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
36 * iSCSI Common Layer. It's used by both the initiator and target to send
37 * and receive iSCSI PDUs.
40 #include <sys/types.h>
42 #include <sys/condvar.h>
43 #include <sys/sysctl.h>
45 SYSCTL_DECL(_kern_icl);
49 #define ICL_DEBUG(X, ...) \
52 printf("%s: " X "\n", __func__, ## __VA_ARGS__);\
55 #define ICL_WARN(X, ...) \
57 if (icl_debug > 0) { \
58 printf("WARNING: %s: " X "\n", \
59 __func__, ## __VA_ARGS__); \
68 STAILQ_ENTRY(icl_pdu) ip_next;
69 struct icl_conn *ip_conn;
70 struct iscsi_bhs *ip_bhs;
71 struct mbuf *ip_bhs_mbuf;
73 struct mbuf *ip_ahs_mbuf;
75 struct mbuf *ip_data_mbuf;
78 * User (initiator or provider) private fields.
85 #define ICL_CONN_STATE_INVALID 0
86 #define ICL_CONN_STATE_BHS 1
87 #define ICL_CONN_STATE_AHS 2
88 #define ICL_CONN_STATE_HEADER_DIGEST 3
89 #define ICL_CONN_STATE_DATA 4
90 #define ICL_CONN_STATE_DATA_DIGEST 5
92 #define ICL_MAX_DATA_SEGMENT_LENGTH (128 * 1024)
97 struct socket *ic_socket;
99 volatile u_int ic_outstanding_pdus;
101 STAILQ_HEAD(, icl_pdu) ic_to_send;
102 bool ic_check_send_space;
103 size_t ic_receive_len;
104 int ic_receive_state;
105 struct icl_pdu *ic_receive_pdu;
106 struct cv ic_send_cv;
107 struct cv ic_receive_cv;
108 bool ic_header_crc32c;
110 bool ic_send_running;
111 bool ic_receive_running;
112 size_t ic_max_data_segment_length;
113 bool ic_disconnecting;
116 const char *ic_offload;
118 void (*ic_receive)(struct icl_pdu *);
119 void (*ic_error)(struct icl_conn *);
122 * User (initiator or provider) private fields.
127 struct icl_conn *icl_new_conn(const char *offload, const char *name,
129 int icl_limits(const char *offload, size_t *limitp);
131 int icl_register(const char *offload, int priority,
132 int (*limits)(size_t *),
133 struct icl_conn *(*new_conn)(const char *, struct mtx *));
134 int icl_unregister(const char *offload);
136 #ifdef ICL_KERNEL_PROXY
144 struct icl_listen *icl_listen_new(void (*accept_cb)(struct socket *,
145 struct sockaddr *, int));
146 void icl_listen_free(struct icl_listen *il);
147 int icl_listen_add(struct icl_listen *il, bool rdma,
148 int domain, int socktype, int protocol,
149 struct sockaddr *sa, int portal_id);
150 int icl_listen_remove(struct icl_listen *il, struct sockaddr *sa);
153 * Those two are not a public API; only to be used between icl_soft.c and icl_proxy.c.
155 int icl_soft_handoff_sock(struct icl_conn *ic, struct socket *so);
156 int icl_soft_proxy_connect(struct icl_conn *ic, int domain,
157 int socktype, int protocol, struct sockaddr *from_sa,
158 struct sockaddr *to_sa);
159 #endif /* ICL_KERNEL_PROXY */