mirror of
https://github.com/SCST-project/scst.git
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Chesnokov Gleb
41943ed156
The SCST has dropped support for kernels older than 3.10.0 (RHEL 7 / Centos 7) since SCST v3.6.
134 lines
3.7 KiB
C
134 lines
3.7 KiB
C
/*
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* This file is part of iser target kernel module.
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*
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* Copyright (c) 2013 - 2014 Mellanox Technologies. All rights reserved.
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* Copyright (c) 2013 - 2014 Yan Burman (yanb@mellanox.com)
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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 __ISERT_H__
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#define __ISERT_H__
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#include <linux/list.h>
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#include <linux/device.h>
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#include <linux/cdev.h>
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#include <linux/types.h> /* size_t, dev_t */
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#include <linux/mutex.h>
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#include <linux/wait.h>
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#include <linux/init.h>
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#include <linux/atomic.h>
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#ifdef INSIDE_KERNEL_TREE
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#include <scst/isert_scst.h>
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#include <scst/iscsi_scst.h>
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#else
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#include <linux/version.h>
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#include "isert_scst.h"
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#include "iscsi_scst.h"
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#endif
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#include "../iscsi.h"
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#include "iser_hdr.h"
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struct iscsi_conn;
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struct isert_portal;
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#define ISERT_NR_DEVS 128
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struct isert_listener_dev {
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struct device *dev;
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struct cdev cdev;
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dev_t devno;
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wait_queue_head_t waitqueue;
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struct mutex conn_lock;
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struct list_head new_conn_list;
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struct list_head curr_conn_list;
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struct isert_addr_info info;
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atomic_t available;
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struct isert_portal *portal_h[ISERT_MAX_PORTALS];
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int free_portal_idx;
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};
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enum isert_conn_dev_state {
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CS_INIT,
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CS_REQ_BHS,
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CS_REQ_DATA,
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CS_REQ_FINISHED,
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CS_RSP_BHS,
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CS_RSP_DATA,
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CS_RSP_FINISHED,
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CS_DISCONNECTED,
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};
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#define ISERT_CONN_PASSED 0
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struct isert_conn_dev {
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struct device *dev;
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struct cdev cdev;
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dev_t devno;
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wait_queue_head_t waitqueue;
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struct list_head conn_list_entry;
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struct iscsi_conn *conn;
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unsigned int idx;
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int occupied;
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spinlock_t pdu_lock;
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struct iscsi_cmnd *login_req;
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struct iscsi_cmnd *login_rsp;
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atomic_t available;
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size_t read_len;
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char *read_buf;
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size_t write_len;
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char *write_buf;
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void *sg_virt;
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struct page *pages[DIV_ROUND_UP(ISER_MAX_LOGIN_RDSL, PAGE_SIZE)];
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enum isert_conn_dev_state state;
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int is_discovery;
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struct timer_list tmo_timer;
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int timer_active;
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struct kref kref;
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unsigned long flags;
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};
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#define ISER_CONN_DEV_PREFIX "isert/conn"
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/* isert_login.c */
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int __init isert_init_login_devs(unsigned int ndevs);
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void isert_cleanup_login_devs(void);
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int isert_conn_alloc(struct iscsi_session *session,
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struct iscsi_kern_conn_info *info,
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struct iscsi_conn **new_conn,
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struct iscsit_transport *t);
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void isert_handle_close_connection(struct iscsi_conn *conn);
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void isert_close_all_portals(void);
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void isert_del_timer(struct isert_conn_dev *dev);
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#endif /* __ISERT_H__ */
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