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2024-10-09 244b2c5ca8b14627e4a17755e5922221e121c771 
 kernel/include/rdma/rdma_cm.h
....@@ -1,37 +1,10 @@
1
+/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
12 /*
23  * Copyright (c) 2005 Voltaire Inc.  All rights reserved.
34  * Copyright (c) 2005 Intel Corporation.  All rights reserved.
4
- *
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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.
325  */
336 
34
-#if !defined(RDMA_CM_H)
7
+#ifndef RDMA_CM_H
358 #define RDMA_CM_H
369 
3710 #include <linux/socket.h>
....@@ -111,6 +84,7 @@
11184 		struct rdma_conn_param	conn;
11285 		struct rdma_ud_param	ud;
11386 	} param;
87
+	struct rdma_ucm_ece ece;
11488 };
11589 
11690 struct rdma_cm_id;
....@@ -136,11 +110,14 @@
136110 	u8			 port_num;
137111 };
138112 
139
-struct rdma_cm_id *__rdma_create_id(struct net *net,
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-				    rdma_cm_event_handler event_handler,
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-				    void *context, enum rdma_ucm_port_space ps,
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-				    enum ib_qp_type qp_type,
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-				    const char *caller);
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+struct rdma_cm_id *
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+__rdma_create_kernel_id(struct net *net, rdma_cm_event_handler event_handler,
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+			void *context, enum rdma_ucm_port_space ps,
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+			enum ib_qp_type qp_type, const char *caller);
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+struct rdma_cm_id *rdma_create_user_id(rdma_cm_event_handler event_handler,
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+				       void *context,
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+				       enum rdma_ucm_port_space ps,
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+				       enum ib_qp_type qp_type);
144121 
145122 /**
146123  * rdma_create_id - Create an RDMA identifier.
....@@ -152,11 +129,15 @@
152129  * @ps: RDMA port space.
153130  * @qp_type: type of queue pair associated with the id.
154131  *
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- * The id holds a reference on the network namespace until it is destroyed.
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+ * Returns a new rdma_cm_id. The id holds a reference on the network
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+ * namespace until it is destroyed.
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+ *
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+ * The event handler callback serializes on the id's mutex and is
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+ * allowed to sleep.
156137  */
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-#define rdma_create_id(net, event_handler, context, ps, qp_type) \
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-	__rdma_create_id((net), (event_handler), (context), (ps), (qp_type), \
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-			 KBUILD_MODNAME)
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+#define rdma_create_id(net, event_handler, context, ps, qp_type)               \
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+	__rdma_create_kernel_id(net, event_handler, context, ps, qp_type,      \
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+				KBUILD_MODNAME)
160141 
161142 /**
162143   * rdma_destroy_id - Destroys an RDMA identifier.
....@@ -192,7 +173,8 @@
192173  * @timeout_ms: Time to wait for resolution to complete.
193174  */
194175 int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
195
-		      const struct sockaddr *dst_addr, int timeout_ms);
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+		      const struct sockaddr *dst_addr,
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+		      unsigned long timeout_ms);
196178 
197179 /**
198180  * rdma_resolve_route - Resolve the RDMA address bound to the RDMA identifier
....@@ -202,7 +184,7 @@
202184  * Users must have first called rdma_resolve_addr to resolve a dst_addr
203185  * into an RDMA address before calling this routine.
204186  */
205
-int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms);
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+int rdma_resolve_route(struct rdma_cm_id *id, unsigned long timeout_ms);
206188 
207189 /**
208190  * rdma_create_qp - Allocate a QP and associate it with the specified RDMA
....@@ -245,19 +227,12 @@
245227 int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
246228 		       int *qp_attr_mask);
247229 
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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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- */
260230 int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param);
231
+int rdma_connect_locked(struct rdma_cm_id *id,
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+			struct rdma_conn_param *conn_param);
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+
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+int rdma_connect_ece(struct rdma_cm_id *id, struct rdma_conn_param *conn_param,
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+		     struct rdma_ucm_ece *ece);
261236 
262237 /**
263238  * rdma_listen - This function is called by the passive side to
....@@ -268,26 +243,12 @@
268243  */
269244 int rdma_listen(struct rdma_cm_id *id, int backlog);
270245 
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-int __rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param,
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-		  const char *caller);
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+int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param);
273247 
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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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-#define rdma_accept(id, conn_param) \
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-	__rdma_accept((id), (conn_param),  KBUILD_MODNAME)
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+void rdma_lock_handler(struct rdma_cm_id *id);
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+void rdma_unlock_handler(struct rdma_cm_id *id);
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+int rdma_accept_ece(struct rdma_cm_id *id, struct rdma_conn_param *conn_param,
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+		    struct rdma_ucm_ece *ece);
291252 
292253 /**
293254  * rdma_notify - Notifies the RDMA CM of an asynchronous event that has
....@@ -308,7 +269,7 @@
308269  * rdma_reject - Called to reject a connection request or response.
309270  */
310271 int rdma_reject(struct rdma_cm_id *id, const void *private_data,
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-		u8 private_data_len);
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+		u8 private_data_len, u8 reason);
312273 
313274 /**
314275  * rdma_disconnect - This function disconnects the associated QP and
....@@ -369,6 +330,7 @@
369330  */
370331 int rdma_set_afonly(struct rdma_cm_id *id, int afonly);
371332 
333
+int rdma_set_ack_timeout(struct rdma_cm_id *id, u8 timeout);
372334  /**
373335  * rdma_get_service_id - Return the IB service ID for a specified address.
374336  * @id: Communication identifier associated with the address.
....@@ -383,14 +345,6 @@
383345  */
384346 const char *__attribute_const__ rdma_reject_msg(struct rdma_cm_id *id,
385347 						int reason);
386
-/**
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- * rdma_is_consumer_reject - return true if the consumer rejected the connect
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- *                           request.
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- * @id: Communication identifier that received the REJECT event.
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- * @reason: Value returned in the REJECT event status field.
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- */
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-bool rdma_is_consumer_reject(struct rdma_cm_id *id, int reason);
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-
394348 /**
395349  * rdma_consumer_reject_data - return the consumer reject private data and
396350  *			       length, if any.