160 lines
4.7 KiB
C
160 lines
4.7 KiB
C
/*-
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* Copyright (c) 2012 The FreeBSD Foundation
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* All rights reserved.
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*
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* This software was developed by Edward Tomasz Napierala under sponsorship
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* from the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef ICL_H
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#define ICL_H
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/*
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* iSCSI Common Layer. It's used by both the initiator and target to send
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* and receive iSCSI PDUs.
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*/
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struct icl_conn;
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struct icl_pdu {
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STAILQ_ENTRY(icl_pdu) ip_next;
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struct icl_conn *ip_conn;
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struct iscsi_bhs *ip_bhs;
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struct mbuf *ip_bhs_mbuf;
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size_t ip_ahs_len;
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struct mbuf *ip_ahs_mbuf;
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size_t ip_data_len;
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struct mbuf *ip_data_mbuf;
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/*
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* User (initiator or provider) private fields.
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*/
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uint32_t ip_prv0;
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uint32_t ip_prv1;
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uint32_t ip_prv2;
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};
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struct icl_pdu *icl_pdu_new_bhs(struct icl_conn *ic, int flags);
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size_t icl_pdu_data_segment_length(const struct icl_pdu *ip);
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int icl_pdu_append_data(struct icl_pdu *ip, const void *addr, size_t len, int flags);
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void icl_pdu_get_data(struct icl_pdu *ip, size_t off, void *addr, size_t len);
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void icl_pdu_queue(struct icl_pdu *ip);
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void icl_pdu_free(struct icl_pdu *ip);
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#define ICL_CONN_STATE_INVALID 0
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#define ICL_CONN_STATE_BHS 1
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#define ICL_CONN_STATE_AHS 2
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#define ICL_CONN_STATE_HEADER_DIGEST 3
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#define ICL_CONN_STATE_DATA 4
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#define ICL_CONN_STATE_DATA_DIGEST 5
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#define ICL_MAX_DATA_SEGMENT_LENGTH (128 * 1024)
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struct icl_conn {
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struct mtx *ic_lock;
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struct socket *ic_socket;
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#ifdef DIAGNOSTIC
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volatile u_int ic_outstanding_pdus;
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#endif
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STAILQ_HEAD(, icl_pdu) ic_to_send;
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bool ic_check_send_space;
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size_t ic_receive_len;
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int ic_receive_state;
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struct icl_pdu *ic_receive_pdu;
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struct cv ic_send_cv;
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struct cv ic_receive_cv;
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bool ic_header_crc32c;
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bool ic_data_crc32c;
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bool ic_send_running;
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bool ic_receive_running;
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size_t ic_max_data_segment_length;
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bool ic_disconnecting;
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bool ic_iser;
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const char *ic_name;
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void (*ic_receive)(struct icl_pdu *);
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void (*ic_error)(struct icl_conn *);
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/*
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* User (initiator or provider) private fields.
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*/
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void *ic_prv0;
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};
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struct icl_conn *icl_conn_new(const char *name, struct mtx *lock);
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void icl_conn_free(struct icl_conn *ic);
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int icl_conn_handoff(struct icl_conn *ic, int fd);
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void icl_conn_shutdown(struct icl_conn *ic);
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void icl_conn_close(struct icl_conn *ic);
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bool icl_conn_connected(struct icl_conn *ic);
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#ifdef ICL_KERNEL_PROXY
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struct sockaddr;
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struct icl_listen;
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struct icl_listen_sock {
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TAILQ_ENTRY(icl_listen_sock) ils_next;
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struct icl_listen *ils_listen;
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struct socket *ils_socket;
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bool ils_running;
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bool ils_disconnecting;
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int ils_id;
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};
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struct icl_listen {
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TAILQ_HEAD(, icl_listen_sock) il_sockets;
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struct sx il_lock;
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void (*il_accept)(struct socket *,
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struct sockaddr *, int);
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};
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/*
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* Initiator part.
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*/
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int icl_conn_connect(struct icl_conn *ic, bool rdma,
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int domain, int socktype, int protocol,
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struct sockaddr *from_sa, struct sockaddr *to_sa);
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/*
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* Target part.
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*/
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struct icl_listen *icl_listen_new(void (*accept_cb)(struct socket *,
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struct sockaddr *, int));
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void icl_listen_free(struct icl_listen *il);
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int icl_listen_add(struct icl_listen *il, bool rdma,
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int domain, int socktype, int protocol,
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struct sockaddr *sa, int portal_id);
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int icl_listen_remove(struct icl_listen *il, struct sockaddr *sa);
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/*
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* This one is not a public API; only to be used by icl_proxy.c.
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*/
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int icl_conn_handoff_sock(struct icl_conn *ic, struct socket *so);
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#endif /* ICL_KERNEL_PROXY */
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#endif /* !ICL_H */
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