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/*-
* Copyright (c) 2012 The FreeBSD Foundation
* All rights reserved.
*
* 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 ICL_H
#define ICL_H
/*
* iSCSI Common Layer. It's used by both the initiator and target to send
* and receive iSCSI PDUs.
*/
struct icl_conn;
struct icl_pdu {
STAILQ_ENTRY(icl_pdu) ip_next;
struct icl_conn *ip_conn;
struct iscsi_bhs *ip_bhs;
struct mbuf *ip_bhs_mbuf;
size_t ip_ahs_len;
struct mbuf *ip_ahs_mbuf;
size_t ip_data_len;
struct mbuf *ip_data_mbuf;
/*
* User (initiator or provider) private fields.
*/
uint32_t ip_prv0;
uint32_t ip_prv1;
uint32_t ip_prv2;
};
struct icl_pdu *icl_pdu_new_bhs(struct icl_conn *ic, int flags);
size_t icl_pdu_data_segment_length(const struct icl_pdu *ip);
int icl_pdu_append_data(struct icl_pdu *ip, const void *addr, size_t len, int flags);
void icl_pdu_get_data(struct icl_pdu *ip, size_t off, void *addr, size_t len);
void icl_pdu_queue(struct icl_pdu *ip);
void icl_pdu_free(struct icl_pdu *ip);
#define ICL_CONN_STATE_INVALID 0
#define ICL_CONN_STATE_BHS 1
#define ICL_CONN_STATE_AHS 2
#define ICL_CONN_STATE_HEADER_DIGEST 3
#define ICL_CONN_STATE_DATA 4
#define ICL_CONN_STATE_DATA_DIGEST 5
#define ICL_MAX_DATA_SEGMENT_LENGTH (128 * 1024)
struct icl_conn {
struct mtx *ic_lock;
struct socket *ic_socket;
#ifdef DIAGNOSTIC
volatile u_int ic_outstanding_pdus;
#endif
STAILQ_HEAD(, icl_pdu) ic_to_send;
bool ic_check_send_space;
size_t ic_receive_len;
int ic_receive_state;
struct icl_pdu *ic_receive_pdu;
struct cv ic_send_cv;
struct cv ic_receive_cv;
bool ic_header_crc32c;
bool ic_data_crc32c;
bool ic_send_running;
bool ic_receive_running;
size_t ic_max_data_segment_length;
bool ic_disconnecting;
bool ic_iser;
const char *ic_name;
void (*ic_receive)(struct icl_pdu *);
void (*ic_error)(struct icl_conn *);
/*
* User (initiator or provider) private fields.
*/
void *ic_prv0;
};
struct icl_conn *icl_conn_new(const char *name, struct mtx *lock);
void icl_conn_free(struct icl_conn *ic);
int icl_conn_handoff(struct icl_conn *ic, int fd);
void icl_conn_shutdown(struct icl_conn *ic);
void icl_conn_close(struct icl_conn *ic);
bool icl_conn_connected(struct icl_conn *ic);
#ifdef ICL_KERNEL_PROXY
struct sockaddr;
struct icl_listen;
struct icl_listen_sock {
TAILQ_ENTRY(icl_listen_sock) ils_next;
struct icl_listen *ils_listen;
struct socket *ils_socket;
bool ils_running;
bool ils_disconnecting;
int ils_id;
};
struct icl_listen {
TAILQ_HEAD(, icl_listen_sock) il_sockets;
struct sx il_lock;
void (*il_accept)(struct socket *,
struct sockaddr *, int);
};
/*
* Initiator part.
*/
int icl_conn_connect(struct icl_conn *ic, bool rdma,
int domain, int socktype, int protocol,
struct sockaddr *from_sa, struct sockaddr *to_sa);
/*
* Target part.
*/
struct icl_listen *icl_listen_new(void (*accept_cb)(struct socket *,
struct sockaddr *, int));
void icl_listen_free(struct icl_listen *il);
int icl_listen_add(struct icl_listen *il, bool rdma,
int domain, int socktype, int protocol,
struct sockaddr *sa, int portal_id);
int icl_listen_remove(struct icl_listen *il, struct sockaddr *sa);
/*
* This one is not a public API; only to be used by icl_proxy.c.
*/
int icl_conn_handoff_sock(struct icl_conn *ic, struct socket *so);
#endif /* ICL_KERNEL_PROXY */
#endif /* !ICL_H */
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