179 lines
6.4 KiB
C
179 lines
6.4 KiB
C
/*
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* iSCSI transport class definitions
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*
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* Copyright (C) IBM Corporation, 2004
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* Copyright (C) Mike Christie, 2004
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef SCSI_TRANSPORT_ISCSI_H
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#define SCSI_TRANSPORT_ISCSI_H
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#include <linux/config.h>
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#include <linux/in6.h>
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#include <linux/in.h>
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struct scsi_transport_template;
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struct iscsi_class_session {
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uint8_t isid[6];
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uint16_t tsih;
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int header_digest; /* 1 CRC32, 0 None */
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int data_digest; /* 1 CRC32, 0 None */
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uint16_t tpgt;
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union {
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struct in6_addr sin6_addr;
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struct in_addr sin_addr;
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} u;
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sa_family_t addr_type; /* must be AF_INET or AF_INET6 */
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uint16_t port; /* must be in network byte order */
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int initial_r2t; /* 1 Yes, 0 No */
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int immediate_data; /* 1 Yes, 0 No */
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uint32_t max_recv_data_segment_len;
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uint32_t max_burst_len;
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uint32_t first_burst_len;
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uint16_t def_time2wait;
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uint16_t def_time2retain;
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uint16_t max_outstanding_r2t;
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int data_pdu_in_order; /* 1 Yes, 0 No */
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int data_sequence_in_order; /* 1 Yes, 0 No */
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int erl;
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};
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/*
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* accessor macros
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*/
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#define iscsi_isid(x) \
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(((struct iscsi_class_session *)&(x)->starget_data)->isid)
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#define iscsi_tsih(x) \
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(((struct iscsi_class_session *)&(x)->starget_data)->tsih)
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#define iscsi_header_digest(x) \
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(((struct iscsi_class_session *)&(x)->starget_data)->header_digest)
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#define iscsi_data_digest(x) \
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(((struct iscsi_class_session *)&(x)->starget_data)->data_digest)
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#define iscsi_port(x) \
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(((struct iscsi_class_session *)&(x)->starget_data)->port)
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#define iscsi_addr_type(x) \
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(((struct iscsi_class_session *)&(x)->starget_data)->addr_type)
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#define iscsi_sin_addr(x) \
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(((struct iscsi_class_session *)&(x)->starget_data)->u.sin_addr)
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#define iscsi_sin6_addr(x) \
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(((struct iscsi_class_session *)&(x)->starget_data)->u.sin6_addr)
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#define iscsi_tpgt(x) \
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(((struct iscsi_class_session *)&(x)->starget_data)->tpgt)
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#define iscsi_initial_r2t(x) \
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(((struct iscsi_class_session *)&(x)->starget_data)->initial_r2t)
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#define iscsi_immediate_data(x) \
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(((struct iscsi_class_session *)&(x)->starget_data)->immediate_data)
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#define iscsi_max_recv_data_segment_len(x) \
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(((struct iscsi_class_session *)&(x)->starget_data)->max_recv_data_segment_len)
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#define iscsi_max_burst_len(x) \
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(((struct iscsi_class_session *)&(x)->starget_data)->max_burst_len)
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#define iscsi_first_burst_len(x) \
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(((struct iscsi_class_session *)&(x)->starget_data)->first_burst_len)
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#define iscsi_def_time2wait(x) \
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(((struct iscsi_class_session *)&(x)->starget_data)->def_time2wait)
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#define iscsi_def_time2retain(x) \
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(((struct iscsi_class_session *)&(x)->starget_data)->def_time2retain)
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#define iscsi_max_outstanding_r2t(x) \
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(((struct iscsi_class_session *)&(x)->starget_data)->max_outstanding_r2t)
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#define iscsi_data_pdu_in_order(x) \
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(((struct iscsi_class_session *)&(x)->starget_data)->data_pdu_in_order)
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#define iscsi_data_sequence_in_order(x) \
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(((struct iscsi_class_session *)&(x)->starget_data)->data_sequence_in_order)
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#define iscsi_erl(x) \
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(((struct iscsi_class_session *)&(x)->starget_data)->erl)
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/*
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* The functions by which the transport class and the driver communicate
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*/
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struct iscsi_function_template {
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/*
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* target attrs
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*/
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void (*get_isid)(struct scsi_target *);
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void (*get_tsih)(struct scsi_target *);
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void (*get_header_digest)(struct scsi_target *);
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void (*get_data_digest)(struct scsi_target *);
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void (*get_port)(struct scsi_target *);
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void (*get_tpgt)(struct scsi_target *);
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/*
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* In get_ip_address the lld must set the address and
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* the address type
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*/
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void (*get_ip_address)(struct scsi_target *);
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/*
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* The lld should snprintf the name or alias to the buffer
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*/
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ssize_t (*get_target_name)(struct scsi_target *, char *, ssize_t);
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ssize_t (*get_target_alias)(struct scsi_target *, char *, ssize_t);
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void (*get_initial_r2t)(struct scsi_target *);
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void (*get_immediate_data)(struct scsi_target *);
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void (*get_max_recv_data_segment_len)(struct scsi_target *);
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void (*get_max_burst_len)(struct scsi_target *);
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void (*get_first_burst_len)(struct scsi_target *);
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void (*get_def_time2wait)(struct scsi_target *);
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void (*get_def_time2retain)(struct scsi_target *);
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void (*get_max_outstanding_r2t)(struct scsi_target *);
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void (*get_data_pdu_in_order)(struct scsi_target *);
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void (*get_data_sequence_in_order)(struct scsi_target *);
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void (*get_erl)(struct scsi_target *);
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/*
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* host atts
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*/
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/*
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* The lld should snprintf the name or alias to the buffer
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*/
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ssize_t (*get_initiator_alias)(struct Scsi_Host *, char *, ssize_t);
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ssize_t (*get_initiator_name)(struct Scsi_Host *, char *, ssize_t);
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/*
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* The driver sets these to tell the transport class it
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* wants the attributes displayed in sysfs. If the show_ flag
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* is not set, the attribute will be private to the transport
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* class. We could probably just test if a get_ fn was set
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* since we only use the values for sysfs but this is how
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* fc does it too.
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*/
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unsigned long show_isid:1;
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unsigned long show_tsih:1;
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unsigned long show_header_digest:1;
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unsigned long show_data_digest:1;
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unsigned long show_port:1;
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unsigned long show_tpgt:1;
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unsigned long show_ip_address:1;
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unsigned long show_target_name:1;
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unsigned long show_target_alias:1;
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unsigned long show_initial_r2t:1;
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unsigned long show_immediate_data:1;
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unsigned long show_max_recv_data_segment_len:1;
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unsigned long show_max_burst_len:1;
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unsigned long show_first_burst_len:1;
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unsigned long show_def_time2wait:1;
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unsigned long show_def_time2retain:1;
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unsigned long show_max_outstanding_r2t:1;
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unsigned long show_data_pdu_in_order:1;
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unsigned long show_data_sequence_in_order:1;
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unsigned long show_erl:1;
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unsigned long show_initiator_name:1;
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unsigned long show_initiator_alias:1;
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};
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struct scsi_transport_template *iscsi_attach_transport(struct iscsi_function_template *);
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void iscsi_release_transport(struct scsi_transport_template *);
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#endif
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