/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2012 The FreeBSD Foundation
*
* This software was developed by Edward Tomasz Napierala under sponsorship
* from the FreeBSD Foundation.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef ISCSI_IOCTL_H
#define ISCSI_IOCTL_H
#ifdef ICL_KERNEL_PROXY
#include <sys/socket.h>
#endif
#define ISCSI_PATH "/dev/iscsi"
#define ISCSI_MAX_DATA_SEGMENT_LENGTH (128 * 1024)
#define ISCSI_NAME_LEN 224 /* 223 bytes, by RFC 3720, + '\0' */
#define ISCSI_ADDR_LEN 47 /* INET6_ADDRSTRLEN + '\0' */
#define ISCSI_ALIAS_LEN 256 /* XXX: Where did it come from? */
#define ISCSI_SECRET_LEN 17 /* 16 + '\0' */
#define ISCSI_OFFLOAD_LEN 8
#define ISCSI_REASON_LEN 64
#define ISCSI_DIGEST_NONE 0
#define ISCSI_DIGEST_CRC32C 1
/*
* Session configuration, set when adding the session.
*/
struct iscsi_session_conf {
char isc_initiator[ISCSI_NAME_LEN];
char isc_initiator_addr[ISCSI_ADDR_LEN];
char isc_initiator_alias[ISCSI_ALIAS_LEN];
char isc_target[ISCSI_NAME_LEN];
char isc_target_addr[ISCSI_ADDR_LEN];
char isc_user[ISCSI_NAME_LEN];
char isc_secret[ISCSI_SECRET_LEN];
char isc_mutual_user[ISCSI_NAME_LEN];
char isc_mutual_secret[ISCSI_SECRET_LEN];
int isc_discovery;
int isc_header_digest;
int isc_data_digest;
int isc_iser;
char isc_offload[ISCSI_OFFLOAD_LEN];
int isc_enable;
int isc_dscp;
int isc_pcp;
int isc_spare[2];
};
/*
* Additional constraints imposed by chosen ICL offload module;
* iscsid(8) must obey those when negotiating operational parameters.
*/
struct iscsi_session_limits {
size_t isl_spare0;
int isl_max_recv_data_segment_length;
int isl_max_send_data_segment_length;
int isl_max_burst_length;
int isl_first_burst_length;
int isl_spare[4];
};
/*
* Session state, negotiated by iscsid(8) and queried by iscsictl(8).
*/
struct iscsi_session_state {
struct iscsi_session_conf iss_conf;
unsigned int iss_id;
char iss_target_alias[ISCSI_ALIAS_LEN];
int iss_header_digest;
int iss_data_digest;
int iss_max_recv_data_segment_length;
int iss_max_burst_length;
int iss_first_burst_length;
int iss_immediate_data;
int iss_connected;
char iss_reason[ISCSI_REASON_LEN];
char iss_offload[ISCSI_OFFLOAD_LEN];
int iss_max_send_data_segment_length;
int iss_spare[3];
};
/*
* The following ioctls are used by iscsid(8).
*/
struct iscsi_daemon_request {
unsigned int idr_session_id;
struct iscsi_session_conf idr_conf;
uint8_t idr_isid[6];
uint16_t idr_tsih;
uint16_t idr_spare_cid;
struct iscsi_session_limits idr_limits;
int idr_spare[4];
};
struct iscsi_daemon_handoff {
unsigned int idh_session_id;
int idh_socket;
char idh_target_alias[ISCSI_ALIAS_LEN];
int idh_protocol_level;
uint16_t idh_spare;
uint16_t idh_tsih;
uint16_t idh_spare_cid;
uint32_t idh_statsn;
int idh_header_digest;
int idh_data_digest;
size_t spare[3];
int idh_immediate_data;
int idh_initial_r2t;
int idh_max_recv_data_segment_length;
int idh_max_send_data_segment_length;
int idh_max_burst_length;
int idh_first_burst_length;
};
struct iscsi_daemon_fail {
unsigned int idf_session_id;
char idf_reason[ISCSI_REASON_LEN];
int idf_spare[4];
};
#define ISCSIDWAIT _IOR('I', 0x01, struct iscsi_daemon_request)
#define ISCSIDHANDOFF _IOW('I', 0x02, struct iscsi_daemon_handoff)
#define ISCSIDFAIL _IOW('I', 0x03, struct iscsi_daemon_fail)
#ifdef ICL_KERNEL_PROXY
/*
* When ICL_KERNEL_PROXY is not defined, the iscsid(8) is responsible
* for creating the socket, connecting, and performing Login Phase using
* the socket in the usual userspace way, and then passing the socket
* file descriptor to the kernel part using ISCSIDHANDOFF.
*
* When ICL_KERNEL_PROXY is defined, the iscsid(8) creates the session
* using ISCSICONNECT, performs Login Phase using ISCSISEND/ISCSIRECEIVE
* instead of read(2)/write(2), and then calls ISCSIDHANDOFF with
* idh_socket set to 0.
*
* The purpose of ICL_KERNEL_PROXY is to workaround the fact that,
* at this time, it's not possible to do iWARP (RDMA) in userspace.
*/
struct iscsi_daemon_connect {
unsigned int idc_session_id;
int idc_iser;
int idc_domain;
int idc_socktype;
int idc_protocol;
struct sockaddr *idc_from_addr;
socklen_t idc_from_addrlen;
struct sockaddr *idc_to_addr;
socklen_t idc_to_addrlen;
int idc_spare[4];
};
struct iscsi_daemon_send {
unsigned int ids_session_id;
void *ids_bhs;
size_t ids_spare;
void *ids_spare2;
size_t ids_data_segment_len;
void *ids_data_segment;
int ids_spare3[4];
};
struct iscsi_daemon_receive {
unsigned int idr_session_id;
void *idr_bhs;
size_t idr_spare;
void *idr_spare2;
size_t idr_data_segment_len;
void *idr_data_segment;
int idr_spare3[4];
};
#define ISCSIDCONNECT _IOWR('I', 0x04, struct iscsi_daemon_connect)
#define ISCSIDSEND _IOWR('I', 0x05, struct iscsi_daemon_send)
#define ISCSIDRECEIVE _IOWR('I', 0x06, struct iscsi_daemon_receive)
#endif /* ICL_KERNEL_PROXY */
/*
* The following ioctls are used by iscsictl(8).
*/
struct iscsi_session_add {
struct iscsi_session_conf isa_conf;
int isa_spare[4];
};
struct iscsi_session_remove {
unsigned int isr_session_id;
struct iscsi_session_conf isr_conf;
int isr_spare[4];
};
struct iscsi_session_list {
unsigned int isl_nentries;
struct iscsi_session_state *isl_pstates;
int isl_spare[4];
};
struct iscsi_session_modify {
unsigned int ism_session_id;
struct iscsi_session_conf ism_conf;
int ism_spare[4];
};
#define ISCSISADD _IOW('I', 0x11, struct iscsi_session_add)
#define ISCSISREMOVE _IOW('I', 0x12, struct iscsi_session_remove)
#define ISCSISLIST _IOWR('I', 0x13, struct iscsi_session_list)
#define ISCSISMODIFY _IOWR('I', 0x14, struct iscsi_session_modify)
#endif /* !ISCSI_IOCTL_H */