f167fac386
This ensures against races, when an existing session to a target node stalls, causing the initiator to create a new session. These new session's connection may get migrated to a different core than the core of the stalled session. In practice, this does not happen, but is a common occurrence when debugging the iSCSI target using gdb. Signed-off-by: Jim Harris <james.r.harris@intel.com> Change-Id: I1864c2ca0c330dc4faeeb1312adac7a02c8281dc
117 lines
4.0 KiB
C
117 lines
4.0 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright (C) 2008-2012 Daisuke Aoyama <aoyama@peach.ne.jp>.
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* Copyright (c) Intel Corporation.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef SPDK_ISCSI_TGT_NODE_H_
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#define SPDK_ISCSI_TGT_NODE_H_
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#include <pthread.h>
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#include <time.h>
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#include "spdk/scsi.h"
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struct spdk_iscsi_conn;
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#define SPDK_ISCSI_MAX_QUEUE_DEPTH 64
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#define MAX_TARGET_MAP 256
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#define SPDK_TN_TAG_MAX 0x0000ffff
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struct spdk_iscsi_tgt_node_map {
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struct spdk_iscsi_portal_grp *pg;
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struct spdk_iscsi_init_grp *ig;
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};
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struct spdk_iscsi_tgt_node {
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int num;
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char *name;
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char *alias;
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pthread_mutex_t mutex;
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int auth_chap_disabled;
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int auth_chap_required;
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int auth_chap_mutual;
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int auth_group;
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int header_digest;
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int data_digest;
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int queue_depth;
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struct spdk_scsi_dev *dev;
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/**
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* Counts number of active iSCSI connections associated with this
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* target node.
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*/
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uint32_t num_active_conns;
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int lcore;
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int maxmap;
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struct spdk_iscsi_tgt_node_map map[MAX_TARGET_MAP];
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};
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int spdk_iscsi_init_tgt_nodes(void);
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int spdk_iscsi_shutdown_tgt_nodes(void);
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int spdk_iscsi_shutdown_tgt_node_by_name(const char *target_name);
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int spdk_iscsi_send_tgts(struct spdk_iscsi_conn *conn, const char *iiqn,
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const char *iaddr, const char *tiqn, uint8_t *data, int alloc_len,
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int data_len);
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struct spdk_iscsi_init_grp *
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spdk_iscsi_find_init_grp(int tag);
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/* This typedef exists to work around an astyle 2.05 bug.
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* Remove it when astyle is fixed.
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*/
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typedef struct spdk_iscsi_tgt_node _spdk_iscsi_tgt_node;
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_spdk_iscsi_tgt_node *
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spdk_iscsi_tgt_node_construct(int target_index,
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const char *name, const char *alias,
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int *pg_tag_list, int *ig_tag_list, uint16_t num_maps,
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char *lun_name_list[], int *lun_id_list, int num_luns,
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int queue_depth,
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int no_auth_chap, int auth_chap, int auth_chap_mutual, int auth_group,
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int header_digest, int data_digest);
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int spdk_iscsi_tgt_node_access(struct spdk_iscsi_conn *conn,
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struct spdk_iscsi_tgt_node *target, const char *iqn,
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const char *addr);
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struct spdk_iscsi_tgt_node *spdk_iscsi_find_tgt_node(const char *target_name);
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int spdk_iscsi_tgt_node_reset(struct spdk_iscsi_tgt_node *target,
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uint64_t lun);
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int spdk_iscsi_tgt_node_cleanup_luns(struct spdk_iscsi_conn *conn,
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struct spdk_iscsi_tgt_node *target);
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void spdk_iscsi_tgt_node_delete_map(struct spdk_iscsi_portal_grp *portal_group,
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struct spdk_iscsi_init_grp *initiator_group);
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#endif /* SPDK_ISCSI_TGT_NODE_H_ */
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