attr - Initializes the QP attributes for use in transitioning
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* to a specified QP state.
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* @id: Communication identifier associated with the QP attributes to
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* initialize.
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* @qp_attr: On input, specifies the desired QP state. On output, the
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* mandatory and desired optional attributes will be set in order to
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* modify the QP to the specified state.
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* @qp_attr_mask: The QP attribute mask that may be used to transition the
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* QP to the specified state.
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*
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* Users must set the @qp_attr->qp_state to the desired QP state. This call
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* will set all required attributes for the given transition, along with
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* known optional attributes. Users may override the attributes returned from
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* this call before calling ib_modify_qp.
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*
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* Users that wish to have their QP automatically transitioned through its
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* states can associate a QP with the rdma_cm_id by calling rdma_create_qp().
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*/
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int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
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int *qp_attr_mask);
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/**
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* rdma_connect - Initiate an active connection request.
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* @id: Connection identifier to connect.
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* @conn_param: Connection information used for connected QPs.
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*
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* Users must have resolved a route for the rdma_cm_id to connect with
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* by having called rdma_resolve_route before calling this routine.
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*
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* This call will either connect to a remote QP or obtain remote QP
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* information for unconnected rdma_cm_id's. The actual operation is
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* based on the rdma_cm_id's port space.
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*/
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int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param);
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/**
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* rdma_listen - This function is called by the passive side to
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* listen for incoming connection requests.
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*
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* Users must have bound the rdma_cm_id to a local address by calling
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* rdma_bind_addr before calling this routine.
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*/
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int rdma_listen(struct rdma_cm_id *id, int backlog);
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/**
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* rdma_accept - Called to accept a connection request or response.
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* @id: Connection identifier associated with the request.
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* @conn_param: Information needed to establish the connection. This must be
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* provided if accepting a connection request. If accepting a connection
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* response, this parameter must be NULL.
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*
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* Typically, this routine is only called by the listener to accept a connection
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* request. It must also be called on the active side of a connection if the
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* user is performing their own QP transitions.
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*
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* In the case of error, a reject message is sent to the remote side and the
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* state of the qp associated with the id is modified to error, such that any
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* previously posted receive buffers would be flushed.
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*/
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int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param);
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/**
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* rdma_notify - Notifies the RDMA CM of an asynchronous event that has
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* occurred on the connection.
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* @id: Connection identifier to transition to established.
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* @event: Asynchronous event.
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*
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* This routine should be invoked by users to notify the CM of relevant
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* communication events. Events that should be reported to the CM and
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* when to report them are:
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*
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* IB_EVENT_COMM_EST - Used when a message is received on a connected
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* QP before an RTU has been received.
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*/
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int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event);
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/**
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* rdma_reject - Called to reject a connection request or response.
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*/
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int rdma_reject(struct rdma_cm_id *id, const void *private_data,
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u8 private_data_len);
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/**
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* rdma_disconnect - This function disconnects the associated QP and
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* transitions it into the error state.
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*/
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int rdma_disconnect(struct rdma_cm_id *id);
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/**
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* rdma_join_multicast - Join the multicast group specified by the given
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* address.
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* @id: Communication identifier associated with the request.
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* @addr: Multicast address identifying the group to join.
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* @context: User-defined context associated with the join request, returned
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* to the user through the private_data pointer in multicast events.
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*/
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int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
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void *context);
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/**
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* rdma_leave_multicast - Leave the multicast group specified by the given
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* address.
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*/
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void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr);
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/**
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* rdma_set_service_type - Set the type of service associated with a
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* connection identifier.
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* @id: Communication identifier to associated with service type.
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* @tos: Type of service.
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*
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* The type of service is interpretted as a differentiated service
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* field (RFC 2474). The service type should be specified before
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* performing route resolution, as existing communication on the
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* connection identifier may be unaffected. The type of service
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* requested may not be supported by the network to all destinations.
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*/
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void rdma_set_service_type(struct rdma_cm_id *id, int tos);
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/**
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* rdma_set_reuseaddr - Allow the reuse of local addresses when binding
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* the rdma_cm_id.
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* @id: Communication identifier to configure.
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* @reuse: Value indicating if the bound address is reusable.
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*
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* Reuse must be set before an address is bound to the id.
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*/
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int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse);
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/**
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* rdma_set_afonly - Specify that listens are restricted to the
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* bound address family only.
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* @id: Communication identifer to configure.
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* @afonly: Value indicating if listens are restricted.
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*
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* Must be set before identifier is in the listening state.
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*/
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int rdma_set_afonly(struct rdma_cm_id *id, int afonly);
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#endif /* RDMA_CM_H */
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