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Diffstat (limited to 'include/scsi/scsi_transport_iscsi.h')
| -rw-r--r-- | include/scsi/scsi_transport_iscsi.h | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/include/scsi/scsi_transport_iscsi.h b/include/scsi/scsi_transport_iscsi.h new file mode 100644 index 000000000000..1b26a6c0aa2a --- /dev/null +++ b/include/scsi/scsi_transport_iscsi.h @@ -0,0 +1,178 @@ +/* + * 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 |
