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