2 * Copyright (c) 2012 The FreeBSD Foundation
5 * This software was developed by Edward Tomasz Napierala under sponsorship
6 * from the FreeBSD Foundation.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 #ifdef ICL_KERNEL_PROXY
36 #include <sys/socket.h>
39 #define ISCSI_PATH "/dev/iscsi"
40 #define ISCSI_MAX_DATA_SEGMENT_LENGTH (128 * 1024)
42 #define ISCSI_NAME_LEN 224 /* 223 bytes, by RFC 3720, + '\0' */
43 #define ISCSI_ADDR_LEN 47 /* INET6_ADDRSTRLEN + '\0' */
44 #define ISCSI_ALIAS_LEN 256 /* XXX: Where did it come from? */
45 #define ISCSI_SECRET_LEN 17 /* 16 + '\0' */
46 #define ISCSI_OFFLOAD_LEN 8
47 #define ISCSI_REASON_LEN 64
49 #define ISCSI_DIGEST_NONE 0
50 #define ISCSI_DIGEST_CRC32C 1
53 * Session configuration, set when adding the session.
55 struct iscsi_session_conf {
56 char isc_initiator[ISCSI_NAME_LEN];
57 char isc_initiator_addr[ISCSI_ADDR_LEN];
58 char isc_initiator_alias[ISCSI_ALIAS_LEN];
59 char isc_target[ISCSI_NAME_LEN];
60 char isc_target_addr[ISCSI_ADDR_LEN];
61 char isc_user[ISCSI_NAME_LEN];
62 char isc_secret[ISCSI_SECRET_LEN];
63 char isc_mutual_user[ISCSI_NAME_LEN];
64 char isc_mutual_secret[ISCSI_SECRET_LEN];
66 int isc_header_digest;
69 char isc_offload[ISCSI_OFFLOAD_LEN];
75 * Additional constraints imposed by chosen ICL offload module;
76 * iscsid(8) must obey those when negotiating operational parameters.
78 struct iscsi_session_limits {
79 size_t isl_max_data_segment_length;
84 * Session state, negotiated by iscsid(8) and queried by iscsictl(8).
86 struct iscsi_session_state {
87 struct iscsi_session_conf iss_conf;
89 char iss_target_alias[ISCSI_ALIAS_LEN];
90 int iss_header_digest;
92 int iss_max_data_segment_length;
93 int iss_max_burst_length;
94 int iss_first_burst_length;
95 int iss_immediate_data;
97 char iss_reason[ISCSI_REASON_LEN];
98 char iss_offload[ISCSI_OFFLOAD_LEN];
103 * The following ioctls are used by iscsid(8).
105 struct iscsi_daemon_request {
106 unsigned int idr_session_id;
107 struct iscsi_session_conf idr_conf;
110 uint16_t idr_spare_cid;
111 struct iscsi_session_limits idr_limits;
115 struct iscsi_daemon_handoff {
116 unsigned int idh_session_id;
118 char idh_target_alias[ISCSI_ALIAS_LEN];
119 uint8_t idh_spare_isid[6];
121 uint16_t idh_spare_cid;
123 int idh_header_digest;
125 size_t idh_max_data_segment_length;
126 size_t idh_max_burst_length;
127 size_t idh_first_burst_length;
128 int idh_immediate_data;
133 struct iscsi_daemon_fail {
134 unsigned int idf_session_id;
135 char idf_reason[ISCSI_REASON_LEN];
139 #define ISCSIDWAIT _IOR('I', 0x01, struct iscsi_daemon_request)
140 #define ISCSIDHANDOFF _IOW('I', 0x02, struct iscsi_daemon_handoff)
141 #define ISCSIDFAIL _IOW('I', 0x03, struct iscsi_daemon_fail)
143 #ifdef ICL_KERNEL_PROXY
146 * When ICL_KERNEL_PROXY is not defined, the iscsid(8) is responsible
147 * for creating the socket, connecting, and performing Login Phase using
148 * the socket in the usual userspace way, and then passing the socket
149 * file descriptor to the kernel part using ISCSIDHANDOFF.
151 * When ICL_KERNEL_PROXY is defined, the iscsid(8) creates the session
152 * using ISCSICONNECT, performs Login Phase using ISCSISEND/ISCSIRECEIVE
153 * instead of read(2)/write(2), and then calls ISCSIDHANDOFF with
154 * idh_socket set to 0.
156 * The purpose of ICL_KERNEL_PROXY is to workaround the fact that,
157 * at this time, it's not possible to do iWARP (RDMA) in userspace.
160 struct iscsi_daemon_connect {
161 unsigned int idc_session_id;
166 struct sockaddr *idc_from_addr;
167 socklen_t idc_from_addrlen;
168 struct sockaddr *idc_to_addr;
169 socklen_t idc_to_addrlen;
173 struct iscsi_daemon_send {
174 unsigned int ids_session_id;
178 size_t ids_data_segment_len;
179 void *ids_data_segment;
183 struct iscsi_daemon_receive {
184 unsigned int idr_session_id;
188 size_t idr_data_segment_len;
189 void *idr_data_segment;
193 #define ISCSIDCONNECT _IOWR('I', 0x04, struct iscsi_daemon_connect)
194 #define ISCSIDSEND _IOWR('I', 0x05, struct iscsi_daemon_send)
195 #define ISCSIDRECEIVE _IOWR('I', 0x06, struct iscsi_daemon_receive)
197 #endif /* ICL_KERNEL_PROXY */
200 * The following ioctls are used by iscsictl(8).
202 struct iscsi_session_add {
203 struct iscsi_session_conf isa_conf;
207 struct iscsi_session_remove {
208 unsigned int isr_session_id;
209 struct iscsi_session_conf isr_conf;
213 struct iscsi_session_list {
214 unsigned int isl_nentries;
215 struct iscsi_session_state *isl_pstates;
219 struct iscsi_session_modify {
220 unsigned int ism_session_id;
221 struct iscsi_session_conf ism_conf;
225 #define ISCSISADD _IOW('I', 0x11, struct iscsi_session_add)
226 #define ISCSISREMOVE _IOW('I', 0x12, struct iscsi_session_remove)
227 #define ISCSISLIST _IOWR('I', 0x13, struct iscsi_session_list)
228 #define ISCSISMODIFY _IOWR('I', 0x14, struct iscsi_session_modify)
230 #endif /* !ISCSI_IOCTL_H */