2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2012 The FreeBSD Foundation
7 * This software was developed by Edward Tomasz Napierala under sponsorship
8 * from the FreeBSD Foundation.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 #ifdef ICL_KERNEL_PROXY
38 #include <sys/socket.h>
41 #define ISCSI_PATH "/dev/iscsi"
42 #define ISCSI_MAX_DATA_SEGMENT_LENGTH (128 * 1024)
44 #define ISCSI_NAME_LEN 224 /* 223 bytes, by RFC 3720, + '\0' */
45 #define ISCSI_ADDR_LEN 47 /* INET6_ADDRSTRLEN + '\0' */
46 #define ISCSI_ALIAS_LEN 256 /* XXX: Where did it come from? */
47 #define ISCSI_SECRET_LEN 17 /* 16 + '\0' */
48 #define ISCSI_OFFLOAD_LEN 8
49 #define ISCSI_REASON_LEN 64
51 #define ISCSI_DIGEST_NONE 0
52 #define ISCSI_DIGEST_CRC32C 1
55 * Session configuration, set when adding the session.
57 struct iscsi_session_conf {
58 char isc_initiator[ISCSI_NAME_LEN];
59 char isc_initiator_addr[ISCSI_ADDR_LEN];
60 char isc_initiator_alias[ISCSI_ALIAS_LEN];
61 char isc_target[ISCSI_NAME_LEN];
62 char isc_target_addr[ISCSI_ADDR_LEN];
63 char isc_user[ISCSI_NAME_LEN];
64 char isc_secret[ISCSI_SECRET_LEN];
65 char isc_mutual_user[ISCSI_NAME_LEN];
66 char isc_mutual_secret[ISCSI_SECRET_LEN];
68 int isc_header_digest;
71 char isc_offload[ISCSI_OFFLOAD_LEN];
78 * Additional constraints imposed by chosen ICL offload module;
79 * iscsid(8) must obey those when negotiating operational parameters.
81 struct iscsi_session_limits {
83 int isl_max_recv_data_segment_length;
84 int isl_max_send_data_segment_length;
85 int isl_max_burst_length;
86 int isl_first_burst_length;
91 * Session state, negotiated by iscsid(8) and queried by iscsictl(8).
93 struct iscsi_session_state {
94 struct iscsi_session_conf iss_conf;
96 char iss_target_alias[ISCSI_ALIAS_LEN];
97 int iss_header_digest;
99 int iss_max_recv_data_segment_length;
100 int iss_max_burst_length;
101 int iss_first_burst_length;
102 int iss_immediate_data;
104 char iss_reason[ISCSI_REASON_LEN];
105 char iss_offload[ISCSI_OFFLOAD_LEN];
106 int iss_max_send_data_segment_length;
111 * The following ioctls are used by iscsid(8).
113 struct iscsi_daemon_request {
114 unsigned int idr_session_id;
115 struct iscsi_session_conf idr_conf;
118 uint16_t idr_spare_cid;
119 struct iscsi_session_limits idr_limits;
123 struct iscsi_daemon_handoff {
124 unsigned int idh_session_id;
126 char idh_target_alias[ISCSI_ALIAS_LEN];
127 uint8_t idh_spare_isid[6];
129 uint16_t idh_spare_cid;
131 int idh_header_digest;
134 int idh_immediate_data;
136 int idh_max_recv_data_segment_length;
137 int idh_max_send_data_segment_length;
138 int idh_max_burst_length;
139 int idh_first_burst_length;
142 struct iscsi_daemon_fail {
143 unsigned int idf_session_id;
144 char idf_reason[ISCSI_REASON_LEN];
148 #define ISCSIDWAIT _IOR('I', 0x01, struct iscsi_daemon_request)
149 #define ISCSIDHANDOFF _IOW('I', 0x02, struct iscsi_daemon_handoff)
150 #define ISCSIDFAIL _IOW('I', 0x03, struct iscsi_daemon_fail)
152 #ifdef ICL_KERNEL_PROXY
155 * When ICL_KERNEL_PROXY is not defined, the iscsid(8) is responsible
156 * for creating the socket, connecting, and performing Login Phase using
157 * the socket in the usual userspace way, and then passing the socket
158 * file descriptor to the kernel part using ISCSIDHANDOFF.
160 * When ICL_KERNEL_PROXY is defined, the iscsid(8) creates the session
161 * using ISCSICONNECT, performs Login Phase using ISCSISEND/ISCSIRECEIVE
162 * instead of read(2)/write(2), and then calls ISCSIDHANDOFF with
163 * idh_socket set to 0.
165 * The purpose of ICL_KERNEL_PROXY is to workaround the fact that,
166 * at this time, it's not possible to do iWARP (RDMA) in userspace.
169 struct iscsi_daemon_connect {
170 unsigned int idc_session_id;
175 struct sockaddr *idc_from_addr;
176 socklen_t idc_from_addrlen;
177 struct sockaddr *idc_to_addr;
178 socklen_t idc_to_addrlen;
182 struct iscsi_daemon_send {
183 unsigned int ids_session_id;
187 size_t ids_data_segment_len;
188 void *ids_data_segment;
192 struct iscsi_daemon_receive {
193 unsigned int idr_session_id;
197 size_t idr_data_segment_len;
198 void *idr_data_segment;
202 #define ISCSIDCONNECT _IOWR('I', 0x04, struct iscsi_daemon_connect)
203 #define ISCSIDSEND _IOWR('I', 0x05, struct iscsi_daemon_send)
204 #define ISCSIDRECEIVE _IOWR('I', 0x06, struct iscsi_daemon_receive)
206 #endif /* ICL_KERNEL_PROXY */
209 * The following ioctls are used by iscsictl(8).
211 struct iscsi_session_add {
212 struct iscsi_session_conf isa_conf;
216 struct iscsi_session_remove {
217 unsigned int isr_session_id;
218 struct iscsi_session_conf isr_conf;
222 struct iscsi_session_list {
223 unsigned int isl_nentries;
224 struct iscsi_session_state *isl_pstates;
228 struct iscsi_session_modify {
229 unsigned int ism_session_id;
230 struct iscsi_session_conf ism_conf;
234 #define ISCSISADD _IOW('I', 0x11, struct iscsi_session_add)
235 #define ISCSISREMOVE _IOW('I', 0x12, struct iscsi_session_remove)
236 #define ISCSISLIST _IOWR('I', 0x13, struct iscsi_session_list)
237 #define ISCSISMODIFY _IOWR('I', 0x14, struct iscsi_session_modify)
239 #endif /* !ISCSI_IOCTL_H */