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
38 * iSCSI Common Layer. It's used by both the initiator and target to send
39 * and receive iSCSI PDUs.
42 #include <sys/types.h>
44 #include <sys/condvar.h>
45 #include <sys/sysctl.h>
47 SYSCTL_DECL(_kern_icl);
51 #define ICL_DEBUG(X, ...) \
54 printf("%s: " X "\n", __func__, ## __VA_ARGS__);\
57 #define ICL_WARN(X, ...) \
59 if (icl_debug > 0) { \
60 printf("WARNING: %s: " X "\n", \
61 __func__, ## __VA_ARGS__); \
70 STAILQ_ENTRY(icl_pdu) ip_next;
71 struct icl_conn *ip_conn;
72 struct iscsi_bhs *ip_bhs;
73 struct mbuf *ip_bhs_mbuf;
75 struct mbuf *ip_ahs_mbuf;
77 struct mbuf *ip_data_mbuf;
80 * User (initiator or provider) private fields.
86 #define ICL_CONN_STATE_INVALID 0
87 #define ICL_CONN_STATE_BHS 1
88 #define ICL_CONN_STATE_AHS 2
89 #define ICL_CONN_STATE_HEADER_DIGEST 3
90 #define ICL_CONN_STATE_DATA 4
91 #define ICL_CONN_STATE_DATA_DIGEST 5
93 #define ICL_MAX_DATA_SEGMENT_LENGTH (128 * 1024)
95 #define ICL_NOCOPY (1 << 30)
100 struct socket *ic_socket;
102 volatile u_int ic_outstanding_pdus;
104 STAILQ_HEAD(, icl_pdu) ic_to_send;
105 bool ic_check_send_space;
106 size_t ic_receive_len;
107 int ic_receive_state;
108 struct icl_pdu *ic_receive_pdu;
109 struct cv ic_send_cv;
110 struct cv ic_receive_cv;
111 bool ic_header_crc32c;
113 bool ic_send_running;
114 bool ic_receive_running;
115 size_t ic_max_data_segment_length;
117 bool ic_disconnecting;
121 const char *ic_offload;
123 void (*ic_receive)(struct icl_pdu *);
124 void (*ic_error)(struct icl_conn *);
127 * User (initiator or provider) private fields.
132 struct icl_drv_limits {
133 int idl_max_recv_data_segment_length;
134 int idl_max_send_data_segment_length;
135 int idl_max_burst_length;
136 int idl_first_burst_length;
140 typedef void (*icl_pdu_cb)(struct icl_pdu *, int error);
142 struct icl_conn *icl_new_conn(const char *offload, bool iser, const char *name,
144 int icl_limits(const char *offload, bool iser,
145 struct icl_drv_limits *idl);
146 int icl_register(const char *offload, bool iser, int priority,
147 int (*limits)(struct icl_drv_limits *),
148 struct icl_conn *(*new_conn)(const char *, struct mtx *));
149 int icl_unregister(const char *offload, bool rdma);
151 #ifdef ICL_KERNEL_PROXY
159 struct icl_listen *icl_listen_new(void (*accept_cb)(struct socket *,
160 struct sockaddr *, int));
161 void icl_listen_free(struct icl_listen *il);
162 int icl_listen_add(struct icl_listen *il, bool rdma,
163 int domain, int socktype, int protocol,
164 struct sockaddr *sa, int portal_id);
165 int icl_listen_remove(struct icl_listen *il, struct sockaddr *sa);
168 * Those two are not a public API; only to be used between icl_soft.c
169 * and icl_soft_proxy.c.
171 int icl_soft_handoff_sock(struct icl_conn *ic, struct socket *so);
172 int icl_soft_proxy_connect(struct icl_conn *ic, int domain,
173 int socktype, int protocol, struct sockaddr *from_sa,
174 struct sockaddr *to_sa);
175 #endif /* ICL_KERNEL_PROXY */