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
/*
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* Copyright (c) 2005 Network Appliance, Inc. All rights reserved.
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* Copyright (c) 2005 Open Grid Computing, Inc. 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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#ifndef IWCM_H
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#define IWCM_H
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enum iw_cm_state {
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IW_CM_STATE_IDLE, /* unbound, inactive */
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IW_CM_STATE_LISTEN, /* listen waiting for connect */
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IW_CM_STATE_CONN_RECV, /* inbound waiting for user accept */
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IW_CM_STATE_CONN_SENT, /* outbound waiting for peer accept */
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IW_CM_STATE_ESTABLISHED, /* established */
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IW_CM_STATE_CLOSING, /* disconnect */
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IW_CM_STATE_DESTROYING /* object being deleted */
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};
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struct iwcm_id_private {
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struct iw_cm_id id;
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enum iw_cm_state state;
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unsigned long flags;
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struct ib_qp *qp;
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struct completion destroy_comp;
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wait_queue_head_t connect_wait;
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struct list_head work_list;
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spinlock_t lock;
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atomic_t refcount;
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struct list_head work_free_list;
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};
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#define IWCM_F_DROP_EVENTS 1
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#define IWCM_F_CONNECT_WAIT 2
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#endif /* IWCM_H */
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