forked from luck/tmp_suning_uos_patched
59c68ac31e
Remove the complicated logic to free the iw_cm_id inside iw_cm event handlers vs when an application thread destroys the cm_id. Also remove the block in iw_destroy_cm_id() to block the application until all references are removed. This block can cause a deadlock when disconnecting or destroying cm_ids inside an rdma_cm event handler. Simply allowing the last deref of the iw_cm_id to free the memory is cleaner and avoids this potential deadlock. Also a flag is added, IW_CM_DROP_EVENTS, that is set when the cm_id is marked for destruction. If any events are pending on this iw_cm_id, then as they are processed they will be dropped vs posted upstream if IW_CM_DROP_EVENTS is set. Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
63 lines
2.3 KiB
C
63 lines
2.3 KiB
C
/*
|
|
* Copyright (c) 2005 Network Appliance, Inc. All rights reserved.
|
|
* Copyright (c) 2005 Open Grid Computing, Inc. All rights reserved.
|
|
*
|
|
* This software is available to you under a choice of one of two
|
|
* licenses. You may choose to be licensed under the terms of the GNU
|
|
* General Public License (GPL) Version 2, available from the file
|
|
* COPYING in the main directory of this source tree, or the
|
|
* OpenIB.org BSD license below:
|
|
*
|
|
* Redistribution and use in source and binary forms, with or
|
|
* without modification, are permitted provided that the following
|
|
* conditions are met:
|
|
*
|
|
* - Redistributions of source code must retain the above
|
|
* copyright notice, this list of conditions and the following
|
|
* disclaimer.
|
|
*
|
|
* - Redistributions in binary form must reproduce the above
|
|
* copyright notice, this list of conditions and the following
|
|
* disclaimer in the documentation and/or other materials
|
|
* provided with the distribution.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
|
|
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
|
|
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
|
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
* SOFTWARE.
|
|
*/
|
|
#ifndef IWCM_H
|
|
#define IWCM_H
|
|
|
|
enum iw_cm_state {
|
|
IW_CM_STATE_IDLE, /* unbound, inactive */
|
|
IW_CM_STATE_LISTEN, /* listen waiting for connect */
|
|
IW_CM_STATE_CONN_RECV, /* inbound waiting for user accept */
|
|
IW_CM_STATE_CONN_SENT, /* outbound waiting for peer accept */
|
|
IW_CM_STATE_ESTABLISHED, /* established */
|
|
IW_CM_STATE_CLOSING, /* disconnect */
|
|
IW_CM_STATE_DESTROYING /* object being deleted */
|
|
};
|
|
|
|
struct iwcm_id_private {
|
|
struct iw_cm_id id;
|
|
enum iw_cm_state state;
|
|
unsigned long flags;
|
|
struct ib_qp *qp;
|
|
struct completion destroy_comp;
|
|
wait_queue_head_t connect_wait;
|
|
struct list_head work_list;
|
|
spinlock_t lock;
|
|
atomic_t refcount;
|
|
struct list_head work_free_list;
|
|
};
|
|
|
|
#define IWCM_F_DROP_EVENTS 1
|
|
#define IWCM_F_CONNECT_WAIT 2
|
|
|
|
#endif /* IWCM_H */
|